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Preparation method for high-viscosity 107 glue

A high-viscosity, high-viscosity technology, applied in the direction of adhesives, etc., can solve problems such as process control instability, and achieve the effects of high product yield, strong adhesion ability, and simple preparation process

Active Publication Date: 2012-07-11
JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The intermediate process control of this process is determined by the results of the intermediate control analysis, the process control is unstable, and there is also waiting waste

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method for high-viscosity 107 glue, according to the following weight ratio: 200 parts of DMC and 6 parts of 107 glue with a viscosity of 100cs are added in a reaction vessel equipped with a stirrer, a thermometer and a condensation reflux pipe, and the stirring is started, and the temperature is raised to At 110°C, add 15ppm potassium hydroxide or its silicon alkoxide alkali gel, and react at 150°C for 2 hours, add 15ppm phosphoric acid or its silicon alkoxide hydrochloride gel for direct neutralization, stir for 1 hour, at 1KPa / 180°C Remove until there is no distillate, and obtain 178.2 parts of modified 107 glue with a viscosity (25°C) of 480,000 cs, colorless, transparent and high viscosity, and a yield of 86.5%.

Embodiment 2

[0014] A preparation method of high-viscosity 107 glue, according to the following weight ratio: 200 parts of DMC and 30 parts of 107 glue with a viscosity of 750cs are added to a reaction vessel equipped with a stirrer, a thermometer and a condensing return pipe, and the stirring is started, and the temperature is raised to 110 Add 50ppm tetramethylammonium hydroxide or its silicon alkoxide alkaline gel catalyst at ℃, and react at this temperature for 3 hours, heat up and decompose the catalyst, and then decompose at 1KPa / 180℃ until there is no distillate, and the viscosity ( 25 ℃) 320,000 cs, 199.4 parts of modified 107 glue, colorless, transparent and high viscosity, with a yield of 86.7%; the yield is high.

Embodiment 3

[0016] A preparation method of high-viscosity 107 glue, according to the following weight ratio: 200 parts of DMC and 50 parts of 107 glue with a viscosity of 1500cs are added to a reaction vessel equipped with a stirrer, a thermometer and a condensing return pipe, and the stirring is started, and the temperature is raised to 100 Add 110ppm tetrabutyl phosphosilicate hydroxide alkali gel catalyst at ℃, and react at this temperature for 4 hours, heat up to decompose the basic catalyst, and then decompose at 1KPa / 180℃ until there is no distillate, and the viscosity (25℃ ) 800,000 cs, 215 copies of modified 107 glue, colorless, transparent and high viscosity, with a yield of 86.0%.

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Abstract

The invention relates to a preparation method for high-viscosity 107 glue. The preparation method comprises the following steps of: adding a certain amount of DMC (Dimethyl Carbonate) and 107 glue of which the viscosity is 100-1,500 cs or a certain amount of DMC into a reactor provided with a stirrer, a thermometer and a condensation reflowing pipe, starting stirring, heating to a certain temperature, and adding an alkali catalyst, wherein the alkali catalyst comprises one of potassium hydroxide, tetramethylammonium hydroxide pentahydrate, tetrabutyl phosphorus oxychloride or silicon alkoxidealkali gel of the alkalis; undergoing a balanced reaction at the temperature for certain hours, and directly neutralizing or heating for decomposing the alkali catalyst; and adding a phosphoric acid or silanol hydrochloric acid gel neutralizing agent of which the mass is equal to that of the catalyst under the condition that neutralization is performed, or directly heating for decomposing the alkali catalyst under the condition that neutralization is not performed, continuously stirring for 1 hour, and removing low-boiling-point substances. The high-viscosity 107 glue prepared with the methodhas the advantages of simple preparation process, stable viscosity, high product yield and capability of meeting production requirements.

Description

technical field [0001] The invention relates to a preparation method of 107 glue, in particular to a preparation method of high-viscosity 107 glue. Background technique [0002] Gum 107 is a hydroxyl terminated polydimethylsiloxane. It can be cured at room temperature with cross-linking agent and catalyst, and can maintain elasticity for a long time in the temperature range of -60 to 200 ° C. It has excellent electrical properties and chemical stability, and is resistant to water and weathering. Widely used in construction joints, insulation of electronic components, shockproof, moisture-proof, anti-corrosion, mold-making, demoulding of rubber and plastic products, as leather slip agent, release agent, etc. Special specifications can be used in fabric finishing and daily chemical industry superior. [0003] At present, the technological process of high viscosity 107 glue (>200,000 CS) is that DMC is first dehydrated at a certain temperature and under vacuum. Viscosity,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/44C08G77/16C08G77/06C09J183/10C09J183/06
Inventor 章淑娥杨秀伟张伶俐
Owner JIANGXI BLUESTAR XINGHUO SILICONE CO LTD
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