Patent · US Expired

Preparation of aqueous nonwoven binders of low formaldehyde emission on curing based on urea, formaldehyde and glyoxal

US5017641A · kind A · utility

3Cited by

6References

7Claims

0Family size

Assignee

BASF SE

Inventors

Fritz E. Kempter · Mannheim, DE
Franz Matejcek · Lambsheim, DE
Werner Neubach · Ludwigshafen, DE
Klaus Flory · Leimen, DE

Key dates

Filing date	May 2, 1989
Grant date	May 21, 1991
Priority date	—
Expiry date	May 2, 2009

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G12/12
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Aqueous nonwoven binders that give reduced formaldehyde emission on curing are based on condensation products of urea or derivatives thereof, formaldehyde and glyoxal in a molar ratio, based on the solid binder, of from 1.5 to 2.5 moles of formaldehyde and from 0.1 to 0.5 mole of glyoxal per mole of the total urea used.

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