Porous polyurethane sheet

Details Porous polyurethane sheet Porous polyurethane sheet

1995-03-22

1997-07-15

Woodward, Ana

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

4283159, 4283179, 4283184, 4283199, 442 63, B32B 2740

Patent

active

056481519

ABSTRACT:
A porous sheet is obtained by wet coagulating a polyurethane comprising a soft segment component of repeating units from a polycarbonate, those from a diethylene glycol-based polyester and those from a tetramethylene glycol-based polyester and a hard segment component of an aromatic diisocyanate and ethylene glycol. The polyurethane has excellent processability such as wet coagulatability and the obtained porous sheet has good durability and flexibility, in particular flexibility at low temperatures and is well usable for leather-like sheets.

REFERENCES:
patent: 3908060 (1975-09-01), Okazaki et al.
patent: 4746684 (1988-05-01), Kuriyama et al.
patent: 5156900 (1992-10-01), Nishimura
patent: 5520998 (1996-05-01), Uemoto et al.
Patent Abstracts of Japan, vol. 14, No. 423 (C-0757), Sep. 12, 1990, JP-A-2 160 820.
Database WPI, Derwent Publications, AN 93-364973, JP-A-05 270 870, Oct. 19, 1993.
Patent Abstracts of Japan, vol. 14, No. 261 (C-0725), Jun. 6, 1990, JP-A-02 074678, Mar. 14, 1990.

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