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...
Reexamination Certificate
1998-09-15
2001-06-26
Seidleck, James J. (Department: 1711)
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...
C524S483000, C524S515000, C524S543000
Reexamination Certificate
active
06251982
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a compounded rubber composition comprising a polyurethane, an oil and/or a thermoplastic resin. The present invention further relates to the use of the compounded rubber for making molded articles such as hoses, dashboards, covers, grips, handles, footwear or parts thereof.
BACKGROUND OF THE INVENTION
Polyurethane rubbers have broad utility in the fashioning of flexible, strong articles. However, conventional polyurethane elastomers are found to be relatively incompatible with extender oils due to the nature of their polyether or polyester soft segment. Polar oils might be used with these commercial polyurethanes but they soften the rigid urethane hard segments to an unacceptable extent. Therefore, polyether-and polyester-based polyurethane rubbers, while flexible and strong, are relatively hard and are not easily compounded with extender oils.
SUMMARY OF THE INVENTION
The present invention relates to a compounded rubber composition comprising:
(a) a hydrogenated, polydiene diol based polyurethane having a hard segment content of 10% or greater;
(b) a non-polar extender oil in an amount from 10 to 400 phr; and/or
(c) one or more thermoplastic resin(s) in an amount from 5 to 100 phr.
REFERENCES:
patent: 4347338 (1982-08-01), Torii et al.
patent: 5925724 (1999-07-01), Cenens et al.
Cenens Jozef Lucien
Coignoul Emanuelle
Kadri Ilham
Masse Michael Alan
Modic Michael John
Rajguru U. K.
Seidleck James J.
Shell Oil Company
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