US4764559A
Expired / Lapsed
US
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Polyphenylene ether-polypropylene resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1987-11-16
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Granted: 1988-08-16
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Expires: 2007-11-16
Abstract
Abstract A resin composition is described, comprising (a) a polyphenylene ether resin having a low degree of polymerization or a mixture thereof with a styrene resin, (b) a polyolefin resin, and (c) a styrene compound/conjugated diene block copolymer or a hydrogenation product thereof at a specific compounding ratio. The composition is excellent in melt processability, stiffness at elevated temperatures, and impact strength.
Inventors
- 👤 Shin-ichi Yamauchi
- 👤 Yusuke Arashiro
- 👤 Kenyu Ohno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:41
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L71/00; C08L71/08; C08L71/10; C08L71/12; C08L71/123; C08L2205/00; C08L2205/03; C08L2205/035; C08L23/14; C08L23/142; C08L25/00; C08L25/02; C08L25/04; C08L25/06; Y; Y10; Y10S; Y10S525/00; Y10S525/905
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
121 words
A resin composition comprising (a) from 20 to 80% by weight of a polyphenylene ether resin having an intrinsic viscosity of less than 0.4 dl/g in chloroform at 30° C. or a mixture of such a polyphenylene ether resin and a styrene resin, (b) from 10 to 80% by weight of a polyolefin resin selected from the group consisting of a propylene homopolymer, a propylene copolymer consisting mainly of propylene, and a mixture of such a propylene homo- or copolymer with other α-olefin polymer, and (c) from 2 to 40% by weight of a block copolymer comprising a styrene polymer block and a conjugated diene polymer block or a hydrogenation product thereof in which the conjugated diene polymer block is hydrogenated.
Claim 2
Dependent Claim
121 words
A resin composition comprising (a) from 20 to 80% by weight of a polyphenylene ether resin having an intrinsic viscosity of less than 0.4 dl/g in chloroform at 30° C. or a mixture of such a polyphenylene ether resin and a styrene resin, (b) from 10 to 80% by weight of a polyolefin resin selected from the group consisting of a propylene homopolymer, a propylene copolymer consisting mainly of propylene, and a mixture of such a propylene homo- or copolymer with other α-olefin polymer, and (c) from 2 to 40% by weight of a block copolymer comprising a styrene polymer block and a conjugated diene polymer block or a hydrogenation product thereof in which the conjugated diene polymer block is hydrogenated.
Claim 3
Dependent Claim
55 words
A resin composition as claimed in claim 1, wherein the total amount of the components (b) and (c) is from 30% by weight to 80% by weight based on the total amount of the components (a), (b), and (c), and the ratio of the component (c) to the component (b) is from 0.1 to 2.
Claim 4
Dependent Claim
23 words
A resin composition as claimed in claim 1, wherein said polyphenylene ether resin has an intrinsic viscosity of not less than 0.15 dl/g.
Claim 5
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein said polyphenylene ether resin has an intrinsic viscosity of from 0.2 dl/g to 0.37 dl/g.
Claim 6
Dependent Claim
38 words
A resin composition as claimed in claim 1, wherein said styrene resin is present in an amount of from 0.1 to 50% by weight based on the total amount of the polyphenylene ether resin and the styrene resin.
Claim 7
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein said polyolefin resin has a melt flow rate of from 0.01 to 150 g/10 min.
Claim 8
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein said polyolefin resin has a melt flow rate of from 0.05 to 70 g/10 min.
Claim 9
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein said polyolefin resin has a melt flow rate of from 0.1 to 50 g/10 min.
Claim 10
Dependent Claim
22 words
A resin composition as claimed in claim 1, wherein said polyolefin resin has a propylene content of more than 50% by weight.
Claim 11
Dependent Claim
23 words
A resin composition as claimed in claim 1, wherein said polyolefin resin has a propylene content of from 60 to 99% by weight.
Claim 12
Dependent Claim
22 words
A resin composition as claimed in claim 1, wherein said polyolefin has a propylene content of from 70 to 99% by weight.
Claim 13
Dependent Claim
23 words
A resin composition as claimed in claim 1, wherein said polyolefin resin has a propylene content of from 80 to 95% by weight.
Claim 14
Dependent Claim
34 words
A resin composition as claimed in claim 1, wherein said polyolefin resin is selected from the group consisting of a crystalline propylene/ethylene block copolymer, a crystalline propylene/ethylene random copolymer, and a crystalline propylene homopolymer.
Claim 15
Dependent Claim
47 words
A resin composition as claimed in claim 1, wherein said α-olefin polymer in the component (b) is a rubbery polymer having a propylene content of not more than 50% by weight selected from the group consisting of an ethylene/propylene copolymer, an ethylene/butene copolymer, and an ethylene/propylene/butene copolymer.
Claim 16
Dependent Claim
33 words
A resin composition as claimed in claim 1, wherein said block copolymer has a number average molecular weight of from 30,000 to 150,000 as measured by gel-permeation chromatography on a standard polystyrene scale.
Claim 17
Dependent Claim
33 words
A resin composition as claimed in claim 1, wherein said block copolymer has a number average molecular weight of from 40,000 to 120,000 as measured by gel-permeation chromatography on a standard polystyrene scale.
Claim 18
Dependent Claim
33 words
A resin composition as claimed in claim 1, wherein said block copolymer has a number average molecular weight of from 50,000 to 100,000 as measured by gel-permeation chromatography on a standard polystyrene scale.
Claim 19
Dependent Claim
18 words
A resin composition as claimed in claim 1, wherein the component (c) is a hydrogenated styrene/butadiene/styrene triblock copolymer.
Claim 20
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein the component (c) comprises from 5 to 60% by weight of a styrene polymer block.
Claim 21
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein the component (c) comprises from 10 to 40% by weight of a styrene polymer block.
Claim 22
Dependent Claim
48 words
A resin composition as claimed in claim 1, wherein said hydrogenation product of the block copolymer is obtained by hydrogenating the block copolymer to such an extent that the degree of unsaturation of the conjugated diene polymer block is reduced to 20% or less of the initial degree.
Claim 23
Dependent Claim
43 words
A resin composition as claimed in claim 1, wherein said composition comprises from 30 to 70% by weight of the component (a), from 20 to 80% by weight of the component (b), and from 5 to 30% by weight of the component (c).
Claim 24
Dependent Claim
43 words
A resin composition as claimed in claim 1, wherein said composition comprises from 40 to 60% by weight of the component (a), from 30 to 70% by weight of the component (b), and from 5 to 30% by weight of the component (c).
Claim 25
Dependent Claim
24 words
A resin composition as claimed in claim 1, wherein the ratio of the component (c) to the component (b) is from 0.2 to 1.
Claim 26
Dependent Claim
35 words
A resin composition as claimed in claim 1, wherein the component (b) is present in an amount of from 10 to 78% by weight based on the total amount of the component (a) and (b).
Claim 27
Dependent Claim
35 words
A resin composition as claimed in claim 1, wherein the component (b) is present in an amount of from 20 to 70% by weight based on the total amount of the components (a) and (b).
Claim 28
Dependent Claim
31 words
A resin composition as claimed in claim 1, wherein the component (b) is present in an amount of from 30 to 60% by weight based on the components (a) and (b).
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |