Binder composition comprises a blend of a high viscosity and low viscosity hydroxypropyl methylcellulose ether, and a tape joint composition containing such binder
US5039341A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 13, 1989 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Nov 13, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0607
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A cellulose ether blend useful as an adhesive in finishing compounds, comprising a high viscosity hydroxypropyl methylcellulose having a viscosity from about 4,000 to about 120,000 cps and a low viscosity hydroxypropyl methylcellulose having a viscosity from about 5 to about 3,000 cps, wherein the hydroxypropyl methylcellulose blend is at least from about 10:1 to about 1:2 high viscosity hydroxypropyl methylcellulose to low viscosity hydroxypropyl methylcellulose. Both the high and low viscosity cellulose ethers have a methoxyl substitution of about 25 to about 32 weight percent and a hydroxypropyl substitution of about 3 to about about 13 weight percent. The cellulosic blend can be used in tape joint compounds, tile adhesives, grouts, spray textures and stucco compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.