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Synthesis of High-solids Acrylic Resin with "Starved State" Technique


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Synthesis of High-solids Acrylic Resin with "Starved State" Technique
SUN Zhi-juanZHANG Xin-yaHUANG HongCHEN Huan-qin
Institute of Chemical Engineering,South China University of Technology,Guangzhou 510641,China
acrylic resin high-solids / starved state0 polymerization technique property
The acrylic resin with high solids is synthesized by the polymerization technique of / starved state0 feed. The factors that influence the properties of the resin are discussed, includimg monomers system, them ixture ratio of solvents, initiators and reactive temperature. The experimen- tal results show that using the feed technique of/ starved state0 can raise the conversion ratio ofmon- omers, shorten the reactive time and get polymersw ith much more even distribution of molecular weigh;t the technique of adding azobisisobutyronitrile (AIBN) as an initiator first and then benzo- peroxide( BPO) as another initiator at later stage of experiment can get higher initiating efficiency than using one initiator only. Furthermore, butyl acetate, dimethyl benzene and butanol are used as m ixture solvents because of low poison. W hen the m ixture ratio is 2B1B1, the system can keep good stability, the solid content ismore than 70% and the viscosity of polymers is appropriate. The pre- pared acrylic resin has outstanding properties, such as excellent adhesion, waterproo,f alkali and outdoorweather resistance. The acrylic resin can keep original shape after it is soaked for 96 hours in alkali solventw ith pH between 12 and 13, and the chrom atism value of quick ultraviolet less than 5% after seventy-hour ultraviolet irradiation.


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Last Update: 2007-02-28