Patents
A novel process for casting of Poly methyl methacrylate based components, comprising of following steps: characterized in that preparing a prepolymer syrup by mixing purified methyl methacrylate monomer or a mixture of purified methyl methacrylate monomer and Polymethyl methacrylate(PMMA) in presence of purified polymerizing catalyst at a temperature in the range of 40 to 80 ?C for a period of 5-15 minutes, followed by heating the syrup to 92 to 98 ?C for the period of 5 to 15 minutes to obtain a syrup, cooling the said syrup at a temperature in a range of 0 to 30 ?C to obtain prepolymer, degassing the prepolymer obtained above, pouring the prepolymer slowly or step by step to a mould of desired shape kept at a temperature ranging from 35 to 60 ?C to give component shape, for a period depending on the final thickness of the component in the range of 10-25 mm / day followed by annealing the component in the mould at a temperature ranging form 98 ?C to 105 ?C, for a period of 6 to 48 hours and then removing the component from the mould.