Decomposition type reactive emulsifier and polymer-modifying method using the same
申请人:DAI-ICHI KOGYO SEIYAKU CO., LTD.
公开号:EP0990465A2
公开(公告)日:2000-04-05
Use of the novel decomposition type reactive emulsifier of the following general formula (I) in emulsion polymerization insures a high degree of stability of polymerization reaction, marked improvements in the water resistance, adhesion, heat resistance and weather resistance of the film available from the resulting emulsion, the ease with which the emulsion can be destroyed for recovery of the polymer, and significant improvements in polymer properties.
wherein R1 and R2 may be the same or different and each represents an alkyl or alkenyl group of 1∼20 carbon atoms or a hydrogen atom (provide, however, that both of R1 and R2 do not concurrently represent hydrogen); R3 represents a hydrogen atom or a methyl group; X represents a hydrogen atom or an ionic hydrophilic group which may be anionic, cationic or amphoteric; A represents an alkylene or substituted alkylene group of 2∼4 carbon atoms; n represents an integer of 0∼100, inclusive, and when n is equal to not less than 2, (AO)n may be a homopolymer comprising one kind of repeating unit as represented by the following formula (i) or a block or random polymer comprising two or more kinds of repeating units having dissimilar substituent groups (A1, A2 ...) as represented by the following formula (ii)]
-(AO)-(AO)-(AO)- (i)
-(A1O)n1-(A2O)n2-... ... (ii)
(where n1 + n2 + ... ... = n)
在乳液聚合中使用以下通式(I)的新型分解型活性乳化剂,可确保聚合反应的高度 稳定性,明显改善由此产生的乳液薄膜的耐水性、粘附性、耐热性和耐候性,易于破 坏乳液以回收聚合物,并显著改善聚合物的性能。
其中 R1 和 R2 可以相同或不同,各自代表 1∼20 个碳原子的烷基或烯基或氢原子(但 R1 和 R2 不能同时代表氢);R3 代表氢原子或甲基;X 代表氢原子或离子亲水基团,可以是阴离子、阳离子或两性基团;A 代表碳原子数为 2∼4 的亚烷基或取代亚烷基; n 代表 0∼100 的整数,当 n 等于或不小于 2 时,(AO)n 可以是由下式(i)所代表的一种重复单元组成的均聚物,或由下式(ii)所代表的两种或两种以上具有不同取代基(A1、A2......)的重复单元组成的嵌段或无规聚合物。......)组成的嵌段聚合物或无规聚合物。
-(AO)-(AO)-(AO)-(AO)-(i)
-(A1O)n1-(A2O)n2-...... (ii)
(其中 n1 + n2 + ...... = n)