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CN105017878A - Moisture-proof thermosetting prime coating glue and preparation method thereof - Google Patents

Moisture-proof thermosetting prime coating glue and preparation method thereof Download PDF

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Publication number
CN105017878A
CN105017878A CN201510514214.5A CN201510514214A CN105017878A CN 105017878 A CN105017878 A CN 105017878A CN 201510514214 A CN201510514214 A CN 201510514214A CN 105017878 A CN105017878 A CN 105017878A
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CN
China
Prior art keywords
moisture
thermosetting
agent
primary coat
product
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Pending
Application number
CN201510514214.5A
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Chinese (zh)
Inventor
赵丹
陈岳新
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Zhangjiagang Dayi Auto Part Technology Co Ltd
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Zhangjiagang Dayi Auto Part Technology Co Ltd
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Priority to CN201510514214.5A priority Critical patent/CN105017878A/en
Publication of CN105017878A publication Critical patent/CN105017878A/en
Pending legal-status Critical Current

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  • Adhesives Or Adhesive Processes (AREA)

Abstract

The invention discloses moisture-proof thermosetting prime coating glue. The prime coating glue comprises components as follows: PVC (polyvinyl chloride) resin, a filling agent, a plasticizer, a dispersing agent, a tackifier, a moisture absorbent and a stabilizer and is characterized by comprising, in percentage by mass, 20%-35% of PVC resin, 15%-30% of the filling agent, 25%-40% of the plasticizer, 4%-8% of the dispersing agent, 1%-15% of the tackifier, 5%-10% of the moisture absorbent and 1%-5% of the stabilizer. The preparation method of the moisture-proof thermosetting prime coating glue comprises steps as follows: (1), all the plasticizer and the dispersing agent are uniformly mixed, powder is added to the mixture, and after the powder is all poured out, the mixture is uniformly mixed until no particle exists; (2), the mixture is left to stand still until a product is cured; (3), the viscosity of the product is adjusted after curing; (4), then the product is filtered, and thermosetting foaming prime coating glue is obtained. The prime coating glue is mainly used for increasing stone chip resistance of a chassis and wheel houses of an automobile, can be stored for longer time after being sprayed on the body of the automobile in wet and hot summer by comparison with a traditional product and can meet a long-time storage requirement of a customer in holiday.

