Binder composition comprises a blend of a high viscosity and low

Details Binder composition comprises a blend of a high viscosity and low Binder composition comprises a blend of a high viscosity and low

1989-11-13

1991-08-13

Hearn, Brian E.

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

106189, C09D10128, C09K 310

Patent

active

050393413

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.

REFERENCES:
patent: 2631082 (1953-03-01), Noyes
patent: 3014808 (1961-12-01), Nyberg
patent: 4373959 (1983-02-01), Socha
patent: 4594108 (1986-06-01), Greminger et al.
patent: 4614545 (1986-09-01), Hess

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