US4935473A
Expired / Lapsed
US
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Polyphenylene sulfide composition and method of producing the same
Assignee: Kureha Corp
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Filing: 1988-12-02
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Granted: 1990-06-19
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Expires: 2008-12-02
Abstract
Abstract The present invention discloses a composition comprising a mixture containing 100 parts by weight of substantially linear polyphenylene sulfide which is treated with an aqueous solution of an acid or a salt of a strong acid and a weak base and which has not less than 70 mol % of a repeating unit of ##STR1## 0.05 to 5 parts by weight of at least one aminoalkoxysilane compound and, if necessary, 0.01 to 3 parts by weight of a releasing agent, the mixture being kneaded under heating at a temperature higher than the melting point of the polyphenylene sulfide, said composition exhibiting excellent impact strength and weld strength and providing molded product with small amount of flash generated during molding. The invention also discloses a composition which further comprises a fibrous reinforcing material and/or an inorganic powdered or granular filler, according to necessity, as well as disclosing a method of producing said composition.
Inventors
- 👤 Makoto Fukuda
- 👤 Yukio Ichikawa
- 👤 Takayuki Katto
- 👤 Toshikatsu Nitoh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:33
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/02; C08K; C08K5/00; C08K5/54; C08K5/544; C08G; C08G75/00; C08G75/02; C08G75/0204; C08G75/0209; C08G75/0213; C08G75/0245; C08G75/025; C08G75/0254; C08G75/0277; C08G75/0281; C08G75/0286; C08G75/0295; C08K5/04; C08K5/10; C08K5/101; C08K5/103; C08L81/04
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
84 words
A melt-kneaded composition of polyphenylene sulfide, having excellent weld and impact strength and an improved anti-flash property when molded, comprising the following ingredients (A) and (B): (A) 100 parts by weight of substantially linear polyphenylene sulfide having not less than 70 mol% of a repeating unit of ##STR14## which has been treated with an aqueous solution of an acid or a salt of a strong acid and a weak base; and (B) 0.05 to 5 parts by weight of at least one aminoalkoxysilane compound.
Claim 2
Dependent Claim
84 words
A melt-kneaded composition of polyphenylene sulfide, having excellent weld and impact strength and an improved anti-flash property when molded, comprising the following ingredients (A) and (B): (A) 100 parts by weight of substantially linear polyphenylene sulfide having not less than 70 mol% of a repeating unit of ##STR14## which has been treated with an aqueous solution of an acid or a salt of a strong acid and a weak base; and (B) 0.05 to 5 parts by weight of at least one aminoalkoxysilane compound.
Claim 3
Dependent Claim
22 words
The melt-kneaded composition of polyphenylene sulfide according to claim 1, further comprising 0.01 to 3 parts by weight of a releasing agent.
Claim 4
Dependent Claim
50 words
The melt-kneaded composition of polyphenylene sulfide according to claims 1 or 2, wherein said ingredient (A) is 100 parts by weight of substantially linear polyphenylene sulfide block copolymer comprising 70 to 95 mol% of a releasing unit of ##STR15## and 5 to 30 mol% of a repeating unit of ##STR16##
Claim 5
Dependent Claim
39 words
The melt-kneaded composition of polyphenylene sulfide according to claims 1 or 2, wherein said aminoalkoxysilane compound is an aminoalkylalkoxysilane having an alkyl group of 1 to 4 carbon atoms and an alkoxy group of 1 to 4 carbon atoms.
Claim 6
Dependent Claim
15 words
The melt-kneaded composition of polyphenylene sulfide according to claim 4, wherein said aminoalkylalkoxysilane is γ-aminopropyltriethoxysilane.
Claim 7
Dependent Claim
23 words
The melt-kneaded composition of polyphenylene sulfide according to claims 1 or 2, further comprising a reinforcing material, a filler or a mixture thereof.
Claim 8
Dependent Claim
41 words
The melt-kneaded composition of polyphenylene sulfide according to claim 6, wherein said reinforcing material, said filler or said mixture is present in an amount of 0.1 to 400 parts by weight based on 100 parts by weight of said ingredient (A).
Claim 9
Dependent Claim
23 words
The melt-kneaded composition of polyphenylene sulfide according to claim 2, wherein said releasing agent is a fatty acid ester of a polyhydric alcohol.
