US4417026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester moulding compositions having improved toughness
Assignee: Bayer AG
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Filing: 1981-10-09
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Granted: 1983-11-22
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Expires: 2001-10-09
Abstract
Abstract Graft copolymers having a diene rubber core surrounded by at least two different shells improve the impact strength under multi-axial stress of thermoplastic polyester moulding compositions.
Inventors
- 👤 Christian Lindner
- 👤 Rudolf Binsack
- 👤 Dieter Rempel
- 👤 Karl-Heinz Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:21
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
Thermoplastic polyester moulding compositions composed of: (A) from 60 to 99%, by weight, (based on (A)+(B)) of at least one saturated polyester of an aromatic dicarboxylic acid and an aliphatic or cycloaliphatic diol; and (B) from 1 to 40%, by weight, (based on (A)+(B)) of a granular graft product composed of: (I) a cross-linked diene rubber as core; (II) a cross-linked acrylate rubber as first shell; and (III) a polymer or copolymer of resin-forming monomers selected from the group consisting of styrene, α-methyl styrene, acrylonitrile, methacrylonitrile, acrylic acid ester, methacrylic acid ester and mixtures thereof as second shell.
Claim 2
Dependent Claim
98 words
Thermoplastic polyester moulding compositions composed of: (A) from 60 to 99%, by weight, (based on (A)+(B)) of at least one saturated polyester of an aromatic dicarboxylic acid and an aliphatic or cycloaliphatic diol; and (B) from 1 to 40%, by weight, (based on (A)+(B)) of a granular graft product composed of: (I) a cross-linked diene rubber as core; (II) a cross-linked acrylate rubber as first shell; and (III) a polymer or copolymer of resin-forming monomers selected from the group consisting of styrene, α-methyl styrene, acrylonitrile, methacrylonitrile, acrylic acid ester, methacrylic acid ester and mixtures thereof as second shell.
Claim 3
Dependent Claim
29 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the ratio of core (I) to the first shell (II) is from 0.1:99.9 to 80:20 parts, by weight.
Claim 4
Dependent Claim
31 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the proportion of the second shell (III) to the total graft product (B) is from 10 to 80%, by weight.
Claim 5
Dependent Claim
22 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the second shell (III) consists of mixtures of styrene and acrylonitrile.
Claim 6
Dependent Claim
19 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the second shell (III) consists of methyl methacrylate.
Claim 7
Dependent Claim
27 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the first shell (II) is cross-linked with cyclic monomers containing at least three ethylenically unsaturated groups.
Claim 8
Dependent Claim
15 words
Thermoplastic moulding compositions according to claim 1, characterised in that the polyester is polyethylene terephthalate.
Claim 9
Dependent Claim
15 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the polyester is poly(1,4-butylene-terephthalate).
Claim 10
Dependent Claim
23 words
Thermoplastic polyester moulding compositions according to claim 1, characterised in that the moulding compositions contain up to 60%, by weight, of glass fibres.
Claim 11
Dependent Claim
38 words
Thermoplastic polyester moulding compositions according to claim 1, characterized in that the polyester is a mixture comprising (a) from 1 to 99% by weight of polyethylene terephthalate and (b) from 99 to 1% by weight of poly-(butane-1.4-diol terephthalate.
References Cited (Backward Citations)
US4034013A
Cited
US4283326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |