CN110433533A - A kind of low viscosity organosilicon defoaming agent and preparation method thereof - Google Patents
A kind of low viscosity organosilicon defoaming agent and preparation method thereof Download PDFInfo
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- CN110433533A CN110433533A CN201810411338.4A CN201810411338A CN110433533A CN 110433533 A CN110433533 A CN 110433533A CN 201810411338 A CN201810411338 A CN 201810411338A CN 110433533 A CN110433533 A CN 110433533A
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- low viscosity
- defoaming agent
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- organosilicon defoaming
- basic catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D19/00—Degasification of liquids
- B01D19/02—Foam dispersion or prevention
- B01D19/04—Foam dispersion or prevention by addition of chemical substances
- B01D19/0404—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
- B01D19/0409—Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms
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- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Silicon Polymers (AREA)
Abstract
The invention belongs to organosilicon material technical fields more particularly to a kind of low viscosity organosilicon defoaming agent and preparation method thereof.A kind of low viscosity organosilicon defoaming agent is made of following content of component: poly- organic modified polyorganosiloxane 20-40 parts, 50-60 parts of vinyl silicone oil, 2-5 parts of coupling agent, organic siliconresin 3-8,1-3 parts of basic catalyst.
Description
Technical field
The invention belongs to organosilicon material technical field more particularly to a kind of low viscosity organosilicon defoaming agent and its preparation sides
Method.
Background technique
Foam is phenomenon common in life and work.But foam can bring great harm sometimes in the industrial production,
Such as working efficiency, delay working time, the quality for influencing product for reducing machine etc..The method for eliminating unwanted bubbles mainly has
Physical method and chemical method, defoaming agent defoaming is one of chemical method.With industrial enterprise's production scale and production efficiency
It greatly improves, defoaming agent defoaming, which joined, to be more widely applied.Currently, various defoaming agents are widely used in paper industry, spin
It knits in the industries such as printing and dyeing, oil exploitation and refining, coating, emulsion polymerization, sewage treatment, metal cleaning.
According to the difference of defoaming activity object, defoaming agent is divided into several main classes such as mineral oil origin, polyether-type and organic silicon
Type.Compared with other defoaming agents, organic silicon defoamer stable chemical performance, Small side effects, while in the case where dosage is very low
Also there are good defoaming capacity and lasting foam inhibition ability, thus by favor.Silicon composition is organic silicon defoamer
Core, its antifoaming speed and suds suppressing properties directly affect the performance of final products.For organic silicon defoamer, activity
The improvement of the antifoaming performance of object is the improvement direction of organic silicon defoamer.EP163541B1 is described with poly- containing terminal hydroxyl
Siloxanes reacts to form branch poly organo with the polysiloxane containing other active function groups under the effect of the catalyst
Alkane, and conventional silicone and hydrophilic silicon dioxide mixed processing are replaced with this, obtained defoaming agent has very high viscosity,
It is difficult to be emulsified and be dispersed in water.US5153258, which is described, to be introduced lightly crosslinked polysiloxane into system and can mention
The antifoaming performance of high composition, for example, polysiloxane containing vinyl and hydrogeneous polysiloxane, hydroxyl gather it is organic
Siloxanes and alkyl silicate crosslink reaction under the effect of the catalyst, but crosslinking degree is difficult to control.
CN1931417A discloses a kind of defoaming agent composition of resistance to highly basic of high temperature resistant, it is crosslinked by polysiloxanes and organic siliconresin
What reaction was added, it is bubbled test performance in black liquor after active matter is prepared into lotion, with preferable suds suppressing properties, but disappears
Bubble speed needs to be further increased, moreover, because defoaming activity object viscosity is larger, is dispersed in extremely difficult in water.EP-
A341952 introduces the composition of the silicone antifoam agent and one polysiloxane copolymer of polyethers that use branching as defoaming agent, uses
In pulp production.A kind of method that foam control composition for preparing siloxanes base is described in US4639489, this method
It is by the mixture of polysiloxane, filler, resin-like siloxanes and a kind of for promoting what the above component reacted to urge
Agent heats together at 50~300 DEG C.Japanese Laid-Open Patent Application the 5184814th (184814/93) describes a kind of control
Foaming composition, it contains the poly- silicon oxygen of dimethyl that end group is the dimethyl silicone polymer of trimethyl, end group is vinyl-dimethyl base
Alkane, dimethyl silicone polymer, methylhydrogensiloxacopolymer copolymer, trimethicone silicate, superfine silicon dioxide powder and platiniferous
Catalyst.But these foam control composition antifoam performances in strong alkali environment are bad, defoaming persistence is also bad.Especially exist
In high temperature strong alkali environment, disappear, foam inhibition activity it is undesirable.
Summary of the invention
The present invention to solve the above-mentioned problems, provides a kind of low viscosity organosilicon defoaming agent and preparation method thereof.
The present invention is realized using following technical scheme:
A kind of low viscosity organosilicon defoaming agent, is made of following content of component: poly- organic modified polyorganosiloxane 20-40
Part, 50-60 parts of vinyl silicone oil, 2-5 parts of coupling agent, organic siliconresin 3-8,1-3 parts of basic catalyst.
Preferably, the coupling agent is selected from vinyltriethoxysilane, 3- aminopropyl trimethoxysilane, 12- ammonia ten
Dialkyl group trimethoxy silane.
Preferably, in the silicone resin, between chain link (CH3) 3SiO1/2 (M unit) and chain link SiO4/2 (Q unit)
Molar ratio is (0.4~1.2): 1.0.
Preferably, the basic catalyst is selected from NaOH, KOH, silanol acid potassium, silanol acid sodium, sodium methoxide, sodium ethoxide, first
Potassium alcoholate, potassium ethoxide, beta-hydroxyethyl Trimethylamine, tetramethylammonium hydroxide
Preferably, the poly- organic modified polyorganosiloxane, the dynamic viscosity at 25 DEG C are 60~5000mPas.
A kind of preparation method of low viscosity organosilicon defoaming agent, comprises the following steps: 1. by poly- organic modified polyorganosiloxane,
Vinyl silicone oil, coupling agent and basic catalyst are in stirrer for mixing and heat, and base catalysis is added at 40~140 DEG C
0.5~6h is reacted in agent；2. organic siliconresin is added after completion of the reaction, and in 60~140 DEG C of 1~5h of reaction；3. end of reaction
Afterwards, mixture is maintained to 0.1~1.5h under -0.01~-0.08MPa vacuum degree, be finally cooled to room temperature to get.
The beneficial effects of the present invention are:
1. effectively reducing the probability contacted in manufacture course of products with atmosphere, guarantee the water in dewatered base-material and product
Vapour content is lower than 0.5% or less.
2. moisture content is controlled, dehydration procedure again can be reduced during base-material to product link, when reducing second dehydration
Between, it has saved total manufacturing cycle more conventionally manufactured time nearly 1.5 hours, energy consumption is effectively reduced.
3. the reduction of moisture content can effectively avoid sealant that implode phenomenon easily occurs in the fabrication process, effectively control
Product appearance particle, skinning, product storage period was up to 9 months.
Specific embodiment
In order to which those skilled in the art better understood when technical solution provided by the present invention, below with reference to specific
Embodiment is illustrated.
Embodiment 1
A kind of low viscosity organosilicon defoaming agent, is made of following content of component: poly- organic modified polyorganosiloxane 20-40
Part, 50-60 parts of vinyl silicone oil, 2-5 parts of coupling agent, organic siliconresin 3-8,1-3 parts of basic catalyst.
