Pentane compatible polyester polyols

  • US 6,359,022 B1
  • Filed: 04/09/1999
  • Issued: 03/19/2002
  • Est. Priority Date: 10/10/1997
  • Status: Expired due to Term
First Claim
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1. A polyol based resin blend comprising:

  • (a) a polyol component comprising;

    (I) from about 20 to about 100 percent by weight of an aromatic polyester polyol reaction product tormed by inter-esterification of;

    (i) from about 10 to about 70 percent by weight of a phthalic acid based material;

    (ii) from about 20 to about 60 percent by weight of a hydroxylated material having a functionality of at least 2; and

    (iii) from about 1 to about 40 percent by weight of a hydrophobic material having;

    (1) from one to six radicals, the radicals being selected from the group consisting of carboxylic acid groups, carboxylic acid ester groups, hydroxyl groups, and mixtures thereof;

    (2) hydrocarbon groups totaling at least 4 carbon atoms for each radical present; and

    (3) an average molecular weight of from about 100 to about 1000;

    wherein the hydrophobic material is substantially free of diner acid; and

    (II) from 0 to about 80 percent by weight of a polyether polyol; and

    (b) from about 10 to about 35 parts per hundred parts of polyol of a C4-C7 hydrocarbon blowing agent.

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