CN116375909A - Sagging-resistant resin, preparation method and application thereof in preparation of low-temperature baking paint coating - Google Patents
Sagging-resistant resin, preparation method and application thereof in preparation of low-temperature baking paint coating Download PDFInfo
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- CN116375909A CN116375909A CN202310198373.3A CN202310198373A CN116375909A CN 116375909 A CN116375909 A CN 116375909A CN 202310198373 A CN202310198373 A CN 202310198373A CN 116375909 A CN116375909 A CN 116375909A
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- 238000007665 sagging Methods 0.000 title claims abstract description 65
- 239000011347 resin Substances 0.000 title claims abstract description 56
- 229920005989 resin Polymers 0.000 title claims abstract description 56
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 238000000576 coating method Methods 0.000 title claims description 24
- 239000003973 paint Substances 0.000 title abstract description 25
- 239000011248 coating agent Substances 0.000 title description 21
- BHHGXPLMPWCGHP-UHFFFAOYSA-N Phenethylamine Chemical compound NCCC1=CC=CC=C1 BHHGXPLMPWCGHP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229940117803 phenethylamine Drugs 0.000 claims abstract description 7
- 150000001875 compounds Chemical class 0.000 claims abstract description 6
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 18
- 239000002966 varnish Substances 0.000 claims description 16
- URLKBWYHVLBVBO-UHFFFAOYSA-N Para-Xylene Chemical group CC1=CC=C(C)C=C1 URLKBWYHVLBVBO-UHFFFAOYSA-N 0.000 claims description 12
- 229940008841 1,6-hexamethylene diisocyanate Drugs 0.000 claims description 11
- 229920000178 Acrylic resin Polymers 0.000 claims description 11
- 239000004925 Acrylic resin Substances 0.000 claims description 11
- 150000004945 aromatic hydrocarbons Chemical class 0.000 claims description 8
- 229920001225 polyester resin Polymers 0.000 claims description 7
- 239000004645 polyester resin Substances 0.000 claims description 7
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000002904 solvent Substances 0.000 claims description 5
- WGTASENVNYJZBK-UHFFFAOYSA-N 3,4,5-trimethoxyamphetamine Chemical compound COC1=CC(CC(C)N)=CC(OC)=C1OC WGTASENVNYJZBK-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 239000011087 paperboard Substances 0.000 description 20
- 239000003795 chemical substances by application Substances 0.000 description 15
- 238000002474 experimental method Methods 0.000 description 11
- 238000001514 detection method Methods 0.000 description 10
- 239000011521 glass Substances 0.000 description 8
- 238000002156 mixing Methods 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 238000001132 ultrasonic dispersion Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- ULUZGMIUTMRARO-UHFFFAOYSA-N (carbamoylamino)urea Chemical group NC(=O)NNC(N)=O ULUZGMIUTMRARO-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000005311 nuclear magnetism Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 239000006228 supernatant Substances 0.000 description 2
- YXRKNIZYMIXSAD-UHFFFAOYSA-N 1,6-diisocyanatohexane Chemical compound O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O YXRKNIZYMIXSAD-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- -1 biuret compound Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/30—Introducing nitrogen atoms or nitrogen-containing groups
- C08F8/32—Introducing nitrogen atoms or nitrogen-containing groups by reaction with amines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/91—Polymers modified by chemical after-treatment
-
- 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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
-
- 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
Abstract
The invention discloses an anti-sagging resin, a preparation method and application thereof in preparing low-temperature baking paint, wherein the preparation method comprises the following steps: adding phenethylamine solution into resin, stirring, and dripping 1, 6-hexanediIsocyanate solution, reacting to obtain anti-sagging resin containing compound shown in structure (I):
Description
Technical Field
The invention belongs to the field of paint, and particularly relates to anti-sagging resin, a preparation method and application thereof in preparing low-temperature baking paint.
