New terpolymer prodn., useful for optical moulding - from acrylated tetra: or hexa:hydro methano:indene cpd., acrylated bis:phenol epoxide and chloro-phenyl acrylate

摘要: New terpolymers (I) are prepd. by polymerising mixts. of 10-60 (wt)% 3a,4,7,7a-tetra- or 3a,4,5,6,7,7a-hexahydro-4,7-methanoinden-5(6)-yl(methyl) (ether) (meth)acrylate(s) formula (II), 20-60% bisphenol (epoxide) di(meth)acrylate(s) (III) and 5-45% chlorophenyl(oxy(hydroxy)alkyl) (meth)acrylate (IV). Z = a single double bond; M -(C(R6)(R7)-, -SO2-, -S-, -O- X H, Me Cl; A -(CHR8-CHR9-O)- -(CH2-CH(OH)-CH2-O)-; R1,R2,R3,R4,R5,R8,R9 R10 independently H Me; R6 R7 Me, Et, cyclohexyl phenyl; n 0-2; 1, 2 3; c g 1-5; d e 0, f 0-4; in the presence polymerisation initiator(s), accelerator(s), opt. additional coinitiator for radiation cure inhibitor(s). USE/ADVANTAGE - claimed making mouldings. They thermosetting transparent plastics with high impact strength refractive index, nD, greater than 1.56 conjunction an Abbe no., nuD, at least 37. useful lightweight optical components, e.g. opto-electronic devices, data stores, waveguides, lenses devies equipment esp. spherical aspherical ocular correction lenses.