专利名称:AQUEOUS COATING COMPOSITIONS
CONTAINING POLYURETHANE-ACRYLICHYBRID POLYMER DISPERSIONS
发明人:Williams, Neal申请号:EP02792894.4申请日:20021204公开号:EP1458827B1公开日:20070110
摘要:An aqueous coating composition containing polymeric binder comprisingparticles of polyurethane-acrylic hybrid polymer dispersed in aqueous mediumcontaining i) polyurethane polymer, preferably from 0.1 to 75 wt% ii) copolymer ofethylenically unsaturated addition copolymerisable monomers, preferably from 25 to99.9 wt% characterised in that the polyurethane polymer comprises the reaction productof a) a polyisocyanate b) a compound containing at least two moieties reactive with theisocyanate moieties of the polyisocyanate c) a compound containing at least onedispersing moiety and at least one moiety reactive with the isocyanate moieties of thepolyisocyanate d) a chain extender compound e) a urethane diol, being the reactionproduct of a cyclic carbonate and a compound containing an amino group and a furthergroup selected from amino and hydroxy, said urethane diol comprising up to 80 wt% ofthe polyurethane polymer. The coatings have improved abrasion, water and stainresistance. Also an aqueous dispersion and a urethane prepolymer for use in making thedispersion.
申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
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