Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Patent
1997-07-25
1999-09-28
Marquis, Melyvyn I.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From phenol, phenol ether, or inorganic phenolate
523414, 525523, 525529, 528 91, 528110, C08G 5944
Patent
active
059590610
ABSTRACT:
Water-dispersible curing agents for epoxy resins are disclosed which, as a mixture with epoxy resins, have a potlife indication by showing the end of the processing time by a clear increase in viscosity, and which comprise reaction products (ABC) of adducts of aliphatic polyols (A) with a weight-average molar mass of from 200 to 20, 000 g/mol, comprising at least one polyol (A1) having a molar mass of less than 4000 g/mol, and at least one polyol (A2) having a molar mass of more than 4000 g/mol, and at least one epoxide compound (B) having at least two epoxide groups per molecule, and a specific epoxide group content of from 500 to 10 000 mmol/kg, (A1) and (A2) being reacted separately or as a mixture with (B), and then reacting this adduct with one or more polyamines (C) having at least three amine hydrogen atoms and at least one primary amino group per molecule, the ratio of the number of hydroxyl groups of component (A) to the number of epoxide groups of component (B) being 1:3 to 1:10, and the ratio of the number of remaining epoxide groups in the epoxide-polyol adduct to the number of amine hydrogen atoms in polyamines (C) being 1:1.5 to 1:100. The water-dispersible curing agents are useful as curing agents for epoxy resins in two component coating compositions.
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Gerlitz Martin
Neumann Uwe
Aylward D.
Marquis Melyvyn I.
Vianova Resins GmbH
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