Claim 10
Dependent Claim
51 words
The melt-kneaded composition of polyphenylene sulfide according to claims 1 or 2, wherein said polyphenylene sulfide is treated with an aqueous solution of an acid or a salt of a strong acid and a weak base after said polyphenylene sulfide has been polymerized and before said polyphenylene sulfide has been dried.
Claim 11
Dependent Claim
28 words
The melt-kneaded composition of polyphenylene sulfide according to claims 1 or 2, wherein said salt of a strong acid and weak base is ammonium chloride or ammonium sulfate.
Claim 12
Independent Claim
121 words
A method of producing a polyphenylene sulfide composition which has excellent weld and impact strength and an improved anti-flash property when molded, comprising the step of kneading with heating a mixture comprising (a) 100 parts by weight of substantially linear polyphenylene sulfide which is obtained by polycondensation of a dihaloaromatic compound and sodium sulfide and is treated with an aqueous solution of an acid or a salt of a strong acid and a weak base thereafter and which has not less than 70 mol% of a repeating unit of ##STR17## and (b) 0.05 to 5 parts by weight of at least one aminoalkoxysilane compound, wherein said heating is performed at a temperature higher than the melting point of said polyphenylene sulfide.
Claim 13
Independent Claim
121 words
A method of producing a polyphenylene sulfide composition which has excellent weld and impact strength and an improved anti-flash property when molded, comprising the step of kneading with heating a mixture comprising (a) 100 parts by weight of substantially linear polyphenylene sulfide which is obtained by polycondensation of a dihaloaromatic compound and sodium sulfide and is treated with an aqueous solution of an acid or a salt of a strong acid and a weak base thereafter and which has not less than 70 mol% of a repeating unit of ##STR17## and (b) 0.05 to 5 parts by weight of at least one aminoalkoxysilane compound, wherein said heating is performed at a temperature higher than the melting point of said polyphenylene sulfide.
Claim 14
Dependent Claim
27 words
The method of producing a polyphenylene sulfide composition according to claim 11, wherein said mixture further comprises 0.01 to 3 parts by weight of a releasing agent.
Claim 15
Independent Claim
46 words
The method of producing a polyphenylene sulfide composition according to claims 11 or 12, wherein said substantially linear polyphenylene sulfide is a block copolymer comprising 70 to 95 mol% of a repeating unit of ##STR18## and 5 to 30 mol% of a repeating unit of ##STR19##
Claim 16
Independent Claim
41 words
The method of producing a polyphenylene sulfide composition according to claims 11 or 12, wherein said aminoalkoxysilane compound is an aminoalkylalkoxysilane having an alkyl group of 1 to 4 carbon atoms and an alkoxy group of 1 to 4 carbon atoms.
Claim 17
Dependent Claim
17 words
The method of producing a polyphenylene sulfide composition according to claim 14 wherein said aminoalkylalkoxysilane is γ-aminopropyltriethoxysilane.
Claim 18
Independent Claim
28 words
The method of producing a polyphenylene sulfide composition according to claims 11 or 12, wherein said mixture further comprises a reinforcing material, a filler or a mixture thereof.
Claim 19
Dependent Claim
44 words
The method of producing a polyphenylene sulfide composition according to claim 16, wherein said reinforcing material, said filler or said mixture thereof is present in an amount of 0.1 to 400 parts by weight based on 100 parts by weight of said polyphenylene sulfide.
Claim 20
Dependent Claim
25 words
The method of producing a polyphenylene sulfide composition according to claim 12 wherein said releasing agent is a fatty acid ester of a polyhydric alcohol.
Claim 21
Independent Claim
52 words
The method of producing a polyphenylene sulfide composition according to claims 11 or 12, wherein said polyphenylene sulfide is treated with said aqueous solution of an acid or a salt of a strong acid and weak base after said polyphenylene sulfide has been polymerized and before said polyphenylene sulfide has been dried.
Claim 22
Independent Claim
30 words
The method of producing a polyphenylene sulfide composition according to claims 11 or 12, wherein said salt of a strong acid and weak base is ammonium chloride or ammonium sulfate.
References Cited (Backward Citations)
US4451601A
Cited
US4645826A
Cited
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
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