Method of preparing rigid polyurethane foam and composition of rigid polyurethane foam
AssigneeBayer Aktiengesellschaft
InventorsTakanori Chiba, Takuya Matsumoto, Keiji Ono, Takehiro Shimizu
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Abstract
A method of preparing a rigid polyurethane foam having improved thermal conductivity, and a composition for such rigid polyurethane foam is provided. In the preparation a rigid polyurethane foam from a composition comprising an aromatic polyisocyanate, a polyol, a blowing agent, a catalyst, a surfactant and other aids, the blowing agent is a blend of cyclopentane and water, and the polyol contains a polyether polyol prepared by addition-polymerizing an alkylene oxide to o-toluenediamine as an initiator.
Claims7
A process for the production of a rigid polyurethane foam comprising reacting
- a) an aromatic polyisocyanate;
- and
- b) a polyether polyol prepared by addition polymerizition of a mixture of o-toluenediamine and diathanolamine with an alkylene oxide;
- in the presence of
- c) a blowing agent comprising cyclopentane and water in an amount up to 1.0 parts by weight for every 100 parts by weight of polyether polyol b);
- and optionally in the presence of at least one of
- d) a catalyst;
- e) a surfacant;
- and
- f) a processing aid.
Dependencies are inferred from the claim text.