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Enhanced polyolefin rotational moulding composition and preparation method thereof

A composition and polyolefin technology, applied in the field of rotomolding materials, can solve the problems of complex process, high equipment cost, unfavorable implementation, etc., and achieve the effect of simple process, reasonable combination and convenient implementation

Active Publication Date: 2014-09-24
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented process is complicated, and the equipment cost is relatively high, which is not conducive to implementation

Method used

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  • Enhanced polyolefin rotational moulding composition and preparation method thereof

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Experimental program
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Effect test

Embodiment 5

[0038] Reinforced polyolefin rotomolding composition of the present invention, its mass percentage is composed of:

[0039] LLDPE resin 60%, LLDPE resin is a copolymer of ethylene and 1-butene, its MFR is 13g / min, and its density is 0.930g / cm 3 ;

[0040] HDPE resin 15%, HDPE resin is a copolymer of ethylene and 1-butene, its MFR is 13g / min, and its density is 0.950g / cm 3 ;

[0041] 20% glass fiber, the length of glass fiber is 0.2-5mm, the glass fiber is alkali-free glass fiber, and its surface is treated with silane coupling agent;

[0042] PE-g-MAH5%, PE-g-MAH is maleic anhydride grafted PE resin, and its graft ratio is 0.8%.

[0043] The preparation method of the reinforced polyolefin rotomolding composition of the present invention comprises: mixing the batching components with a high-speed mixer for 5 minutes, adopting a twin-screw extruder to melt, blend and granulate, and setting the temperature of each section of the extruder to 160°C, and then The prepared pellet...

Embodiment 6

[0046] Reinforced polyolefin rotomolding composition of the present invention, its mass percentage is composed of:

[0047] LLDPE resin 80%, LLDPE resin is a copolymer of ethylene and 1-hexene, its MFR is 12g / min, and its density is 0.920g / cm 3 ;

[0048] HDPE resin 5%, HDPE resin is a copolymer of ethylene and 1-hexene, its MFR is 10g / min, and its density is 0.965g / cm 3 ;

[0049] 10% glass fiber, the length of glass fiber is 0.6-4mm, the glass fiber is low-alkali glass fiber, and its surface is treated with silane coupling agent;

[0050] PE-g-MAH 5%, PE-g-MAH is maleic anhydride grafted PE resin, and its graft ratio is 1.5%.

[0051] The preparation method of the reinforced polyolefin rotomoulding composition of the present invention comprises: mixing the batching components with a high-speed mixer for 4 minutes, adopting a twin-screw extruder to melt, blend and granulate, and setting the temperature of each section of the extruder to 150°C, and then The prepared pellet...

Embodiment 7

[0054] Reinforced polyolefin rotomolding composition of the present invention, its mass percentage is composed of:

[0055] LLDPE resin 75%, LLDPE resin is a copolymer of ethylene and 1-butene, its MFR is 8g / min, and its density is 0.920g / cm 3 ;

[0056] HDPE resin 10%, HDPE resin is a copolymer of ethylene and 1-hexene, its MFR is 11g / min, and its density is 0.945g / cm 3 ;

[0057] 15% glass fiber, the length of the glass fiber is 0.2-6 mm, the glass fiber is alkali-free glass fiber, and its surface is treated with a titanate coupling agent.

[0058]The preparation method of the reinforced polyolefin rotomolding composition of the present invention comprises: mixing the batching components with a high-speed mixer for 5 minutes, using a twin-screw extruder to melt, blend and granulate, and setting the temperature of each section of the extruder to 180°C, and then The prepared pellets are milled.

[0059] Another preparation method of the reinforced polyolefin rotomolding co...

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Abstract

The invention relates to an enhanced polyolefin rotational moulding composition and a preparation method thereof. The composition comprises, by weight, 50-94% of LLDPE resin, 5-20% of HDPE resin, 1-20% of glass fibre and 0-10% of PE-g-MAH. The ingredients are mixed by a high speed mixer for 3-5 min and treated with melt blending granulation by a double screw extruder with temperature of each segment set at 130-200 DEG C; then the prepared pellet is milled into powder. A product prepared by the composition has good rigidity and good toughness; and a preparation method is simple and convenient for enforcement.

Description

technical field [0001] The invention relates to a reinforced polyolefin rotational molding composition and a preparation method thereof, belonging to the technical field of rotational molding materials. Background technique [0002] Rotational molding, also known as rotational molding or rotary molding, is a plastic molding technology with a long history. The rotational molding process is to add plastic powder into the mold, then heat the mold and make it rotate continuously along two mutually perpendicular axes, and the resin in the mold is gradually and evenly coated and melted and adhered to the inner surface of the mold under the action of gravity and heat , to form the desired shape. Then the mold is cooled, and the product is demolded. [0003] At present, the rolling plastic used by most domestic manufacturers is LLDPE resin. The physical properties of LLDPE determine that it cannot meet the production of some products that require rigidity or some large and super l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/08C08L51/06C08K9/06C08K9/04C08K7/14
Inventor 刘少成张超张广明张丽霞唐岩苑东兴裴晓静
Owner CHINA PETROLEUM & CHEM CORP