Patent US4661546A successfully refreshed from Google Patents.
US4661546A
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High impact polyethylene terephthalate polyblends
Assignee: Motors Liquidation Co
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Filing: 1985-05-09
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Granted: 1987-04-28
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Expires: 2005-05-09
Abstract
Abstract A high impact thermoplastic polyblend of a polyethylene terephthalate, a polyester elastomer, and an aromatic phosphite. The aromatic phosphite when added in amounts up to as much as about 5 percent by weight of the total polyblend composition causing grafting of the polyester elastomer onto the polyethylene terephthalate chains producing a thermoplastic polyblend composition having superior impact strength.
Inventors
- 👤 Ismat A. Abu-Isa
- 👤 Elio Eusebi
- 👤 Craig B. Jaynes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:46
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/524; C08K5/526; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A thermoplastic polyblend molding composition comprising an intimate admixture of: (a) 80 to 60% by weight of total polyblend composition of a polyethylene terephthalate produced by the condensation polymerization of dimethyl terephthalate and ethylene glycol, (b) 19 to 37% by weight of total polyblend composition of at least one polyester elastomer selected from the group consisting of a block copolymer of tetramethylene glycol and n-butyl terephthalate, and a block copolymer of n-butyl terephthalate and ethylene oxide/propylene oxide, (c) 1 to 3% by weight of total polyblend composition of triphenyl phosphite, the total of (a), (b), and (c) being equal to 100%, whereby said polyblend molding composition having an impact strength of at least about 60 Joules/meter as measured by the ASTM procedure D-256.
Claim 2
Dependent Claim
123 words
A thermoplastic polyblend molding composition comprising an intimate admixture of: (a) 80 to 60% by weight of total polyblend composition of a polyethylene terephthalate produced by the condensation polymerization of dimethyl terephthalate and ethylene glycol, (b) 19 to 37% by weight of total polyblend composition of at least one polyester elastomer selected from the group consisting of a block copolymer of tetramethylene glycol and n-butyl terephthalate, and a block copolymer of n-butyl terephthalate and ethylene oxide/propylene oxide, (c) 1 to 3% by weight of total polyblend composition of triphenyl phosphite, the total of (a), (b), and (c) being equal to 100%, whereby said polyblend molding composition having an impact strength of at least about 60 Joules/meter as measured by the ASTM procedure D-256.
References Cited (Backward Citations)
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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) | 1990-04-27 | 1990-10-27 | 1991-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-27 | 1994-10-27 | 1995-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-27 | 1998-10-27 | 1999-04-28 | $7700.00 | Window Closed / Lapsed |