Patent ID: 6207747
Filing Date: 2001-03-27
Classification: B29C,C08K,G02B,Y10T

Abstract:
A crosslinkable core mixture for a subsequently-cured composite which mixture contains a thermoplastic core polymer, the thermoplastic core polymer having a weight average molecular weight from about 2,000 to about 250,000 daltons, the core mixture comprising(a) a thermoplastic core polymer comprisingi) from 80 to 99.9 weight percent of polymerized units of a C.sub.1 -C.sub.18 alkyl acrylate or mixtures thereof with up to 50 weight percent of the components of (a)(i) of polymerized units of a C.sub.1 -C.sub.18 alkyl methacrylate;ii) from 0.1 to 18.2 weight percent of polymerized units of a functionally reactive monomer, andiii) from 0 to about 10 weight percent of polymerized units of a refractive index increasing monomer selected from styrene, benzyl acrylate, benzyl methacrylate, phenylethyl acrylate or phenylethyl methacrylate;iv) 0.002 to 0.3 weight percent residual molecules of or of decomposition products of an initiator of polymerization, including end groups on the thermoplastic core polymer;v) from 0.2 to 2.0 weight percent of residual molecules of or of decomposition products of a chain transfer agent, including end groups on the thermoplastic core polymer;(b) from 0.1 to 10 weight percent, based on the crosslinkable core mixture weight, of a reactive additive; and(c) from 0.01 to 1.0 weight percent, based on the crosslinkable core mixture weight, of a stabilizer/antioxidant combination comprising 20-80 weight percent, based on the combination, of an organic phosphite which is hydrolytically stable and 80-20 weight percent, based on the combination, of a hindered phenol.