Background
SCA (Sag Control Agent) "sag control agent" or "anti-sag agent". The auxiliary agent is widely applied to the field of paint and is used for preventing the paint from sagging. The action mechanism is as follows: when in static storage, the anti-sagging agent can form a three-dimensional net structure to restrict the flow of the paint through hydrogen bond interaction because no external force is applied, so that the paint shows higher initial viscosity; in the process of construction spraying, the three-dimensional net structure is destroyed due to the action of a certain shearing force, and the paint flows more easily so as to show lower viscosity, thus being more beneficial to construction and leveling; after the external force is removed, the three-dimensional net structure is quickly constructed, and the viscosity is restored to a higher value, so that the sagging phenomenon is avoided.
Traditional anti-sagging agents, including bentonite, fumed silica, polyamide wax and the like, have large addition amount, and can be uniformly dispersed only by high shearing force during production, thus being easy to cause dust pollution. More importantly, they cannot be added to varnishes, since these products have a negative effect on the gloss and transparency of the paint film, whereas the bisurea anti-sagging agents overcome the above drawbacks. In the baking process, the biurea group can react with amino resin in the curing agent to finally become transparent, and the transparency of a paint film is not affected.
The preparation of bisurea compounds (II) is described, for example, in U.S. Pat. No. 4,20324 B1, the structural formula of which is shown below:
the biuret compound is prepared from benzylamine and 1, 6-hexamethylene diisocyanate, is widely applied to the field of anti-sagging agents of coatings, has excellent anti-sagging performance, can become transparent under the condition of baking at 140 ℃, but can not meet the requirement of becoming transparent at lower baking temperature. In the large background of carbon neutralization, how to prepare anti-sagging agents that can be baked at lower temperatures to become transparent to reduce energy consumption is a problem to be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides anti-sagging resin.
The second object of the invention is to provide a method for preparing sag resistant resin.
The third object of the invention is to provide an application of sagging-resistant resin in preparing low-temperature baking paint coating.
The technical scheme of the invention is summarized as follows:
a preparation method of sag-resistant resin comprises the following steps:
adding a phenethylamine solution into the resin, stirring uniformly, then dripping a 1, 6-hexamethylene diisocyanate solution, and reacting to obtain the anti-sagging resin containing the compound shown in the structure (I):
the mass ratio of the phenethylamine, the resin and the 1, 6-hexamethylene diisocyanate is 2.96-5.92:80-90:2.04-4.08.
The solvent of the phenethylamine solution is at least one of aromatic hydrocarbon 100, toluene, paraxylene and butyl acetate; the solvent of the 1, 6-hexamethylene diisocyanate solution is at least one of aromatic hydrocarbon 100, toluene, paraxylene and butyl acetate.
The resin is polyester resin or acrylic resin.
The polyester resin is at least one of SN805, SY961, CFR8675, ETERKYD 50031, ETERKYD 50141-TK-40 and ETERKYD 5019-R-40.
The acrylic resin is at least one of CY951, FX-W9286, HU56020, ETERAC 72827, WAP-347, setalux1184 and Setalux 1753.
The reaction conditions are as follows: stirring at 0-25 deg.c and 300-600 rpm.
The sagging-resistant resin prepared by the preparation method.
The sagging resistant resin is applied to preparing low-temperature baking paint.
The invention has the advantages that:
compared with the anti-sagging resin (II), the anti-sagging resin provided by the invention has higher anti-sagging value, and the anti-sagging resin reaches more than 275 mu m under the proportion of the experimental coating.
Compared with the anti-sagging resin (II), the anti-sagging resin provided by the invention has the advantages that the temperature required for transparency change is lower and is 120 ℃, and the energy consumption can be greatly reduced. Is suitable for being applied to preparing low-temperature baking paint coatings.
Detailed Description
The invention is further illustrated by the following specific examples. It will be appreciated by persons skilled in the art that the particular embodiments described herein are illustrative only and are not limiting of the invention.
The experimental methods used in the embodiments are all conventional methods unless otherwise specified; the materials used, the reagent lamps, unless otherwise specified, are all commercially available.
The varnish base material used in the invention is prepared by self, and the ingredients are listed below.
TABLE 1 varnish base formulation table
The varnish curing agent used in the invention adopts HDI isocyanate solvent HDI trimer yellowing-resistant curing agent, and is purchased from Aloqi chemical industry Co.
