Normal atmosphere cation-dyeable flame-proof copolyester slice and its production method

Abstract

The invention discloses a flame retardant copolyester chip dyeable by normal pressure cationic dyes and a manufacturing method thereof. It uses terephthalic acid and ethylene glycol as basic raw materials and is produced by a semi-continuous direct esterification method. Or add reactive phosphorus-containing flame retardant, sulfonic acid metal base-containing isophthalic acid component and composite stabilizer in the polycondensation stage, and make modified copolyester through random and block copolymerization. The finished product of the invention not only has long-lasting and excellent flame-retardant performance, but also has high thermal stability and good spinnability, and the fiber fabric made from it can be dyed with cationic dyes under normal pressure, with high color fastness, bright colors and complete color spectrum.

Description

technical field [0001] The invention belongs to the technical field of polyester chemical industry, and in particular relates to a normal-pressure cationic dyeable flame-retardant copolyester chip and a manufacturing method thereof. Background technique [0002] With the improvement of people's awareness of fire protection, the research and application development of flame-retardant polyester and fiber are becoming more and more active all over the world, and various flame-retardant polyester and fiber products are constantly coming out. There are two methods of flame retardant modification of polyester: blending and copolymerization. The copolymerization method is to add a compound containing two or more active functional groups and certain flame retardant elements in the polyester production process as a flame retardant monomer through copolymerization. Compared with the blending method, the method of flame retardant modified polyester has become the main method and means ...

AI Technical Summary

Problems solved by technology

[0003] The flame retardants used for flame-retardant modification of polyester are mainly halogen-containing and phosphorus-containing flame retardants. Since halogen belongs to the gas-phase flame-retardant mechanism, it has the disadvantages of large smoke and easy generation of halogen gas that corrodes processing equipment. At present, basic Both use phosphorus-containing flame retardants, but the existing phosphorus-containing flame-retardant copolyesters generally have poor thermal or mechanical properties, and difficulty in spinning and crystallization. Therefore, further research and development of high-performance flame-retardant polyesters is very important. necessary

[0004] In addition, flame-retardant polyester fiber fabrics are mostly used for decorative fabrics such as automobiles and curtains, and have extremely high requirements for color style and color fastness (especially light fastness). It is less durable and can only be dyed with disperse dyes, which is easy to fade, thus limiting the application of flame retardant modified polyester

[0005] The method of producing flame-retardant-cationic polyester staple fiber by transesterification has been reported, but the method has a large unit consumption and high cost, and the by-product methanol of the transesterification reaction is relatively harmful to the human body, and has high requirements for fire protection and safety.