Patent US4292233A successfully refreshed from Google Patents.
US4292233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-impact polybutylene terephthalate
Assignee: Bayer AG
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Filing: 1980-07-02
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Granted: 1981-09-29
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Expires: 2000-07-02
Abstract
Abstract The toughness of polybutylene terephthalate can be considerably improved by the addition of an ABS-graft copolymer having a relatively high content of graft base and a closely defined particle size; the typical properties of polybutylene terephthalate, such as its high dimensional heat stability, hardness and rigidity, are not substantially reduced. The products show an excellent multiaxial impact strength.
Inventors
- 👤 Rudolf Binsack
- 👤 Dieter Rempel
- 👤 Gert Humme
- 👤 Karl-Heinz Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:10
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
167 words
Mixtures of A. from 65 to 99% by weight of polybutylene terephthalate, and B. from 1 to 35% by weight of ABS graft polymer, the above percentages being based on the sum of A+B and the graft polymer B being obtainable by grafting I. from 10 to 40% by weight, based on B, of a mixture of (a) from 10 to 35% by weight, based on the sum of a+b, of acrylonitrile, and (b) from 65 to 90% by weight, based on the sum of a+b, of styrene onto II. from 60 to 90% by weight, based on B, of cross-linked butadiene polymer containing at least 70% by weight, based on II, of butadiene residues as the graft base, characterised in that the gel content of graft base II amounts to at least 70% (as measured in toluene), the degree of grafting G is from 0.15 to 0.55 and the average particle diameter d 50 of the ABS graft polymer B is from 0.2 to 0.6 μm.
Claim 2
Dependent Claim
167 words
Mixtures of A. from 65 to 99% by weight of polybutylene terephthalate, and B. from 1 to 35% by weight of ABS graft polymer, the above percentages being based on the sum of A+B and the graft polymer B being obtainable by grafting I. from 10 to 40% by weight, based on B, of a mixture of (a) from 10 to 35% by weight, based on the sum of a+b, of acrylonitrile, and (b) from 65 to 90% by weight, based on the sum of a+b, of styrene onto II. from 60 to 90% by weight, based on B, of cross-linked butadiene polymer containing at least 70% by weight, based on II, of butadiene residues as the graft base, characterised in that the gel content of graft base II amounts to at least 70% (as measured in toluene), the degree of grafting G is from 0.15 to 0.55 and the average particle diameter d 50 of the ABS graft polymer B is from 0.2 to 0.6 μm.
Claim 3
Dependent Claim
30 words
Mixtures as claimed in claim 1, characterised in that the mixtures consist of from 70 to 98% by weight of A and from 2 to 30% by weight of B.
Claim 4
Dependent Claim
30 words
Mixtures as claimed in claim 1, characterised in that the mixtures consist of from 75 to 97% by weight of A and from 3 to 25% by weight of B.
Claim 5
Dependent Claim
34 words
Mixtures as claimed in claim 1, characterised in that the graft polymer B is obtainable by grafting from 10 to 35% by weight of I onto from 65 to 90% by weight of II.
Claim 6
Dependent Claim
34 words
Mixtures as claimed in claim 1, characterised in that the graft polymer B is obtainable by grafting from 15 to 25% by weight of I onto from 75 to 85% by weight of II.
Claim 7
Dependent Claim
32 words
Mixtures as claimed in claim 1, characterised in that from 20 to 35% by weight of the graft monomers I consist of acrylonitrile and from 65 to 80% by weight of styrene.
Claim 8
Dependent Claim
26 words
Mixtures as claimed in claim 1, characterised in that the gel content of the graft base II amounts to at least 80% (as measured in toluene).
Claim 9
Dependent Claim
26 words
Mixtures as claimed in claim 1, characterised in that the graft polymer B has an average particle diameter d 50 of from 0.3 to 0.5 μm.
Claim 10
Dependent Claim
24 words
Mixtures as claimed in claim 1, characterised in that the graft polymer B has an average particle diameter d 50 of approximaely 0.4 μm.
Claim 11
Dependent Claim
26 words
Mixtures as claimed in claim 1, characterised in that they contain 5 to 50% by weight of glass fibers, based on the sum of A+B+glass fibers.
References Cited (Backward Citations)
US3919353A
Cited
US4080354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |