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PP-R/PBT alloy material and preparation method and application thereof

A technology of PP-R and alloy materials, applied in application, chemical instruments and methods, heating methods, etc., can solve the problems of twisting and deformation of water pipes, insufficient dimensional stability, poor creep resistance and rigidity of PP-R pipes, etc. , to achieve the effect of improving the pressure resistance, good mechanical properties and dimensional stability, and low linear expansion coefficient

Pending Publication Date: 2022-04-26
RIFENG ENTERPRISE GRP CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the poor creep resistance and rigidity of PP-R pipes and insufficient dimensional stability, the water pipes are prone to twisting and deformation when delivering hot water, which affects the use

Method used

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  • PP-R/PBT alloy material and preparation method and application thereof
  • PP-R/PBT alloy material and preparation method and application thereof
  • PP-R/PBT alloy material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9

[0039] Embodiments 1 to 9 provide a PP-R / PBT alloy material, which is made from the formula in Table 1, and the preparation method is as follows:

[0040] (1) Add the glass microspheres and the silane coupling agent into the mixer, and mix them uniformly at a speed of 50 to 85 rpm to obtain activated glass microspheres;

[0041] (2) In addition to the glass fiber, add the remaining components in the formula and the activated glass microspheres prepared in step (1) into the mixer, and mix for 5 minutes at 100-150 rpm to obtain a uniform mixture;

[0042] (3) Put the mixture into the twin-screw extruder, control the extrusion temperature to 190-230°C, and the screw speed to 200-500rpm. After the mixture is in a molten state, add glass fiber to the middle section of the extruder for blending. Extruding, drawing and granulating to obtain the PP-R / PBT alloy material.

[0043] Table 1

[0044]

[0045] Comparative Examples 1-4 provide a PP-R / PBT alloy material, which is prepare...

Embodiment 10

[0059] Embodiment 10 provides a composite pipe, such as figure 1 As shown, the composite pipe is a three-layer composite structure, followed by PP-R outer layer 1, PP-R / PBT middle layer 2 and PP-R inner layer 3, PP-R outer layer, PP-R / PBT middle layer The wall thickness ratio of the PP-R inner layer is 1:1:1.3.

[0060] The PP-R outer layer and the PP-R inner layer are respectively made of PP-R resin, and the PP-R / PBT middle layer is made of the PP-R / PBT alloy material of Example 1. The composite pipe is made by a conventional three-layer co-extrusion method, and will not be repeated here.

Embodiment 11

[0062] Embodiment 11 provides a kind of composite pipe, and its difference with embodiment 10 is only: the PP-R / PBT intermediate layer of embodiment 11 is made of the PP-R / PBT alloy material of embodiment 2, other and embodiment 10 is the same.

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Abstract

The invention discloses a PP-R / PBT alloy material and a preparation method and application thereof, and belongs to the technical field of polymer alloy materials. The PP-R / PBT alloy material is prepared from the following components in parts by weight: 40 to 60 parts of PP-R, 5 to 15 parts of PBT, 3 to 10 parts of compatilizer, 0.1 to 1 part of chain extension modifier, 15 to 30 parts of glass fiber, 5 to 15 parts of glass beads, 0.1 to 1 part of silane coupling agent, 0.2 to 0.5 part of nucleating agent and 0.5 to 5 parts of lubricant. The PP-R / PBT alloy material provided by the invention has relatively good mechanical properties and dimensional stability and low linear expansion coefficient, and can be used as a middle layer in a PP-R pipe, so that the distortion resistance of the pipe can be effectively improved, the linear expansion coefficient of the pipe can be reduced, and the pressure resistance of the pipe can be improved.

Description

technical field [0001] The invention belongs to the technical field of polymer alloy materials, and in particular relates to a PP-R / PBT alloy material and its preparation method and application. Background technique [0002] Random copolymerized polypropylene (PP-R), also known as three-type polypropylene, has good heat resistance and corrosion resistance because the random distribution of comonomers in the polypropylene chain changes the molecular structure of polypropylene. It has the advantages of long service life and easy processing. The performance of the pipe made of it is stable, and the maximum service temperature can reach 95°C. It has been widely used in cold and hot water pipes. [0003] However, due to the poor creep resistance and rigidity of PP-R pipes and insufficient dimensional stability, the water pipes are prone to twisting and deformation when transporting hot water, which affects the use. Contents of the invention [0004] In order to solve the defic...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L67/02C08L51/06C08K5/09C08K7/14C08K7/28C08K9/06C08K3/26C08K13/06B32B27/32B32B27/36B32B27/06B32B1/08F24D3/02F16L9/12
CPCC08L23/14B32B27/32B32B27/36B32B27/08B32B1/08F24D3/02F16L9/121C08K2003/265C08K2201/011C08L2201/08C08L2203/18B32B2250/24B32B2307/544B32B2307/734B32B2597/00C08L67/02C08L51/06C08K5/09C08K7/14C08K7/28C08K9/06C08K3/26C08K13/06
Inventor 汪利汪磊吕爱龙
Owner RIFENG ENTERPRISE GRP CO LTD
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