Patent · US Expired

Preparation of curable etherified aminoplast resins and of surface coating resins

US4621133A · kind A · utility

2Cited by

2References

7Claims

0Family size

Assignee

BASF SE

Inventors

Harro Petersen · Bischofswerda, DE
Gunther Immel · Weinheim, DE
Wolfram Weiss · Mutterstadt, DE
Horst Schmidt · Bad Endbach, DE
Gerd Busse · Mutterstadt, DE

Key dates

Filing date	Jul 5, 1985
Grant date	Nov 4, 1986
Priority date	—
Expiry date	Jul 5, 2005

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G12/422
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A process for the preparation of curable etherified aminoplast resins based on urea/aldehyde polycondensates, and the preparation of surface coating resins. Urea is first reacted with an .alpha.,.alpha.-dialkylaldehyde, as much as 50 mol % of which may be replaced by formaldehyde, in a molar ratio urea/aldehyde of about 1:2, at from 50.degree. to 120.degree. C., in the presence of an acid and in the presence or absence of an alcohol or of other organic solvents, and the 2-oxohexahydropyrimidine derivative obtained in this cyclocondensation is then condensed with formaldehyde in the presence of one or more alcohols and an acid. These aminoplast resins are useful as both acid-curable resins and as resins for baking finishes.

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