CN116535969A - Novel IPA pretreatment solvent and preparation method thereof - Google Patents
Novel IPA pretreatment solvent and preparation method thereof Download PDFInfo
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- CN116535969A CN116535969A CN202310501850.9A CN202310501850A CN116535969A CN 116535969 A CN116535969 A CN 116535969A CN 202310501850 A CN202310501850 A CN 202310501850A CN 116535969 A CN116535969 A CN 116535969A
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- 239000002904 solvent Substances 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title abstract description 5
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims abstract description 194
- -1 polypropylene Polymers 0.000 claims abstract description 73
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000013530 defoamer Substances 0.000 claims abstract description 28
- 239000012875 nonionic emulsifier Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 52
- 229920001400 block copolymer Polymers 0.000 claims description 33
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 32
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical compound CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 32
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 32
- 229930195729 fatty acid Natural products 0.000 claims description 32
- 239000000194 fatty acid Substances 0.000 claims description 32
- 229920005862 polyol Polymers 0.000 claims description 27
- 229920001451 polypropylene glycol Polymers 0.000 claims description 27
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 20
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 19
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 7
- 229920000570 polyether Polymers 0.000 claims description 7
- 229920003023 plastic Polymers 0.000 claims description 5
- 239000004033 plastic Substances 0.000 claims description 5
- 239000002518 antifoaming agent Substances 0.000 claims description 3
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 3
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 abstract description 10
- 229920001155 polypropylene Polymers 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 238000005238 degreasing Methods 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000009835 boiling Methods 0.000 abstract description 2
- 239000002987 primer (paints) Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 150000005846 sugar alcohols Polymers 0.000 description 2
- IMROMDMJAWUWLK-UHFFFAOYSA-N Ethenol Chemical compound OC=C IMROMDMJAWUWLK-UHFFFAOYSA-N 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920006113 non-polar polymer Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920013636 polyphenyl ether polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C09D177/00—Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain; Coating compositions based on derivatives of such polymers
-
- 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
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
Abstract
The invention belongs to the field of automobile manufacturing, and particularly relates to an IPA pretreatment solvent and a preparation method and application thereof. The IPA pretreatment solvent disclosed by the invention comprises the following raw materials: ethyl acetate, a nonionic emulsifier, a defoamer and isopropanol. The IPA pretreatment solvent disclosed by the invention can be used for degreasing more effectively, has a lower boiling point and a faster solvent volatilization rate, has a solubility parameter closer to that of the polypropylene of the bumper material, and can be used for improving the adhesive force between the surface of the bumper and the primer coating.
Description
Technical Field
The invention belongs to the field of automobile manufacturing, and particularly relates to an IPA pretreatment solvent and a preparation method and application thereof.
Background
With the rapid development of the automobile industry, more customers are seeking attractive appearance, and simultaneously, higher requirements are also put on the safety performance of automobiles. The automobile bumper has the functions of decorating a vehicle, protecting safety, improving aerodynamic characteristics of the vehicle and the like. In appearance, the automobile bumper has appearance decoration and becomes an important part for decorating the appearance of a car. Safely, the bumper can play a buffering role when the automobile collides at a low speed, and can play a certain role in protecting pedestrians.
The automobile bumper material is mostly made of high polymer material polypropylene through injection molding process. Because the polypropylene material belongs to a nonpolar material, the adhesion between the bumper and the primer layer is relatively poor when the bumper is coated, and the surface of the bumper needs to ensure enough cleanliness so as to improve the adhesion. In addition, in the case of the bumper, since the mold is coated with a release agent, the release agent is generally a fatty acid-based oil or fat, and a part of the release agent remains on the surface of the bumper. Therefore, before the bumper is coated, the surface of the bumper is subjected to IPA (isopropyl alcohol) pretreatment to achieve the effects of dust removal and degreasing.
However, when the IPA pretreatment is performed on the bumper, the coating quality of the automobile bumper is greatly affected by weather environment, and particularly, under the environment with lower temperature and higher humidity, the coating product has abnormal quality such as shrinkage cavity and the like, so that the part is scrapped; the product after coating can have the defects of watermarks and the like, and in order to ensure no water stain residue after the IPA solvent is wiped, a high-pressure air gun is required to be added for purging, so that the working procedures of personnel are increased, and the production beat is influenced.
Disclosure of Invention
The invention aims to provide an IPA pretreatment solvent which can provide better dust removal and degreasing effects and effectively avoid quality anomalies such as shrinkage cavities, watermarks and the like of a coated product.
It is still another object of the present invention to provide a method for preparing the above-mentioned IPA pretreatment solvent.
It is a further object of the present invention to provide the use of the above-described IPA pretreatment solvent.
According to the IPA pretreatment solvent disclosed by the embodiment of the invention, the IPA pretreatment solvent comprises the following raw materials in parts by volume: 20-30 parts of ethyl acetate, 0.2-5 parts of nonionic emulsifier, 0.5-1.5 parts of defoamer and 70-100 parts of isopropanol.
The IPA pretreatment solvent according to the specific embodiment of the invention, the nonionic emulsifier is one or more of polyoxyethylene ether, polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester and polyvinyl alcohol;
preferably, the nonionic emulsifier is one or more of polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester and polyvinyl alcohol.
The chemical structure and composition of the optional defoamer comprise mineral oil, alcohols, fatty acid and fatty acid esters, amides, phosphate esters, organic silicon, polyether and polyether modified polysiloxane defoamer; preferably, the defoamer is a polyether modified silicon defoamer.
According to the IPA pretreatment solvent disclosed by the embodiment of the invention, the IPA pretreatment solvent comprises the following raw materials in parts by volume: 25-28 parts of ethyl acetate, 0.5-2 parts of nonionic emulsifier, 0.8-1.2 parts of polyether modified silicon defoamer and 75-90 parts of isopropanol, wherein the nonionic emulsifier is one or more of polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester and polyvinyl alcohol.
The nonionic emulsifier in the invention can be selected from single polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester or polyvinyl alcohol; or,
the nonionic emulsifier may be selected from any two of polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, and polyvinyl alcohol, for example, polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, or ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, or ethylene oxide and propylene oxide block copolymer, polyvinyl alcohol, or polyoxypropylene ether, polyol fatty acid, etc., preferably, the ratio of the two components is 1 (1-5).
The nonionic emulsifier may be selected from any three of polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, polyvinyl alcohol, for example, polypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, or ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, polyvinyl alcohol. Preferably, the ratio of the polypropylene ether, the ethylene oxide and propylene oxide block copolymer and the polyol fatty acid ester is 1:1:1, and the ratio of the ethylene oxide and propylene oxide block copolymer, the polyol fatty acid ester and the polyvinyl alcohol is 1:1:1.
Preferably, the polyoxyethylene and polyoxypropylene block copolymer is 0.2-0.5 parts, the polyol fatty acid ester is 0.2-0.5 parts, and the polyoxypropylene component is 0.2-0.5 parts by volume fraction.
The nonionic emulsifier is polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyalcohol fatty acid ester and polyvinyl alcohol, and the ratio of the polyoxypropylene ether, the ethylene oxide and propylene oxide block copolymer, the polyalcohol fatty acid ester and the polyvinyl alcohol is 1:1:1.
The invention also provides a preparation method of the IPA pretreatment solvent, which comprises the following steps:
according to the volume parts, ethyl acetate, a nonionic emulsifier, a defoaming agent and isopropanol are taken and uniformly mixed to obtain the IPA pretreatment solvent.
The invention also provides application of the IPA pretreatment solvent, especially application in coating plastic products, wherein the plastic products comprise polyethylene, polyvinyl chloride, polypropylene, polystyrene, phenolic and aminoplast, polyamide, polycarbonate, polyoxymethylene, polysulfone, ABS, polyphenyl ether, fluoroplastic and the like.
Preferably, the IPA pretreatment solvent of the present invention exhibits excellent effects in coating an automobile bumper, wherein the automobile bumper material is mostly formed by an injection molding process using a polymer material polypropylene.
Before the bumper is coated, IPA pretreatment is carried out on the surface of the bumper so as to achieve the effects of dust removal and degreasing. The IPA pretreatment is to wipe the entire surface of the bumper resin member with a wiping cloth containing an IPA pretreatment solvent.
The invention has the beneficial effects that:
(1) The IPA pretreatment solvent has stronger emulsification effect and can be used for degreasing more effectively, thereby ensuring the cleanliness of the surface of a plastic part.
(2) The IPA pretreatment solvent has a lower boiling point and a stronger volatilization effect, can ensure that the pretreatment solvent is completely volatilized, has no solvent residue, does not need to additionally increase working procedures and use a high-pressure air gun for purging, and ensures the stable quality of products.
(3) The IPA pretreatment solvent disclosed by the invention has a solubility parameter which is closer to that of the polypropylene which is a nonpolar polymer material, and can effectively improve the adhesion between the primer and the surface of the bumper.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, based on the examples herein, which are within the scope of the invention as defined by the claims, will be within the scope of the invention as defined by the claims.
The main solvents used in the embodiment of the invention are as follows:
isopropyl alcohol: guangzhou Enbi paint Co., ltd., model: t-877;
ethyl acetate: model T-6502, guangzhou Enbi paint Co., ltd;
polyoxypropylene ether: the model of the Tianjin Gaotian new material science and technology Co., ltd is CK-1040;
ethylene oxide and propylene oxide block copolymers: shanghai Yu New Material science and technology Co., ltd., model: epan710,720,740;
polyvinyl alcohol: japanese colali, model: KURARAY POVAL 3-98;
polyol fatty acid esters: south Tong Alchis chemical Co., ltd., model: PEG-200MO;
defoaming agent: nantong Yongle chemical Co., ltd., model: YL-609.
The invention provides an IPA pretreatment solvent which comprises the following raw materials in parts by volume: 20-30 parts of ethyl acetate, 0.2-5 parts of nonionic emulsifier, 0.5-1.5 parts of defoamer and 70-100 parts of isopropanol;
wherein the nonionic emulsifier is one or more of polyoxyethylene ether, polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester and polyvinyl alcohol.
Preferably, the defoamer is a polyether modified silicon defoamer.
The IPA pretreatment solvent of the invention will be described by way of specific examples.
Example 1
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 1 part of ethylene oxide and propylene oxide block copolymer, and 1 part of defoamer.
Example 2
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 1 part of ethylene oxide and propylene oxide block copolymer, and 1 part of defoamer.
Example 3
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 1 part of polyol fatty acid ester and 1 part of defoamer.
Example 4
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 1 part of polyoxypropylene ether and 1 part of defoamer.
Example 5
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.5 part of ethylene oxide and propylene oxide block copolymer, 0.5 part of polyol fatty acid ester, and 1 part of defoamer.
Example 6
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.5 part of ethylene oxide and propylene oxide block copolymer, 0.5 part of polyoxypropylene ether and 1 part of defoamer.
Example 7
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.5 part of ethylene oxide and propylene oxide block copolymer, 0.5 part of polyvinyl alcohol and 1 part of defoamer.
Example 8
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.5 part of ethylene oxide and propylene oxide block copolymer, 0.5 part of polyol fatty acid ester, 0.5 part of polyoxypropylene ether and 1 part of defoamer.
Example 9
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.5 part of ethylene oxide and propylene oxide block copolymer, 0.5 part of polyoxypropylene ether, 0.5 part of polyvinyl alcohol and 1 part of defoamer.
Example 10
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.5 part of polyol fatty acid ester, 0.5 part of polyoxypropylene ether, 0.5 part of polyvinyl alcohol and 1 part of defoamer.
Example 11
The IPA pretreatment solvent of this example comprises 75 parts of isopropanol, 25 parts of ethyl acetate, 0.2 part of ethylene oxide and propylene oxide block copolymer, 0.2 part of polyol fatty acid ester, 0.2 part of polyoxypropylene ether and 0.8 part of defoamer.
Example 12
The IPA pretreatment solvent of this example comprises 80 parts of isopropanol, 26 parts of ethyl acetate, 0.3 part of ethylene oxide and propylene oxide block copolymer, 0.3 part of polyol fatty acid ester, 0.3 part of polyoxypropylene ether and 0.9 part of defoamer.
Example 13
The IPA pretreatment solvent of this example comprises 85 parts of isopropanol, 27 parts of ethyl acetate, 0.4 part of ethylene oxide and propylene oxide block copolymer, 0.4 part of polyol fatty acid ester, 0.4 part of polyoxypropylene ether and 1.1 part of defoamer.
