Claims
- 1. A process for preparing a stable, fluid and hardenable composition, consisting essentially of mixing:
- a) at least one liquid polymerizable monomer selected from vinylic monomers and C.sub.1 -C.sub.6 alkyl esters of acrylic or methacrylic acid;
- b) a finely ground mineral filler in the amount of from 30 to 80% based upon the total composition;
- c) a silanizing agent for the mineral filler; and
- d) a hydrolysis catalyst of the silanizing agent selected from the ammonium salts of organic acids.
- 2. A process as claimed in claim 1, wherein the polymerizable monomer is selected from methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, methyl acrylate, ethyl acrylate, and butyl acrylate.
- 3. A process as claimed in any of claims 1, wherein the polymerizable monomer is methyl methacrylate, either alone or admixed with up to 50% by weight of one or more other monomers selected from vinylic monomers and C.sub.1 -C.sub.6 alkyl esters of acrylic or methacrylic acid.
- 4. A process as claimed in claim 1, wherein the polymerizable monomer is a vinylic monomer selected from styrene, alpha-methyl-styrene, or acrylonitrile.
- 5. A process as claimed in claim 1, wherein the mineral filler is at least one inorganic substance having a hydrophilic surface containing polar groups capable of reacting with the silanizing agent, or of forming hydrogen bridges with siloxanic groups and having particle diameter from 0.1 to 50 micrometers and a surface area from 0.5 to 10 m.sup.2 /g.
- 6. A process as claimed in claim 5, wherein the mineral filler has particle diameter from 1 to 20 micrometers and a surface area from 2 to 7 m.sup.2 /g.
- 7. A process as claimed in claim 5 or 6, wherein the mineral filler is selected from one or more amorphous or crystalline silica, glass, alumina, aluminium trihydroxide, calcium carbonate, mineral silicates, mineral oxides, and fiberglass.
- 8. A process as claimed in claim 1, wherein the silanizing agent is an organic derivative of silicon containing hydrolysable groups, and is selected from those having general formula:
- R.sub.1 ZR.sub.2 Si(OR).sub.3
- wherein:
- R.sub.1 represents a hydrogen atom, an unsubstituted or substituted saturated or unsaturated alkyl, unsubstituted or substituted cycloalkyl or alkylaryl radical, or an unsubstituted or substituted contain aryl radical wherein said radicals, where appropriate, from 1 to 20 carbon atoms, said substituents being selected from with hydroxy, mercapto, amino, epoxy, carboxyl and esterified or amidated carboxyl groups, or a saturated or unsaturated acyl radical containing from 2 to 20 carbon atoms;
- Z represents a direct bond or a bivalent radical preferably selected from --O--, --NH--, --S--, --CH.sub.2 --;
- R.sub.2 represents a direct bond, an alkylenic or arylenic radical, or an alkyl-substituted alkylenic or arylenic radical containing where appropriate, from 1 to 20 carbon atoms;
- R represents an alkyl, aryl, or alkyl-aryl radical, said radicals, where appropriate, containing from 1 to 20 carbon atoms, and said substituents being selected from alkoxy, alkylamino or alkylmercapto groups, wherein the alkyl group of the alkxy, alkyl-amino or alkylmercapto groups contains from 1 to 12 carbon atoms.
- 9. A process as claimed in claim 8, wherein the silanizing agent is selected from methyltriethoxysilane, methyltrimethoxysilane, vinyltriethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma-methacryloxypropyltris (2-methoxyethoxy)silane, gamma-glycidoxypropyltrimethoxysilane, gamma-mercaptopropyltriethoxysilane, gamma-aminopropyltriethoxysilane, and N-beta (aminoethyl) gamma-amino-propyltrimethoxysilane.
- 10. A process as claimed in claim 1, wherein the silanizing agent is used at a concentration from 0.01 to 2% by weight based on the loaded material.
