Plasticizer composition and resin composition comprising same
A technology of composition and plasticizer, which is applied in the field of plasticizer composition and resin composition containing the plasticizer composition, can solve the problem of plasticizing efficiency decline, no obvious physical performance, and reduced mechanical performance and stress resistance, etc., to achieve excellent compatibility and plasticizing efficiency, and to improve migration resistance and volatilization loss
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[0078] Different from the aforementioned preparation method, a preparation method comprising the step of performing a hydrogenation reaction of dialkyl terephthalate species in the presence of a metal catalyst to convert cyclohexane 1,4-diester species may be applied.
[0079] The hydrogenation reaction step is a reaction to remove the aromaticity of the benzene ring of the terephthalate by adding hydrogen gas, and may be a type of reduction reaction.
[0080] The hydrogenation reaction is used to synthesize cyclohexane 1,4-diesters by reacting terephthalates with hydrogen in the presence of a metal catalyst, and the reaction conditions may include hydrogenation of only the benzene ring without affecting All the usual reaction conditions for carbonyls substituted on benzene.
[0081] The hydrogenation reaction may be performed by further containing an organic solvent such as ethanol without limitation. As the metal catalyst, a Rh / C catalyst, a Pt catalyst, a Pd catalyst, etc....
preparation Embodiment 1
[0103] Preparation Example 1: Bis(2-ethylhexyl)cyclohexane 1,4-diester (1,4-DEHCH)
[0104] Into a four-necked 3-liter reactor equipped with a cooler, condenser, decanter, reflux pump, temperature controller and stirrer, 516.5 g of cyclohexane 1,4-dicarboxylic acid, 1,170 g of 2- Ethylhexanol and 1.55 g of tetraisopropyl titanate catalyst, the reaction temperature was set to 230° C., and the direct esterification reaction was performed for about 6 hours while nitrogen gas was continuously injected. The reaction ended when the acid value reached 0.1.
[0105] After finishing the reaction, extractive distillation was performed under reduced pressure to remove unreacted raw materials. After the extractive distillation, a neutralization process, a dehydration process, and a filtration process were performed to prepare 1,155 g (yield: 97%) of bis(2-ethylhexyl)cyclohexane 1,4-dicarboxylate.
preparation Embodiment 2
[0106] Preparation Example 2: Diisononylcyclohexane 1,4-diester (1,4-DINCH)
[0107] Diisononylcyclohexane 1,4-dicarboxylate was prepared by the same method as in Preparation Example 1 except that isononyl alcohol was used instead of 2-ethylhexanol in Preparation Example 1.
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