Patent ID: 7807767

Claim:
A method for producing acryl syrup, comprising: a step of preparing a mixture comprising a monomer component and 2,4-diphenyl-4-methyl-1-pentene for bulk polymerization; a step of heating the mixture to an initial reaction temperature; and a step of initiating the bulk polymerization so as to produce the acryl syrup by adding a polymerization initiator having the half-life of not more than 30 minutes at 5-80° C. to the mixture, wherein the bulk polymerization is carried out in a batch reactor, wherein the initial reaction temperature is controlled so that the polymerization initiator has the half-life of not more than 30 minutes, wherein the temperature in the batch reactor is changed in such a way that the temperature is increased from the initial reaction temperature to a peak exothermic temperature of less than 95° C., and then decreased from the peak exothermic temperature to the initial temperature, wherein, the polymerization initiator controls the change of the temperature and terminates the bulk polymerization in the batch reactor by being decomposed and substantially depleted in the batch reactor.