Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From silicon reactant having at least one...
Patent
1988-08-03
1990-10-02
Bleutge, John C.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From silicon reactant having at least one...
528 25, 528 28, 528 29, 556420, 556421, C08G 7706
Patent
active
049608444
ABSTRACT:
A liquid polymer which is rapidly curable, at room temperature, to a solid hydrolytically stable elastomer having high tensile and tear strengths, said liquid polymer having the formula: ##STR1## wherein R is a liquid polymeric backbone selected from the group consisting of polyether and polythioether, said backbone having a number average molecular weight of at least 1,500 and having no carboxyl or hydroxyl groups; R.sup.1 is lower alkyl, R.sup.2 is lower alkyl, R.sup.3 is a divalent organic radical having no sulfur atoms, R.sup.4 is alkylene of from 3 to 6 carbon atoms, and which separates the oxygen atom from X by at least 3 carbon atoms, X is sulfur or --S--R.sup.5 --S-- wherein R.sup.5 is alkylene having from 2 to 12 carbon atoms, alkylene thioether of from 4 to 12 carbon atoms or hydrocarbon ether of from 4 to 20 carbon atoms, p is 2 to 4, m is 1 to 3, n is 0 to 2 and the sum of m and n is 3. There is also disclosed a method for curing such liquid polymers.
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Bleutge John C.
Dean Jr. Ralph H.
Products Research & Chemical Corporation
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