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Silicone sealant and preparation method thereof

A silicone sealant, gas phase method, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problem of low elongation at break, poor lasting adhesion of concrete pavement, debonding between colloid and gap interface, etc. problems, to achieve the effect of maintaining road traffic safety, improving road quality and service life

Active Publication Date: 2021-08-17
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silicone sealant used in general technology has low elongation at break, high modulus, and poor durable adhesion to concrete pavement. Long-term use is prone to debonding between the colloid and the gap interface, which cannot fully meet the needs of concrete road joints. Technical parameter requirements

Method used

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  • Silicone sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A concrete road seam is made of silicone sealant, made of a weight of the following weight:

[0045] α, ω-dihydroxy polymethylsiloxane: 100 parts

[0046] Heavy calcium carbonate: 130 copies

[0047] Gas phase method silica: 11 copies

[0048] Dimethylsilicone oil: 50 parts

[0049] Dimethyl dibutyl oxime silane: 2 parts

[0050] Methyl tributtyzine silane: 9 parts

[0051] Vinyl tributyltone silane: 3 parts

[0052] γ-aminopropyl triethoxysilane: 2 parts

[0053] Di-Jutikikikin 桂 酸: 0.1

[0054] The preparation method of silicone sealing gelatin with a concrete road seam is as follows:

[0055] A. A, ω-dihydroxy polyimethylsiloxane, heavy calcium carbonate, plasticizer, and gas phase method for 1.5 hours at room temperature to obtain a base;

[0056] B, a chain extender, a crosslinking agent, a coupling agent, and a catalyst were added to the base, and stirred at room temperature and a vacuum degree of 0.08 to 0.1 MPa, the silicone sealant was obtained.

Embodiment 2

[0058] A concrete road seam is made of silicone sealant, made of a weight of the following weight:

[0059] α, ω-dihydroxy polymethylsiloxane: 100 parts

[0060] Heavy calcium carbonate: 130 copies

[0061] Gas phase method silica: 11 copies

[0062] Dimethylsilicone oil: 50 parts

[0063] Dimethyl dibutyl oxime silane: 4 parts

[0064] Methyl tributtyzine silane: 9 parts

[0065] Phenyl tributyltone silane: 3 parts

[0066] γ-aminopropyl triethoxysilane: 2 parts

[0067] Di-Jutikikikin 桂 酸: 0.1

[0068] The preparation method of silicone sealing gelatin with a concrete road seam is as follows:

[0069] A. A, ω-dihydroxy polyimethylsiloxane, heavy calcium carbonate, plasticizer, and gas phase method for 1.5 hours at room temperature to obtain a base;

[0070] B, a chain extender, a crosslinking agent, a coupling agent, and a catalyst were added to the base, and stirred at room temperature and a vacuum degree of 0.08 to 0.1 MPa, the silicone sealant was obtained.

Embodiment 3

[0072] A concrete road seam is made of silicone sealant, made of a weight of the following weight:

[0073] α, ω-dihydroxy polymethylsiloxane: 100 parts

[0074] Heavy calcium carbonate: 130 copies

[0075] Gas phase method silica: 11 copies

[0076] Dimethylsilicone oil: 50 parts

[0077] Dimethyl dibutyl oxime silane: 6 parts

[0078] Vinyl tributyltone silane: 9 parts

[0079] Phenyl tributyltone silane: 3 parts

[0080] γ-shrinkion glycerol ether oxyl triethoxysilane: 2 parts

[0081] Di-Jutikikikin 桂 酸: 0.1

[0082] The preparation method of silicone sealing gelatin with a concrete road seam is as follows:

[0083] A. A, ω-dihydroxy polyimethylsiloxane, heavy calcium carbonate, plasticizer, and gas phase method for 1.5 hours at room temperature to obtain a base;

[0084] B, a chain extender, a crosslinking agent, a coupling agent, and a catalyst were added to the base, and stirred at room temperature and a vacuum degree of 0.08 to 0.1 MPa, the silicone sealant was obtained.

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Abstract

The invention relates to a silicone sealant and a preparation method thereof. The silicone sealant is made of raw materials comprising the following components in parts by weight: a, ω-dihydroxy polydimethylsiloxane: 100 parts, heavy calcium carbonate: 20-150 parts, gas phase method Silica: 1-20 parts, plasticizer: 10-60 parts, chain extender: 2-20 parts, cross-linking agent: 5-20 parts, coupling agent: 1-10 parts, catalyst: 0.01-1 Parts; the fumed silica is fumed silica treated with dimethyldichlorosilane hydrophobic. The silicone sealant of the invention has the advantages of high elongation, low modulus and good adhesion to concrete pavement, and can still maintain good performance under natural conditions for a long time.

Description

Technical field [0001] The present invention relates to the field of high molecular sealing materials, and more particularly to a silicone sealing gel and a preparation method thereof. Background technique [0002] The concrete pavement is a strip structure that is bare in nature, and the plates are very easily formed between the sectors and the sectors, resulting in destroying the concrete surface layer, and therefore set a certain width of the seam every other distance. In order to prevent seam sewing and foreign matter accumulation, the position of the seam must be sealed. my country's current concrete pavement seam material is mainly concentrated in polysulfide, neoprene, polyurethane and silicone materials. Among them, silicone sealant serves as a concrete road seam sealing material, which has excellent weather resistance, high and low temperature, good elastic recovery rate, and therefore has a huge advantage in practical applications. However, the silicone sealant of silic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06C09K3/10
CPCC08K2003/265C08L2205/025C09J11/04C09J11/06C09J183/04C09K3/10C08L83/04C08K13/02C08K3/26C08K3/36C08K5/544
Inventor 周熠王兵郑常华宋立芝付子恩
Owner GUANGZHOU BAIYUN CHEM IND
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