CN106046332A - Low-VOC-content alkyd resin and application of low-VOC-content alkyd resin in coating - Google Patents
Low-VOC-content alkyd resin and application of low-VOC-content alkyd resin in coating Download PDFInfo
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- CN106046332A CN106046332A CN201610368951.3A CN201610368951A CN106046332A CN 106046332 A CN106046332 A CN 106046332A CN 201610368951 A CN201610368951 A CN 201610368951A CN 106046332 A CN106046332 A CN 106046332A
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- 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
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/46—Polyesters chemically modified by esterification
- C08G63/48—Polyesters chemically modified by esterification by unsaturated higher fatty oils or their acids; by resin acids
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- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/08—Polyesters modified with higher fatty oils or their acids, or with natural resins or resin acids
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Abstract
The invention discloses a low-VOC-content alkyd resin and application of the low-VOC-content alkyd resin in a coating. The low-VOC-content alkyd resin is prepared from, by weight, 10-15 parts of neopentyl glycol, 8-10 parts of dimethyl benzene, 26-30 parts of vegetable oil fatty acid, 8-12 parts of succinic acid, 18-20 parts of phthalic anhydride, 0.05-0.1 part of p-toluene sulfonic acid, 2-3 parts of rosin, 1-2 parts of benzoic acid, 10-15 parts of 200# solvent oil, 10-12 parts of dimethyl carbonate and 2-6 parts of turpentine. The alkyd resin has high solid content and low viscosity, fundamentally reduces the VOC content effectively, makes the alkyd resin coating have the advantages of being environmentally friendly and non-toxic while ensuring high performance and has good market response.
Description
Technical field
The invention belongs to macromolecule synthesising technology field, be specifically related to the alkyd resin of a kind of low VOC content and be coated with
Application in material.
Technical background
Alkyd resin, as a kind of important binding agent, is mainly used as paint field.Due to alkyd resin cost of material just
Preferably, most raw materials are reproducible compound, and recent years alkyd resin increasingly causes the concern of people, and alkyd resin is at coating
In occupation of higher proportion in industry.
In alkyd resin building-up process, often use volatile organic chemistry material (VOC) as solvent, the discharge of solvent
Environment and human body all can be caused the impact of serious harm.In recent years, the most the content of VOC in coating is strictly limited,
Reduce VOC content to reduce the injury to human body.At present, most short oil and medium oil alkyd have higher gluing
Degree, solids content is relatively low, and comparatively speaking, VOC content is higher.In order to reduce the discharge of VOC, optimal path is in preparation process
Improve the amount of solid content of resin, thus reduce the consumption of organic solvent.
Now, along with developing rapidly of Chinese manufacturing, the production to phthalic resin coating of the fierce market competition environment
It is proposed higher requirement with aspects such as uses.The phthalic resin coating provided in the market generally also exists gloss loss
Height, the defect such as the fast and poor adhesive force of fading.In order to meet the market demand, this has researched and developed the alkyd tree of a kind of excellent performance
Grease coating material, includes the advantage such as safety of relatively low VOC content, protection human body and environment, and market reaction is good.
Summary of the invention
The technical problem to be solved is to provide the alkyd resin of a kind of low VOC content and answering at coating thereof
With, prepared alkyd resin, there is higher solids content and relatively low viscosity, thus reduce the content of VOC, and then reduce
The organic solvent burst size to environment, meet the requirement of environmental protection.The cost of material that the present invention uses is cheap and readily available, and fundamentally
Can reduce the viscosity of resin, reduce the discharge of VOC, prepared medium oil alkyd is non-yellowing, and has preferable performance.
