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Silicone sealant for asphalt road joints and preparation method thereof

A silicone sealant, road technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems of low adhesion, affect the application of silicone, poor adhesion, etc., and achieve good adhesion. , the effect of promoting widespread use and ensuring safety

Inactive Publication Date: 2015-03-25
GUANGZHOU HUINA NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicone sealant used in the prior art has poor compatibility with asphalt materials, and the adhesion is very low, which is difficult to meet the needs of joint sealing of asphalt pavement, thus greatly affecting the application of silicone rubber on asphalt pavement
In addition, the currently used silicone sealant has low tear strength and high modulus, which makes its bonding performance poor after water immersion, heat treatment, cold drawing and hot pressing. It is prone to adhesive failure or even colloidal cracking, which further affects and limits its application in road joint construction

Method used

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  • Silicone sealant for asphalt road joints and preparation method thereof
  • Silicone sealant for asphalt road joints and preparation method thereof
  • Silicone sealant for asphalt road joints and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1. A kind of silicone sealant for asphalt road joints of the present embodiment is composed of raw materials according to parts by weight:

[0018]

[0019] *The cross-linking agent is: the mixture of phenyltributanone oximinosilane: vinyltributanone oximosilane=1:3 by weight;

[0020] **Coupling agent is: a mixture of isocyanatopropyltriethoxysilane:γ-mercaptopropyltrimethoxysilane=1:10 by weight.

[0021] 2. The preparation method of a silicone sealant for asphalt road joints in this embodiment is as follows: the above-mentioned raw materials are each composed, under the vacuum degree of -0.07Mpa and the stirring speed of 5Hz, stirring and mixing for 40min, discharging and filling to obtain the product .

Embodiment 2

[0023] 1. A kind of silicone sealant for asphalt road joints of the present embodiment is composed of raw materials according to parts by weight:

[0024]

[0025]

[0026] *Coupling agent is: a mixture of -methacryloyloxypropyltrimethoxysilane:N-(β-aminoethyl)-Y-aminopropyltrimethoxysilane=1:3 by weight.

[0027] 2. The preparation method of a silicone sealant for asphalt road joints in this embodiment is as follows: the above-mentioned raw materials are each composed, under vacuum degree -0.08Mpa, stirring speed 10Hz, stirring and mixing for 45min, discharging and filling to obtain the product .

Embodiment 3

[0029] 1. A kind of silicone sealant for asphalt road joints of the present embodiment is composed of raw materials according to parts by weight:

[0030]

[0031] 2. The preparation method of a silicone sealant for asphalt road joints in this embodiment is as follows: the above-mentioned raw materials are composed of each component, under the vacuum degree of -0.09Mpa and the stirring speed of 20Hz, stirring and mixing for 50min, discharging and filling to obtain the product .

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Abstract

The invention discloses a silicone sealant for asphalt road joints. The silicone sealant for asphalt road joints is prepared from the following raw materials in parts by weight: 90-130 parts of alpha, omega-dihydroxyl polydimethylsiloxane, 50-130 parts of calcium carbonate, 10-50 parts of oil absorption material, 1-30 parts of fumed silica, 5-30 parts of methylsilicone oil, 5-30 parts of cross-linking agent, 0.5-5 parts of coupling agent and 0.01-1 parts of catalyst. The invention further discloses a preparation method of the silicone sealant for asphalt road joints. The silicone sealant disclosed by the invention has excellent weather fastness and ageing resistance, low tensile modulus, and good adhesion performance, solves the problems of adhesion cracking occurring after immersion, heat treatment, and cold-drawing hot-pressing of the silicone sealant for the existing road surface joints in the prior art, and is beneficial to promoting the wide use of the silicone sealant in the field of road sealing, thus the safety of roads can be effectively guaranteed and improved.

Description

technical field [0001] The invention relates to the technical field of polymer sealing materials, in particular to a silicone sealant for asphalt road joints and a preparation method thereof. Background technique [0002] Asphalt pavement needs to use a certain proportion of asphalt in the construction. Asphalt is a product in the process of crude oil processing. It is a brown-black organic gelatinous substance, which is a black or dark-brown viscous liquid or solid at room temperature. As a road pavement joint sealing material, silicone sealant has good advantages in application due to its excellent weathering resistance, ultraviolet aging resistance and elastic recovery performance. However, the silicone sealant used in the prior art has poor compatibility with asphalt materials, and has a very low adhesive force, which is difficult to meet the use requirements of asphalt pavement joint sealing, thus greatly affecting the application of silicone on asphalt pavement. . I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09K3/10
Inventor 李大卿廖帮伟黄剑文黄坚林鸿李彬诚
Owner GUANGZHOU HUINA NEW MATERIAL TECH
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