Plastisol composition and container closure gasket made therefrom

Claim 2

A plastisol composition comprising (a) a copolymer resin of a normal α-olefin and maleic anhydride (1:1 mole ratio) having a particle size in the range from about 0.1 to about 1500 microns and having the structure ##STR7## wherein B is a member of the group consisting of ##STR8## and ##STR9## R is II or C x H 2x +1 ' x is 1 to 16 and n is 2-300, and (b) 65-600 parts/100 parts copolymer of a polyepoxide plasticizer.

Claim 3

The composition of claim 1 wherein the epoxy containing plasticizer is epoxidized soybean oil.

Claim 4

The composition of claim 1 including an ionizable metallic compound wherein the metal is selected from Group I, Group II, Group III or Group VIII of the Periodic Table.

Claim 5

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 α-olefin and maleic anhydride (1:1mole ratio) having a particle size in the range from about 0.1 to about 1500 microns and having the structure. ##STR10## wherein B is a member of the group consisting of ##STR11## and ##STR12## R is H or C x H 2x +1 ' x is 1 to 16 and n is 2-300, and (b) 65-600 parts/100 parts copolymer of a polyepoxide plasticizer.

Claim 6

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 α-olefin and maleic anhydride (1:1mole ratio) having a particle size in the range from about 0.1 to about 1500 microns and having the structure. ##STR10## wherein B is a member of the group consisting of ##STR11## and ##STR12## R is H or C x H 2x +1 ' x is 1 to 16 and n is 2-300, and (b) 65-600 parts/100 parts copolymer of a polyepoxide plasticizer.

Claim 7

The container closure of claim 4 wherein the plasticizer is expoxidized soybean oil.

Claim 8

The container closure of claim 4 wherein the composition includes an ionizable metallic compound wherein the metal is selected from Group I, Group II, Group III or Group VIII of the Periodic Table.

Claim 9

The process of forming a solidified, homogeneous mass which comprises admixing a plastisol composition comprising (a) a copolymer resin of a normal α-olefin and maleic anhydride (1:1 mole ratio) having a particle size in the range from about 0.1 to about 1500 microns and having the structure ##STR13## wherein B is a member of the group consisting of ##STR14## and ##STR15## R is H or C x H 2x +1 ' x is 1 to 16 and n is 2-300, and (b) 65-600 parts/100 parts copolymer of a polyepoxide plasticizer and, thereafter, heating the admixture for a time sufficient to flux the mass.

Claim 10

The process of forming a solidified, homogeneous mass which comprises admixing a plastisol composition comprising (a) a copolymer resin of a normal α-olefin and maleic anhydride (1:1 mole ratio) having a particle size in the range from about 0.1 to about 1500 microns and having the structure ##STR13## wherein B is a member of the group consisting of ##STR14## and ##STR15## R is H or C x H 2x +1 ' x is 1 to 16 and n is 2-300, and (b) 65-600 parts/100 parts copolymer of a polyepoxide plasticizer and, thereafter, heating the admixture for a time sufficient to flux the mass.

Claim 11

The process according to claim 7 wherein the plasticizer is an epoxidized soybean oil.

Claim 12

The process according to claim 7 wherein the composition includes an ionizable metallic compound wherein the metal is selected from Group I, Group II, Group III or Group VIII of the Periodic Table.