Patent Application
20190241700
A subject matter of the present invention is hydrocarbon polymers comprising two 2-oxo-1,3-dioxolane-4-carboxylate end groups (also known as cyclocarbonate carboxylates), their preparation and their use as adhesive.
Polyurethanes are widely used in the field of adhesives, due to the versatility of their properties, rendered possible by their very high number of structural forms.
Polyurethanes are conventionally synthesized by reaction between a diol and a diisocyanate. Diisocyanates are toxic compounds as such and are generally obtained from phosgene, itself very toxic by inhalation or by contact. The manufacturing process used industrially generally employs the reaction of an amine with an excess of phosgene in order to form an isocyanate.
The search for alternatives to the synthesis of polyurethanes without using isocyanate (or NIPU for Non Isocyanate PolyUrethane) thus represents a major challenge for the adhesives industry.
This search has formed the subject of numerous studies. The avenues most widely studied relate to the use of polymers capable of reacting with amines or amine oligomers to form polyurethanes or structurally similar derivatives of polyurethanes.
Mention may be made, as example of such an approach, of Patent Application WO 2014/091173 on behalf of Bostik and the CNRS, which describes hydrocarbon polymers comprising two end groups having a (2-oxo-1,3-dioxolan-4-yl) ending which are capable of being obtained by ring-opening metathesis polymerization starting from at least one cyclic cycloolefin, at least one unsaturated chain transfer agent comprising a (2-oxo-1,3-dioxolan-4-yl)methyl end group and at least one metathesis catalyst. These polymers can subsequently react with a (poly)amine to form polyurethanes, without employing isocyanate, which can advantageously be used to formulate coating, mastic or adhesive compositions. However, this reaction is relatively lengthy and remains to be improved.
The aim of the present invention is to provide novel intermediates for the synthesis of polymers of polyurethane type which are intended for the manufacture of coating, mastic or adhesive compositions and which overcome, in all or part, the disadvantages of the prior art.
In particular, it is an aim of the present invention to provide novel intermediates, the synthesis of which does not employ isocyanates and which are capable of reacting more rapidly with a (poly)amine, in comparison with the hydrocarbon polymers having (2-oxo-1,3-dioxolan-4-yl) endings of Application WO 2014/091173.
Thus, the present invention relates to a hydrocarbon polymer comprising two 2-oxo-1,3-dioxolane-4-carboxylate end groups (also known as cyclocarbonate carboxylates), the said hydrocarbon polymer having the formula (I):
in which:
The various groups, radicals and letters which are included in the formula (I) and which are defined above retain the same definitions throughout the present text, unless otherwise indicated.
The following alternative forms of the polymer of formula (I), taken individually or in combination, are particularly preferred:
The main chain of the polymer of formula (I) can thus comprise just one repeat unit chosen from:
Preferably, the main chain of the polymer of formula (I) necessarily comprises the repeat unit repeated p1+p2 times, corresponding to a meaning of q is other than 0, and more preferably still the said unit and also that repeated m times.
As is apparent above, the F1 and F2 end groups are generally symmetrical with respect to the main chain, that is to say that they substantially correspond, with the exception of the indices g and d.
The term “end group” is understood to mean a group located at one of the 2 extremities of the main chain of the polymer, which chain consists of one or more repeat units.
The polydispersity index (or PDI) is defined as the ratio Mw/Mn, that is to say the ratio of the weight-average molecular weight to the number-average molecular weight of the polymer.
In the present text, the two average molecular weights Mn and Mw are measured by size exclusion chromatography (or SEC), which is also denoted by the term of gel permeation chromatography (or GPC). The calibration carried out is usually a PEG (PolyEthylene Glycol) or PS (PolyStyrene), preferably PS, calibration.
When one of the indices n1, n2, p1, p2, m, x or y which applies to an assembly of two square brackets is equal to zero, this means that there is no group between the square brackets to which this index applies. Thus, for example, the group:
represents a single bond: , and the group:
represents a double bond: .
