Nano whisker modified resin dedicated to PP-R tube and its preparation method

A nano-whisker and PP-R technology, which is applied in the field of cold and hot water pipe materials for construction, can solve the problems of unsatisfactory mechanical properties, poor heat resistance, and difficulty in hot fluid transportation.

Inactive Publication Date: 2006-11-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, PP-R still has the problem of poor heat resistance, and its mechanical properties are not ideal.
Patent 01129106.0 compounded polypropylen...

Method used

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  • Nano whisker modified resin dedicated to PP-R tube and its preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Ordinary PP-R resin (melt flow rate is 0.30g / 10min) 96.5%

[0034] Modified Nano Calcium Carbonate Whiskers 2%

[0035] Rutile Nano Titanium Dioxide (d 50 =20nm) 1%

[0036] Polyacrylamide 0.5%

[0037] Wherein the modified nano-calcium carbonate whisker is modified by a silane coupling agent, the length of the nano-calcium carbonate whisker used is 0.5 μm, and the diameter is 10-50 nm.

[0038] The modified nano-whiskers, rutile nano-titanium dioxide, PP-R resin and dispersant are uniformly pre-mixed in a high-speed mixer; the solid mixture is fully blended and smelted in a molten state; the blended and smelted material is extruded with a screw , Granulation.

Embodiment 2

[0040] Ordinary PP-R resin (melt flow rate is 0.30g / 10min) 95%

[0041] Modified Nano Calcium Carbonate Whiskers 3%

[0042] Modified nano zinc oxide whisker 0.5%

[0043] Rutile Nano Titanium Dioxide (d 50 =20nm) 1%

[0044] Polyacrylamide 0.5%

[0045] Wherein the modified nano-calcium carbonate whisker is modified by a silane coupling agent, the length of the nano-calcium carbonate whisker used is 2 μm, and the diameter is 10-50 nm.

[0046] The modified nano-zinc oxide whiskers used are modified by KH560 coupling agent, and the nano-zinc oxide whiskers used are in the shape of three-dimensional four needles, the center body diameter of the whiskers is 300nm, and the length of the needles is 15 μm.

[0047] The modified nano-whiskers, PP-R resin and dispersant are uniformly pre-mixed in a high-speed mixer; the solid mixture is fully blended and smelted in a molten state; the blended and smelted material is extruded and granulated by a screw.

[0048] Schedule 1:

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Abstract

The invention discloses a preparing method of heat resistance, fracture extensibility and anti-bending improving PP-R pipe, which is characterized by the following: adopting random copolymerization polypropylene (PP-R) as basic material; combining 2-100 um length, 10-400 nm diameter nanometer whisker with common PP-R resin modified by coupling agent; dispersing the nanometer whisker better to improve thermals and mechanics property for PP-R resin; making the resin possess better anti-aging property, bacterial inhibition and microorganism resistance.

Description

1. Technical field [0001] The invention relates to the technical field of plastic pipe materials for construction, in particular to cold and hot water pipe materials for construction with random copolymerized polypropylene (PP-R) as the main material 2. Technical background [0002] PP-R pipe is a newly developed construction pipe in the history of international pipe development. It has excellent high pressure resistance and high and low temperature resistance. It has developed rapidly abroad, especially in the application of water supply pipes, which has surpassed aluminum-plastic composite pipes. [0003] PP-R material has good heat resistance, and its Vicat softening point is 131.5°C. The maximum operating temperature of the plastic pipe processed with PP-R resin can reach 95°C, and the long-term (50-year 1.0Mpa) operating temperature can generally reach 70°C, which can fully meet the water delivery requirements under general conditions. However, in some special cases (...

Claims

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Application Information

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IPC IPC(8): C08L23/14B29B9/12B29C47/00C08K7/08
Inventor 张云邹敏
Owner SICHUAN UNIV
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