High heat-durable resin dedicated to PP-R tube and its preparation method

A high heat resistance, PP-R technology, applied in the field of cold and hot water pipe materials for construction, can solve the problems of poor heat resistance and unsatisfactory mechanical properties, and achieve the effect of strong heat insulation performance

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

[0005] PP-R mainly has the problem of poor heat resistance during use. In some special cases (such as the transportation of hot water and heating in the northern region in winter), when the temperature of the transmission medium exceeds 100 ° C, it must be PP-R material is modified to improve its heat resistance in order to meet the requirements of use
In addition, its mechanical properties are not ideal

Method used

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  • High heat-durable resin dedicated to PP-R tube and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Ordinary PP-R resin (melt flow rate is 0.30g / 10min) 93%

[0036] Modified Nano Calcium Carbonate Whiskers 2.5%

[0037] Layered Mica 3%

[0038] Rutile Nano Titanium Dioxide (d 50 =20nm) 1%

[0039] Polyacrylamide 0.5%

[0040] The modified nano-calcium carbonate whiskers used are modified by a silane coupling agent, the length of the nano-calcium carbonate whiskers used is 0.5 μm, and the diameter is 10-50 nm; the particle size of the layered mica is 600 mesh, and the diameter-thickness ratio is 6. : 1.

[0041] The layered mica, modified nano-calcium carbonate 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; after blending and smelting The material is extruded and granulated with a screw.

Embodiment 2

[0043] Ordinary PP-R resin (melt flow rate: 0.35g / 10min) 91%

[0044] Modified Nano Zinc Oxide Whiskers 2.5%

[0045] Layered Mica 4%

[0046] Rutile Nano Titanium Dioxide (d 50 =40nm) 2%

[0047] Polyacrylamide 0.5%

[0048] Wherein the granularity of layered mica used is 800 orders, and diameter-thickness ratio is 6: 1; Modified nano-zinc oxide whisker is modified through KH560 coupling agent, and used nano-zinc oxide whisker is three-dimensional four-needle shape, and the whisker's The diameter of the centrosome is 300nm, and the length of the needle is 15μm.

[0049] The layered mica, modified nano-zinc oxide 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; after blending and smelting The material is extruded and granulated with a screw.

[0050] Schedule 1:

[0051]

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Abstract

The invention discloses a making method of nanometer whisker and inorganic nanometer particle compound, which is characterized by the following: adapting random copolymerization polypropylene (PP-R) as base material; improving the heat-durability for PP-R pipe specific resin and breakage extension rate and anti-bent strength through layer-shaped mica and modified nanometer whisker and inorganic nanometer particle compound; forming hollow network structure for nanometer whisker in the base; making the layer-shaped mica compound with plug-layer; combining distribution property of nanometer dimension for zero-dimension nanometer particle in the base with layer-shaped mica to improve heat property and mechanic property of PP-R pipe resin.

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. [0004] At present, PP-R pipe m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14B29B9/12B29C47/00C08K7/02
Inventor 张云邹敏
Owner SICHUAN UNIV
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