The polymers of formula (I) according to the invention are particularly homogeneous and temperature stable.
They can form, after a polyaddition reaction at a temperature of less than 80° C. with a primary and/or secondary polyamine and at the end of a reaction time which is advantageously reduced, a polyurethane which can constitute an adhesive seal.
The adhesive seal thus formed exhibits high cohesive values, in particular of greater than 2 MPa. Such cohesive values make possible use of the said polymer as adhesive, for example as leaktightness seal on an ordinary support (concrete, glass, marble), in the building industry, or also for the adhesive bonding of glazings in the motor vehicle and shipbuilding industries.
The polymers of formula (I) according to the invention are solid or liquid at ambient temperature (i.e. approximately 20° C.).
According to a preferred alternative form of the polymer according to the invention, when m is non-zero, when p1 and p2 are non-zero and when n1 and n2 are each equal to 0 (corresponding to the presence in the main chain of the polymer of the 2 repeat units alone repeated respectively p1+p2 times and m times), then the ratio:
m/(p1+p2+m)
is within the interval ranging from 30 to 70% and more preferably is equal to approximately 50%.
According to a second alternative of this same preferred alternative form, when m is equal to 0, when p1 and p2 are non-zero and when the sum n1+n2 is non-zero (corresponding to the presence in the main chain of the polymer of the 2 repeat units alone repeated respectively p1+p2 times and n1+n2 times), then at least one of the R1, R2, R3, R4, R5, R6, R7 and R8 groups is other than a hydrogen atom, and the ratio:
(n1+n2)/(p1+p2+n1+n2)
is within the interval ranging from 30 to 70% and more preferably is equal to approximately 50%.
According to a third alternative of this same preferred alternative form, when m is other than 0, when p1 and p2 are each equal to 0, when the sum n1+n2 is non-zero (corresponding to the presence in the main chain of the polymer of the 2 repeat units alone repeated respectively m times and n1+n2 times) and when each of the R1, R2, R3, R4, R5, R6, R7 and R8 groups is a hydrogen atom, then the ratio:
m/(m+n1+n2)
is within the interval ranging from 30 to 70% and more preferably is equal to approximately 50%.
According to yet a fourth alternative of the said preferred alternative form, when m is non-zero, when p1 and p2 are non-zero, when the sum n1+n2 is non-zero (corresponding to the presence in the main chain of the polymer of the 3 repeat units) and when each of the R1, R2, R3, R4, R5, R6, R7 and R8 groups is a hydrogen atom, then the ratio:
m/(p1+p2+n1+n2+m)
is within the interval ranging from 30 to 70% and more preferably is equal to approximately 50%.
According to yet a fifth alternative of the said preferred alternative form, when m is non-zero, when p1 and p2 are non-zero, when the sum n1+n2 is non-zero (corresponding to the presence in the main chain of the polymer of the 3 repeat units) and when at least one of the R1, R2, R3, R4, R5, R6, R7 and R8 groups is other than a hydrogen atom, then the ratio:
(m+n1+n2)/(p1+p2+n1+n2+m)
is within the interval ranging from 30 to 70% and more preferably is equal to approximately 50%.
In accordance with the 5 alternatives of the said preferred alternative form, the polymer of formula (I) is generally provided in the form of a viscous liquid and is characterized by a Brookfield viscosity at 23° C. ranging from 1 mPa·s to 500 Pa·s, preferably from 1 to 150 Pa·s and more preferably still from 1 to 50 Pa·s. It is then advantageously easy to employ and can be combined with an additional constituent, such as a tackifying resin or a filler, in order to form an adhesive composition.
When the polymer according to the invention is solid at ambient temperature, it is thermoplastic, that is to say deformable and meltable under hot conditions (i.e. at a temperature greater than ambient temperature). It can thus be used, as a mixture with a polyamine at the time of use, as two-component adhesive applied to the interface of substrates to be assembled at their faying surface.
