Modified aminoplast, its preparation and its use

US4535031A · kind A · utility

Assignee

• Cassella Aktiengesellschaft · DE

Inventors

• Peter Dorries · Frankfurt am Main, DE
• Thomas Gotze · Neuenhain, DE
• Steffen Piesch · Oberursel, DE
• Manfred Schon · Rodgau, DE
• Gunther Wulff · Hoisdorf, DE
• Karl Hintermeier · Frankfurt am Main, DE

Key dates

• Filing date: Mar 5, 1984
• Grant date: Aug 13, 1985
• Expiry date: Mar 5, 2004

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31957
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Modified aminoplast resin comprising: PA1 (a) 60 to 99.5% by weight of an aminoplast precondensate which has been etherified with a lower alkanol to an extent not exceeding 10% and PA1 (b) 0.5 to 40% by weight of a modifying agent which comprises a mixture of (i) a water-soluble polyester prepared from carboxylic acids with at least one carboxyl and dihydric or polyhydric alcohols, and (ii) sufficient free diol or polyol whereby the mixture has a ratio of the sum of free and esterified hydroxyls of 0.8 to 4.5 moles for each mole of the sum of free and esterified carboxyls which resins are useful in impregnating webs for producing laminates and panels of wood-based materials.