Hydroxypropyl methyl cellulose ethers useful as suspending agent

Details Hydroxypropyl methyl cellulose ethers useful as suspending agent Hydroxypropyl methyl cellulose ethers useful as suspending agent

1985-02-28

1986-09-16

Griffin, Ronald W.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

536 91, C08K 504, C08L 128, C08L 2706

Patent

active

046123458

ABSTRACT:
Hydroxypropyl methyl cellulose ethers having methoxyl substitution of from 21 to 35 percent and hydroxypropoxyl substitution of from 15 to 35 percent, are useful as suspending agents for the suspension polymerization of vinyl chloride to produce homo- and copolymers of controlled particle size and high porosity. The hydroxypropyl methyl cellulose ethers having the foregoing substitution levels and an average (number) molecular weight less than 50,000 and those having a methoxyl substitution of greater than 24 percent when the average (number) molecular weight equals or exceeds 50,000, are novel compounds.

REFERENCES:
patent: 2949452 (1960-08-01), Savage
patent: 3388082 (1968-06-01), Rodgers et al.
patent: 3917548 (1975-11-01), Harrington
patent: 4389393 (1983-06-01), Schor et al.
patent: 4446261 (1984-05-01), Yamasaki et al.

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