Surface chemistry modified latex and resdispersible powders, production and use thereof

• Main Authors: W. BETT, J-F. D' ALLEST, J-C. CASTAING
• Format: Patent
• Language: Chinese; English
• Published: 23.06.2004
• Edition: 7
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

本发明涉及具有改良表面化学性质的胶乳，它可以通过在以下物质的存在下进行自由基乳液聚合来获得：至少一种烯属不饱和单体或至少一种含残留烯属不饱和键的聚合物，至少一种自由基聚合引发剂，至少一种水溶性和/或水可分散的单嵌段、二嵌段或三嵌段聚合物，在其端部包括选自二硫酯，硫醚-硫酮，二硫代氨基甲酸酯和黄原酸酯中的能够形成自由基的活性基团。本发明类似地涉及可以通过干燥所述胶乳获得的可再分散的粉末。 Surface chemistry modified latex, obtained by radical emulsion polymerisation of ethylenic monomer(s) or polymer(s) with residual unsaturation in presence of water soluble or dispersible mono-, di- or tri-block copolymer(s) with a reactive end group capable of forming a radical and selected from dithioester, thioether-thione, dithiocarbamate and xanthate groups. Independent claims are also included for: (a) redispersible powder obtained by drying the latex; (b) formulations containing latex or powder as above for use in building materials, painting, pressure sensitive adhesives and paper manufacture.