US4178277A
Expired / Lapsed
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Modified polyesters
Assignee: Dynamit Nobel AG
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Filing: 1978-06-14
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Granted: 1979-12-11
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Expires: 1998-06-14
Abstract
Abstract A modified polyester composition comprising the condensation product of terephthalic acid or a polyester-forming derivative thereof and a diol, said polyester having an arithmetical mean molecular weight M n or more than 17,000, a carboxyl equivalent of at least 10 mVal/kg, a nitrogen content of less than 0.4 weight percent and urethane groups linked linearly to said polyester; a process for preparing such modified polyester and a molding composition comprising such modified polyester and an additive, suitably a filler and in particular glass fibers.
Inventors
- 👤 Peter Gebauer
- 👤 Wilhelm Kaufer
- 👤 Herbert Klinkenberg
- 👤 Hilde Sontgerath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4205; C08G18/4208; C08G18/4211; C08G18/4213; C08G18/4263; C08G63/00; C08G63/91; C08G63/914; C08G63/916
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
132 words
A modified polyester composition consisting essentially of the condensation product of a reaction mixture consisting essentially of a copolymer of terephthalic acid or a polyester forming derivative thereof, an aliphatic, cycloaliphatic or other aromatic dicarboxylic acid or its polyester forming derivative wherein the terephthalic acid or its polyester forming derivative comprises at least 50 mole percent based upon the combined amounts of acids or their polyester derivatives and a mixture of diols comprising at least 50 mole percent, based upon the combined amounts of diols, of butane diol-1,4, said copolymer having an arithmetical mean molecular weight M n of more than 17,000 and up to 40,000, a carboxyl equivalent of at least 10 m Val/kg, a nitrogen content of less than 0.4 weight percent and urethane groups linked linearly to said copolymer.
Claim 2
Dependent Claim
132 words
A modified polyester composition consisting essentially of the condensation product of a reaction mixture consisting essentially of a copolymer of terephthalic acid or a polyester forming derivative thereof, an aliphatic, cycloaliphatic or other aromatic dicarboxylic acid or its polyester forming derivative wherein the terephthalic acid or its polyester forming derivative comprises at least 50 mole percent based upon the combined amounts of acids or their polyester derivatives and a mixture of diols comprising at least 50 mole percent, based upon the combined amounts of diols, of butane diol-1,4, said copolymer having an arithmetical mean molecular weight M n of more than 17,000 and up to 40,000, a carboxyl equivalent of at least 10 m Val/kg, a nitrogen content of less than 0.4 weight percent and urethane groups linked linearly to said copolymer.
Claim 3
Dependent Claim
10 words
A composition according to claim 1 which is substantially uncrosslinked.
Claim 4
Dependent Claim
22 words
A composition according to claim 2 wherein said modified polyester has an arithmetical mean molecular weight M n of more than 23,000.
Claim 5
Dependent Claim
22 words
A composition according to claim 2 wherein said modified polyester has an arithmetical mean molecular weight M n of more than 29,000.
Claim 6
Dependent Claim
17 words
A composition according to claim 2 which is the condensation product of said copolymer and a diisocyanate.
Claim 7
Dependent Claim
18 words
A composition according to claim 5 wherein said diisocyanate has a molecular weight of between 168 and 500.
Claim 8
Dependent Claim
18 words
A composition according to claim 5 wherein said modified polyester has a polymolecularity index of 2.0 to 5.0.
Claim 9
Dependent Claim
18 words
A composition according to claim 5 wherein said modified polyester has a polymolecularity index of 2.5 to 4.5.
Claim 10
Dependent Claim
19 words
A composition according to claim 5 wherein said modified polyester has a nitrogen content less than 0.2% by weight.
Claim 11
Dependent Claim
26 words
A composition according to claim 5 wherein said diisocyanate has the formula O═C═N--R--N═C═O wherein R is an alkylene moiety or a mono or polynuclear arylene moiety.
Claim 12
Dependent Claim
32 words
A composition according to claim 10 wherein said diisocyanate is selected from the group consisting of hexamethylene diisocyanate, 4,4'-diisocyanatodiphenyl, 4,4'-diisocyanato-3,3'-dimethoxydiphenyl, 4,4'-diisocyanato-3,3'-dimethylidiphenyl, 4,4'-diisocyanato-3,3'-diphenyl-diphenyl, 4,4'-diisocyanatodiphenylmethane, 4,4'-diisocyanato-3,3'-dimethylidiphenylmethane, 1,5-diisocyanatonaphthaline, toluylenediisocyanate (2,4 and/or 2,6-diisocyanatotoluene) and m-xylylene diisocyanate.
