Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1986-12-30
1988-03-22
Nielsen, Earl
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
528365, 528374, C08G 5962, C08G 5902
Patent
active
047329580
ABSTRACT:
According to the invention, a relatively low molecular weight epoxy resin is reacted with a hydroxyl group-containing compound in the presence of a bis(trihydrocarbyl phosphine)iminium salt catalyst to produce a high molecular weight fusion reaction product. The process is particularly useful in reacting an epoxy resin having a molecular weight of less than about 500 with bisphenol-A in the presence of a bis(phosphine)iminium halide to produce a fusion reaction product having a molecular weight within the range of about 500 to 7000. The catalyst is relatively water-insensitive, and the reaction can therefore be carried out in the presence of water.
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Corley Larry S.
Jackson Roy J.
Nielsen Earl
Shell Oil Company
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