| 摘要 |
<p>Producing nanoparticle modified polyisocyanate having free isocyanate groups comprises reacting a nanoparticle with an average particle size of less than 200 nm, determined by dynamic light scattering, with alkoxysilyl- and isocyanate-group containing adducts (I) and subsequently mixing with polyisocyanates having free isocyanate groups. Producing nanoparticle modified polyisocyanate having free isocyanate groups comprises reacting a nanoparticle with an average particle size of less than 200 nm, determined by dynamic light scattering, with alkoxysilyl- and isocyanate-group containing adducts of formula (OCN-R1-NHCO-QR2Z-SiX aY1 3 - a) (I) and subsequently mixing with polyisocyanates having free isocyanate groups. R1 : 1-14C-linear- or 3-14C-cyclic-aliphatic group or 6-14C-araliphatic or aromatic groups; R2 : H, 1-12C-alkyl or 6-20C-aryl- or -aralkyl or aspartic acid ester-residue (where R2 is present when Q is N); Q : O, S or N; X : hydrolyzable group; Y1 : alkyl; and Z : 1-12C-alkylene group; and a : 1-3 (preferably 1 or 2). Independent claims are included for: (1) the nanoparticle modified polyisocyanate, having free isocyanate groups, obtained by the above process; and (2) coated or bonded substrates that are obtained by using the nanoparticle modified polyisocyanates having free isocyanate groups.</p> |
