HDPE pipe and preparation method thereof

A pipe and pipe blank technology, which is applied in the field of HDPE pipe and its preparation, can solve the problems such as the difficulty of taking into account various indicators of mechanical strength, achieve good market prospects, improve flexibility, and make up for market vacancies

Inactive Publication Date: 2020-09-18
长沙三思新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a HDPE pipe and its preparation method to solve the technical problem that it is difficult to take into account the various indicators of mechanical strength

Method used

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  • HDPE pipe and preparation method thereof
  • HDPE pipe and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of HDPE pipes, first put HDPE resin in a polymer pipe rotary extrusion device for melt and rotary extrusion, and the extruded pipe blanks are cooled and sized under traction to obtain the HDPE pipe ; Wherein, in parts by weight, HDPE resin is prepared by the following method:

[0031] (1) First add 1 part of catalyst, 5 parts of n-hexane and 1 part of n-heptane into the polymerization kettle, and raise the temperature of the polymerization kettle to 60°C;

[0032] (2) Then feed 0.1 part of vinyl fluoride, 0.8 part of 1-octene, 1 part of hydrogen and 100 parts of ethylene, react at 83°C and 0.5MPa for 3 hours, cool down to normal temperature, discharge, and dry to obtain a resin matrix;

[0033] (3) Finally, the resin matrix and the filler are melt-blended to obtain HDPE resin;

[0034] The catalyst is obtained by mixing vanadium-modified SBA-15 molecular sieve with titanium tetrachloride and butyl titanate; the filler is obtained by grafting graphe...

Embodiment 2

[0047] A preparation method of HDPE pipes, first put HDPE resin in a polymer pipe rotary extrusion device for melt and rotary extrusion, and the extruded pipe blanks are cooled and sized under traction to obtain the HDPE pipe ; Wherein, in parts by weight, HDPE resin is prepared by the following method:

[0048] (1) First add 2 parts of catalyst, 3 parts of n-hexane and 2 parts of n-heptane into the polymerization kettle, and raise the temperature of the polymerization kettle to 50°C;

[0049] (2) Then feed 0.2 parts of vinyl fluoride, 0.5 parts of 1-octene, 2 parts of hydrogen and 100 parts of ethylene, react at 80°C and 0.8MPa for 2 hours, cool down to normal temperature, discharge, and dry to obtain a resin matrix;

[0050] (3) Finally, the resin matrix and the filler are melt-blended to obtain HDPE resin;

[0051] The catalyst is obtained by mixing vanadium-modified SBA-15 molecular sieve with titanium tetrachloride and butyl titanate; the filler is obtained by grafting g...

Embodiment 3

[0064] A preparation method of HDPE pipes, first put HDPE resin in a polymer pipe rotary extrusion device for melt and rotary extrusion, and the extruded pipe blanks are cooled and sized under traction to obtain the HDPE pipe ; Wherein, in parts by weight, HDPE resin is prepared by the following method:

[0065] (1) First add 1.5 parts of catalyst, 4 parts of n-hexane and 1.5 parts of n-heptane into the polymerization kettle, and raise the temperature of the polymerization kettle to 55°C;

[0066] (2) Then feed 0.15 parts of vinyl fluoride, 0.6 parts of 1-octene, 1.5 parts of hydrogen and 100 parts of ethylene, react at 82°C and 0.7 MPa for 2.5 hours, cool down to normal temperature, discharge, and dry to obtain a resin matrix;

[0067] (3) Finally, the resin matrix and the filler are melt-blended to obtain HDPE resin;

[0068] The catalyst is obtained by mixing vanadium-modified SBA-15 molecular sieve with titanium tetrachloride and butyl titanate; the filler is obtained by ...

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Abstract

The invention provides an HDPE pipe and a preparation method thereof. The preparation method comprises the following steps: firstly, mixing and reacting a vanadium-modified SBA-15 molecular sieve withtitanium tetrachloride and butyl titanate to prepare a catalyst; grafting graphene with polyglutamic acid to obtain a filler; then, under the action of a catalyst, carrying out a polymerization reaction on vinyl fluoride, 1-octene, hydrogen, ethylene and the like used as raw materials to obtain a resin matrix; and finally, carrying out melt blending on the resin matrix and filler to obtain the HDPE resin. On the premise that other mechanical strength indexes are not affected, the flexibility of the HDPE resin can be greatly improved, market vacancy is made up, and the HDPE resin has good market prospects.

Description

technical field [0001] The invention relates to the technical field of plastic pipes, in particular to an HDPE pipe and a preparation method thereof. Background technique [0002] HDPE (High Density Polyethylene) is a highly crystalline, non-polar thermoplastic resin. The appearance of the original HDPE is milky white, and the thin section is translucent to a certain extent. PE has excellent resistance to most domestic and industrial chemicals. Certain classes of chemicals can cause chemical corrosion, such as corrosive oxidizers (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride). The polymer is non-hygroscopic and has good water vapor resistance for packaging purposes. HDPE has good electrical properties, especially the high dielectric strength of the insulation, making it very suitable for wires and cables. Medium to high molecular weight grades have excellent impact resistance at room temperature or even down...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/08C08L87/00C08F210/16C08F210/14C08F214/20C08F2/00C08F2/14C08F4/685
CPCC08F210/16C08L23/0892C08L2203/18C08L2207/062C08F210/14C08F214/20C08F2/00C08F2/14C08F4/685C08L87/005
Inventor 唐荣林
Owner 长沙三思新材料科技有限公司
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