Back to results
US 4,904,728 AGranted
Polymer blends
AssigneeShell Oil Company
InventorEric R. George
Life of this patent
Estimating the term…
Abstract
Non-miscible polymeric blends comprising a major proportion of a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon and lesser amounts of a maleated, partially hydrogenated block copolymer and an alpha-olefin/alpha,beta-ethylenically unsaturated copolymer exhibit improved melt stability and improved toughness and impact strength.
Claims12
A composition comprising a non-miscible uniform blend of, as a matrix and as a major component, a linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon having up to 20 carbon atoms and, dispersed therein,
- (a) about 0.5% by weight to about 10% by weight, based on total composition, of a maleated, partially hydrogenated block copolymer, said block copolymer having at least one at least predominantly polymerized vinyl aromatic compound block and at least one at least predominantly aliphatic polymerized conjugated alkadiene block, said maleated, partially hydrogenated block copolymer containing residual aliphatic block unsaturation from about 0.5% to about 20% of the unsaturation of the aliphatic blocks of said block copolymer, and from about 0.02% by weight to about 20% by weight, based on total block copolymer, of moieties of maleic acid compound grafted to the polymer aliphatic blocks, and
- (b) about 0.1 by weight to about 4% by weight, based on total composition of a polymer of an alpha-olefin and an alpha,beta-ethylenically unsaturated carboxylic acid.
Dependencies are inferred from the claim text.