Thermoplastic elastomers with improved abrasion resistance
AssigneeThe B.F. Goodrich Company
InventorsWilliam S. Greenlee, Josef C. Vyvoda, Roman W. Wypart
Life of this patent
Estimating the term…
Abstract
In a preferred embodiment, the invention herein relates to blends of a PVC-containing thermoplastic material and an impact modifier which blends have improved abrasion resistance and a reduced adhesion to glass, said impact modifier has Shore A hardness greater than 70 and is used in an amount of greater than 50 weight parts per 100 weight parts of said thermoplastic material.
Claims16
A composition having improved abrasion resistance comprising a thermoplastic material and greater than 20 weight parts of an impact modifier per 100 weight parts of said thermoplastic material, said impact modifier has Shore A hardness greater than 40, said impact modifier contains 5-40% by weight polymerized acrylonitrile;
- said abrasion resistance of said composition devoid of a filler is 0.1433 or less, as measured by the Tabor Abrasion Test using a H-18 wheel;
- and said thermoplastic material is selected from the group consisting of polyvinyl chloride homopolymers, vinyl chloride polymerized with up to 70 weight percent of at least one copolymerizable comonomer, polyvinyl chloride-poly(ethylene-vinyl acetate) grafts.
A composition having improved abrasion resistance comprising vinyl chloride polymer and an impact modifier containing 5-40% by weight polymerized acrylonitrile;
- amount of said impact modifier is greater than 20 weight parts per 100 weight parts of said vinyl chloride polymer;
- said impact modifier has Shore A hardness greater than 60;
- and said abrasion resistance of said composition devoid of a filler is 0.1433 or less as measured by the Tabor Abrasion Test using an H-18 wheel.
A composition having improved abrasion resistance comprising vinyl chloride polymer and an impact modifier comprising polymerized acrylonitrile and polymerized styrene;
- amount of said impact modifier is greater than 20 weight parts per 100 weight parts of said vinyl chloride polymer;
- said impact modifier has Shore A hardness greater than 60;
- and abrasion resistance, of said composition devoid of filler is 0.1433 or less, as measure by the Tabor Abrasion Test using an H-18 wheel.
A composition having improved abrasion resistance consisting essentially of vinyl chloride polymer and greater than 20 weight parts impact modifier per 100 weight parts of said vinyl chloride polymer;
- abrasion of said composition devoid of filler is 0.1433 or less, as measured by the Tabor Abrasion Test using an H-18 wheel;
- said vinyl chloride polymer is selected from vinyl chloride homopolymers and vinyl chloride copolymers copolymerized with at lest on comonomer;
- and said impact modifier comprises polymerized acrylonitrile and polymerized styrene.
Dependencies are inferred from the claim text.