US4485212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact resistant blend of polybutylene terephthalate resin and OSA graft copolymer
Assignee: Uniroyal Chemical Co Inc
•
Filing: 1983-05-27
•
Granted: 1984-11-27
•
Expires: 2003-05-27
Abstract
Abstract Blend of polybutylene terephthalate resin and a graft copolymer of styrene and acrylonitrile on olefin copolymer rubber (e.g., EPDM) has high impact strength, provided the blend contains at least 25% of the graft.
Inventors
- 👤 John M. Wefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:29
CPC Classifications
C; C08; C08L; C08L51/00; C08L51/06; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
An impact resistant blend comprising a mixture of (A) poly(1,4-butylene terephthalate) resin, and (B) a graft copolymer of (a) styrene and acrylonitrile on (b) an ethylene-propylene-non-conjugated diene terpolymer rubber spine, the amount of (B) being from 25 to 55% by weight based on the total weight of (A) and (B), the amount of (a) in the graft copolymer being from 35 to 60% by weight based on the weight of (a) plus (b), and the ratio of styrene to acrylonitrile being in the range from 90:10 to 60:40 by weight, the said graft copolymer (B) being an inverted composition in which the rubber (b) is a discontinuous phase.
Claim 2
Dependent Claim
108 words
An impact resistant blend comprising a mixture of (A) poly(1,4-butylene terephthalate) resin, and (B) a graft copolymer of (a) styrene and acrylonitrile on (b) an ethylene-propylene-non-conjugated diene terpolymer rubber spine, the amount of (B) being from 25 to 55% by weight based on the total weight of (A) and (B), the amount of (a) in the graft copolymer being from 35 to 60% by weight based on the weight of (a) plus (b), and the ratio of styrene to acrylonitrile being in the range from 90:10 to 60:40 by weight, the said graft copolymer (B) being an inverted composition in which the rubber (b) is a discontinuous phase.
Claim 3
Dependent Claim
126 words
An impact resistant blend comprising a mixture of (A) poly(1,4-butylene terephthalate) resin, and (B) a graft copolymer of (a) styrene and acrylonitrile on (b) an ethylene-propylene-non-conjugated diene terpolymer rubber spine, the amount of (B) being from 25 to 55% by weight based on the total weight of (A) and (B), the amount of (a) in the graft copolymer being from 35 to 60% by weight based on the weight of (a) plus (b), and the ratio of styrene to acrylonitrile being in the range from 90:10 to 60:40 by weight, the said graft copolymer (B) having been first worked under shearing and fluxing conditions in the absence of (A) to form an inverted composition in which (b) is a discontinuous phase, prior to blending with (A).
Claim 4
Dependent Claim
126 words
An impact resistant blend comprising a mixture of (A) poly(1,4-butylene terephthalate) resin, and (B) a graft copolymer of (a) styrene and acrylonitrile on (b) an ethylene-propylene-non-conjugated diene terpolymer rubber spine, the amount of (B) being from 25 to 55% by weight based on the total weight of (A) and (B), the amount of (a) in the graft copolymer being from 35 to 60% by weight based on the weight of (a) plus (b), and the ratio of styrene to acrylonitrile being in the range from 90:10 to 60:40 by weight, the said graft copolymer (B) having been first worked under shearing and fluxing conditions in the absence of (A) to form an inverted composition in which (b) is a discontinuous phase, prior to blending with (A).
Claim 5
Dependent Claim
30 words
An impact resistant blend as in claim 2 in which the amount of (a) in the graft copolymer is 50% by weight based on the weight of (a) plus (b).
Claim 6
Dependent Claim
19 words
An impact resistant blend as in claim 3 in which the styrene to acrylonitrile ratio is 72:28, by weight.
Claim 7
Independent Claim
131 words
A method of making an impact resistant blend comprising a mixture of (A) poly(1,4-butylene terephthalate) resin, and (B) a graft copolymer of (a) styrene and acrylonitrile on (b) an ethylene-propylene-non-conjugated diene terpolymer rubber spine, the amount of (B) being from 25 to 55% by weight based on the total weight of (A) and (B), the amount of (a) in the graft copolymer being from 35 to 60% by weight based on the weight of (a) plus (b), and the ratio of styrene to acrylonitrile being in the range from 90:10 to 60:40 by weight, in which method the graft copolymer (B) is first worked under shearing and fluxing conditions in the absence of (A) to form an inverted composition in which (b) is a discontinuous phase, prior to blending with (A).
Claim 8
Independent Claim
131 words
A method of making an impact resistant blend comprising a mixture of (A) poly(1,4-butylene terephthalate) resin, and (B) a graft copolymer of (a) styrene and acrylonitrile on (b) an ethylene-propylene-non-conjugated diene terpolymer rubber spine, the amount of (B) being from 25 to 55% by weight based on the total weight of (A) and (B), the amount of (a) in the graft copolymer being from 35 to 60% by weight based on the weight of (a) plus (b), and the ratio of styrene to acrylonitrile being in the range from 90:10 to 60:40 by weight, in which method the graft copolymer (B) is first worked under shearing and fluxing conditions in the absence of (A) to form an inverted composition in which (b) is a discontinuous phase, prior to blending with (A).
Claim 9
Dependent Claim
28 words
A method as in claim 5 in which the amount of (a) in the graft copolymer is 50% by weight based on the weight of (a) plus (b).
Claim 10
Dependent Claim
17 words
A method as in claim 6 in which the styrene to acrylonitrile ratio is 72:28, by weight.
References Cited (Backward Citations)
US3919353A
Cited
US3864428A
Cited
US4022748A
Cited
US4202948A
Cited
US4260690A
Cited
US4292233A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |