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UVC-resistant ASA resin composition and preparation method thereof

A technology of ASA resin and composition, which is applied in the field of polymers, can solve the problems of easy warping and deformation, unstable shrinkage rate, and inability to cover radiation energy, and achieve the effects of reducing degradation, improving discoloration and physical property deterioration

Active Publication Date: 2021-07-09
SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are some problems in the use of PP materials, such as unstable shrinkage, easy warping and deformation, etc. At the same time, it uses a UVC light source with low irradiance energy, and the irradiance energy cannot cover the needs of existing products.

Method used

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  • UVC-resistant ASA resin composition and preparation method thereof
  • UVC-resistant ASA resin composition and preparation method thereof
  • UVC-resistant ASA resin composition and preparation method thereof

Examples

Experimental program
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Embodiment 1～8

[0026] A preparation method of UVC-resistant ASA resin, the method may further comprise the steps:

[0027] According to the weight percentage of the formulation ingredients in Table 1, the raw materials are added to the high-speed mixer and mixed thoroughly, and then placed in the screw machine, at an extrusion temperature of 180-250 ° C and a screw speed of 200-500 rpm. Melt extrusion, cooling and granulation to obtain the product.

[0028] Wherein, the material of Table 1 is as follows:

[0029] SAN: The weight-average molecular weight is 120,000, the acrylonitrile content is 32%, choose Kumho SAN 350

[0030] ASA: Choose Kumho XC-500

[0031] PMMA1: Melt index 1000g / 10min, test condition, 220°C, 10kg

[0032] PMMA2: Melt index 1500g / 10min, test condition, 220°C, 10kg

[0033] PMMA3: Melt index 2000g / 10min, test condition, 220°C, 10kg

[0034] UV absorber 1: tert-octylphenyl salicylate

[0035] UV absorber 2: 2-cyano-3-phenylethyl salicylate

[0036] UV absorber 3: 2...

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Abstract

The invention relates to a UVC-resistant ASA resin composition and a preparation method thereof. The UVC-resistant ASA resin composition comprises the following components in parts by weight: 40-74 parts of SAN resin, 20-40 parts of ASA rubber powder, 5-15 parts of PMMA resin and 1-5 parts of an ultraviolet absorbent. The UVC-resistant ASA resin composition is prepared by the following steps: adding the components into a high-speed mixer according to the weight percentage, fully mixing, putting into a screw machine, melting, extruding, cooling and granulating. Compared with the prior art, the UVC-resistant resin composition developed by the invention has the advantages that the color difference is less than 3 and the impact retention rate reaches 90% or more after UVC ultraviolet continuous irradiation (250nm, 20W continuous irradiation for 180 days), and the UVC-resistant resin composition meets the use scene requirements of most UVC.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a UVC-resistant ASA resin composition and a preparation method thereof. Background technique [0002] Due to people's concern about health, ultraviolet light disinfection equipment is more and more favored by consumers. Generally, ultraviolet disinfection equipment is composed of a lamp tube with a wavelength of 200-280nm (UVC), a casing, a bracket, etc. Since most plastic materials decompose seriously after UVC irradiation, showing obvious discoloration and obvious decline in mechanical properties, it is impossible to use plastics as housings or brackets around UVC lights. At the same time, products that need to be sterilized by ultraviolet light cannot use bare plastic. At present, the main solution is to achieve UVC resistance to ultraviolet disinfection lamps by spraying metal or plastic surfaces, so as to ensure the appearance and performance of the products. The cost of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/12C08L51/00C08L33/12C08K5/134C08K5/29C08K5/3475C08K5/132
CPCC08L25/12C08L2205/03C08L2201/08C08L51/003C08L33/12C08K5/1345C08K5/29C08K5/3475C08K5/132
Inventor 查超武红元汪策周霆
Owner SHANGHAI KUMHOSUNNY JINSHAN PLASTICS CO LTD
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