公开(公告)号：US20030125459A1

公开(公告)日：2003-07-03

申请号：US10316914

申请日：2002-12-12

Applicant: BASF Akiengesellschaft

Inventor： Dirk Wulff ,  Alexander Centner ,  Gerhard Auchter

IPC: C08K003/00 ,  C08K003/20

CPC classification number: C08F265/06 ,  C08F2/22 ,  C08F285/00 ,  C08F220/10

Abstract: Described is a process for preparing aqueous polymer dispersions by at least two-stage free-radical aqueous emulsion polymerization of ethylenically unsaturated monomers, comprising: 1. a first polymerization stage, 1, in which a first monomer composition M(1) is polymerized in accordance with a monomer feed technique by adding a free-radical polymerization initiator I(1), giving an aqueous dispersion of a polymer P(1), and 2. a further polymerization stage, 2, in which 2a. a monomer composition M(2) whose makeup is different than that of the monomer composition M(1) is added in undiluted form to the aqueous dispersion of the polymer P(1), and 2b. the monomer composition M(2) is polymerized, and 3. if desired, steps 2a and 2b are repeated to carry out further polymerization stages, i, the total amounts of the monomer M(2) making up from 0.1 to 20% by weight of the monomers M(1) polymerized in stage 1 and the addition of the monomer mixture M(2) not taking place before the end of the addition of the monomer mixture M(1), wherein the polymerization in polymerization stage 2 and any further polymerization stages takes place in the presence of residual amounts of the initiator I(1) added in the 1st stage or by adding further initiator I(1) and from the beginning of step 1 to the end of step 2b in the last polymerization stage the temperature in the reaction vessel is at least 70null C., and also the use of these polymer dispersions for preparing pressure sensitive adhesives.

Abstract translation: 描述了通过烯键式不饱和单体的至少两步自由基水性乳液聚合制备含水聚合物分散体的方法，其包括：1.第一聚合阶段，其中第一单体组合物M（1）在 根据单体进料技术，通过添加自由基聚合引发剂I（1），得到聚合物P（1）的水分散体，和2.另外的聚合反应阶段，其中2a。 将组成不同于单体组合物M（1）的单体组合物M（2）以未稀释的形式加入到聚合物P（1）和2b的水分散体中。 聚合单体组合物M（2），如果需要，重复步骤2a和2b进行进一步的聚合反应，即，单体M（2）的总量为0.1-20重量％ 的单体M（1）在单体混合物M（1）的加入之前没有发生单体混合物M（2）的添加，其中聚合阶段2中的聚合和任何进一步的 聚合阶段在剩余量的第一阶段添加的引发剂I（1）存在下或通过在最后一个聚合阶段再加入引发剂I（1）和从步骤1开始到步骤2b的末端进行， 反应容器中的温度至少为70℃，并且还使用这些聚合物分散体来制备压敏粘合剂。

公开(公告)号：US20040097638A1

公开(公告)日：2004-05-20

申请号：US10610570

申请日：2003-07-02

Applicant: BASF Akiengesellschaft

Inventor： Alexander Centner ,  Karl-Heinz Schumacher ,  Oliver Hartz ,  Martin Jung

IPC: C08F034/02 ,  C08F122/04

CPC classification number: C08F220/12 ,  C08F218/08 ,  C09J7/22 ,  C09J7/245 ,  C09J7/38 ,  C09J131/04 ,  C09J133/06 ,  C09J2400/228 ,  C09J2431/00 ,  Y10T428/31855

Abstract: The invention relates to a polymer synthesized from 0.5 to 30% by weight of vinyl acetate (a), from 0.1 to 10% by weight of monomer containing at least one acid or acid anhydride group (b), from 5 to 70% by weight of at least one monomer other than (a) and (b), having a solubility of more than 5 g/l water (21null C., 1 bar) and a glass transition temperature of less than 15null C. (c), from 0 to 20% by weight of a vinylaromatic monomer having a solubility of less than 5 g/l water (d), from 0 to 90% by weight of at least one C1 to C20 alkyl (meth)acrylate (e) other than (a) to (d), and from 0 to 40% by weight of at least one further monomer (f) other than (a) to (e).

Abstract translation: 本发明涉及由0.5至30重量％的乙酸乙烯酯（a）合成的聚合物，0.1至10重量％的含有至少一个酸或酸酐基团（b）的单体，5-70重量％ 的（a）和（b）以外的至少一种单体，其溶解度大于5g / l的水（21℃，1巴）和玻璃化转变温度低于15℃。（c） ，0至20重量％的溶解度小于5g / l水（d）的乙烯基芳族单体，0至90重量％的至少一种（甲基）丙烯酸C1至C20烷基酯（e）其它 （a）〜（d），以及0〜40重量％的除（a）〜（e）以外的至少一种以上的其它单体（f）。