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ADITYA BIRLA CHEMICALS (THAILAND) LTD.

ADITYA BIRLA CHEMICALS (THAILAND) LTD. Patent applications
Patent application numberTitlePublished
20110042843 EPOXY FOAM RESIN - A process for making epoxy resin foam blocks of varying density comprising mixing together (i) a foam resin comprising: a first epoxy resin, a foaming agent to the extent of 2% to 10% of the mass of the epoxy resin, a surfactant to the extent of 2% to 6% of the mass of the epoxy resin, a filler, a toughening agent and (ii) a curing agent comprising: a hardener and a second epoxy resin, the ratio of the foam resin to curing agent being in the range of about 100:20 to 100:25 by mass to form a reaction mixture; pouring the reaction mixture inside a mold maintained at a temperature in the range of 70° to 80° C. and allowing the mixture to cure in the mold for 60 to 100 min.; allowing the mold to cool at a temperature in the range of 15° C. to 30° C. and demolding to obtain a green block; and post-curing the green block in an air circulatory oven for 10 to 15 hrs to obtain a final hard foam block.02-24-2011
20100280191EPOXY RESIN COMPOSITION - A process for making a molded composite comprising the following steps: reacting a reaction mass containing a polyepoxide, in the proportion of about 20% to 50% with respect to the reaction mass, a diol, in the proportion of about 10% to 20% with respect to the reaction mass, a hardener, in the proportion of about 20% to 50% with respect to the reaction mass, in the presence of an accelerator in the proportion of about 0.5 to 10.0% with respect to the reaction mass either alone or in solution with compatible diluents, to obtain an epoxy resin mix having intrinsic viscosity in the range of 100 to 850 cPs, pouring the resin mix in a mold having an in-situ glass fiber scaffold at a mold temperature in the range of 45 to 50 C and applying pressure to the resin mix in the mold to form a compressed green composition: partially curing the compressed green composition at a temperature in the range of 60 to 80 C to obtain a partially cured composite; and further curing the partially cured composite at a temperature in the range of 80 to 90 C to obtain a fully cured composite. The composite is used for structural applications like windmill blades, yachts, domes, ships made from a composite made in accordance with the process as mentioned herein.11-04-2010