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AssigneeMitsui Chemicals, Inc.
InventorsMasahiro Isobe, Kazuhiko Ohkubo, Seijiro Sakai
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The high-durability flexible polyurethane cold cure molded foam of the invention has an overall density of not less than 35 kg/m3 and not more than 45 kg/m3 and a wet heat compression set of not more than 15%, and preferably has a hardness change ratio, as determined in a repeated compression test, of not more than 15%. This foam can be obtained by the process of the invention. The process of the invention is a process for producing a flexible polyurethane cold cure molded foam obtained from a polyol and/or a polymer polyol containing dispersed polymer microparticles obtained by radical polymerizing a compound having an unsaturated bond in the polyol, water, a catalyst and a polyisocyanate, wherein the polyol is a polyol synthesized by the use of a catalyst containing at least one compound selected from the group consisting of a compound having a nitrogen-phosphorus double bond, cesium hydroxide and rubidium hydroxide. The foam of the invention has a low density and is excellent in durability, particularly in hardness change ratio in a repeated compression test and wet heat compression set. According to the process of the invention, such a foam can be obtained.
A process for producing a flexible polyurethane cold cure molded foam having an overall density of not less than 35 kg/m3 and not more than 45 kg/m3 and a wet heat compression set of not more than 15%, wherein the flexible polyurethane cold cure molded foam is obtained from a polyol synthesized by a use of a catalyst containing at least one compound selected from the group consisting of a compound having a nitrogen-phosphorus double bond, cesium hydroxide and rubidium hydroxide, and the polyol being a polyoxyalkylene polyol;
A flexible polyurethane cold cure molded foam, having an overall density of not less than 35 kg/m3 and not more than 37.6 kg/m3 and a wet heat compression set of not more than 15%, wherein the flexible polyurethane cold cure molded foam is obtained by a reaction of a polyisocyanate with a polyol (a) containing a polyoxyalkylene polyol.
The flexible polyurethane cold cure molded foam having an overall density of not less than 35 kg/m3 and not more than 37.6 kg/m3 and a wet heat compression set of not more than 15%, wherein the flexible polyurethane cold cure molded foam is obtained by a reaction of a polyisocyanate with a polyol (a) containing a polyoxyalkylene polyol,
Dependencies are inferred from the claim text.