Example 1
A preparation method of sag-resistant resin comprises the following steps:
to a 250mL three-necked flask equipped with a mechanical stirrer, a thermometer and a dropping funnel, 90.00g of an acrylic resin CY951 was added, and a solution obtained by mixing 2.96g (24.46 mmol) of phenethylamine with 2.96g of aromatic hydrocarbon 100 was added and stirred uniformly; another 50mL beaker was added to a solution obtained by mixing 2.04g (12.14 mmol) of 1, 6-hexamethylene diisocyanate and 2.04g of aromatic hydrocarbon 100, and the mixture was transferred to a dropping funnel after stirring uniformly, and the mixture was added dropwise with stirring at a stirring rate of 300rpm at 0 ℃. And (3) carrying out a total reaction for 30min from the beginning of dripping to obtain the milky anti-sagging resin.
And (3) detection: adding a small amount of the anti-sagging resin into a centrifuge tube, adding ethanol, and performing ultrasonic dispersion for 10min. Centrifuging at 10000rpm for 10min in a centrifuge, removing supernatant, adding ethanol, and performing ultrasonic dispersion and centrifugal separation twice to wash off acrylic resin CY951 to obtain white solid powder. Via nuclear magnetic detection 1 H NMR(DMSO-d 6 ) Delta 7.43-7.14 (m, 10H), 5.91-5.70 (m, 4H), 3.20 (q, J=6.6 Hz, 4H), 2.95 (q, J=6.9, 6.5Hz, 4H), 2.66 (t, J=7.4 Hz, 4H), 1.39-1.19 (m, 8H), and the structural formula is shown as (I):
the application of the sagging resistant resin in preparing low-temperature baking paint coating comprises the following steps:
2.50g of the anti-sagging resin was placed in a 50mL beaker, 7.50g of the varnish base was added and stirred at 300rpm for 10min. Then 3.33g of varnish curing agent is added and stirred for 1min to obtain the low-temperature baking varnish coating.
Blade coating experiment: 5.00g of the paint is taken on a paperboard, the paperboard is uniformly scraped by a sagging coater, the paperboard is vertically placed, and after the paperboard is naturally air-dried, the sagging resistance value of the paperboard is detected to be 275 mu m.
Baking experiment: another 5.00g of the coating was applied to a transparent glass plate, which was spread uniformly with a sagging coater, and the glass plate was heated on a constant temperature heating table, and the temperature at which it became transparent was measured at 120℃for 30 minutes.
Example 2
A preparation method of sag-resistant resin comprises the following steps:
to a 250mL three-necked flask equipped with a mechanical stirrer, a thermometer and a dropping funnel, 85.00g of acrylic resin ETERAC 72827 was added, and a solution obtained by mixing 4.44g (36.69 mmol) of phenethylamine and 4.44g of butyl acetate was added and stirred uniformly; a50 mL beaker was additionally charged with a solution obtained by mixing 3.06g (18.21 mmol) of 1, 6-hexamethylene diisocyanate and 3.06g of butyl acetate, and after stirring uniformly, the mixture was transferred to a dropping funnel, stirred at 10℃and stirring rate of 400rpm, and added dropwise. And (3) carrying out a total reaction for 30min from the beginning of dripping to obtain the milky anti-sagging resin.
And (3) detection: a small amount of the anti-sagging resin is taken to obtain solid powder according to the detection mode described in the example 1, and the structure of the anti-sagging resin is shown as a formula I after nuclear magnetism detection.
Experiments prove that acrylic resin FX-W9286, HU56020, WAP-347, setalux1184 and mass ratio are 1:1 and Setalux1184 and Setalux 1753 instead of the acrylic resin eteac 72827 of this example, otherwise identical to this example, anti-sagging resins containing the compound of structure (I) were each obtained.
The application of the sagging resistant resin in preparing low-temperature baking paint coating comprises the following steps:
2.50g of the anti-sagging resin was placed in a 50mL beaker, 7.50g of the varnish base was added and stirred at 300rpm for 10min. Then 3.33g of varnish curing agent is added and stirred for 1min to obtain the low-temperature baking varnish coating.
