US4436896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester copolymer
Assignee: Daicel Corp
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Filing: 1982-09-14
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Granted: 1984-03-13
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Expires: 2002-09-14
Abstract
Abstract A polyester copolymer, suitable for an adhesive, is obtained by copolymerizing (A) terephthalic acid or a mixture of more than 50 mol % of terephthalic acid and at least one kind of dicarboxylic acid selected from aromatic dicarboxylic acids excluding terephthalic acid and aliphatic dicarboxylic acids, (B) a low-molecular weight diol composed of 1 to 50 mol % of 2-methyl-1,3-propanediol and 99 to 50 mol % of 1,6-hexanediol, and (C) at least one kind of high-molecular weight diol (in such an amount that the high-molecular weight diol component in the copolymer is 0 to 60 wt %) selected from polyalkylene ether glycol and polycaprolactone glycol.
Inventors
- 👤 Ichiro Okamoto
- 👤 Yuzo Toga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:47
CPC Classifications
C; C09; C09J; C09J167/00; C08; C08G; C08G63/00; C08G63/02; C08G63/60; C08G63/66; C08G63/668; C08G63/672
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A polyester copolymer obtained by copolymerizing (A) terephthalic acid or a mixture of not less than 50 mol % of terephthalic acid and at least one kind of dicarboxylic acid selected from aromatic dicarboxylic acids excluding terephthalic acid and aliphatic dicarboxylic acids, said terephthalic acid and dicarboxylic acid optionally forming an ester-forming derivative thereof, (B) a low-molecular weight diol composed of 1 to 50 mol % of 2-methyl-1,3-propanediol and 99 to 50 mol % of 1,6-hexanediol, and (C) at least one kind of high-molecular weight diol (in such an amount that the high-molecular weight diol component in the copolymer is 0 to 60 wt %) selected from polyalkylene ether glycol and polycaprolactone glycol.
Claim 2
Dependent Claim
113 words
A polyester copolymer obtained by copolymerizing (A) terephthalic acid or a mixture of not less than 50 mol % of terephthalic acid and at least one kind of dicarboxylic acid selected from aromatic dicarboxylic acids excluding terephthalic acid and aliphatic dicarboxylic acids, said terephthalic acid and dicarboxylic acid optionally forming an ester-forming derivative thereof, (B) a low-molecular weight diol composed of 1 to 50 mol % of 2-methyl-1,3-propanediol and 99 to 50 mol % of 1,6-hexanediol, and (C) at least one kind of high-molecular weight diol (in such an amount that the high-molecular weight diol component in the copolymer is 0 to 60 wt %) selected from polyalkylene ether glycol and polycaprolactone glycol.
Claim 3
Dependent Claim
31 words
A polyester copolymer as claimed in claim 1 in which the component (A) comprises 55 to 99 mol % of terephthalic acid and 50 to 1 mol % of isophthalic acid.
Claim 4
Dependent Claim
35 words
A polyester copolymer as claimed in claim 1, in which the component (A) comprises 50 to 99 mol % of terephthalic acid and 50 to 1 mol % of one or more aliphatic dicarboxylic acids.
Claim 5
Independent Claim
27 words
A method of bonding an article to another article by using the polyester copolymer as defined in any of claims 1, 2 and 3, as an adhesive.
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) | 1987-03-13 | 1987-09-12 | 1988-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-13 | 1991-09-12 | 1992-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-13 | 1995-09-12 | 1996-03-13 | $7700.00 | Window Closed / Lapsed |