According to one embodiment of the invention, all the bonds of the formula (I) are carbon-carbon double bonds and the formula (I) then becomes the following formula (I′):
in which x, y, n1, n2, m, p1, p2, F1, F2, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 and R13 have the meanings given above and the bond is a bond geometrically oriented on one side or the other with respect to the double bond (cis or trans).
Each of the double bonds of the polymer of formula (I′) is geometrically cis or trans oriented; preferably is of cis orientation. The geometric isomers of the polymer of formula (I′) are generally present in variable proportions, with most often a majority of double bonds oriented cis (Z) and preferably all oriented cis (Z). It is also possible according to the invention to obtain just one of the geometric isomers, according to the reaction conditions and in particular according to the nature of the catalyst used.
According to another embodiment of the invention, all the bonds of the formula (I) are carbon-carbon single bonds and the formula (I) then becomes the formula (IH) below:
in which x, y, n1, n2, m, p1, p2, F1, F2, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12 and R13 have the meanings given above.
The formula (IH) illustrates the case where the main chain of the polymer of formula (I) is saturated, that is to say comprises only saturated bonds.
In this case, preferably, x is equal to 1 and y is equal to 1.
The polymer of formula (IH) can, for example, result from the hydrogenation of the unsaturated polymer of formula (I′).
According to one embodiment of the polymer of formula (I) according to the invention, m, p1 and p2 are each equal to 0, the polymer being of following formula (II):
in which x, y, n1, n2, F1, F2, R1, R2, R3, R4, R5, R6, R7 and R8 have the meanings given above.
Particularly preferably, x is equal to 1 and y is equal to 1.
According to a particularly preferred form of this embodiment, all the bonds of the formula (II) are carbon-carbon double bonds and the formula (II) then becomes the following formula (II′):
The formulae (II) and (II′) illustrate the case where the main chain of the polymer of formula (I) comprises just one repeat unit, corresponding to that which is repeated n1+n2 times.
According to another embodiment of the polymer of formula (I) according to the invention, n1 and n2 are each equal to 0, the polymer being of following formula (III):
in which m, p1, p2, F1, F2, R9, R10, R11, R12 and R13 have the meanings given above.
According to a particularly preferred form of this embodiment, all the bonds of the formula (III) are carbon-carbon double bonds and the formula (III) then becomes the following formula (III′):
The formulae (III) and (III′) illustrate the case where the main chain of the polymer of formula (I) comprises two repeat units, corresponding to those which are repeated respectively (p1+p2) times and m times.
As regards the 2-oxo-1,3-dioxolane-4-carboxylate end groups of the polymer according to the invention, preferably —(CH2)g— and —(CH2)d— each represent a divalent methylene radical. In this case, F1 and F2 are identical and represent, respectively, the radicals:
The invention also relates to a process for the preparation of a hydrocarbon polymer comprising two 2-oxo-1,3-dioxolane-4-carboxylate end groups of formula (I) according to the invention, the said process comprising at least one ring-opening metathesis polymerization (ROMP) reaction, in the presence:
in which:
F1 and F2 are as defined above;
the bond is a bond geometrically oriented on one side or the other with respect to the double bond (cis or trans); and
in which z is as defined above;
in which R1, R2, R3, R4, R5, R6, R7, R8, x and y are as defined above; and
in which R9, R10, R11, R12 and R13 are as defined above;
the said polymerization reaction being in addition carried out:
In the definition of the preparation process given above, it is clearly understood that the indefinite article “a” or “an” as it relates to a reactant or to the catalyst employed should be interpreted as meaning “at least one”, that is to say “one or more”. In particular, the said process can employ just one or several compound(s) C having either the same formula or else a different formula, preferably of different formula. When the process employs several compound(s) C, the denominator of the ratio r defined above is the sum of the total number of moles of the compounds C employed.
According to a preferred alternative form of the said process, just one compound C is employed, corresponding to the formula (C2).
According to another preferred alternative form of the said process, at least one compound C is employed, corresponding to the formula (C1). According to a more particularly preferred form of the latter alternative form, two compounds C are employed, one corresponding to the formula (C1) and the other to the formula (C3).
The duration and the temperature of the reaction depend generally on its operating conditions, in particular on the nature of the solvent used and especially on the content of catalytic filler. A person skilled in the art is in a position to adjust them as a function of the circumstances.
Thus, preferably, the duration of the polymerization reaction ranges from 2 to 10 hours and the ratio r defined above is within an interval ranging from 0.0010 to 0.3.
(a) Metathesis Catalyst:
The metathesis catalyst is preferably a ruthenium-comprising catalyst and more preferably still a Grubbs catalyst.
Such a catalyst is generally a commercial product.
The metathesis catalyst is generally a transition metal catalyst, including in particular a ruthenium-comprising catalyst, generally in the form of ruthenium complex(es), such as a ruthenium-carbene complex.
The term “Grubbs catalyst” is generally understood to mean, according to the invention, a 1st or 2nd generation Grubbs catalyst but also any other catalyst of Grubbs type (of ruthenium-carbene type) or Hoveyda-Grubbs type accessible to a person skilled in the art, such as, for example, the substituted Grubbs catalysts described in U.S. Pat. No. 5,849,851.
A 1st generation Grubbs catalyst is generally of formula (G1):
in which Ph is phenyl, Cy is cyclohexyl and the P(Cy)3 group is a tricyclohexylphosphine group.
The IUPAC name of this compound is: benzylidenebis(tricyclohexylphosphine)dichlororuthenium (of CAS number 172222-30-9). Such a catalyst is available in particular from Aldrich.
A 2nd generation (or G2) Grubbs catalyst is generally of formula (G2):
in which Ph is phenyl and Cy is cyclohexyl.
The IUPAC name of the second generation of this catalyst is benzylidene[1,3-bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene]dichloro(tricyclohexylphosphine)ruthenium (of CAS number 246047-72-3). This catalyst is also available from Aldrich.
(b) CTA of Formula (B):
The CTA of formula (B) can be prepared from linear unsaturated diol (for example 2-butene-1,4-diol, available from Aldrich) and from 2-oxo-1,3-dioxolane-4-carboxylic acid according to the 3-stage procedure described below adapted from Application WO 2014/206636:
Controlled oxidation of glycerol carbonate to give 2-oxo-1,3-dioxolane-4-carboxylic acid (according to the protocol of Example 2 of WO 2014/206636):
Synthesis of 2-oxo-1,3-dioxolane-4-acyl chloride (according to the protocol of Example 3 of WO 2014/206636):
Synthesis of the CTA of formula (B):
In accordance with a preferred alternative form of the invention, the —(CH2)g— and —(CH2)d— groups included in the formula (B) of the CTA each represent a divalent methylene radical. In this case, F1 and F2 are identical and the CTA of formula (B) is advantageously the compound of formula:
denoted below as CTA.
(c) Compound C of Formula (C1):
The cyclic compound of formula (C1) generally comprises from 8 to 32 carbon atoms.
Preferably, it is chosen from the group formed by:
these 2 compounds being available commercially from Evonik Degussa and Arkema France.
(d) Compound C of Formula (C2):
The compound of formula (C2) generally comprises from 6 to 30 and preferably from 6 to 22 carbon atoms.
Preferably:
According to an even more preferred alternative form:
The compound of formula (C2) is chosen in particular from:
(available from Aldrich),
or also from a 5-alkylcyclooctene, of formula:
in which R is an alkyl radical comprising from 1 to 22 carbon atoms, preferably from 1 to 14 carbon atoms, R being, for example, the n-hexyl radical.
Among these compounds, cyclooctene is very particularly preferred.
(e) Compound C of Formula (C3):
The compound of formula (C3) generally comprises from 6 to 30 and preferably from 6 to 22 carbon atoms.
Preferably:
According to an even more preferred alternative form:
The compound of formula (E) is chosen in particular from:
The compound of formula (C3) can also be chosen from the compounds of following formulae:
in which R is as defined above for the compound of formula (C2).
