Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1982-01-29
1983-05-10
Welsh, Maurice J.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528 96, 528 99, 544401, 564388, C08G 6700
Patent
active
043831028
ABSTRACT:
An improved method for the production of polyols useful in the application of sprayed high density polyurethane foams is described. The improvement involves varying the formaldehyde to phenol mole ratio to range between 1.25:1 to 1.75:1 to produce a polyol with the desired viscosity. Ordinarily such polyols are prepared by reacting 4.65 to 5 moles of propylene oxide with 1 mole of the Mannich reaction product of a mole of phenol or nonylphenol with 1 or 2 moles of diethanolamine and 1 or 2 moles of formaldehyde. It is particularly surprising that such changes in the formulation may be made without adversely affecting the resultant properties of the spray foam.
REFERENCES:
patent: 2604399 (1952-07-01), Donovan et al.
patent: 3297597 (1967-01-01), Edwards et al.
patent: 4137265 (1979-01-01), Edwards et al.
McDaniel Kenneth G.
Speranza George P.
Mossman David L.
Park Jack H.
Priem Kenneth R.
Texaco Inc.
Welsh Maurice J.
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