Polymer/polyol and preformed stabilizer systems
AssigneeArco Chemical Technology, L.P.
InventorDonald W. Simroth
Life of this patent
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Abstract
Improved polymer/polyol compositions and processes for making them; high potency preformed stabilizers used to make the polymer/polyol compositions and processes for making them; and improved polyurethane products made from the polymer/polyols compositions; characterized by a material reduction in polymer/polyol viscosity while raising the polymer solids content.
Claims42
A polymer/polyol composition which possesses a polymer content of about 30 to about 60 weight percent, based on total weight, a viscosity in centistokes less than about 20,000 cSt over the range of said polymer content, product stability such that essentially 100% passes through a 150 mesh screen, comprising
- (I) a liquid base polyol having a hydroxyl number of about 10 to about 180 present in the composition in an amount of from about 40 to about 70 weight percent of the composition,
- (II) a particulate polymer portion dispersed in the liquid base polyol (I) having an average particle size less than about 10 microns and being stable to settling, comprising free radically polymerized ethylenically unsaturated monomer, in the presence of
- (III) a high potency preformed stabilizer which is a free radical polymerization product of
- (A) a free radically polymerizable ethylenically unsaturated monomer and
- (B) an adduct of a polyhydric alcohol having the average formula
- A(OROX).sub.>3
- wherein A is a polyvalent organic moiety from a polyol, the free valence of which is >3, or has an average value equal to >3, R is the divalent residue comprising an alkylene oxide moiety and X is one or more of an organic moiety containing reactive unsaturation copolymerizable with (A), that is, X is from a reactive unsaturated compound capable of forming the adduct with the polyol which leaves A, and hydrogen, about one of such X is the organic moiety containing reactive unsaturation and the remaining X's are hydrogen,
- (C) optionally adducted with an organic polyisocyanate,
- (D) a liquid diluent in which (A), (B) and (C) are soluble, but in which the free radical polymerization product (III) is essentially insoluble, wherein when at least a portion of said liquid diluent is a mono-ol, substantially all of said mono-ol is stripped from the polymer polyol composition prior to a use thereof,
- wherein the amount of (B) or reaction product of (B), unreacted with (A), that is contained in the liquid polyol (I) is less than about 2 weight percent of the weight of the liquid polyol (I).
A high potency performed stabilizer for use in making polymer/polyols comprising the free radical polymerization product of
- (A) a free radically polymerizable ethylenically unsaturated monomer,
- (B) an adduct of a polyhydric alcohol having the average formula
- A(OROX).sub.>3
- wherein A is a polyvalent organic moiety from a polyol, the free valence of which is >3, or has an average value equal to >3, R is the divalent residue comprising an alkylene oxide moiety and X is one or more of an organic moiety containing reactive unsaturation copolymerizable with (A), that is, X is from a reactive unsaturated compound capable of forming the adduct with the polyol which leaves A, and hydrogen, about one of such X is the organic moiety containing reactive unsaturation and the remaining X's are hydrogen,
- (C) in which the adduct may be further adducted with an organic polyisocyanate, and
- (D) a liquid diluent in which (A), (B) and (C) are soluble, but in which the free radical polymerization product is essentially insoluble.
Dependencies are inferred from the claim text.