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Modified polypropylene for rotational molding and preparation method thereof

A polypropylene and modified technology, applied in the field of rotational molding materials, can solve the problems of poor impact resistance, poor tensile strength, and large consumption, so as to improve toughness and impact resistance, increase toughness and impact resistance Performance, the effect of increasing the service life

Inactive Publication Date: 2019-08-23
JINHUA JIETE PACKING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the increase of social demand and the maturity of the rotational molding process, the types of resins that can be used in the rotational molding process have also been greatly expanded, mainly including various specifications of polyethylene, polycarbonate, polystyrene, nylon, etc., among which polyethylene The consumption is the largest, and most of them are linear low-density polyethylene of rotational molding grade. The direction ability of plastic products is slightly insufficient
[0004] Compared with polyethylene, polypropylene has the advantages of good rigidity, good heat resistance, and environmental cracking resistance, but its impact resistance is poor, which affects its application in the direction of rotational molding products. Therefore, polypropylene Modification, making it meet the requirements of the rotational molding process has great social and economic benefits

Method used

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  • Modified polypropylene for rotational molding and preparation method thereof
  • Modified polypropylene for rotational molding and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preparation of Modified Additives 1

[0035]Preparation of silver-doped nano-silica: Add 5ml of 20% ammonia water dropwise to every liter of deionized water, adjust the pH value to 10 with 0.1mol / L sodium hydroxide solution, then add 5mg of silver nitrate, 10g of tetraethyl orthosilicate Esters, 10g of absolute ethanol, stirred for 5min, protected from light, heated to 40°C, ultrasonically stirred for reaction, added dropwise 245ml of 0.035g / L oxalic acid solution at a rate of 2d / min, while adjusting the pH of the solution to 9-10 After the dropwise addition was completed, the mixture was incubated for 2 hours, filtered with suction, and the filter cake was washed three times with absolute ethanol, and dried in vacuum at 60° C. for 12 hours to obtain silver-doped nano-silica pellets.

[0036] Coating: Place silver-doped nano-silica pellets in a low-temperature plasma reactor, use argon as the working gas, and perform low-temperature plasma treatment for 1 min under the ...

Embodiment 2

[0039] Preparation of modified additives 2

[0040] Preparation of silver-doped nano-silica: Add 5ml of 20% ammonia water dropwise to every liter of deionized water, adjust the pH value to 11 with 0.1mol / L sodium hydroxide solution, then add 5mg of silver nitrate, 10g of tetraethyl orthosilicate Esters, 10g of absolute ethanol, stirred for 5min, protected from light, heated to 40°C, ultrasonically stirred for reaction, added dropwise 245ml of 0.035g / L oxalic acid solution at a rate of 2d / min, while adjusting the pH of the solution to 9-10 , after the dropwise addition was completed, keep warm for reaction 1, filter with suction, wash the filter cake three times with absolute ethanol, and dry it in vacuum at 60° C. for 12 hours to obtain silver-doped nano-silica pellets.

[0041] Coating: Place the silver-doped nano-silica pellets in a low-temperature plasma reactor, use argon as the working gas, and perform low-temperature plasma treatment for 2 minutes under the conditions of...

Embodiment 3

[0044] Preparation of modified additives 3

[0045] Preparation of silver-doped nano-silica: Add 5ml of 20% ammonia water dropwise to every liter of deionized water, adjust the pH value to 10 with 0.1mol / L sodium hydroxide solution, then add 5mg of silver nitrate, 10g of tetraethyl orthosilicate Esters, 10g of absolute ethanol, stirred for 5min, protected from light, heated to 40°C, ultrasonically stirred for reaction, added dropwise 245ml of 0.035g / L oxalic acid solution at a rate of 2d / min, while adjusting the pH of the solution to 9-10 After the dropwise addition was completed, the mixture was incubated for 2 hours, filtered with suction, and the filter cake was washed three times with absolute ethanol, and dried in vacuum at 60° C. for 12 hours to obtain silver-doped nano-silica pellets.

[0046] Coating: place silver-doped nano-silica pellets in a low-temperature plasma reactor, use argon as the working gas, and conduct low-temperature plasma treatment for 1 min under the...

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Abstract

The invention discloses a modified polypropylene for rotational molding and a preparation method thereof, and relates to the technical field of materials for rotational molding. The modified polypropylene for rotational molding mainly comprises the following raw materials: polypropylene, ethylene propylene rubber, a modification additive, an antioxidant, a crosslinking agent, and a co-crosslinkingagent, wherein the modified additive is prepared by using silver-doped nano-silica as a core, coating the outside of the core with a 1,3:2,4-bis(3,4-dimethylobenzylideno) sorbitol layer, and then grafting octabenzone. According to the modified polypropylene for rotational molding and the preparation method, the prepared modified polypropylene has relatively good toughness and impact resistance, also has good transparency, and is suitable for using in the rotational molding process.

Description

technical field [0001] The invention relates to the technical field of rotational molding materials, in particular to a modified polypropylene for rotational molding and a preparation method thereof. Background technique [0002] The rotational molding process is to put a certain amount of powdery resin into the mold, heat the mold and rotate the mold around two mutually perpendicular axes, so that the resin is melted and coated on the surface of the cavity, and the product is obtained after cooling and demoulding. Compared with other molding methods, the investment in rotational molding equipment and molds is small, and the products have almost no internal stress. Therefore, in recent years, the society’s awareness of rotational molding products has become higher and higher. New plastic technologies and new products emerge in an endless stream. [0003] With the increase of social demand and the maturity of the rotational molding process, the types of resins that can be us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/16C08K13/06C08K9/10C08K7/18C08K3/08C08K5/132
CPCC08K2003/0806C08K2201/011C08L23/12C08L2201/08C08L2201/10C08L23/16C08K13/06C08K9/10C08K7/18C08K3/08C08K5/132
Inventor 周卫中向军蒋建斌林志杨
Owner JINHUA JIETE PACKING CO LTD