US4500686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester type block copolymer composition
Assignee: Toyobo Co Ltd
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Filing: 1983-03-18
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Granted: 1985-02-19
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Expires: 2003-03-18
Abstract
Abstract An improved polyester type block copolymer composition having a rubber-like elasticity, particularly having excellent heat resistance and water resistance, which comprises a polyester type block copolymer produced from a crystalline aromatic polyester and a lactone in melt-admixture with at least one epoxy compound and optionally further with a carboxylic acid compound selected from an ethylene-carboxylic acid copolymer and an aliphatic carboxylic acid metal salt.
Inventors
- 👤 Takuma Kobayashi
- 👤 Hironobu Kitagawa
- 👤 Shigeo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:11
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4246; C08G59/4269; C08G59/4276; C08G63/00; C08G63/02; C08G63/60; C08G65/00; C08G65/02; C08G65/04
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
150 words
A polyester type block copolymer which comprises a polyester type block copolymer obtained from a crystalline aromatic polyester and a lactone in the ratio of 95/5 to 30/70 by weight, in melt-admixture with at least one epoxy compound, said epoxy compound being incorporated in an amount of 0.1 to 20% by weight based on the weight of the polyester type block copolymer, said epoxy compound being a member selected from the group consisting of mono-, di- and tri-functional epoxy compounds of the formula: ##STR3## wherein R 1 is a hydrocarbon group having 1 to 10 carbon atoms, R 2 is an alkylene group having 1 to 4 carbon atoms, R 3 is a divalent hydrocarbon group having 1 to 20 carbon atoms or --(R 2 O)m--R 2 --, R 4 is a trivalent hydrocarbon group having 3 to 20 carbon atoms, and m is an integer of 0 to 20.
Claim 2
Dependent Claim
150 words
A polyester type block copolymer which comprises a polyester type block copolymer obtained from a crystalline aromatic polyester and a lactone in the ratio of 95/5 to 30/70 by weight, in melt-admixture with at least one epoxy compound, said epoxy compound being incorporated in an amount of 0.1 to 20% by weight based on the weight of the polyester type block copolymer, said epoxy compound being a member selected from the group consisting of mono-, di- and tri-functional epoxy compounds of the formula: ##STR3## wherein R 1 is a hydrocarbon group having 1 to 10 carbon atoms, R 2 is an alkylene group having 1 to 4 carbon atoms, R 3 is a divalent hydrocarbon group having 1 to 20 carbon atoms or --(R 2 O)m--R 2 --, R 4 is a trivalent hydrocarbon group having 3 to 20 carbon atoms, and m is an integer of 0 to 20.
Claim 3
Dependent Claim
23 words
A composition according to claim 1, wherein the epoxy compound is a combination of a monoepoxy compound and a di- or tri-epoxy compound.
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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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |