Patent EP0266791A2 successfully refreshed from Google Patents.
EP0266791A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Poly (arylene sulfide) composition for molding articles
Assignee: Phillips Petroleum Co
•
Filing: 1987-11-06
•
Granted: —
•
Expires: 2007-11-06
Abstract
Abstract A poly(arylene sulfide) composition containing an aromatic sulfone polymer and reinforcing material is provided for molding large articles free of internal cracks. The inventive composition optionally contains a high molecular weight polyphenylene sulfide, a reinforcing material such as glass fibers and a sulfone polymer containing at least one recurring aliphatic group in the polymer chain.
Inventors
- 👤 Jennings Price Blackwell, Jr.
- 👤 William Herbert Beever
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 01:53
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08L; C08L81/00; C08L81/02; C08L81/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
16 words
A composition comprising: (a) a poly(arylene sulfide); (b) a sulfone polymer; and (c) a reinforcing material.
Claim 2
Dependent Claim
16 words
A composition comprising: (a) a poly(arylene sulfide); (b) a sulfone polymer; and (c) a reinforcing material.
Claim 3
Dependent Claim
54 words
The composition of claim 1 wherein said (a) is a polyphenylene sulfide of high molecular weight, said (b) is a polysulfone containing at least one recurring aliphatic group in the polymer chain, and said (c) is a fibrous reinforcing material selected from the group consisting of glass fibers, carbon fibers, asbestos, and aramid fibers.
Claim 4
Dependent Claim
100 words
The composition of claim 1 or 2 wherein said (a) is present in an amount in the range from about 16 to about 45 weight percent based on the total composition, said (b) is present in an amount in the range from about 16 to about 45 weight percent based on the total composition, and said (c) is present in an amount in the range of about 25 to about 60 weight percent based on the total composition and the weight ratio of said (a) to said (b) is in the range from greater than 2/3 to less than 3/2.
Claim 5
Dependent Claim
90 words
The composition of claim 2 wherein the polyphenylene sulfide of high molecular weight is characterized as having an inherent viscosity of 0.25 dl/g or greater and having a melt flow rate within the range from about 50 to about 700 grams per 10 minutes, the polysulfone containing at least one recurring aliphatic group in the polymer chain is derived from the reaction of a dihydric phenol and a 4,4ʹ-dihalodiphenylsulfone, in particular wherein the dihydric phenol is 2,2-bis(4-hydroxyphenyl)propane and the 4,4ʹ-dihalodiphenylsulfone is 4,4ʹ-dichlorodiphenylsulfone and the fibrous reinforcing material is glass fibers.
Claim 6
Dependent Claim
83 words
The composition of one of the preceding claims wherein a polyphenylene sulfide of high molecular weight is present in an amount of about 20 to about 30 weight percent, a polysulfone containing at least one recurring aliphatic group in the polymer chain is present in an amount of about 20 to about 30 weight percent, and the fibrous reinforcing material, preferably glass fibers, is present in an amount of about 30 to about 50 weight percent, based on the weight of the composition.
Claim 7
Dependent Claim
77 words
The composition of one of the preceding claims further comprising from about 0.1 to about 10 weight percent of an ethylene polymer having a density in the range of about 0.910 to about 0.940 g/cc and a melt index of greater than about 100 g/10 minutes, and/or further comprising from about 0.1 to about 5 weight percent of a pigment, and from about 0.5 to about 2 weight percent of at least lithium carbonate and a hydrotalcite.
Claim 8
Dependent Claim
15 words
The composition on one of the preceding claims consisting essentially of the ingredients therein defined.
Claim 9
Independent Claim
108 words
A method for improving the crack resistance of a molded article prepared from a poly(arylene sulfide) molding composition, the method comprising incorporating a sulfone polymer having at least one recurring aliphatic group in the polymer backbone in a molding composition comprising poly(arylene sulfide) and a fibrous reinforcing material; in particular wherein the poly(arylene sulfide) is a polyphenylene sulfide of high molecular weight having an inherent viscosity 0.25 dl/g or greater and a melt flow rate within the range from about 50 to about 700 grams per 10 minutes, the sulfone polymer is derived from the reaction of 2,2-bis(4-hydroxyphenyl)propane and 4,4ʹ-dichlorodiphenylsulfone, and the fibrous reinforcing material is glass fibers.
Claim 10
Independent Claim
108 words
A method for improving the crack resistance of a molded article prepared from a poly(arylene sulfide) molding composition, the method comprising incorporating a sulfone polymer having at least one recurring aliphatic group in the polymer backbone in a molding composition comprising poly(arylene sulfide) and a fibrous reinforcing material; in particular wherein the poly(arylene sulfide) is a polyphenylene sulfide of high molecular weight having an inherent viscosity 0.25 dl/g or greater and a melt flow rate within the range from about 50 to about 700 grams per 10 minutes, the sulfone polymer is derived from the reaction of 2,2-bis(4-hydroxyphenyl)propane and 4,4ʹ-dichlorodiphenylsulfone, and the fibrous reinforcing material is glass fibers.
Claim 11
Dependent Claim
107 words
The method of claim 8 wherein the poly(arylene sulfide) is present in an amount of about 20 to about 30 weight percent, the sulfone polymer is present in an amount of about 20 to about 30 weight percent and the fibrous reinforcing material to present in an amount of about 30 to about 50 weight percent, based on the weight of the composition; in particular the poly(arylene sulfide) molding composition further comprises from about 0.1 to about 10 weight percent of an ethylene polymer having a density in the range of about 0.910 to about 0.940 g/cc and a melt index of greater than about 100g/10 minutes.
Claim 12
Dependent Claim
21 words
The method of claim 8 or 9 wherein the molding composition is as defined in one of claims 1 to 7.
Claim 13
Independent Claim
53 words
The method for molding an article, in particular a thick article, comprising introducing a composition as defined in one of the claims 1 to 7 thoroughly mixed and in a molten state into a mold, allowing the composition in the mold to cool and solidifiy and removing the molded article from the mold.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.