Claim 13
Dependent Claim
20 words
A composition according to claim 10 wherein said modified polyester is soluble in a 60:40 mixture of phenol and 1,1,2,2-tetrachloroethane.
Claim 14
Dependent Claim
19 words
A composition according to claim 10 wherein said modified polyester has a carboxyl content of up to 90 mVal/kg.
Claim 15
Dependent Claim
15 words
A composition according to claim 10 wherein said diol has 2 to 10 carbon atoms.
Claim 16
Dependent Claim
15 words
A composition according to claim 4 wherein said diol has 3 to 8 carbon atoms.
Claim 17
Dependent Claim
36 words
A composition according to claim 14 wherein said diol is selected from the group consisting of isomers of propylene glycol, ethylene glycol, isomer of butylene glycol, neopentyl glycol, cyclohexanedimethanol isomers of hexanediol and isomers of octanediol.
Claim 18
Dependent Claim
29 words
A composition according to claim 17 wherein said aliphatic, cycloaliphatic or aromatic dicarboxylic acid is adipic acid, azelaic acid, sebacic acid, dodecane diacid, cyclohexane dicarboxylic acid or isophthalic acid.
Claim 19
Dependent Claim
11 words
A composition according to claim 14 wherein said diol is butanediol-1,4.
Claim 20
Dependent Claim
13 words
A molding composition comprising the modified polyester of claim 1 and an additive.
Claim 21
Dependent Claim
27 words
A composition according to claim 19 wherein said said additive is a filler and said filler is present in an amount of 2 to 80 weight percent.
Claim 22
Dependent Claim
20 words
A composition according to claim 20 wherein said filler is present in an amount of 20 to 50 weight percent.
Claim 23
Dependent Claim
31 words
A composition according to claim 20 wherein said filler in glass sphere, glass powder, glass whiskers, asbestos fibers, carbon fibers, synthethic fibers, metal threads, metal chips, metal powder or mixtures thereof.
Claim 24
Dependent Claim
18 words
A composition according to claim 19 wherein said additive is a stabilizer, lubricant, dye, pigment or nucleating agent.
Claim 25
Dependent Claim
58 words
A method for preparing the modified polyester of claim 1 which comprises contacting a polyester itself being the condensation product of terephthalic acid or an ester forming derivative thereof and a diol with a diisocyanate, the polyester reactant having an arithmetical mean molecular weight M n greater than 8,000 and a carboxyl equivalent of at least 10 mVal/kg.
Claim 26
Dependent Claim
15 words
A composition according to claim 24 wherein said process is conducted in the plastic state.
Claim 27
Dependent Claim
24 words
A composition according to claim 24 wherein a mixture of such polyesters is reacted with said diisocyanate and said polyesters having different molecular weights.
Claim 28
Dependent Claim
17 words
A composition according to claim 24 wherein said diisocyanate has a molecular weight of 168 to 500.
Claim 29
Dependent Claim
13 words
A composition according to claim 27 wherein said diisocyanate has the formula O═C═N--R--N═C═O.
Claim 30
Dependent Claim
32 words
A composition according to claim 28 wherein said diisocyanate is selected from the group consisting of hexamethylene diisocyanate, 4,4'-diisocyanatodiphenyl, 4,4'-diisocyanato-3,3'-dimethoxydiphenyl, 4,4'-diisocyanato-3,3'-dimethylidiphenyl, 4,4'-diisocyanato-3,3'-diphenyl-diphenyl, 4,4'-diisocyanatodiphenylmethane, 4,4'-diisocyanato-3,3'-dimethylidiphenylmethane, 1,5-diisocyanatonaphthaline, toluylenediisocyanate (2,4 and/or 2,6-diisocyanatotoluene) and m-xylylene diisocyanate.
Claim 31
Dependent Claim
21 words
A composition according to claim 24 wherein the carboxyl equivalent of the polyester which is reacted is up to 90 mVal/kg.
Claim 32
Dependent Claim
12 words
A composition according to claim 28 wherein said diisocyanate is 4,4'-diphenylmethane diisocyanate.
Claim 33
Dependent Claim
35 words
A composition according to claim 28 wherein said diisocyanate is used in such an amount that the content of bound nitrogen, determined as N 1 in the resultant product is less than 0.4 weight percent.
Claim 34
Dependent Claim
28 words
A composition according to claim 32 wherein the process is carried out at a temperature at which substantial reaction of the diisocyanate with the carboxyl groups is avoided.
Claim 35
Dependent Claim
22 words
A modified polyester according to claim 1 wherein said copolymer has an arithmetical mean molecular weight M n of up to 35,000.
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) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |