Methods for bonding dissimilar synthetic polymeric materials and the products involved in and resulting from such methods

A multi-layered construction of dissimilar synthetic polymeric materials comprising:

• a first layer of a synthetic polymeric composition comprising
• a vinyl resin and at least one plasticizer for said vinyl resin;
• and
• a second layer of a synthetic polymeric composition comprising
• an ultraviolet-radiation cured acrylated polyurethane resin,
• said layers being bonded together by permanent primary chemical bonds formed of reaction products of an organic unsaturated chemical compound soluble or dispersible in said vinyl resin synthetic polymeric composition and of sufficiently low volatility as not to be driven off during heat processing of said multi-layered construction and a polythiol.

A method of forming a multi-layered construction of dissimilar synthetic polymeric materials comprising:

• forming a first layer of a synthetic polymeric composition comprising a vinyl resin, at least one plasticizer for said vinyl resin, an organic unsaturated chemical compound soluble or dispersible in said vinyl resin synthetic polymeric composition and of sufficiently low volatility as not to be driven off during heat processing of said multi-layered construction, and a free radical producer or reaction initiator;
• forming a second layer of a synthetic polymeric composition comprising an ultraviolet-curable acrylated polyurethane resin and a polythiol capable of reacting with said organic unsaturated chemical compound in said first layer;
• and
• exposing said first layer and said second layer to curing conditions, while in contact, for said ultraviolet-curable acrylated polyurethane resin, whereby said organic unsaturated chemical compound reacts with said polythiol to create strong and permanent primary chemical bonds between said layers.