Example 14
The IPA pretreatment solvent of this example comprises 90 parts of isopropanol, 28 parts of ethyl acetate, 0.5 part of ethylene oxide and propylene oxide block copolymer, 0.5 part of polyol fatty acid ester, 0.5 part of polyoxypropylene ether and 1.2 parts of defoamer.
Isopropyl alcohol was used as comparative example 1. The automobile bumpers were treated with examples 1-10 and comparative example 1 above, and then painted:
the IPA pretreatment process is to put a wiper in an IPA container, take out the wiper from the IPA container, wring the wiper, and then wipe the surface of the bumper with the wiper containing an IPA pretreatment solvent.
Performance tests (including volatilization speed, surface tension, paint adhesion and peel strength) were performed on the painted bumper.
Volatilization speed: the evaporation rate was measured according to ASTM3539-76, test method for measuring evaporation rate of volatile liquids with shell-type thin film evaporator.
Surface tension: the surface tension of the modified polypropylene plastic panels was tested with a surface tension solvent, reference to FORD Standard B0116-03. The greater the surface tension, the more polar the surface polypropylene material.
Coating adhesive force: the adhesion after coating was tested according to GB/T9286-88 cross-hatch test of color paint and varnish film.
The performance parameters obtained from the test are shown in table 1.
TABLE 1 Performance test results after IPA pretreatment solvent treatment
As is clear from Table 1, the IPA pretreatment solvents of examples 1 to 10 of the present invention were improved in volatilization rate, surface tension and coating adhesion, as compared with comparative example 1, and the improvement of examples 5 to 8 was more remarkable.
The coating adhesion in table 1 was judged by the hundred-cell test, and it was impossible to quantitatively analyze and distinguish the differences of examples 1 to 10, and for further analysis and comparison, the present invention was quantified by peel strength, which is the maximum force required for peeling from the contact surface per unit width, and the results are shown in the following table.
TABLE 2 comparison of peel strength of IPA pretreatment solvents
As is clear from Table 2, compared with comparative example 1, the IPA pretreatment solvents of examples 1 to 10 of the present invention have improved peel strength, wherein the effect of example 8 is superior to that of other examples, and the three components of ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester and polyoxypropylene are compounded to form a uniform solvent in a stable state, which is favorable for swelling, improving surface tension and surface adhesion, and exerting the dissolution characteristics of the solvent, so that the dirt on the surface of the material, which is difficult to dissolve, is easier to dissolve, and has the effects of degreasing and degreasing.
The present invention also tested the above performance of examples 11-14 to obtain the same effect as example 8, and will not be described in detail herein because of limited space.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. The IPA pretreatment solvent is characterized by comprising the following raw materials in parts by volume: 20-30 parts of ethyl acetate, 0.2-5 parts of nonionic emulsifier, 0.5-1.5 parts of defoamer and 70-100 parts of isopropanol.
2. The IPA pretreatment solvent of claim 1, wherein the nonionic emulsifier is one or more of polyoxyethylene ether, polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, polyvinyl alcohol.
3. The IPA pretreatment solvent of claim 1, wherein the nonionic emulsifier is one or more of polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester, polyvinyl alcohol.
4. An IPA pretreatment solvent as recited in claim 1 wherein the defoamer is a polyether modified silicon defoamer.
5. The IPA pretreatment solvent according to claim 1, wherein the IPA pretreatment solvent is composed of the following raw materials in parts by volume: 25-28 parts of ethyl acetate, 0.6-3 parts of nonionic emulsifier, 0.8-1.2 parts of polyether modified silicon defoamer and 75-90 parts of isopropanol, wherein the nonionic emulsifier is one or more of polyoxypropylene ether, ethylene oxide and propylene oxide block copolymer, polyol fatty acid ester and polyvinyl alcohol.
6. A process for preparing an IPA pretreatment solvent as recited in any one of claims 1-5, comprising the steps of:
according to the volume parts, ethyl acetate, a nonionic emulsifier, a defoaming agent and isopropanol are taken and uniformly mixed to obtain the IPA pretreatment solvent.
7. Use of an IPA pretreatment solvent as recited in any one of claims 1-5.
8. Use of an IPA pretreatment solvent as recited in any one of claims 1-5 for coating plastic articles.
9. Use of an IPA pretreatment solvent as recited in any one of claims 1-5 for coating an automotive bumper.
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