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Photoaging-resistant polycarbonate material, endurance plate and preparation method of endurance plate

A polycarbonate, light-aging-resistant technology, applied in the field of plastic sheets, can solve the problems of light-aging, yellowish color and hue change, etc.

Active Publication Date: 2020-10-20
无锡希尔丽塑胶板材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, polycarbonate itself is not resistant to ultraviolet rays, and it is prone to photoaging under long-term sunlight when it is used in outdoor occasions such as light-shielding and rain-shielding ceilings.
The most significant and direct apparent change in the photoaging of the endurance board is "yellowing" - the active free radicals produced by the degradation of polycarbonate under the action of ultraviolet rays react with water and oxygen to form yellow substances, resulting in the decrease of the transparency of the endurance board, The color light is yellowish or the hue changes, which will affect the use

Method used

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  • Photoaging-resistant polycarbonate material, endurance plate and preparation method of endurance plate
  • Photoaging-resistant polycarbonate material, endurance plate and preparation method of endurance plate
  • Photoaging-resistant polycarbonate material, endurance plate and preparation method of endurance plate

Examples

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Effect test

preparation example 1-5

[0045] The yellowing inhibitors of Preparation Examples 1-5 are all made of PMMA porous microspheres, anti-ultraviolet agent, coupling agent KH570, copper sulfate and stearate, and PMMA porous microspheres, anti-ultraviolet agent, coupling agent KH570 , The mass ratio of copper sulfate and sodium stearate is 1:0.8:0.3:(0.1-0.5):(0.4-0.8). The anti-ultraviolet agent is formed by mixing nano-silicon dioxide and at least one benzotriazole ultraviolet absorber in a mass ratio of 1:1. In Preparation Examples 1-5, the anti-ultraviolet agent is composed of nano-silicon dioxide and 2-(2 -Hydroxy-5-methylphenyl)benzotriazole mixed at a mass ratio of 1:1.

[0046]The specific preparation process of the yellowing inhibitor is:

[0047] P1. Mix the anti-ultraviolet agent and copper sulfate at 3500-5000rpm for 10-15min;

[0048] P2, add PMMA porous microspheres and silane coupling agent and continue mixing for 5-10min;

[0049] P3. Add sodium stearate and continue mixing for 5-10 minute...

Embodiment 1-5

[0057] Examples 1-5 all relate to a endurance board, and its raw material ratio is shown in Table 2.

[0058] Table 2. Raw material ratio table of embodiment 1-5 endurance board

[0059]

[0060] The polycarbonate used has an average molecular weight of 45,000 (by GPC), from Hubei Jusheng Technology Co., Ltd.;

[0061] The average molecular weight of polymethyl methacrylate is 40,000 (by GPC), from Sigma-Aldrich; 2-diphenylphosphoryl-1,4-benzenediol, with a purity of ≥99.5%, is from Alpha Chemical Co., Ltd. of the United States; 10-( 2,9-dihydroxynaphthyl)-10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide, purity ≥ 99.5%, from Alpha Chemical Co., Ltd. of the United States; 10-(2,5-di Hydroxyphenyl)-10-hydrogen-9-oxa-10-phosphaphenanthrene-10-oxide, purity ≥ 99.5%, from Alpha Chemical Co., Ltd. of the United States; antimony trioxide, purity ≥ 99%, from Sinopharm Group Chemical Reagent Co., Ltd.; iron oxide pigment, 325 mesh, from Shanghai Shenhong Pigment Co., Ltd.; R818 ...

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Abstract

The invention relates to the field of plastic plates, and particularly discloses a photoaging-resistant polycarbonate material, an endurance plate and a preparation method of the endurance plate. Thephotoaging-resistant polycarbonate material is prepared from the following raw materials: 1,2-bis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine and a yellowing inhibitor. The yellowing inhibitor is prepared from PMMA porous microspheres, an anti-ultraviolet agent, a coupling agent, copper sulfate and stearate in a specific ratio through a special process. The preparation method of the endurance plate comprises the steps of conducting melt blending on the weighed polycarbonate, polymethyl methacrylate and 1,2-bis[beta-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine to obtain a primary mixture; adding a weighed flame retardant, a weighed colorant and the yellowing inhibitor into the primary mixture, and continuing melt blending to obtain a mixture; and carrying out extrusion molding on the mixture, and conducting cooling and shaping to obtain the endurance plate. The endurance plate provided by the invention has excellent comprehensive physical and mechanical properties, good flame retardancy and light aging resistance, and can tolerate sunlight for a long time without obvious yellowing.

Description

technical field [0001] The invention relates to the field of plastic plates, more specifically, it relates to a light aging resistant polycarbonate material, an endurance board and a preparation method for the endurance board. Background technique [0002] Polycarbonate (PC, Polycarbonate) is a transparent thermoplastic material, its light transmittance can reach more than 95%, and it has the characteristics of rigidity and toughness, high impact strength, excellent dimensional stability and high Heat resistance, good electrical insulation and non-toxicity, can be molded by injection and extrusion. [0003] Endurance board is a kind of transparent or translucent board made of polycarbonate as the main raw material, also known as polycarbonate board or Capron board, because of its high transparency, light weight, impact resistance, sound insulation, heat insulation, And other characteristics, has the incomparable advantages of other building decoration materials, so plastic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L33/12C08K13/02C08K3/30C08K5/098C08K5/25C08K3/36C08K5/3475C08K3/22C08K5/5313
CPCC08L69/00C08L2201/08C08L2201/02C08L2205/18C08L2205/025C08L2205/03C08K2003/3045C08K2201/011C08L33/12C08K13/02C08K3/30C08K5/098C08K5/25C08K3/36C08K5/3475C08K3/2279C08K5/5313
Inventor 唐德云
Owner 无锡希尔丽塑胶板材有限公司