氯丁胶用低毒性溶剂体系的设计

以甲缩醛(MET)、碳酸二甲酯(DMC)、甲基环戊烷(MCP)、丙酮(DMK)、乙酸乙酯(EAC)、环己烷(CHA)和溶剂油等作为氯丁胶及其预反应液的低毒性溶剂,以m(溶剂)∶m(2402酚醛树脂)∶m(活性氧化镁)∶m(三乙醇胺)=10∶10∶1∶0.1制取预反应液,探讨了不同的低毒性溶剂体系对氯丁胶性能的影响。结果表明:以m(MCP)∶m(MET)=4∶1作为预反应液的低毒性溶剂体系,效果较好;当混合溶剂中V(EAC)∶V(MCP)∶V(溶剂油)∶V(DMC)∶V(MET)=20∶10∶40∶10∶20、w(混合溶剂)=70%～80%时,相应氯丁胶黏度适中、施工性好、黏性保持时间长、粘接强度高且符合环保要求。

Design of low-toxicity solvent systems for neoprene adhesive

With methylal(MET),dimethyl carbonate(DMC),methyl cyclopentane(MCP),acetone(DMK),ethyl acetate(EAC),cyclohexane(CHA) and solvent oil as low-toxicity solvent of neoprene adhesive and its pre-reaction solution,a pre-reaction solution was prepared when the mass ratio of m(solvent)∶m(phenol-formaldehyde resin)∶m(activated magnesium oxide)∶m(triethanolamine) was 10∶10∶1∶0.1,and the influences of different low-toxicity solvent systems on properties of neoprene adhesive were discussed.The results showed that the MCP/MET low-toxicity solvent system for the pre-reaction solution had good impact when the mass ratio of m(MCP)∶m(MET) was 4∶1.The relevant neoprene adhesives had moderate viscosity,better workability,longer viscosity maintaining time and higher bonding strength,and could meet the requirements of environmental protection when the volume ratio of V(EAC)∶V(MCP)∶V(solvent oil)∶V(DMC)∶V(MET) was 20∶10∶40∶10∶20 in mixed solvent and the mass fraction of mixed solvent was 70%-80%.