FIELD: chemistry.
SUBSTANCE: invention relates to polyol blends which are used in the manufacture of rigid polyurethane foams. Polyol mixture contains: polyester polyol having a hydroxyl functionality of greater than 4, polyester polyol having a hydroxyl functionality of from 2 to 4, polyester polyol produced by a polycondensation reaction between an aromatic dicarboxylic acid, a polyol and an epoxy compound having a straight-chain alkyl or alkenyl group containing at least six carbon atoms.
EFFECT: invention makes it possible to improve the compatibility of the hydrocarbon blowing agent in the polyol mixture.
12 cl, 2 tabl
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| METHOD OF PRODUCING RIGID FOAMED POLYISOCYANURATES USING POLYOLS OF NATURAL OILS | 2009 |
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RU2235734C2 |
