Moulding composition |
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| 申请号 | US30133172 | 申请日 | 1972-10-27 | 公开(公告)号 | US3907751A | 公开(公告)日 | 1975-09-23 |
| 申请人 | ICI LTD; | 发明人 | KNIGHT MICHAEL HORACE; MITCHELL BARBARA; RATCLIFFE MAURICE JAMES; | ||||
| 摘要 | Moulding composition in particulate form comprising at least one prepolymer containing urethane groups and having the structure and hereinafter referred to as the vinyl-ended prepolymer, in which R1 and R2 are each divalent organic groups at least one of which contains at least one cyclic group in the chain and are such that in said structure there are not more than 20 atoms in the chain between each cyclic group, n is a whole number of from 1 to 20, and when n is one and only R2 contains a cyclic group in the chain there are no more than 20 atoms in the chain between the cyclic group in R2 and the nitrogen atom attached to the group X, R3 is hydrogen or a hydrocarbyl group and X is a divalent group are useful in forming articles such as films. |
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| 权利要求 | 1. A MOULDING COMPOSITION COMPRISING A POLYMERISABLE VINYL-ENDED COMPOUND HAVING THE STRUCTURE: 2. A moulding composition as claimed in calim 1 which is in particulate form. 3. A moulding composition as claimed in claim 1 in which, in the divalent group having the structure II in the vinyl-ended compound R6 and R7, are hydrogen atoms and R4 and R5 are hydrogen atoms or alkyl groups. 4. A moulding composition as claimed in claim 3 in which one of R4 and R5 is a hydrogen atom and the other is a methyl group. 5. A moulding composition as claimed in claim 1 in which the composition includes at least one free-radical generator capable of initiating polymerisation of the vinyl-ended compound. 6. A moulding composition as claimed in claim 5 which contains from 0.01 to 5% of free-radical generator by weight of the vinyl-ended compound in the composition. 7. A moulding composition as claimed in claim 1 in which in the vinyl-ended compound there are not more than 20 atoms in the chain between adjacent cyclic groups and when n is one and only R2 contains a cyclic group in the chain there are not more than 20 atoms in the chain between the cyclic group in R2 and the nitrogen atom attached to the group X. 8. A moulding composition as claimed in claim 7 in which in the vinyl-ended compound there are not more than 9 atoms in the chain between adjacent cyclic groups and when n is one and only R2 contains a cyclic group in the chain there are not more than 9 atoms in the chain between the cyclic group in R2 and the nitrogen atom attached to the group X. 9. A moulding composition as claimed in claim 1 in which in the vinyl-ended compound n is not greater than 10. 10. A moulding composition as claimed in claim 1 in which in the vinyl-ended compound the group R1 contains at least one cyclic group in the chain of the compound. 11. A moulding composition as claimed in claim 1 in which in the vinyl-ended compound the group R1 has the structure 12. A moulding composition as claimed in claim 1 in which the composition contains at least one copolymerisable vinyl monomer, other than the vinyl-ended compound, in an amount of less than 5% by weight of the vinyl-ended compound in the composition. 13. A moulding composition as claimed in claim 12 in which in the group, 14. A moulding composition as claimed in claim 1 in which in the vinyl-ended compound the group R3 is methyl. 15. A shaped polymeric article produced by shaping and polymerising a moulding composition as claimed in claim 1. |
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