Process for production of artificial leathers having air permeab

Details Process for production of artificial leathers having air permeab Process for production of artificial leathers having air permeab

1974-06-26

1976-05-25

Anderson, Philip

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156246, 156344, 260 25AY, 264 463, 264 54, 264257, 264DIG5, B29D 2704, B32B 520, B32B 3114

Patent

active

039590496

ABSTRACT:
A process for the production of artificial leathers having excellent air permeability and resembling a natural leather is provided, which comprises incorporating a catalyst, a foam stabilizer and, optionally, a pigment and other additive into an isocyanate-terminated polyurethane prepolymer formed by compounding a polyester diol derived from an aliphatic dicarboxylic acid with an organic polyisocyanate so that the [NCO]/[OH] ratio is within a range of from 2.0 to 4.0, to thereby form a substantially solvent-free paint having a viscosity adjusted to 70 to 1000 poises, coating the paint on a release paper in an amount of 50 to 400 g/m.sup.2, applying the release paper to a substrate, allowing foaming and polymerization reactions to proceed in an atmosphere of a dry-bulb temperature of 40.degree. to 95.degree.C. and a relative humidity of at least 60%, passing the assembly, during the advance of said reactions, between two upper and lower rolls, the clearance of which is so adjusted that the foaming ratio is 2 to 4 in a polyurethane foam layer formed from the polyurethane prepolymer paint coating, further advancing the reactions, and peeling the release paper from the foam layer.

REFERENCES:
patent: 2764565 (1956-09-01), Hoppe et al.
patent: 2850467 (1958-09-01), Livingood
patent: 2956310 (1960-10-01), Roop et al.
patent: 3000757 (1961-09-01), Johnston et al.
patent: 3047449 (1962-07-01), Coble
patent: 3694530 (1972-09-01), Wolfe
patent: 3830760 (1974-08-01), Bengtson

Affiliated with

Also associated with

Rating

Process for production of artificial leathers having air permeab does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for production of artificial leathers having air permeab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for production of artificial leathers having air permeab will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-902853