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    • 5. 发明申请
    • AQUEOUS COATING COMPOSITION
    • 水性涂​​料组合物
    • WO2017158016A1
    • 2017-09-21
    • PCT/EP2017/056112
    • 2017-03-15
    • DSM IP ASSETS B.V.
    • VAN DER SLOT, Saskia CarolienOVERBEEK, Gerardus CornelisTENNEBROEK, RonaldDONDERS, Alexander Wilhelmus Martinus Cornelis
    • C08F20/58C08G18/48C08G18/66C08G18/76C08G18/08C08G18/12C09D175/12C08G18/32C08G18/34C08G18/40C08G18/42C08G18/10
    • The present invention relates to an aqueous coating composition comprising dispersed polyurethane-vinyl polymer hybrid particles wherein i. the polyurethane-vinyl polymer hybrid is obtained by free-radical polymerization of at least one vinyl monomer in the presence of a polyurethane, ii. the polyurethane is obtained by the reaction of at least (I) an isocyanate- terminated polyurethane prepolymer and (II) at least one active-hydrogen containing chain extending compound, wherein the isocyanate-terminated polyurethane prepolymer is obtained by the reaction of at least one polyol with at least one polyisocyanate, wherein from 50 to 100 wt.% of the total amount of the polyisocyanates used to form the polyurethane are aromatic polyisocyanates, iii. the polyurethane-vinyl polymer hybrid is ketone functional and contains from 50 to 1000 mmol of ketone groups per 1000 g polyurethane-vinyl polymer hybrid, preferably from 75 to 500 mmol of ketone groups per 1000 g polyurethane-vinyl polymer hybrid, more preferably from 150 to 400 mmol of ketone groups per 1000 g polyurethane-vinyl polymer hybrid, iv. the ketone groups of the polyurethane-vinyl polymer hybrid are present in the polyurethane and in the vinyl polymer, v. the weight ratio of the polyurethane to the vinyl polymer in the polyurethane- vinyl polymer hybrid ranges from 90:10 to 35:65, vi. the polyurethane-vinyl polymer hybrid has an acid value from 7 to 60 mg KOH/g polyurethane-vinyl polymer hybrid, preferably from 9 to 40 mg KOH/g polyurethane-vinyl polymer hybrid and most preferably from 12 to 25 mg KOH/g polyurethane-vinyl polymer hybrid, vii. the aqueous coating composition comprises a dihydrazide functional compound (containing two hydrazide groups (O=C-NHNH2)) with a molar mass below 1000 g/mole, viii. the molar ratio of hydrazide groups (present in the dihydrazide functional compound (vii)) to ketone groups is from 1.5 to 0.1 (preferably from 1.2 to 0.2, more preferably from 0.9 to 0.25).
    • 本发明涉及包含分散的聚氨酯 - 乙烯基聚合物杂化颗粒的含水涂料组合物,其中i。 聚氨酯 - 乙烯基聚合物杂化体是通过至少一种乙烯基单体在聚氨酯存在下的自由基聚合获得的,ii。 通过至少(I)异氰酸酯封端的聚氨酯预聚物和(II)至少一种含活泼氢的扩链化合物的反应获得聚氨酯,其中异氰酸酯封端的聚氨酯预聚物通过至少一种 多元醇与至少一种多异氰酸酯的共聚物,其中用于形成聚氨酯的多异氰酸酯总量的50-100重量%是芳族多异氰酸酯,iii。 聚氨酯 - 乙烯基聚合物杂化物是酮官能的并且每1000g聚氨酯 - 乙烯基聚合物杂化物含有50-1000mmol酮基,优选75-500mmol酮基/ 1000g聚氨酯 - 乙烯基聚合物杂化物,更优选150 至每1000g聚氨酯 - 乙烯基聚合物杂化物400mmol酮基,iv。 聚氨酯 - 乙烯基聚合物杂化物的酮基团存在于聚氨酯和乙烯基聚合物中,v。聚氨酯 - 乙烯基聚合物杂化物中聚氨酯与乙烯基聚合物的重量比为90:10至35:65, 六。 聚氨酯 - 乙烯基聚合物杂化物的酸值为7至60mg KOH / g聚氨酯 - 乙烯基聚合物杂化物,优选9至40mg KOH / g聚氨酯 - 乙烯基聚合物杂化物,并且最优选12至25mg KOH / g聚氨酯 - 乙烯基聚合物杂合体,vii。 该含水涂料组合物包含摩尔质量低于1000g / mol的二酰肼官能化合物(含有两个酰肼基团(O = C-NHNH 2)),viii。 酰肼基(存在于二酰肼官能化合物(vii)中)与酮基的摩尔比为1.5至0.1(优选1.2至0.2,更优选0.9至0.25)。