Food or edible material: processes – compositions – and products – Packaged or wrapped product – Canned
Patent
1978-03-13
1979-08-14
Dixon, Jr., William R.
Food or edible material: processes, compositions, and products
Packaged or wrapped product
Canned
220458, 428 35, 428458, 428460, 428461, A21D 1002, B65D 8500, B32B 1508
Patent
active
041645871
ABSTRACT:
Water-borne or aqueous coating compositions which are especially suitable for use as bondable base coats and size coats in three piece, tin-free steel beverage containers comprise blends of an aqueous dispersion of an amine solubilized interpolymer with aldehyde condensation resins. The interpolymer is prepared in the absence of mercaptans, external surfactants and external dispersion stabilizers and is formed from substituted carboxylic acid amide units; ethylenically unsaturated acid units; hardening units from monomers such as styrene, vinyl toluene or alkyl methacrylate having from 1 to 4 carbon atoms and flexibilizing units from certain alkyl acrylates or methacrylates. The interpolymers are solubilized by neutralizing or partially neutralizing the acid units of the interpolymer with monomeric amines. Aldehyde condensation resins, such as phenol aldehyde resins, aminoplast resins or mixtures thereof are especially desirable. These compositions provide three piece beverage containers with cured base coats and size coats which exhibit excellent adhesion to both the tin-free steel metal and the adhesive employed in forming the container. In addition, the cured base coats and size coats formed from these compositions do not impart undesirable turbidity or taste characteristics to beverages packaged therein.
REFERENCES:
patent: 3991216 (1976-11-01), Christenson et al.
patent: 4065415 (1977-12-01), Christenson et al.
patent: 4075141 (1978-02-01), Porter, Jr. et al.
patent: 4079027 (1978-03-01), Phillips et al.
patent: 4105615 (1978-08-01), Balatan
Dixon Jr. William R.
PPG Industries Inc.
Wilson Charles R.
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