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US 5,629,383 AGranted
Departiculation
AssigneeNovacor Chemicals (Internatioanal) SA
InventorThomas R. Doyle
Life of this patent
Estimating the term…
Abstract
A stable partially polymerized syrup comprising dispersed rubber-like composite particles in a resin phase may be converted to a metastable syrup in which the rubber-like composite and resin phases are co-continuous by subjecting the stable syrup to high shear under pressure.
Claims10
A process comprising subjecting at least a portion of a stable syrup comprising from 99 to 80 weight % of a continuous resin phase comprising one or more monomers selected from the group consisting of C.sub.8-12 vinyl aromatic monomers which are unsubstituted or substituted by a C.sub.1-4 alkyl radical;
- C.sub.1-8 alkyl esters of acrylic acid or methacrylic acid, maleic anhydride, acrylonitrile and methacrylonitrile;
- and from 1 to 20 weight % of an uncrosslinked discontinuous rubber-like composite phase wherein the rubber is selected from the group consisting of:
- (i) co- or homopolymers of C.sub.4-6 conjugated diolefins;
- (ii) random, block and tapered copolymers comprising from 10 to 80 weight % of one or more C.sub.8-12 vinyl aromatic monomers which are unsubstituted or substituted by a C.sub.1-4 alkyl radical and from 20 to 90 weight % of one or more C.sub.4-6 conjugated diolefins;
- and
- (iii) copolymers comprising from 20 to 50 weight % of one or more of acrylonitrile and methacrylonitrile and from 50 to 80 weight % of one or more C.sub.4-6 conjugated diolefins,
- to a pressure of greater than 200 psi and a high shear rate to cause said discontinuous rubber-like phase in said portion of said stable syrup to become a co-continuous phase.
4 more elements
Dependencies are inferred from the claim text.