Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1983-12-06
1985-07-23
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
521112, 521117, 521121, 521181, C08J 914
Patent
active
045309396
ABSTRACT:
Generally closed cell phenolic foams are prepared which have a K-factor of less than 0.2, preferably from about 0.116 to about 0.170 Btu/hr - .degree.F. - ft - .sup.2 per inch of foam thickness when measured at 24.degree. Centigrade. The foams are prepared from a resole resin which has been stripped to a water level of less than 7 percent by weight, preferably from about 3 to about 6 percent by weight based on resin weight. A viscosity adjusting amount of a solvent, such as phenol, and from about 10 to about 20 weight percent, based on resin weight, of a polyglycol are also part of a foam forming formulation. Conventional surfactants, blowing agents and acidic catalysts are used to prepare the foams. The foams so prepared generally have no tendency to autoxidize when placed in an oven heated to a temperature of 250.degree. Centigrade. The foams so prepared also have enhanced resistance to flame penetration.
REFERENCES:
patent: 2629698 (1953-02-01), Sterling
patent: 2933461 (1960-04-01), Mullen
patent: 3298973 (1967-01-01), Quarles et al.
patent: 4176106 (1979-11-01), Reid
patent: 4202945 (1980-05-01), Leinhardt
patent: 4204020 (1980-05-01), Beale et al.
patent: 4205135 (1980-05-01), Beale et al.
patent: 4219623 (1980-08-01), Sudan et al.
patent: 4247413 (1981-01-01), Beale et al.
Foelak Morton
Howard Dan R.
Kanuch Bruce M.
The Dow Chemical Company
Winkelman Michael L.
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