Sealant and preparation method thereof

A sealant and sealing material technology, applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problems of slow surface drying time, long deep curing time, affecting the production process of precision electronic products, etc. Cured surface dry quickly, excellent bonding strength and physical and mechanical properties, the effect of excellent physical properties

Active Publication Date: 2019-12-20
HUIZHOU XINHAOYUAN DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The sealant using titanate as a catalyst has no corrosion to the substrate and has excellent adhesion, but the sealant using titanate as a catalyst has too slow surface drying time and a long deep curing time, which seriously affects the precision electronic products. production process

Method used

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  • Sealant and preparation method thereof
  • Sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The preparation method of sealant specifically comprises the following steps:

[0031] Step (1): Put 60g of nano-CaCO3, 1g of hexamethylsilazane and 100g of α, ω dihydroxy polydimethylsiloxane into a kneader and mix them. After kneading evenly, heat up to 100°C and evacuate to -0.08MPa Degassing for 90 minutes to obtain sealing material base 1;

[0032] Step (2): Put the base material 1 obtained in step (1) into a power mixer, then mix 10 g of trimethylisopropenyloxysilane with it, and stir evenly at room temperature for 20 minutes to obtain the sealing material base 2 ;

[0033] Step (3): Put 3g of N-(2-aminoethyl)-3-aminopropyltrimethoxysilane into the obtained sealing material base material 2, and stir evenly at room temperature for 20 minutes to obtain the sealing material base material 3;

[0034] Step (4): Put 3 g of tackifying resin into the sealing material base 3 obtained in step (3), and stir evenly at room temperature for 20 minutes to obtain sealing materi...

Embodiment 2

[0037] The preparation method of sealant specifically comprises the following steps:

[0038] Step (1): Put 60g SiO2, 2g lactone and 100gα,ωdihydroxy polydimethylsiloxane into a kneader and mix them. After kneading evenly, heat up to 120°C and vacuumize to -0.06MPa for 120min to obtain a sealed seal. material base1;

[0039] Step (2): Put base material 1 obtained in step (1) into a dynamic mixer, then mix 12 g of phenyltriisopropenyloxysilane with it, and stir evenly at room temperature for 30 minutes to obtain sealing material base 2;

[0040] Step (3): Put 3 g of γ-aminopropyltrimethoxysilane into the obtained sealing material base 2, and stir evenly at room temperature for 30 minutes to obtain the sealing material base 3;

[0041] Step (4): Mix the sealing material base 3 obtained in step (3) with 5 g of tackifying resin, and stir evenly at room temperature for 30 minutes to obtain the sealing material base 4;

[0042] Step (5): Mix the sealing material base 4 obtained in...

Embodiment 3

[0044] The preparation method of sealant specifically comprises the following steps:

[0045] Step (1): Put 70g of kaolin, 2g of tris (6-isocyanatohexyl) isocyanate and 90g of α, ω dihydroxy polydimethylsiloxane into the kneader and mix them. After kneading evenly, heat up to 110°C and evacuate to -0.085MPa defoaming for 120min to obtain sealing material base 1;

[0046] Step (2): put the base material 1 obtained in step (1) into a dynamic mixer, then mix 12 g of vinyltriisopropenyloxysilane with it, and stir evenly at room temperature for 30 minutes to obtain the sealing material base 2;

[0047] Step (3): Put 3 g of γ-aminopropyltriethoxysilane into the obtained sealing material base 2, and stir evenly at room temperature for 30 minutes to obtain the sealing material base 3;

[0048] Step (4): Mix the sealing material base 3 obtained in step (3) with 3 g of tackifying resin, and stir evenly at room temperature for 30 minutes to obtain sealing material base 4;

[0049] Step...

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Abstract

The invention discloses a sealant and a preparation method thereof. The sealant has low volatility, has volatility of 0.01-0.025%, cannot leave oil stain or mist in an electronic product, is safe andenvironmentally friendly, and meets the European Union RoHS standard. The sealant has excellent bonding strength and physical and mechanical properties, the tensile strength can reach 181.2-187.1kg/cm<2>, and bending strength can reach 420-430kg/cm<2>. The sealant has the characteristic of quick drying of solidified surface, and surface drying time and deep curing time can be adjusted, wherein thesurface drying time can reach 1-20 minutes (the temperature is 20-25 DEG C, and the relative humidity is 60%). The sealant has a characteristic of wide applicability, has no corrosion to base materials, and has excellent physical properties to various plastics such as acrylonitrile butadiene styrene (ABS), polyvinyl chloride (PVC), high density polyethylene (HDPE), polycarbonate (PC) and the likeand to coated metals. The sealant has low production requirements and is suitable for mass production, popularization and use.

Description

technical field [0001] The invention belongs to the field of sealing materials, and in particular relates to a sealant and a preparation method thereof. Background technique [0002] The role of sealants in precision electronic components is mainly sealing and protection. Sealants do not have a good protective and sealing effect on precision electronic components, which will lead to a decline in the waterproof effect of electronic components in precision electronic products or precision electronic products. Electronic components in electronic products will then absorb moisture in the air, resulting in short circuit or ineffective response of electronic components. Therefore, precision electronic products must be sealed and protected to improve the waterproof level of precision electronic products. [0003] Most of the RTV sealants used in the electronics industry on the market are dealcoholized. Dealcohol-type sealants have more low molecules and higher volatility during th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J183/07C09J11/06C09J11/04
CPCC08K2003/265C08K2201/011C08K2201/014C08L2205/025C09J11/04C09J11/06C09J183/04C08L83/04C08K13/02C08K3/26C08K5/544C08K5/5425C08K3/36C08K3/346C08K3/34C08K5/5435
Inventor 钟法往江日新卢观庆陈凯虹
Owner HUIZHOU XINHAOYUAN DEV
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