Phenolic resins

Details Phenolic resins Phenolic resins

1997-09-19

1999-01-26

Glass, Margaret W.

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

Synthetic resins

From silicon reactant having at least one...

556433, 556432, 524837, C08G 7704, C08G 7706

Patent

active

058640002

ABSTRACT:
This invention relates to a hybrid phenolic/polysiloxane resin derivable by (A) reacting a phenolic compound with (a) a siloxane polymer or (b) an aldehyde and (B) reacting the reaction product of stage (A)(a) with an aldehyde, or, (A)(b) with a siloxane polymer to form the hybrid phenolic/polysiloxane resin, said resin having a siloxane content of 1-40% by weight of the total hybrid resin and a viscosity in the range of 100-10000 mPa s. The products derived from the hybrid resins of the present invention have enhanced impact strength; can tolerate higher burst pressures in pipe applications, have improved resistance to hydrolysis and other environmental weathering characteristics; have improved fire stability; and show improved film flexibility in coatings.

REFERENCES:
patent: 2755269 (1956-07-01), Moorhead
patent: 3839236 (1974-10-01), Foley et al.
patent: 3911045 (1975-10-01), Hartmann et al.
patent: 4022753 (1977-05-01), Lohse et al.
patent: 4032511 (1977-06-01), Blount

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