US3886104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polyester compositions
Assignee: General Electric Co
•
Filing: 1973-01-05
•
Granted: 1975-05-27
•
Expires: 1993-01-05
Abstract
Abstract High molecular weight polyesters, such as poly(alkylene terephthalates), are stabilized against deterioration by heat, oxidation, and the like, with a stabilizer comprising an organic compound containing only carbon, hydrogen and oxygen and having at least two internal epoxide groups. Also provided are reinforced embodiments of the stabilized compositions.
Inventors
- 👤 Willem F H Borman
- 👤 Eugene P Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:54
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
28 words
A STABILIZED THERMOPLASTIC COMPOSITION COMPRISING I. A HIGH MOLECULAR WEIGHT LINEAR POLYESTER RESIN NORMALLY TENDING TO UNDERGO THERMAL SCISSION, SAID RESIN HAVING REPEATING UNITS OF THE GENERAL FORMULA
Claim 2
Dependent Claim
28 words
A STABILIZED THERMOPLASTIC COMPOSITION COMPRISING I. A HIGH MOLECULAR WEIGHT LINEAR POLYESTER RESIN NORMALLY TENDING TO UNDERGO THERMAL SCISSION, SAID RESIN HAVING REPEATING UNITS OF THE GENERAL FORMULA
Claim 3
Dependent Claim
25 words
A stabilized composition as defined in claim 1 wherein the stabilizer has a molecular weight in the range of from about 500 to about 25,000.
Claim 4
Dependent Claim
20 words
A stabilized composition as defined in claim 1 wherein the stabilizer is an epoxidized polyunsaturated triglyceride or an epoxidized polybutadiene.
Claim 5
Dependent Claim
15 words
A stabilized composition as defined in claim 3 wherein the stabilizer is epoxidized linseed oil.
Claim 6
Dependent Claim
15 words
A stabilized composition as defined in claim 3 wherein the stabilizer is epoxidized soybean oil.
Claim 7
Dependent Claim
14 words
A stabilized composition as defined in claim 3 wherein the stabilizer is epoxidized polybutadiene.
Claim 8
Dependent Claim
19 words
A stabilized composition as defined in claim 1 wherein in said polyester resin n is from 2 to 4.
Claim 9
Dependent Claim
14 words
A stabilized composition according to claim 7 wherein said polyester resin is poly(1,4-butylene terephthalate).
Claim 10
Dependent Claim
34 words
A stabilized composition as defined in claim 1 wherein the stabilizer comprises from about 0.05 to about 5.0 parts by weight per 100 parts by weight of the polyester resin component in said composition.
Claim 11
Dependent Claim
52 words
A stabilized composition as defined in claim 1 wherein said polyester resin is poly(1,4-butylene terephthalate) and the stabilizer is epoxidized linseed oil, epoxidized soybean oil or epoxidized polybutadiene and comprises from about 0.25 to about 2.5 parts by weight per 100 parts by weight of the polyester resin component in said composition.
Claim 12
Dependent Claim
21 words
A stabilized composition as defined in claim 1 which also includes a small, effective costablizing amount of an organic phosphite compound.
Claim 13
Dependent Claim
34 words
A reinforced stabilized thermoplastic composition comprising A. a stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission, said resin having repeating units of the general formula
Claim 14
Dependent Claim
34 words
A reinforced stabilized thermoplastic composition comprising A. a stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission, said resin having repeating units of the general formula
Claim 15
Dependent Claim
26 words
A reinforced stabilized composition as defined in claim 12 wherein the stabilizer has a molecular weight in the range of from about 500 to about 25,000.
Claim 16
Dependent Claim
21 words
A reinforced stabilized composition as defined in claim 12 wherein the stabilizer is an epoxidized polyunsaturated triglyceride or an epoxidized polybutadiene.
Claim 17
Dependent Claim
14 words
A composition as defined in claim 14 wherein the stabilizer is epoxidized linseed oil.
Claim 18
Dependent Claim
14 words
A composition as defined in claim 14 wherein the stabilizer is epoxidized soybean oil.
Claim 19
Dependent Claim
13 words
A composition as defined in claim 14 wherein the stabilizer is epoxidized polybutadiene.
Claim 20
Dependent Claim
36 words
A composition as defined in claim 12 wherein the reinforcing filler B comprises from about 1 to about 80 parts by weight based on 100 parts by weight of thE polyester resin component and the filler.
Claim 21
Dependent Claim
14 words
A composition as defined in claim 12 wherein said polyester resin is poly(1,4-butylene terephthalate).
Claim 22
Dependent Claim
26 words
A composition as defined in claim 12 wherein reinforcing filler B is selected from the group consisting of reinforcing metals, ceramics, silicates, quartz, glass and carbons.
Claim 23
Dependent Claim
41 words
A composition as defined in claim 20 wherein said reinforcing filler is filamentous glass, in an amount of from about 1 to about 80 parts by weight based on 100 parts by weight of the polyester resin component and the glass.
Claim 24
Dependent Claim
63 words
A reinforced, stabilized composition as defined in claim 12 wherein the stabilizer comprises from about 0.05 to about 5.0 parts by weight per 100 parts by weight of said polyester resin and said reinforcing filler B is filamentous glass and comprises from about 5 to about 50 parts by weight based upon 100 parts by weight of the polyester resin and the glass.
Claim 25
Dependent Claim
81 words
A reinforced, stabilized composition as defined in claim 12 wherein said polyester resin is poly(1,4-butylene terephthalate); the stabilizer is epoxidized linseed oil, epoxidized soybean oil or epoxidized polybutadiene and comprises from about 0.25 to about 2.5 parts by weight per 100 parts by weight of said polyester resin; and said reinforcing filler is filamentous glass, in an amount of from about 10 to about 40 parts by weight based upon 100 parts by weight of the polyester resin and the glass.
Claim 26
Dependent Claim
22 words
A reinforced, stabilized composition as defined in claim 12 which also includes a small, effective costabilizing amount of an organic phosphite 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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |