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Preparation and compounding method of a long-chain alkyl ester modified silicone defoamer

A technology of silicone defoamer and long-chain alkyl ester, which is applied in the field of water-based ink additives and its preparation, can solve the problems of poor foam suppression ability and demulsification of defoamers, and achieve good foam suppression performance and short reaction time. Short, the effect of improving printing performance

Active Publication Date: 2017-02-01
KUSN ZHANGPU COLOR PRINTING FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The primary purpose of the present invention is to provide a method for preparing a long-chain alkyl ester modified silicone defoamer with simple reaction conditions, short reaction time and convenient operation; another purpose is to provide a long-chain alkyl ester modified The compound method of non-toxic silicone defoamer, and the compounded defoamer is applied to the gravure water-based ink, the defoamer presents some new characteristics: lubricity, antifouling and wear resistance, and It has good affinity to organic materials, does not affect the post-processing performance of the product, and also solves the problems of poor demulsification, defoaming and foam suppression of traditional defoamers

Method used

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  • Preparation and compounding method of a long-chain alkyl ester modified silicone defoamer
  • Preparation and compounding method of a long-chain alkyl ester modified silicone defoamer

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Embodiment 1 4

[0026] Embodiments 1-4: A preparation method of a long-chain alkyl ester modified silicone defoamer

[0027] Add a certain amount of n-undecyl methacrylate into the reactor, and then feed N into the reactor. 2 , to protect the double bond in n-undecyl methacrylate from oxidation;

[0028] Then, add catalyzer in reactor, heat reactor simultaneously and stir, and this moment, temperature in reactor rises slowly, and wherein, described catalyzer is chloroplatinic acid isopropanol solution that chloroplatinic acid mass fraction is 2%;

[0029] After the temperature is stabilized, control the temperature in the reactor to 60~90℃, and slowly add low-hydrogen silicone oil (0.34% hydrogen content), stir at constant temperature for 5~9 hours, Si-H bond and n-undecyl methyl The molar ratio of methyl acrylate is 1:1.0, 1:1.1, 1:1.2, 1:1.3, and the consumption of described catalyst is 0.015% of the total mass of described low hydrogen-containing silicone oil and n-undecyl methacrylate; ...

Embodiment 5 8

[0032] Embodiments five to eight: a preparation method of a long-chain alkyl ester modified silicone defoamer

[0033] Add a certain amount of cyclohexyl methacrylate into the reactor, and then feed N into the reactor. 2 , to protect the double bond in cyclohexyl methacrylate from being oxidized;

[0034] Then, add catalyzer in reactor, heat reactor simultaneously and stir, and this moment, temperature in reactor rises slowly, and wherein, described catalyzer is chloroplatinic acid isopropanol solution that chloroplatinic acid mass fraction is 2%;

[0035] After the temperature is stabilized, control the temperature in the reactor to 60°C, 70°C, 80°C, and 90°C respectively, and slowly add low-hydrogen silicone oil (hydrogen content is 0.05%-0.5%), and stir at constant temperature for 5-9 hours. The molar ratio of Si-H bond and cyclohexyl methacrylate is 1:1.2, and the consumption of described catalyst is 0.02% of the total mass of described low hydrogen-containing silicone oi...

Embodiment 9 13

[0038] Embodiments nine to thirteen: a preparation method of a long-chain alkyl ester modified silicone defoamer

[0039] Add a certain amount of octadecyl methacrylate to the reactor, and then feed N into the reactor. 2 , to protect the double bond in octadecyl methacrylate from being oxidized;

[0040] Then, add catalyzer in reactor, heat reactor simultaneously and stir, and this moment, temperature in reactor rises slowly, and wherein, described catalyzer is chloroplatinic acid isopropanol solution that chloroplatinic acid mass fraction is 2%;

[0041] After the temperature is stable, control the temperature in the reactor to 60~90°C, and slowly add low hydrogen-containing silicone oil (hydrogen content is 0.05%-0.5%), and stir at constant temperature for 5 hours, 6 hours, 7 hours, and 8 hours respectively. , 9 hours, the mol ratio of Si-H bond and stearyl methacrylate was 1:1.1, and the consumption of the catalyst was 0.025% of the total mass of the low hydrogen-containin...

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Abstract

The invention relates to a preparation method and a compounding method of long-chain alkyl ester modified organic silicon defoamer. The preparation method of the long-chain alkyl ester modified organic silicon defoamer is characterized by comprising the following steps: adding long-chain alkyl ester methyl acrylate shown in a formula (I), wherein R in the formula (I) is C6-20 linear chain alkyl or naphthene base, then introducing N2; the formula (I) is described in the specification; adding a catalyst, heating a reaction kettle and stirring; after temperature is stabilized, controlling temperature in the reaction kettle to be 60-90 DEG C, adding low-hydro silicone oil, and stirring at constant temperature, so that the long-chain alkyl ester modified organic silicon defoamer is obtained. The compounding method of the long-chain alkyl ester modified organic silicon defoamer is characterized by comprising the following steps: taking and placing silicon cream, a compound emulsifier and the long-chain alkyl ester modified organic silicon defoamer into a reaction vessel, stirring and heating to 50-70 DEG C, and carrying out reaction for 0.5-1.5 hours; adding a thickener aqueous solution, and stirring at a speed of 4000-6000r / min by adopting a high-speed homogenizer, so that a long-chain alkyl ester modified organic silicon compound defoamer is obtained. The prepared long-chain alkyl ester modified organic silicon defoamer has the advantages of lubricating property, antifouling property, wear resistance and good affinity on an organic material, and printing performance of intaglio water-based ink is improved.

Description

technical field [0001] The invention relates to a water-based ink additive and a preparation method thereof, in particular to a preparation and compounding method of a novel and efficient long-chain alkyl ester modified silicone defoamer, which is mainly used in gravure water-based ink in the industry. Background technique [0002] Gravure water-based ink is one of the new environmentally friendly printing materials in the 21st century. It has two remarkable characteristics: one is low viscosity and good fluidity; the other is that it does not use organic solvents, which is conducive to environmental protection. Among them, additives, as an important part of changing the performance of gravure water-based ink, have an important impact on its performance. [0003] At present, the defoamer used in large quantities is mainly silicone oil type. Silicone oil type defoamer is a low-toxicity, anti-oxidation defoamer, but its compatibility is poor, which affects the performance of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/38C09D11/03
Inventor 蒋平平王宇奇张萍波夏瑜俞晓琴
Owner KUSN ZHANGPU COLOR PRINTING FACTORY