A high-performance concrete piston seal material and its preparation process

A technology for concrete pistons and seals, which is applied in the field of high-performance concrete piston seal materials and preparation technology, and can solve the problems of short service life of concrete piston seals, short service life of concrete pistons, hydrolysis resistance, low temperature resistance and resilience Performance, compressive performance, dynamic fatigue performance, and poor comprehensive performance such as anti-friction performance, etc., to achieve the effects of improving service life, improving hydrolysis resistance, good consistency and stability

Active Publication Date: 2021-11-30
唯万科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It is impossible to achieve good hydrolysis resistance, low temperature resistance, rebound performance, compression resistance, dynamic fatigue performance, and poor comprehensive performance, resulting in short service life of concrete piston seals, and concrete piston products assembled and produced short service life

Method used

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  • A high-performance concrete piston seal material and its preparation process
  • A high-performance concrete piston seal material and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-performance concrete piston sealing material, which is made of the following raw materials in parts by weight: 15-19 parts of 2,4-diphenylmethane diisocyanate, 35-45 parts of polyether-type isocyanate prepolymer, polytetrafluoroethylene 16-24 parts of methylene ether glycol, 14-18 parts of polyoxyethylene polyol, 15-19 parts of ethylene glycol and benzenetriol mixture, 2.5-3.5 parts of antioxidant, 3-5 parts of filler; The mass ratio of ethylene glycol and benzenetriol in the mixture of diol and benzenetriol is 1:0.35-0.5.

[0040] Preferably, the high-performance concrete piston seal material is made of the following raw materials in parts by weight: 17 parts of 2,4-diphenylmethane diisocyanate, 41.5 parts of polyether type isocyanate prepolymer, polytetramethylene 19.5 parts of base ether diols, 16.7 parts of polyoxyethylene polyols, 17.5 parts of ethylene glycol and benzenetriol mixtures, 3.1 parts of antioxidants, 4.6 parts of fillers; The mass ratio of alcoho...

Embodiment 2

[0059] A high-performance concrete piston sealing material, which is made of the following raw materials in parts by weight: 15 parts of 2,4-diphenylmethane diisocyanate, 35 parts of polyether type isocyanate prepolymer, polytetramethylene ether 16 parts of glycols, 14 parts of polyoxyethylene polyols, 15 parts of ethylene glycol and benzenetriol mixtures, 2.5 parts of antioxidants, 3 parts of fillers; The mass ratio is 1:0.35.

[0060] In this embodiment, the polyether type isocyanate prepolymer includes the following raw materials in parts by weight: 35 parts of 2,4-diphenylmethane diisocyanate, 55 parts of polyoxyethylene polyol with a number average molecular weight of 1500, 3 parts of tripropylene glycol diacrylate.

[0061] In the present embodiment, the preparation method of the polyether type isocyanate prepolymer is as follows:

[0062] Add polyoxyethylene polyol and tripropylene glycol diacrylate into the reaction kettle, use 2000rpm high-speed stirring and vacuumi...

Embodiment 3

[0078] A high-performance concrete piston sealing material, which is made of the following raw materials in parts by weight: 19 parts of 2,4-diphenylmethane diisocyanate, 45 parts of polyether type isocyanate prepolymer, polytetramethylene ether 24 parts of glycols, 18 parts of polyoxyethylene polyols, 19 parts of ethylene glycol and benzenetriol mixtures, 3.5 parts of antioxidants, 5 parts of fillers; The mass ratio is 1:0.5.

[0079] In this embodiment, the polyether type isocyanate prepolymer includes the following raw materials in parts by weight: 45 parts of 2,4-diphenylmethane diisocyanate, 65 parts of polyoxyethylene polyol with a number average molecular weight of 3000, 5 parts of tripropylene glycol diacrylate.

[0080] In the present embodiment, the preparation method of the polyether type isocyanate prepolymer is as follows:

[0081] Add polyoxyethylene polyol and tripropylene glycol diacrylate into the reaction kettle, stir at a high speed of 3000rpm and vacuumiz...

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Abstract

The invention discloses a high-performance concrete piston sealing material, which is made of the following raw materials in parts by weight: 15-19 parts of 2,4-diphenylmethane diisocyanate, 35-45 parts of polyether type isocyanate prepolymer 16-24 parts of polytetramethylene ether glycol, 14-18 parts of polyoxyethylene polyol, 15-19 parts of ethylene glycol and benzenetriol mixture, 2.5-3.5 parts of antioxidant, 3-5 parts of filler ; The mass ratio of ethylene glycol and benzenetriol in the mixture of ethylene glycol and benzenetriol is 1:0.35-0.5. The hydrolysis resistance, wear resistance, rebound performance, dynamic fatigue performance, etc. of the high-performance concrete piston seal of the present invention have been greatly improved. Under the same working conditions, the service life of the high-performance concrete piston seal of the present invention It is more than 1.5 times that of the existing products. The high-performance concrete piston seal of the present invention not only has excellent performance, but also has good consistency and stability in product quality.

Description

technical field [0001] The invention relates to the field of sealing material for concrete pistons, in particular to a high-performance sealing material for concrete pistons and a preparation process. Background technique [0002] The concrete piston of the concrete pump truck is a vulnerable part. The existing concrete piston (of) seal material in the domestic market is polyurethane based on TDI system (isocyanate adopts TDI, such as TDI-100 or TDI-100 and TDI-80 mixed, polyol adopts polyester or polycaprolactone) , This kind of concrete piston has poor hydrolysis resistance, poor wear resistance and poor resilience performance, so the product life is not high. [0003] For example, the State Intellectual Property Office disclosed a utility model with the publication number CN203979371U named "a high-pressure concrete piston seal" on 2014.12.03. The utility model discloses a high-pressure concrete piston seal, including a rubber body and the skeleton, the skeleton is comb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/32
CPCC08G18/3206C08G18/3215C08G18/4804C08G18/4854C08G18/7671
Inventor 董小红
Owner 唯万科技有限公司
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