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    • 92. 发明公开
    • Radiation curable aqueous compositions with controlled polymer flow
    • 聚合物聚合物(StrahlungshärtbarewässrigeZusammensetzungen mit kontrolliertem Polymerfluss
    • EP2947108A1
    • 2015-11-25
    • EP14169199.8
    • 2014-05-21
    • Allnex Belgium, S.A.
    • Tielemans, MichelSalviato, Jean-YvesBaurant, Jean-Noel
    • C08G18/67C08G18/73C08G18/81C08G18/08C08G18/22C08L75/16
    • C09D175/16C08G18/0823C08G18/227C08G18/673C08G18/73C08G18/8175
    • Provided in the invention is an aqueous radiation curable composition (I) comprising :
      - at least one ethylenically unsaturated polyurethane (A) obtained from the reaction of at least one polyisocyanate compound (Ai); at least one ethylenically unsaturated compound (Aii) containing at least one reactive group capable to react with isocyanate groups; at least one hydrophilic compound (Aiii) containing at least one reactive group capable to react with isocyanate groups and at least one other group which is capable to render the polyurethane polymer dispersible in aqueous medium as such or after the formation of a salt; optionally, at least one polyol (Aiv); optionally, at least one further compound (Av) different from the polyol (Aiv) and comprising at least one reactive group capable to react with isocyanate groups; and optionally, at least one reactive electrophilic compound (Avi); said ethylenically unsaturated polyurethane (A) preferably being characterized by a molecular weight that is above 1,000 Daltons;
      - at least one ethylenically unsaturated polyurethane (B), different from the polyurethane (A), obtained from the reaction of at least one polyisocyanate compound (Bi); at least one ethylenically unsaturated compound (Bii) containing at least one reactive group capable to react with isocyanate groups; optionally, at least one polyol (Biv); optionally, at least one further compound (Bv) different from the polyol (Biv) and comprising at least one reactive group capable to react with isocyanate groups; and optionally, at least one reactive electrophilic compound (Bvi); said ethylenically unsaturated polyurethane (B) preferably being characterized by a molecular weight that is below 10,000 Daltons; and
      - optionally, at least one ethylenically unsaturated compound (C) different from (A) and (B);

      wherein the radiation curable composition (I) in dry form has a steady-state creep viscosity η 30 , expressed as the apparent viscosity after a deformation time of 30 minutes with a load σ0 = 50 Pa at 23°C, that is above 1.10 3 Pa.s, more preferably above 1.10 4 Pa.s.
      Compositions (I) of the invention are characterized by an improved creep viscosity η 30 and provide polymer materials with a good flow and mirror effect. In general these materials are less sensitive to dust pick-up and fingerprints.
      Further provided in the invention is a one-vessel solvent free process for preparing such materials.
    • 本发明提供一种水性可辐射固化组合物(I),其包含:至少一种由至少一种多异氰酸酯化合物(A 1)的反应得到的烯属不饱和聚氨酯(A); 至少一种含有至少一个能够与异氰酸酯基团反应的反应性基团的烯属不饱和化合物(Aii); 至少一种亲水性化合物(Aiii)含有至少一个能够与异氰酸酯基团反应的反应性基团和至少一种能够使聚氨酯聚合物本身在水性介质中分散或形成盐的其它基团; 任选地,至少一种多元醇(Aiv); 任选地,至少一种不同于多元醇(Aiv)的另外的化合物(Av),并且包含至少一个能够与异氰酸酯基反应的反应性基团; 和任选的至少一种反应性亲电子化合物(Avi); 所述烯键式不饱和聚氨酯(A)优选的特征在于分子量高于1,000道尔顿; - 至少一种由至少一种多异氰酸酯化合物(Bi)的反应得到的不同于聚氨酯(A)的烯属不饱和聚氨酯(B); 至少一种含有至少一个能够与异氰酸酯基反应的反应性基团的烯属不饱和化合物(Bii); 任选地,至少一种多元醇(Biv); 任选地至少一种不同于多元醇(Biv)的另外的化合物(Bv),并且包含至少一个能够与异氰酸酯基反应的反应性基团; 和任选的至少一种反应性亲电子化合物(Bvi); 所述烯键式不饱和聚氨酯(B)优选的特征在于分子量低于10,000道尔顿; 和 - 任选地至少一种不同于(A)和(B)的烯属不饱和化合物(C); 其中干燥形式的可辐射固化组合物(I)具有稳态蠕变粘度·30,表示为在23℃的负载Ã= 50Pa(30℃)的变形时间之后的表观粘度,高于1.10 3 Pa.s,更优选1.10 4 Pa.s 本发明的组合物(I)的特征在于改进的蠕变粘度·30,并提供具有良好流动性和镜面效果的聚合物材料。 一般来说,这些材料对吸尘和指纹不那么敏感。 本发明还提供了一种用于制备这种材料的单容器无溶剂方法。