Process for the production of laminates

Details Process for the production of laminates Process for the production of laminates

C - Chemistry, Metallurgy

08

G

402/152, 402/160

C08G 18/48 (2006.01) C08G 18/10 (2006.01) C08G 18/76 (2006.01) C08L 75/08 (2006.01)

Patent

CA 1067247

Abstract of the Disclosure 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°C. The binder is the reaction production 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°C and an NCO con- tent 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 to 100°C.

235743

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