US4396742A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester moulding compositions having improved toughness
Assignee: Bayer AG
•
Filing: 1981-10-09
•
Granted: 1983-08-02
•
Expires: 2001-10-09
Abstract
Abstract Grafted polyacrylates having a specific composition improve the impact strength under multi-axial stress of thermoplastic polyesters.
Inventors
- 👤 Rudolf Binsack
- 👤 Christian Lindner
- 👤 Dieter Rempel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:57
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
Thermoplastic polyester moulding composition of (A) from 65 to 99% by weight, based on component (A) plus (B), of a saturated polyester of an aromatic dicarboxylic acid and an aliphatic or cycloaliphatic diol and (B) from 1 to 35% by weight, based on components (A) plus (B), of a graft product consisting of (I) from 5 to 55% by weight, based on components (I) and (II), of at least one monomer selected from the group consisting of styrene, acrylonitrile and methyl methacrylate grafted on (II) from 45 to 95% by weight, based on components (I) and (II) of an elastomer as a graft base characterized in that the elastomer (II) is obtained by the cross-linking copolymerization of a mixture consisting of from 99.01 to 99.95% by weight, based on elastomer (II) of an acrylic ester of a C 1 -C 8 -alcohol and from 0.05 to 0.99% by weight, based on elastomer (II) of a cyclic monomeric compound selected from the group consisting of triallyl cyanurate and triallyl isocyanurate.
Claim 2
Dependent Claim
169 words
Thermoplastic polyester moulding composition of (A) from 65 to 99% by weight, based on component (A) plus (B), of a saturated polyester of an aromatic dicarboxylic acid and an aliphatic or cycloaliphatic diol and (B) from 1 to 35% by weight, based on components (A) plus (B), of a graft product consisting of (I) from 5 to 55% by weight, based on components (I) and (II), of at least one monomer selected from the group consisting of styrene, acrylonitrile and methyl methacrylate grafted on (II) from 45 to 95% by weight, based on components (I) and (II) of an elastomer as a graft base characterized in that the elastomer (II) is obtained by the cross-linking copolymerization of a mixture consisting of from 99.01 to 99.95% by weight, based on elastomer (II) of an acrylic ester of a C 1 -C 8 -alcohol and from 0.05 to 0.99% by weight, based on elastomer (II) of a cyclic monomeric compound selected from the group consisting of triallyl cyanurate and triallyl isocyanurate.
Claim 3
Dependent Claim
27 words
Thermoplastic polyester moulding compositions as claimed in claim 1, characterised in that the cyclic monomer of elastomer (II) contains three unsaturated groups polymerizing at the same velocity.
Claim 4
Dependent Claim
32 words
Thermoplastic polyester moulding compositions as claimed in claim 1, characterised in that the graft monomers (I) are mixtures of styrene and acrylonitrile in a ratio by weight of from 90:10 to 50:50.
Claim 5
Dependent Claim
16 words
Thermoplastic moulding compositions as claimed in claim 1, characterised in that the polyester is polyethylene terephthalate.
Claim 6
Dependent Claim
17 words
Thermoplastic polyester moulding compositions as claimed in claim 1, characterised in that the polyester is poly-(1,4-butylene terephthalate).
Claim 7
Dependent Claim
24 words
Thermoplastic polyester moulding compositions as claimed in claim 1, characterised in that the moulding compositions contain up to 60% by weight of glass fibres.
Claim 8
Dependent Claim
39 words
Thermoplastic polyester moulding compositions as claimed in 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)
US3925510A
Cited
US4081422A
Cited
US4283326A
Cited
US4267286A
Cited
US4254011A
Cited
US4342846A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |