US4369282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified polyester compositions
Assignee: Morton Coatings Inc
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Filing: 1980-12-19
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Granted: 1983-01-18
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Expires: 2000-12-19
Abstract
Abstract Modified thermoplastic polyester compositions are provided which comprise (a) a poly(1,4-butylene terephthalate) resin or polyester copolymer and, optionally, a poly(ethylene terephthalate) resin and (b) a modifier therefor comprising a combination of a polyacrylate resin or a vinyl aromatic-diene block copolymer resin and a poly(1,3-butylene terephthalate), and, optionally (c) filler and/or reinforcing agent and/or (d) a flame retardant or combination of flame retardants. Modifier (b) provides enhanced resistance to impact fracture in articles molded from the compositions.
Inventors
- 👤 Richard W. Campbell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:50
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
152 words
A thermoplastic composition comprising: (a) a polyester composition comprising: (i) a poly(1,4-butylene terephthalate) resin; (ii) a blend of a poly(1,4-butylene terephthalate resin and a poly(ethylene terephthalate) resin; (iii) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (iv) a blend of (iii) and a poly(ethylene terephthalate) resin; or (v) a blend of (iii) and a poly(1,4-butylene terephthalate) resin; (b) an impact modifier therefor comprising a combination of: (i) a polyacrylate resin or a vinyl aromaticdiene block copolymer resin; and (ii) a poly(1,3-butylene terephthalate) resin, in an amount of up to 60 parts per 100 parts by weight of (a) and (b) together; and (c) a component selected from the group consisting essentially of fillers, reinforcing agents and mixtures of the two, said component being present in an amount of from about 1 to about 60 parts by weight per 100 parts by weight of (a), (b) and (c) together.
Claim 2
Dependent Claim
152 words
A thermoplastic composition comprising: (a) a polyester composition comprising: (i) a poly(1,4-butylene terephthalate) resin; (ii) a blend of a poly(1,4-butylene terephthalate resin and a poly(ethylene terephthalate) resin; (iii) a block copolyester of poly(1,4-butylene terephthalate) and an aromatic/aliphatic or aliphatic polyester; (iv) a blend of (iii) and a poly(ethylene terephthalate) resin; or (v) a blend of (iii) and a poly(1,4-butylene terephthalate) resin; (b) an impact modifier therefor comprising a combination of: (i) a polyacrylate resin or a vinyl aromaticdiene block copolymer resin; and (ii) a poly(1,3-butylene terephthalate) resin, in an amount of up to 60 parts per 100 parts by weight of (a) and (b) together; and (c) a component selected from the group consisting essentially of fillers, reinforcing agents and mixtures of the two, said component being present in an amount of from about 1 to about 60 parts by weight per 100 parts by weight of (a), (b) and (c) together.
Claim 3
Dependent Claim
15 words
A thermoplastic composition as defined in claim 1 wherein component (c) comprises (c)(i) fibrous glass.
Claim 4
Dependent Claim
20 words
A thermoplastic composition as defined in claim 2 wherein component (c)(i) comprises fibrous glass pre-dispersed in said polyester component (a).
Claim 5
Dependent Claim
15 words
A composition as defined in claim 1 wherein component (c) comprises (ii) a mineral filler.
Claim 6
Dependent Claim
13 words
A composition as defined in claim 4 wherein component (c)(ii) comprises a clay.
Claim 7
Dependent Claim
19 words
A composition as defined in claim 1 which also includes (d) a flame-retardant amount of a flame retarding agent.
Claim 8
Dependent Claim
14 words
A composition as defined in claim 6 wherein component (c) comprises (i) fibrous glass.
Claim 9
Dependent Claim
15 words
A composition as defined in claim 6 wherein component (c) comprises (ii) a mineral filler.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-17 | 1986-07-19 | 1987-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-17 | 1990-07-19 | 1991-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-17 | 1994-07-19 | 1995-01-18 | $7700.00 | Window Closed / Lapsed |