The compound of formula (C3) can also be chosen from the group formed by the addition products (or adducts) resulting from the Diels-Alder reaction using cyclopentadiene or furan as starting material, and also the compounds derived from norbornene, such as branched norbornenes, such as described in WO 2001/04173 (such as: norbornene isobornyl carboxylate, norbornene phenyl carboxylate, norbornene ethylhexyl carboxylate, norbornene phenoxyethyl carboxylate and alkyl norbornene dicarboxyimide, the alkyl generally comprising from 3 to 8 carbon atoms), and branched norbornenes, such as described in WO 2011/038057 (norbornene dicarboxylic anhydrides and optionally 7-oxanorbornene dicarboxylic anhydrides).
Preference is very particularly given, among the different compounds of formula (C3) cited, to norbornene, 7-oxanorbornene, methyl 5-norbornene-2-carboxylate, of formula:
methyl 5-oxanorbornene-2-carboxylate, of formula:
or dicyclopentadiene.
The stage of ring-opening metathesis polymerization (or ROMP) is generally carried out in the presence of at least one solvent, generally chosen from the group formed by the aqueous or organic solvents typically used in polymerization reactions and which are inert under the conditions of the polymerization, such as aromatic hydrocarbons, chlorinated hydrocarbons, ethers, aliphatic hydrocarbons, alcohols, water or their mixtures. A preferred solvent is chosen from the group formed by benzene, toluene, para-xylene, methylene chloride, dichloroethane, dichlorobenzene, chlorobenzene, tetrahydrofuran, diethyl ether, pentane, hexane, heptane, a mixture of liquid isoparaffins (for example Isopar®), methanol, ethanol, water or their mixtures. More preferably still, the solvent is chosen from the group formed by benzene, toluene, para-xylene, methylene chloride, 1,2-dichloroethane, dichlorobenzene, chlorobenzene, tetrahydrofuran, diethyl ether, pentane, hexane, heptane, methanol, ethanol or their mixtures. More particularly preferably still, the solvent is dichloromethane, 1,2-dichloroethane, toluene, heptane or a mixture of toluene and 1,2-dichloroethane. The solubility of the polymer formed during the polymerization reaction depends generally and mainly on the choice of the solvent, on the natures and the proportions of the comonomers and on the number-average molecular weight of the polymer obtained. It is also possible for the reaction to be carried out without solvent.
The process for the preparation of a hydrocarbon polymer according to the invention can additionally comprise at least one additional stage of hydrogenation of double bonds.
This stage is generally carried out by catalytic hydrogenation, most often under hydrogen pressure and in the presence of a hydrogenation catalyst, such as a catalyst of palladium supported by carbon (Pd/C). It more particularly makes it possible to form a saturated compound of formula (IH) from an unsaturated compound of formula (I′) and in particular the saturated compounds corresponding to the compounds of formulae (II′) and (III′) from unsaturated compounds.
The invention also relates to the use, as adhesive, of the hydrocarbon polymer comprising two 2-oxo-1,3-dioxolane-4-carboxylate end groups, as defined above, as a mixture with an amino compound comprising at least two amine groups, for example chosen from diamines, triamines and higher homologues. The amounts of the hydrocarbon polymer and of the amino compound correspond to stoichiometric amounts, that is to say that the molar ratio of the number of 2-oxo-1,3-dioxolane-4-carboxylate groups to the number of amine groups ranges from 0.8 to 1.2, preferably from 0.9 to 1.1, indeed even is approximately 1.0.
In practice, the hydrocarbon polymer and the amino compound, used as curing agent, are advantageously each included in a component of a two-component composition which is made available to the user. The latter thus, at the time of use of the adhesive, mixes these 2 components, optionally under hot conditions, so as to obtain a liquid adhesive composition.
