Claims
- 1. A one-component system based on coreactive latexes which is able to lead to coatings which are crosslinkable at room temperature and post-crosslinkable by heat treatment, the said system consisting essentially of the mixture of two separately prepared particle dispersions (A) and (B), each obtained by aqueous emulsion polymerization of a monomer composition A and B, respectively,
- (a) at least one free-radically polymerizable ethylenically unsaturated monomer comprising a functional group ##STR8## where X represents O or S, which enters into the monomer composition A; and
- (b) at least one free-radically polymerizable ethylenically unsaturated monomer comprising an aldehyde or masked aldehyde functional group selected from acetal, mercaptal, mercaptol, dioxolane and dithiolane, which enters into the monomer composition B, the proportions and members of (A) and (B) providing said mixture with the capability of yielding a film having a higher degree of cross-linking at 23.degree. C. and a higher breaking stress than either (A) or (B) alone.
- 2. A system according to claim 1, characterized in that the monomer or monomers (a) are selected from those represented by the formulae (I) to (III) below: ##STR9## in which: X represents O or S;
- R.sup.1 is a free-radically polymerizable ethylenically unsaturated group;
- R.sup.2 is a hydrogen atom or a C.sub.1 -C.sub.8 alkyl group; and
- A is an alkylene chain which has 2 or 3 carbon atoms and can be substituted by lower alkyl and/or hydroxyl and/or C.sub.1 -C.sub.4 alkoxy, and/or which can be interrupted by carbonyl.
- 3. A system according to claim 2, characterized in that R.sup.1 is selected from the groups: ##STR10## where: R.sup.3 represents hydrogen, 3-alkyloxy-2-hydroxypropyl, vinyl, methacryloyl, acryloyl or methacryloyloxyaceto;
- A.sup.1 represents O, NH or NR.sup.4 ;
- R.sup.4 represents 3-allyloxy-2-hydroxypropyl when R.sup.3 represents 3-allyloxy-2-hydroxypropyl;
- Alk represents a C.sub.2 -C.sub.8 alkylene chain; and
- 2-(.beta.-carboxyacrylamido)ethyl.
- 4. A system according to claim 1, characterized in that the monomer or monomers (a) are selected from N-(2-methacryloyloxyethyl)ethyleneurea, N-(2-acryloyloxyethyl)ethyleneurea, N-(methacrylamidomethylene)ethyleneurea, N-(acrylamidomethylene)ethyleneurea, N-(.beta.-methacrylamidoethyl)ethyleneurea, N-(.beta.-acrylamidoethyl)ethyleneurea, N-vinylethyleneurea, N-vinyloxyethylethyleneurea, N-[.beta.-(methacryloyloxyacetamido)ethyl]-N,N'-ethyleneurea, N-[.beta.-(acryloyloxyacetamido)ethyl]ethyleneurea, 1-[2-[[2-hydroxy-3-(2-propenyloxy)propyl]amino]ethyl]-2-imidazolidone, N-methacrylamidomethylurea, N-methacryloylurea, N-(3-[1,3-diazacyclohexan-2-one]propyl)methacrylamide, N-hydroxyethylethyleneurea, N-aminoethylethyleneurea, N-(3-allyloxy-2-hydroxypropyl)aminoethylethyleneurea, N-methacrylaminoethylethyleneurea, N-acrylaminoethylethyleneurea, N-methacryloxyacetoxyethylethyleneurea, N-methacryloxyacetaminoethylethyleneurea and N-di(3-allyloxy-2-hydroxypropyl)aminoethylethyleneurea, N-(2-acryloyloxyethyl)ethyleneurea, N-methacrylamidomethylurea and the allylalkylethyleneureas.
- 5. A system according to claim 1, characterized in that the monomer (a) is N-(2-methacryloyloxyethyl)ethyleneurea(1-(2-methacryloyloxyethyl)imidazolin-2-one).
