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US 3,945,939 AGranted
Mixtures of high and low molecular weight polyols resistant to phase separation
AssigneeThe Dow Chemical Company
InventorBenny Gene Barron
Life of this patent
Estimating the term…
Abstract
Mixtures of high molecular weight polyols and low molecular weight polyols such as mixtures of glycerine initiated polyoxypropylene glycols and mono- and diethylene glycols are rendered resistant to phase separation upon storage by the addition thereto of from about 0.2% to about 3.0% by weight of colloidal silica or an onium modified clay such as Bentone 27.
Claims12
A composition resistant to phase separation which comprises:
- A. a mixture which is susceptible to phase separation which comprises:
- 1. from about 95% to about 50% by weight of a relatively high molecular weight polyol having an average of from about 2 to about 4 OH groups per molecule and an average OH equivalent weight of from about 650 to about 3000 or mixtures thereof, and
- 2. from about 5% to about 50% by weight of a relatively low molecular weight polyol selected from the group consisting of ethylene glycol, diethylene glycol, tetraethylene glycol, liquid polyoxyethylene glycols, 1,4-butane diol, glycerine and mixtures thereof;
- and
- B. as a compatabilizer for Component A, a minor but effective quantity of colloidal silica, or an onium modified clay or mixtures thereof, present in an amount of from about 0.2% to about 3% by weight of component (A).
2 more elements
Dependencies are inferred from the claim text.