Process for conditioning and stabilizing polyols
AssigneeBayer Aktiengesellschaft
InventorsHans J. Scholl, Hartmut Nefzger, Helmut Reiff, Bernd Quiring
Life of this patent
Estimating the term…
Abstract
Polyols are conditioned and stabilized by mixing them at 0 to 150.degree. C. with from about 0.0001 to about 1% by weight, based on the quantity of polyol, of a silylated acid corresponding to the formula: X--[Si(CH.sub.3).sub.3 ].sub.n in which X represents a neutral acid residue obtained by removal of the acidic hydrogen atoms from an n-basic acid having a maximum pKa value of 3, provided that the n-basic acid is not a hydrohalic acid and n represents an integer of from 1 to 3. The resultant polyol is characterized by good color and activity properties. The stabilized polyols are particularly useful in the production of polyurethanes, particularly polyurethane foams.
Claims5
A process for conditioning and stabilizing polyols comprising mixing a polyol with from about 0.0001 to about 1% by weight, based on the quantity of polyol, of a silylated acid corresponding to the formula:
- X--[Si(CH.sub.3).sub.3 ].sub.n
- in which
- X represents a neutral acid residue obtained by removing acidic hydrogen atoms from an n-basic acid having a maximum pKa value of 3, provided that the n-basic acid is not a hydrohalic acid and
- n represents an integer of from 1 to 3 at a temperature of from about 0.degree. to about 150.degree. C.
Dependencies are inferred from the claim text.