Paint-spraying-free lamp plastic with metal effect and preparation method of paint-spraying-free lamp plastic

By adding modified polysiloxane and other additives to the lamp plastic, the paint-free lamp plastic with metal effect is prepared, which solves the problem of yellowing after long-term use of the lamp plastic, and achieves the effect of improving light and heat resistance, and extends the service life of the lamp.

CN119708738AActive Publication Date: 2025-03-28JIANGXI WANGLAI TECH CO LTD
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Patent Information

Application Number
CN202510228355.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-28
Publication Date
2025-03-28
Estimated Expiration
2045-02-28

AI Technical Summary

Technical Problem

At this stage, lamp plastics are prone to yellowing after long-term use, affecting their toughness and strength, and thus shortening the service life of lamps.

Method used

A spray-free lamp plastic with metal effect is used. The preparation method includes pretreating and modifying raw materials such as methyl methacrylate, hydroxyethyl methacrylate and azobisisobutyronitrile, followed by addition of modified polysiloxane, aluminum powder, carbon black, antioxidant and dispersant, and producing spray-free lamp plastic with metal effect through melt extrusion.

Benefits of technology

Through the dynamic cross-linking of modifiers and the action of hindered amines, this material can effectively prevent ultraviolet aging, improve heat-resistant aging, and extend the service life of lamps.

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Abstract

The invention discloses paint-spraying-free lamp plastic with a metal effect and a preparation method of the paint-spraying-free lamp plastic. The lamp plastic is prepared from the following raw materials in parts by weight: 80 to 90 parts of modified polymethacrylate, 3 to 5 parts of modifier, 1.5 to 2.5 parts of aluminum powder, 0.02 to 0.05 part of carbon black, 0.1 to 0.3 part of antioxidant and 0.2 to 0.3 part of dispersing agent, molecules of the lamp plastic contain chelated rings formed by hindered amine and intramolecular hydrogen bonds, after the chelated rings are irradiated by ultraviolet light, light energy is converted into heat energy to be released, hindered phenol can capture free radicals, then the aging rate of the lamp plastic is reduced, dynamic crosslinking can be generated when a modifier and modified polymethacrylate are subjected to melt extrusion, and the service life of the lamp plastic is prolonged. And meanwhile, the modifier molecules contain organic silicon chain segments, so that the heat aging resistance of the plastic can be further improved, and the plastic is not easy to crack under the action of external force, so that the service life of a lamp is prolonged.
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Citation Information

Patent Citations

  • Processes for preparing thermoplastic elastomers

    CA2015302A1

  • Paint-free lamp plastic with metal effect and preparation method of paint-free lamp plastic

    CN109320873A

  • Antiskid coating for ceramic tile surface and preparation method thereof

    CN118126588A

  • Impact modifier compositions which enhance the impact strength properties and lower the viscosity of melt processed plastics resins, and methods of making said compositions

    EP1008622A1

  • Multilayer structure with a high impact resistance, high melt flow, low water haze cap layer

    US20240002651A1

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