- 6. A system according to claim 1, characterized in that the monomer or monomers (b), are the masked aldehydes of the formula: ##STR11## in which formulae (IVa) and (IVb): R.sup.5 represents a hydrogen atom or a methyl radical;
- R.sup.6 and R.sup.7 are identical and each represent a C.sub.1 -C.sub.8 -alkyl group or else together form a group --CH.sub.2 --CR.sup.8 R.sup.9 --(CH.sub.2).sub.n -- where n=0 or 1 and R.sup.8 and R.sup.9, which are identical or different, each represent a hydrogen atom or a methyl group;
- E represents O, NH or NR' (R'=C.sub.1 -C.sub.4 alkyl);
- G represents a C.sub.1 -C.sub.4 alkylene radical or a radical ##STR12## where R.sup.10 represents a hydrogen atom or a C.sub.1 -C.sub.4 alkyl radical.
- 7. A system according to claim 1, characterized in that the monomer (b) is selected from:
- the N-(2,2-dialkoxy-1-hydroxyethyl)(meth)acrylamides and the N-(1,2,2-trialkoxyethyl)(meth)acrylamides, wherein the term alkoxy signifies C.sub.1 -C.sub.4 alkoxy,
- 4-acrylamidobutyraldehyde dimethyl or diethyl acetal;
- methacrylamidoacetaldehyde dimethyl acetal;
- diethoxypropyl acrylate;
- diethoxypropyl methacrylate;
- acryloyloxypropyl-1,3-dioxolane;
- methacryloyloxypropyl-1,3-dioxolane; and
- N-(1,1-dimethoxybut-4-yl)methacrylamide.
- 8. A system according to claim 1, characterized in that the monomer or monomers (a) and (b) represent from 0.5 to 10% by weight of the monomer composition A and B respectively.
- 9. A system according to claim 1, characterized in that the proportions of the two coreactive latexes are chosen such that the proportion of the polymer (A) is between 5 and 95% by weight, of the polymers (A) and (B), and the proportion of the polymer (B) is between 95 and 5% by weight, of the polymers (A) and (B), the nonvolatiles content of each of the dispersions being between 20 and 60% by weight.
- 10. A system according to claim 1, characterized in that the size of the particles of each of the dispersions (A) and (B) is between 50 and 500 nm.
- 11. A system according to claim 8, characterized in that monomers other than the monomers (a) and (b) of the two particle dispersions (A) and (B) are chosen so that the glass transition temperatures (Tg) of the resulting copolymers are adapted to the intended field of application, by the combination of monomers capable of leading to homopolymers having a high Tg with monomers capable of leading to homopolymers having a low Tg.
- 12. A system according to claim 11, characterized in that the monomers capable of leading to homopolymers having a low Tg are selected from ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, nonyl acrylate and vinyl 2-ethylhexanoate; and the monomers capable of leading to homopolymers having a high Tg are selected from methyl methacrylate, vinyl acetate, styrene, acrylic acid, methacrylic acid and acrylamide.
- 13. A composition comprising a one-component system of coreactive latexes, as defined in claim 1, said composition being a binder intended for producing a crosslinkable coating, a paint in the architectural field, a varnish or a finish for leather, a finish for textiles, a protective varnish for wood, or a composition for the coating of paper; a binder and/or impregnating agent for woven or nonwoven textile materials, paper, cardboard, fiber webs; or as an adhesive composition for wood.
- 14. A system according to claim 1, characterized in that the monomer or monomer s(b), are aldehydes selected from, methacrolein, formylstyrene, crotonaldehyde and the aldehydes of the formula: ##STR13## and the masked aldehydes of the formula: ##STR14## in which formulae (IVa) and (IVb): R.sup.5 represents a hydrogen atom or methyl radical;
- R.sup.6 and R.sup.7 are identical and each represent a C.sub.1 -C.sub.8 -alkyl group or else together form a group --CH.sub.2 --CR.sup.8 R.sup.9 --(CH.sub.2).sub.n -- where n=0 or 1 and R.sup.8 and R.sup.9, which are identical or different, each represent hydrogen atom or a methyl group;
- E represents O, NH or NR', (R'=C.sub.1 -C.sub.4 -alkyl);
- G represents a C.sub.1 -C.sub.4 -alkylene radical or a radical ##STR15## where R.sup.10 represents a a hydrogen atom or a C.sub.1 -C.sub.4 -alkyl radical.
