Patent
Method for impact modification of ethylenically unsaturated nitrile polymers and polymer blends produced thereby
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TLDR
In this paper, a graft copolymer is grafted with a second monomer formulation containing at least 60 percent by weight of ethylenically unsaturated nitrile monomers.Abstract:
A polyblend with good impact properties, good light stability, good heat stability, low water vapor transmission and low oxygen permeability has a polymerization graft component with a rubbery substrate and a composite superstrate. Initially, the rubbery substrate is grafted with a monomer mixture containing little or no nitrile monomer and generally comprised of monomers selected from the group consisting of monovinylidene aromatic hydrocarbon, alkyl esters of unsaturated carboxylic acids, unsaturated carboxylic acids, vinyl alkanoates and vinyl ethers. Thereafter, the resultant graft copolymer is admixed and grafted with a second monomer formulation containing at least 60 percent by weight of ethylenically unsaturated nitrile monomers. The resultant composite graft copolymer is then blended with a matrix of an ethylenically unsaturated nitrile polymer to provide the desired impact modified polymer blends.read more
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TL;DR: An intermediate for use in a polyblend consisting essentially of a copolymer of monoalkenyl aromatic monomer such as styrene and a ethylenically unsaturated nitrile monomer, such as acrylonitrile surface grafted onto rubber which is dispersed in a matrix copolym of the graft copolymers, the dispersed phase being monomodal in particle size distribution.
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Method for manufacture of acrylonitrile-butadiene-aromatic vinyl resinous compositions
Morikawa Hisashi,Yoshino Masaaki +1 more
TL;DR: Graft polymers containing 17-33% of acrylonitrile, 18-36% of butadiene and 65-31% of a vinyl aromatic component are made by graft polymerizing in the presence of a catalyst system acrylatitrile and vinyl aromatic monomer on to a latex of a butane-styrene copolymer which contains 17-24% of styrene and which contains no gel or, if any, highly swelling gel, the latex particles having an average diameter of 0.1 to 1.0m.