Abrasion resistant elastomeric composition
OwnerMichael A. Pellicoinventor
Life of this patent
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Abstract
By blending and mixing an elastomeric block copolymer such as polystyrene-polyisoprene-polystyrene block copolymers, finely divided siliceous material such as silica and/or clay having a specific gravity from about 2.40 to about 2.66, and a solvent for the block copolymer, there is obtained a thick, extrudable, workable, paste-like material which, upon application and evaporation of the solvent, sets to an abrasion and peel resistant elastomer. The compositions, which may be further formulated with pigmentary filler, are particularly well suited for repairing the worn heel and toe portions of tennis shoes.
Claims11
Abrasion resistant elastomeric compositions for filling, sealing and coating, comprising:
- from about 10 to about 50 wt.% of an elastomeric block copolymer selected from the group consisting of polystyrene-polybutadiene-polystyrene copolymer, polystyrene-polyisoprene-polystyrene copolymer and mixtures of said copolymers, wherein the average molecular weight for each polystyrene block is from about 2,000 to about 100,000, and the average molecular weight for each of said polybutadiene and polyisoprene blocks is from about 25,000 to about 1,000,000;
- from about 10 to about 40 wt.% of silica having a specific gravity from about 2.40 to about 2.66;
- and
- a solvent for the elastomeric block copolymer to make up 100 wt.% of the composition, with the concentration of said solvent in said composition being at least about 20 wt.%.
A method for preparing abrasion resistant elastomeric compositions adapted for filling, sealing and coating, which comprises blending and mixing:
- from about 10 to about 50 wt.% of an elastomeric block copolymer selected from the group consisting of polystyrene-polybutadiene-polystyrene copolymer, polystyrene-polyisoprene-polystyrene copolymer, and mixtures of said copolymers, wherein the average molecular weight for each polystyrene block is from about 2,000 to about 100,000, and the average molecular weight for each of said polybutadiene and polyisoprene blocks is from about 25,000 to about 1,000,000;
- from about 10 to about 40 wt.% of silica having a specific gravity from about 2.40 to about 2.66;
- and
- a solvent for the elastomeric block copolymer to make up 100 wt.% of the composition, with the concentration of said solvent being at least about 20 wt.%;
- said wt.% being based on the weight of the total composition.
Dependencies are inferred from the claim text.