A kind of preparation method of low viscosity organosilicon defoaming agent, comprising the following steps: 1. will be added in 5L blender viscous
The dimethyl silicone polymer that the trimethylsiloxy group that degree is 1000mPas blocks, is added vinyl silicone oil, coupling agent and alkalinity
Catalyst is in stirrer for mixing and heats, and basic catalyst is added at 140 DEG C, reacts 0.5h；2. being added after completion of the reaction
Organic siliconresin, and in 140 DEG C of reaction 1h；3. after completion of the reaction, maintaining 1.5h under the vacuum degree of -0.01MPa, it is cooled to room
Temperature obtains the silicon composition that viscosity is 140000mPas.
Preferably, the coupling agent is selected from vinyltriethoxysilane, 3- aminopropyl trimethoxysilane, 12- ammonia ten
Dialkyl group trimethoxy silane.
Preferably, in the silicone resin, between chain link (CH3) 3SiO1/2 (M unit) and chain link SiO4/2 (Q unit)
Molar ratio is (0.4~1.2): 1.0.
Preferably, the basic catalyst is selected from NaOH, KOH, silanol acid potassium, silanol acid sodium, sodium methoxide, sodium ethoxide, first
Potassium alcoholate, potassium ethoxide, beta-hydroxyethyl Trimethylamine, tetramethylammonium hydroxide.
Embodiment 2
A kind of low viscosity organosilicon defoaming agent, is made of following content of component: poly- organic modified polyorganosiloxane 20-40
Part, 50-60 parts of vinyl silicone oil, 2-5 parts of coupling agent, organic siliconresin 3-8,1-3 parts of basic catalyst.
A kind of preparation method of low viscosity organosilicon defoaming agent, comprising the following steps: 1. will be added in 5L blender viscous
The dimethyl silicone polymer that the trimethylsiloxy group that degree is 500mPas blocks is added vinyl silicone oil, coupling agent and alkalinity and urges
Agent is in stirrer for mixing and heats, and basic catalyst is added at 40 DEG C, reacts 6h；2. organosilicon is added after completion of the reaction
Resin, and in 60 DEG C of reaction 5h；3. after completion of the reaction, maintaining 0.1h under the vacuum degree of -0.08MPa, it is cooled to room temperature and obtains
Viscosity is the silicon composition of 92000mPas.
Preferably, the coupling agent is selected from vinyltriethoxysilane, 3- aminopropyl trimethoxysilane, 12- ammonia ten
Dialkyl group trimethoxy silane.
Preferably, in the silicone resin, between chain link (CH3) 3SiO1/2 (M unit) and chain link SiO4/2 (Q unit)
Molar ratio is (0.4~1.2): 1.0.
Preferably, the basic catalyst is selected from NaOH, KOH, silanol acid potassium, silanol acid sodium, sodium methoxide, sodium ethoxide, first
Potassium alcoholate, potassium ethoxide, beta-hydroxyethyl Trimethylamine, tetramethylammonium hydroxide.
Embodiment 3
A kind of low viscosity organosilicon defoaming agent, is made of following content of component: 30 parts of poly- organic modified polyorganosiloxane, second
55 parts of alkenyl silicone oil, 3 parts of coupling agent, organic siliconresin 5,2 parts of basic catalyst.
A kind of preparation method of low viscosity organosilicon defoaming agent, comprising the following steps: 1. will be added in 5L blender
The dimethyl silicone polymer that the trimethylsiloxy group that 500g viscosity is 5000mPas blocks, is added vinyl silicone oil, coupling agent
It in stirrer for mixing and is heated with basic catalyst, basic catalyst is added at 80 DEG C, react 3h；2. adding after completion of the reaction
Enter organic siliconresin, and in 80 DEG C of reaction 4h；3. after completion of the reaction, maintaining 0.7h under the vacuum degree of -0.03MPa, it is cooled to
Room temperature obtains the silicon composition that viscosity is 70000mPas.
Preferably, the coupling agent is selected from vinyltriethoxysilane, 3- aminopropyl trimethoxysilane, 12- ammonia ten
Dialkyl group trimethoxy silane.
