Method of reducing syneresis in aqueous compositions
US6602948B2 · kind B2 · utility
4Cited by
13References
10Claims
0Family size
Inventors
Key dates
| Filing date | May 30, 2001 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Jun 16, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for reducing or eliminating syneresis in an aqueous latex composition caused by the flocculation of the latex particles as a result of interaction with hydrophobically modified ethylene oxide based urethane rheology modifiers. The method of the invention involves adding to the aqueous latex composition a molecule containing a single hydrophobic moiety which has a poly-ethylene oxide backbone chain-length of greater than about 5000 Mn. The method of the present invention also increases the viscosity efficiency of the aqueous latex composition by combining a multiphobe with a monophobe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.