CN108976892A - A kind of surface modifier in automobile bloom finishing coat - Google Patents
A kind of surface modifier in automobile bloom finishing coat Download PDFInfo
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- CN108976892A CN108976892A CN201810679250.0A CN201810679250A CN108976892A CN 108976892 A CN108976892 A CN 108976892A CN 201810679250 A CN201810679250 A CN 201810679250A CN 108976892 A CN108976892 A CN 108976892A
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- surface modifier
- finishing coat
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- average molecular
- automobile
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses the surface modifiers in a kind of automobile bloom finishing coat, belong to coating additive field.The present invention uses acrylic acid, the monomers such as butyl acrylate are prepared into polyacrylate polymers, the polymer for using polyether segment and dimethyl silicone polymer to be polymerized is interfacial agent, the surface modifier in automobile bloom finishing coat can be obtained after interfacial agent and polyacrylate polymers are mixed, the surface modifier is as clear as crystal, low-viscosity (mobile) liquid, addition is in coating, it acts on the levelability and gloss that can effectively promote automobile bloom finishing coat film, prevents the generation of blistering, pin hole, prickly heat.
Description
Technical field
The invention belongs to coating additive fields, and in particular to the surface modifier in a kind of automobile bloom finishing coat.
Background technique
Automobile bloom finishing coat is also easy to produce the surfaces such as bubble, pin hole, prickly heat and lacks in the construction environment of summer high temperature high humidity
It falls into, influences the appearance of body of a motor car.Existing solution technical method can such as be added by the adjustment of spraying application solvent or diluent, working viscosity
The higher boiling slow drying solvent of some such as DBE etc, the working viscosity of appropriate adjustment paint；The temperature and humidity of spray room is reduced, but is had
Client do not have this kind of condition, and the increase of construction cost can be caused.Even with the above measure, also cannot thoroughly solve
Above-mentioned problem, such as may result in the decline of vehicle body gloss of film, richness, and when spraying is also easy to produce sagging, cost increases
Add.By adding some conven-tional adjuvants, it is functional it is single, there are the risks of safety etc., easily cause the rising of cost,
The above way is not perfect solution.Therefore a kind of solution that effect is good, simple and easy, without side-effects is found,
It is necessary to.
The present invention will thoroughly solve automobile bloom finishing coat in the construction environment of summer high temperature high humidity, be also easy to produce bubble, needle
The surface defects such as hole, prickly heat, again convenient for construction, simple and easy, phenomena such as sagging, loss of gloss will not be caused, safety and stability, and not
It can cause the rising of cost.
Car paint bloom finishing coat is also easy to produce the surfaces such as bubble, pin hole, prickly heat in the construction environment of summer high temperature high humidity
Defect influences the appearance of body of a motor car.After the completion of coating application, in the drying process, solvent, moisture and air meeting in paint film
Gradually to surface migration and volatilize.In this process, the variation of surface of the paint film can be such a process: generation bubble~
~~~bubble-break~~~paint film levelling again.If the surface drying speed of paint film is too fast, solvent, moisture and air can not and
When volatilize away, or after volatilizing away paint film can not levelling again, then will be formed in surface of the paint film one layer fine and close small
Bubble, these minute bubbles are exactly prickly heat, i.e. the origin cause of formation of prickly heat.Existing common solution: 1. some DBE etc. can be added high boiling
Point solvent, slows down the surface evaporation rate of paint.2. reducing the working viscosity of paint.3. trying the temperature at reduction spraying application scene
Humidity.4. using some auxiliary agents are added.
Some problems existing for existing method: 1. may generate the dark bubble of paint surface of the paint film, when spraying easy sagging.②
The glossiness of paint film, richness can be declined.3. client does not have the condition for the temperature and humidity for changing construction site, easily cause to apply
The rising of work cost.4. some auxiliary agents, there are security risk, such as storage stability, scene is not easy agitation and dilution, side effect, at
This rising etc..
The surface modifier of conventional commercial, such as the Levelol TSP levelling agent with DEUCHEM production, the auxiliary agent is by higher boiling
Compound is formed with particular interface activating agent, can be promoted the levelling of paint film and be prevented the generation of bubble, pin hole, additive amount is
Full dose addition 2~5%.And surface modifier of the present invention is in contrast, have with better function, levelling light enhancing effect more
The advantage good, dosage is few, economical and practical.
Summary of the invention
The targeted technical problem of the present invention are as follows: some as secretly steeped, sagging, the table of prickly heat can be generated by 1. painting surface of the paint film
Planar defect.2. the glossiness of paint film, richness have impacted.3. causing the rising of client cost.4. in terms of storage, construction
Problem.
In order to reach easy for construction, safe and efficient, the better purpose of effect, the present invention is passed through and the technology in relation to R&D institution
Cooperation, searched out it is a kind of improve effective surface addition auxiliary agent, which is solvent type surface modifier.Add this auxiliary agent
Afterwards, it sprays and evaluates through curstomer's site, effect is perfect.
The specific technical proposal is:
Solvent type surface modifier in a kind of automobile bloom finishing coat, which is characterized in that the surface modifier is by quality
Percentages are made of 20~40% polyacrylate polymers and 60~80% interfacial agent.
The specific synthetic method of polyacrylate polymers are as follows: by mass percentage, weigh respectively acrylic acid 0~
2%, butyl acrylate 45~55%, hydroxy-ethyl acrylate 1~3%.Monomer is passed through dropwise addition side by ethyl acrylate 40~50%
Formula carries out polymerization reaction under initiator, and reaction temperature is 80~90 DEG C, and the reaction time is 5~8 hours, reacts 5~8 hours,
Discharge to obtain polyacrylate polymers after reaction；The initiator is dibenzoyl peroxide or azodiisobutyronitrile；
Solvent is toluene, dimethylbenzene, hexamethylene.
Control reaction obtains the polyacrylate polymers that molecular weight is 2000~6000, and control polyacrylate is birdsed of the same feather flock together
Adduct molecule amount makes its good fluidity not generate dark bubble, sagging, the side effects such as prickly heat after addition is in automobile finish.
The interfacial agent is granule surface contral auxiliary agent, be by number-average molecular weight be 5800~10000, weight average molecular weight
It is 1800~5500 for 6000~12000 polyether segment and number-average molecular weight, weight average molecular weight is poly- the two of 2000~6000
Methylsiloxane is formed by connecting.The granule surface contral auxiliary agent of formation can effectively promote the levelability and light of automobile bloom finishing coat film
Damp degree, help solves the problems, such as force drying easily " quick-fried bubble ", and the storage stability of auxiliary agent can be improved, and reaches skill of the invention
Art effect.
Polyacrylate polymers and interfacial agent are stirred to 15 minutes under 1000~1200 revs/min of revolving speeds i.e.
Surface modifier can be obtained.
Surface modifier of the present invention is obtained according to above-mentioned technical proposal, sprays scene in client, is made with same white finishing coat
Contrast test.In same paint, same amount and similar vehicle, in identical construction environment, the vehicle body cover of this auxiliary agent is added in detection discovery
Paint, integral body find no the surface defects such as bubble, pin hole, prickly heat, and integral body richness, brightness, which have, significantly to be mentioned
Height, its glossiness averagely improves 2~3 percentage points after detecting finishing coat, and integral body finishing coat effect is better than not adding this auxiliary agent
Vehicle body finishing coat.
Beneficial effects of the present invention are as follows:
(1) surface modifier of the invention is made of polyacrylate polymers and interfacial agent, wherein polypropylene
The molecular weight of acid esters quasi polymer is 2000~6000, and interfacial agent is the polyether segment and specified molecular weight of specified molecular weight
Dimethyl silicone polymer be polymerized, the as clear as crystal liquid of the surface modifier obtained after mixing, have special fruit aroma, can
To apply in automobile bloom finishing coat, the storage stability of finishing coat not only can be improved, can also effectively promote automobile bloom finishing coat
The levelability and glossiness of film, and it effectively prevent the generation of blistering, pin hole, prickly heat；
(2) using that can shorten the time of repose after baking finish sprays after surface modifier of the invention, help solves to force dry
The problem of dry easily " quick-fried bubble ", removes wet film and encounters moment pyrogenic blistering puzzlement, solves that spraying is blocked up and blistering
Problem.
Specific implementation method
Embodiment 1
(1) acrylic acid 1%, butyl acrylate 50%, hydroxy-ethyl acrylate 1% are weighed respectively.Ethyl acrylate 48% is single
Monomer is added drop-wise in solvent by body by dropwise addition mode, and polymerization reaction, reaction temperature are carried out under dibenzoyl peroxide initiator
Degree is 80~90 DEG C, and the reaction time is 5~8 hours, discharges after reaction, obtains polyacrylic acid of the molecular weight 2000~6000
Esters polymer；
It (2) is 5800~10000 by number-average molecular weight, the polyether segment and number that weight average molecular weight is 6000~12000 are equal
Molecular weight is 1800~5500, and the dimethyl silicone polymer that weight average molecular weight is 2000~6000 is polymerized, and obtains interfacial activity
Agent；
(3) by mass percentage, polyacrylate polymers 20% and interfacial agent 80% are weighed respectively,
Stirring 15 minutes under 1000 revs/min of revolving speeds can be obtained surface modifier.
