Polyurethane elastomer tire fill compositions and method of maki

Details Polyurethane elastomer tire fill compositions and method of maki Polyurethane elastomer tire fill compositions and method of maki

1990-07-13

1991-12-03

Welsh, Maurice J.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528 48, 528 76, 152310, C08L 7504

Patent

active

050701380

ABSTRACT:
A method for making a polyurethane elastomer tire fill composition wherein a mixture of a) a low functionality (2.0-2.3) 4,4'-diphenylmethane diisocyanate, such as a carboiimide-modified (2.0 functionality) 4,4'-diphenylmethane diisocyanate and b) a nonreactive diluent, such as an oil extender, is mixed with a polyol, such as polypropylene oxide triol. The reaction mixture is inserted into a tire casing under pressure and cured therein to form an essentially void-free tire filler. The tire fill composition maintains pressure within the tire during use and has excellent physical and thermal properties. No prepolymer step is necessary in the method.

REFERENCES:
patent: 4081429 (1978-03-01), Alberino et al.

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