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Method for preparing aqueous organic silicone emulsion with phase reversion method

A technology of silicone emulsion and phase inversion method, applied in coatings and other directions, can solve the problems that the performance requirements of industrial coatings cannot be generally met, the promotion and application of water-based coatings is difficult, and the wide application is limited, so as to protect the health of contact personnel and overcome synthetic problems. High cost and the effect of reducing VOC emissions

Inactive Publication Date: 2018-10-12
ANHUI WILLY PAINT SCI & TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, in the field of industrial coating, the requirements for the appearance, mechanical properties, and resistance (especially water resistance) of the coating film are much higher than those for interior and exterior wall coatings of buildings, and different application occasions have different requirements. Some of the original water-based coatings in my country The technical level of coatings cannot generally meet the performance requirements of industrial coatings
Secondly, some high-performance water-based coatings are relatively expensive due to factors such as technology, scale, and raw material costs and sources, which also limits their wide application.
Furthermore, in the painting industry, if there are no special mandatory measures required, most people are unwilling to take the initiative to give up the stable use of solvent-based coatings and take a certain risk to use water-based coatings due to the inertia of use. The promotion and application of new water-based coatings brings certain difficulties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for preparing waterborne silicone emulsion by reverse conversion method includes the following steps:

[0028] 1) Pump 85 parts of epoxy-modified silicone resin W304-1 into the distillation kettle according to the amount, heat it up to 110°C with suction and filter at a constant speed, the heating rate is 30°C / h; the suction pressure is not less than 0.08Mpa; The organic solvent contained is filtered, condensed and recycled to the receiving tank;

[0029] 2) Take a sample of the resin liquid after suction filtration to detect the solid content, the test volume is 1.5g, the number of test samples is 3, after measurement, bake in an oven at 150℃ for 1h, then take it out and weigh it for calculation. When the solid content exceeds 95%, Put the resin after suction filtration into a special mixing tank, add 1.1 parts of non-ionic emulsifier P-10 under stirring conditions, if the solid content is less than 95%, continue heating and suction filtration until it is qualified...

Embodiment 2

[0034] A method for preparing waterborne silicone emulsion by reverse conversion method includes the following steps:

[0035] 1) Pump 80 parts of epoxy-modified silicone resin W304-2 into the distillation kettle according to the amount, heat it up to 120℃ with suction and filter at a constant speed, the heating rate is 40℃ / h; the suction pressure is not less than 0.08Mpa; The organic solvent contained is filtered, condensed and recycled to the receiving tank;

[0036] 2) Take a sample of the resin liquid after suction filtration to detect the solid content, the test volume is 2g, the number of test samples is 3, after measurement, bake in an oven at 150℃ for 1h, and then take it out and weigh it. When the solid content exceeds 95%, Put the resin after suction filtration into a special mixing tank, add 1.1 parts of non-ionic emulsifier OP-10 under stirring conditions, if the solid content is less than 95%, continue heating and suction filtration until it is qualified; after stirrin...

Embodiment 3

[0041] A method for preparing waterborne silicone emulsion by reverse conversion method includes the following steps:

[0042] 1) Pump 70 parts of epoxy-modified silicone resin W304-3 into the distillation kettle according to the amount, heat it up to 100℃ with suction and filter at a constant speed, the heating rate is 30℃ / h; the suction pressure is not less than 0.08Mpa; The organic solvent contained is filtered, condensed and recycled to the receiving tank;

[0043] 2) Take a sample of the resin liquid after suction filtration to detect the solid content, the test volume is 1.5g, the number of test samples is 3, after measurement, bake in an oven at 150℃ for 1h, then take it out and weigh it for calculation. When the solid content exceeds 95%, Put the resin after suction filtration into a special mixing tank, add 1.5 parts of non-ionic emulsifier NP-10 under stirring conditions, if the solid content is less than 95%, continue heating and suction filtration until it is qualified;...

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Abstract

The invention provides a method for preparing aqueous organic silicone emulsion with a phase reversion method. The method comprises following steps: 1), 70-85 parts of epoxy-modified silicone resin isheated to 100-120 DEG C and subjected to suction filtration; 2), solid content of resin obtained after the suction filtration is detected, when the solid content is higher than 95%, 1-1.5 parts of anonionic emulsifier is added to the resin obtained in the step 1) and stirred, 0.5-1.0 part of an anionic emulsifier is added and stirred, 1.5-2.5 parts of a cosolvent is added, and stirring is continued; 3), 40-55 parts of deionized water is added slowly to a mixture obtained in the step 2), when liquid resin is completely converted into milk white opaque emulsion matter from a flowing transparent viscous liquid and viscosity begins to decrease, the adding speed of the deionized water is increased until the deionized water is totally added, and stirring is continued; 4), sampling is performedfor detection, filtering, weighing and packaging are performed after qualification; all the raw materials are taken in parts by weight. According to the method for preparing the aqueous organic silicone emulsion with the phase reversion method, the emulsion with small particle size, good stability and high cost performance is prepared by control for the emulsification technology.

Description

Technical field [0001] The invention relates to an aqueous polyester emulsion, in particular to a method for preparing an inverse conversion method aqueous organic silicon emulsion. Background technique [0002] In recent years, with the increasing awareness of national environmental protection and the increasingly stringent national environmental protection policies, the use of oily coatings with high VOC content has gradually been restricted, while water-based coatings rely on their low VOC content, environmental protection, safety, health and other factors, the application field It is also becoming more and more extensive, and will surely become one of the main trends in the future coatings field. The performance of water-based resin / emulsion has a significant impact on water-based coatings. At present, water-based resin / emulsion products on the market are still in the stage of continuous upgrading and optimization, with uneven quality and performance, which has a great impact...

Claims

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Application Information

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IPC IPC(8): C08J3/03C09D183/04C09D7/20C08L83/04
CPCC08J3/03C08J2383/04C09D7/20C09D183/04
Inventor 张桂传蔡旭东徐徐
Owner ANHUI WILLY PAINT SCI & TECH LTD
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