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Thixotropic agent and two-component silicone sealant containing thixotropic agent

A technology of silicone sealant and thixotropic agent, applied in the field of materials, can solve problems such as poor extrudability of silicone sealant, and achieve the effect of improving extrudability

Inactive Publication Date: 2020-09-29
HUBEI HUITIAN NEW MATERIALS STOCK CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem of poor extrudability of existing silicone sealant at low temperature, the present invention provides a thixotropic agent and a two-component silicone sealant containing the thixotropic agent

Method used

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  • Thixotropic agent and two-component silicone sealant containing thixotropic agent
  • Thixotropic agent and two-component silicone sealant containing thixotropic agent
  • Thixotropic agent and two-component silicone sealant containing thixotropic agent

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preparation example Construction

[0029] The raw materials for the preparation of component B include the following components in parts by weight: diluent: 100 parts, organopolysiloxane polymer: 10-100 parts, reinforcing filler: 20-60 parts, cross-linking agent: 10 parts Parts to 100 parts; Coupling agent: 5 parts to 50 parts, Catalyst: 0.1 parts to 10 parts.

[0030] The basic effect of using this range is good extrusion, easy construction, and moderate mechanical properties.

[0031] Further, in the two-component silicone sealant A component, the content of the thixotropic agent accounts for 0.06% to 1% by weight of the A component. The presented properties are better.

[0032] Further, component A: organopolysiloxane polymer: 100 parts, plasticizer: 35 parts to 45 parts, filler: 40 parts to 60 parts, thixotropic agent: 1 part to 2 parts;

[0033] Component B: diluent: 100 parts, organopolysiloxane polymer: 30-50 parts, reinforcing filler: 40-60 parts, cross-linking agent: 35-50 parts; coupling agent: 15 p...

Embodiment 1

[0054] Thixotropic preparation

[0055] Preparation method: Add ethyl acetate, hydrogen-containing silicone oil, and ethylene glycol monoallyl ether into the mixer according to the parts by weight in Table 1 and stir, add chloroplatinic acid after 10 minutes, and remove ethyl acetate and Thixotropic agents are obtained after small molecules.

[0056] The preparation raw material of table 1 thixotropic agent

[0057]

[0058]

Embodiment 2

[0060] Use thixotropic agent in embodiment 1 to prepare two-component silicone sealant

[0061] The preparation method is as follows:

[0062] Preparation of component A: 100 parts by weight of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 2000mPa·s at 25°C, 0.1 part by weight of a thixotropic agent, 20 parts by weight of nano-calcium carbonate, and a viscosity of 50mPa·s Add 20 parts by weight of simethicone oil into a kneader, knead at 40°C for 30 minutes, and discharge after cooling to obtain component A.

[0063] Preparation of component B: in a planetary machine, add 100 parts by weight of simethicone oil with a viscosity of 1000mPa·s at 25°C, and add α, ω-dihydroxy polydimethylsiloxane in portions under the state of nitrogen gas 25 parts by weight of alkane, 20 parts by weight of white carbon black, 10 parts by weight of methyltrimethoxysilane, 5 parts by weight of γ-glycidyl etheroxypropyl trimethoxysilane, 0.1 part by weight of dibutyltin dilaurate, after mix...

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Abstract

The invention provides a thixotropic agent and a double-component silicone sealant containing the thixotropic agent. The thixotropic agent is prepared from a component A and a component B. The component A is prepared from 100 parts of an organopolysiloxane polymer, 20-60 parts of a plasticizer, 20-80 parts of a filler and 0.08-2.8 parts of the thixotropic agent. The component B comprises 100 partsof a diluent, 25-100 parts of the organopolysiloxane polymer, 20-60 parts of a reinforcing filler, 10-100 parts of a cross-linking agent, 5-50 parts of a coupling agent and 0.1-10 parts of a catalyst. The thixotropic agent is added into the two-component silicone sealant, so that the extrudability of a system at low temperature is greatly improved, and the requirements of different occasions suchas buildings, automobiles and electronic appliances can be met.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a thixotropic agent and a two-component silicone sealant containing the thixotropic agent. Background technique [0002] Silicone sealant is a kind of silicone product, which is made of hydroxyl-terminated polysiloxane as the main raw material, supplemented by cross-linking agent, filler, plasticizer, coupling agent and catalyst in a vacuum state. Silicone sealants should cure to form elastic silicone rubber at room temperature by reacting with water in the air. Silicone sealant is easy to use, the volume shrinkage rate of the colloid after curing is small, the sealing performance is good, the adhesive force is strong, the tensile strength is high, and it has good aging resistance, high and low temperature resistance, electrical insulation resistance, and flex resistance. Flexibility, weather resistance, etc., widely used in high-tech industries such as construction, automob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/38C09J11/08C09J183/04
CPCC08G77/38C09J11/08C09J183/04C08L2205/025C08L2205/035C08K2201/011C08K2003/265C08L83/04C08K13/04C08K7/26C08K3/26
Inventor 章婧王翠花蔡海涛张兴龙赵勇刚章锋
Owner HUBEI HUITIAN NEW MATERIALS STOCK CO LTD
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