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
CN110256653BActive Publication Date: 2021-11-30唯万科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
唯万科技有限公司
Publication Date
2021-11-30

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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.
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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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