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Water-soluble organic silicon defoamer composition and water-based paint containing same

A technology of silicone defoamer and water-based paint, applied in the direction of paint, coating, foam dispersion/prevention, etc. containing biocide, it can solve the problems of limited use, inability to dissolve and reduce uniformly, and achieve full defoaming Characteristics, the effect of sufficient storage stability

Pending Publication Date: 2022-07-08
DOW TORAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, even though these silicone-based defoamers are water-dispersible, they cannot be uniformly dissolved in the water phase, resulting in suspension in the water phase or loss of transparency, so their use is limited
In addition, Patent Document 6 proposes adding polyether-modified silicone, polyol alkyl ether, and optionally polyvinyl alcohol and other water-soluble polymers to silicone-based defoamers. The ingredients disclosed in only improve water dispersibility, not dissolution

Method used

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  • Water-soluble organic silicon defoamer composition and water-based paint containing same
  • Water-soluble organic silicon defoamer composition and water-based paint containing same
  • Water-soluble organic silicon defoamer composition and water-based paint containing same

Examples

Experimental program
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Effect test

Embodiment 1～4 and comparative example 1～2

[0114] Stir and mix the above components with mechanical force (stirrer) to make the concentration reach the concentration (mass fraction) described in Table 1, adjust the water-soluble silicone defoamer, and after standing for 24 hours and 1 week, use the above method to judge its composition. The appearance and the presence or absence of phase separation are recorded in Table 1.

[0115] In addition, 0.4 part by mass (%) was added to the acrylic emulsion paint (based on EUDO (registered trademark) E-135 Co., Ltd. Nippon Shokubai Co., Ltd.), and the mixture was uniformly stirred by mechanical force (mixer), and its defoaming and other properties were evaluated by the above method. , and are shown in the table below.

[0116] [Table 2]

[0117]

Embodiment 5

[0121] The component B-1) of "Example 1" described in the above table was replaced with the component (B) of the present invention, that is, component B-14), and in the same manner as in Example 1, it was mechanically (stirred) Stir and mix evenly, adjust the water-soluble silicone defoamer, and after standing for 24 hours, use the above method to determine whether there is phase separation and record it. The results show that after using B-14) triethylene glycol butyl methyl ether, the composition can be uniformly dispersed and the composition can be dissolved in water.

[0122]

[0123] The water-soluble silicone antifoaming agents of the examples can be dissolved in water, so they are excellent in handling operability and uniform dispersibility, and if they are simply mixed with a mixer, a uniform and transparent silicone composition will be formed. , phase separation and other phenomena will not occur after 1 week. Furthermore, the composition not only obtains a uniform...

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Abstract

The present invention addresses the problem of providing: a water-soluble silicone defoamer composition which can be uniformly dissolved in an aqueous phase, meets the requirements for non-volatile organic compounds (VOC) as defined by WHO, and has excellent defoaming characteristics and storage stability; and an aqueous coating additive and an aqueous coating using the same. A water-soluble silicone defoamer composition according to the present invention contains: (A) a polyether-modified silicone, a polyglycerol-modified silicone, or a mixture thereof having an average HLB value in the range of 0.5-5.0; (B) one or more substances selected from the group consisting of triethylene glycol mono-n-butyl ether and triethylene glycol butyl methyl ether; and (C) water.

Description

technical field [0001] The invention relates to a water-soluble organic silicon defoamer composition and an aqueous coating containing the same. The invention also relates to a defoaming method and a quality maintaining method for the water-based paint characterized by adding the water-soluble organosilicon defoamer composition. Background technique [0002] In the past, compared with alcohols, esters, mineral oils, vegetable oils and synthetic oils and other non-organic silicon-based defoamers, silicone-based defoamers can exert a defoaming effect by adding a small amount, so they are used in the chemical, food industry, It is widely used as a foam breaker or foam suppressor in petroleum industry, textile industry, plastic industry, cement industry, coating adhesive industry and other fields, and various composition schemes have been proposed. In particular, silicone-based defoamers containing polyether-modified silicones such as polyoxyalkylene-modified groups, and option...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCC08K3/36C09D7/65C09D7/61C09D7/20C08K5/06B01D19/0409C08G77/46C08L83/12C08G77/16C08L71/00C08L83/00C09D201/00C09D5/14C08L71/02B01D19/02C08L83/04C09D183/04C09D183/12
Inventor 秋永恵一
Owner DOW TORAY CO LTD
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