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以丁二烯、苯乙烯(St)为主要单体,引入不饱和羧酸、磺酸盐等作为功能性单体,采用复合乳化体系,以乳液聚合方式合成出油气田固井专用羧基丁苯胶乳。试验结果表明:最适宜的合成条件是w(复合乳化剂)=1.5%～2.0%、m(丁二烯)∶m(St)=(45～65)∶(55～35)、w(不饱和功能单体)=2.5%～3.5%(相对于总单体而言)、w(不饱和磺酸盐功能单体)=0.20%～1.00%、w(调节剂)=0.45%、m(烃)∶m(水)=100∶(120～130)、在(75±3)℃条件下聚合且w(过硫酸盐)=0.5%～0.6%;在最佳合成条件下制取的羧基丁苯胶乳,完全满足固井施工的要求。
Using butadiene and styrene (St) as main monomers, unsaturated carboxylic acid and sulfonate were introduced as functional monomers, and the compounding emulsion system was used to synthesize the carboxylated styrene-butadiene latex . The results show that the most suitable synthesis conditions are as follows: w (compound emulsifier) = 1.5% ~ 2.0%, m (butadiene): m (St) = (45 ~ 65) :( 55 ~ 35) Saturated functional monomer = 2.5% to 3.5% w (unsaturated sulfonate functional monomer) = 0.20% to 1.00%, w (regulator) = 0.45%, m (Water) = 100: (120-130), polymerized at (75 ± 3) ° C and w (persulfate) = 0.5% to 0.6% SBR latex, fully meet the cementing construction requirements.