Copolymerized high fluidity cationic polyester masterbatch matrix material and preparation method thereof

Abstract

The invention relates to a copolymerized high-fluidity cationic polyester masterbatch matrix material and a preparation method thereof. The preparation method includes: well mixing binary acid I, binary acid II and diol I for esterification reaction, introducing a high-fluidity branched structure modifier after esterification reaction is finished for pre-polycondensation reaction and final polycondensation reaction to obtain the material, wherein the high-fluidity branched structure modifier is a hydroxy-terminated esterification product obtained through reaction between branched-structure acid or anhydride and diol II. Melt index of the material is 8-15g / 10min, and viscosity is lowered to smaller than or equal to 0.02dL / g in the process of melt processing. The preparation method is simplein process and low in cost; the material prepared by the method has excellent fluidity and can effectively improve phenomena like fiber broken filament and broken end when being mixed with polyestermelt, thereby being high in fiber dyeing rate and color fastness and excellent in using comfort.

Description

technical field [0001] The invention belongs to the field of polyester preparation, and relates to a copolymerized high-fluidity cationic polyester masterbatch matrix material and a preparation method thereof. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polyacids, mainly referring to polyethylene terephthalate (PET), and customarily including polybutylene terephthalate (PBT) and polyarylate, etc. Linear thermoplastic resins are a class of polymers with excellent performance and a wide range of uses. They have been widely used in the fields of fibers, plastics and films. With the diversified demand for clothing fiber products, the development of new polyester fiber materials is becoming more and more urgent. [0003] At present, the development direction of new polyester and fiber products mainly includes copolymerization modification, blending modification and surface coating finishing. Although the mol...

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Problems solved by technology

But there are the following problems: the fluidity of the cationic copolyester formed by the method of copolymerization modification drops sharply, because the copolyester contains sulfonate group, the strong force between the group and the group and the reaction The force on the inner wall of the vessel and the pipeline is relatively large, resulting in poor fluidity, which causes certain difficulties in cleaning cationic polyester melt pipelines. In order to solve this problem, Chinese patent CN103658121A discloses a cationic polyester melt A pipeline cleaning device and its cleaning method, but this method has led to the inability to realize continuous operation of production and greatly increased costs

The above patented technologies all use cationic masterbatches to blend and modify polyester. In order to improve the fluidity of cationic masterbatches, a certain proportion of lubricants are added to the masterbatches. The lubricants are stearates. However, this type of lubricant is an aliphatic linear segment, which has limited promotion of the fluidity of the sulfonate. At the same time, the stearate is blended in the matrix, and the compatibility with the polyester is general, and the thermal stability in the process of processing remains to be seen. Discuss

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