Polyolefin grafted with polycarboxylic acid, ester or anhydride and modified with polyhydroxy compound
AssigneeThe Standard Oil Company
InventorGeorge S. Li
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Abstract
Moldable polyolefin compositions exhibiting improved heat distortion and modulus characteristics, and a method of preparing such compositions are described. The method of preparing these polyolefin compositions comprises reacting (a) a graft-modified polyolefin obtained by reacting a polyolefin with an unsaturated polycarboxylic acid, ester or anhydride which is graft-polymerizable therewith, and (b) at least one organic hydroxy compound. These polyolefin compositions can be reinforced with fibers, minerals and fillers for particular applications.
Claims18
A method of preparing polyolefin compositions having improved properties which comprises reacting
- (a) a graft-modified polyolefin obtained by reacting a polyolefin with an unsaturated polycarboxylic acid, ester or anhydride which is graft-polymerizable therewith, and
- (b) at least one organic polyhydroxy compound, the molar ratio of said organic polyhydroxy compound to unreacted unsaturated polycarboxylic acid, ester or anhydride in (a) being at least 5:1.
A method of preparing polypropylene compositions having improved properties which comprises reacting
- (a) a graft-modified propylene polymer obtained by grafting a propylene polymer with from about 0.1 to about 10 weight percent of maleic anhydride, with
- (b) at least one organic polyhydroxy compound, the molar ratio of said organic polyhydroxy compound to unreacted maleic anhydride in (a) being at least 5:1.
Dependencies are inferred from the claim text.