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Sprayable modified polypropylene material as well as preparation method and application thereof

A polypropylene material and polypropylene technology, applied in the field of sprayable modified polypropylene material and its preparation, can solve problems such as shedding, poor compatibility of polypropylene injection molded parts, etc., and achieve the effect of low industrial cost

Active Publication Date: 2021-08-27
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the present invention prepares a treatment-free sprayable modified polypropylene material by introducing bipolar functional groups, which can solve the problem of falling off of sprayed paint and polypropylene injection molded parts due to poor compatibility, and can Avoid spraying pre-treatment; and the amino and carboxyl groups in the bipolar functional group have universal compatibility with acrylic, epoxy, alkyd and other paints, and the paint has good universality

Method used

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  • Sprayable modified polypropylene material as well as preparation method and application thereof
  • Sprayable modified polypropylene material as well as preparation method and application thereof
  • Sprayable modified polypropylene material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Prepare the modified polypropylene material according to the following steps:

[0055] (1) Add 1000g of wollastonite JY-2000 and 30g of (3-mercaptopropyl)triethoxysilane into 10kg of absolute ethanol, heat and stir at 60°C for reaction, the stirring speed is 100rpm, and the stirring time is 1.5h. End the reaction. The reaction solution was centrifuged at 15000 rpm for 7 minutes, the solid was washed with absolute ethanol and then centrifuged, and the solid was obtained by repeating twice, and dried in a drying oven at -0.07MPaG for 3 hours at a vacuum degree of -0.07MPaG to obtain a modified silane coupling agent. Sexual wollastonite.

[0056] (2) Get 1000g silane coupling agent modified wollastonite, 30g (1R, 2S)-1-amino-2-vinylcyclopropanecarboxylic acid, 15g benzoin dimethyl ether and join in the dehydrated alcohol of 10kg, then Place it in an environment irradiated by an ultraviolet lamp and heat it for reaction. The reaction conditions are: 30° C., stirring speed...

Embodiment 2

[0066] Prepare the modified polypropylene material according to the following steps:

[0067] (1) Add 1000g of wollastonite JY-1250 and 30g of (3-mercaptopropyl)triethoxysilane into 12kg of absolute ethanol, heat and stir at 65°C for reaction, the stirring speed is 150rpm, the stirring time is 2h, and the end reaction. Centrifuge the reaction solution at 20,000 rpm for 5 minutes, take the solid and wash it with absolute ethanol, then centrifuge, repeat twice to obtain the solid, and dry it in a drying oven at -0.08MPaG for 2 hours at a vacuum degree of -0.08MPaG to obtain a modified silane coupling agent. Sexual wollastonite.

[0068] (2) Take 1000g of silane coupling agent modified wollastonite, 40g of 1-amino-2-vinylcyclopropanecarboxylic acid, 20g of benzoin dimethyl ether and add them to 12kg of dehydrated ethanol, then place them in an ultraviolet lamp irradiation environment Heating reaction under low temperature, the reaction conditions are: 40°C, stirring speed 80rpm...

Embodiment 3

[0078] Prepare the modified polypropylene material according to the following steps:

[0079] (1) Add 1000g of wollastonite JY-6000 and 50g of (3-mercaptopropyl)triethoxysilane into 15kg of absolute ethanol, heat and stir at 70°C for reaction, the stirring speed is 200rpm, the stirring time is 3h, and the end reaction. Centrifuge the reaction solution at 30,000 rpm for 2 minutes, take the solid and wash it with absolute ethanol, then centrifuge, repeat twice to obtain the solid, dry it in a vacuum degree of -0.1MPaG, and dry it in a 70°C drying oven for 1 hour to obtain a modified silane coupling agent. Sexual wollastonite.

[0080] (2) Get 1000g silane coupling agent modified wollastonite, 50g (1R, 2S)-1-amino-2-vinyl cyclopropane carboxylic acid, 30g benzoin dimethyl ether and join in the dehydrated alcohol of 15kg, then Place it in an environment irradiated by an ultraviolet lamp and heat it for reaction. The reaction conditions are: 40° C., the stirring speed is 100 rpm,...

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Abstract

The invention discloses a sprayable modified polypropylene material as well as a preparation method and application thereof, and the modified polypropylene material is prepared from the following components in percentage by mass: 40-85%, preferably 50-75%, of polypropylene; 5-20%, preferably 8-15%, of a toughening agent; 5-40%, preferably 10-35%, of bipolar functional group modified wollastonite; 0.1 to 1% of an antioxidant; and 0.1-1% of a lubricant. The problem of compatibility between polypropylene and paint is solved, the treatment-free sprayable modified polypropylene material is prepared, and the treatment-free sprayable modified polypropylene material has good compatibility with various paints and is good in universality.

Description

technical field [0001] The invention relates to a modified polypropylene, in particular to a sprayable modified polypropylene material and its preparation method and application. Background technique [0002] Polypropylene (PP), as a general-purpose thermoplastic, is widely used in the production of auto parts, such as auto bumpers and wings, due to its non-toxic, low price, low relative density, chemical corrosion resistance, high strength, and easy recycling. panels, tailgate outer panels, etc. In order to achieve the diversity of car colors, these car parts usually need to be painted. The commonly used car paints are all highly polar paints, but polypropylene is a non-polar material, which is quite different from the polarity of commonly used car paints. Large, resulting in low adhesion of car paint on the surface of polypropylene injection molded parts and easy to fall off. The conventional solution is to carry out surface pretreatment on polypropylene injection molded...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/12C08L23/08C08L23/16C08L53/02C08K13/06C08K9/06C08K9/04C08K3/34
CPCC08L23/14C08L23/12C08L23/0815C08L23/16C08L53/025C08K13/06C08K9/06C08K9/04C08K3/34
Inventor 花月庆王楷陈连清
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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