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...
Patent
1996-08-05
1998-04-14
Gorr, Rachel
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 77, C08G 1810
Patent
active
057392471
ABSTRACT:
The present invention is directed to the production of molded polyurethane products having high flexural moduli (i.e. 1,000,000 psi or more) and high elongation wherein a reaction mixture is reacted in a closed mold. The reaction mixture comprises reacting a liquid, room temperature stable, isocyanate prepolymer with at least two hydroxy-functional polyethers having average hydroxyl functionalities of from 1.5 to 8 and number average molecular weights of from 350 to 1800, at least one hydroxyl functional organic material containing from 2 to 8 hydroxyl groups and having a number average molecular weight below 350 and at least two hydroxyl functional organic materials having average hydroxy functionalities of from 1.5 to 3 and having number average molecular weights of 4000 or more. The products are prepared from these processes using such specified isocyanate prepolymers and polyol blends.
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Journal of Cellular Plastics, Sep./Oct. 1981, pp. 268-273.
Lesko Merle W.
Parks Kristen L.
Bayer Corporation
Cheung Noland J.
Gil Joseph C.
Gorr Rachel
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