| CPC C08G 65/30 (2013.01) [B01D 15/265 (2013.01); B01D 15/422 (2013.01); B01J 20/18 (2013.01); B01J 20/281 (2013.01); C08G 18/0876 (2013.01); C08G 18/63 (2013.01); C08G 65/329 (2013.01); C08G 65/33372 (2013.01); C08G 65/46 (2013.01); B01J 2220/58 (2013.01); C08G 18/633 (2013.01); C08G 2110/0008 (2021.01); C08G 2110/0083 (2021.01)] | 8 Claims |
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1. A continuous process for preparing a copolymer polyol containing a reduced content of residual monomers and volatiles comprising the steps of:
(a) providing at least one copolymer polyol containing a first initial content of residual monomers and volatiles;
(b) providing at least one molecular sieve adsorbent;
(c) contacting the at least one copolymer polyol with the at least one molecular sieve adsorbent for a period of time and at a temperature sufficient for the at least one molecular sieve adsorbent to adsorb at least a portion of the first initial content of residual monomers and volatiles present in the at least one copolymer polyol to reduce the first initial content of residual monomers and volatiles of the at least one copolymer polyol to form at least one copolymer polyol containing a second reduced content of residual monomers and volatiles; and
(d) separating the at least one molecular sieve adsorbent containing a portion of the first initial content residual monomers and volatiles from the at least one copolymer polyol to form at least one copolymer polyol containing a second reduced content of residual monomers and volatiles, wherein:
the at least one molecular sieve adsorbent of the continuous process comprises a composite membrane;
the continuous process comprises contacting the at least one copolymer polyol with the composite membrane of the at least one molecular sieve adsorbent;
the contact time period between the at least one copolymer polyol and the at least one molecular sieve adsorbent portion of the composite membrane is from 15 minutes to 2 hours; and
the contact temperature is at a temperature of from 70° C. to 160° C.
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