surface active monomer used in the invention
February 26, 2013 10:55
Title: METHOD FOR PRODUCING RIGID POLYURETHANE FOAMS
Number/Link: WO2013/024101 (German)
Applicant/Assignee: BASF
Publication date: 21-02-2013
“Gist”: Polymer polyols comprising surface-active and reactive SAN particles for improved rigid foams.
Why it is interesting: In this invention polymer polyols are prepared by in-situ co-polymerisation of styrene, acrylonitrile (preferred) and a polyether siloxane surfactant comprising at least one unsaturated group and at least one hydroxyl group. This will result in a polymer polyol (or “graft polyol”) comprising surface-modified particles, which, when used to prepare rigid foams, will end up predominantly (>50%) in the cell walls rather than in the cell struts. This is new and surprising. The rigid foams should show improved insulation properties and compressive strength.
surface active monomer used in the invention
Posted by Gerhard Bleys
Categories: Polyols, Rigid Foams
Tags: Insulation, surfactants
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By July Wang on March 19, 2013 at 15:08