| 摘要 |
PROBLEM TO BE SOLVED: To provide a polyol composition for a spray-foamed rigid polyurethane foam, wherein water is used as a foaming agent and a heat-insulating layer of the rigid polyurethane foam does not shrink after application even when the spraying thickness obtained by one-time spraying is 10 mm or more. SOLUTION: A polyol composition is provided in which 100 pts.wt. polyol compound contains 40-60 pts.wt. polyether polyol compound obtained with an ethylenediamine having a hydroxyl value of 300-600 mgKOH/g as the initiator and 10-30 pts.wt. polyether polyol compound obtained with glycerol having a hydroxyl value of 50-200 mgKOH/g as the initiator, and in which a foam stabilizer contains three types: (a) a cyclic dialkylpolysiloxane having 4-5 Si-O bonds, (b) a silicone polymer that is the co-hydrolysis condensation product of at least one selected from the group consisting of (R<SP>1</SP>)Si(OR<SP>2</SP>)<SB>3</SB>, (R<SP>1</SP>)<SB>2</SB>Si(OR<SP>2</SP>)<SB>2</SB>, and (R<SP>1</SP>)<SB>3</SB>Si(OR<SP>2</SP>) with Si(OR<SP>2</SP>)<SB>4</SB>, and (c) a copolymerized silicone compound. COPYRIGHT: (C)2009,JPO&INPIT |
