Patent · US Expired

Emulsifier from condensing polyether polyol(s) and polyepoxide

US5925725A · kind A · utility

1Cited by

9References

17Claims

0Family size

Assignee

Vianova Resins AG · DE

Inventors

Armin Pfeil · Kaufering, DE
Dieter Dreischhoff · Wiesbaden, DE
Stefan Petri · Taunusstein, DE
Claus Godau · Kiedrich, DE

Key dates

Filing date	Sep 26, 1996
Grant date	Jul 20, 1999
Priority date	—
Expiry date	Sep 26, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08J2363/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

An emulsifier composition for water-dilutable epoxy resins comprise condensation products of an aliphatic polyol component having a weight-average molar mass (M.sub.w) of from 200 to 20,000 g/mol, where a mass fraction of at least 5%, has a weight-average molar mass (M.sub.w) of at least 4000 g/mol, and an epoxide component having of at least one epoxide compound having at least two epoxide groups per molecule and an epoxide group content of from 500 to 10,000 mmol/kg, the ratio of the number of hydroxyl groups to that of the epoxide groups (OH):(EP) being from 1:3.51 to 1:10. When the emulsifier is used for the preparation of aqueous epoxy resin systems, the end of the pot life is indicated by a sharp rise in viscosity.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.