US 11,866,543 B2
Glycidyl (meth)acrylate polymer polyol stabilizers
Rick L. Adkins, Canonsburg, PA (US); and John E. Hayes, Gibsonia, PA (US)
Assigned to Covestro LLC, Pittsburgh, PA (US)
Filed by Covestro LLC, Pittsburgh, PA (US)
Filed on May 6, 2021, as Appl. No. 17/313,122.
Prior Publication US 2022/0356296 A1, Nov. 10, 2022
Int. Cl. C08G 18/83 (2006.01); C08F 283/06 (2006.01); C08F 285/00 (2006.01); C08G 18/08 (2006.01); C08G 18/63 (2006.01); C08G 18/81 (2006.01); C08J 9/02 (2006.01); C08G 101/00 (2006.01)
CPC C08G 18/833 (2013.01) [C08F 283/06 (2013.01); C08F 285/00 (2013.01); C08G 18/14 (2013.01); C08G 18/632 (2013.01); C08G 18/8108 (2013.01); C08J 9/02 (2013.01); C08G 2101/00 (2013.01); C08J 2375/08 (2013.01)] 14 Claims
 
1. A polymer polyol comprising the reaction product of:
(A) a base polyol having a functionality of 2 to 5 and a hydroxyl number of 20 to 150,
(B) a preformed stabilizer comprising the free-radical polymerization product of (1) a macromer, with (2) an ethylenically unsaturated monomer, in the presence of (3) a free-radical polymerization initiator, and, optionally, (4) a polymer control agent, and, optionally, (5) a liquid diluent,
and
(C) an ethylenically unsaturated monomer,
in the presence of
(D) a free-radical polymerization initiator,
and, optionally
(E) a polymer control agent,
wherein the macromer comprises a polyether polyol having (meth)acrylate unsaturation and which comprises the polymerization product of a reaction mixture comprising: (a) a glycidyl (meth)acrylate, (b) a polyether polyol having a hydroxyl number of 10 to 300, a functionality of 2 to 8, and an ethylene oxide content of 2 to 25% by weight, based on the weight of the polyether polyol, and (c) a double metal cyanide catalyst.