A kind of preparation method of antibacterial and high temperature resistant copolyester

Abstract

The invention belongs to the technical field of functional polymer materials, and discloses a preparation method of an antibacterial and high temperature resistant copolyester. The preparation method comprises the following steps: (1) adding a dihydric alcohol, an aromatic dibasic carboxylic acid and a catalyst to a reaction device , the esterification reaction is carried out under the action of protective gas; the dihydric alcohol includes ethylene glycol, isosorbide and dihydroxy quaternary ammonium salt, and the aromatic dicarboxylic acid is terephthalic acid or / and p-naphthalene dicarboxylic acid formic acid; (2) polycondensing the reaction mixture obtained after the reaction in step (1) is completed under vacuum conditions to obtain an antibacterial and high temperature resistant copolyester. By adopting the method of the invention, a kind of polyester with quaternary ammonium salt ion groups grafted on the molecular chain is prepared, the polyester has excellent antibacterial performance and high temperature resistance, and it does not contain toxic and harmful components, and has lasting antibacterial performance. The antibacterial agent will not be precipitated during use, which meets the requirements of today's society for hygiene and safety, and has broad market demand and promotion and application value.

Description

technical field [0001] The invention relates to the technical field of functional polymer materials, in particular to a preparation method of an antibacterial and high temperature resistant copolyester. Background technique [0002] Polyester is a general term for polymers obtained by polycondensation of polyols and polyacids. Polyester has excellent physical and chemical properties, such as high strength, good transparency, high glass transition temperature, etc., and is suitable for many different fields, including polyester fibers, plastic bottles, polyester films, etc. Due to the high added value, polyester plastic bottles have always been the application products of many manufacturers with fierce competition. [0003] Although there are corresponding products on the market for high temperature polyester, the polyester bottle with long-lasting spectrum antibacterial properties is still blank, and it is also an important aspect of polyester material modification. [000...

AI Technical Summary

Problems solved by technology

[0003] Although there are corresponding products on the market for high-temperature-resistant polyester, polyester bottles with long-term spectrum antibacterial properties are still blank, which is also an important aspect of polyester material modification

[0004] Patent CN108285531A discloses a preparation method of antibacterial polyester, which provides a method of melting and adding antibacterial agent into polyester particles, but the additive is easy to migrate, which is not suitable for high-end transparent polyester bottle field

Patent No. CN110128771A discloses a preparation method of an antibacterial polyester material, which uses an inorganic silver-loaded series antibacterial agent, which is added in a melt blending manner, and the polyester material provided by it has neither high temperature resistance nor It is difficult to meet the purpose of safe, stable and long-acting antibacterial

Patent CN108676340A discloses a kind of unsaturated polyester material with good antibacterial performance, which also uses melt blending to add antibacterial agent, and the additive contains glass fiber for modification and reinforcement, which affects its transparency and can only be used for switches. , Household electrical appliances and other products cannot be used in the field of high-end polyester transparent bottles

No. CN104892914B patent provides a kind of aliphatic polyester ionomer, is that aliphatic dibasic acid, aliphatic dibasic alcohol and quaternary ammonium salt ionic monomer are according to molar ratio, under nitrogen protection successively through esterification, polycondensation The resulting product has a high intrinsic viscosity and is suitable for the film field, but it cannot meet the needs of high-end polyester transparent bottles

[0005] To sum up, there is still a lack of high-end products with excellent high-temperature resistance and antibacterial properties in the field of polyester bottles, and it is urgent to develop a corresponding antibacterial and high-temperature-resistant polyester product to meet the urgent needs of the market

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