CN104761722A - Cation polysiloxane Pickering emulsion, preparation method and application thereof - Google Patents
Cation polysiloxane Pickering emulsion, preparation method and application thereof Download PDFInfo
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Abstract
The invention belongs to the technical filed of organosilicon preparation, and discloses a cation polysiloxane Pickering emulsion with low soap and excellent stability, a preparation method and an application thereof in a paint field. The method is characterized in that inorganic nanoparticles and a cationic surfactant form a primary emulsion, then the primary emulsion is polymerized with an organosilicon monomer and an alkalescence catalyst to obtain the cation polysiloxane Pickering emulsion. The prepared cation polysiloxane Pickering emulsion uses the cooperation emulsification effect of the inorganic particles and the cationic surfactant, and linear cation polysiloxane Pickering emulsion can be obtained by initiation of ring-opening polymerisation under alkaline condition. The obtained cation polysiloxane Pickering emulsion has low emulsifier content and excellent emulsion stability, a disperse system of the emulsion is aqueous environment, the emulsion has the characteristics of high wetability, good ageing resistance, excellent coating performance, and mild performance, has the advantages of simple production technology, environmental protection and obvious cost advantage, and can be widely used in the paint filed, especially waterproof paint field.
Description
Technical field
The invention belongs to organosilicon preparing technical field, particularly the cationic silicone pickering emulsion and preparation method thereof of a kind of low soap, excellent in stability and the application in paint field.
Background technology
Polysiloxane emulsion is the water-borne coatings that a class is commonly used, because polysiloxane molecule is both containing inorganic structure, again containing organic group, this molecular characterization integrating inorganics and organic characteristic, make polysiloxane water-based coating present excellent oilness, hydrophobicity, good kindliness, splendid ventilation property, protection against the tide and excellent physiological inertia etc., have broad prospect of application in the field such as appliance cord, building.
Traditional polysiloxane emulsion can be divided into anionic emulsion, cation emulsion and non-ionic type emulsion three major types by the kind of wherein added emulsifying agent, but generally all there is the problems such as emulsifier content is high, cost is high, stability of emulsion is not enough.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art with not enough, primary and foremost purpose of the present invention is the preparation method of the cationic silicone pickering emulsion providing a kind of low soap, excellent in stability.This preparation method's operating procedure is easy, controllability strong, and whole system is aqueous environments, safety and environmental protection.
The low soap that another object of the present invention is to provide aforesaid method to prepare, the cationic silicone pickering emulsion of excellent in stability.
Still a further object of the present invention is to provide the cationic silicone pickering emulsion of above-mentioned low soap, excellent in stability in paint field, the application particularly in waterproof paint field.
Object of the present invention is realized by following proposal:
The preparation method of the cationic silicone pickering emulsion of a kind of low soap, excellent in stability, first form primary emulsion by inorganic nano-particle and cats product, be polymerized with organosilane monomer and basic catalyst again, obtain cationic silicone pickering emulsion.
First preparation method of the present invention utilizes the synergic emulsifying effect of inorganic nano-particle and cats product to form primary emulsion and prepares cationic silicone pickering emulsion again.
Above-mentioned preparation method specifically comprises the steps:
(1) by inorganic nano-particle and cats product soluble in water, emulsification pretreatment, high-pressure homogeneous, make primary emulsion;
(2) in the primary emulsion of step (1), add organosilane monomer and basic catalyst, emulsification pretreatment again, high-pressure homogeneous, reacting by heating obtains cationic silicone pickering emulsion.
In preparation method of the present invention, the mass ratio of inorganic nano-particle used, cats product, basic catalyst, organosilane monomer is (2 ~ 4): (1.0 ~ 2.5): (0.5 ~ 1.5): 30.
Described organosilane monomer is preferably the one in organocyclosiloxanes.
Described organocyclosiloxanes has following logical structure shown in formula I:
Wherein, n is the natural number of 3 ~ 10; R
1, R
2identical or different, be respectively hydrogen, the alkyl of C1 ~ C16, thiazolinyl, cycloalkyl, aryl or alkaryl.
Preferably, described alkyl can be methyl, ethyl, n-propyl, sec.-propyl, normal-butyl, isobutyl-, the tertiary butyl, n-pentyl, isopentyl, neo-pentyl, tert-pentyl, n-hexyl, n-heptyl, n-octyl, iso-octyl, n-nonyl, positive decyl or dodecyl; Described thiazolinyl can be vinyl or allyl group; Described cycloalkyl can be cyclopentyl, cyclohexyl, suberyl or methylcyclohexyl; Described aryl can be phenyl or naphthyl; Described alkaryl can be o-tolyl, m-tolyl, p-tolyl, xylyl or ethylbenzene.
R described above
1, R
2be more preferably hydrogen, methyl, ethyl, n-propyl, sec.-propyl or vinyl.
Preferably, described organosilane monomer refers to hexamethyl cyclotrisiloxane (D
3), octamethylcyclotetrasiloxane (D
4), decamethylcyclopentaandoxane (D
5), t etram-ethyltetravinylcyclotetrasiloxane (D
4 vi), tetramethyl-tetrahydrochysene cyclotetrasiloxane (D
4 h), tetramethyl tetraphenyl cyclotetrasiloxane, 1,3,5,7-tetramethyl-four (3,3,3-trifluoro propyl) cyclotetrasiloxane, 1,3,5,7-tetramethyl-(3-cyanogen propyl group) cyclotetrasiloxane, ten diformazan basic ring six siloxanes, 1,2,3,4-tetramethyl--1,2,3,4-tetravinyl cyclotetrasiloxane or 1,2,3,4-tetramethyl--1,2,3,4-tetraphenyl cyclotetrasiloxane.
Preferably, described cats product comprises at least one in alkyl trimethyl quaternary ammonium salt, dialkyl dimethyl quaternary ammonium salt, benzalkonium dimethyl quaternary ammonium, monoalkyl quaternary ammonium salts, alkyl polyoxyethylene ylmethyl quaternary ammonium salt, N-alkyldiethanolamine salt, polyethylene polyamines salt, pyridinium salt, tetrahydroglyoxaline and morpholine, and wherein alkyl is the chain alkyl of C12 ~ C18.
Preferably, described inorganic nano-particle is gas phase nano silicon-dioxide, and preferably including particle diameter is at least one in 20nm, 25nm, 30nm and 40nm.
Preferably, described basic catalyst comprises at least one in sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, ammonium hydroxide and the aqueous solution thereof.
Preferred, at least one of described inorganic nano-particle to be particle diameter the be gas phase nano silicon-dioxide of 25nm and 30nm; Described cats product is at least one in octadecyl trimethyl ammonium chloride and palmityl trimethyl ammonium chloride; Described basic catalyst is potassium hydroxide aqueous solution; Described organosilane monomer is octamethylcyclotetrasiloxane.
Preferably, in above-mentioned preparation method first by inorganic nano-particle and cats product soluble in water, the amount of water used can be carried out adjustment and be determined according to the emulsion desired concn finally obtained, there is no particular restriction.
More preferably, in order to make the polysiloxane emulsion modest viscosity prepared, the amount of water used and the mass ratio of organosilane monomer are 62:30 ~ 67:30.
In above-mentioned preparation method, step (1), (2) described emulsification pretreatment preferably refer to stir 10 minutes at shearing rate 1000 ~ 1200 revs/min of down cuts.
High-pressure homogeneous preferred finger in above-mentioned preparation method described in step (1), (2) homogeneous under 20 ~ 40MPa.
Preferably, the reacting by heating described in step (2) refers to be heated to react 5 ~ 7h at 60 ~ 70 DEG C.
The primary emulsion that the present invention adopts inorganic nano-particle and cats product synergic emulsifying effect to prepare, causes organosilane monomer ring-opening polymerization, finally obtains linear polysiloxane pickering emulsion under basic catalyst effect.
Polysiloxane in the described linear polysiloxane emulsion that the present invention prepares is hydroxy-end capped polysiloxane, has the structure shown in logical formula II:
Wherein, m is the natural number of 1 ~ 1000, R
3, R
4, R
5, R
6, R
7, R
8identical or different, be respectively hydrogen, the alkyl of C1 ~ C16, thiazolinyl, cycloalkyl, aryl or alkaryl.
Preferably, the m in logical formula II is the natural number of 50 ~ 500; Be more preferably the natural number of 50 ~ 100.
Preferably, described alkyl can be methyl, ethyl, n-propyl, sec.-propyl, normal-butyl, isobutyl-, the tertiary butyl, n-pentyl, isopentyl, neo-pentyl, tert-pentyl, n-hexyl, n-heptyl, n-octyl, iso-octyl, n-nonyl, positive decyl or dodecyl; Described thiazolinyl can be vinyl or allyl group; Described cycloalkyl can be cyclopentyl, cyclohexyl, suberyl or methylcyclohexyl; Described aryl can be phenyl or naphthyl; Described alkaryl can be o-tolyl, m-tolyl, p-tolyl, xylyl or ethylbenzene.
The polysiloxane pickering emulsion that the present invention prepares is the synergic emulsifying effect utilizing inorganic particulate and cats product, emulsifier content is low, emulsion intercalation method is excellent, and the dispersion of emulsion is aqueous environments, have high wettability, anti-aging good, can screening characteristics is excellent, performance is gentle feature, become production art simple, environmental protection, cost advantage is obvious, paint field can be widely used in, particularly in waterproof paint field.
Mechanism of the present invention is:
The primary emulsion that the present invention adopts inorganic nano-particle and cats product synergic emulsifying effect to prepare, causes organosilane monomer ring-opening polymerization, finally obtains linear polysiloxane pickering emulsion under basic catalyst effect.Wherein, cats product is adsorbed in inorganic nano-particle sub-surface by electrostatic and hydrogen bond action and has synergic emulsifying effect, by emulsification pretreatment and high-pressure homogeneous, preparation forms pik woods primary emulsion, add basic catalyst and organosilane monomer again, linear polysiloxane pickering emulsion is obtained by ring-opening polymerization, preparation method's tensio-active agent usage quantity is few, good emulsion stability, synthesis step is few, simple to operate, cost is lower, safety and environmental protection, paint field can be widely used in, particularly building as waterproof paint, electronic applications has application prospect.
The present invention, relative to prior art, has following advantage and beneficial effect:
(1) polysiloxane pickering emulsion of the present invention is compared with the single surfactant emulsifies system of tradition, and emulsifier content is low, good emulsion stability.
(2) dispersion system of polysiloxane pickering emulsion of the present invention is aqueous environments, and environmental protection, technique is simple.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 20nm by 1.0g octadecyl trimethyl ammonium chloride and 2g particle diameter, use 66.5g water dissolution, to be dissolved fully after, (1000 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 20MPa homogenization pressure, homogeneous 2 times, makes primary emulsion.
(2) by 0.5g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add in above-mentioned primary emulsion, after stirring makes it to mix, (1000 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 30MPa homogenization pressure, homogeneous 3 times, makes pickering emulsion, be heated to 60 DEG C, guarantee that heating fully, reacts 5 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 104.5 °, and hydrophobic performance is excellent.
Embodiment 2: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 25nm by 1.5g palmityl trimethyl ammonium chloride and 2.5g particle diameter, use 65.5g water dissolution, to be dissolved fully after, (1100 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 20MPa homogenization pressure, homogeneous 3 times, makes primary emulsion.
(2) by 0.5g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1100 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 40MPa homogenization pressure, homogeneous 2 times, makes pickering emulsion, be heated to 60 DEG C, guarantee that heating fully, reacts 6 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 111.3 °, and hydrophobic performance is excellent.
Embodiment 3: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 30nm by 1.5g octadecyl trimethyl ammonium chloride and 3.0g particle diameter, use 64.5g water dissolution, to be dissolved fully after, (1200 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 20MPa homogenization pressure, homogeneous 3 times, makes primary emulsion.
(2) by 1.0g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1200 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 30MPa homogenization pressure, homogeneous 3 times, makes pickering emulsion, be heated to 60 DEG C, guarantee that heating fully, reacts 7 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 109.6 °, and hydrophobic performance is excellent.
Embodiment 4: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 30nm by 2.0g octadecyl trimethyl ammonium chloride and 3.5g particle diameter, use 63.0g water dissolution, to be dissolved fully after, (1100 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 20MPa homogenization pressure, homogeneous 3 times, makes primary emulsion.
(2) by 1.5g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1100 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 30MPa homogenization pressure, homogeneous 2 times, makes pickering emulsion, be heated to 60 DEG C, guarantee that heating fully, reacts 5 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 115.3 °, and hydrophobic performance is excellent.
Embodiment 5: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 40.0nm by 2.5g palmityl trimethyl ammonium chloride and 4.0g particle diameter, use 62.5g water dissolution, to be dissolved fully after, (1000 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 30MPa homogenization pressure, homogeneous 3 times, makes primary emulsion.
(2) by 1.0g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1000 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 40MPa homogenization pressure, homogeneous 2 times, makes pickering emulsion, be heated to 65 DEG C, guarantee that heating fully, reacts 6 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 117.1 °, and hydrophobic performance is excellent.
Embodiment 6: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 30.0nm by 2.0g octadecyl trimethyl ammonium chloride and 4.0g particle diameter, use 62.5g water dissolution, to be dissolved fully after, (1200 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 40MPa homogenization pressure, homogeneous 2 times, makes primary emulsion.
(2) by 1.5g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1200 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 20MPa homogenization pressure, homogeneous 2 times, makes pickering emulsion, be heated to 70 DEG C, guarantee that heating fully, reacts 7 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 117.1 °, and hydrophobic performance is excellent.
Embodiment 7: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 30.0nm by 1.5g octadecyl trimethyl ammonium chloride and 4.0g particle diameter, use 63.0g water dissolution, to be dissolved fully after, (1100 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 30MPa homogenization pressure, homogeneous 2 times, makes primary emulsion.
(2) by 1.5g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1100 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 20MPa homogenization pressure, homogeneous 2 times, makes pickering emulsion, be heated to 70 DEG C, guarantee that heating fully, reacts 5 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 108.7 °, and hydrophobic performance is excellent.
Embodiment 8: the preparation of polysiloxane pickering emulsion
(1) be the silicon-dioxide of 20.0nm by 1.0g octadecyl trimethyl ammonium chloride and 3.0g particle diameter, use 65.0g water dissolution, to be dissolved fully after, (1200 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then gained mixed solution is transferred in high pressure homogenizer, under 30MPa homogenization pressure, homogeneous 2 times, makes primary emulsion.
(2) by 1.0g potassium hydroxide, 30g octamethylcyclotetrasiloxane (D
4) add above-mentioned primary emulsion, after stirring makes it to mix, (1200 revs/min) are sheared 10 minutes in emulsification pretreatment stirrer high speed, then be transferred in high pressure homogenizer by gained mixed solution, under 20MPa homogenization pressure, homogeneous 2 times, makes pickering emulsion, be heated to 60 DEG C, guarantee that heating fully, reacts 6 hours, namely obtain linear polysiloxane pickering emulsion at 500 revs/min of lower Keep agitation 10min;
(3) above-mentioned polysiloxane pickering emulsion is down to room temperature, is coated in PVC board, recording it to water contact angle is 101.4 °, and hydrophobic performance is excellent.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from spirit of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. the preparation method of the cationic silicone pickering emulsion of a low soap, excellent in stability, it is characterized in that the method first forms primary emulsion by inorganic nano-particle and cats product, be polymerized with organosilane monomer and basic catalyst again, obtain cationic silicone pickering emulsion.
2. the preparation method of the cationic silicone pickering emulsion of low soap according to claim 1, excellent in stability, is characterized in that specifically comprising the steps:
(1) by inorganic nano-particle and cats product soluble in water, emulsification pretreatment, high-pressure homogeneous, make primary emulsion;
(2) in the primary emulsion of step (1), add organosilane monomer and basic catalyst, emulsification pretreatment again, high-pressure homogeneous, reacting by heating obtains cationic silicone pickering emulsion.
