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US 6,403,665 B1Granted
Rigid polyurethane foams
AssigneeImperial Chemical Industries PLC
InventorsThomas Heinrich Sieker, Franco Gabrieli, Saskia Rachel Walraedt
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Abstract
Polyol blend comprising a polyester polyol, a tertiary amine catalyst and an organic carboxylic acid wherein said carboxylic acid contains at least one OH, SH, NH2 or NHR functional group, wherein R is an alkyl, cycloalkyl or aryl group and the use of said polyol blend in the manufacture of rigid polyurethane foams.
Claims7
An isocyanate-reactive composition comprising:
- (i) at least 10 wt %, relative to the total weight of isocyanate-reactive compounds, of a polyester polyol having
- an average functionality of from 1.8 to 8,
- a hydroxyl number of from 15 to 750 mg KOH/g, and
- a molecular weight of 400 to 10,000;
- (ii) 0.1-5 wt %, relative to the total weight of the isocyanate-reactive composition, of an amine catalyst;
- (iii) 0.1-5 wt %, relative to the total weight of the isocyanate-reactive composition, of at least one carboxylic acid represented by the formula HO—R′—(COOH)m, wherein R′ represents a linear or branched aliphatic hydrocarbon having 1 to 5 carbon atoms, and m represents the value 1, 2, or 3;
- and
- (iv) a blowing agent.
5 more elements
An isocyanate-reactive composition comprising:
- (i) a polyester polyol;
- (ii) an amine catalyst;
- and
- (iii) 0.1-5 wt %, relative to the total weight of the isocyanate-reactive composition, of at least one carboxylic acid represented by the formula Xn—R′—(COOH)m, wherein
- X represents OH, SH, NH2, or NHR,
- R′ represents an at least divalent hydrocarbon moiety,
- n and m individually represent an integer having a value of at least 1, and
- R represents an alkyl, cycloalkyl, or aryl group.
5 more elements
Dependencies are inferred from the claim text.