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Preparation method of core-shell talc powder-polypropylene composite material

A composite material and talc technology, applied in the polymer field, can solve the problems of uneven surface coating and large amount of coupling agent, and achieve the effect of improving surface affinity and improving performance

Active Publication Date: 2012-07-18
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing process generally has the problems of uneven surface coating and excessive coupling agent consumption.

Method used

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  • Preparation method of core-shell talc powder-polypropylene composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1), 200 g of talc powder passed through a 600 mesh sieve and 0.2 g of coupling agent vinyl tris (β-methoxyethoxy) silane were blended for 3 minutes to obtain talcum powder activated by coupling agent;

[0022] (2) Add 40 g of the above-mentioned active talcum powder under stirring in 600 g of toluene, and maintain for 10 min to form a stable suspension; add 0.06 g of N-IV type initiator, pass propylene gas until the propylene is dissolved and balanced (P=100kPa), the total pressure of the system Maintained at 140kPa, the temperature was 30°C, and the polymerization reaction was carried out for 1h under stirring. The product was filtered, washed several times with alcohol, dried under vacuum at 40°C, and weighed; the core-shell talc-polypropylene composite material was obtained.

[0023] The composite material was filled with PP, and samples were prepared by extrusion and injection molding. The test results are shown in Table 1.

Embodiment 2

[0025] (1) 200 g of 6000-mesh talcum powder was blended with 4 g of coupling agent vinyl tris(β-methoxyethoxy)silane for 10 minutes to obtain talcum powder activated by coupling agent;

[0026] (2) Add all the above-mentioned active talc powder into 1200g of toluene under stirring, and maintain it for 10 minutes to form a stable suspension. Add 1.2g N-IV type initiator, blow propylene gas until the propylene dissolves equilibrium (P=100kPa), maintain the total pressure of the system at 140kPa, the temperature is 60°C, and polymerize for 3h under stirring. The product was filtered, washed several times with alcohol, dried under vacuum at 70°C, and weighed.

[0027] The composite material was filled with PP, and samples were prepared by extrusion and injection molding. The test results are shown in Table 1.

Embodiment 3

[0029] (1) Blend 200 g of 3000-mesh talcum powder with 2 g of coupling agent vinyl tris(β-methoxyethoxy)silane for 5 minutes to obtain talcum powder activated by coupling agent;

[0030] (2) Add 100 g of the above-mentioned active talc powder into 600 g of toluene under stirring, and maintain for 10 min to form a stable suspension. Add 0.3g N-IV type initiator, pass propylene gas until the propylene dissolves equilibrium (P=100kPa), maintain the total pressure of the system at 140kPa, the temperature is 60°C, and polymerize for 2h under stirring. The product was filtered, washed several times with alcohol, dried under vacuum at 50°C, and weighed. The composite material was filled with PP, and samples were prepared by extrusion and injection molding. The test results are shown in Table 1.

[0031] Table 1

[0032]

[0033] Under a certain filling amount, the prepared core-shell talc powder-polypropylene composite can effectively improve the rigidity and dimensional stabili...

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Abstract

The invention relates to a preparation method of a core-shell talc powder-polypropylene composite material. The method comprises the following steps of: mixing talc powder with a coupling agent for 3-10 minutes to obtain talc powder activated by using the coupling agent; adding toluene and a catalyst, introducing propylene gas till propylene is dissolved in a balanced way, keeping the total pressure of a system at 140kPa, keeping the temperature at 30-60 DEG C, and undergoing a polymerization reaction with stirring for 1-3 hours; and filtering a product, washing repeatedly with alcohol, drying in vacuum at the temperature of 40-70 DEG C, and weighing to obtain the core-shell talc powder-polypropylene composite material. The material surface of the core-shell talc powder-polypropylene composite material prepared with the method is uniformly coated by polypropylene, a special structure connected through the covalent bond of the coupling agent is formed between the polypropylene and talcum powder, the core-shell talc powder-polypropylene composite material is used for filling polypropylene and has high compatibility, the strength, toughness, heat resistance and blocking property of the polypropylene can be greatly improved, and the size stability of a product is improved.

Description

technical field [0001] The invention belongs to the technical field of macromolecules, and relates to a preparation method of a talcum powder-polypropylene composite material. Background technique [0002] Polypropylene (PP) is a thermoplastic synthetic resin with excellent performance. The product has low density, low production cost, high transparency, good chemical stability, non-toxic, easy processing, impact strength, anti-disturbance and electrical insulation. Good and other advantages, it has a wide range of applications in the automotive industry, household appliances, electronics, agriculture, construction packaging and building materials and furniture, and has become one of the fastest growing products among the world's top five synthetic resins. However, the shrinkage rate of polypropylene is large, which leads to poor dimensional stability of the product, prone to warping deformation, low rigidity, and brittle fracture at low temperature, which restricts the furt...

Claims

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Application Information

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IPC IPC(8): C08F292/00
Inventor 费彬
Owner HEFEI GENIUS NEW MATERIALS
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