Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1984-07-26
1985-07-09
Nielsen, Earl A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528110, 528361, C08G 5906, C08G 5916
Patent
active
045283567
ABSTRACT:
The present invention is directed to an improved process for preparing higher molecular weight polyepoxides from lower molecular weight polyepoxides which comprises reacting (1) a lower molecular weight polyepoxide, (2) a polyhydric compound, (3) an etherification catalyst and (4) dimethylol propionic acid.
REFERENCES:
patent: 3749758 (1973-07-01), Gannon
patent: 3792112 (1974-02-01), Gannon et al.
Gannon et al., "Resins from Epoxides and Dimethylolproprionic Acid", Chem. Abst. 78, 137439c, (1973).
Nielsen Earl A.
Shell Oil Company
Vance Dean F.
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