Realize the purpose of the present invention to be adopted the technical scheme that:
The alkyd resin of a kind of low VOC content, is joined part by following raw materials according according to weight and makes: neopentyl glycol 10～15 parts,
Dimethylbenzene 8～10 parts, vegetable fatty acids 26～30 parts, succinic acid 8～12 parts, phthalic anhydride 18～20 parts, to toluene
Sulfonic acid 0.05～0.1 part, Colophonium 2～3 parts, benzoic acid 1～2 parts, 200#Solvent naphtha 10～15 parts, dimethyl carbonate 10～12
Part, Oleum Terebinthinae 2～6 parts, wherein p-methyl benzenesulfonic acid uses as catalyst；
The alkyd resin of a kind of low VOC content, specifically comprises the following steps that
(1) at N2Under the conditions of, proportionally, in reaction vessel, add neopentyl glycol and dimethylbenzene, be warming up to 120～
150 DEG C, start stirring to backflow；
(2) in the system of step (1) gained, proportionally, vegetable fatty acids, succinic acid, phthalic acid are added
Acid anhydride, p-methyl benzenesulfonic acid, be warming up to 180 DEG C to being completely dissolved, be continuously heating to 220～260 DEG C, insulation 2.5～3.5h carries out ester
Changing reaction, the water in question response system completely removes；
(3) being cooled to 200 DEG C, in the system of step (2) gained, proportionally add Colophonium, benzoic acid, reflux diformazan
Benzene, is continuously heating to 240 DEG C, is incubated 1h, surveys acid number≤10mg KOH/g, and grignard pipe viscosity is 4～6 seconds/25 DEG C；
(4) it is cooled to 170 DEG C～180 DEG C, is proportionally added into 200#Solvent naphtha, dimethyl carbonate, Oleum Terebinthinae carry out latting drown,
Regulation solid content, to 70～about 75%, filters and i.e. obtains alkyd resin finished product.
The application of the alkyd resin of described low VOC content, it is characterised in that preparing the alkyd resin of low VOC content
Application in terms of coating.
The phthalic resin coating of described low VOC content, is made up of following components in parts by weight, the alkyd of low VOC content
Resin 40～50 parts, pigment A 7～10 parts, pigment B 2～5 parts, dispersant 0.1～0.3 part, CD-1 sagging inhibitor
0.5～1 part, filler A 20～30 parts, filler B 10～15 parts, auxiliary agent 0.1～0.2 part, solvent 3～5 parts.
Described auxiliary agent, dispersant are selected from this area conventional reagent；
Described solvent is selected from this area Conventional solvents or the combination of several Conventional solvents；
The alkyd resin of described low VOC content, described alkyd resin belongs to medium oil, and oil content is 55%, acid number≤
10mgKOH/g, solid content is 70～75%, and grignard pipe viscosity is 4～6 seconds/25 DEG C.
Advantages of the present invention and effect:
Neopentyl glycol in the present invention, can make alkyd resin relative molecular weight distribution uniform, increases the dissolubility of resin, fall
Low resin system viscosity, and increase guarantor's light colour retention, hardness and non-oxidizability；
Succinic acid in the present invention, the aliphatic carbon chain being had due to itself, relative to traditional unsaturated fatty acid,
Prepared resin has relatively low viscosity；It is possible to additionally incorporate phthalic anhydride, hardness and the water-resistance of resin can be improved；
Colophonium in the present invention and benzoic acid, primarily serve the purpose of chain termination agent, the molecular weight of regulation alkyd resin, reduce tree
Resin system viscosity, increases alkyd resin dissolubility in retarder thinner, and can increase adhesive force, protect light colour retention and gloss.
Retarder thinner in the present invention is 200#One or several compositions in solvent naphtha, dimethyl carbonate, Oleum Terebinthinae.
Dimethyl carbonate belongs to " green " solvent, and price is relatively low, and dissolving power is relatively strong, reduces resin system viscosity, can be configured to solid and contain
Measure higher alkyd resin, reduce VOC content；And 200#Solvent naphtha is easy to get and toxicity is relatively low, and has stronger dissolubility；Add
Enter Oleum Terebinthinae and increase drying property and the durability of resin.Through inventor's long-term experiment exploration discovery, use above-mentioned ratio phase
Optimal effect can be obtained mutually during mixing.
The alkyd resin solid content that the present invention prepares is up to about 75%, and viscosity is relatively low, fundamentally decreases VOC and contains
Amount, meet the requirement of environmental protection, and there is preferable performance.
Detailed description of the invention
In order to be more fully understood that the present invention, describe technical scheme in detail with instantiation below, but this
Invention is not limited thereto.
Embodiment 1.
The raw material weight proportioning of the alkyd resin of the present embodiment low VOC content is: neopentyl glycol 15 parts, dimethylbenzene 10 parts,
Vegetable fatty acids 30 parts, succinic acid 9 parts, phthalic anhydride 18 parts, p-methyl benzenesulfonic acid 0.1 part, Colophonium 2 parts, benzoic acid 1
Part, 200# solvent naphtha 12 parts, dimethyl carbonate 10 parts, Oleum Terebinthinae 3 parts.
Described alkyd resin is prepared by following step: the first step, at N2Under the conditions of, depend in proportion in reactor
Secondary addition neopentyl glycol and dimethylbenzene, be warming up to 120 DEG C, starts stirring to backflow；Second step, is sequentially added into vegetable oil in proportion
Fatty acid, succinic acid, phthalic anhydride, p-methyl benzenesulfonic acid, be warming up to 180 DEG C to being completely dissolved, be continuously heating to 220 DEG C,
Insulation 2.5h carries out esterification, makes the water in reaction system completely remove；3rd step, is cooled to 200 DEG C, adds the most successively
Entering Colophonium, benzoic acid, reflux dimethylbenzene, is continuously heating to 240 DEG C, is incubated 1h, surveys acid number≤10mg KOH/g, viscosimetric；The
Four steps, are cooled to 170 DEG C, are sequentially added into 200# solvent naphtha in proportion, dimethyl carbonate, Oleum Terebinthinae carry out latting drown, and regulation contains admittedly
Amount, to 70%, filters and i.e. obtains alkyd resin finished product.
The phthalic resin coating of low VOC content, its proportioning raw materials is as follows: the alkyd resin of low VOC content 40 parts, big beauty
Material A 7 parts, pigment B 2 parts, dispersant 0.1 part, CD-1 sagging inhibitor 0.5 part, filler A 20 parts, filler B 10 parts, respectively
Plant auxiliary agent 0.1 part, make mixed solvent 3 parts by oneself.
Described phthalic resin coating is prepared by following step: according to above-mentioned ratio, by above-mentioned homemade alkyd
Resin, dispersant and part mixed solvent low speed stir, and put into CD-1 sagging inhibitor, stir under 500r/min rotating speed
After mixing uniformly, (2000r/min) stirring 10min, then reduction of speed, is slowly added to pigment A, B and filler, and part at a high speed
Auxiliary agent and mixed solvent, stir under the rotating speed of 600r/min, then open and reach to fineness to 2000r/min dispersed with stirring at a high speed
To 30 μm, add residual solvent and auxiliary agent is qualified to viscosity, filter, stand 24h, obtain the phthalic resin coating of low VOC content.
Embodiment 2.
The raw material weight proportioning of the alkyd resin of the present embodiment low VOC content is: neopentyl glycol 11 parts, and dimethylbenzene 8 parts is planted
Thing fatty acid oil 28 parts, succinic acid 10 parts, phthalic anhydride 20 parts, p-methyl benzenesulfonic acid 0.05 part, Colophonium 3 parts, benzoic acid 2
Part, 200# solvent naphtha 10 parts, dimethyl carbonate 10 parts, Oleum Terebinthinae 6 parts.
