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
1999-10-19
2001-11-20
Moore, Margaret (Department: 1712)
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...
C524S435000, C524S783000, C524S785000
Reexamination Certificate
active
06319974
ABSTRACT:
INTRODUCTION AND BACKGROUND
The present invention relates to a method for improving the stability of polymers against the action of heat and flames.
The use of pyrogenically produced titanium dioxide in silicone rubber is known (see the publication series Pigmente No. 56 Degussa Aktiengesellschaft 1989, page 27).
SUMMARY OF THE INVENTION
The invention relates to a method for improving the stability of polymers against the action of heat and flames which is carried out by adding a pyrogenically produced titanium dioxide, containing iron oxide in an amount of 0.05 to 50% by weight, to the polymers, before or during the processing.
Silicone rubber, silicone oil, synthetic and/or natural rubbers or gum can be used as polymers in accordance with the present invention.
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DE 4302896, abstract, Aug. 1994.
Deller Klaus
Mangold Helmut
Schachtely Uwe
Scholz Mario
Degussa - AG
Moore Margaret
Smith , Gambrell & Russell, LLP
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