Container closure
AssigneeW. R. Grace & Co.
InventorWalter R. Wszolek
Life of this patent
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Abstract
A plastisol composition containing as the resin component a copolymer of a normal .alpha.-olefin and maleic anhydride (1:1 mole ratio) having the structure ##STR1## WHEREIN B is a member of the group consisting of ##STR2## and the hydrolysis product thereof, ##STR3## R is H or C.sub.x H.sub.2x+1, x is 1 to 16 and n is 2-300, and a plasticizer for said resin component. The plastisol when fluxed can be used as a closure gasket for containers.
Claims2
A container closure comprising a cap having deposited therein a resinous mass functioning as a gasket to seal the container when the closure is in sealing relationship with the container, said resinous mass comprising a fluxed plastisol of a composition comprising (a) a copolymer resin of a normal .alpha.-olefin and maleic anhydride (1:1 mole ratio) having a particle size in the range of from about 0.1 to about 1500 microns and having the structure ##STR7## wherein B is a member of the group consisting of ##STR8## R is H or C.sub.x H.sub.2x+1, x is 1 to 16 and n is 2-300, and (b) about 65 to 600 parts by weight of a polyester plasticizer per 100 parts by weight of the copolymer resin.
Dependencies are inferred from the claim text.