Cyanoadhesive composition for toy articles
AssigneeMattel, Inc.
InventorAbimael Cordova
Life of this patent
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Abstract
The present invention provides a cyanoacrylate adhesive composition having high shear bond strength, peeling bond strength, tensile strength and impact bond strength and superior wear characteristics particularly in toy applications where hostile play environments demand hot-cold cycle resistance. The cyanoacrylate adhesive composition contains (a) up to 20% by weight of a cyanoacrylate monomer, (b) a styrene-based elastomeric block copolymer, and (c) a specifc solvent which is selected to effect the solution of both components. The invention is also directed to a method of applying the instant adhesives to substrate surfaces.
Claims20
A cyanoacrylate adhesive composition for thermoplastic substrate surfaces comprising a styrenic copolymer resin, an alpha cyanoacrylate, and a high evapoation rate solvent comprised of a high evaporation rate organic co-solvent mixture, said solvent being capable of solubilizing, but non-reactive to, the styrenic copolymer resin and the thermoplastic substrate surface.
A process for applying a coating to a surface comprising the steps of:
- (i) providing a thermoplastic elastomeric resin substrate;
- (ii) contacting the elastomeric substrate surface with an effective amount of an adhesive composition comprising a styrenic copolymer resin, an alpha cyanoacrylate, and a high evapoation rate solvent;
- and
- (iii) curing the applied composition to form an adhesive layer on the elastomeric substrate.
A process for applying an adhesive to a surface of a toy item comprising the steps of:
- (i) providing an elastomeric resin substrate comprised of a high molecular weight styrene-ethylene-butylene-styrene block copolymer in the form of a facial doll element;
- (ii) contacting the elastomeric substrate surface with an effective amount of an adhesive composition comprising a styrenic copolymer resin, an alpha cyanoacrylate, and a high evapoation rate solvent to a surface of the facial doll element;
- and
- (iii) curing the applied composition to form an adhesive layer on the selected surface of the doll face item.
Dependencies are inferred from the claim text.