One-component silicone sealant for concrete road joints and preparation method thereof

A silicone sealant, concrete road technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve problems such as bonding cracking, poor compatibility of polyurethane sealants, low tensile modulus, etc., to achieve Good adhesion, promotes widespread use, low tensile modulus effect

Active Publication Date: 2017-12-19
GUANGZHOU HUINA NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a single-component silicone sealant for concrete road joints with excellent weather resistance, aging resistance, low tensile modulus and good bonding performance, to Solve the problem of bonding cracking after water immersion, heat treatment, cold drawing and hot pressing of silicone sealants for road joints at present, and the problem of poor compatibility with polyurethane sealants

Method used

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  • One-component silicone sealant for concrete road joints and preparation method thereof
  • One-component silicone sealant for concrete road joints and preparation method thereof
  • One-component silicone sealant for concrete road joints and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. A kind of single-component silicone sealant for concrete road joints in this embodiment, its raw materials are composed of:

[0019]

[0020] *The cross-linking agent is: a mixture of phenyl tributylketoxime silane:vinyl tributylketoxime silane=1:3 by weight;

[0021] **The coupling agent is: a mixture of isocyanatopropyltriethoxysilane:γ-mercaptopropyltrimethoxysilane=1:10 by weight.

[0022] 2. The preparation method of a single-component silicone sealant for concrete road joints in this embodiment is as follows: mix the above-mentioned raw materials for 40 minutes at a vacuum degree of -0.07Mpa and a stirring speed of 15 Hz, discharge and fill Instant product.

Embodiment 2

[0024] 1. A kind of single-component silicone sealant for concrete road joints in this embodiment, its raw materials are composed of:

[0025]

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

[0027] 2. The preparation method of a one-component silicone sealant for concrete road joints in this embodiment is as follows: mix the above raw materials for 45 minutes at a vacuum degree of -0.08Mpa and a stirring speed of 10 Hz, discharge and fill Instant product.

Embodiment 3

[0029] 1. A kind of single-component silicone sealant for concrete road joints in this embodiment, its raw materials are composed of:

[0030]

[0031] 2. The preparation method of a single-component silicone sealant for concrete road joints in this embodiment is as follows: mix the above-mentioned raw materials for 50 minutes at a vacuum degree of -0.09Mpa and a stirring speed of 20 Hz, discharge and fill Instant product.

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Abstract

The invention discloses a single-component silicone sealant for concrete road seaming, which is prepared from the following raw materials in parts by weight: 90-130 parts of alpha,omega-dihydroxy polydimethylsiloxane, 50-130 parts of calcium carbonate, 1-30 parts of vapor-phase silicon dioxide, 5-30 parts of methyl silicone oil, 5-30 parts of crosslinking agent, 0.5-5 parts of coupling agent and 0.01-1 part of catalyst. The invention also discloses a preparation method of the single-component silicone sealant for concrete road seaming. The method solves the problem of bonding cracking after water soaking, heat treatment, cold drawing and hot rolling in the silicone sealant for road seaming in the prior art and the problem of poor compatibility in the polyurethane sealant, and can promote the wide application of the silicone sealant in the field of road sealing, thereby effectively ensuring and enhancing the road safety.

Description

technical field [0001] The invention relates to the technical field of polymer sealing materials, in particular to a one-component silicone sealant for concrete road joints and a preparation method thereof. Background technique [0002] At present, the sealing materials used in the construction of concrete road joints in the prior art include polyurethane glue, polysulfide glue, asphalt glue and silicone sealant. For example, most of the road joints of old airports use polyurethane glue, but polyurethane glue, polysulfide glue and asphalt glue have relatively poor weather resistance, UV aging resistance, tensile modulus, and cold and heat resistance. Big flaw. Silicone sealant has good advantages in application due to its excellent weather aging resistance, ultraviolet aging resistance and elastic recovery performance. However, silicone sealant has low tear strength and high modulus, which makes its bonding performance poor after water immersion, heat treatment, cold drawi...

Claims

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Application Information

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Patent Type & Authority Patents(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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