Patent ID: 8293322
Filing Date: 2012-10-23
Classification: B29C,B29K,C08G,C08J,C08L,Y10T

Abstract:
1. A process for preparing a reinforced resin material comprising the steps of: providing an inorganic substrate; applying to the inorganic substrate a sizing composition comprising a coupling activator compound of the formula: wherein S represents a silane coupling moiety capable of bonding with the surface of the inorganic substrate, and A represents a ring-opening polymerization activator moiety, or blocked precursor thereof; which is capable of participating in an in situ ring-opening polymerization of a monomer in the presence of a polymerization catalyst when exposed to ring-opening polymerization conditions, and X represents a linking moiety capable of linking the S moiety and the A moiety, and wherein the coupling activator compound is a sole initiator in the in situ ring-opening polymerization reaction; mixing the sized inorganic substrate with a monomer and a ring-opening polymerization catalyst to form a polymerization mixture, wherein the monomer is a lactam or lactone having 3-12 carbon atoms in the main ring; and exposing the polymerization mixture to conditions sufficient to cause the in situ ring-opening polymerization of the monomer to form a reinforced resin in which the inorganic substrate is grafted onto a polymer, wherein the polymerization is anionic ring-opening polymerization.