Title:
FLEXIBLE POLYURETHANE FOAM AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP3781530
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a light (≤50 kg/m3 apparent density) and flexible urethane form having excellent damping properties.
SOLUTION: This flexible urethane foam is the one obtained by carrying out the reaction of an activated hydrogen compound with an organic polyisocyanate composition in the presence of a foaming agent, a crosslinking agent, a foam stabilizer, a catalyst and other additives. The activated hydrogen compound is a mixture of (A) a polyether triol having 700-5000 hydroxyl equivalent, and (B) a polyether diol having 1000-6000 hydroxyl equivalent regulated so that the mixing ratio of the components A/B may be (80/20)-(10/90), and the organic polyisocyanate composition is the mixture of (C) a polymethylene polyphenyl isocyanate and (D) 2,4- and/or 2,6-tolylene diisocyanate regulated so that the mixing ratio of the components C/D may be (65/35)-(80/20). The foam also has ≤-15 dB transmission rate of vibration at 500-1000 Hz frequency.
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Inventors:
Hiroki Tsutsui
Masashi Obata
Kazuhiko Okubo
Kunio Sasaoka
Seijiro Sakai
Masashi Obata
Kazuhiko Okubo
Kunio Sasaoka
Seijiro Sakai
Application Number:
JP28479797A
Publication Date:
May 31, 2006
Filing Date:
October 17, 1997
Export Citation:
Assignee:
Mitsui Chemicals, Inc.
International Classes:
C08G18/48; C08J9/02; C08G18/00; C08G18/76; C08G101/00; C08L75/04; (IPC1-7): C08G18/48; C08G18/00; C08G18/76; C08J9/02; //(C08G18/48; C08G101:00); C08L75:04
Domestic Patent References:
| JP8157554A | ||||
| JP3200829A | ||||
| JP62172011A | ||||
| JP11116655A |