Title:
【発明の名称】ポリウレタン発泡体の製造法
Document Type and Number:
Japanese Patent JP2892626
Kind Code:
B2
Abstract:
A low-density semi-rigid polyurethane foam having excellent wear resistance, which is demolded in a short time, can be prepared by a method of producing a polyurethane foam having microcell and a density of 0.3 to 0.9/cm<3> by a reaction injection molding process, from a polyisocyanate, and a polyol mixture containing a polyol, a catalyst, a blowing agent, and optionally a cross-linking agent, an internal mold release agent, a reinforcing agent and an other aid, characterized in that a trifunctional polyether polyol having an active hydrogen equivalent of 300 to 1,000 and an ethylene oxide content of 5 to 30 % by weight is contained in an amount of at least 40 % by weight based on the polyether polyol, and the polyether polyol has an average active hydrogen equivalent of 500 to 1,200 and a viscosity of 200 to 800 mPa.s/25 DEG C.
Inventors:
NISHIKAWA SHINJI
YOKOTA HIROSHI
YOKOTA HIROSHI
Application Number:
JP23908196A
Publication Date:
May 17, 1999
Filing Date:
September 10, 1996
Export Citation:
Assignee:
SUMITOMO BAIERU URETAN KK
International Classes:
C08J9/02; C08G18/48; C08G18/65; C08G18/66; C08G18/72; C08G18/76; C08G18/79; C08K3/00; C08K5/00; C08L75/04; C08G101/00; (IPC1-7): C08G18/72; C08G18/48; C08J9/02
Domestic Patent References:
| JP8176251A | ||||
| JP7278332A | ||||
| JP812794A | ||||
| JP4126732A | ||||
| JP364312A | ||||
| JP5829837A |
Attorney, Agent or Firm:
Aoyama Ryo (1 person outside)