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A kind of low-density deketoxime type silicone sealant and preparation method thereof

A technology of silicone sealant and deketoxime, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the limitation of sealant density reduction, can not achieve improved mechanical properties, hollow glass microspheres High brittleness and other problems, to achieve the effect of reducing the density of the sealant, good foaming performance, and light weight

Active Publication Date: 2018-08-14
浙江中天东方氟硅材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hollow glass microsphere is a kind of inorganic crystal, its own weight is slightly larger, which has a certain limit to the degree of density reduction of the sealant; and the hollow glass microsphere is brittle, and it is easy to break after stirring or rolling. Broken glass cannot achieve the effect of improving mechanical properties, reducing density and weight, and has poor stability

Method used

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  • A kind of low-density deketoxime type silicone sealant and preparation method thereof
  • A kind of low-density deketoxime type silicone sealant and preparation method thereof
  • A kind of low-density deketoxime type silicone sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A low-density deketoxime type silicone sealant, consisting of the following components in parts by weight:

[0030] α,ω-Dihydroxypolydimethylsiloxane

100g

Simethicone

25g

Thermally expandable microcapsules F-48

0.3g

Vinyl tributylketoxime silane (crosslinking agent)

2g

Methyltributylketoximosilane (crosslinking agent)

15g

Modified CaCO 3 (reinforcing filler)

80g

γ-aminopropyltriethoxysilane (coupling agent)

2g

Dibutyltin dilaurate (catalyst)

0.2g

[0031] The preparation method of the low-density deketoxime type silicone sealant is as follows:

[0032] A. Mix 100g of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 30mpa·s, 25g of simethicone oil with a viscosity of 400pa·s, 0.3g of thermally expandable microcapsules F-48, and 80g of modified CaCO 3 After mixing, put it into a planetary stirring tank for stirring, control the temperature at 120°C, and mix for 3 hours under the ...

Embodiment 2

[0036] A low-density deketoxime type silicone sealant, which consists of the following components:

[0037] a,ω-Dihydroxypolydimethylsiloxane

100g

Simethicone

10g

Thermally expandable microcapsules F-50

0.5g

Methyltributylketoximosilane (crosslinking agent)

12g

Modified CaCO 3 (reinforcing filler)

100g

γ-(2,3-Epoxypropyl)propyltrimethoxysilane (coupling agent)

1.6g

Dibutyltin dilaurate (catalyst)

0.3g

[0038]The preparation method of the low-density deketoxime type silicone sealant is as follows:

[0039] A. Mix 100g of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 40mpa·s, 10g of simethicone oil with a viscosity of 500pa·s, 0.5g of thermally expandable microcapsules F-50, and 100g of modified CaCO 3 After mixing, put it into a planetary stirring tank for stirring, control the temperature at 130°C, and mix for 3 hours under the condition of vacuum degree -0.098MPa, and then pass N 2 , rem...

Embodiment 3

[0043] A low-density deketoxime type silicone sealant, which consists of the following components:

[0044] a,ω-Dihydroxypolydimethylsiloxane

100g

Simethicone

20g

Thermally expandable microcapsules F-78K

0.4g

Vinyl tributylketoxime silane (crosslinking agent)

2g

Methyltributylketoximosilane (crosslinking agent)

8g

Modified CaCO 3 (reinforcing filler)

120g

γ-aminopropyltriethoxysilane (coupling agent)

2.4g

Dioctyltin dilaurate (catalyst)

0.4g

[0045] The preparation method of the low-density deketoxime type silicone sealant is as follows:

[0046] A. 100 parts of α,ω-dihydroxy polydimethylsiloxane with a viscosity of 20mpa·s, 20g of simethicone oil with a viscosity of 450pa·s, 0.4g of thermally expandable microcapsules F-78K, and 120g of modified CaCO 3 After mixing, put it into a planetary stirring tank for stirring, control the temperature at 140°C, and mix for 3 hours under the conditi...

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Abstract

The invention discloses a low-density deketoxime type silicone sealant. The sealant comprises components in parts by weight as follows: 100 parts of alpha, omega-dyhydroxyl polydimethylsiloxane, 1-40 parts of dimethyl silicone oil, 0.1-4 parts of thermal expansion microcapsules, 1-25 parts of a cross-linking agent, 20-180 parts of reinforcing filler, 0.01-5 parts of a coupling agent and 0.005-1 part of a catalyst. The invention further discloses a preparation method of the low-density deketoxime type silicone sealant. The low-density deketoxime type silicone sealant has excellent mechanical property and adhesive property, the density of the sealant is remarkably reduced, the foaming effect is excellent, and the stability is high. According to the preparation method, a process is simple and easy to implement, equipment is conventional, operation is facilitated, and industrial large-scale production is facilitated.

Description

technical field [0001] The invention relates to a low-density deketoxime type silicone sealant and a preparation method thereof, and belongs to the field of synthesis of organic silicon downstream products. 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 constr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09J11/00C08J9/32
CPCC08J9/32C08J2383/06C08J2483/04C08L2203/14C08L2205/02C09J11/00C09J11/04C09J11/06C09J183/06C08L83/04C08K13/06C08K9/04C08K2003/265C08K5/5465
Inventor 杨庆红席先锋朱雪锋徐乔峰张洪涛
Owner 浙江中天东方氟硅材料股份有限公司
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