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US4161498A
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Blends of low molecular weight polyalkylene terephthalate resins and organopolysiloxane-polycarbonate block copolymers
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 low molecular weight 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
- 👤 Richard C. Bopp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:47
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
57 words
An improved high impact nonreinforced blend comprising a low molecular weight polyalkylene terephthalate resin having an intrinsic viscosity range of from about 0.2 to about 1.0 dl./g. and an organopolysiloxane-polycarbonate block copolymer, subject to the proviso that the blend has an impact value greater than the impact value of the polyalkylene terephthalate resin component of the blend.
Claim 2
Dependent Claim
57 words
An improved high impact nonreinforced blend comprising a low molecular weight polyalkylene terephthalate resin having an intrinsic viscosity range of from about 0.2 to about 1.0 dl./g. and an organopolysiloxane-polycarbonate block copolymer, subject to the proviso that the blend has an impact value greater than the impact value of the polyalkylene terephthalate resin component of the blend.
Claim 3
Dependent Claim
21 words
A claim 1 composition wherein, on a weight basis, a ratio of said resin to said copolymer is 99:1 to 1:99.
Claim 4
Dependent Claim
12 words
A claim 2 composition wherein said ratio is from 99:2 to 50:50.
Claim 5
Dependent Claim
12 words
The claim 3 composition wherein said ratio is from 95:5 to 70:30.
Claim 6
Dependent Claim
25 words
The claim 4 composition wherein the notched Izod impact of the blend is at least 200 percent greater than that of said polyalkylene terephthalate resin.
Claim 7
Dependent Claim
36 words
The claim 1 composition wherein said resin is of the formula: ##STR6## n being a number of from 1 to 50, and said resin has an intrinsic viscosity of from about 0.2 to about 1.0 dl./g.
Claim 8
Dependent Claim
131 words
The claim 1 composition wherein said organopolysiloxane-polycarbonate block copolymer is of the formula: ##STR7## 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 9
Dependent Claim
129 words
The claim 7 composition wherein said copolymer is of the formula: ##STR8## wherein 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
26 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
26 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)
DE1136490B
Cited
US3686355A
Cited
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 |