Formaldehyde-free, accelerated cure, aqueous composition for bonding glass fiber heat-resistant nonwovens
US5977232A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1997 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Aug 1, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K1/0346
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A formaldehyde-free curable aqueous composition comprising: PA1 (a) a polyacid comprising at least two carboxylic acid groups, anhydride groups, or salts of the polyacid thereof; PA1 (b) an active hydrogen compound containing at least two active hydrogen groups selected from the group consisting of hydroxyl, primary amino, secondary amino, and mixtures thereof; and PA1 (c) a fluoroborate accelerator; wherein the ratio of the number of equivalents of said carboxylic acid groups, anhydride groups, or salts thereof to the number of equivalents of said hydroxyl groups is from 1/0.01 to about 1/3, and wherein said carboxylic acid groups, anhydride groups, or salts thereof are neutralized to an extent of less than 35% with a fixed base is disclosed. A method for curing formaldehyde-free polyacids and a method for bonding glass fiber heat-resistant nonwovens with a formaldehyde-free binder are further disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.