Primer compositions for injection molding

A process for forming an injection molding about an article, comprising the steps of (a) disposing into an injection molding cavity an article about which a thermoplastic, plastic material is to be molded into a shape;

• and (b) injecting into the injection molding cavity in which is disposed the article, the thermoplastic material at a temperature and pressure to permit the material to flow around and about the article in the mold and maintaining the mold under a temperature and pressure appropriate to permit the thermoplastic material to solidify, wherein prior to disposition of the article, the article is primed with a curable primer composition of (a) a curable (meth)acrylate component;
• (b) a cure initiating component;
• and (c) a polymer material selected from the group consisting of:
• i. block polymers represented by S-A-S wherein S is polystyrene and A stands for a polymer or copolymer formed from one or more of ethylene, propylene, butylene and styrene, which are optionally substituted with carboxylic acid or maleic anhydride;
• provided that when A comprises styrene then A is a copolymer of styrene with at least one of ethylene, propylene and butylene, and is optionally substituted with carboxylic acid or maleic anhydride;
• and ii. polystyrene-poly(ethylene-propylene) (“SEP”);
• and iii. any combination of said polymer materials and exposed to radiation in the electromagnetic spectrum appropriate to cure the composition, wherein the polymer material comprises about 10 to about 70 weight percent styrene based on the total weight of the polymer material.