- 15. A system according to claim 4, characterized in that the monomer (b) is selected from:
- the N-(2,2-dialkoxy-1-hydroxyethyl)(meth)acrylamides and the N-(1,2,2-trialkoxyethyl)(meth)acrylamides, wherein the term alkoxy signifies C.sub.1 -C.sub.4 -alkoxy;
- 4-acrylamidobutyraldehyde dimethyl or diethyl acetal;
- methacrylamidoacetaldehyde dimethyl acetal;
- diethoxypropyl acrylate;
- diethoxyporpyl methacrylate;
- acryloyloxypropyl-1,3-dioxolane;
- methacryloyloxypropyl-1,3-dioxolane; and
- N-(1,1-dimethoxybut-4-yl)methacrylamide.
- 16. A partially crosslinked film produced by applying the system of claim 1 to a substrate.
- 17. A crosslinked film obtained by heating the film of claim 16, the crosslinking being augmented thereby.
- 18. A system according to claim 14, characterized in that the monomer or monomer s(a) and (b) represent from 0.5 to 10% by weight of the monomer composition A and B, respectively.
- 19. A system according to claim 18, characterized in that the size of the particles of each of the dispersions (A) and (B) is between 50 and 500 nm.
- 20. A system according to claim 15, wherein the monomers (a) and (b) represent from 0.5 to 10% by weight of the monomers in composition A and B, respectively; the proportion of the polymer (A) is between 5 and 95% by weight, of the polymer s(A) and (B), and the proportion of the polymer (B) is between 95 and 5% by weight, of the polymer s(A) and (B), the nonvolatiles content of each of the dispersions being between 20 and 60% by weight; and the size of the particles of each of the dispersions (A) and (B) is between 50 and 500 nm.
- 21. A one-component system based on coreactive latexes which is able to lead to coatings which are crosslinkable at room temperature and post-crosslinkable by heat treatment, the said system consisting of the mixture of two particle dispersions (A) and (B), each obtained by aqueous emulsion polymerization of a monomer composition A and B, respectively,
- (a) at least one free-radically polymerizable ethylenically unsaturated monomer comprising a functional group ##STR16## where X represents O or S, which enters into the monomer composition A; and
- (b) at least one free-radically polymerizable ethylenically unsaturated monomer which enters into the monomer composition (B) said monomer entering into the composition (B) being selected from the group consisting of the N-(2,2-dialkoxy-1-hydroxyethyl) (meth)acrylamides and the N-(1,2,2-trialkoxyethyl)(meth)acrylamides, wherein the term alkoxy signifies C.sub.1 -C.sub.4 alkoxy, 4-acrylamidobutyraldehyde dimethyl or diethyl acetal; methacrylamidoacetaldehyde dimethyl acetal; diethoxypropyl acrylate; diethoxypropyl methacrylate; acryloyloxypropyl-1,3-dioxolane; methacryloyloxypropyl-1,3-dioxolane; and N-(1,1-dimethoxybut-4-yl) methacrylamide.
- 22. A system according to claim 21, characterized in that the monomer or monomers (a) are selected from N-(2-methacryloyloxyethyl)ethyleneurea, N-(2-acryloyloxyethyl)ethyleneurea, N-(methacrylamidomethylene)ethyleneurea, N-(acrylamidomethylene)ethyleneurea, N-(.beta.-methacrylamidoethyl)ethyleneurea, N-(.beta.-acrylamidoethyl)ethyleneurea, N-vinylethyleneurea, N-vinyloxyethylethyleneurea, N-[.beta.-(methacryloyloxyacetamido)ethyl]-N,N'-ethyleneurea, N-[.beta.-(acryloyloxyacetamide)ethyl]ethyleneurea, 1-[2-[[2-hydroxy-3-(2-propenyloxy)propyl]amino]ethyl]-2-imidazolidone, N-methacrylamidomethylurea, N-methacryloylurea, N-(3-[1,3-diazacyclohexan-2-one]propyl)methacrylamide, N-hydroxyethylethyleneurea, N-aminoethylethyleneurea, N-(3-allyloxy-2-hydroxypropyl)aminoethylethyleneurea, N-methacrylaminoethylethyleneurea, N-acrylaminoethylethyleneurea, N-acrylaminoethylethyleneurea, N-methacryloxyacetoxyethylethyleneurea, N-methacryloxyacetaminoethylethyleneurea and N-di(3-allyoxy-2-hydroxypropyl)aminoethylethyleneurea, N-(2-acryloyloxyethyl)ethyleneurea, N-methacrylamidomethylurea and the allylalkylethyleneureas.