The invention also relates to a process for assembling two substrates by adhesive bonding, comprising:
The liquid adhesive composition is either the adhesive composition comprising the said compound and the said polymer in the liquid state at ambient temperature or the molten adhesive composition under hot conditions. A person skilled in the art is in a position to proceed so that the adhesive composition used is in the liquid form at the time of its use.
The coating with the liquid adhesive composition is preferably carried out in the form of a layer with a thickness within a range from 0.3 to 5 mm, preferably from 1 to 3 mm, on at least one of the two surfaces which respectively belong to the two substrates to be assembled and which are intended to be brought into contact with one another along a faying surface. Actually bringing the two substrates into contact is then carried out along their faying surface.
Of course, the coating operation and the contacting operation have to be carried out within a compatible time interval, as is well known to a person skilled in the art, that is to say before the adhesive layer applied to the substrate loses its ability to attach, by adhesive bonding, this substrate to another substrate. In general, the polycondensation of the hydrocarbon polymer with the amino compound begins to take place during the coating operation and then continues to take place during the stage in which the two substrates are brought into contact.
The appropriate substrates are, for example, inorganic substrates, such as glass, ceramics, concrete, metals or alloys (such as aluminium alloys, steel, non-ferrous metals and galvanized metals); or else organic substrates, such as wood, plastics, such as PVC, polycarbonate, PMMA, polyethylene, polypropylene, polyesters or epoxy resins; substrates made of metal and composites coated with paint (as in the motor vehicle field).
The following examples are given purely by way of illustration of the invention and should not be interpreted in order to limit the scope thereof.
Use is made of commercially available cyclooctene (denoted below as COE) and of CTA of formula:
The COE (10.8 mmol) and dry 1,2-dichloroethane (5 ml) are introduced into a 20 ml round-bottomed flask in which was also placed a Teflon®-coated magnetic stirring bar. The round-bottomed flask and its contents are subsequently placed under argon.
The compound CTA (0.216 mmol) is subsequently added with stirring to the round-bottomed flask via a syringe. The ratio of the reactants, expressed as number of moles: CTA/COE, is 0.020.
The round-bottomed flask is then immersed in an oil bath at 60° C. and then the catalyst G2 defined above (5.4 μmol) in solution in 1,2-dichloroethane (2 ml) is immediately added using a hollow needle.
The reaction mixture becomes very viscous in the space of 10 minutes. The viscosity subsequently slowly decreases over the following hours.
After 8 hours, counting from the addition of the catalyst, the product present in the round-bottomed flask is extracted after evaporation of the solvent under vacuum. The product is then recovered in the form of a colourless solid powder, after precipitation from methanol, filtering and drying at 20° C. under vacuum, with a degree of conversion of the CTA of 50%.
The 1H/13C NMR analysis of the polymer obtained gives the following values:
1H NMR (CDCl3, 400 MHz, 298 K) δ (ppm)=−repeat unit: 1.29 (8H*n), 1.96 (4H*n), 5.39 (2H*n); end group=5.0 (dd, —O(O)C—CHO-1,3-dioxolan-2-one), 4.6-4.5 (m, —CH2O— 1,3-dioxolan-2-one), 4.7 (s, —CH2-O(O)C—), 5.5 (m, —CH═CH—CH2—O(O)C—), 5.6 (m, —CH═CH—CH2—O(O)C—)
13C NMR (CDCl3, 100 MHz, 298 K) δ (ppm)=repeat unit: 130.34 (trans), 129.88 (cis), 32.63, 29.77, 29.69, 29.24, 29.20, 29.07, 27.26; end group=171.5 (—CH—C(O)—CH2- ester), 154.81 (—C(O)— cyclocarbonate), 74.16 (—CH—C(O)O—), 68.39 (—CH2-CH—C(O)O—), 64.04 (—C(O)O—CH2-CH═CH—)
These values confirm the following structure:
This structure is indeed covered by the formula (II′) defined above.
The number-average molecular weight Mn, measured by NMR, is 5900 g/mol.
The polydispersity index, equal to the ratio Mw/Mn (measured by size exclusion chromatography with polystyrene standard), is 1.4.
