Process for the production of sheet-like structures

Details Process for the production of sheet-like structures Process for the production of sheet-like structures

1975-09-23

1977-05-24

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 775AT, 260 775R, C08L 7500

Patent

active

040255794

ABSTRACT:
The present invention relates to a process for preparing elastic laminates by admixing elastomeric granules with a moisture hardenable polyurethane binder and hardening the binder. The binder is formulated to have a workable viscosity at room temperature and to avoid crystallization at temperatures above about 0.degree. C. The binder is the reaction product of polyisocyanates of the diphenyl methane series having at least 20 wt. % of 2,4'-diisocyanatodiphenyl methane and di- and/or trihydroxy polyethers.
The invention also relates to the binder composition itself and a process for preparing it. The binder has a viscosity of about 1000 to 15,000 cP at 20.degree. C and an NCO content of about 5 to 15 wt. %. It is prepared at an NCO to OH ratio of about 2:1 to 15:1 and at about 15.degree. to 100.degree. C.

REFERENCES:
patent: 3344162 (1967-09-01), Rowton
patent: 3874904 (1975-04-01), Orsini et al.

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