Robert D Borman

US Patent:

40987450, Jul 4, 1978

Filed:

Aug 27, 1975

Appl. No.:

5/608370

Inventors:

Robert F. Borman - Delaware OH

Assignee:

PPG Industries, Inc. - Pittsburgh PA

International Classification:

C08L 6110
C08L 6128

US Classification:

260 293

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.

US Patent:

41645871, Aug 14, 1979

Filed:

Mar 13, 1978

Appl. No.:

5/885849

Inventors:

Robert F. Borman - Delaware OH

Assignee:

PPG Industries, Inc. - Pittsburgh PA

International Classification:

A21D 1002
B65D 8500
B32B 1508

US Classification:

426131

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.