Description

A kind of thermosetting moisture-resistant type primary coat glue and preparation method thereof
Technical field
The present invention relates to a kind of primary coat glue, particularly relate to a kind of thermosetting moisture-resistant type primary coat glue acting on automobile chassis and wheelhouse portions and preparation method thereof.
Background technology
In general, most of automobile domain and wheelhouse portions surface smear primary coat glue, play waterproof, preventing stone, antirust, reduce the effect of noise, primary coat glue is smeared before middle painting paint spay-coating, after glue prebake → middle painting → finish paint baking oven baking, complete sclerous reaction.
Original primary coat glue is being sprayed on vehicle body, place when baking, its waterproof moisture-proof function is not ideal enough, and waterproof moisture-proof timeliness falls short of, especially in summer, during the hot and humid time, the moisture in air can slowly infiltrate through in the primary coat glue after smearing, and spreads upon wet glue storage period of vehicle body more than 24 hours, then occur because the bubble of moisture evaporation generation after overbaking in colloid, cause product appearance quality bad phenomenon, tack, wear resistance declines.Need again to process to the vehicle body that this bad phenomenon occurs, so just waste a large amount of labours, material resources, reduce production efficiency, production cost increases greatly.
Can place for a long time for meeting vehicle when automobile factory has a holiday or vacation, adopting flame-proof moisture resistance type primary coat glue, product spreads upon after on vehicle body in wet glue situation, and storage period can reach 72 hours.Have a holiday or vacation weekend and can clear up production line, saved manpower and materials and time.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of technique meeting automobile factory to change requirement, reach the flame-proof moisture resistance type primary coat glue spreading upon long-time placement under wet gluey state on vehicle body.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of thermosetting moisture-resistant type primary coat glue, be made up of PVC copolymer resin, weighting agent, softening agent, dispersion agent, tackifier, moisture adsorbent, stablizer, it is characterized in that: it specifically consists of by mass percentage: PVC copolymer resin 20 ~ 35%, weighting agent 15 ~ 30%, softening agent 25 ~ 40%, dispersion agent 4 ~ 8%, tackifier 1 ~ 15%, moisture adsorbent 5 ~ 10%, stablizer 1 ~ 5%;
Described moisture adsorbent is forming without coating oxidation calcium and coating oxidation calcium of 1:2 ~ 2:1 by quality.
A kind of thermosetting moisture-resistant type primary coat glue, by mass percentage, it preferably consists of: PVC homopolymerization resin 5 ~ 15%, PVC copolymer resin 5 ~ 15%, PVC blending resin 2 ~ 5%, weighting agent 15 ~ 30%, softening agent 25 ~ 40%, dispersion agent 4 ~ 8%, tackifier 1 ~ 15%, moisture adsorbent 5 ~ 10%, stablizer 1 ~ 5%;
Described moisture adsorbent is forming without coating oxidation calcium and coating oxidation calcium of 1:2 ~ 2:1 by quality.
Each moiety about described primary coat glue is described as follows:
The effect of described polyvinyl chloride resin, makes product have strong elastic and toughness, is applied in steel plate connecting portion, play waterproof, preventing stone, antirust, reduce the effect of noise, mass percentage 20 ~ 35% in full composition, if content has intensity lower than 20% and toughness reduces, waterproof, antirust, reduce the low problem of function of noise to occur, if content can smear disengaging problem higher than 35%.Polyvinyl chloride resin in the present invention be stick with paste resin, stick with paste resin can be used alone copolymer resins, or the homopolymerization resin of 5 ~ 15%, 5 ~ 15% copolymer resins, 2 ~ 5% blending resin used in combination.
Described without coating coarse whiting, coating coarse whiting as weighting agent.Coarse whiting is exactly calcite in powder, is the abbreviation of water-ground limestone, is to be ground by natural carbonate mineral form as calcite, marble, Wingdale, is conventional powdery inorganic filler.The effect of weighting agent improves workability, antitrickle, maintains even intensity, if content is low, and trickling problem can occur, if the high PVC elasticity that has of content reduces and film cracking problem.
Described moisture adsorbent is calcium oxide, and suitable mass percentage is 5 ~ 10%, if content is lower than 5%, has bubble and have problems when the intrusion because of outside moisture is hardened, if content has albefaction more than 10% and cracking phenomena occurs.Described moisture adsorbent is made up of the coating oxidation calcium without coating oxidation calcium and 2.5 ~ 5% of 2.5 ~ 5%.
The effect of described softening agent is the plasticity increasing polyvinyl chloride resin, gives PVC when smearing workability and sclerosis and has toughness and elasticity.Suitable mass percentage 20 ~ 35% in full composition, if to have viscosity lower than 25% too high for content, the low problem of workability occurs, if to have viscosity higher than 35% too low for content, trickling phenomenon and the low problem of intensity occur.Described softening agent is dioctyl phthalate (DOP) or diisononyl phthalate.
