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Special polyolefin resin modified composition for rotational molded products and preparation method thereof

A technology of polyolefin resin and processed products, which is applied in the field of polyolefin resin modified composition and its preparation, which can solve the problems of appearance size change, short service life, warpage, etc., and improve dimensional stability and improve dimensional stability , The effect of shortening the production time

Active Publication Date: 2014-03-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] 2. Improving the cooling method will increase the production cost
[0013] 3. The preparation method of the heterogeneous nucleating agent is unreasonable, resulting in poor modification effect of the heterogeneous nucleating agent
[0014] The internal stress generated during the manufacturing process of large rotomolded products leads to technical problems such as changes in the appearance and size of the products, shrinkage deformation, distortion, warping, and short service life. There is no better technical solution

Method used

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  • Special polyolefin resin modified composition for rotational molded products and preparation method thereof
  • Special polyolefin resin modified composition for rotational molded products and preparation method thereof
  • Special polyolefin resin modified composition for rotational molded products and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0077] ①. Preparation of heterogeneous nucleating agent powder material

[0078] Accurately weigh 500 nanometer calcium carbonate powder aspect ratio 1 / 6 after drying, 10 parts by weight, main antioxidant 1010 2.0 parts by weight, auxiliary antioxidant 168 2.0 parts by weight, anti-ultraviolet agent 622 2.0 parts by weight, dispersion treatment agent 3.0 parts by weight of calcium stearate is placed in a high-speed mixer, 1.0 parts by weight of surface treatment agent titanate coupling agent NDZ401 is added, and the activation treatment is mixed in a high-speed mixer, the mixing speed is 600 rpm, and the temperature is 60°C. The time is 25 minutes, and the material is discharged to make a heterogeneous nucleating agent powder material, which is set aside;

[0079] ②. Preparation of polyolefin resin modified composition

[0080] Accurately weigh 80 parts by weight of the carrier resin, mix it with the heterogeneous nucleating agent powder material prepared in step ①, extrude a...

preparation Embodiment 2

[0082] ①. Preparation of heterogeneous nucleating agent powder material

[0083] Accurately weigh and dry 1000 nanometer calcium carbonate powder aspect ratio 1 / 20, 20 parts by weight, main antioxidant 1010 0..5 parts by weight, auxiliary antioxidant 168 1.0 parts by weight, anti-ultraviolet agent 622 1..5 Parts by weight, 1.0 parts by weight of the dispersing treatment agent calcium stearate, placed in a high-speed mixer, and 1.0 parts by weight of the surface treatment agent titanate NDZ401 was added. Mix and activate the treatment in a high-speed mixer, the mixing speed is 1250 rpm, the temperature is 60 ° C, the time is 20 minutes, and the material is discharged to make a heterogeneous nucleating agent powder material, which is ready for use;

[0084] ②. Preparation of polyolefin resin modified composition

[0085] Accurately weigh 75 parts by weight of the carrier resin, mix it with the heterogeneous nucleating agent powder material prepared in step ①, extrude and granul...

preparation Embodiment 3

[0087] ①. Preparation of heterogeneous nucleating agent powder material

[0088] Accurately weigh and dry 2000 nanometer calcium carbonate powder aspect ratio 1 / 30, 25 parts by weight, main antioxidant 1010 1.0 parts by weight, auxiliary antioxidant 168 1.0 parts by weight, anti-ultraviolet agent 622 0.5 parts by weight, dispersion treatment agent 1.5 parts by weight of calcium stearate is placed in a high-speed mixer, 1.0 parts by weight of surface treatment agent titanate NDZ401 is added, mixed and activated in a high-speed mixer, the mixing speed is 2500 rpm, the temperature is 60 ° C, and the time is 10 minutes Secondary, the discharge is made into heterogeneous nucleating agent powder material for standby;

[0089] ②. Preparation of polyolefin resin modified composition

[0090] Accurately weigh 70 parts by weight of the carrier resin, mix it with the heterogeneous nucleating agent powder material prepared in step ①, extrude and granulate with a twin-screw extruder, and ...

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Abstract

The invention relates to a special polyolefin resin modified composition for rotational molded products and a preparation method thereof, belonging to compositions of polyolefin homopolymers or copolymers. The special polyolefin resin modified composition is characterized by being prepared from the following raw materials in parts by weight: 50-80 parts of carrier resin, 10-45 parts of heterogeneous nucleating agent, 0.5-2 parts of master antioxidant, 0.5-2 parts of secondary antioxidant, 0.5-2 parts of anti-ultraviolet agent, 0.5-2 parts of surface treating agent and 0.5-3 parts of dispersing agent. The special polyolefin resin modified composition for rotational molded products and the preparation and use methods thereof, provided by the invention, have the advantages that the crystallization rate of a rotational molded product preparation process can be controlled and adjusted, the dimensional stability of the products is improved, and the products are smooth in inside / outside surface, uniform in wall thickness, long in service life and excellent in comprehensive performance and are free from the defects of obvious distortions, pits and bubbles; the deformation of the products can be decreased by 50%, the production time is shortened by over 30%, and the dimensional stability is improved by more than 1 times.

Description

technical field [0001] The invention relates to a special polyolefin resin modified composition for rotationally molded products and a preparation method thereof. Compositions belonging to polyolefin homopolymers or copolymers. Background technique [0002] Polyolefin resin is processed by rotational molding to manufacture various plastic products. Compared with other molding processing methods, it has unique advantages. Plastic products processed by rotomolding are generally complex in shape, uneven in wall thickness, and not completely symmetrical. The cooling rate and shrinkage rate of different parts of the product are difficult to be consistent, and parts with relatively large local planes and large differences in wall thickness are prone to warping. Qu, in order to pursue production efficiency, the production company begins to demould the product at a temperature of 80-90°C or even higher, and then controls the shape change through shaping, so the dimensional change o...

Claims

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Application Information

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IPC IPC(8): C08L23/08C08L23/06C08K13/06C08K9/04C08K3/26C08K3/34C08K3/30C08K3/04C08K3/22B29C47/92B29C48/92
CPCB29C48/92C08K9/04B29C2948/92704C08K3/26C08K2003/265C08K2201/003C08K2201/011C08K2201/016C08L23/06C08L23/0815C08L2205/025C08L2205/24C08L2207/062
Inventor 张广明刘少成裴小静张超徐素兰
Owner CHINA PETROLEUM & CHEM CORP
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