室温自交联丙烯酸酯乳液的合成及性能研究  

Synthesis and Properties of Self-Crosslinking Acrylic Latex at Room Temperature

作　　者：马昕宇 石熠 徐军 Ma Xinyu;Shi Yi;Xu Jun(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300350,China;College of Materials Science and Engineering,Shenyang University of Chemical Technology,Shenyang 110000 China)

机构地区：[1]天津大学化工学院,天津300350 [2]沈阳化工大学材料科学与工程学院,沈阳110000

出　　处：《涂料工业》2021年第2期8-15,共8页Paint & Coatings Industry

摘　　要：采用半连续种子乳液聚合法,改性异构十三醇醚(H-606)与十二烷基硫酸钠(SDS)复配,以甲基丙烯酸(MAA)为功能单体,叔碳酸乙烯酯(Veo Va10)为改性单体,乙酰乙酸烯丙酯(AAA)与己二胺(HDA)为复配交联剂,合成了AAA-HDA/Veo Va10改性丙烯酸酯乳液。研究了AAA加料时间、AAA-HDA配比、AAA与Veo Va10用量对乳液性能的影响。结果表明:AAA参与共聚合,并在室温下与HDA发生失水自交联反应;当AAA进料时间为单体滴加20%时、AAA用量为总单体质量的2%、m(AAA)∶m(HDA)=5∶2、Veo Va10用量10%时,乳胶膜吸水率从14.76%降至8.13%,拉伸强度达到2.90 MPa,断裂伸长率为493.86%,乳胶膜耐水白能力大幅提高(ΔL由88.5降至7.1)。Allyl acetoacetate/-vinyl versatate(AAA/Veo Va10)modified acrylate latex wasprepared by means of semi-continuous seed emulsion polymerization with methacrylic acid(MAA)as the functional monomer,vinyl versatate(Veo Va10)as modifying monomer,Allyl acetoacetate(AAA)and hexamethylene diamine(HDA)as compound crosslinking agent,sodium dodecylsulfate(SDS)and modified isotridecyl alcohol polyoxyethylene ether(H-606)as mixed emulsifiers.The effects of AAA feeding time,AAA-HDA ratio and AAA,Veo Va10 dosage on the latexperformance were studied. The results showed that AAA participated in a copolymerization andundergone a dehydration self-crosslinking reaction with HDA at room temperature. When the AAAfeeding time was 20% of the monomer dropping time,AAA=2 wt%,m(AAA)∶m(HDA)=5∶2,Veo Va10=10 wt%,the water absorption of latex film decreased from 14. 76% to 8. 13%,the tensilestrength reached 2. 90 MPa,the elongation at break was 493. 86%,and the whitening resistance ofthe latex film was greatly improved(ΔL was reduced from 88. 5 to 7. 1).

关 键 词：乙酰乙酸烯丙酯 叔碳酸乙烯酯 自交联 丙烯酸酯乳液 

分 类 号：TQ630.1[化学工程—精细化工]