Patent US4584353A successfully refreshed from Google Patents.
US4584353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester block copolymer composition
Assignee: Toyobo Co Ltd
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Filing: 1984-10-15
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Granted: 1986-04-22
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Expires: 2004-10-15
Abstract
Abstract An improved polyester block copolymer composition having a rubber-like elasticity, particularly having excellent moldability, impact resistance, heat resistance and water resistance, which comprises a polyester block copolymer produced from a crystalline aromatic polyester and a lactone in melt-admixture with a polytetramethylene terephthalate and optionally further with at least one epoxy compound.
Inventors
- 👤 Takuma Kobayashi
- 👤 Hironobu Kitagawa
- 👤 Chikara Sugitawa
- 👤 Shigeo Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:16
CPC Classifications
C; C08; C08L; C08L63/00; C08K; C08K5/00; C08K5/04; C08K5/15
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
A polyester block copolymer composition which comprises (a) 2 to 95 parts by weight of a polyester block copolymer obtained by reacting a crystalline aromatic polyester and a monomeric lactone in a weight ratio ranging from 95/5 to 5/95 and (b) 98 to 5 parts by weight of a polytetramethylene terephthalate, and (c) wherein a mono- or more functional epoxy compound is incorporated in an amount of 0.2 to 10% by weight based on the total weight of the composition.
Claim 2
Dependent Claim
80 words
A polyester block copolymer composition which comprises (a) 2 to 95 parts by weight of a polyester block copolymer obtained by reacting a crystalline aromatic polyester and a monomeric lactone in a weight ratio ranging from 95/5 to 5/95 and (b) 98 to 5 parts by weight of a polytetramethylene terephthalate, and (c) wherein a mono- or more functional epoxy compound is incorporated in an amount of 0.2 to 10% by weight based on the total weight of the composition.
Claim 3
Dependent Claim
24 words
A polyester block copolymer composition as recited in claim 1 wherein the polyester block copolymer is obtained by reacting polytetramethylene terephthalate and monomeric ε-caprolactone.
Claim 4
Dependent Claim
92 words
A polyester block copolymer composition which comprises (a) 2 to 95 parts by weight of a polyester block copolymer obtained by reacting a crystalline aromatic polyester and a monomeric lactone in a weight ratio ranging from 95/5 to 5/95 and (b) 98 to 5 parts by weight of a polytetramethylene terephthalate, and (c) wherein a mono-functional epoxy compound and a di- or more functional epoxy compound are incorporated in an amount of 0.1 to 5% by weight and 0.1 to 9.9% by weight, respectively, based on the total weight of the composition.
Claim 5
Dependent Claim
92 words
A polyester block copolymer composition which comprises (a) 2 to 95 parts by weight of a polyester block copolymer obtained by reacting a crystalline aromatic polyester and a monomeric lactone in a weight ratio ranging from 95/5 to 5/95 and (b) 98 to 5 parts by weight of a polytetramethylene terephthalate, and (c) wherein a mono-functional epoxy compound and a di- or more functional epoxy compound are incorporated in an amount of 0.1 to 5% by weight and 0.1 to 9.9% by weight, respectively, based on the total weight of the composition.
Claim 6
Dependent Claim
24 words
A composition according to claim 3, wherein the mono-functional epoxy compound is phenyl glycidyl ether and the di-functional epoxy compound is diethylene diglycidyl ether.
Claim 7
Dependent Claim
24 words
A polyester block copolymer composition as recited in claim 4 wherein the polyester block copolymer is obtained by reacting polytetramethylene terephthalate and monomeric ε-caprolactone.
References Cited (Backward Citations)
US2863855A
Cited
US3869427A
Cited
US3560605A
Cited
US4016142A
Cited
US3657191A
Cited
US3886104A
Cited
US3907926A
Cited
US4031165A
Cited
US4011285A
Cited
US4144285A
Cited
US4130541A
Cited
US4222928A
Cited
US4315882A
Cited
US4229553A
Cited
US4246378A
Cited
GB2039510A
Cited
US4374960A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |