US4161469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyalkylene terephthalate and organopolysiloxane-polycarbonate block copolymer blends
Assignee: General Electric Co
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Filing: 1978-01-09
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Granted: 1979-07-17
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Expires: 1998-01-09
Abstract
Abstract A blend comprising a polyalkylene terephthalate resin and an organopolysiloxane-polycarbonate block copolymer having improved impact and heat distortion properties. The polymer blends can be molded or formed into films, sheets, fibers, laminates, or other improved molded articles of manufacture including reinforced articles by conventional techniques.
Inventors
- 👤 Donald G. LeGrand
- 👤 Albert F. Yee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:55
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02; C08L83/00; C08L83/10
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
30 words
A polymer blend comprising a polyalkylene terephthalate resin and an organopolysiloxane-polycarbonate block copolymer having impact values greater than the impact value of the polyalkylene terephthalate resin component of the blend.
Claim 2
Dependent Claim
30 words
A polymer blend comprising a polyalkylene terephthalate resin and an organopolysiloxane-polycarbonate block copolymer having impact values greater than the impact value of the polyalkylene terephthalate resin component of the blend.
Claim 3
Dependent Claim
22 words
The claim 1 blend, wherein, on a weight basis, the ratio of said resin to said copolymer is from 99:1 to 1:99.
Claim 4
Dependent Claim
12 words
The claim 2 blend, wherein said ratio is from 98:2 to 50:50.
Claim 5
Dependent Claim
12 words
The claim 3 blend, wherein said ratio is from 95:5 to 70:30.
Claim 6
Dependent Claim
26 words
The claim 4 blend, further comprising a reinforcing amount of a reinforcing filler and wherein said resin has an intrinsic viscosity of at least 0.2 dl./g.
Claim 7
Dependent Claim
12 words
The claim 5 blend, wherein said filler is a fibrous glass filament.
Claim 8
Dependent Claim
21 words
The claim 1 blend, wherein the heat distortion temperature is at least comparable to the heat distortion temperature of said resin.
Claim 9
Dependent Claim
129 words
The claim 1 blend, wherein said copolymer is of the formula: ##STR6## where X is an integer equal to 1 to 1000, inclusive, preferably 2 to 100, n is a number average equal to 1 to 100, inclusive, preferably 5 to 40, a is a number average equal to 1.1 to 100, m is equal to 1, and Z is an integer equal to 1 to 1000, inclusive, preferably 5 to 12, E is a member selected from the class of hydrogen, lower alkyl radicals and halogen radicals and mixtures thereof, R is a member selected from the class of hydrogen, monovalent hydrocarbon radicals and halogenated monovalent hydrocarbon radicals, and R' is a member selected from the class of monovalent hydrocarbon radicals, halogenated monovalent hydrocarbon radicals and cyanoalkyl radicals.
Claim 10
Dependent Claim
32 words
The claim 7 blend wherein X equals ˜ 7; Y equals ˜ 8 to 10; Z equals ˜ 1; a equals ˜ 2; n equals ˜ 10; and m equals ˜ 1.
Claim 11
Dependent Claim
32 words
The claim 7 blend wherein X equals ˜ 10; Y equals ˜ 8 to 10; Z equals ˜ 1; a equals ˜ 2; n equals ˜ 20; and m equals ˜ 1.
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) | 1982-07-16 | 1983-01-15 | 1983-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-07-16 | 1987-01-15 | 1987-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-07-16 | 1991-01-15 | 1991-07-17 | $7700.00 | Window Closed / Lapsed |