Coating process of elastomeric material
OwnerAlbert Goldstein, Howard I. Podellinventors
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Abstract
A treatment of a shaped flexible elastomer item so as to form a coating of a hydrophilic polymer on the surface of the elastomer. The treatment encompasses cleaning of the elastomer surface, immersion of the elastomer in a concentrated solution of a strong acid such as sulphuric acid, washing, and subsequent dipping of the treated elastomer in a solution of an uncured hydrophilic polymer. The treated elastomer is then held at an elevated temperature for a period of time to cure the polymer coating and to bond the polymer coating to the elastomer.
Claims2
A method of coating of a vulcanized latex rubber product, so as to coat a surface of the product with a hydrophilic poylmer comprising the following steps:
- (1) Clean the product surface by washing;
- (2) Immerse the product into a treatment solution of highly concentrated sulfuric acid solution of a concentration of at least substantially 95% concentration of sulfuric acid;
- (3) Remove the product from the said treatment solution;
- (4) Wash the product surface;
- (5) Immerse the product into a coating solution of a hydrophilic polymer;
- (6) Remove the product from the coating solution;
- and
- (7) Heat the coated product for a period of time;
- in
- which the said treatment solution of sulfuric acid is maintained at a temperature substantially below seventeen degrees Celsius so as to minimize a stiffening effect to the latex rubber product otherwise resulting from the action of the treatment solution on the said product.
Dependencies are inferred from the claim text.