Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1992-03-25
1994-06-21
Acquah, Samuel A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
528220, 528271, 528370, 528403, 525437, 525449, 525471, 525523, 525533, C08F 2020
Patent
active
053229070
ABSTRACT:
The invention relates to the use of polyglycidyl compounds as hardeners in powder coating compositions based on polyester resins which react with epoxy groups, which compounds are polyglycidyl esters of formula (I) or (II) ##STR1## wherein in formula (I) R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each independently of one another hydrogen, C.sub.1 -C.sub.4 alkyl or radicals of formula (III) ##STR2## wherein A is a polymethylene group of 2 to 4 carbon atoms, and R.sub.5 and R.sub.6 are each independently of each other hydrogen, C.sub.1 -C.sub.4 alkyl or radicals of formula (III) or, when taken together, are an unsubstituted or a C.sub.1 -C.sub.4 alkyl-substituted methylene or polymethylene group of 2 to 7 carbon atoms, but with the proviso that at least two of the substituents R.sub.1 to R.sub.6 are radicals of formula (III),
and, in formula (II)
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Derwent Abst. 90-134038/18.
Cotting Jacques-Alain
Gottis Philippe
Acquah Samuel A.
Ciba-Geigy Corporation
Teoli, Jr. William A.
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