Embodiment 2
(1) acrylic acid 1%, butyl acrylate 50%, hydroxy-ethyl acrylate 1% are weighed respectively.Ethyl acrylate 48% is single
Monomer is added drop-wise in solvent by dropwise addition mode, polymerization reaction, reaction temperature is carried out under azodiisobutyronitrile initiator by body
It is 80~90 DEG C, the reaction time is 5~8 hours, discharges after reaction, obtains polyacrylate of the molecular weight 2000~6000
Quasi polymer；
It (2) is 5800~10000 by number-average molecular weight, the polyether segment and number that weight average molecular weight is 6000~12000 are equal
Molecular weight is 1800~5500, and the dimethyl silicone polymer that weight average molecular weight is 2000~6000 is polymerized, and obtains interfacial activity
Agent；
(3) by mass percentage, polyacrylate polymers 30% and interfacial agent 70% are weighed respectively,
Stirring 15 minutes under 1100 revs/min of revolving speeds can be obtained surface modifier.
Embodiment 3
(1) acrylic acid 1%, butyl acrylate 50%, hydroxy-ethyl acrylate 1% are weighed respectively.Ethyl acrylate 48%, will
Monomer is added drop-wise in solvent by dropwise addition mode, and polymerization reaction, reaction temperature 80 are carried out under azodiisobutyronitrile initiator
~90 DEG C, the reaction time is 5~8 hours, is discharged after reaction, the polyacrylate for obtaining molecular weight 2000~6000 is birdsed of the same feather flock together
Close object；
It (2) is 5800~10000 by number-average molecular weight, the polyether segment and number that weight average molecular weight is 6000~12000 are equal
Molecular weight is 1800~5500, and the dimethyl silicone polymer that weight average molecular weight is 2000~6000 is polymerized, and obtains interfacial activity
Agent；
(3) by mass percentage, polyacrylate polymers 40% and interfacial agent 60% are weighed respectively,
Stirring 15 minutes under 1200 revs/min of revolving speeds can be obtained surface modifier.
The surface modifier that can obtain Examples 1 to 3 is directly added in paint, also may be added to paint thinner
In, it can first add, can also add later, be stirred in hand.Concrete application method:
One, it weighs: 1. painting in mass ratio: 100,2. surface modifier: 1~2, it is stirred evenly by hand after mixing.
Two, it weighs in mass ratio: 1. diluent: 100,2. surface modifier: 2~3, it is stirred evenly by hand after mixing.
Comparative example 1
(1) acrylic acid 2%, butyl acrylate 50% are weighed respectively, and ethyl acrylate 48% carries out monomer by being added dropwise
Polymerization reaction discharges after reaction, obtains polyacrylate polymers；
(2) interfacial agent is prepared, method is the same as embodiment 1；
(3) by mass percentage, polyacrylate polymers 20% and interfacial agent 80% are weighed respectively, will be claimed
The polyacrylate polymers and interfacial agent taken stir under 1000 revs/min of revolving speeds can be obtained surface in 15 minutes and helps
Agent.
Comparative example 2
(1) acrylic acid 1%, butyl acrylate 50%, hydroxy-ethyl acrylate 1% are weighed respectively.Ethyl acrylate 48% is single
Monomer is carried out polymerization reaction by being added dropwise, discharged after reaction, obtains the polyacrylate that molecular weight is greater than 6000 by body
Polymer；
(2) interfacial agent is prepared, method is the same as embodiment 1；
(3) by mass percentage, polyacrylate polymers 20% and interfacial agent 80% are weighed respectively,
Stirring 15 minutes under 1000 revs/min of revolving speeds can be obtained surface modifier.
Comparative example 3
(1) polyacrylate polymers are prepared, method is the same as embodiment 1；
(2) it is greater than 10000 by number-average molecular weight, weight average molecular weight is big greater than 12000 polyether segment and number-average molecular weight
In 5500, dimethyl silicone polymer of the weight average molecular weight greater than 6000 is polymerized, and obtains interfacial agent；
(3) by mass percentage, polyacrylate polymers 20% and interfacial agent 80% are weighed respectively,
Stirring 15 minutes under 1000 revs/min of revolving speeds can be obtained surface modifier.
The surface modifier of the surface modifier of Examples 1 to 3 and comparative example 1~3 is added in paint by requirement, is stirred
It is coated on substrate after mixing uniformly, forms the paint film that thickness is 60~65 μm.Blank control example: the paint of any auxiliary agent is not added
Diaphragm plate face.
