Sealing compounds
AssigneeBall Corporation
InventorRonald G. Mixell
Life of this patent
Estimating the term…
Abstract
This invention relates to compositions and methods of making compositions useful as sealants in food containers comprising a mixture of SBR polymer, resin, filler, and a solvent, which compositions without the solvent can be stabily stored and shipped in dry form. Also, charcoal can be admixed in situ to protect against taste and odor transfer to foods.
Claims14
A can end sealant composition for food containers which imparts substantially no odor or taste to food packaged in said container consisting essentially of from 80 to 100 parts by weight of styrenebutadiene rubber with from about 20% to 25% bound styrene;
- from about 50 to 80 parts by weight of a resin selected from the group consisting of a coumarone-indene type resin and a polycyclopentadiene, said resin having a melting point from about 100.degree.C. to 145.degree.C, the total amount of said styrene-butadiene rubber and said resin being not more than 160 parts by weight of said composition;
- from about 45-75 parts by weight of a filler having an average particle size of about 10 microns and being selected from the group consisting of silica and clay;
- and about 2 to 5 parts by weight of charcoal to protect against taste and odor transfer to food packaged in said container.
A can end for a food container, said can end having dispersed thereon a can end sealant composition which imparts substantially no odor or taste to food packaged in said container, said sealant composition consisting essentially of from 80 to 100 parts by weight of styrene-butadiene rubber with from about 20% to 25% bound styrene;
- from about 50 to 80 parts by weight of a resin selected from the group consisting of a coumarone-indene type resin and polycyclopentadiene, said resin having a melting point from about 100.degree.C. to 145.degree.C., the total amount of said styrene-butadiene rubber and said resin being not more than 160 parts by weight of said composition;
- from about 45-75 parts by weight of a filler having an average particle size of about 10 microns and being selected from the group consisting of silica and clay;
- and about 2 to 5 parts by weight of charcoal to protect against taste and odor transfer to food packaged in said container.
Dependencies are inferred from the claim text.