Crushed foam coated leather and leather-like materials
AssigneeRohm and Haas Company
InventorsJohn G. Brodnyan, Donald F. Holloway, Stanley Le Sota
Life of this patent
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Abstract
Crushed foam coated leather and leather-like materials characterized by excellent foam adherence, are prepared by flowing foamed compounded polymeric latices into contact with a leather or leather-like substrate and partially drying same, followed by compressive crushing of the dried foam, plating or embossing to achieve optimum adhesion, and further heating and curing to develop maximum physical properties.
Claims12
A method for preparing crushed foam coated leather and leather substitutes which comprises:
- A. foaming a latex composition prepared from monomers of the following groups:
- i. 20-90% by weight of butyl acrylate, 2-ethylhexyl acrylate or ethylene;
- ii. 40-95% by weight of ethyl acrylate or vinyl chloride;
- iii. 20-50% by weight of methyl methacrylate, acrylonitrile, styrene or vinylidene chloride;
- iv. 10-30% by weight of methyl acrylate or butyl methacrylate;
- v. 0.1-5% by weight of acrylic acid, itaconic acid or methacrylic acid;
- and
- vi. 3-7% by weight of hydroxyethyl methacrylate, methylol acrylamide, acrylamide, methylol methacrylamide or acrolein, or any mixtures thereof;
- the sum of i-vi being 100%;
- B. coating the foam on a leather or leather substitute at a thickness in the range of from 5 to 60 mils;
- C. partially drying the foam at a temperature in the range of from 120.degree. to 400.degree. F. but short of curing the foam;
- and simultaneously or separately:
- D. crushing the partially dried foam coating to a thickness of about 3-25 mils and such that the crushed foam coating has minimal bounce back and good pattern definition upon embossment;
- E. embossing and curing the crushed foam coated leather or leather substitute at a pressure in the range of from about 50 to 2,000 psi at a temperature in the range of from 100.degree. to 350.degree. F.
A leather or leather substitute which has a crushed foam coating of a latex composition containing a copolymer prepared from monomers of the following groups:
- i. 20-90% by weight of butyl acrylate, 2-ethylhexyl acrylate or ethylene;
- ii. 40-95% by weight of ethyl acrylate or vinyl chloride;
- iii. 20-50% by weight of methyl methacrylate, acrylonitrile, styrene or vinylidene chloride;
- iv. 10-30% by weight of methyl acrylate, butyl methacrylate;
- v. 0.1-5% by weight of acrylic acid, itaconic acid or methacrylic acid;
- and
- vi. 3-7% by weight of hydroxyethyl methacrylate, methylol acrylamide, acrylamide, methylol methacrylamide or acrolein, or any mixtures thereof;
- the sum of i-vi being 100%;
- said crushed foam coating having a thickness of about 3-25 mils, minimal bounce back and good pattern definition upon embossment.
Dependencies are inferred from the claim text.