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Preparation method and application of soft-base curing component material

A technology of polypropylene composition and hindered amine light stabilizer, which is applied in the field of preparation of soft-base curing treatment component materials, can solve the problem of not considering the synergistic effect of light stabilizer, short weather resistance, light stabilizer and antioxidant being easily damaged. damage and other problems, to avoid changes in mechanical properties and color, high anti-oxidation ability, and solve the effects of thermo-oxidative aging

Active Publication Date: 2017-06-20
TIANJIN SHUNKANG TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polypropylene is very sensitive to ultraviolet rays, and is relatively insufficient in weather resistance and heat resistance. It is prone to aging and degradation after the action of ultraviolet rays, heat, and oxygen, resulting in performance degradation and discoloration. These shortcomings limit the use of PP, especially Restrict the application of PP in outdoor packaging products, especially for products that are placed outdoors for a long time with weather resistance requirements. The weather resistance of PP must be improved in order to expand the application field of PP
[0003] In the prior art, the weather resistance of polypropylene is generally improved by adding heat stabilizers and light stabilizers. The selected stabilizers are generally a single hindered amine light stabilizer, a single antioxidant or compounded with an appropriate amount of ultraviolet rays Absorbents, but often do not consider the synergistic effect between light stabilizers, the antagonistic effect between light stabilizers and some antioxidants, the compatibility of light stabilizers and resins, and the effect of light stabilizers on the mechanical properties of PP And the influence of color on the weather resistance of products, etc.
If the choice is not appropriate, the light stabilizer is mixed with other materials, which will cause the light stabilizer and antioxidant to be easily destroyed, thus affecting the antioxidant and the light stabilizer cannot exert the maximum effect, resulting in the weather resistance and heat resistance of the material. performance drops drastically
In addition, the PP currently used in the packaging field in China generally requires relatively short weather resistance, and generally only meets the standard of ASTM G-154, that is, it only meets the weather resistance of ultraviolet aging for 200h, and the product strength is retained by 50%. It can be used outdoors for about 1 year, which seriously limits the wider range of use of the product

Method used

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  • Preparation method and application of soft-base curing component material
  • Preparation method and application of soft-base curing component material
  • Preparation method and application of soft-base curing component material

Examples

Experimental program
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preparation example Construction

[0042] The preparation method of the polypropylene composition of the foregoing Examples 1-4 includes the following steps:

[0043] Step 1: Weigh each raw material in parts by weight;

[0044] Step 2: Mix polypropylene, composite light stabilizer, composite antioxidant and dispersant in a high-speed mixer for 3 minutes to obtain a mixture;

[0045] Step 3: Stir the ultrafine carbon black and coupling agent mixer for 5 minutes to obtain a mixture;

[0046] Step 4: Extrude the mixture in step 2 and the mixture in step 3 from the main feed port and side feed port of the twin-screw extruder to extrude and granulate, and finally obtain the product; the processing temperature is 200°C, the screw speed It is 500RPM, the screw length to diameter ratio is greater than 40, the temperature control zone of the extruder is greater than zone 8, and the side feed port is located in zone 4 or zone 5.

[0047] Table 2

[0048]

[0049] The experimental method in Table 2 is tested in accordance with the ...

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Abstract

Provided are a preparation method and a use of a material for a soft foundation curing treatment member. The material for a soft foundation curing treatment member is a polypropylene composition. The polypropylene composition is prepared from the following raw materials in parts by weight: 90-95 parts of polypropylene, 1.5-2 parts of a composite light stabilizer, 1-2 parts of a composite antioxidant, 2-3 parts of ultrafine carbon black, 0.3-0.5 part of a coupling agent and 1-2 parts of a dispersing agent. The antioxidant and the light stabilizer in the formula of the polypropylene composition can have the maximum efficacy; when used as a packaging material thin preparation, the prepared polypropylene composition has an excellent super weather resistance, and can be aged for 1500 hours under UVB ultraviolet with a tensile strength and the elongation at break of polypropylene remaining at no less than 80%, i.e., after being used outdoors for 7-8 years, the mechanical properties of the preparation can also remain at no less than 80%, which is drastically improved when compared with an outdoor use time of about 1 year of a product currently available on the market.

Description

Technical field [0001] The invention belongs to the field of soft foundation curing treatment component materials, and particularly relates to a preparation method and application of a soft foundation curing treatment component material. Background technique [0002] The main structure of the soft base curing treatment member material is made of polypropylene base cloth. Polypropylene (PP for short) is a thermoplastic resin that can be made by polymerizing propylene. It not only has the advantages of good processability, good toughness, and good chemical stability, but also light weight and low cost, so it is widely used. Such as can be used in the packaging field. However, polypropylene is very sensitive to ultraviolet rays, and is insufficient in terms of weather resistance and heat resistance. It is prone to aging and degradation after the action of ultraviolet rays, heat, and oxygen, resulting in performance degradation and discoloration. These shortcomings limit the use of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/06C08K13/02C08K5/524C08K5/00C08K3/04
CPCC08K3/04C08K5/005C08K2201/005C08L23/12
Inventor 史先锋陈曦肖仕龙
Owner TIANJIN SHUNKANG TECH DEV CO LTD
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