- 23. A system according to claim 21, wherein said monomer (B) is selected from the group consisting of:
- N-(2,2-dimethoxy-1-hydroxyethyl)acrylamide;
- N-(2,2-dimethoxy-1-hydroxyethyl)methacrylamide;
- N-(1,2,2-trimethoxyethyl)acrylamide;
- N-(1,2,2-trimethoxyethyl)methacrylamide;
- N-(2,2-dibutoxy-1-hydroxyethyl)acrylamide;
- N-(2,2-dibutoxy-1-hydroxyethyl)methacrylamide;
- N-(1,2,2-tributoxyethyl)acrylamide; and
- N-(1,2,2-tributoxyethyl)methacrylamide.
- 24. A system according to claim 22, wherein said monomer (B) is selected from the group consisting of:
- N-(2,2-dimethoxy-1-hydroxyethyl)acrylamide;
- N-(2,2-dimethoxy-1-hydroxyethyl)methacrylamide;
- N-(1,2,2-trimethoxyethyl)acrylamide;
- N-(1,2,2-trimethoxyethyl)methacrylamide;
- N-(2,2-dibutoxy-1-hydroxyethyl)acrylamide;
- N-(2,2-dibutoxy-1-hydroxyethyl)methacrylamide;
- N-(1,2,2-tributoxyethyl)acrylamide; and
- N-(1,2,2-tributoxyethyl)methacrylamide.
- 25. A system according to claim 1, and the proportion of the polymer (A) is between 25 and 75% by weight of the polymers (A) and (B) and the proportion of the polymer (B) is between 75 and 25% by weight of the polymers (A) and (B).
- 26. A method of increasing the room temperature cross-linking and breaking stress of films produced from latices, said method comprising mixing in sufficient proportions, separately prepared particle dispersions (A) and (B), each obtained by aqueous emulsion polymerization of a monomer composition A and B, respectively,
- (a) at least one free-radically polymerizable ethylenically unsaturated monomer comprising a functional group ##STR17## where X represents O or S, which enters into the monomer composition A; and
- (b) at least one free-radically polymerizable ethylenically unsaturated monomer which enters into the monomer composition (B) said monomer entering into the composition (B) being selected from the group consisting of the N-(2,2-dialkoxy-1-hydroxyethyl) (meth)acrylamides and the N-(1,2,2-trialkoxyethyl)(meth)acrylamides, wherein the term alkoxy signifies C.sub.1 -C.sub.4 alkoxy, 4-acrylamidobutyraldehyde dimethyl or diethyl acetal; methacrylamidoacetaldehyde dimethyl acetal; diethoxypropyl acrylate; diethoxypropyl methacrylate; acryloyloxypropyl-1,3-dioxolane; methacryloyloxypropyl-1,3-dioxolane; and N-(1,1-dimethoxybut-4-yl) methacrylamide;
- and forming a film from said mixture.
- 27. A composition according to claim 1, wherein ethyl acrylate constitutes a predominant proportion of the monomers in both latex (A) and latex (B).
- 28. A process according to claim 26, wherein the ethyl acrylate constitutes a predominant proportions of the monomers in both latex (A) and latex (B).
Priority Claims (1)
Number |
Date |
Country |
Kind |
97/05269 |
Apr 1997 |
FRX |
|
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to a concurrently filed application entitled: "One-Component System Based on Coreactive Latexes Leading to Coatings which are Crosslinkable at Room Temperature and Post-Crosslinkable by Heat Treatment, and Their Application in the Field of Coatings", U.S. Ser. No. 09/065,446, based on French Application No. 97/05270, filed Apr. 29, 1997.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5143954 |
Hutton et al. |
Sep 1992 |
|