Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1994-08-11
1995-12-19
Cain, Edward
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
524254, 524255, 523179, C08K 518
Patent
active
054768918
ABSTRACT:
A flexible, fire-retardant, intumescent composition comprising:
a) an intumescent material;
b) an effective amount of a stabilizing agent; and
c) an organic binder throughout which the intumescent material and stabilizing agent are dispersed, the elastomeric binder being at least partially crosslinked, wherein the stabilizing agent consists essentially of a compound selected from the group consisting of compounds within general formula I ##STR1## wherein R.sup.1 -R.sup.4 inclusive are independently selected from the group consisting of hydrogen and alkyl groups having from 1 to about 5 carbon atoms, with the provisos that:
i) either both of R.sup.1 and R.sup.2, or both R.sup.3 and R.sup.4 are alkyl groups having from 1 to about 5 carbon atoms; and
ii) the stabilizing agent has a melting point ranging from about 105.degree. C. to about 125.degree. C.
The stabilizing agent is present in an amount sufficient to render the composite expansion and compression set properties of the composition after prolonged exposure to oxidative conditions substantially unchanged.
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International Search Report from counterpart application PCT/US94/01747.
Article: Intumescent Coating Systems, Their Development and Chemistry from J. Fire & Flammability, vol. 1 (Apr., 1971) pp. 97-141.
Article: Methods For The Fire Protection Of Plastics And Coatings By Flame Retardant And Intumescent Systems from Progress in Organic Coarings, 11 (1983) pp. 41-69.
**The U.S. equivalent to this cite was provided in the parent case U.S. Pat. No. 4,273,879.
"Wingstay.RTM. 100 AZ" product literature from Goodyear, publication date unknown.
"Wingstay 100 AZ" date sheet.
Cain Edward
Griswold Gary L.
Kirn Walter N.
Minnesota Mining and Manufacturing Company
Pastirik Daniel R.
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