Blade coating experiment: 5.00g of the paint is taken on a paperboard, the paperboard is uniformly scraped by a sagging coater, the paperboard is vertically placed, and after the paperboard is naturally air-dried, the sagging resistance value of the paperboard is detected to be 275 mu m.
Baking experiment: another 5.00g of the coating was applied to a transparent glass plate, which was spread uniformly with a sagging coater, and the glass plate was heated on a constant temperature heating table, and the temperature at which it became transparent was measured at 120℃for 30 minutes.
Example 3
A preparation method of sag-resistant resin comprises the following steps:
to a 250mL three-necked flask equipped with a mechanical stirrer, a thermometer and a dropping funnel, 80.00g of polyester resin SY961 was added, and a solution obtained by mixing 5.92g (48.92 mmol) of phenethylamine, 2.96g of toluene and 2.96g of p-xylene was added and stirred uniformly. A50 mL beaker was additionally charged with a solution obtained by mixing 4.08g (24.28 mmol) of 1, 6-hexamethylene diisocyanate, 2.04g of toluene and 2.04g of paraxylene, and the mixture was transferred to a dropping funnel after stirring uniformly, stirred at 25℃and stirring rate of 600rpm, and then added dropwise. And (3) carrying out a total reaction for 30min from the beginning of dripping to obtain the milky anti-sagging resin.
And (3) detection: a small amount of the anti-sagging resin is taken to obtain solid powder according to the detection mode described in the example 1, and the structure of the anti-sagging resin is shown as a formula I after nuclear magnetism detection.
Experiments prove that the polyester resin SN805, CFR8675, ETERKYD 50031, ETERKYD 50141-TK-40, ETERKYD 5019-R-40 or the mass ratio is 1:1 and CFR8675 instead of the polyester resin SY961 in this example, other than this example, anti-sagging resins containing the compound represented by structure (I) were obtained, respectively.
The application of the sagging resistant resin in preparing low-temperature baking paint coating comprises the following steps:
2.50g of the anti-sagging resin was placed in a 50mL beaker, 7.50g of the varnish base was added and stirred at 300rpm for 10min. Then 3.33g of varnish curing agent is added and stirred for 1min to obtain the low-temperature baking varnish coating.
Blade coating experiment: 5.00g of the paint is taken on a paperboard, the paperboard is uniformly scraped by a sagging coater, the paperboard is vertically placed, and after the paperboard is naturally air-dried, the sagging resistance value of the paperboard is detected to be 275 mu m.
Baking experiment: another 5.00g of the coating was applied to a transparent glass plate, which was spread uniformly with a sagging coater, and the glass plate was heated on a constant temperature heating table, and the temperature at which it became transparent was measured at 120℃for 30 minutes.
Comparative example 1
To a 250mL three-necked flask equipped with a mechanical stirrer, a thermometer and a dropping funnel was added a solution obtained by mixing 90.00g (26.17 mmol) of acrylic resin CY951,2.80g (26.17 mmol) of benzylamine and 2.80g of aromatic hydrocarbon 100, and the mixture was stirred uniformly; another 50mL beaker was added to a solution obtained by mixing 2.20g (13.10 mmol) of 1, 6-hexamethylene diisocyanate and 2.20g of aromatic hydrocarbon 100, and the mixture was transferred to a dropping funnel after stirring uniformly, and was added dropwise at 25℃and stirring rate of 300 rpm. And (3) carrying out a total reaction for 30min from the beginning of dripping to obtain the milky anti-sagging resin.
And (3) detection: adding a small amount of the anti-sagging resin into a centrifuge tube, adding ethanol, and performing ultrasonic dispersion for 10min. Centrifuging at 10000rpm for 10min, removing supernatant, and adding ethanolThe alcohol was further subjected to ultrasonic dispersion and centrifugal separation twice to wash off the acrylic resin CY951, to obtain a white solid powder. Via nuclear magnetic detection 1 H NMR(DMSO-d 6 ) Delta 7.21 (d, j=55.7 hz, 10H), 6.21 (s, 2H), 5.86 (s, 2H), 4.15 (s, 4H), 2.95 (s, 4H), 1.32 (s, 4H), 1.20 (s, 4H), the structural formula of which is shown as (ii):
the application of the sagging resistant resin II in preparing the paint comprises the following steps:
2.50g of the anti-sagging resin was placed in a 50mL beaker, 7.50g of the varnish base was added and stirred at 300rpm for 10min. Then, 3.33g of a varnish curing agent was added and stirred for 1min to obtain a coating.
