Silicone sealant and preparation method thereof

A sealant and silicone technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve problems such as loosening of bonded materials, poor deep curing, debonding, etc., to improve flexibility, The effect of increasing the vulcanization speed and improving the ability of crosslinking reaction

Active Publication Date: 2021-11-26
GUANGZHOU BAIYUN CHEM IND
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the deketoxime type sealant on the market has a faster surface drying speed, but the depth of curing is generally poor. Generally, the curing depth of 24 hours is only about 2-4mm, which leads to the existence of defects when the bonded materials move in a short time. Risk of loosening, debonding and falling, a drawback that is evident in industrial product applications

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Silicone sealant and preparation method thereof
  • Silicone sealant and preparation method thereof
  • Silicone sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0043] This embodiment also provides a method for preparing a silicone sealant, comprising the following steps:

[0044] (1) Preparation of curing agent: reacting diethylene glycol with 3-isocyanatopropyl trialkoxysilane to obtain an intermediate product; reacting the obtained intermediate product with methyl ethyl ketone oxime to obtain a curing agent;

[0045] (2) mixing the α,ω-dihydroxypolydimethylsiloxane, reinforcing filler and plasticizer to obtain a base material;

[0046] (3) Mixing the base material obtained in step (2) with the crosslinking agent, curing agent, coupling agent and catalyst to obtain a silicone sealant.

[0047] In some embodiments, the 3-isocyanatopropyltrialkoxysilane is 3-isocyanatopropyltrimethoxysilane or 3-isocyanatopropyltriethoxysilane.

[0048]In some of these embodiments, in the step (1), the reaction also includes a catalyst, the catalyst is cyclohexylamine, and the addition amount of the cyclohexylamine is 0.5‰-1.5 parts by weight of the ...

Embodiment 1

[0064] Formulation of silicone sealant:

[0065]

[0066] The preparation method of silicone sealant is as follows:

[0067] (1) Preparation of curing agent: under the condition of nitrogen protection, diethylene glycol is slowly added dropwise to 3-isocyanatopropyltrimethoxysilane of twice the molar amount at room temperature to react for 4 hours, and cool to After room temperature, add methyl ethyl ketone oxime in a molar ratio of 8 times, and then add cyclohexylamine of 1‰ of the total material as a catalyst, slowly heat to 110-130°C and react for 6 hours to remove excess methyl ethyl ketone oxime to obtain a curing agent.

[0068] (2) Add a,ω-dihydroxy polydimethylsiloxane, nanometer calcium carbonate and simethicone oil into the kneader and mix evenly according to the above weight parts, heat to 120-130°C, vacuum- 0.095MPa or more continued for 2 to 3 hours, and the obtained base material was cooled to room temperature.

[0069] (3) Add crosslinking agent, curing age...

Embodiment 2

[0071] Formulation of silicone sealant:

[0072]

[0073] The preparation method of this embodiment is the same as that of Example 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
viscosityaaaaaaaaaa
elongation at breakaaaaaaaaaa
Login to view more

Abstract

The invention relates to a silicone sealant and a preparation method thereof. The silicone sealant is prepared from raw materials including the following components in parts by weight: 90-110 parts of a,ω-dihydroxy polydimethylsiloxane; 10-150 parts of reinforcing filler; 2-10 parts of plasticizer 2-20 parts of cross-linking agent; 2-10 parts of curing agent; 1-10 parts of coupling agent; 0.01-1.5 parts of catalyst. The organic silicon sealant of the invention can realize fast deep curing, and has good hardness and mechanical properties.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a silicone sealant and a preparation method thereof. Background technique [0002] Silicone sealant is a type of silicone product that is widely used in various industries. It can be used in a wide temperature range (-100°C to 300°C), which is beyond the reach of other elastomers. Weathering resistance is one of its greatest advantages, coupled with excellent properties such as good electrical properties, high and low temperature resistance, and adhesion, it has become a widely used silicone material. [0003] According to the packaging form of the product, silicone sealants are divided into two types: one-component and two-component. Among them, the one-component RTV silicone rubber is packaged in a sealed rubber cartridge. When used, it is extruded from the package and exposed to moisture in the air to cross-link and cure. The degree of vulcanization is from the surface to the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/04C09J11/06C09J11/04
CPCC08K2003/265C08K2201/011C08K2201/014C09J11/04C09J11/06C09J183/04C08K13/02C08K3/26C08K5/5465C08K5/544C08K13/04C08K7/26C08K5/5435
Inventor 周熠蒋金博付子恩郑常华宋立芝
Owner GUANGZHOU BAIYUN CHEM IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap