CN109485864A - A kind of acrylic emulsion and preparation method thereof having both lockedin air space Yu wet covering - Google Patents
A kind of acrylic emulsion and preparation method thereof having both lockedin air space Yu wet covering Download PDFInfo
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- CN109485864A CN109485864A CN201811089907.4A CN201811089907A CN109485864A CN 109485864 A CN109485864 A CN 109485864A CN 201811089907 A CN201811089907 A CN 201811089907A CN 109485864 A CN109485864 A CN 109485864A
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Abstract
The present invention discloses a kind of acrylic emulsion for having both lockedin air space Yu wet covering, belongs to acrylic emulsion field, in parts by mass, including following components: 150-210 parts of water, 75-85 parts of styrene, 10-20 parts of methyl methacrylate, 3-10 parts of methacrylic acid, 1-5 parts of anion emulsifier, 30-50 parts of neutralizer, 25-300 parts of modified inorganic object, 0.2-1 parts of initiator, 0.5-1.0 parts of oxidant, 0.5-1.0 parts of reducing agent.Acrylic emulsion provided by the invention, on with basic properties such as good lockedin air space, water resistance, weatherability, stain resistances, the wet covering performance of lotion is improved, the application property of coating is improved, and the basic property of lotion is got a qualitative improvement, product cost is greatly improved.
Description
Technical field
The present invention relates to a kind of acrylic emulsions and preparation method thereof for having both lockedin air space Yu wet covering, belong to acrylic acid
Lotion field.
Background technique
Aqueous acrylic emulsion is constructed after being configured to coating, since lotion itself is without wet covering, and in coating
Powder itself for it is wet cover have it is certain limiting, so in the construction process, construction personnel is worked as due to that can not distinguish
Whether forefoot area was painted or human factor thinks current region japanning amount is very few, will do it multiple construction, greatly unrestrained
The human resources and construction period of construction are taken.Further, since lotion does not have lockedin air space yet, therefore with a large amount of titanium in coating
White powder goes the covering for improving lotion to need to increase the dosage of titanium dioxide if expecting high covering system, leads to the ratio of titanium dioxide
Weight is high, and the higher cost of titanium dioxide, the cost of coating itself and itself specific gravity of coating is greatly improved, to make to construct
Difficulty increases.
There is a kind of covering emulsion on the market at present, it can be good at providing the lockedin air space of lotion, but in wet covering
Aspect, then absolutely not needed for effect.Therefore need to develop acrylic emulsion a kind of while that there is lockedin air space Yu wet covering, it is existing
In the market temporarily without the product of such function, how to realize aqueous acrylic emulsion while there is lockedin air space and wet covering
Property, it is one of technical problem of current emulsion industry.
Summary of the invention
In view of the above existing problems in the prior art, the present invention provides a kind of acrylic acid for having both lockedin air space Yu wet covering
Lotion, can improve lotion lockedin air space and wet covering, improve the application property of coating.
The present invention goes back while providing the preparation method of above-mentioned acrylic emulsion.
To achieve the goals above, a kind of acrylic emulsion for having both lockedin air space Yu wet covering that the present invention uses, is pressed
Mass parts meter, including following components: 150-210 parts of water, 75-85 parts of styrene, 10-20 parts of methyl methacrylate, methyl-prop
3-10 parts of olefin(e) acid, 1-5 parts of anion emulsifier, 30-50 parts of neutralizer, 25-300 parts of modified inorganic object, 0.2-1 parts of initiator,
0.5-1.0 parts of oxidant, 0.5-1.0 parts of reducing agent.
As an improvement, the anion emulsifier is using one in lauryl sodium sulfate or neopelex
It plants or two kinds is mixed with arbitrary proportion.
As an improvement, the neutralizer use concentration for 28% ammonium hydroxide, concentration be 5% sodium hydroxide or concentration be
One kind or mentioned component of 50% organic amine are mixed with arbitrary proportion.
As an improvement, the modified inorganic object is modified Nano silica solution, modified Nano Aluminum sol, modified nano-meter caco 3
One of calcium, modified nano-titanium dioxide or mentioned component are mixed with arbitrary proportion.
As an improvement, the initiator is one of sodium peroxydisulfate, ammonium persulfate, potassium peroxydisulfate or mentioned component to appoint
The mixing of meaning ratio.
As an improvement, the oxidant uses organic peroxide.
