Storage-stable, phosphorus-modified epoxy resins

Details Storage-stable, phosphorus-modified epoxy resins Storage-stable, phosphorus-modified epoxy resins

1997-03-06

1999-05-04

Krass, Frederick

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

Synthetic resins

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

525523, 525525, 528 89, 528108, 528398, 528400, C08G 5930, C08G 5914, C08G 5940

Patent

active

059004690

ABSTRACT:
The present invention relates to a storage-stable, phosphorus-modified epoxy resin having an epoxide value of 0.05 to 0.6 mol/100 g and comprising 5 to 25% by weight of an ester-anhydride formed from a phosphonic acid diester, phosphinic acid ester or mixture of these esters and phosphorus pentoxide, and to a process for its preparation by reaction of 95 to 75 parts by weight of an epoxy resin (A) having an epoxide value of 0.1 to 0.8 mol/100 g and 5 to 25 parts by weight of the ester-anhydride in the presence or absence of a solvent at -20 to 150.degree. C.

REFERENCES:
patent: 3454683 (1969-07-01), Kampe et al.
patent: 5587243 (1996-12-01), Von Gentzkow et al.

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