摘要
介绍PVC掺混树脂小试和135m^3工业生产结果。采用悬浮聚合,通过油溶性引发剂、分散剂、乳化剂、致密剂、调粒剂的选择,研究了各种助剂对掺混树脂质量的影响。结果表明,采用复合引发剂可缩短聚合时间,使聚合平稳;DGL是掺混树脂聚合的理想分散剂,用量0.40～1.0份(对单体言);非离子乳化剂与DGL配合,比离子乳化剂起到更好的保胶、分散作用;致密剂C可将树脂吸油率控制在7%以下,调粒剂可将树脂颗粒粒径由100～115μm下调到65～80μm,表观密度达0.55g/ml。在上述优化工艺条件下,产品主要技术指标达到:K值65～69;白度≥90%;VCM残留≤1/10~6。该产品与糊树脂掺混,能显著降低糊粘度,2小时糊粘度约下降1/2。
The results of small-scale-test and 135m^3 industrial production of PVC compounding resin is given in this paper. The effect of some additives on the properties of the compoundig resin during the suspension polymerization were studied by choosing the oil-soluble initiator, dispersing agent, emulsifier, compacting agent and particle size controlling agent. The results showed the use of compound initiator could make the polymerization time shortened and the polymerization was more steady. DGL was an ideal dispersing agent for the polymerization, the adding amount of it was 0. 40～1. 0 part (for monomer); a better protective effect for the compound and better dispersing could be achieved when non-ionic emulsifier and DGL were used in cooperation;the oil-absorption ratio of the compounding resin could be controlled to be smaller than 7% by the use of compactiong agent; the particle diameter of the compounding resin could be reduced from 100～115 μm to 65～80μm by the use of particle size controlling agent,and the apparent density of the compounding resin was up to 0. 55g/ml. Under the above mentioned optimized conditions, the key technical index of the compounding resin was as follows : K value 65～69, whiteness≥90%, VCM residual value≤1/10~5. When compounded with paste resin, the paste viscosity could be reduced obviously, reduced by 50% when compounded for 2 hours.
出处
《塑料工业》
CAS
CSCD
北大核心
1996年第3期84-87,共4页
China Plastics Industry
基金
"八五"攻关课题
