Polyarylene Sulfide Composition

Abstract

A polymer composition that comprises a polyarylene sulfide, inorganic fibers, an impact modifier, an organosilane compound, and a high molecular weight siloxane polymer is provided.

What is claimed is: 
     
         1 . A polymer composition comprising a polyarylene sulfide, inorganic fibers, an impact modifier, an organosilane compound, and a high molecular weight siloxane polymer. 
     
     
         2 . The polymer composition of  claim 1 , wherein the siloxane polymer constitutes from about 0.05 wt. % to about 5 wt. % of the polymer composition. 
     
     
         3 . The polymer composition of  claim 1 , wherein the inorganic fibers constitute from about 1 wt. % to about 50 wt. % of the polymer composition, the impact modifier constitutes from about 1 wt. % to about 40 wt. % of the polymer composition, the organosilane compound constitutes from about 0.02 wt. % to about 4 wt. % of the polymer composition, and/or the polyarylene sulfide constitutes from about 25 wt. % to about 95 wt. % of the polymer composition. 
     
     
         4 . The polymer composition of  claim 1 , wherein the polyarylene sulfide is a linear polyphenylene sulfide. 
     
     
         5 . The polymer composition of  claim 1  wherein the impact modifier includes an epoxy-functionalized olefin copolymer. 
     
     
         6 . The polymer composition of  claim 5 , wherein the epoxy-functionalized olefin copolymer contains an ethylene monomeric unit. 
     
     
         7 . The polymer composition of  claim 5 , wherein the epoxy-functionalized olefin copolymer contains an epoxy-functional (meth)acrylic monomeric component. 
     
     
         8 . The polymer composition of  claim 7 , wherein the epoxy-functional (meth)acrylic monomeric component is derived from glycidyl acrylate, glycidyl methacrylate, or a combination thereof. 
     
     
         9 . The polymer composition of  claim 7 , wherein the epoxy-functional (meth)acrylic monomeric unit constitutes from about 1 wt. % to about 20 wt. % of the copolymer. 
     
     
         10 . The polymer composition of  claim 1 , wherein the organosilane compound has the following general formula:
   R 5 —Si—(R 6 ) 3 ,
   wherein,   R 5  is a sulfide group, an alkyl sulfide containing from 1 to 10 carbon atoms, alkenyl sulfide containing from 2 to 10 carbon atoms, alkynyl sulfide containing from 2 to 10 carbon atoms, amino group, aminoalkyl containing from 1 to 10 carbon atoms, aminoalkenyl containing from 2 to 10 carbon atoms, aminoalkynyl containing from 2 to 10 carbon atoms, or a combination thereof; and   R 6  is an alkoxy group of from 1 to 10 carbon atoms.   
     
     
         11 . The polymer composition of  claim 1 , wherein the organosilane compound includes 3-aminopropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, or a combination thereof. 
     
     
         12 . The polymer composition of  claim 1 , wherein the inorganic fibers include glass fibers. 
     
     
         13 . The polymer composition of  claim 1 , wherein the siloxane polymer has a weight average molecular weight of about 100,000 grams per mole or more. 
     
     
         14 . The polymer composition of  claim 1 , wherein the siloxane polymer has a kinematic viscosity of about 10,000 centistokes or more. 
     
     
         15 . The polymer composition of  claim 1 , wherein the siloxane polymer contains R 3 SiO 1/2  and SiO 4/2  units, wherein R is a functional or nonfunctional organic group. 
     
     
         16 . The polymer composition of  claim 1 , further comprising an ethylene/α-olefin polymer in an amount of from 0.05 wt. % to about 5 wt. % of the polymer composition. 
     
     
         17 . The polymer composition of  claim 1 , wherein the composition has a melt viscosity of about 5,000 poise or less as determined in accordance with ISO Test NO. 11443:2005 at a shear rate of 1200 s −1  and at a temperature of 316° C. 
     
     
         18 . A molded part comprising the polymer composition of  claim 1 . 
     
     
         19 . The molded part of  claim 18 , wherein the part has a notched Charpy impact strength of about 5 kJ/m 2  or more, measured at a temperature of 23° C. according to ISO Test No. 179-1:2010. 
     
     
         20 . A melt-extruded sheet comprising the polymer composition of  claim 1 . 
     
     
         21 . A food tray comprising the polymer composition of  claim 1 . 
     
     
         22 . The food tray of  claim 21 , wherein the tray contains a sidewall that extends upwardly from a lower wall to define a receptacle for one or more food products, wherein the sidewall, lower wall, or a combination thereof contain the polymer composition. 
     
     
         23 . An overmolded structure comprising the polymer composition of  claim 1  and a metal component.