As an improvement, the reducing agent is one of nitrous acid hydrogen sodium or vitamin C or mentioned component with arbitrary proportion
Mixing.
In addition, the present invention also provides a kind of preparation methods of acrylic emulsion, comprising the following steps:
1) pre-emulsion a: under normal temperature and pressure, 0.5-3 parts of anion emulsifiers, 10-15 parts of water are mixed in pre-emulsification cylinder
It closes, dissolution is sufficiently stirred, and sequentially add the methyl methacrylate of formula ratio, methacrylic acid, obtains pre-emulsion a；
2) polymer fluid a: 80-100 parts of water are added in the bottom of reaction kettle, is warming up to 70-80 DEG C, stirs 20-40 minutes, take
Then pre-emulsion a obtained by 5%-10% step 1) takes 0.1-0.2 parts as seed emulsion, disposable investment reaction kettle bottom
Initiator disposably puts into bottom, reacts and keeps the temperature 10-30 minutes, and after seed emulsion is formed, remaining step 1 is added dropwise respectively)
A and 0.05-0.6 parts of initiators of gained pre-emulsion, time for adding are 90-150 minutes, and reaction temperature is 80-90 DEG C, heat preservation
30-60 minutes；
3) pre-emulsion b: under normal temperature and pressure, 0.5-2 parts of anion emulsifiers, 20-25 parts of water are mixed in pre-emulsification cylinder
It closes, dissolution is sufficiently stirred, and the styrene of formula ratio is added, obtains pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 80-90 DEG C, a dropping step 3) b and 0.05-0.2 parts of pre-emulsion initiations of gained
Agent, time for adding are 150-210 minutes, and reaction temperature is 85-95 DEG C；
5) it is swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 20-40 points
Clock carries out heat preservation 20-40 minutes after being added dropwise to complete；
6) it is grafted: being cooled to 65-75 DEG C, after dripping, while use is added dropwise in the disposable modified inorganic object for putting into formula ratio
0.4-0.8 part oxidant of 15-25 parts of water dissolution and the 0.4-0.8 part reducing agent dissolved with 15-25 parts of water, time for adding are
30-60 minutes, after completion of dropwise addition, keep the temperature 20-40 minutes；
7) it eliminates afterwards: after heat preservation, being cooled to 60-70 DEG C, while the 0.1-0.2 part oxygen dissolved with 5-10 parts of water is added dropwise
Agent and the 0.1-0.2 part reducing agent dissolved with 5-10 parts of water, time for adding are 20-40 minutes, after completion of dropwise addition, keep the temperature 20-
40 minutes, it is cooled to 45-50 DEG C, up to the acrylic emulsion after filtering.
As an improvement, the solid content that acrylic emulsion is made is 30-60%.The pH that acrylic emulsion is made is 6-8.It is made
The partial size of acrylic emulsion is 400-600 nanometers.
Compared with prior art, the beneficial effects of the present invention are:
1, acrylic emulsion provided by the invention, with good lockedin air space, water resistance, weatherability, stain resistance etc.
On basic property, the wet covering performance of lotion is improved, improves the application property of coating, and the basic property of lotion is obtained
To the raising of matter, product cost is greatly improved.
It 2,, can using the polymerization technique of graft modification inorganic matter in acrylic emulsion preparation method provided by the invention
Preferably make working on emulsion particle surface for modified inorganic object orientation, when emulsion particle is in film forming matter, modified inorganic object
It can be directionally arranged in emulsion particle surface, emulsion film when hygrometric state, inject in liquid phase from air, when touching by light
When modified inorganic object, light is reflected, due to light refraction difference, so that the wet covering of lotion has obtained significantly
It is promoted.
3, in acrylic emulsion preparation method provided by the invention, using the polymerization technique being continuously added dropwise, the ruler of emulsion particle
Very little distribution is wide, and polymer composition does not change at any time when copolymerization, and polymerization system heat and quality are stablized.
4, in acrylic emulsion preparation method provided by the invention, technique is eliminated after the later period of lotion preparation introduces, it can
In the case where initiator or other auxiliary agents are intervened, react the monomer to dissociate when emulsion polymerization sufficiently.
Detailed description of the invention
Fig. 1 is lockedin air space schematic diagram at 25 DEG C of the embodiment of the present invention；
Fig. 2 is lockedin air space schematic diagram at 50 DEG C of the embodiment of the present invention；
Fig. 3 is the wet covering schematic diagram of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention is carried out below further detailed
It describes in detail bright.However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, it is not limited to this hair
Bright range.
