Preparation of PCR-g-MMA Adhesive and Its Sticky Performance

The graft copolymer latex of chloroprene rubber(CR)/methyl methacrylate(MMA) was prepared by emulsion graft polymerization and then powdered with coagulation method.The adhesive was obtained by dissolving PCR-g-MMA in toluene.The effects of reaction conditions on the conversion of MMA,PCR-g-MMA solution in toluene and adhesion of PCR-g-MMA adhesive were investigated.The results showed that under the optimum conditions,the conversion of MMA reached nearly 100%.SEM analysis showed that there were many macroscopical and microcosmic interspaces both outer and inner of the particles,which made it easier to be washed and dried.Under the same conditions for complete dissolve,30~60min needed for PCR-g-MMA was just as 1/10 as that for sheet CR248.The adhesion of PCRg-MMA adhesive was influenced by the reaction conditions of CR/MMA emulsion graft polymerization.When sticked PCR-g-MMA adhesive to PVC artificial leathers,the original adhesion force and the peeling strength of the adhesive were 20.4N/2.5cm and 55 N/2.5cm respectively,which were as good as that made by the sheet CR248/MMA in graft polymerization solution.