US2004054085A1PendingUtilityA1

Pvc alloy for use in air bag doors

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Priority: Sep 10, 2001Filed: Sep 10, 2001Published: Mar 18, 2004
Est. expirySep 10, 2021(expired)· nominal 20-yr term from priority
Inventors:William J. Tansey
C08L 27/06C08L 23/16B29L 2031/3008C08L 23/28C08L 23/10C08K 5/0016C08L 2207/04B29C 41/003B29C 41/18C08L 2205/22
38
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Claims

Abstract

A thermoplastic alloy of a melt processible crosslinked olefin thermoplastic elastomer dispersed in a PVC matrix. Improved compatibility of the alloyed components may be achieved through the use of a chlorinated olefin thermoplastic elastomer. The thermoplastic alloy is characterized by lessened mechanical deterioration from heat aging, and improved performance under low temperature conditions.

Claims

exact text as granted — not AI-modified
What is claimed is:  
     
         1 . A thermoplastic alloy comprising a poly(vinyl chloride) resin and an olefin based thermoplastic elastomer, wherein said olefin based thermoplastic elastomer is cross-linked, and the alloy is melt processible.  
     
     
         2 . The thermoplastic alloy according to  claim 1  wherein said poly(vinyl chloride) resin comprises a plasticized poly(vinyl chloride) resin.  
     
     
         3 . The thermoplastic alloy according to  claim 1  wherein said olefin based thermoplastic elastomer comprises a chlorinated olefin material.  
     
     
         4 . The thermoplastic alloy according to  claim 3  wherein said chlorinated olefin material is present between about 10-75% by weight of the thermoplastic alloy.  
     
     
         5 . The thermoplastic alloy according to  claim 4  wherein said chlorinated olefin material is present between about 10-25% by weight of the thermoplastic alloy.  
     
     
         6 . The thermoplastic alloy according to  claim 1  wherein said olefin based thermoplastic elastomer is present as dispersed particles within the poly(vinyl chloride) matrix.  
     
     
         7 . The thermoplastic alloy according to  claim 1  wherein the tensile strength of said alloy does not change by more than about +/−35% after 500 hours of heat aging at 110° C.  
     
     
         8 . The thermoplastic alloy according to  claim 1  wherein the tear strength of said alloy does not change by more than about +/−35% after 500 hours of heat aging at 110° C.  
     
     
         9 . The thermoplastic alloy according to  claim 1  wherein the elongation of said alloy does not change by more than about +/35% after 500 hours of heat aging at 110° C.  
     
     
         10 . The thermoplastic alloy according to  claim 1  wherein the tensile strength of said alloy does not change by more than about +/−45% after 1000 hours of heat aging at 110° C.  
     
     
         11 . The thermoplastic alloy according to  claim 1  wherein the tear strength of said alloy does not change by more than about +/−45% after 1000 hours of heat aging at 110° C.  
     
     
         12 . The thermoplastic alloy according to  claim 1  wherein the elongation of said alloy does not change by more than about +/−45% after 1000 hours of heat aging at 110° C.  
     
     
         13 . A slush moldable thermoplastic alloy comprising a cross-linked olefin based thermoplastic material dispersed in a matrix of a poly(vinyl chloride) resin, wherein said slush moldable alloy is present as spherically fused particles having a size distribution between 0.007 inches and 0.040 inches.  
     
     
         14 . The slush moldable alloy according to  claim 13  wherein said olefin based thermoplastic material comprises a chlorinated olefin.  
     
     
         15 . The slush moldable alloy according to  claim 13  wherein said poly(vinyl chloride) resin comprises a plasticized poly(vinyl chloride) resin.  
     
     
         16 . The slush moldable alloy according to  claim 13  wherein the tensile strength of said alloy does not change by more than about +/−35% after 500 hours of heat aging at 110° C.  
     
     
         17 . The slush moldable alloy according to  claim 13  wherein the tear strength of said alloy does not change by more than about +/−35% after 500 hours of heat aging at 110° C.  
     
     
         18 . The slush moldable alloy according to  claim 13  wherein the elongation of said alloy does not change by more than about +/−35% after 500 hours of heat aging at 110° C.  
     
     
         19 . The slush moldable alloy according to  claim 13  wherein the tensile strength of said alloy does not change by more than about +1-45% after 1000 hours of heat aging at 110° C.  
     
     
         20 . The slush moldable alloy according to  claim 13  wherein the tear strength of said alloy does not change by more than about +/−45% after 1000 hours of heat aging at 110° C.  
     
     
         21 . The slush moldable alloy according to  claim 13  wherein the elongation of said alloy does not change by more than about +/−45% after 1000 hours of heat aging at 110° C.

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