Base coatings for use on vacuum metallized paper

Details Base coatings for use on vacuum metallized paper Base coatings for use on vacuum metallized paper

1982-04-26

1984-02-28

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 32, 524 40, 427250, 427326, 427391, 427404, 106195, 428463, B05D 306, G02B 1700

Patent

active

044342594

ABSTRACT:
Improved base coatings for use on paper substrates to be vacuum metallized consist essentially of an organic solvent solution (e.g. ethyl acetate or ethyl acetate/toluene) containing about 10-30 wt. % of a film-forming coating mixture of (a) about 90-98 wt. % of a vinyl acetate/acrylic acid copolymer (97.5-99/1-2.5%) or a vinyl acetate/monoethyl maleate copolymer (94-97/3-6%) and (b) about 2-10 wt. % of a soluble nitrocellulose resin solids, the resin being soluble in the solvent and having a nitrogen content of about 12 wt. % and a viscosity of from about 4-5 sec. in a 25% solution to about 3-4 sec. in a 20% solution of ethyl alcohol/toluene/ethyl acetate (25/55/20), when measured using the Falling Ball method.
Paper products coated with the base coating (about 2-6 lbs./3000 ft..sup.2) are characterized by a balanced combination of alkali removability, water-resistance, and block-resistance. The metallized products are smooth and glossy, and the aluminized product is especially useful for bottle labels.

REFERENCES:
patent: 2137377 (1938-11-01), Bauer et al.
patent: 2150058 (1939-03-01), Frazier
patent: 2860110 (1958-11-01), Godshalk
patent: 3677792 (1972-07-01), Best
patent: 4177310 (1979-12-01), Steeves
patent: 4363851 (1982-12-01), Mishina et al.

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