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Silicone sealant as well as preparation method and production line thereof

A silicone sealant and production line technology, applied in chemical instruments and methods, adhesives, mixers, etc., can solve the problems of uneven local reaction of the sealant, adverse effects on the quality and mechanical properties of the silicone sealant, etc. The effect of production efficiency, good processing performance and uniform system

Pending Publication Date: 2021-12-24
HANGZHOU ZHIJIANG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of catalyst addition, the sealant is prone to local uneven reaction, accompanied by crust crystal particles, which will have a certain adverse effect on the phase and mechanical properties of the silicone sealant

Method used

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  • Silicone sealant as well as preparation method and production line thereof
  • Silicone sealant as well as preparation method and production line thereof
  • Silicone sealant as well as preparation method and production line thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1, a kind of production line of silicone sealant, refer to figure 1 , including a dynamic mixing mechanism 1, a static mixing mechanism 2 and a protection mechanism 3, connecting pipelines are arranged between the discharge end of the dynamic mixing mechanism 1 and the feeding end of the static mixing mechanism 2, and valves are arranged on the connecting pipelines. Wherein, the dynamic stirring mechanism 1 is a vertical planetary gear kneader. The static mixing mechanism 2 is a LXJTH-200 static mixer. In the production line, all connecting pipelines are provided with insulation layers (not shown on the way), and the insulation layers are insulation cotton wound on the surface of the connecting pipelines.

[0055] refer to figure 1 , The protection mechanism 3 includes an air intake device 31 and an air extraction device 32 . The air inlet device 31 is connected to the dynamic stirring mechanism 1 through the air inlet pipe 33, and the air inlet device 31 ...

Embodiment 1-1

[0057] Example 1-1, a silicone sealant, prepared through the production line as in Example 1, the preparation method is as follows:

[0058] S1. Pump through the protection mechanism 3 for at least three times, and remove the air from the dynamic stirring mechanism 1, and then add 12kg of high-viscosity silicone rubber, 1.5kg of low-viscosity silicone oil, and 12kg of filler into the dynamic stirring mechanism 1 under vacuum. Stirring at 110° C. for 2 h to obtain the first mixed system;

[0059] S2. Naturally lower the temperature of the first mixing system to 20°C, pressurize the first mixing system into the static mixing system through the air inlet device 31, and uniformly add 1kg of ketoxime crosslinking agent and 0.1kg of silane to the static mixing system within 30 minutes After the coupling agent is added, continue to mix for 30 minutes, mix evenly, discharge and pack to obtain silicone glue.

[0060] Among them, the high-viscosity silicone rubber is 107 silicone rubbe...

Embodiment 1-2

[0062] Example 1-2, a silicone sealant, differs from Example 1-1 in that the amount of high-viscosity silicone rubber is 10.5 kg, the amount of filler is 10 kg, the amount of low-viscosity silicone oil is 3 kg, and the amount of ketone oxime The consumption of coupling agent is 0.9kg, and the consumption of silane coupling agent is 0.3kg.

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Abstract

The invention relates to the field of silicone sealants, in particular to a silicone sealant as well as a preparation method and a production line thereof. The silicone sealant comprises the following raw materials: high-viscosity silicone rubber, low-viscosity silicone oil, a filler, a ketoxime cross-linking agent and a silane coupling agent. The silicone sealant production line comprises a dynamic stirring mechanism and a static mixing mechanism. According to the silicone sealant, the ketoxime cross-linking agent is adopted, and the use of a catalyst is eliminated, so that the silicone sealant is more uniform, and the phenomena of skinning and crystallization are reduced.

Description

technical field [0001] The application relates to the field of silicone sealant, more specifically, it relates to a silicone sealant and its preparation method and production line. Background technique [0002] Silicone sealant is a rubber-like material with high weather resistance, high tensile strength and high adhesion, and its main component is polydimethylsiloxane. In silicone sealants, in order to increase the bonding speed between the glue and the base material and the curing speed of the glue itself on the surface and inside, organotin catalysts or other similar catalysts are often added to promote the reaction between the glue and the water in the air. Cured into an elastic colloid. [0003] During the process of adding the catalyst, the sealant is prone to local uneven reaction, accompanied by crust crystal particles, which will have a certain adverse effect on the phase and mechanical properties of the silicone sealant. Contents of the invention [0004] In or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06B01F13/10
CPCC09J183/04C09J11/04C09J11/06C08K2003/265C08L2205/025C08L83/04C08K3/26C08K5/5465C08K5/544C08K5/5435
Inventor 倪皇伟沈翔倪建华凌建锋沈永飞龚超杰徐俊王世展刘明何永富
Owner HANGZHOU ZHIJIANG NEW MATERIAL CO LTD
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