The effect of described tackifier makes product can be attached to tack on steel plate, and improve the force of cohesion of product.Suitable mass percentage is 1 ~ 15%, and occur if content has the low problem of the bad force of cohesion of sticking power lower than 1%, if content can make higher than 15%, product strength is excessive causes film cracking problem.Above-mentioned tackifier are the modified polyamide product (SY-533) that Wuxi great kindness synthetic materials company limited produces.
Described stablizer mass percentage 1 ~ 5%, if PVC has xanthochromia problem and occurs when content does thermotolerance lower than 1%, if content has sticking power more than 5%, low problem occurs, and zinc oxide selected by described stablizer, or also can select lead-containing compounds.
The effect of described dispersion agent is the operability improving product, the suitable mass percentage 4 ~ 8% in full composition, occurs if content has the bad problem of operability workability lower than 4%, occurs if content has the too low problem of solid part higher than 8%.Described dispersion agent selects boiling point at the hydrocarbon polymer of 140 DEG C-310 DEG C.
Second technical problem to be solved by this invention is: the preparation method providing a kind of thermosetting moisture-resistant type primary coat glue.
For solving second with regard to technical problem, the technical scheme adopted is: a kind of preparation method of thermosetting moisture-resistant type primary coat glue, the steps include:
1) first whole softening agent and dispersion agent are added in three axle stirrers, open agitating vane and prevent powder from sticking to a barrel wall, open ribbon blade and powder and liquid material are stirred up and down stir, then by formula rate, powder is poured in three axle stirrers.Open high speed dispersion axle after powder is all finished down, rely on the stirring of high speed dispersion axle to make to mix without particle; In whole process, control temperature must not higher than 40 DEG C;
2), after vacuum condition stirs and terminates, product is transplanted in stirring tank from mixing equipment, places and make product slaking in more than 8 hours;
3) slaking complete after mensuration product viscosity, (softening agent added is mainly used in adjusting the viscosity of product to add softening agent in addition, because of viscosity with temperature change, customer requirement, all can there is change in atmospheric moisture and the difference often criticizing raw material, in order to adjust to the viscosity of needs, the plasticising dosage added in maturing process is all different ninety-nine times out of a hundred, does not calculate at recipe) adjust product to requiring viscosity; Need after adding softening agent to stir, agitation condition is at every turn: stir pressure lower than-0.08Mpa, churning time: 20 ± 5 minutes;
4), after viscosity reaches requirement, heat embrittlement expansion type primary coat glue is filtered to obtain through 60 ~ 80 mesh filter screens.
Beneficial effect: thermosetting moisture-resistant type primary coat glue disclosed in the present application, product spreads upon after on vehicle body in wet glue situation, and storage period can reach 72 hours.Automobile factory has a holiday or vacation and can clear up production line weekend, has saved manpower and materials and time.
Embodiment:
It is below the detailed description according to embodiment and comparative example.
Table one is the synopsis that embodiment and comparative example 1,2 respectively become to be grouped into.
Table two is each physicals synopsis under embodiment and comparative example 1,2 toast 30 minutes situations at 140 DEG C:
Above-mentioned table two can reflect: embodiment and comparative example 1,2 are after anti-moisture test, and outward appearance in 140 DEG C of bakings, 30 minutes situations, tensile strength, it is larger that sticking power and anti-stone hit gender gap.And embodiment 1 due to formula in moisture adsorbent content lower, at 35 DEG C, 95% humidity, 72 hours place after cooking performance promote to some extent, but do not reach customer requirement.Embodiment 2 product performance are good, meet the requirements.Embodiment 3 product performance are good, meet the requirements, but use polyvinyl chloride resin more, and cost is higher, in actual production process, do not produce value in batches.
The technological process of production of primary coat glue of the present invention is conventional at present, is first that each component is uniformly mixed placement after 1 ~ 2 day according to proportioning, and then successively after maturation, viscosity adjustment, physical property detect operation, obtains finished product after finally filtering and packaging.
As can be seen from above table one, table two, primary coat glue disclosed in technical scheme compares traditional primary coat glue at 35 DEG C, 95% humidity, after within 72 hours, placing in 140 DEG C of bakings, 30 minutes situations, disclosed in technical scheme, primary coat glue is in outward appearance, tensile strength, not quite, wet fastness is better for sticking power and anti-hitting property of stone performance variation.The requirement that when client has a holiday or vacation, painting wet glue is onboard placed for a long time can be met, need not have a holiday or vacation at every turn all the car on line all cleared up, save the manpower of client, material resources and time cost.

