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Application of polymer additive M4228 in preparing copolypropylene tubing

A technology for copolymerizing polypropylene and polypropylene pipes, which is applied in the direction of pipes, rigid pipes, mechanical equipment, etc., which can solve the problems of large thermal expansion coefficient and low notched impact strength, and achieve good mechanical properties, good water extraction resistance, and long service life Improved effect

Active Publication Date: 2011-11-02
DALIAN XINGHUI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the common polypropylene pipe can meet the above advantages, it also has disadvantages: the coefficient of thermal expansion is large at high temperature, and the notched impact strength is not high, etc.
Most of the current PPR and PPB pipes cannot fully meet the above requirements

Method used

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  • Application of polymer additive M4228 in preparing copolypropylene tubing
  • Application of polymer additive M4228 in preparing copolypropylene tubing
  • Application of polymer additive M4228 in preparing copolypropylene tubing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Preparation of polymer additive M4228:

[0026] 1,3,5-trimethyl-2,4,6-tri(3,5-di-tert-butyl-4-hydroxybenzyl)benzene is 35 parts; 3-(1,1-dimethylethyl )-β-[3-(1,1-dimethylethyl)-4-hydroxyphenyl]-4-hydroxy-β-methylbenzoic acid-1,2-ethylene ester is 30 parts; 3 , 20 parts of 9-bis(2,4-dicumylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane; DHT-4A 10 parts of polyethylene wax; 5 parts of polyethylene wax; after mixing and stirring the above components for 30 minutes, under the protection of nitrogen, heat at 1 atmosphere pressure and 180 ° C, stir each component in a molten state for 30 minutes, and cool the obtained product Pass through a 200-mesh sieve after crushing, and collect the part under the sieve to obtain the polymer additive M4228 of the present invention.

Embodiment 2

[0028] The random copolymerization pipe base powder (weight average molecular weight M W : 596000, molecular weight distribution (M W / M N )=4.8, ethylene content (wt%): 3.2) and polymer additive M4228 (prepared by embodiment 1) after fully mixing by the mass ratio of 100:0.7, add twin-screw extruder, with 30-40 tons / The extrusion speed of h is extruded. The reaction temperature of each section of the screw is 200°C, 220°C, 230°C, 250°C, 270°C, 270°C, 270°C, 260°C, 250°C, 230°C.

Embodiment 3

[0030] Block copolymerized pipe base powder (weight average molecular weight M W : 519000, molecular weight distribution (M W / M N )=4.8, ethylene content (wt%): 16.3) and polymer additive M4228 (prepared by embodiment 1) after fully mixing by the mass ratio of 100:0.7, add twin-screw extruder, with 30-40 tons / The extrusion speed of h is extruded. The reaction temperature of each section of the screw is 200°C, 220°C, 230°C, 250°C, 270°C, 270°C, 270°C, 260°C, 250°C, 230°C.

[0031] The pipe material that embodiment 2,3 produce is carried out the test of mechanical property as shown in the following table:

[0032] The contrast of table 1 embodiment 2,3 and the mechanical property of comparative sample

[0033]

[0034]

[0035] Note: Comparative sample 1 is C4220 tube material, and comparative sample 2 is B8101 tube material.

[0036] It can be seen from the above table that the polypropylene pipe material products produced by using this polymer additive M4228 fully...

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Abstract

The invention discloses an application of a polymer additive M4228 in preparing copolypropylene tubing. A dosage of the additive accounts for 0.5% to 1% of the mass of foundation powder of the copolypropylene tubing. The copolypropylene tubing prepared through a method provided in the invention can satisfy mechanical performances required by tubing, bear a comparative inner static pressure, has a good dimensional stability under the pressure, and has a substantially improved service life. In long-term hydraulic strength testing, the service life of the tubing prepared through adding the M4228 is far beyond 50 years in nominal bore at a temperature of 20 DEG C; an oxidation induction period of the tubing prepared by adding the M4228 is more than 80 min; and the hygienic property is improved. The additive M4228 self is nontoxic and odorless, does not influence the product appearance after being added into the tubing, allows the product to have no peculiar smell, and does not get into water to influence the quality of water because the additive M4228 has a good water extraction resistance.

Description

technical field [0001] The invention relates to the fields of chemical engineering and materials, in particular to the application of a polymer additive M4228 in the preparation of copolymerized polypropylene pipes. Background technique [0002] Copolymerized polypropylene pipes are made by copolymerizing propylene and ethylene monomers. According to the difference in polymerization methods, they are divided into two types: random copolymerized polypropylene (PPR) and block copolymerized polypropylene (PPB). The two polypropylene copolymers have different thermodynamic properties and roughly similar mechanical properties at room temperature. Throughout the production process of the pipe material, the production process of the two polypropylene materials includes chemical synthesis and extrusion. The difference between the two tube materials mainly depends on the difference in the chemical synthesis process. [0003] The pipes produced by polypropylene materials have the ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L53/00C08L23/06C08K13/02C08K5/13C08K5/134C08K5/526C08K3/26F16L9/12
Inventor 任国辉
Owner DALIAN XINGHUI CHEM
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