Unless otherwise defined, all technical terms and scientific terms used herein are led with technology of the invention is belonged to
The normally understood meaning of the technical staff in domain is identical, and term as used herein in the specification of the present invention is intended merely to retouch
State the purpose of specific embodiment, it is not intended that in the limitation present invention.
A kind of acrylic emulsion having both lockedin air space Yu wet covering, in parts by mass, including following components: water 150-
210 parts, 75-85 parts of styrene, 10-20 parts of methyl methacrylate, 3-10 parts of methacrylic acid, 1-5 parts of anion emulsifier,
30-50 parts of neutralizer, 25-300 parts of modified inorganic object, 0.2-1 parts of initiator, 0.5-1.0 parts of oxidant, reducing agent 0.5-1.0
Part.
The present invention is arranged in pairs or groups using the monomer of different performance and is used, and while guaranteeing the basic performance of product, is changed by grafting
Property inorganic matter method, preferably make modified inorganic object orient in emulsion particle surface alignment, when emulsion particle is in film forming matter
When, modified inorganic object can directionally be arranged in emulsion particle surface, and for emulsion film when hygrometric state, light injects liquid from air
Xiang Zhong, when touching modified inorganic object, light is reflected, due to light refraction difference, so that the wet covering of lotion
Property is obviously improved.And modified inorganic object space face, since modified inorganic object is obtained by the modification to inorganic matter,
Therefore the inorganic matter is also equipped with the characteristic of inorganic matter while can be grafted with organic matter, therefore modified inorganic object is connect
After branch is into lotion, which is the special material for integrating organic structure Yu inorganic structure.
As an improvement, the anion emulsifier is using one in lauryl sodium sulfate or neopelex
It plants or two kinds is mixed with arbitrary proportion.Above-mentioned sodium salt has stronger polarity, and the polymerization of emulsifier in the course of the polymerization process can be improved
Efficiency improves dispersibility of the monomer in water-based system.
As an improvement, the neutralizer use concentration for 28% ammonium hydroxide, concentration be 5% sodium hydroxide or concentration be
One kind or mentioned component of 50% organic amine are mixed with arbitrary proportion.
As an improvement, the modified inorganic object is modified Nano silica solution, modified Nano Aluminum sol, modified nano-meter caco 3
One of calcium, modified nano-titanium dioxide or mentioned component are mixed with arbitrary proportion.Above-mentioned modified inorganic object is selected, due to receiving
For rice inorganic matter in hygrometric state, the influence to light is bigger, for other some organic matters, nano-inorganic substance due to
The refractive index of itself is relatively high, therefore in hygrometric state, and emulsion film or paint film can be made to greatly improve system to light
Refracting power.Therefore modified inorganic object product in, not only contain organic structure, but also contain inorganic structure, this collection organic structure and
The special material of inorganic structure, there is performance advantage outstanding in terms of wet covering.
As an improvement, the initiator is one of sodium peroxydisulfate, ammonium persulfate, potassium peroxydisulfate or mentioned component to appoint
The mixing of meaning ratio.Persulfate is heated easily to resolve into free radical, and free radical can be produced with active double bond in the reaction system
The reactions such as raw free radical grafting, copolymerization, crosslinking, make lotion form reticular structure after coating, improve the mechanical property of film.
As an improvement, the oxidant uses organic peroxide.The reducing agent is in nitrous acid hydrogen sodium or vitamin C
One kind or mentioned component mixed with arbitrary proportion.Organic peroxide itself has alkalescent, and nitrous acid hydrogen sodium, vitamin
C is weakly acidic.The addition of oxidant and reducing agent, can further stable chemical reaction system acid-base balance, being conducive to
Stablizing for reaction is learned to carry out.
In addition, the present invention also provides a kind of preparation methods of acrylic emulsion, comprising the following steps:
1) pre-emulsion a: under normal temperature and pressure, 0.5-3 parts of anion emulsifiers, 10-15 parts of water are mixed in pre-emulsification cylinder
It closes, dissolution is sufficiently stirred, and sequentially add the methyl methacrylate of formula ratio, methacrylic acid, obtains pre-emulsion a；
2) polymer fluid a: 80-100 parts of water are added in the bottom of reaction kettle, is warming up to 70-80 DEG C, stirs 20-40 minutes, take
Then pre-emulsion a obtained by 5%-10% step 1) takes 0.1-0.2 parts as seed emulsion, disposable investment reaction kettle bottom
Initiator disposably puts into bottom, reacts and keeps the temperature 10-30 minutes, and after seed emulsion is formed, remaining step 1 is added dropwise respectively)
A and 0.05-0.6 parts of initiators of gained pre-emulsion, time for adding are 90-150 minutes, and reaction temperature is 80-90 DEG C, heat preservation
30-60 minutes；
3) pre-emulsion b: under normal temperature and pressure, 0.5-2 parts of anion emulsifiers, 20-25 parts of water are mixed in pre-emulsification cylinder
It closes, dissolution is sufficiently stirred, and the styrene of formula ratio is added, obtains pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 80-90 DEG C, a dropping step 3) b and 0.05-0.2 parts of pre-emulsion initiations of gained
Agent, time for adding are 150-210 minutes, and reaction temperature is 85-95 DEG C；
5) it is swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 20-40 points
Clock carries out heat preservation 20-40 minutes after being added dropwise to complete；
6) it is grafted: being cooled to 65-75 DEG C, after dripping, while use is added dropwise in the disposable modified inorganic object for putting into formula ratio
0.4-0.8 part oxidant of 15-25 parts of water dissolution and the 0.4-0.8 part reducing agent dissolved with 15-25 parts of water, time for adding are
30-60 minutes, after completion of dropwise addition, keep the temperature 20-40 minutes；
7) it eliminates afterwards: after heat preservation, being cooled to 60-70 DEG C, while the 0.1-0.2 part oxygen dissolved with 5-10 parts of water is added dropwise
Agent and the 0.1-0.2 part reducing agent dissolved with 5-10 parts of water, time for adding are 20-40 minutes, after completion of dropwise addition, keep the temperature 20-
40 minutes, it is cooled to 45-50 DEG C, up to the acrylic emulsion after filtering.
As an improvement, the solid content that acrylic emulsion is made is 30-60%.The pH that acrylic emulsion is made is 6-8.It is made
The partial size of acrylic emulsion is 400-600 nanometers.
Embodiment 1
A kind of acrylic emulsion having both lockedin air space Yu wet covering, in parts by mass, including following components: 150 parts of water,
75 parts of styrene, 10 parts of methyl methacrylate, 3 parts of methacrylic acid, 1 part of anion emulsifier, 30 parts of neutralizer, modified nothing
25 parts of machine object, 0.2 part of initiator, 0.5 part of oxidant, 0.5 part of reducing agent.
The anion emulsifier uses lauryl sodium sulfate.The neutralizer use concentration for 28% ammonia
Water.
The modified inorganic object is modified Nano silica solution.The initiator is sodium peroxydisulfate.
The oxidant uses organic peroxide.The reducing agent is nitrous acid hydrogen sodium.
The preparation method of the acrylic emulsion, comprising the following steps:
1) pre-emulsion a: under normal temperature and pressure, 0.5 part of anion emulsifier, 10 parts of water is mixed in pre-emulsification cylinder, are filled
Divide stirring and dissolving, and sequentially add the methyl methacrylate of formula ratio, methacrylic acid, obtains pre-emulsion a；
2) polymer fluid a: 80 parts of water are added in the bottom of reaction kettle, is warming up to 70 DEG C, stirs 20 minutes, take 5% step 1)
Then gained pre-emulsion a takes 0.1 part of initiator, disposably puts into kettle as seed emulsion, disposable investment reaction kettle bottom
Bottom reacts and keeps the temperature 10 minutes, and after seed emulsion is formed, remaining step 1 is added dropwise respectively) gained pre-emulsion a and 0.05 part
Initiator, time for adding are 90 minutes, and reaction temperature is 80 DEG C, keep the temperature 30 minutes；
3) pre-emulsion b: under normal temperature and pressure, 0.5 part of anion emulsifier, 20 parts of water is mixed in pre-emulsification cylinder, are filled
Divide stirring and dissolving, and the styrene of formula ratio is added, obtains pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 80 DEG C, a dropping step 3) gained pre-emulsion b and 0.05 part of initiator, it is added dropwise
Time is 150 minutes, and reaction temperature is 85 DEG C；
5) it being swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 20 minutes,
Heat preservation 20 minutes is carried out after being added dropwise to complete；
6) it is grafted: being cooled to 65 DEG C, the disposable modified inorganic object for putting into formula ratio after dripping, while being added dropwise with 15
0.4 part of oxidant of part water dissolution and the 0.4 part of reducing agent dissolved with 15 parts of water, time for adding are 30 minutes, after completion of dropwise addition,
Heat preservation 20 minutes；
7) it eliminates afterwards: after heat preservation, being cooled to 60 DEG C, while the 0.1 part of oxidant dissolved with 5 parts of water is added dropwise and with 5
0.1 part of reducing agent of part water dissolution, time for adding are 20 minutes, after completion of dropwise addition, keep the temperature 20 minutes, are cooled to 45 DEG C, filtering
Afterwards up to the acrylic emulsion.
The solid content that acrylic emulsion is made is 42.6%.The pH that acrylic emulsion is made is 6.5.Acrylic emulsion is made
Partial size be 420-450 nanometers.
Embodiment 2
A kind of acrylic emulsion having both lockedin air space Yu wet covering, in parts by mass, including following components: 180 parts of water,
80 parts of styrene, 15 parts of methyl methacrylate, 6 parts of methacrylic acid, 3 parts of anion emulsifier, 40 parts of neutralizer, modified nothing
150 parts of machine object, 0.6 part of initiator, 0.75 part of oxidant, 0.75 part of reducing agent.
The anion emulsifier uses neopelex.The neutralizer use concentration for 5% hydrogen
Sodium oxide molybdena.
The modified inorganic object is modified Nano Aluminum sol.The initiator is ammonium persulfate.
The oxidant uses organic peroxide.The reducing agent is nitrous acid hydrogen sodium.
The preparation method of the acrylic emulsion, comprising the following steps:
1) pre-emulsion a: under normal temperature and pressure, 1.5 parts of anion emulsifiers, 12.5 parts of water being mixed in pre-emulsification cylinder,
Dissolution is sufficiently stirred, and sequentially adds the methyl methacrylate of formula ratio, methacrylic acid, obtains pre-emulsion a；
2) polymer fluid a: 90 parts of water are added in the bottom of reaction kettle, is warming up to 75 DEG C, stirs 30 minutes, take 7% step 1)
Then gained pre-emulsion a takes 0.15 part of initiator as seed emulsion, disposable investment reaction kettle bottom, disposable to put into
Bottom reacts and keeps the temperature 20 minutes, and after seed emulsion is formed, remaining step 1 is added dropwise respectively) gained pre-emulsion a and 0.3 part
Initiator, time for adding are 120 minutes, and reaction temperature is 85 DEG C, keep the temperature 45 minutes；
3) pre-emulsion b: under normal temperature and pressure, 1.5 parts of anion emulsifiers, 22.5 parts of water being mixed in pre-emulsification cylinder,
Dissolution is sufficiently stirred, and the styrene of formula ratio is added, obtains pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 85 DEG C, a dropping step 3) gained pre-emulsion b and 0.15 part of initiator, it is added dropwise
Time is 180 minutes, and reaction temperature is 90 DEG C；
5) it being swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 30 minutes,
Heat preservation 30 minutes is carried out after being added dropwise to complete；
6) it is grafted: being cooled to 70 DEG C, the disposable modified inorganic object for putting into formula ratio after dripping, while being added dropwise with 20
0.6 part of oxidant of part water dissolution and the 0.6 part of reducing agent dissolved with 20 parts of water, time for adding are 45 minutes, after completion of dropwise addition,
Heat preservation 30 minutes；
7) afterwards eliminate: after heat preservation, be cooled to 65 DEG C, at the same be added dropwise with 7.5 parts of water dissolve 0.15 part of oxidant and
The 0.15 part of reducing agent dissolved with 7.5 parts of water, time for adding are 30 minutes, after completion of dropwise addition, keep the temperature 30 minutes, are cooled to 48
DEG C, up to the acrylic emulsion after filtering.
As an improvement, the solid content that acrylic emulsion is made is 37%.The pH that acrylic emulsion is made is 6.5.It is made third
The partial size of olefin(e) acid lotion is 430-460 nanometers.
Embodiment 3
A kind of acrylic emulsion having both lockedin air space Yu wet covering, in parts by mass, including following components: 210 parts of water,
It is 85 parts of styrene, 20 parts of methyl methacrylate, 10 parts of methacrylic acid, 5 parts of anion emulsifier, 50 parts of neutralizer, modified
300 parts of inorganic matter, 1 part of initiator, 1.0 parts of oxidant, 1.0 parts of reducing agent.
The anion emulsifier uses lauryl sodium sulfate.The neutralizer use concentration for 50% it is organic
Amine.
The modified inorganic object is modified nano calcium carbonate.The initiator is potassium peroxydisulfate.
The oxidant uses organic peroxide.The reducing agent is nitrous acid hydrogen sodium.
A kind of preparation method of the acrylic emulsion, comprising the following steps:
1) pre-emulsion a: under normal temperature and pressure, 3 parts of anion emulsifiers, 15 parts of water are mixed in pre-emulsification cylinder, sufficiently
Stirring and dissolving, and the methyl methacrylate of formula ratio, methacrylic acid are sequentially added, obtain pre-emulsion a；
2) polymer fluid a: 100 parts of water are added in the bottom of reaction kettle, is warming up to 80 DEG C, stirs 40 minutes, take 10% step
1) then gained pre-emulsion a takes 0.2 part of initiator as seed emulsion, disposable investment reaction kettle bottom, disposable to put into
Bottom reacts and keeps the temperature 30 minutes, and after seed emulsion is formed, remaining step 1 is added dropwise respectively) gained pre-emulsion a and 0.6 part
Initiator, time for adding are 150 minutes, and reaction temperature is 90 DEG C, keep the temperature 60 minutes；
3) pre-emulsion b: under normal temperature and pressure, 2 parts of anion emulsifiers, 25 parts of water are mixed in pre-emulsification cylinder, sufficiently
Stirring and dissolving, and the styrene of formula ratio is added, obtain pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 90 DEG C, a dropping step 3) gained pre-emulsion b and 0.2 part of initiator, it is added dropwise
Time is 210 minutes, and reaction temperature is 95 DEG C；
5) it being swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 40 minutes,
Heat preservation 40 minutes is carried out after being added dropwise to complete；
6) it is grafted: being cooled to 75 DEG C, the disposable modified inorganic object for putting into formula ratio after dripping, while being added dropwise with 25
0.8 part of oxidant of part water dissolution and the 0.8 part of reducing agent dissolved with 25 parts of water, time for adding are 60 minutes, after completion of dropwise addition,
Heat preservation 40 minutes；
7) it eliminates afterwards: after heat preservation, being cooled to 70 DEG C, while the 0.2 part of oxidant dissolved with 10 parts of water and use is added dropwise
0.2 part of reducing agent of 10 parts of water dissolution, time for adding are 40 minutes, after completion of dropwise addition, keep the temperature 40 minutes, are cooled to 50 DEG C, mistake
Up to the acrylic emulsion after filter.
The solid content that acrylic emulsion is made is 53.7%.The pH that acrylic emulsion is made is 7.8.Acrylic emulsion is made
Partial size be 584 nanometers.
Embodiment 4
A kind of acrylic emulsion having both lockedin air space Yu wet covering, in parts by mass, including following components: 200 parts of water,
80 parts of styrene, 18 parts of methyl methacrylate, 8 parts of methacrylic acid, 4 parts of anion emulsifier, 45 parts of neutralizer, modified nothing
250 parts of machine object, 0.8 part of initiator, 0.8 part of oxidant, 0.8 part of reducing agent.
As an improvement, the anion emulsifier uses neopelex.The neutralizer uses concentration
For 28% ammonium hydroxide.The modified inorganic object is modified nano calcium carbonate.The initiator is sodium peroxydisulfate.
The oxidant uses organic peroxide.The reducing agent is nitrous acid hydrogen sodium.
The preparation method of the acrylic emulsion, comprising the following steps:
1) pre-emulsion a: under normal temperature and pressure, 2 parts of anion emulsifiers, 10 parts of water are mixed in pre-emulsification cylinder, sufficiently
Stirring and dissolving, and the methyl methacrylate of formula ratio, methacrylic acid are sequentially added, obtain pre-emulsion a；
2) polymer fluid a: 95 parts of water are added in the bottom of reaction kettle, is warming up to 78 DEG C, stirs 35 minutes, take 8% step 1)
Then gained pre-emulsion a takes 0.1 part of initiator, disposably puts into kettle as seed emulsion, disposable investment reaction kettle bottom
Bottom reacts and keeps the temperature 15 minutes, after seed emulsion is formed, respectively be added dropwise remaining step 1) gained pre-emulsion a and 0.6 part draw
Agent is sent out, time for adding is 120 minutes, and reaction temperature is 85 DEG C, keeps the temperature 45 minutes；
3) pre-emulsion b: under normal temperature and pressure, 2 parts of anion emulsifiers, 25 parts of water are mixed in pre-emulsification cylinder, sufficiently
Stirring and dissolving, and the styrene of formula ratio is added, obtain pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 88 DEG C, a dropping step 3) gained pre-emulsion b and 0.1 part of initiator, it is added dropwise
Time is 200 minutes, and reaction temperature is 90 DEG C；
5) it being swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 30 minutes,
Heat preservation 40 minutes is carried out after being added dropwise to complete；
6) it is grafted: being cooled to 68 DEG C, the disposable modified inorganic object for putting into formula ratio after dripping, while being added dropwise with 25
0.7 part of oxidant of part water dissolution and the 0.7 part of reducing agent dissolved with 25 parts of water, time for adding are 50 minutes, after completion of dropwise addition,
Heat preservation 35 minutes；
7) it eliminates afterwards: after heat preservation, being cooled to 65 DEG C, while the 0.1 part of oxidant dissolved with 10 parts of water and use is added dropwise
0.1 part of reducing agent of 10 parts of water dissolution, time for adding are 35 minutes, after completion of dropwise addition, keep the temperature 30 minutes, are cooled to 45 DEG C, mistake
Up to the acrylic emulsion after filter.
As an improvement, the solid content that acrylic emulsion is made is 49.7%.The pH that acrylic emulsion is made is 7.2.It is made
The partial size of acrylic emulsion is 435-450 nanometers.
Acrylic emulsion made from above-described embodiment 1-4 carries out 25 DEG C of lockedin air spaces, 50 DEG C of lockedin air spaces and wet covering respectively and surveys
Examination, specific test result is as shown in Figure 1, Figure 2 and Figure 3, and wherein A represents embodiment 1, and B represents embodiment 2, and C represents embodiment 3,
D represents embodiment 4.
In addition, the lockedin air space of acrylic emulsion made from 1-4 of the embodiment of the present invention and wet coverage data such as the following table 1.This hair
Viscosity change such as the following table 2 after the storage of acrylic emulsion heat made from bright embodiment 1-4.
The coverage data of acrylic emulsion made from 1 embodiment of table
| Sample | 25 DEG C of lotion lockedin air space/% | 50 DEG C of lotion lockedin air space/% | Wet covering/the % of lotion |
| A | 43.2 | 47.4 | 31.5 |
| B | 48.0 | 52.6 | 42.4 |
| C | 59.3 | 64.0 | 61.5 |
| D | 45.3 | 48.9 | 36.7 |
Viscosity change after acrylic emulsion heat storage in 14 days made from 2 embodiment of table
| Sample | Initial viscosity/Ku | Viscosity/Ku after heat storage 14 days |
| A | 44.0 | 43.6 |
| B | 46.6 | 46.6 |
| C | 53.0 | 53.3 |
| D | 44.6 | 45.0 |
Acrylic emulsion provided by the invention, with bases such as good lockedin air space, water resistance, weatherability, stain resistances
In plinth performance, the wet covering performance of lotion is improved, improves the application property of coating, and the basic property of lotion is obtained
The raising of matter, greatly improves product cost.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (11)
1. a kind of acrylic emulsion for having both lockedin air space Yu wet covering, which is characterized in that in parts by mass, including with the following group
Point: 150-210 parts of water, 75-85 parts of styrene, 10-20 parts of methyl methacrylate, 3-10 parts of methacrylic acid, anion cream
1-5 parts of agent, 30-50 parts of neutralizer, 25-300 parts of modified inorganic object, 0.2-1 parts of initiator, 0.5-1.0 parts of oxidant, reduction
0.5-1.0 parts of agent.
2. a kind of acrylic emulsion for having both lockedin air space Yu wet covering according to claim 1, which is characterized in that described
Anion emulsifier use one or both of lauryl sodium sulfate or neopelex mixed with arbitrary proportion
It closes.
3. a kind of acrylic emulsion for having both lockedin air space Yu wet covering according to claim 1, which is characterized in that described
Neutralizer use concentration for 28% ammonium hydroxide, concentration be 5% sodium hydroxide or concentration be 50% organic amine one kind or
Mentioned component is mixed with arbitrary proportion.
4. a kind of acrylic emulsion for having both lockedin air space Yu wet covering according to claim 1, which is characterized in that described
Modified inorganic object is modified Nano silica solution, in modified Nano Aluminum sol, modified nano calcium carbonate, modified nano-titanium dioxide
A kind of or mentioned component is mixed with arbitrary proportion.
5. a kind of acrylic emulsion for having both lockedin air space Yu wet covering according to claim 1, which is characterized in that described
Initiator is that one of sodium peroxydisulfate, ammonium persulfate, potassium peroxydisulfate or mentioned component are mixed with arbitrary proportion.
6. a kind of acrylic emulsion for having both lockedin air space Yu wet covering according to claim 1, which is characterized in that described
Oxidant uses organic peroxide.
7. a kind of acrylic emulsion for having both lockedin air space Yu wet covering according to claim 1, which is characterized in that described
Reducing agent is that one of nitrous acid hydrogen sodium or vitamin C or mentioned component are mixed with arbitrary proportion.
8. a kind of preparation method of any one of claim 1-7 acrylic emulsion, which comprises the following steps:
1) pre-emulsion a: under normal temperature and pressure, 0.5-3 parts of anion emulsifiers, 10-15 parts of water is mixed in pre-emulsification cylinder, are filled
Divide stirring and dissolving, and sequentially add the methyl methacrylate of formula ratio, methacrylic acid, obtains pre-emulsion a；
2) polymer fluid a: 80-100 parts of water are added in the bottom of reaction kettle, is warming up to 70-80 DEG C, stirs 20-40 minutes, take 5%-
Then pre-emulsion a obtained by 10% step 1) takes 0.1-0.2 parts of initiations as seed emulsion, disposable investment reaction kettle bottom
Agent disposably puts into bottom, reacts and keeps the temperature 10-30 minutes, and after seed emulsion is formed, remaining step 1 is added dropwise respectively) gained
A and 0.05-0.6 parts of initiators of pre-emulsion, time for adding are 90-150 minutes, and reaction temperature is 80-90 DEG C, keep the temperature 30-60
Minute；
3) pre-emulsion b: under normal temperature and pressure, 0.5-2 parts of anion emulsifiers, 20-25 parts of water is mixed in pre-emulsification cylinder, are filled
Divide stirring and dissolving, and the styrene of formula ratio is added, obtains pre-emulsion b；
4) polymer fluid b: reaction kettle is warming up to 80-90 DEG C, a dropping step 3) gained b and 0.05-0.2 parts of initiators of pre-emulsion,
Time for adding is 150-210 minutes, and reaction temperature is 85-95 DEG C；
5) it being swollen: after dripping pre-emulsion b, the neutralizer of formula ratio being added dropwise at 90 DEG C, time for adding is 20-40 minutes,
Heat preservation 20-40 minutes is carried out after being added dropwise to complete；
6) it is grafted: being cooled to 65-75 DEG C, the disposable modified inorganic object for putting into formula ratio after dripping, while being added dropwise and using 15-
0.4-0.8 part oxidant of 25 parts of water dissolution and the 0.4-0.8 part reducing agent dissolved with 15-25 parts of water, time for adding 30-60
Minute, after completion of dropwise addition, keep the temperature 20-40 minutes；
7) it eliminates afterwards: after heat preservation, being cooled to 60-70 DEG C, while the 0.1-0.2 part oxidant dissolved with 5-10 parts of water is added dropwise
With the 0.1-0.2 part reducing agent dissolved with 5-10 parts of water, time for adding is 20-40 minutes, after completion of dropwise addition, 20-40 points of heat preservation
Clock is cooled to 45-50 DEG C, up to the acrylic emulsion after filtering.
9. the preparation method of acrylic emulsion according to claim 8, which is characterized in that the solid content of acrylic emulsion is made
For 30-60%.
10. the preparation method of acrylic emulsion according to claim 8, which is characterized in that be made acrylic emulsion pH be
6-8。
11. the preparation method of acrylic emulsion according to claim 8, which is characterized in that the partial size of acrylic emulsion is made
It is 400-600 nanometers.
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| CN114195944A (en) * | 2021-11-12 | 2022-03-18 | 万华化学集团股份有限公司 | Seed emulsion of covering polymer and preparation process |
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