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Hollow glass microsphere surface modification method, low density and high weather resistant polypropylene composite material and preparation method thereof

A technology of hollow glass microspheres and surface modification, which is applied in the field of low-density high weather-resistant polypropylene composite materials and their preparation, and the surface modification of hollow glass microspheres, which can solve the problem of broken microspheres and low interfacial force of glass microspheres , uneven mixing and other problems, to achieve the effect of strengthening compatibility, solving the decline of light stability, and avoiding poor compatibility

Active Publication Date: 2019-03-29
WANHUA CHEMICAL (NINGBO) CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN102604439A introduces a method for modifying the surface of hollow glass microspheres. The small molecule coupling agent and glass microspheres are directly mixed by mechanical stirring, and then heated at high temperature for reaction. Uniform or high-speed stirring will cause the microbeads to break, and at the same time, the interface force between the glass microbeads grafted with the small molecule coupling agent and PP is not high

Method used

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  • Hollow glass microsphere surface modification method, low density and high weather resistant polypropylene composite material and preparation method thereof
  • Hollow glass microsphere surface modification method, low density and high weather resistant polypropylene composite material and preparation method thereof
  • Hollow glass microsphere surface modification method, low density and high weather resistant polypropylene composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] Prepare surface-modified hollow glass microspheres, the steps are as follows:

[0061] 1) Preparation of modified polymer solution

[0062] a) Weigh each raw material according to the following weight percentage: 48.54% of alkyl methacrylate (40 parts of cyclohexyl methacrylate, 10 parts of lauryl methacrylate), 4.85 parts of long-chain silane coupling agent with double bond % (5 parts of methacryloxypropyltriethoxysilane), 9.71% of 4-methacryloxybenzophenone (10 parts of 4-methacryloxybenzophenone), Initiator 3.88% (4 parts of azobisisobutyronitrile), chain transfer agent 3.88% (α-methylstyrene dimer 4 parts), organic solvent 29.13% (30 parts of ethanol);

[0063] b) Add 30 parts by mass (parts by mass, the same below) of ethanol to the reactor and raise the temperature to 80°C, add 40 parts of cyclohexyl methacrylate, 10 parts of lauryl methacrylate, 10 parts of 4-methacryloyloxy Base benzophenone, 4 parts of azobisisobutyronitrile, and 4 parts of α-methylstyrene di...

Embodiment 2-9

[0069] Prepare surface-modified hollow glass microspheres, the preparation method is the same as in Example 1, and the specific conditions are as follows in Table 1:

[0070] Table 1 embodiment 2-9 raw material ratio and reaction conditions

[0071]

Embodiment 10

[0073] The raw material is composed of: 48-98% of polypropylene, 0.2-1% of heat stabilizer, 0.2-1% of lubricant, 0-20% of toughening agent, 1-15% of talcum powder, and surface-modified hollow glass microspheres ( Example 1 preparation) 1-15%.

[0074] 69 parts (parts by mass, the same below) polypropylene, 0.2 part tetrakis [β-(3', 5'-di-tert-butyl-4'-hydroxyphenyl) propionate] pentaerythritol ester (primary antioxidant), 0.2 Parts of three (2,4-di-tert-butyl) phosphite (secondary antioxidant), 0.6 parts of magnesium stearate (lubricant), 10 parts of POE (ethylene, octene copolymer), 10 parts of talc, 10 parts of surface-modified hollow glass microspheres (prepared in Example 1).

[0075] Preparation method: Weigh the above-mentioned raw materials in proportion, put them into a high-speed mixer and mix them for 3-10 minutes, then place the mixed raw materials in a place with an aspect ratio of 48:1, a screw speed of 200r / min, and a temperature of 195-215°C. It is melted and ...

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Abstract

The invention relates to a hollow glass microsphere surface modification method, a low density and high weather resistant polypropylene composite material and a preparation method thereof. According to the hollow glass microsphere surface modification method, a macromolecular modified polymer with a long main chain and side chain structure is prepared and is subjected to reaction grafting to a hollow glass microsphere surface. In terms of the low density and high weather resistant polypropylene composite material, polypropylene is filled with the surface modified hollow glass microspheres, through surface chemical grafting of a polymer, a light stabilizer and an ultraviolet absorbent, the glass microspheres can achieve excellent compatibility with polypropylene, the composite material canhave outstanding tensile, impact resistant, bending and other performance, and has reduced density, thus meeting the light weight development requirements of materials, at the same time the chemicallygrafted light stabilizer and ultraviolet absorbent avoid the migration of conventional weather-resistant small molecular additives, so that the composite material can have higher weather resistance,and at the same time the risks of frosting and sticking on the material surface are reduced.

Description

technical field [0001] The invention belongs to the technical field of polypropylene composite materials, and relates to a method for modifying the surface of hollow glass microspheres, a low-density high-weather-resistant polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene is a general-purpose plastic with low price and excellent mechanical properties. With the development of polypropylene preparation and processing technology and the demand for lightweight automobiles, more and more interior and exterior trims of automobiles use polypropylene composite materials. [0003] Although polypropylene has excellent comprehensive mechanical properties, there are still some shortcomings that cannot be ignored, such as poor low-temperature impact resistance, large molding volume shrinkage, poor creep resistance, poor scratch resistance, etc. These shortcomings limit the use of polypropylene. Therefore, it needs to be modifie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C08L23/10C08L87/00C08K13/02C08K3/34C08K5/134C08K5/526C08K5/098
CPCC08G83/001C08L23/10C08L2205/03C08L87/005C08K13/02C08K3/34C08K5/1345C08K5/526C08K5/098
Inventor 陆佳伟李保印陈海波
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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