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Modified polypropylene composite material for spraying and preparation method thereof

A technology of composite materials and polypropylene, which is applied in the field of modified polypropylene composite materials for spraying and its preparation, which can solve the problems of not effectively improving the bonding strength, easy peeling of paint, affecting the appearance of exterior decoration parts, and long-term use , to meet the requirements of long-term use, optimize the painting process, and achieve the effect of strong bond strength

Active Publication Date: 2019-12-10
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

By introducing a polar polymer resin into the polypropylene composite material, the surface polarity of the composite material can be increased, and the surface tension of the composite material can be increased. It is indeed an efficient and convenient way to improve the adhesion between the composite material and the paint, but This method only makes the paint easy to spray on the surface of the composite material by increasing the surface polarity of the composite material, but the bonding strength between the composite material and the paint resin has not been effectively improved. When the bonding strength is low, the paint is easy to peel off, affecting Aesthetics and long-term use of exterior parts

Method used

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  • Modified polypropylene composite material for spraying and preparation method thereof
  • Modified polypropylene composite material for spraying and preparation method thereof
  • Modified polypropylene composite material for spraying and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of a modified polypropylene composite material for spraying in this embodiment is as follows:

[0028] (1) Mix polypropylene, toughener, inorganic filler, porous silica, high-carbon chain ethoxyamide wax, antioxidant and lubricant according to the ratio in Table 1 and mix at high speed for 25 minutes. The temperature of the stirring tank is controlled. Stir and mix well at 85°C and then cool to room temperature to obtain a mixture;

[0029] (2) The mixture is put into a twin-screw extruder, melted, extruded, air-dried, and pelletized to obtain a modified polypropylene composite material for spraying, wherein each extruder in the twin-screw extruder described in step (2) The extrusion temperature in the exit zone is 60℃, 70℃, 120℃, 180℃, 200℃, 200℃, 200℃, 200℃, 210℃, 210℃, and the screw speed is 400r / min.

[0030] The inorganic filler used in this embodiment is talc, the toughening agent is ethylene-butene copolymer, the antioxidant is 1076, and the lubr...

Embodiment 2

[0032] The preparation method of a modified polypropylene composite material for spraying in this embodiment is as follows:

[0033] (1) Mix polypropylene, toughener, inorganic filler, porous silica, high-carbon chain ethoxyamide wax, antioxidant and lubricant according to the ratio in Table 1 and mix at high speed for 25 minutes. The temperature of the stirring tank is controlled. Stir and mix well at 85°C and then cool to room temperature to obtain a mixture;

[0034] (2) Put the cooled mixture in 1) into a twin-screw extruder, and obtain a modified polypropylene composite material for spraying after melting, extruding, air-drying, and granulating, wherein the double-screw extruder described in step (2) The extrusion temperature of each extrusion zone in the screw extruder is 55℃, 65℃, 110℃, 170℃, 190℃, 205℃, 205℃, 205℃, 215℃, 215℃, and the screw speed is 420r / min.

[0035] The inorganic filler used in this embodiment is wollastonite, the toughening agent is EPDM, the antioxidan...

Embodiment 3

[0037] The preparation method of a modified polypropylene composite material for spraying in this embodiment is as follows:

[0038] (1) Mix polypropylene, toughener, inorganic filler, porous silica, high-carbon chain ethoxyamide wax, antioxidant and lubricant according to the ratio in Table 1 and mix at high speed for 25 minutes. The temperature of the stirring tank is controlled. Stir and mix well at 85°C and then cool to room temperature to obtain a mixture;

[0039] (2) Put the cooled mixture in 1) into a twin-screw extruder, and obtain a modified polypropylene composite material for spraying after melting, extruding, air-drying, and granulating, wherein the double-screw extruder described in step (2) The extrusion temperature of each extrusion zone in the screw extruder is 65℃, 75℃, 115℃, 175℃, 205℃, 205℃, 210℃, 210℃, 215℃, 215℃, and the screw speed is 450r / min.

[0040] The inorganic filler used in this embodiment is mica, the toughening agent is styrene-butadiene-styrene bl...

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Abstract

The invention discloses a modified polypropylene composite material for spraying and a preparation method thereof. The modified polypropylene composite material is prepared from the following components in parts by weight: 50-75 parts of polypropylene, 15-20 parts of a flexibilizer, 20-25 parts of an inorganic filler, 2-3 parts of porous silicon dioxide, 1-3 parts of high-carbon-chain ethoxy amidewax, 0.2-0.3 part of an antioxygen and 0.2-0.3 part of a lubricant. According to the modified polypropylene composite material, high polarity of the high-carbon-chain ethoxy amide wax is used for modifying the surface of a polypropylene composite material, surface polarity and surface tension of the material are significantly improved, flame-free treatment spraying of the material is achieved, and thus paint easily coat the composite material surface; and with the help of a microporous structure of the porous silica, the paint penetrates into the composite material surface more easily in thecoating process, cured paint resin and a composite material matrix maintain high bonding strength, and the requirements for long-period use of automotive exterior decoration spraying materials can bemet.

Description

Technical field [0001] The invention belongs to the field of automobile materials, and specifically relates to a modified polypropylene composite material for spraying and a preparation method thereof. Background technique [0002] The safety, low fuel consumption and aesthetics of automobiles have become important indicators for consumers to evaluate the overall cost performance of automobiles, and they have always been the focus of attention and research in the automobile and material industries. The modification of polypropylene resin can meet the requirements for safety and dimensional assembly of automotive exterior parts, while the parts that require aesthetics need to be painted with polypropylene composite materials to increase the aesthetics of exterior parts. Therefore, after molding, polypropylene composite materials not only need to meet the needs of size assembly, but also need to have excellent adhesion between the composite material and paint, and meet the long-ter...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L23/08C08L23/16C08L47/00C08L53/02C08L91/06C08K7/26
CPCC08L23/12C08L23/14C08L2205/035C08K2201/003C08L23/0815C08L91/06C08K7/26C08L23/16C08L53/02C08L47/00
Inventor 张申伟周海闫溥蒋文远
Owner ORINKO NEW MATERIAL CO LTD
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