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US 4,228,256 AGranted
Transparent blends of resinous copolymers and grafted elastomers
AssigneeCY/RO Industries
InventorJoseph M. Schmitt
Life of this patent
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Abstract
The use of a sequential and controlled addition of monomers during grafting to produce grafted elastomers results in blends of the grafted elastomer and a resinuous copolymer which have superior optical properties.
Claims8
A method of preparing a non-agglomerating, readily dispersible grafted rubber comprising:
- (1) placing a rubber latex in a reaction vessel;
- (2) adding thereto one or more monomers to be grafted thereon;
- (3) equilibrating said rubber latex;
- (4) controllably adding to said equilibrated rubber latex and said monomers at least one monomer to be grafted thereon, wherein the addition of said monomer takes at least 15 minutes and is in the substantial absence of added emulsifier;
- during which time a grafting reaction occurs.
2 more elements
Dependencies are inferred from the claim text.