Aliphatic aqueous polyester graft copolymer, adhesion accelerant for improving adhesion strength on terylene fibers by starch slurry, and preparation method thereof

Abstract

The present invention relates to the field of materials, especially to a slurry for textile warp sizing, and discloses an aliphatic aqueous polyester graft copolymer and a preparation method for an adhesion accelerant for improving adhesion strength on terylene fibers by a starch slurry, wherein the main chain of the graft copolymer is a random copolymer of hydrophobic polyester chain segment aliphatic dicarboxylic acid diol ester and hydrophilic polyester chain segment aliphatic dicarboxylic acid (1,2-dihydroxy-3-propylsulfonate)ester, the graft branch chain is a random copolymer of acrylamide and a vinyl carboxylate, and the adhesion accelerant comprises, by weight, 15-28% of an aliphatic aqueous polyester graft copolymer, 1-6% of a hydroxyl plasticizer, 1-8% of an amino plasticizer, and the balance of water . The preparation process comprises: firstly synthesizing an aliphatic aqueous polyester main chain, carrying out graft copolymerization of the aliphatic aqueous polyester main chain and a hydrophilic vinyl monomer, and finally dissolving plasticizers in the aqueous slurry of the graft copolymer to obtain the adhesion accelerant.

Description

technical field [0001] The invention relates to the field of materials, and belongs to the technical field of size preparation for textile warp yarn sizing, in particular to an aliphatic water-based polyester graft copolymer and a polymer containing the copolymer for improving the adhesion of starch size to polyester fibers Strength adhesion promoter, this aqueous formulation containing aliphatic waterborne polyester graft copolymer improves the sizing performance of starch sizing on warp yarns containing polyester staple fibers. Background technique [0002] Starch and modified starch sizing is one of the most commonly used main sizing materials in sizing production. It is rich in sources, low in price, friendly to the environment, easy to be degraded by microorganisms, and can be desized by biological enzymes. The negative impact is small, so it is widely used in warp sizing production. However, with the continuous improvement of sizing and weaving production speed, the d...

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Problems solved by technology

[0004] However, even if the starch is chemically modified, the property of opposite polarity of the interface between the polyester fiber and the starch adhesive layer cannot be changed. The interface between the size adhesive layer and the polyester fiber is weak, which easily causes interface damage and cannot form Strong adhesive strength; secondly, even with some modified starch sizing, the bonding layer formed between polyester fibers is still relatively brittle and hard, with poor toughness. When deformation occurs, internal stress will inevitably be generated on the bonding interface. When the local stress exceeds the local strength, silver cracks or cracks will occur, and stress concentration will occur at the top of the crack, while the brittle and hard starch adhesive layer often forms Large internal stress and severe stress concentration, resulting in bond failure

Therefore, the bonding strength of starch and modified starch sizing to polyester fibers is generally not high, and it is difficult to effectively bond polyester fibers during the sizing process, which affects the reinforcement, wear resistance and hairiness reduction rate of warp yarns, resulting in Starch does not have high sizing quality for warp yarns containing polyester fibers

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