Flexibilized phenol/mercapto resins and their synthesis

Details Flexibilized phenol/mercapto resins and their synthesis Flexibilized phenol/mercapto resins and their synthesis

1987-03-17

1989-02-07

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525131, 525438, 525440, 525450, 525474, 525476, 525535, 525537, 525528, C08G 1806, C08G 5912, C08G 6308, C08G 6346

Patent

active

048032450

ABSTRACT:
Disclosed is a method for improving the flexibility of a phenol or mercapto resin wherein an aliphatic hydroxyl-functional polyol or polyepoxide component is partially capped with a phenol or mercapto capping agent followed by chain extension with a polyisocyanate under reaction conditions wherein said polyisocyanate substantially selectively reacts with aliphatic hydroxyl groups or epoxy groups residual from the prior step of the process. The ratio of components is such that a resin predominating in one or more of the following general structures is produced: ##STR1## where, R and R' each is a phenol functional group or a mercapto functional group,

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