One-component rigid polyurethane foam system for aerosol cans - contains isocyanate prepolymer, known additives, volatile propellant and a viscous liq., satd. aliphatic hydrocarbon

Harte Polyurethanschaumstoffe bildende Einkomponentensysteme

Abstract

One-component systems (I) in pressurised containers, for prodn. of rigid polyurethane (PU) foam, comprise mixts. of (a) NCO gp.-contg. prepolymers obtd. by reaction of polyisocyanates with cpds. of mol.wt. 62-10,000 contg. at least 2 NCO-reactive H atoms, (b) known additives etc., (c) volatile liq. propellants with b.pt. below 0 deg.C/1-13 hPa, and (d) 0.25-2.5 wt.% (w.r.t. a) liq., satd. aliphatic hydrocarbons with dynamic viscosity 110-230 mPa.s at 20 deg.C and density 0.845-0.890 g/m3. Also claimed is rigid PU foam obtd. by hardening system (I) by the action of moisture after it leaves the pressure can. USE/ADVANTAGE - Used (esp. in aerosol cans) for filling applications, e.g. between window frames and walls, holes in walls etc., and fixing, e.g. door frames. Incorporation of (d) prevents the usual change in vol. or thickness due to diffusion processes, changes in temp. and/or humidity sec., and gives 1-component PU foam with improved dimensional stability.

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Cited By (8)

    Publication numberPublication dateAssigneeTitle
    DE-19704158-A1August 06, 1998Fischer Artur Werke GmbhPolyurethanzusammensetzung mit verbesserter langzeitresistenz gegen Mikroorganismenbefall
    EP-0769338-A1April 23, 1997Borden Chemical, Inc.Liants de fonderie à base d'uréthanes résistants à revêtements aqueux
    EP-0903368-A1March 24, 1999Enichem S.p.A.Process for the preparation of rigid polyurethane expanded products with an open cell structure
    US-5733952-AMarch 31, 1998Borden Chemical, Inc.Foundry binder of phenolic resole resin, polyisocyanate and epoxy resin
    US-5880167-AMarch 09, 1999Henkel Kommanditgesellschaft Auf AktienPolyurethane compositions with a low content of monomeric diisocyanates
    US-5981622-ANovember 09, 1999Borden Chemical, Inc.Foundry binder of polyurethane, phenolic resin, polyisocyanate and epoxy resin
    US-6790537-B1September 14, 2004Basf AktiengesellschaftComposite elements containing polyisocyanate-polyaddition products
    WO-0059718-A1October 12, 2000Basf AktiengesellschaftVerbundelemente enthaltend polyisocyanat-polyadditionsprodukte