Title:
POLYISOCYANATE FOR RIGID SPRAY FOAM
Document Type and Number:
Japanese Patent JP3641928
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain the subject polyisocyanate used for the in-situ foaming of a rigid spray foam using water as a foaming agent and having excellent executability, etc., by reacting a specific polyisocyanate with a specified modifying agent in a specific proportion.
SOLUTION: This polyisocyanate is obtained by reacting (A) a polyisocyanate containing (i) a diphenylmethane diisocyanate (e.g. 4,4'-diphenylmethane diisocyanate and (ii) a polyphenylene polymethylene polyisocyanate in (20-70):(80-30) weight ratio of the components (i):(ii) with (B) a modifying agent comprising a polyether monool or a polyether polyol having 300-2,000 number- average molecular weight and ≥70 wt.% content of ethylene oxide in (80-99.99):(20-0.01) weight ratio of the components A:B.
Inventors:
Takaki Shirono
Akira Naruse
Takao Fukami
Kazuki Sasaki
Akira Naruse
Takao Fukami
Kazuki Sasaki
Application Number:
JP4625698A
Publication Date:
April 27, 2005
Filing Date:
February 12, 1998
Export Citation:
Assignee:
Nippon Polyurethane Industry Co., Ltd.
International Classes:
C08J9/02; C08G18/48; C08G18/76; C08L75/04; C08G101/00; (IPC1-7): C08G18/76; C08G18/48
Domestic Patent References:
| JP53036598A |
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