Stabilizer, polymer polyol prepared using stabilizer and method for preparing polymer polyol
Disclosed is a polymer polyol stabilizer, prepared by reacting: a polyol having a hydroxyl value of 5 to 100 mgKOH/g and containing ethylene oxide in an amount of 50 wt % or more; and a reactive unsaturated compound having one or more carbon-carbon double bonds and two or more carbon-oxygen double bonds, a polymer polyol polymerized by comprising the polymer polyol stabilizer, and a method for preparing the polymer polyol.
1 . A polymer polyol stabilizer, prepared by reacting:
a polyol having a hydroxyl value of 5 to 100 mgKOH/g and containing ethylene oxide in an amount of 55 to 85 wt; and
a reactive unsaturated compound having one or more carbon-carbon double bonds and two or more carbon-oxygen double bonds.
2 . The polymer polyol stabilizer of claim 1 , wherein the polyol is a polyether polyol having a hydroxyl value of 15 to 60 mgKOH/g.
3 . The polymer polyol stabilizer of claim 1 , wherein the reactive unsaturated compound is at least one selected from the group consisting of maleic acid, fumaric acid, maleic anhydride, itaconic acid, citraconic acid and citraconic anhydride.
4 . A polymer polyol, comprising:
the polymer polyol stabilizer according to claim 1 ;
a polymer derived from an ethylenically unsaturated monomer; and
a base polyol.
5 . The polymer polyol of claim 4 , wherein the ethylenically unsaturated monomer is a combination of an aromatic vinyl monomer and a vinyl cyanide-based monomer.
6 . The polymer polyol of claim 5 , wherein the aromatic vinyl monomer and vinyl cyanide-based monomer are polymerized in a weight ratio of 100:5 to 75.
7 . The polymer polyol of claim 4 , wherein a polymer particle derived from the ethylenically unsaturated monomer having a volume-average particle diameter of 0.5 to 3 μm is dispersed.
8 . The polymer polyol of claim 4 , wherein the base polyol has a hydroxyl value of 200 to 800 mgKOH/g.
9 . The polymer polyol of claim 4 , wherein the base polyol has a viscosity at 25° C. of 200 to 10,000 cps.
10 . The polymer polyol of claim 4 , wherein the solids content is in a range of 30 to 55 wt %.
11 . The polymer polyol of claim 4 , wherein the viscosity at 25° C. is in a range of 3,000 to 50,000 cps.
12 . A method for preparing a polymer polyol, comprising:
(a) mixing the polymer polyol stabilizer according to claim 1 , an ethylenically unsaturated monomer, an initiator and a base polyol to prepare a first mixture;
(b) mixing a base polyol and a diluent to prepare a second mixture; and
(c) feeding the first mixture to the second mixture to polymerize.
13 . The method of claim 12 , wherein the polymer polyol stabilizer is contained in an amount of 1 to 10 parts by weight based on 100 parts by weight of the ethylenically unsaturated monomer in the first mixture.
14 . The method of claim 12 , wherein the weight ratio of the base polyol used in steps (a) and (b) is 1 to 5:1.
15 . The method of claim 12 , wherein step (c) is performed at a temperature of 80 to 150° C.