Synthesis, Modification And Application Of Novel Acrylate Emulsion

Anionic acrylate copolymer latex were synthesized by seeding emulsionpolymerization with A-51and AEO-9as the emulsifiers. Effect of the ratio andamount of emulsifier, monomer and the synthesized process on emulsion werediscussed.The optimal synthesis conditions were the mass ratio between BA andST of1~3, the crosslinking monomer mass fraction of5~10%, the mass ratiobetween AA and HPA of1~3, A-51and AEO-9mass fraction of2~5%, the massratio between A-51and AEO-9of1~3. The emulsion and the latex film had thebest integrated performance. The polymerization temperature was controlled at80~85℃and the best stirring rate of the reaction was300r/min.The stable cationic polyacrylate stiffening agent was prepared using acrylicester and cationic methacrylic acid ethyl amide dimethyl(DM) as raw materialand α,α-azodiisobutyramidine dihydrochloride(V50) as initiator. Theperformance of cationic polyacrylate stiffening agents were characterized byinfrared spectro scopy(FT-IR), TEM and Zeta potential. The results showed thatall of the acrylic monomers were involved in the polymerization reaction andconsisted with the target product. The Zeta potential of the latex particle was+70.43mV and the emulsion was stable. The latex particle size showed a normaldistribution and dispersed very well, and the average particle size was85.84nm.The latex particle was cylindrical ball like core-shell, and non-agglomeration.Effect of the ratio and amount of emulsifier, the ratio of hard and soft monomeron emulsion were discussed. The optimal synthesis conditions were the massratio between ST and BA of1~3，1631and AEO-9mass fraction of1~4%, themass ratio between1631and AEO-9of1~3. The emulsion had the bestintegrated performance. The process for finishing was explored as follows:preparation of the finishing solution (10.8g emulsion was added in the100gdistilled water)â†'padding finishing agent (two dip two rolling, rolling fluid rate of about80%)â†'drying (100℃,5min)â†'baking (160℃,3min).On the basis of synthesizing acrylate copolymer latex, silicone was used tosynthesize the silicone-modified acrylate copolymer latex. The modified latexwas transparent or translucent and bright bluish. Emulsion resistant to thecalcium ion was relatively stable. The sticky and softy performance of the filmwas proved significantly because of the organic silicone. The silicone-modifiedacrylate copolymer latex had a broad foreground to apply in many fields such asfinishing coatings of leather and fabric, inner decoration and protecting coatingin industry. The performance of silicone-acrylic emulsion were characterized byinfrared spectro scopy(FT-IR), TEM and Zeta potential. The results showed thatall of the acrylic monomers and silicone was involved in the polymerizationreaction and consisted with the target product. The Zeta potential of the latexparticle was-32.99mV and the emulsion was stable. The latex particle sizeshowed a normal distribution and dispersed well, and the average particle sizewas96.5nm. The latex particle was cylindrical ball and non-agglomeration.Effect of the ratio and amount of emulsifier, the ratio of hard and soft monomer,the content of the silicone and the coupling agent on emulsion were discussed.The results showed that silicone-acrylic emulsion can be synthesized by usingvery little emulsifier. The silicone-modified acrylate copolymer latex had a broadapplication and promotion value for its low gelfraction and water absorption.Meanwhile, the impact of the pre-emulsification process conditions on thepreparation of silicone-modified acrylate latex was explored. The experimentalresults showed that pre-emulsion process conditions on the preparation of theemulsion was essential, and the process can reduce the rate of emulsion gelfraction effectively.