Blade coating experiment: 5.00g of the paint is taken on a paperboard, the paperboard is uniformly scraped by a sagging coater, the paperboard is vertically placed, and after the paperboard is naturally air-dried, the sagging resistance value of the paperboard is detected to be 225 mu m.
Baking experiment: another 5.00g of the coating was applied to a transparent glass plate, which was spread uniformly with a sagging coater, and the glass plate was heated on a constant temperature heating table, and the temperature at which it became transparent was measured at 140℃for 30 minutes.
The biurea anti-sagging resins with different structures are prepared based on the above examples and comparative examples, and the results of the doctor blade test and the baking test are as follows:
TABLE 2 scratch test results summary table
The maximum film thickness of the thickness gauge used in the invention is 275 μm, and sag resistance values of the sag resistant resin coating prepared in examples 1-3 are all higher than 275 μm, and the maximum film thickness obtained by measurement is recorded since 275 μm or more is not in the measurement range.
TABLE 3 summary of baking and coating experimental results
The performances of different examples and comparative examples are compared, and the anti-sagging resin prepared by the invention not only has excellent anti-sagging performance, but also becomes transparent at lower baking temperature, thus greatly reducing energy consumption.
Claims (9)
1. A preparation method of sag-resistant resin is characterized by comprising the following steps:
adding a phenethylamine solution into the resin, stirring uniformly, then dripping a 1, 6-hexamethylene diisocyanate solution, and reacting to obtain the anti-sagging resin containing the compound shown in the structure (I):
2. the preparation method according to claim 1, wherein the mass ratio of the phenethylamine, the resin and the 1, 6-hexamethylene diisocyanate is 2.96-5.92:80-90:2.04-4.08.
3. The preparation method according to claim 1, wherein the solvent of the phenethylamine solution is at least one of aromatic hydrocarbon 100, toluene, paraxylene and butyl acetate; the solvent of the 1, 6-hexamethylene diisocyanate solution is at least one of aromatic hydrocarbon 100, toluene, paraxylene and butyl acetate.
4. The production method according to claim 1 or 2, characterized in that the resin is a polyester resin or an acrylic resin.
5. The method according to claim 4, wherein the polyester resin is at least one of SN805, SY961, CFR8675, ETERKYD 50031, ETERKYD 50141-TK-40 and ETERKYD 5019-R-40.
6. The method according to claim 4, wherein the acrylic resin is at least one of CY951, FX-W9286, HU56020, ETERAC 72827, WAP-347, setalux1184 and Setalux 1753.
7. The preparation method according to claim 1, wherein the reaction conditions are: stirring at 0-25 deg.c and 300-600 rpm.
8. Anti-sagging resin prepared by the preparation method of any one of claims 1 to 7.
9. Use of the sag resistant resin according to claim 8 for the preparation of low temperature stoving varnish coatings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310198373.3A CN116375909A (en) | 2023-03-03 | 2023-03-03 | Sagging-resistant resin, preparation method and application thereof in preparation of low-temperature baking paint coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310198373.3A CN116375909A (en) | 2023-03-03 | 2023-03-03 | Sagging-resistant resin, preparation method and application thereof in preparation of low-temperature baking paint coating |
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| Publication Number | Publication Date |
|---|---|
| CN116375909A true CN116375909A (en) | 2023-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310198373.3A Pending CN116375909A (en) | 2023-03-03 | 2023-03-03 | Sagging-resistant resin, preparation method and application thereof in preparation of low-temperature baking paint coating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116375909A (en) |
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- 2023-03-03 CN CN202310198373.3A patent/CN116375909A/en active Pending
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