Claims (6)

1. a thermosetting moisture-resistant type primary coat glue, be made up of PVC copolymer resin, weighting agent, softening agent, dispersion agent, tackifier, moisture adsorbent, stablizer, it is characterized in that: it specifically consists of by mass percentage: PVC copolymer resin 20 ~ 35%, weighting agent 15 ~ 30%, softening agent 25 ~ 40%, dispersion agent 4 ~ 8%, tackifier 1 ~ 15%, moisture adsorbent 5 ~ 10%, stablizer 1 ~ 5%;
Described moisture adsorbent is forming without coating oxidation calcium and coating oxidation calcium of 1:2 ~ 2:1 by quality.
2. a thermosetting moisture-resistant type primary coat glue, it is characterized in that: by mass percentage, it consists of: PVC homopolymerization resin 5 ~ 15%, PVC copolymer resin 5 ~ 15%, PVC blending resin 2 ~ 5%, weighting agent 15 ~ 30%, softening agent 25 ~ 40%, dispersion agent 4 ~ 8%, tackifier 1 ~ 15%, moisture adsorbent 5 ~ 10%, stablizer 1 ~ 5%;
Described moisture adsorbent is forming without coating oxidation calcium and coating oxidation calcium of 1:2 ~ 2:1 by quality.
3. a kind of thermosetting moisture-resistant type primary coat glue as claimed in claim 1 or 2, is characterized in that: described dispersion agent is boiling point at the hydrocarbon polymer of 140 DEG C-310 DEG C.
4. a kind of thermosetting moisture-resistant type primary coat glue as claimed in claim 1 or 2, is characterized in that: described softening agent is dioctyl phthalate (DOP) or diisononyl phthalate.
5. a kind of thermosetting moisture-resistant type primary coat glue as claimed in claim 1 or 2, is characterized in that: described stablizer is zinc oxide or lead-containing compounds.
6. a preparation method for thermosetting moisture-resistant type primary coat glue, the steps include:
1) first that whole softening agent and dispersant is even by formula rate according to claim 1, then powder is added wherein, after powder is all finished down, mix without particle; In whole process, control temperature must not higher than 40 DEG C;
2) product is transferred in stirring tank, places and make product slaking in more than 8 hours;
3) slaking complete after mensuration product viscosity, add in addition softening agent adjustment product viscosity to requiring numerical value; Need after adding softening agent to stir, agitation condition is at every turn: stir environmental stress lower than-0.08Mpa, churning time: 20 ± 5 minutes;
4), after viscosity reaches requirement, thermosetting moisture-resistant type primary coat glue is filtered to obtain through 60 ~ 80 mesh filter screens.
CN201510514214.5A 2015-08-20 2015-08-20 Moisture-proof thermosetting prime coating glue and preparation method thereof Pending CN105017878A (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107722740A (en) * 2017-09-08 2018-02-23 张家港爱科思汽车配件有限公司 A kind of automobile using foaming bottom gluing
CN111732856A (en) * 2019-03-25 2020-10-02 博尔泰(上海)化工科技发展有限公司 Multifunctional vehicle-used PVC plastisol composition capable of spraying
CN114045128A (en) * 2021-10-20 2022-02-15 广州集泰化工股份有限公司 Welding seam sealant
CN114773924A (en) * 2022-03-31 2022-07-22 华南理工大学 Method for improving automobile coating adhesive sagging and slipping by adopting laponite

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102618148A (en) * 2012-03-30 2012-08-01 北京红狮漆业有限公司 Epoxy coating and preparation method and application thereof
CN102807812A (en) * 2012-09-07 2012-12-05 上海应用技术学院 Latent curing single-component polyurethane water-proof coating and preparation method thereof
CN102181106B (en) * 2011-03-23 2013-01-23 张家港西一新型汽车配件有限公司 Thermosetting moisture-resistant welding seam sealant
CN103409037A (en) * 2013-08-06 2013-11-27 信和新材料股份有限公司 Solvent type double-composition epoxy coating material quick to solidify at low temperature and preparation method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102181106B (en) * 2011-03-23 2013-01-23 张家港西一新型汽车配件有限公司 Thermosetting moisture-resistant welding seam sealant
CN102618148A (en) * 2012-03-30 2012-08-01 北京红狮漆业有限公司 Epoxy coating and preparation method and application thereof
CN102807812A (en) * 2012-09-07 2012-12-05 上海应用技术学院 Latent curing single-component polyurethane water-proof coating and preparation method thereof
CN103409037A (en) * 2013-08-06 2013-11-27 信和新材料股份有限公司 Solvent type double-composition epoxy coating material quick to solidify at low temperature and preparation method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107722740A (en) * 2017-09-08 2018-02-23 张家港爱科思汽车配件有限公司 A kind of automobile using foaming bottom gluing
CN111732856A (en) * 2019-03-25 2020-10-02 博尔泰(上海)化工科技发展有限公司 Multifunctional vehicle-used PVC plastisol composition capable of spraying
CN114045128A (en) * 2021-10-20 2022-02-15 广州集泰化工股份有限公司 Welding seam sealant
CN114045128B (en) * 2021-10-20 2022-12-23 广州集泰化工股份有限公司 Welding seam sealant
CN114773924A (en) * 2022-03-31 2022-07-22 华南理工大学 Method for improving automobile coating adhesive sagging and slipping by adopting laponite
CN114773924B (en) * 2022-03-31 2022-11-18 华南理工大学 A method of using laponite to improve the sagging and slipping of automobile coating glue and the method of drying and foaming caused by moisture absorption

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