Low-melting point PTT copolyester and manufacturing method thereof

A manufacturing method and technology of copolyester, applied in the direction of single-component copolyester rayon, adhesive, etc., can solve the problems of insufficient stability and other problems, and achieve the effect of fast reaction speed, less adhesion and less side reaction

Active Publication Date: 2009-06-24
南通协鑫热熔胶有限公司
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  • Low-melting point PTT copolyester and manufacturing method thereof

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[0024] Low melting point PTT copolyester of the present invention, it forms through esterification reaction and polycondensation reaction with following monomer,

[0025] (a) Terephthalic acid (PTA) and isophthalic acid (IPA)

[0026] (b) 1,3-propanediol (PDO)

[0027] (c) Polyethylene glycol 600~6000 (PEG)

[0028] Among them, in component a, the mass ratio of terephthalic acid to isophthalic acid is between 90-50:10-50; in component c, the weight ratio of polyethylene glycol is 1-20% based on a; a The molar ratio with b is 1:1.2~1.8.

[0029] The intrinsic viscosity of the copolyester described in the present invention is between 0.70-0.90dL / g, and the melting point is between 130-200°C.

[0030] A kind of manufacture method of low melting point PTT copolyester of the present invention, this method comprises two processes of esterification reaction and polycondensation reaction;

[0031] The raw materials for the esterification reaction are: in the acid component, tereph...

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Abstract

The invention discloses a low-melting point PTT copolyester and a manufacturing method thereof. The copolyester takes terephthalic acid and 1,3-propylene glycol as basic monomers, 10-50wt% of m-phthalic acid is added to an acid component, and 1-20wt% of polyethylene glycol is added to an alcohol component with the total weight of the acid component as a reference. The mol ratio of the alcohol to the acid of the copolyester is 1.2-1.8:1, and the low-melting point PTT copolyester with the melting point of 130-200 DEG C and the inherent viscosity of 0.70-0.90dL/g is synthesized by esterification reaction and polycondensation reaction. The copolyester and the manufacturing method are characterized by fast reaction rate, a few side reactions, high crystallinity and uneasy particle adhesion, and the copolyester is applicable to spinning filament, short fiber and non-woven fabrics.

Description

technical field [0001] What the present invention relates to is a kind of modifying agent such as adding isophthalic acid, polyethylene glycol in the synthesis process of polytrimethylene terephthalate (PTT) to manufacture a kind of low melting point modified PTT copolyester product and manufacture Method, this low-melting point modified PTT copolyester product is especially suitable for filaments, short fibers and non-woven fabrics. Background technique [0002] Due to its unique "Z"-shaped macromolecular chain conformation, PTT has many excellent properties that polyethylene terephthalate (PET) and polybutylene terephthalate (PBT) do not have. PTT overcomes the rigidity of PET fiber, has both the flexibility of nylon fiber and the bulkiness of acrylic fiber, and has its own inherent characteristics such as elasticity, easy dyeing and excellent processing performance, and has become an international hot spot in the 21st century. One of the polymer materials. It has been h...

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Application Information

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IPC IPC(8): C08G63/672C08G63/78D01F6/84C09J167/02
Inventor 陈文兴秦伟明崔连臣
Owner 南通协鑫热熔胶有限公司
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