Transparent nylon material and preparation method thereof

Abstract

The invention discloses a transparent nylon material and a preparation method thereof, and the preparation raw materials of the transparent nylon material comprise the following components in percentage by mass: 50-80% of a component A, 5-25% of a component B, 5-25% of a component C and 0.01-2% of a catalyst, wherein the component A is a prepolymer prepared from aliphatic branched-chain-containing long-chain diamine and aliphatic long-chain dicarboxylic acid according to a molar ratio of 1: 1, the component B is a prepolymer prepared from para-aromatic diamine and aromatic dicarboxylic acid according to a molar ratio of 1: 1, and the component C is a lactam compound. The catalyst is selected from at least one of hypophosphite, titanium dioxide and vanadium pentoxide. As the benzene ring of the prepolymer B destroys the regularity of a macromolecular chain, a fine and uniform crystal structure is favorably formed, the light transmittance of the product is improved, the prepolymer A belongs to aliphatic transparent polyamide, and the stability and the chemical corrosion resistance of the product are effectively improved by combining the stable benzene ring structure of the prepolymer B.

Description

technical field [0001] The invention relates to the technical field of polymer material nylon synthesis, in particular to a transparent nylon material and a preparation method thereof. Background technique [0002] Transparent nylon material is a kind of special polyamide with amorphous structure or microcrystalline structure, which has higher mechanical strength than conventional transparent materials such as polycarbonate PC, polymethyl methacrylate PMMA, polystyrene PS, etc. , thermal stability, excellent corrosion resistance, scratch resistance and stress crack resistance, etc., not only can be used for beverage and food packaging, but also can be used as packaging materials for precision instruments, meters, pharmaceutical and chemical industries, production of moisture-proof, disinfectant Shock cushions and foamed sheets, etc., have good tensile strength, impact strength, rigidity, wear resistance, chemical resistance, surface hardness and other properties. [0003] D...

AI Technical Summary

Problems solved by technology

[0003] Due to the presence of aromatic monomers in the existing transparent nylon materials, the polymerization temperature in the preparation process is high, the color is easy to change, the synthesis process is complicated, and the processing technology is also demanding. It is difficult to produce large-scale industrial production. The infrared transmittance of nylon material products is low, and it is difficult to meet the needs of industrial applications that require high infrared transmittance. Moreover, in some pharmaceutical and food fields that require high cleanliness of packaging materials, it is necessary to The packaging materials are sterilized with alcohol or ultraviolet rays, while the existing transparent materials such as PC, PMMA and PS have low tolerance to 75% alcohol, and the surface will change after being wiped with alcohol, which is prone to cracks and has a long service life. Shorter, which increases production costs

Images