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US 2017/0306077 A1Published application
Rigid polyurethane foams comprising modified phenolic resins additives
OwnerPierre CHAFFANJON, Stephan SCHRÖTERinventors
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Abstract
The present technology provides a method of manufacturing a rigid polyurethane foam having a low thermal conductivity from a foam composition comprising a polyol, an isocyanate, a polyurethane catalyst, a surfactant, water, a modified phenolic resin, optionally a physical blowing agent, and optionally a fire retardant.
Claims20
A polyurethane or polyisocyanurate foam composition comprising:
- a polyol or a mixture thereof;
- an isocyanate;
- a polyurethane catalyst or a mixture thereof;
- a modified phenolic resin, the modified phenolic resin being an oxyalkylated phenolic resin in which at least 30 mol % of phenolic hydroxyl groups have been modified to provide the resin with a primary hydroxyl group, a secondary hydroxyl group, or both;
- and the composition has an isocyanate index of about 250 or less;
- optionally a surfactant;
- optionally, a physical blowing agent or a mixture thereof;
- optionally, a chemical blowing agent or a mixture thereof;
- and
- optionally, a fire retardant additive or a mixture thereof.
7 more elements
Dependencies are inferred from the claim text.