Treated glass fibers and aqueous dispersion and nonwoven mat of the glass fibers
US4681802A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1986 |
| Grant date | Jul 21, 1987 |
| Priority date | — |
| Expiry date | Feb 28, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/60
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Treated glass fibers having adequate protection for gathering into strands and when chopped being more dispersible in aqueous media. The treated glass fibers have a coating of an aqueous treating composition, wherein the solids have a cationic surfactant having one or more primary, secondary and/or tertiary amine moieties and one or more water dispersible, poly(oxyethylene-oxyalkylene) copolymer having an oxide ratio of about 78 to about 22 to about 99 to about 1 and an average molecular weight of at least 15,000, and one or more polar functional coupling agents. Optionally, the solids may also have one or more starches that are insoluble or only incompletely soluble in cold water. Glass fibers treated with the aqueous treating compositions and produced into wet or dry chopped glass fiber strands having lengths of about 1/16 of an inch (1.58 mm) to about 3 inches (76.2 mm), have good dispersibility in aqueous media with or without addition of dispersing agents. Nonwoven, sheet-like mat is produced from aqueous dispersions having the chopped treated glass fibers, where some of the water is removed and polymeric binders, commonly referred to as wet strength binders, are applied and t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.