Thermoset resins with hydroxy acrylate, methyl methacrylate and blocked isocyanate |
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| 申请号 | US3676405D | 申请日 | 1970-06-05 | 公开(公告)号 | US3676405A | 公开(公告)日 | 1972-07-11 |
| 申请人 | FORD MOTOR CO; | 发明人 | LABANA SANTOKH S; | ||||
| 摘要 | Novel thermosetting resin powders which can be molded to form products characterized in tensile measurement, by high elongation-to-break, high tensile strength and modulus and a high glass transition temperature are prepared from a mixture of (a) a prepolymer formed by reacting (1) hydroxy ester of acrylic or methacrylic acid and a C2 - C3 diol with (2) methyl methacrylate and (b) a blocked di- or triisocyanate wherein the isocyanate groups are directly attached to an aromatic ring and deblock at temperatures in the range of about 120* to 160* C. | ||||||
| 权利要求 | 2. A molding powder in accordance with claim 1 wherein said copolymer contains between about 30 and about 36 weight percent of said mono-hydroxy ester. 3. A molding powder in accordance with claim 1 wherein said remainder consists essentially of a major amount of methyl methacrylate and a minor amount of methacrylonitrile. 4. A molding powder in accordance with claim 1 wherein said copolymer has average molecular weight in the range of about 6, 000 to about 12,000 with less than about 5 percent of the molecules thereof having molecular weight below about 1,000. 5. A molding powder in accordance with claim 1 which contains between about 1.0 and about 10.0 weight percent of a hydroxylated diluent having molecular weight below about 1,000 and at least two free hydroxyl groups per molecule. 6. A molding powder in accordance with claim 1 wherein said molding powder mix contains about 0.95 to about 1.05 blocked isocyanate groups for each hydroxy group in the same. 7. A molding powder in accordance with claim 1 wherein said isocyanate is selected from triphenyl dimethylene triisocyanate and 4,4'' - diphenyl methane diisocyanate. 8. A molding powder in accordance with claim 1 wherein said isocyanate is triphenyl dimethylene triisocyanate. 9. A molding powder in accordance with claim 1 wherein said isocyanate is 4,4'' - diphenyl methane diisocyanate. 10. A molding powder which comprises an intimate mixture of (a) a copolymer consisting essentially of about 25 to about 40 weight percent of a monohydroxy ester of a C2 - C3 diol and acrylic or methacrylic aCid and a remainder consisting essentially of a major proportion of methyl methacrylate and a minor proportion of methacrylo-nitrile or acrylonitrile and having average molecular weight in the range of about 3,000 to about 16,000, and (b) a caprolactam-blocked di- or tri- isocyanate, said isocyanate being present in sufficient quantity to provide about 0.90 to about 1.10 blocked isocyanate groups for each hydroxy group in said molding powder. 11. A molding powder in accordance with claim 10 wherein said copolymer contains between about 30 and about 36 weight percent of said monohydroxy ester. 12. A molding powder in accordance with claim 10 wherein said copolymer has molecular weight in the range of about 6,000 to about 12,000 with less than 5 percent of the molecules thereof having molecular weight below about 1,000. 13. A molded article having glass transition temperature above about 90* C., tensile strength above about 7,000 psi, tensile modulus above about 400,000 psi, and tensile elongation-to-break above 2 percent and formed from a molding powder which comprises an intimate mixture of (a) a copolymer consisting essentially of about 25 to about 40 weight percent of mono-hydroxy ester of a C2 - C3 diol and acrylic or methacrylic acid and a remainder consisting essentially of methyl methacrylate and having average molecular weight in the range of about 3,000 to about 16,000, and (b) a caprolactam-blocked di- or tri- isocyanate, said isocyanate being present in sufficient quantity to provide about 0.90 to about 1.10 blocked isocyanate groups for each hydroxy group in said molding powder. 14. A molded article in accordance with claim 13 wherein said monohydroxy ester comprises between about 30 and about 36 weight percent of said copolymer. 15. A molded article in accordance with claim 13 wherein said isocyanate triphenyl dimethylene triisocyanate. 16. A molded article in accordance with claim 13 wherein said isocyanate is 4,4'' - diphenyl methane diisocyanate. 17. A molded article in accordance with claim 13 wherein said copolymer has molecular weight in the range of about 6,000 to about 12,000 with less than 5 percent of the molecules thereof having molecular weight below about 1,000. 18. A molded article having glass transition temperature above about 90* C., tensile strength above about 7,000 psi, tensile modulus above about 400,000 psi, and tensile elongation-to-break above about 2 percent and formed from a molding powder which comprises an intimate mixture of (a) a copolymer consisting essentially of about 25 to about 40 weight percent of a monohydroxy ester of a C2 - C3 diol and acrylic or methacrylic acid and a remainder consisting essentially of a major proportion of methyl methacrylate and a minor proportion of methacrylonitrile and having average molecular weight in the range of about 3,000 to about 16,000, and (b) a caprolactam-blocked di- or tri- isocyanate, said isocyanate being present in sufficient quantity to provide about 0.90 to about 1.10 blocked isocyanate groups for each hydroxy group in said molding powder. 19. A molded article in accordance with claim 18 wherein said monohydroxy ester comprises between about 30 and about 36 weight percent of said copolymer and said copolymer has molecular weight in the range of about 6,000 to about 12,000 with less than 5 percent of the molecules thereof having molecular weight below about 1,000. 20. A molded article in accordance with claim 18 wherein said isocyanate is selected from 4,4'' - diphenyl methane diisocyanate and triphenyl dimethylene triisocyanate. |
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