Patent US2590929A successfully refreshed from Google Patents.
US3907751A
Expired / Lapsed
US
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Moulding composition
Assignee: Imperial Chemical Industries Ltd
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Filing: 1972-10-27
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Granted: 1975-09-23
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Expires: 1992-10-27
Abstract
Abstract 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.
Inventors
- 👤 Michael Horace Knight
- 👤 Barbara Mitchell
- 👤 Maurice James Ratcliffe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:55
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/30; C08G18/32; C08G18/3203; C08G18/3215; C08G18/40; C08G18/48; C08G18/487; C08G18/4879; C08G2140/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
11 words
A MOULDING COMPOSITION COMPRISING A POLYMERISABLE VINYL-ENDED COMPOUND HAVING THE STRUCTURE:
Claim 2
Dependent Claim
11 words
A MOULDING COMPOSITION COMPRISING A POLYMERISABLE VINYL-ENDED COMPOUND HAVING THE STRUCTURE:
Claim 3
Dependent Claim
13 words
A moulding composition as claimed in calim 1 which is in particulate form.
Claim 4
Dependent Claim
38 words
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.
Claim 5
Dependent Claim
26 words
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.
Claim 6
Dependent Claim
26 words
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.
Claim 7
Dependent Claim
26 words
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.
Claim 8
Dependent Claim
68 words
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.
Claim 9
Dependent Claim
68 words
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.
Claim 10
Dependent Claim
20 words
A moulding composition as claimed in claim 1 in which in the vinyl-ended compound n is not greater than 10.
Claim 11
Dependent Claim
29 words
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.
Claim 12
Dependent Claim
20 words
A moulding composition as claimed in claim 1 in which in the vinyl-ended compound the group R1 has the structure
Claim 13
Dependent Claim
40 words
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.
Claim 14
Dependent Claim
13 words
A moulding composition as claimed in claim 12 in which in the group,
Claim 15
Dependent Claim
19 words
A moulding composition as claimed in claim 1 in which in the vinyl-ended compound the group R3 is methyl.
Claim 16
Dependent Claim
17 words
A shaped polymeric article produced by shaping and polymerising a moulding composition as claimed in claim 1.
References Cited (Backward Citations)
US3598866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |