Method for preparing odorless and transparent 107 glue at ordinary pressure

A normal pressure and reaction technology, which is applied in the field of producing odorless and transparent 107 glue, can solve the problems of unpleasant fishy smell, yellowing of the colloid, and difficult to remove, so as to achieve no fishy smell, easy operation, and improved The effect of safety factor

Inactive Publication Date: 2013-12-11
矽时代材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the colloid produced by this method is yellow and has an unpleasant fishy smell, which is difficult to remove

Method used

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  • Method for preparing odorless and transparent 107 glue at ordinary pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Pump 1000kg of the qualified raw material D4 into the dehydration kettle, heat the material to reach 50°C, blow dry nitrogen gas into it, the nitrogen flow rate is 50L / min, stir and dehydrate under 1.5KPa vacuum for 60 minutes, and then enter the polymerization reactor , add 0.02kg KOH under stirring, heat the material to 140°C, react for 90 minutes, wait until the polymerization system becomes viscous, and the molar mass of polysiloxane reaches 10 5 Above, under normal pressure, dropwise add 0.04kg H to the reactant 3 PO 4 10kg of deionized water, added dropwise while reflux, reflux degradation reaction at 160°C for 1 hour after dropwise addition, and then remove low boilers in vacuum at 170°C, separate the low boilers from deionized water and then mix with raw materials Mixing and recycling, while the finished 107 glue with low boiling matter removed is discharged into barrels through a twin-screw glue extruder. During the production process, there is no peculia...

Embodiment 2

[0023] Pump 1000kg of the qualified raw material DMC into the dehydration kettle, heat the material to reach 40°C, blow dry nitrogen gas into it, the nitrogen flow rate is 50L / min, stir and dehydrate under 1.4KPa vacuum for 80 minutes, and then enter the polymerization reaction kettle , add 0.05kg KOH under stirring, heat the material to 130°C, and react for 80 minutes, until the polymerization system becomes viscous, and the molar mass of polysiloxane reaches 10 5 Above, under normal pressure, dropwise add 0.1kg H to the reactant 3 PO 4 30kg of deionized water, added dropwise while reflux, reflux degradation reaction at 155°C for 2 hours after the dropwise addition, and then remove low boilers in vacuum at 170°C, separate the low boilers from deionized water and then mix with raw materials Mixing and recycling, while the finished 107 glue with low boiling matter removed is discharged into barrels through a twin-screw glue extruder. During the production process, there i...

Embodiment 3

[0025] Pump 1000kg of the qualified raw material D4 or DMC into the dehydration kettle, heat the material to reach 45°C, blow dry nitrogen gas into it, the nitrogen flow rate is 50L / min, stir and dehydrate under 1.3KPa vacuum for 60 minutes, and then enter the polymerization reaction kettle, add 0.035kg KOH under stirring, heat the material to 120°C, react for 60 minutes, wait until the polymerization system becomes viscous, and the molar mass of polysiloxane reaches 10 5 Above, under normal pressure, dropwise add 0.07kg H to the reactant 3 PO 4 20kg of deionized water, added dropwise while reflux, reflux degradation reaction at 150°C for 1 hour after the dropwise addition, and then remove low boilers in vacuum at 170°C, separate the low boilers from deionized water and then mix with raw materials Mixing and recycling, while the finished 107 glue with low boiling matter removed is discharged into barrels through a twin-screw glue extruder. During the production process, ther...

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Abstract

The invention provides a method for producing 107 glue at ordinary pressure. The method comprises the following steps that S1, a raw material is added to a dehydration kettle for dehydration and then added to a polymerization reaction kettle; a catalyst is added under stirring and reacts; S2, a deionized aqueous solution mixed with H3PO4 or AcOH is added to a product obtained by reaction in Step S1 for degradation reaction; and S3, a product obtained in Step S2 is stirred and extruded by a twin-screw glue discharge machine with a vacuum port, wherein the temperature in the twin-screw glue discharge machine is 160-170 DEG C, and the catalyst is KOH, NaOH or LiOH. The method adopts the strong alkaline catalyst, so that the product is more transparent, and no yellowing or fishy smell exists in a produced RTV (room temperature vulcanization) product via testing.

Description

technical field [0001] The invention relates to the field of 107 glue production, more specifically, to a method for preparing odorless and transparent 107 glue under normal pressure. Background technique [0002] 107 rubber, also known as polydimethylsiloxane with hydroxyl head, silicone rubber has many unique and excellent properties that ordinary rubber does not have: 1. Excellent high and low temperature resistance, can be used at -60 ~ 250 ° C 2. Excellent electrical insulation performance, and the electrical performance remains basically unchanged in a wide range of operating temperature and frequency; 3. Excellent ozone resistance and weather aging resistance; 4. Non-toxic, with physiological Inert; 5. Excellent waterproof, oil and solvent resistance; 6. Good air permeability and selective air permeability. It is widely used in various fields of the national economy such as aerospace, electronics, machinery manufacturing, construction, coatings, medicine and health, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G77/16C08G77/06C08G77/08
Inventor 柯明新柯松
Owner 矽时代材料科技股份有限公司
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