Method of preparing composite sheet material

Details Method of preparing composite sheet material Method of preparing composite sheet material

1978-09-07

1979-10-16

Lusignan, Michael R.

Coating processes

Foraminous product produced

Microporous coating

260 18TN, 260 22TN, 260 292TN, 427392, 427439, 428904, 427342, B05D 500, B05D 302, B05D 118

Patent

active

041713915

ABSTRACT:
A method of preparing a composite sheet material having properties similar to leather is provided. At least a portion of a porous sheet material is impregnated with an aqueous ionic dispersion of a polyurethane polymer. The polyurethane polymer which is impregnated in the porous sheet is ionically coagulated from the dispersion. Preferably, both the ionic dispersing and coagulating media are removed from the impregnated sheet. The impregnant is then dried to form a composite sheet material.

REFERENCES:
patent: 3384502 (1968-05-01), Japs
patent: 3412054 (1968-11-01), Milligan et al.
patent: 3526531 (1970-09-01), Asano et al.
patent: 3527653 (1970-09-01), Sommer et al.
patent: 3743530 (1973-07-01), Oohara et al.
patent: 3772059 (1973-11-01), Shikada
patent: 4066591 (1978-01-01), Scriven et al.

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