Preferably, in the silicone resin, between chain link (CH3) 3SiO1/2 (M unit) and chain link SiO4/2 (Q unit)
Molar ratio is (0.4~1.2): 1.0.
Preferably, the basic catalyst is selected from NaOH, KOH, silanol acid potassium, silanol acid sodium, sodium methoxide, sodium ethoxide, first
Potassium alcoholate, potassium ethoxide, beta-hydroxyethyl Trimethylamine, tetramethylammonium hydroxide.
Although the present invention is disclosed as above with preferred embodiment, however, it is not to limit the invention, any this field skill
Art personnel, without departing from the spirit and scope of the present invention, when can make a little modification and perfect therefore of the invention protection model
It encloses to work as and subject to the definition of the claims.
Claims (6)
1. a kind of low viscosity organosilicon defoaming agent, which is characterized in that be made of following content of component: gathering organically-modified poly- silicon oxygen
20-40 parts of alkane, 50-60 parts of vinyl silicone oil, 2-5 parts of coupling agent, organic siliconresin 3-8,1-3 parts of basic catalyst.
2. a kind of low viscosity organosilicon defoaming agent according to claim 1, which is characterized in that the coupling agent is selected from ethylene
Ethyl triethoxy silicane alkane, 3- aminopropyl trimethoxysilane, 12- ammonia dodecyltrimethoxysilane.
3. a kind of low viscosity organosilicon defoaming agent according to claim 1, which is characterized in that in the silicone resin, chain link
(CH3) molar ratio between 3SiO1/2 (M unit) and chain link SiO4/2 (Q unit) is (0.4~1.2): 1.0.
4. a kind of low viscosity organosilicon defoaming agent according to claim 1, which is characterized in that the basic catalyst is selected from
NaOH, KOH, silanol acid potassium, silanol acid sodium, sodium methoxide, sodium ethoxide, potassium methoxide, potassium ethoxide, beta-hydroxyethyl Trimethylamine, tetramethyl
Base ammonium hydroxide.
5. a kind of low viscosity organosilicon defoaming agent according to claim 1, which is characterized in that described to gather organically-modified poly- silicon
Oxygen alkane, the dynamic viscosity at 25 DEG C are 60~5000mPas.
6. a kind of method for preparing low viscosity organosilicon defoaming agent described in claim 1, which is characterized in that include following step
It is rapid: 1. poly- organic modified polyorganosiloxane, vinyl silicone oil, coupling agent and basic catalyst in stirrer for mixing and are heated,
Basic catalyst is added at 40~140 DEG C, reacts 0.5~6h；2. organic siliconresin is added after completion of the reaction, and 60~
140 DEG C of 1~5h of reaction；3. after completion of the reaction, mixture to be maintained to 0.1~1.5h under -0.01~-0.08MPa vacuum degree, most
After be cooled to room temperature to get.
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| CN201810411338.4A CN110433533A (en) | 2018-05-02 | 2018-05-02 | A kind of low viscosity organosilicon defoaming agent and preparation method thereof |
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| CN201810411338.4A CN110433533A (en) | 2018-05-02 | 2018-05-02 | A kind of low viscosity organosilicon defoaming agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892003A (en) * | 2021-02-05 | 2021-06-04 | 中海油(天津)油田化工有限公司 | Low-viscosity high-efficiency emulsion type defoaming agent for offshore oil field and preparation method thereof |
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2018
- 2018-05-02 CN CN201810411338.4A patent/CN110433533A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112892003A (en) * | 2021-02-05 | 2021-06-04 | 中海油(天津)油田化工有限公司 | Low-viscosity high-efficiency emulsion type defoaming agent for offshore oil field and preparation method thereof |
| CN112892003B (en) * | 2021-02-05 | 2022-05-13 | 中海油(天津)油田化工有限公司 | Low-viscosity high-efficiency emulsion type defoaming agent for offshore oil field and preparation method thereof |
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| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20191112 |
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| WD01 | Invention patent application deemed withdrawn after publication |