- 11. A process as claimed in claim 1, wherein the catalyst for silane hydrolysis is selected from the ammonium salts of organic acids having general formula:
- R.sub.4 COO.sup.- [NR.sub.5 R.sub.6 R.sub.7 R.sub.8 ].sup.+
- wherein:
- R.sub.4 represents a hydrogen atom or an unsaturated or saturated alkyl, cycloalkyl, or alkylaryl radical, or an aryl radical said radicals containing, where appropriate from 1 to 20 carbon atoms, and
- R.sub.5, R.sub.6, R.sub.7, R.sub.8, which may be the same as or different from each other, may be hydrogen, or alkyl or cycloalkyl radicals, said radicals containing, where appropriate, from 1 to 20 carbon atoms.
- 12. A process as claimed in claim 1, wherein the amount of catalyst is from 0.01 to 1% by weight based on the total composition.
- 13. A process as claimed in claim 1, wherein a surface-active agent containing ethoxy or propoxy groups is added to the composition.
- 14. A process as claimed in claim 13, wherein the surface-active agent is selected from ethoxylated alkylphenols, sulphonated agents, alkyl sulphates, alkylammonium phosphates and phosphonates, and phosphoric esters.
- 15. A process as claimed in claim 1, wherein the amount of surface-active agent is from 0 to 0.5% by weight based on the total mass.
- 16. A process as claimed in claim 1, wherein the silanizing agent is used at a concentration preferably from 0.05 to 1% by weight based on the loaded material.
- 17. A process as claimed in claim 1, wherein the amount of catalyst is preferably from 0.01 to 0.5% by weight based on the total composition.
- 18. A process as claimed in claim 15, wherein the amount of surface-active agent is from 0.05 to 0.2% by weight based on the total mass.
- 19. A stable, fluid and hardenable composition, consisting essentially of mixing:
- a) at least one liquid polymerizable monomer selected from vinylic monomers and C.sub.1 -C.sub.6 alkyl esters of acrylic or methacrylic acid;
- b) a finely ground mineral filler in the amount of from 30 to 80% based upon the total composition;
- c) a silanizing agent for the mineral filler; and
- d) a hydrolysis catalyst for the silanizing agent, selected from the ammonium salts of organic acids.
- 20. A composition as claimed in claim 19, having a viscosity from 0.01 to 0.3 Pa.s measured at room temperature.
- 21. A process for preparing a stable, fluid and hardenable composition, consisting essentially of mixing:
- a) at least one liquid polymerizable monomer selected from vinylic monomers and C.sub.1 -C.sub.6 alkyl esters of acrylic or methacrylic acid;
- b) a finely ground mineral filler in the amount of from 30 to 80% based upon the total composition;
- c) a silanizing agent for the mineral filler; and
- d) a hydrolysis catalyst for the silanizing agent selected from the group consisting of isopropylammonium acetate, isopropylammonium methacrylate, ammonium oleate, ammonium stearate, ammonium methacrylate, n-propylammonium methacrylate, dimethylammonium butyrate, isopropylammonium oleate, diisopropylammonium benzoate, and ethylammonium acrylate.
Priority Claims (1)
Number |
Date |
Country |
Kind |
23050 A/87 |
Dec 1987 |
ITX |
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Parent Case Info
This is a continuation of co-pending application Ser. No. 07/963,289, filed on Oct. 19, 1992, now abandoned, which is a continuation application Ser. No. 07/760,832, filed on Sep. 10, 1991, now abandoned, which is a continuation application Ser. No. 07/288,975, filed Dec. 23, 1988, now abandoned.
US Referenced Citations (4)
Foreign Referenced Citations (8)
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218866 |
Apr 1987 |
EPX |
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Mar 1987 |
DEX |
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ITX |
51-89554 |
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JPX |
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GBX |
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GBX |
Continuations (3)
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Number |
Date |
Country |
Parent |
963289 |
Oct 1992 |
|
Parent |
760832 |
Sep 1991 |
|
Parent |
288975 |
Dec 1988 |
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