It will obtain obtaining glossometer detection glossiness of the paint film using 60 degree of angles, observation surface of the paint film bubble, pin hole, prickly heat feelings
Condition.And tested after being stored 30 days, 30 days under conditions of 50+2 DEG C, testing result is as described in Table 1:
Table 1
Be added Examples 1 to 3 surface modifier surface of the paint film, after observation discovery addition this product after do not occur bubble,
Phenomena such as pin hole, prickly heat, coating are stablized without storage, are tested after 30 days, and the viscosity fineness of paint is unchanged, no precipitating knot
Block phenomenon, the bad problem of compatibility is not muddy, has using the effect for improving coating gloss, levelability, without side-effects.And it compares
The effect of this auxiliary agent is all not achieved in example 1~3.
The Levelol of surface modifier prepared by the embodiment of the present invention 1 and immediate existing product DEUCHEM production
TSP is compared, and is added in identical paint and is detected, testing result is as shown in table 2.
Table 2
As known from Table 2, this auxiliary agent is not only cheap compared with Levelol TSP product, and easy to operate, usage amount is few,
And it can achieve more excellent glossiness, better overall effect, storage stability is good, achieves weight in painted surface auxiliary agent field
Big technological break-through.
Claims (4)
1. the surface modifier in a kind of automobile bloom finishing coat, which is characterized in that the surface modifier by mass percentage, by
20~40% polyacrylate polymers and 60~80% interfacial agent composition；The polyacrylate polymers
Relative molecular weight be 2000~6000.
2. the surface modifier in automobile bloom finishing coat as described in claim 1, it is characterised in that: the polyacrylate is birdsed of the same feather flock together
Close the specific synthetic method of object are as follows: by mass percentage, weigh acrylic acid 0~2% respectively, butyl acrylate 45~55%,
Monomer is added drop-wise in solvent, in initiator by hydroxy-ethyl acrylate 1~3%, ethyl acrylate 40~50% by dropwise addition mode
Under the action of carry out polymerization reaction, reaction temperature is 80~90 DEG C, and the reaction time is 5~8 hours, discharges, obtains after reaction
Polyacrylate polymers.
3. the surface modifier in automobile bloom finishing coat as claimed in claim 2, it is characterised in that: the initiator is peroxidating
Dibenzoyl or azodiisobutyronitrile；The solvent is toluene, dimethylbenzene, hexamethylene.
4. the surface modifier in automobile bloom finishing coat as described in claim 1, it is characterised in that: the interfacial agent is table
It is 5800~10000 that control auxiliary agent in face, which is by number-average molecular weight, the polyether segment and number that weight average molecular weight is 6000~12000
Average molecular weight is 1800~5500, and the dimethyl silicone polymer that weight average molecular weight is 2000~6000 is polymerized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679250.0A CN108976892A (en) | 2018-06-27 | 2018-06-27 | A kind of surface modifier in automobile bloom finishing coat |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810679250.0A CN108976892A (en) | 2018-06-27 | 2018-06-27 | A kind of surface modifier in automobile bloom finishing coat |
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| CN108976892A true CN108976892A (en) | 2018-12-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374291A (en) * | 2012-04-20 | 2013-10-30 | 常州市同丰涂料有限公司 | High-gloss super wear-resisting automobile topcoat |
| CN104312399A (en) * | 2014-06-11 | 2015-01-28 | 郑州精益达汽车零部件有限公司 | Black top paint with high blackness and blue phase, and preparation method thereof |
| CN107057536A (en) * | 2017-05-09 | 2017-08-18 | 芜湖春风新材料有限公司 | A kind of body of a motor car special coating and its preparation method and application |
| CN107474677A (en) * | 2017-09-27 | 2017-12-15 | 芜湖春风新材料有限公司 | A kind of high-solid lower-viscosity bumper varnish, preparation method and its application method |
-
2018
- 2018-06-27 CN CN201810679250.0A patent/CN108976892A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103374291A (en) * | 2012-04-20 | 2013-10-30 | 常州市同丰涂料有限公司 | High-gloss super wear-resisting automobile topcoat |
| CN104312399A (en) * | 2014-06-11 | 2015-01-28 | 郑州精益达汽车零部件有限公司 | Black top paint with high blackness and blue phase, and preparation method thereof |
| CN107057536A (en) * | 2017-05-09 | 2017-08-18 | 芜湖春风新材料有限公司 | A kind of body of a motor car special coating and its preparation method and application |
| CN107474677A (en) * | 2017-09-27 | 2017-12-15 | 芜湖春风新材料有限公司 | A kind of high-solid lower-viscosity bumper varnish, preparation method and its application method |
Non-Patent Citations (3)
| Title |
|---|
| 吕正伟: "有机硅流变改性剂的合成及性能研究", 《中国优秀硕士学位论文全文数据库（电子期刊），工程科技第Ⅰ辑》 * |
| 周艺峰等: "粉末涂料用丙烯酸酯类流平剂的研制", 《安徽大学学报（自然科学版）》 * |
| 章奕: "高性能双组份聚氨酯车用面漆的研制", 《上海涂料》 * |
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