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Monocomponent addition type silicone rubber packaging glue with strong cohesiveness and preparation method thereof

A cohesive and additive technology, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, chemical instruments and methods, etc., can solve the problems of poor bonding performance of substrates and improve production efficiency , time-saving, strong bonding effect

Active Publication Date: 2012-06-13
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Throughout the existing patents and literature, the addition-type silicone rubber encapsulant described therein is either a one-component system but has poor bonding performance with the substrate after vulcanization; or it is a two-component system that needs to be mixed before use. two-component

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In parts by weight, add 30 parts of 1,3,5,7-tetramethylcyclotetrasiloxane and 115 parts of allyl glycidyl ether into the three-necked flask; blow nitrogen, add 0.1 parts of platinum catalyst, and react at 60°C for 3 hours ; Reaction mixture 150 ° C under reduced pressure (10kPa) distillation to remove low boilers, to obtain organopolysiloxane tackifier.

[0020] In parts by weight, 80 parts of vinyl silicone oil with a vinyl content of 0.1wt% and a viscosity of 1000mPa·s, 10 parts of MQ silicone resin with a viscosity of 1000mPa·s, 20 parts of hydrogen-containing silicone oil with a hydrogen content of 0.3wt%, organic Mix 2 parts of polysiloxane tackifier, 2 parts of white carbon black, and 5 parts of titanium dioxide in a mixer for 30 minutes at high speed (3500 rpm); then add 0.1 part of inhibitor and mix at high speed for 10 minutes (3500 rpm); finally add 0.2 parts of platinum catalyst were mixed at a medium speed for 30 minutes (1500 rpm), and discharged to obtain ...

Embodiment 2

[0026] The preparation method of the organopolysiloxane tackifier is the same as in Example 1.

[0027] In parts by weight, 100 parts of vinyl silicone oil with a vinyl content of 5.0wt% and a viscosity of 7500mPa·s, 5 parts of MTQ silicone resin with a viscosity of 30000mPa·s, 10 parts of hydrogen-containing silicone oil with a hydrogen content of 3.0wt%, organic 1 part of polysiloxane tackifier, 3 parts of white carbon black, and 1 part of titanium dioxide were mixed in a mixer for 10 minutes at high speed (4000 rpm); then 0.3 parts of inhibitor were added and mixed at high speed for 5 minutes (4000 rpm); finally added 0.5 parts of the platinum catalyst were mixed at a medium speed for 10 minutes (2000 rpm), and discharged to obtain a one-component strong adhesive addition type silicone rubber encapsulant.

[0028] The one-component strong cohesive addition type silicone rubber encapsulant obtained above was made into a sample according to GB / T 7124-2008 (Determination of Te...

Embodiment 3

[0033] The preparation method of the organopolysiloxane tackifier is the same as in Example 1.

[0034]In parts by weight, 120 parts of vinyl silicone oil with a vinyl content of 10.0wt% and a viscosity of 10000mPa·s, 20 parts of MT silicone resin with a viscosity of 10000mPa·s, 30 parts of hydrogen-containing silicone oil with a hydrogen content of 2.0wt%, organic Mix 3 parts of polysiloxane tackifier, 1 part of white carbon black, and 3 parts of titanium dioxide in a mixer for 60 minutes at high speed (2500 rpm); add 0.5 parts of inhibitor and mix at high speed for 20 minutes (2500 rpm); finally add 0.1 part of the platinum catalyst was mixed at a medium speed for 20 minutes (1000 rpm), and the material was discharged to obtain a one-component strong adhesive addition type silicone rubber encapsulant.

[0035] The one-component strong-adhesive addition-type silicone rubber encapsulant obtained above was made into a sample according to GB / T 7124-2008 (Determination of Tensile...

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Abstract

The invention relates to a monocomponent addition type silicone rubber packaging glue with strong cohesiveness and a preparation method thereof. The packaging glue comprises, by weight, 80-120 parts of vinyl silicone oil, 5-20 parts of vinyl silicone resin, 10-30 parts of hydrogen-containing silicone oil, 1-3 parts of white carbon black, 1-5 parts of titanium dioxide, 0.1-0.5 part of inhibitor and 0.1-0.5 part of platinum catalyst. The preparation method comprises steps of: first mixing vinyl silicone oil, vinyl silicone resin, hydrogen-containing silicone oil, organic polysiloxane adhesion agent, white carbon black and titanium dioxide by high speed stirring; then adding inhibitor and mixing by high speed stirring; finally adding platinum catalyst and mixing by middle speed stirring; and discharging. After sulfuration, the monocomponent addition type silicone rubber packaging glue prepared by the method of the invention has a bonding strength with a base material (copper) higher than 1.86 MPa.

Description

technical field [0001] The invention relates to an addition type silicone rubber encapsulation glue and a preparation method thereof, in particular to a one-component strong adhesive addition type silicone rubber encapsulation glue and a preparation method thereof. Background technique [0002] Addition-type liquid silicone rubber does not produce by-products during the vulcanization process, has a very small shrinkage rate, can be vulcanized deeply, has good high-temperature sealing performance, is convenient for processing and molding, and is easy to realize automatic production; after vulcanization, it is resistant to high and low temperature, ultraviolet rays, and radiation. Insulating and physiologically inert. Therefore, addition-type liquid silicone rubber is often used as a packaging material for electronic components to prevent moisture, dust and harmful gases from affecting electronic components, and to slow down the vibration of components, thereby protecting elec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/07C09J183/05C09J11/08C09J11/04C09K3/10
Inventor 凌钦才谢国庆郭文欣
Owner SHANGHAI RES INST OF CHEM IND
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