Urethane elastomer for printing belts and process therefor

Details Urethane elastomer for printing belts and process therefor Urethane elastomer for printing belts and process therefor

1981-08-20

1983-09-13

Cockeram, H. S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 64, C08G 1842, C08G 1876, C08G 1832

Patent

active

044043538

ABSTRACT:
A process for making an elastomer for use in printing/drive belts is disclosed wherein a mixture of approximately 2 equivalents of toluene diisocyanate consisting of about 88 wt. % of the 2,4 isomer and 12 wt. % of the 2,6 isomer is reacted with a polyether or polyester having difunctional primary hydroxyl groups to form a prepolymer. The prepolymer is then reacted with a diamine curing agent to form the elastomer.

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"Influence of the Ratio of the Isomers 2,4 and 2,6 TDI on the Viscosity of the Reaction System in the Synthesis of Polyurethanes Foam", by Sosnyagov; Institute Sint. Smol., U.S.S.R., Sint., Fiz.--KHIM--LIM. (1975), 17, 112-114, (Russ.).
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