US5075381A
Expired / Lapsed
US
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Thermoplastic resin composition
Assignee: Mitsubishi Chemical Corp
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Filing: 1990-10-17
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Granted: 1991-12-24
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Expires: 2010-10-17
Abstract
Abstract Disclosed is a thermoplastic resin composition formed by melt-kneading at a temperature of 300° to 340° C. a composition comprising (a) 10 to 95% by weight of a polyphenylene sulfide resin; (b) 90 to 5% by weight of a crystalline resin composed mainly of 3-methyl-1-butene, each of the amount of the components (a) and (b) being based on the sum of the components (a) and (b); (c) 5 to 20 parts by weight per 100 parts by weight of the sum of the components (a) and (b) of a partially hydrogenated alkenyl aromatic compound-conjugated diene copolymer; and (d) up to 150 parts by weight per 100 parts by weight of the sum of the components (a) and (b) of a fibrous filler. In this composition, the poor moldability of the polyphenylene sulfide resin is improved and the poor rigidity at a high temperature of the 3-methyl-1-butene polymer is improved, and excellent heat resistance, chemical resistance and mechanical strength inherently possessed by both the resins are retained.
Inventors
- 👤 Shiroh Gotoh
- 👤 Yoshiaki Kawase
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:36
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/18; C08L23/20; C08L81/00; C08L81/02; C08L21/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
205 words
A thermoplastic resin composition formed by melt-kneading at a temperature of 300° to 340° C. a composition comprising (a) 10 to 95% by weight of a crystalline polyphenylene sulfide resin composed of at least 80 mole % of recurring phenylene sulfide units; (b) 90 to 5% by weight of a crystalline resin which comprises 60 to 100 mole % of 3-methyl-1-butene and has a crystallization degree of 10 to 70%, each amount of the components (a) and (b) being based on the sum of the components (a) and (b); (c) 5 to 10 parts by weight per 100 parts by weight of the sum of the components (a) and (b) of an alkenyl aromatic compound-conjugated diene block copolymer, comprising a polymer block (A) of a lower alkenylphenyl or a lower alkenyl(lower alkyl-substituted phenyl) compound and a polymer block (B) of a conjugated diene compound having 4 to 8 carbon atoms and having a polymer block (B) content of 80 to 20% by weight, in which at least 50% of the unsaturated double bond derived from the conjugated diene is hydrogenated; and (d) 0 to 150 parts by weight per 100 parts by weight of the sum of components (a) and (b) of a fibrous filler.
Claim 2
Dependent Claim
205 words
A thermoplastic resin composition formed by melt-kneading at a temperature of 300° to 340° C. a composition comprising (a) 10 to 95% by weight of a crystalline polyphenylene sulfide resin composed of at least 80 mole % of recurring phenylene sulfide units; (b) 90 to 5% by weight of a crystalline resin which comprises 60 to 100 mole % of 3-methyl-1-butene and has a crystallization degree of 10 to 70%, each amount of the components (a) and (b) being based on the sum of the components (a) and (b); (c) 5 to 10 parts by weight per 100 parts by weight of the sum of the components (a) and (b) of an alkenyl aromatic compound-conjugated diene block copolymer, comprising a polymer block (A) of a lower alkenylphenyl or a lower alkenyl(lower alkyl-substituted phenyl) compound and a polymer block (B) of a conjugated diene compound having 4 to 8 carbon atoms and having a polymer block (B) content of 80 to 20% by weight, in which at least 50% of the unsaturated double bond derived from the conjugated diene is hydrogenated; and (d) 0 to 150 parts by weight per 100 parts by weight of the sum of components (a) and (b) of a fibrous filler.
Claim 3
Dependent Claim
42 words
A composition as set forth in claim 1, wherein the polyphenylene sulfide resin as the component (a) comprises at least 90 mole % of units of ##STR4## and has a melt viscosity of 100 to 20,000 P as measured at 300° C.
Claim 4
Dependent Claim
16 words
A composition as set forth in claim 2, wherein the melt viscosity is 500 to 10,000.
Claim 5
Dependent Claim
95 words
The composition as set forth in claim 1, wherein the crystalline resin of component (b) is selected from the group consisting of (A) a polymer obtained by graft-copolymerizing a crystalline resin comprised of 60 to 100 mole % of 3-methyl-1-butene with an unsaturated compound selected from the group consisting of (i) an unsaturated carboxylic acid or an anhydride thereof and (ii) a silane compound having a vinyl group and a lower alkoxy group, and (B) a mixture of a crystalline resin comprised of 60 to 100 mole % of 3-methyl-1-butene and said graft copolymer (A).
Claim 6
Dependent Claim
39 words
A composition as set forth in claim 1, wherein the viscosity of a toluene solution of the partially hydrogenated alkenyl aromatic compound-conjugated diene copolymer having a concentration of 15% by weight at 25° C. is 5000 to 30 cps.
Claim 7
Dependent Claim
24 words
A composition as set forth in claim 1, wherein the component (a)/component (b) weight ratio is in the range of from 15/85 to 90/10.
Claim 8
Dependent Claim
24 words
A composition as set forth in claim 1, wherein the component (a)/component (b) weight ratio is in the range of from 20/80 to 80/20.
Claim 9
Dependent Claim
24 words
A composition as set forth in claim 1, wherein the component (a)/component (b) weight ratio is in the range of from 20/80 to 40/60.
Claim 10
Dependent Claim
34 words
A composition as set forth in claim 1, wherein the weight ratio of the component (c) to the sum of the components (a) and (b) is in the range of from 5/100 to 20/100.
Claim 11
Dependent Claim
35 words
The composition set forth in claim 1, wherein the crystalline resin of component (B) comprises at last 70 mole % of 3-methyl-1-butene units and the crystallization degree is at least 25% but lower than 60%.
Claim 12
Dependent Claim
30 words
The composition set forth in claim 1, wherein the unsaturated double bond derived from the conjugated diene of the alkenyl aromatic compound-conjugated diene block copolymer is at least 90% hydrogenated.
Claim 13
Dependent Claim
14 words
The composition set forth in claim 4, wherein the silane compound is a vinylalkoxysilane.
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) | 1994-12-23 | 1995-06-24 | 1995-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-23 | 1999-06-24 | 1999-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-23 | 2003-06-24 | 2003-12-24 | $7700.00 | Window Closed / Lapsed |