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US 4,240,852 AGranted
Method of bonding urethane formulations to rubber
AssigneeSynair Corporation
InventorsEdward N. Gomberg, Dana W. Somesla
Life of this patent
Estimating the term…
Abstract
A method wherein uncured urethane formulations are bonded to a cured rubber or synthetic rubber substrate in such a manner so as to provide greater bonding strength than has been achieved previously in urethane formulation bonding to rubber or synthetic rubber.
Claims5
A method of bonding uncured urethane formulation to a cured rubber substrate comprising the steps of:
- (a) cleaning the substrate surface;
- (b) coating the cleaned substrate surface with a liquid cyanoacrylate adhesive;
- (c) coating the substrate surface, wetted with the cyanoacrylate adhesive, with a liquid or paste urethane formulation while the adhesive is still wet;
- and
- (d) permitting the urethane formulation to cure.
2 more elements
A method of recapping a rubber tire with a urethane formulation, comprising the steps of:
- (a) buffing down the tire casing surface to remove old tread and cleaning said surface of extraneous materials;
- (b) coating the buffed tire casing surface with a liquid cyanoacrylate adhesive to wet said surface with adhesive;
- (c) applying an initial liquid or paste coating of an uncured urethane formulation onto said surface while said surface is still wet with the cyanoacrylate adhesive;
- (d) placing said tire in a mold having an interior configuration of the desired shape of the recapped portion of the tire;
- (e) injecting additional liquid or paste urethane formulation into said mold before the initial urethane has cured and filling the interior cavity of the mold;
- (f) removing the recapped tire from the mold as soon as the urethane formulation has set;
- and
- (g) allowing said urethane formulation to cure.
5 more elements
Dependencies are inferred from the claim text.