Method for synthesizing polyolefin nucleating agent aldehyde alcohol compound

聚烯烃成核剂醇醛化合物的合成方法

Abstract

The invention discloses a synthesizing method of a polyolefin nucleating agent aldol compound. Sorbic alcohol and xylitol respectively react with p-tolualdehyde, p-ethyl benzaldehyde and 3, 4-syringic aldehyde; p-toluene-sulfonic acid serves as a catalyst, cyclohexane serves as a solvent and methanol serves as an accelerant to synthesize 6 nucleation agents, i.e., DMDBS, EDBS, MDBS, DMDBX, EDBX and MDBX, and the like. The optimized conditions are obtained by experiments, i.e., the feed mole ratio is 2.1: 1.0; the dosages of the p-toluene-sulfonic acid, the cyclohexane and the methanol are respectively 4.0 percent, 580 percent and 430 percent of a reaction base substance; reaction time is 6 hours. The method has the advantages of easily obtainable raw materials, simple technique, short reaction time, and the like. The prepared nucleating agent represents obvious influences on the crystallinity of PP and PE; when the adding quantity of the nucleating agent is 0.3 percent to 0.5 percent, the crystallinity is maximal.
本发明公开了一种聚烯烃成核剂醇醛化合物的合成方法。本发明以山梨醇、木糖醇分别与对甲基苯甲醛、对乙基苯甲醛、3,4-二甲基苯甲醛反应,对甲苯磺酸为催化剂,环己烷为溶剂,甲醇为促进剂,合成了DMDBS、EDBS、MDBS、DMDBX、EDBX和MDBX等6种成核剂。通过实验得到合成反应的优化条件,即投料摩尔比为2.1∶1.0,对甲苯磺酸、环己烷和甲醇的用量分别为反应基础物的4.0%,580%和430%,反应时间6小时。该方法具有原料易得,工艺简单,反应时间短等优点。制得的成核剂对PP和PE的结晶度影响明显,成核剂的添加量为0.3%-0.5%时,结晶度达到最大值。

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    CN-104211985-ADecember 17, 2014中国石油化工股份有限公司, 中国石化催化剂有限公司Aluminum hydroxide-containing nucleating agent and preparation method thereof