3. the preparation method of the cationic silicone pickering emulsion of low soap according to claim 1, excellent in stability, is characterized in that: the mass ratio of inorganic nano-particle used, cats product, basic catalyst, organosilane monomer is (2 ~ 4): (1.0 ~ 2.5): (0.5 ~ 1.5): 30.
4. the preparation method of the cationic silicone pickering emulsion of low soap according to claim 1, excellent in stability, is characterized in that: described organosilane monomer is the one in organocyclosiloxanes; Described organocyclosiloxanes has following logical structure shown in formula I:
Wherein, n is the natural number of 3 ~ 10; R
1, R
2identical or different, be respectively hydrogen, the alkyl of C1 ~ C16, thiazolinyl, cycloalkyl, aryl or alkaryl.
5. the preparation method of the cationic silicone pickering emulsion of low soap according to claim 4, excellent in stability, is characterized in that: described alkyl is methyl, ethyl, n-propyl, sec.-propyl, normal-butyl, isobutyl-, the tertiary butyl, n-pentyl, isopentyl, neo-pentyl, tert-pentyl, n-hexyl, n-heptyl, n-octyl, iso-octyl, n-nonyl, positive decyl or dodecyl; Described thiazolinyl is vinyl or allyl group; Described cycloalkyl is cyclopentyl, cyclohexyl, suberyl or methylcyclohexyl; Described aryl is phenyl or naphthyl; Described alkaryl is o-tolyl, m-tolyl, p-tolyl, xylyl or ethylbenzene.
6. low soap according to claim 1, the preparation method of the cationic silicone pickering emulsion of excellent in stability, it is characterized in that: described organosilane monomer refers to hexamethyl cyclotrisiloxane, octamethylcyclotetrasiloxane, decamethylcyclopentaandoxane, t etram-ethyltetravinylcyclotetrasiloxane, tetramethyl-tetrahydrochysene cyclotetrasiloxane, tetramethyl tetraphenyl cyclotetrasiloxane, 1, 3, 5, 7-tetramethyl-four (3, 3, 3-trifluoro propyl) cyclotetrasiloxane, 1, 3, 5, 7-tetramethyl-(3-cyanogen propyl group) cyclotetrasiloxane, ten diformazan basic ring six siloxanes, 1, 2, 3, 4-tetramethyl--1, 2, 3, 4-tetravinyl cyclotetrasiloxane or 1, 2, 3, 4-tetramethyl--1, 2, 3, 4-tetraphenyl cyclotetrasiloxane.
7. the preparation method of the cationic silicone pickering emulsion of low soap according to claim 1, excellent in stability, it is characterized in that: described cats product comprises at least one in alkyl trimethyl quaternary ammonium salt, dialkyl dimethyl quaternary ammonium salt, benzalkonium dimethyl quaternary ammonium, monoalkyl quaternary ammonium salts, alkyl polyoxyethylene ylmethyl quaternary ammonium salt, N-alkyldiethanolamine salt, polyethylene polyamines salt, pyridinium salt, tetrahydroglyoxaline and morpholine, and wherein alkyl is the chain alkyl of C12 ~ C18; Described inorganic nano-particle is gas phase nano silicon-dioxide; Described basic catalyst comprises at least one in sodium hydroxide, potassium hydroxide, lithium hydroxide, calcium hydroxide, ammonium hydroxide and the aqueous solution thereof.
8. the preparation method of the cationic silicone pickering emulsion of low soap according to claim 1, excellent in stability, is characterized in that: at least one of described inorganic nano-particle to be particle diameter the be gas phase nano silicon-dioxide of 25nm and 30nm; Described cats product is at least one in octadecyl trimethyl ammonium chloride and palmityl trimethyl ammonium chloride; Described basic catalyst is potassium hydroxide aqueous solution; Described organosilane monomer is octamethylcyclotetrasiloxane.
9. a cationic silicone pickering emulsion, is characterized in that the preparation method of the cationic silicone pickering emulsion of the low soap according to any one of claim 1 ~ 8, excellent in stability obtains.
10. the application of cationic silicone pickering emulsion according to claim 9 in paint field.
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