Example 1 is repeated, the 10.8 mmol of COE being replaced with 10.8 mmol of 1,5,9-cyclododecatriene (also known as CDT), of formula:
available from Sigma Aldrich.
The ratio of the reactants, expressed as number of moles: CTA/(CDT+norbornene), is 0.020.
A polymer in the form of a solid is also recovered, with a degree of conversion of the CTA of 100%, the 1H/13C NMR analysis of which gives the following values:
1H NMR (CDCl3, 400 MHz, 298 K) δ (ppm)=−repeat unit: 1.29 (8H*n), 1.96 (4H*n), 5.39 (2H*n); end group=5.0 (dd, —O(O)C—CHO-1,3-dioxolan-2-one), 4.6-4.5 (m, —CH2O— 1,3-dioxolan-2-one), 4.7 (s, —CH2-O(O)C—), 5.5 (m, —CH═CH—CH2—O(O)C—), 5.6 (m, —CH═CH—CH2—O(O)C—)
13C NMR (CDCl3, 100 MHz, 298 K): δ (ppm)=repeat unit 27.4, 32.7, 131.4, end group=171.5 (—CH—C(O)—CH2- ester), 154.81 (—C(O)— cyclocarbonate), 74.16 (—CH—C(O)O—), 68.39 (—CH2-CH—C(O)O—), 64.04 (—C(O)O—CH2-CH═CH—)
These values confirm the structure below:
This structure is indeed covered by the formula (III′) defined above.
The number-average molecular weight Mn and the polydispersity index are respectively 8400 g/mol and 1.5.
Example 2 is repeated, the 10.8 mmol of CDT being replaced with a mixture of 5.4 mmol of 1,5,9-cyclododecatriene (also denoted CDT) and of 5.4 mmol of norbornene, of formula:
available from Sigma-Aldrich.
The ratio of the reactants, expressed as number of moles: CTA/(CDT+norbornene), is 0.020.
A polymer in the form of a colourless viscous liquid is also recovered, with a degree of conversion of the CTA of 100%, the 1H/13C NMR analysis of which gives the following values:
1H NMR (CDCl3, 400 MHz, 298 K) δ (ppm)=−repeat unit: 1.29 (8H*n), 1.96 (4H*n), 5.39 (2H*n); end group=5.0 (dd, —O(O)C—CHO— 1,3-dioxolan-2-one), 4.6-4.5 (m, —CH2O— 1,3-dioxolan-2-one), 4.7 (s, —CH2-O(O)C—), 5.5 (m, —CH═CH—CH2—O(O)C—), 5.6 (m, —CH═CH—CH2—O(O)C—)
13C NMR: δ (ppm)=repeat unit: 27.4, 33.1, 42.1, 43.4, 130.4, 133.1, end group=171.5 (—CH—C(O)—CH2- ester), 154.81 (—C(O)— cyclocarbonate), 74.16 (—CH—C(O)O—), 68.39 (—CH2-CH—C(O)O—), 64.04 (—C(O)O—CH2-CH═CH—)
These values confirm the structure below:
This structure is indeed covered by the formula (III′) defined above.
The number-average molecular weight Mn and the polydispersity index are respectively 6700 g/mol and 1.5.
The polyolefin of Example 1 was reacted at 80° C., in a stoichiometric ratio, with a primary diamine of polyether diamine type (Jeffamine EDR 176, Huntsman), until complete disappearance of the infrared band characteristic of the 1,3-dioxolan-2-one groups (at 1800 cm−1) and appearance of the bands characteristic of the carbamate bond (band at 1700 cm−1).
The duration of the reaction recorded during the complete disappearance of the infrared band characteristic of the 1,3-dioxolan-2-one groups was approximately 3 hours at 80° C.
| Number | Date | Country | Kind |
|---|---|---|---|
| 1658607 | Sep 2016 | FR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/FR2017/052402 | 9/11/2017 | WO | 00 |
