US4396746A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyester copolymer
Assignee: Daicel Corp
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Filing: 1982-04-06
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Granted: 1983-08-02
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Expires: 2002-04-06
Abstract
Abstract A thermoplastic polyester copolymer comprises units derived from (A) terephthalic acid, a diol mixture of (B-1) 60 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 40 mol % of 1,4-cyclohexanedimethanol, or (B-2) 5 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 95 mol % of tetramethyleneglycol, and (C) 5 to 50 wt. %, based on the copolymer, of a polyalkylene ether glycol phthalate having a number-average molecular weight of 500 to 3000 in the polyalkylene ether glycol block thereof.
Inventors
- 👤 Yuzo Toga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:04
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
161 words
A thermoplastic polyester copolymer which comprises polyester recurring unis prepared by reacting (A) a dicarboxylic acid component consisting essentially of 50 to 100 mol % of terephthalic acid or lower alkylester thereof and 0 to 50 mol % of isophthalic acid or lower alkyl ester thereof, and (B) a diol component selected from the group consisting of (B-1) a mixture consisting essentially of 60 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 40 mol % of 1,4-cyclohexane dimethanol, and (B-2) a mixture consisting essentially of 5 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 95 mol % of tetramethylene glycol, and polyether recurring units prepared by reacting said dicarboxylic acid component (A) with (C) a polyalkylene ether glycol having a number-average molecular weight of 500 to 3000, wherein the amount of said polyether recurring units is from 5 to 50 wt. %, based on the sum of the weights of said polyester recurring units and said polyether recurring units.
Claim 2
Dependent Claim
161 words
A thermoplastic polyester copolymer which comprises polyester recurring unis prepared by reacting (A) a dicarboxylic acid component consisting essentially of 50 to 100 mol % of terephthalic acid or lower alkylester thereof and 0 to 50 mol % of isophthalic acid or lower alkyl ester thereof, and (B) a diol component selected from the group consisting of (B-1) a mixture consisting essentially of 60 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 40 mol % of 1,4-cyclohexane dimethanol, and (B-2) a mixture consisting essentially of 5 to 95 mol % of 2-methyl-1,3-propanediol and 5 to 95 mol % of tetramethylene glycol, and polyether recurring units prepared by reacting said dicarboxylic acid component (A) with (C) a polyalkylene ether glycol having a number-average molecular weight of 500 to 3000, wherein the amount of said polyether recurring units is from 5 to 50 wt. %, based on the sum of the weights of said polyester recurring units and said polyether recurring units.
Claim 3
Dependent Claim
15 words
A copolymer as claimed in claim 1 wherein said diol component (B) consists of (B-1).
Claim 4
Dependent Claim
15 words
A copolymer as claimed in claim 1 wherein said diol component (B) consists of (B-2).
Claim 5
Dependent Claim
77 words
A thermoplastic polyester copolymer consisting essentially of irregularly distributed recurring units A, B, C, D, E and F having the formulas: ##STR3## wherein R is alkyl having 2 to 6 carbon atoms and n is a positive integer such that -RO) n has a molecular weight of 500-3000, and wherein the mole percent ratio of (A+B+C)/(D+E+F)=50-100/0-50, the mole percent ratio of (A+D)/(B+E)=60-95/5-40 and the weight of (C+F) is from 5 to 50% of the weight of (A+B+C+D+E+F).
Claim 6
Dependent Claim
77 words
A thermoplastic polyester copolymer consisting essentially of irregularly distributed recurring units A, B, C, D, E and F having the formulas: ##STR3## wherein R is alkyl having 2 to 6 carbon atoms and n is a positive integer such that -RO) n has a molecular weight of 500-3000, and wherein the mole percent ratio of (A+B+C)/(D+E+F)=50-100/0-50, the mole percent ratio of (A+D)/(B+E)=60-95/5-40 and the weight of (C+F) is from 5 to 50% of the weight of (A+B+C+D+E+F).
Claim 7
Dependent Claim
77 words
A thermoplastic polyester copolymer consisting essentially of irregularly distributed recurring units A, B, C, D, E and F having the formulas: ##STR4## wherein R is alkyl having 2 to 6 carbon atoms and n is a positive integer such that -RO) n has a molecular weight of 500-3000, and wherein the mole percent ratio of (A+B+C)/(D+E+F)=50-100/0-50, the mole percent ratio of (A+D)/(B+E)=5-95/5-95 and the weight of (C+F) is from 5 to 50% of the weight of (A+B+C+D+E+F).
Claim 8
Dependent Claim
77 words
A thermoplastic polyester copolymer consisting essentially of irregularly distributed recurring units A, B, C, D, E and F having the formulas: ##STR4## wherein R is alkyl having 2 to 6 carbon atoms and n is a positive integer such that -RO) n has a molecular weight of 500-3000, and wherein the mole percent ratio of (A+B+C)/(D+E+F)=50-100/0-50, the mole percent ratio of (A+D)/(B+E)=5-95/5-95 and the weight of (C+F) is from 5 to 50% of the weight of (A+B+C+D+E+F).
Claim 9
Dependent Claim
76 words
A copolymer as claimed in claim 2, wherein said component (A) contains up to 30 mol % of said isophthalic acid or lower alkyl ester thereof, said mixture (B-1) contains 10 to 30 mol % of said 1,4-cyclohexanedimethanol and the balance is said 2-methyl-1,3 propanediol, and the amount of said polyether recurring units is 10 to 40 wt. %, based on the sum of the weights of said polyester recurring units and said polyether recurring units.
Claim 10
Dependent Claim
79 words
A copolymer as claimed in claim 3, wherein said component (A) contains up to 30 mol % of said isophthalic acid or lower alkyl ester thereof, said mixture (B-2) contains 10 to 70 mol % of said 2-methyl-1,3-propanediol and 90 to 30 mol % of said tetramethylene glycol, and the amount of said polyether recurring units is 10 to 40 wt. %, based on the sum of the weights of said polyester recurring units and said polyether recurring units.
Claim 11
Dependent Claim
22 words
A copolymer as claimed in claim 1, wherein said polyalkylene ether glycol (C) has a number-average molecular weight of 800 to 2000.
Claim 12
Dependent Claim
36 words
A copolymer as claimed in claim 1, wherein said polyalkylene ether glycol is selected from the group consisting of polyethylene glycol, poly(1,2-propylene oxide) glycol, poly(1,3-propylene oxide glycol, poly(tetramethylene oxide) glycol, poly(hexamethylene oxide) glycol and copolymers thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-08-01 | 1987-01-31 | 1987-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-01 | 1991-01-31 | 1991-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-01 | 1995-01-31 | 1995-08-02 | $7700.00 | Window Closed / Lapsed |