Patent US3969306A successfully refreshed from Google Patents.
US3969306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized polyester compositions
Assignee: General Electric Co
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Filing: 1972-11-20
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Granted: 1976-07-13
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Expires: 1992-11-20
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 a polybutadiene, with high vinyl content. 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
2026-10-25 23:57
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
34 words
A stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission and ii. a stabilizing quantity of a polybutadiene, having a vinyl content of at least 85%.
Claim 2
Dependent Claim
34 words
A stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission and ii. a stabilizing quantity of a polybutadiene, having a vinyl content of at least 85%.
Claim 3
Dependent Claim
26 words
A stabilized composition as defined in claim 1 wherein said polybutadiene is terminated with a member selected from the group consisting of hydrogen, hydroxyl and carboxyl.
Claim 4
Dependent Claim
30 words
A stabilized composition as defined in claim 1 wherein said polyester resin is a poly(alkylene terephthalate, isophthalate or mixed isophthalate-terephthalate), said alkylene groups containing from 2 to 10 carbon atoms.
Claim 5
Dependent Claim
14 words
A stabilized composition according to claim 3 wherein said polyester resin is poly(1,4-butylene terephthalate).
Claim 6
Dependent Claim
34 words
A stabilized composition as defined in claim 1 wherein said polybutadiene 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 7
Dependent Claim
52 words
A reinforced stabilized composition comprising A. a stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission ii. a stabilizing quantity of a polybutadiene, having a vinyl content of at least 85%; and B. a reinforcing amount of a reinforcing filler for said stabilized composition.
Claim 8
Dependent Claim
52 words
A reinforced stabilized composition comprising A. a stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission ii. a stabilizing quantity of a polybutadiene, having a vinyl content of at least 85%; and B. a reinforcing amount of a reinforcing filler for said stabilized composition.
Claim 9
Dependent Claim
25 words
A composition as defined in claim 5 wherein said polybutadiene is terminated with a member selected from the group consisting of hydrogen, hydroxyl and carboxyl.
Claim 10
Dependent Claim
36 words
A composition as defined in claim 6 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 11
Dependent Claim
14 words
A composition as defined in claim 6 wherein said polyester resin is poly(1,4-butylene terephthalate).
Claim 12
Dependent Claim
26 words
A composition as defined in claim 6 wherein reinforcing filler B is selected from the group consisting of reinforcing metals, ceramics, silicates, quartz, glass and carbons.
Claim 13
Dependent Claim
41 words
A composition as defined in claim 10 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 14
Dependent Claim
63 words
A reinforced, stabilized composition as defined in claim 6 wherein said polybutadiene 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 flamentous 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 15
Dependent Claim
41 words
A stabilized composition as defined in claim 1 wherein said polyester resin is poly(1,4-butylene terephthalate) and said polybutadiene 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 16
Dependent Claim
70 words
A reinforced stabilized composition as defined in claim 6 wherein said polyester resin is poly(1,4-butylene terephthalate); said polybutadiene 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 17
Dependent Claim
20 words
A stabilized composition as defined in claim 1 which also includes a small, effective amount of a hindered phenol antioxidant.
Claim 18
Dependent Claim
36 words
A stabilized composition as defined in claim 15 wherein said hindered phenol is 2,5-bis(octylthio)-6-(4'-hydroxy-3',5'-di-t-butylanilino)-1,3,5-triazine or tetrakis-[methylene(3',5'-di-t-butyl-4'-hydroxy)hydrocinnamate]methane and comprises from about 0.05 to about 0.25 parts by weight based on 100 parts by weight of said polyester.
Claim 19
Dependent Claim
21 words
A reinforced, stabilized composition as defined in claim 6 which also includes a small, effective amount of a hindered phenol antioxidant.
Claim 20
Dependent Claim
37 words
A reinforced, stabilized composition as defined in claim 17 wherein said hindered phenol is 2,4-bis(octylthio)-6-(4'-hydroxy-3',5'-di-t-butylanilino)-1,3,5-triazine or tetrakis-[methylene(3',5'-di-t-butyl-4'-hydroxy)hydrocinnamate]methane and comprises from about 0.05 to about 0.25 parts by weight based on 100 parts by weight of said polyester.
Claim 21
Dependent Claim
21 words
A stabilized composition as defined in claim 1 which also includes a small, effective costabilizing amount of an organic phosphite compound.
Claim 22
Dependent Claim
22 words
A reinforced, stabilized composition as defined in claim 6 which also includes a small, effective costabilizing amount of an organic phosphite compound.
Claim 23
Dependent Claim
40 words
A stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission and ii. a stabilizing quantity of a viscous, colorless to light yellow liquid polybutadiene, having a vinyl content of at least 85%.
Claim 24
Dependent Claim
40 words
A stabilized composition comprising i. a high molecular weight linear polyester resin normally tending to undergo thermal scission and ii. a stabilizing quantity of a viscous, colorless to light yellow liquid polybutadiene, having a vinyl content of at least 85%.
Claim 25
Dependent Claim
26 words
A stabilized composition as defined in claim 21 wherein said polybutadiene is terminated with a member selected from the group consisting of hydrogen, hydroxyl and carboxyl.
Claim 26
Dependent Claim
30 words
A stabilized composition as defined in claim 21 wherein said polyester resin is a poly(alkylene terephthalate, isophthalate or mixed isophthalate-terephthalate), said alkylene groups containing from 2 to 10 carbon atoms.
Claim 27
Dependent Claim
14 words
A stabilized composition according to claim 23 wherein said polyester resin is poly(1,4-butylene terephthalate).
Claim 28
Dependent Claim
34 words
A stabilized composition as defined in claim 21 wherein said polybutadiene 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.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |