Aqueous polyolefin emulsions and method of forming same
US5242969A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 5, 1991 |
| Grant date | Sep 7, 1993 |
| Priority date | — |
| Expiry date | Sep 5, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2351/06
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An aqueous emulsion for use in forming a sizing coating for treating a surface of a substrate. The emulsion comprises at least one polyolefin having a weight average molecular weight greater than 10,000; an acid material selected from the group consisting of saturated fatty acids, unsaturated fatty acids which do not includ any hydroxyl groups and mixtures thereof; at least one base; optionally, an emulsifying agent; and a sufficient amount of water to form an aqueous phase emulsion comprising from about 10-50% of solid materials. The emulsion is formed by combining the polyolefin with the fatty acid at a temperature higher than the melting point of the polyolefin to form a first mixture, adding to the first mixture a sufficient amount of base to neutralize the polyolefin and the fatty acid together with the water and optionally the emulsifying agent to form a second mixture; stirring the second mixture at an elevated pressure and at a temperature above the melting point of the polyolefin and subsequently cooling the mixture to a temperature below the melting point of the polyolefin. The emulsion is particularly useful as a component of a sizing for coating and protecting glass fib…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.