Patent US3985828A successfully refreshed from Google Patents.
US3985828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retarded acrylic multipolymer-vinyl chloride polymer compositions
Assignee: Wyeth Holdings LLC
•
Filing: 1975-06-24
•
Granted: 1976-10-12
•
Expires: 1995-06-24
Abstract
Abstract Acrylic multipolymer-vinyl chloride polymer compositions are rendered flame-retardant by the incorporation therein of dicyclopentadienyl iron or chromium acetyl acetonate.
Inventors
- 👤 Howard Robert Lucas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:48
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08K; C08K5/00; C08K5/0091; C08K5/04; C08K5/09; C08K5/56; C08K5/57; C08K5/58; C08L33/00; C08L33/04; C08L33/06; C08L33/10; C08L33/12; C08L51/00; C08L51/04; C08L55/00; C08L55/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A composition of matter comprising (1) a mixture of from about 40 to about 95 percent, by weight, of a polymeric material comprising (a) from about 70 to about 95 percent, by weight, of a terpolymer of 65-75 parts of methyl methacrylate, 15-25 parts of styrene and 1-15 parts of acrylonitrile and (b) from about 5 to about 30 percent, by weight, of polybutadiene grafted with 65-80 parts of methyl methacrylate, 15-25 parts of styrene and 1-15 parts of acrylonitrile, (2) from about 5 to about 60 percent, by weight, of a thermoplastic, non-cross-linked vinyl chloride polymer and (3) a stabilizing amount of an additive comprising (A) a compound having the formula RxSn(SR').sub.4-x wherein x is 1-3, inclusive, R is alkyl, aralkyl, alkaryl, or aryl, R' is the same as R or may include a carboxylic acid residue or a carboxylic acid ester residue, or (B) a barium-cadmium complex, containing (4) from about 0.025 to about 5.0 percent, by weight, based on the total weight of said composition, of dicyclopentadienyl iron or chromium acetyl acetonate.
Claim 2
Dependent Claim
175 words
A composition of matter comprising (1) a mixture of from about 40 to about 95 percent, by weight, of a polymeric material comprising (a) from about 70 to about 95 percent, by weight, of a terpolymer of 65-75 parts of methyl methacrylate, 15-25 parts of styrene and 1-15 parts of acrylonitrile and (b) from about 5 to about 30 percent, by weight, of polybutadiene grafted with 65-80 parts of methyl methacrylate, 15-25 parts of styrene and 1-15 parts of acrylonitrile, (2) from about 5 to about 60 percent, by weight, of a thermoplastic, non-cross-linked vinyl chloride polymer and (3) a stabilizing amount of an additive comprising (A) a compound having the formula RxSn(SR').sub.4-x wherein x is 1-3, inclusive, R is alkyl, aralkyl, alkaryl, or aryl, R' is the same as R or may include a carboxylic acid residue or a carboxylic acid ester residue, or (B) a barium-cadmium complex, containing (4) from about 0.025 to about 5.0 percent, by weight, based on the total weight of said composition, of dicyclopentadienyl iron or chromium acetyl acetonate.
Claim 3
Dependent Claim
19 words
A composition of matter according to claim 1 wherein (2) has an inherent viscosity of at least about 0.50.
Claim 4
Dependent Claim
16 words
A composition of matter according to claim 1 wherein said vinyl chloride polymer is polyvinyl chloride.
Claim 5
Dependent Claim
22 words
A composition of matter according to claim 1 wherein said vinyl chloride polymer is a copolymer of vinyl chloride and vinylidene chloride.
Claim 6
Dependent Claim
13 words
A composition of matter according to claim 1 wherein (4) is dicyclopentadienyl iron.
Claim 7
Dependent Claim
14 words
A composition of matter according to claim 1 wherein (4) is chromium acetyl acetonate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |