Preparation method of supermolecular intercalated structure light-ageing-resistant material

Abstract

The invention provides a preparation method of a supermolecular intercalated structure light-ageing-resistant material. The light-ageing-resistant material is obtained by intercalating an ultravioletabsorbent and a hindered amine light stabilizer to LDH (layered double hydroxide). The preparation method comprises the following steps: preparing an ultraviolet absorbent intercalated layer LDH by acoprecipitation method, performing reaction on the hindered amine light stabilizer and the ultraviolet absorbent intercalated layer by utilizing the alkaline difference between the hindered amine light stabilizer and the ultraviolet absorbent and by virtue of strong alkali, and replacing the LDH interlayered weak alkaline ultraviolet absorbent by the strong alkaline hindered amine light stabilizerto obtain the hindered amine light stabilizer and the ultraviolet absorbent intercalated layer LDH. By the method, the use amount of the expensive hindered amine light stabilizer is reduced, the utilization rate of the hindered amine light stabilizer is greatly increased, the preparation cost of the hindered amine light stabilizer and the ultraviolet absorbent intercalated layer LDH is reduced; furthermore, the preparation method has the following advantages: the preparation method is simple to operate; the reaction condition is mild; the molar ratio of the interlayered hindered amine light stabilizer to the ultraviolet absorbent is easy to regulate and control; and industrialized production is facilitated.

Description

technical field [0001] The invention relates to the preparation of an anti-photoaging material, in particular to a preparation method of a supramolecular double-guest co-intercalation structure anti-photoaging material. Background technique [0002] Light stabilizers are a kind of functional additives used to improve the anti-light aging performance of plastics. Their principle of action is mainly to achieve the purpose of anti-light aging by absorbing and transferring ultraviolet light energy, shielding and blocking ultraviolet light or capturing free radicals. Light stabilizers are generally compounded and modified with plastics by physical mixing, and are highly dispersed in plastic products to give full play to the protective effect of light stabilizers, reduce the photooxidative degradation of plastics, and achieve the purpose of extending the service life of plastics. However, most light stabilizers are organic substances with small molecular weight, and have disadvant...

AI Technical Summary

Problems solved by technology

[0006] Although the above literature methods can prepare supramolecular intercalation structure materials, these preparation methods have many defects in the preparation of hindered amine light stabilizer intercalation LDH, such as the need for a large amount of guest, generally more than 3 times the theoretical amount, resulting in reaction Finally, more than 60% of the objects are discharged in the form of waste liquid, which is difficult to recycle, and the utilization rate of hindered amine light stabilizers does not exceed 40%.

Moreover, it is not easy to control the amount of intercalation when the hindered amine light stabilizer is co-intercalated with other guests to intercalate LDH anti-aging materials by the above method, which often results in only one kind of guest entering the interlayer.

Images