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A kind of block copolymerization polypropylene composite additive

A compound additive and block copolymerization technology, applied in the field of plastic additives, can solve the problem of no substitutes, etc., and achieve the effect of improving surface gloss, high impact resistance and improving mechanical properties

Inactive Publication Date: 2016-01-20
广州赫尔普化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the lack of supply of random copolymerized polypropylene in China at present, it is necessary to find substitutes with similar properties and functions, but there is still no ideal substitute.

Method used

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  • A kind of block copolymerization polypropylene composite additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] 20 parts of antioxidant B215, 5 parts of fluororubber processing aid, 10 parts of oxidized polyethylene wax, 30 parts of long-acting antioxidant 1330, 10 parts of beta nucleating agent, 5 parts of white carbon black, 15 parts of stearic acid Calcium and 5 parts of ultra-fine talc powder are proportioned and then heated and stirred in the reactor at a heating temperature of 140±5°C. After melting, extrude and cool to granulate.

[0015] Add 0.85% of the above granulated material to the block polypropylene powder, mix, melt, extrude, pelletize, and cool to form the cold and hot water block polypropylene pipe material, and then color match (optional), After melting, it is extruded through a mold, cooled and shaped into a cold and hot water PPB pipe.

[0016] The auxiliary agent formula in this example is suitable for petrochemical enterprises. The auxiliary agent of the present invention is added in the granulation process of the polymerization device. After the addition, ...

Embodiment 2

[0018] 25 parts of antioxidant B225, 5 parts of fluororubber processing aid, 5 parts of oxidized polyethylene wax processing aid, 30 parts of long-acting antioxidant 1330, 10 parts of β nucleating agent, 5 parts of white carbon black, 10 parts Sodium benzoate and 10 parts of ultra-fine talc powder are mixed in proportion and then heated and stirred in the reaction kettle at a heating temperature of 140±5°C. After melting, extrude and cool to granulate.

[0019] Add 0.8% of the above granulated material to the block polypropylene pellets, mix, melt, extrude, pelletize, and cool to form the cold and hot water block polypropylene pipe material, and then color match (optional), After melting, it is extruded through a mold, cooled and shaped into a cold and hot water PPB pipe.

[0020] The auxiliary agent formula of this example is suitable for large-scale pipe production enterprises and modified plastic production enterprises. The ordinary block copolymerized polypropylene pellets...

Embodiment 3

[0022] With 10 parts of antioxidant B215, 5 parts of fluororubber processing aids, 20 parts of long-acting antioxidant 1010, 20 parts of long-lasting antioxidant 1330, 10 parts of sorbitol nucleating agent, 5 parts of white carbon black, 10 parts 10 parts of sodium benzoate, 10 parts of superfine talc powder, and 10 parts of zinc stearate are mixed according to the regulations and heated and stirred in the reactor at a heating temperature of 150±5°C. After melting, extrude and cool to granulate.

[0023] Add 0.85% of the above granulated material to the block polypropylene pellets, mix, melt, extrude, pelletize, and cool to form the cold and hot water block polypropylene pipe material, and then color match (optional), After melting, it is extruded through a mold, cooled and shaped into a cold and hot water PPB pipe.

[0024] The auxiliary agent formula in this example is suitable for general pipe production enterprises and modified plastic production enterprises. The ordinary ...

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Abstract

The invention discloses a compound additive for a PPB. The compound additive is used for improving performances of the PPB, so that the PPB can replace a polypropylene random copolymer (PPR) for production of cold and hot water pipes and chemical pipes. The dedicated additive is a granular mixture produced by melting and granulating and comprises, by weight, 5-10 parts of processing agents, 20-40 parts of long-acting antioxidants, 10-30 parts of antioxidants, 10-20 parts of nucleating agents, 10-30 parts of stearate, 5-20 parts of ultra-fine talc powder and the like. The heat-resistant performance, the flowing performance, the shock resistance, the ageing resistance, the processability, the creep resistance and the like of the PPB can be improved through the additive.

Description

technical field [0001] The invention belongs to the technical field of plastic additives, in particular to a special additive for block copolymerized polypropylene resin. Background technique [0002] Polypropylene hot and cold water pipes are generally produced using random copolymerized polypropylene (PPR for short), which has excellent impact resistance and pressure resistance, and the most suitable temperature for use is 10-70°C. Since the 1990s, China's PPR market has grown rapidly However, due to the serious shortage of PPR output and high price, a large number of manufacturers use ordinary polypropylene instead of PPR. The notched impact strength of its products is extremely low, the impact resistance is poor, the thermal expansion coefficient is large, the creep is obvious, and the UV resistance is poor, etc. . There are many reports on the modification of random copolymerized polypropylene with nucleating agents and processing aids. Chinese patent 200710030726.X di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L27/20C08L23/08C08K5/098C08K3/34C08K5/526C08K5/13
Inventor 吴俊杰张官云
Owner 广州赫尔普化工有限公司
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