Low-melting point polyester synthesis method

A technology of low melting point polyester and synthesis method, applied in the field of low melting point polyester synthesis, can solve the problems of serious side reactions, unstable product performance, etc., achieve stable product quality, easy mass production conversion, and solve serious side reactions. Effect

Active Publication Date: 2007-05-16
厦门翔鹭化纤股份有限公司 +1
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  • Abstract
  • Description
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for synthesizing low-melting polyester with a melting point of 100-160°C. By selecting suitable monomers to participate in copolymerization, the serious side reactions and product performance problems in the reaction process are solved. Instable problems can be achieved by using existing batch, semi-continuous, continuous and other polymerization devices to realize industrial production

Method used

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  • Low-melting point polyester synthesis method

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Embodiment Construction

[0035] The synthetic method of low melting point polyester is described in detail by 5 groups of examples below:

[0036] The semi-continuous polymerization process flow is adopted, and the test device is a 500kg / batch semi-continuous pilot-scale polymerization device, as shown in the main flow chart 1.

[0037] Accurately weigh each raw material according to the required molar ratio: terephthalic acid, isophthalic acid, azelaic acid, ethylene glycol, neopentyl glycol, put them into the beating kettle 1 from the feeding port a, and then add 0.01% by weight The stabilizer trimethyl phosphate (relative to the acid component) is made into a uniform slurry at room temperature, and the slurry screw pump speed is set to 25HZ, and the slurry is evenly added to the esterification kettle with half the amount of the previous batch of esterification liquid Carry out the esterification reaction in 2, control the reaction to carry out under normal pressure ~ 0.01MPa, the reaction temperatu...

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Abstract

The invention discloses a synthesizing method of low-fusing point polyester, which comprises the following steps: adopting terephthalic acid and ethandiol as raw material; possessing 15-40% m-phthalic acid, 5-25% azelaic acid and 2-10% neopentyl glycol with the molar rate of acid and alcohol at 1: 1.1-1.3; allocating even slurry; esterifying; condensing to synthesize low-fusing point polyester with fusing point at 100-160 Deg C.

Description

technical field [0001] The present invention relates to a kind of synthetic method of low-melting point polyester, especially relate to a kind of esterification reaction and polycondensation reaction using terephthalic acid, isophthalic acid, azelaic acid, ethylene glycol and neopentyl glycol as monomers A synthetic method for producing low-melting-point polyester with a melting point of 100-160°C. Background technique [0002] Low-melting point polyester is a polymer with good compatibility with conventional polyester (PET). It is generally synthesized by copolymerization and modification of PET. Its melting point is 80-200°C. The staple fibers produced by spinning can be widely used in the nonwovens industry. It provides a convenient method for the production of non-woven fabrics, the method of bonding non-woven fabrics with low-melting point fibers replaces environmentally unfriendly water-based adhesives, and has the advantages of environmental protection, high bonding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/181C08G63/46
Inventor 陈耀南
Owner 厦门翔鹭化纤股份有限公司
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