Described alkyd resin is prepared by following step: the first step, at N2Under the conditions of, depend in proportion in reactor
Secondary addition neopentyl glycol and dimethylbenzene, be warming up to 150 DEG C, starts stirring to backflow；Second step, is sequentially added into vegetable oil in proportion
Fatty acid, succinic acid, phthalic anhydride, p-methyl benzenesulfonic acid, be warming up to 180 DEG C to being completely dissolved, be continuously heating to 260 DEG C,
Insulation 3.5h carries out esterification, makes the water in reaction system completely remove；3rd step, is cooled to 200 DEG C, adds the most successively
Entering Colophonium, benzoic acid, reflux dimethylbenzene, is continuously heating to 240 DEG C, is incubated 1h, surveys acid number≤10mg KOH/g, viscosimetric；The
Four steps, are cooled to 180 DEG C, are sequentially added into 200# solvent naphtha in proportion, dimethyl carbonate, Oleum Terebinthinae carry out latting drown, and regulation contains admittedly
Amount, to 75%, filters and i.e. obtains alkyd resin finished product.
The phthalic resin coating of low VOC content, its proportioning raw materials is as follows: the alkyd resin of low VOC content 45 parts, big beauty
Material A 8 parts, pigment B 3 parts, dispersant 0.2 part, CD-1 sagging inhibitor 0.8 part, filler A 27 parts, filler B 14 parts, respectively
Plant auxiliary agent 0.2 part, make mixed solvent 4 parts by oneself.
Described phthalic resin coating is prepared by following step: according to above-mentioned ratio, by above-mentioned homemade alkyd
Resin, dispersant and part mixed solvent low speed stir, and put into CD-1 sagging inhibitor, stir under 500r/min rotating speed
After mixing uniformly, (2000r/min) stirring 10min, then reduction of speed, is slowly added to pigment A, B and filler, and part at a high speed
Auxiliary agent and mixed solvent, stir under the rotating speed of 600r/min, then open and reach to fineness to 2000r/min dispersed with stirring at a high speed
To 30 μm, add residual solvent and auxiliary agent is qualified to viscosity, filter, stand 24h, obtain the phthalic resin coating of low VOC content.
Embodiment 3.
The raw material weight proportioning of the alkyd resin of the present embodiment low VOC content is: neopentyl glycol 10 parts, and dimethylbenzene 8 parts is planted
Thing fatty acid oil 26 parts, succinic acid 12 parts, phthalic anhydride 18 parts, p-methyl benzenesulfonic acid 0.1 part, Colophonium 3 parts, 2 parts of benzoic acid,
200# solvent naphtha 14 parts, dimethyl carbonate 12 parts, Oleum Terebinthinae 4 parts.
Described alkyd resin is prepared by following step: the first step, at N2Under the conditions of, depend in proportion in reactor
Secondary addition neopentyl glycol and dimethylbenzene, be warming up to 130 DEG C, starts stirring to backflow；Second step, is sequentially added into vegetable oil in proportion
Fatty acid, succinic acid, phthalic anhydride, p-methyl benzenesulfonic acid, be warming up to 180 DEG C to being completely dissolved, be continuously heating to 230 DEG C,
Insulation 2.7h carries out esterification, makes the water in reaction system completely remove；3rd step, is cooled to 200 DEG C, adds the most successively
Entering Colophonium, benzoic acid, reflux dimethylbenzene, is continuously heating to 240 DEG C, is incubated 1h, surveys acid number≤10mg KOH/g, viscosimetric；The
Four steps, are cooled to 173 DEG C, are sequentially added into 200# solvent naphtha in proportion, dimethyl carbonate, Oleum Terebinthinae carry out latting drown, and regulation contains admittedly
Amount, to 73%, filters and i.e. obtains alkyd resin finished product.
The phthalic resin coating of low VOC content, its proportioning raw materials is as follows: the alkyd resin of low VOC content 50 parts, big beauty
Material A 10 parts, pigment B 5 parts, dispersant 0.3 part, CD-1 sagging inhibitor 1 part, filler A 30 parts, filler B 15 parts, various
Auxiliary agent 0.2 part, makes mixed solvent 5 parts by oneself.
Described phthalic resin coating is prepared by following step: according to above-mentioned ratio, by above-mentioned homemade alkyd
Resin, dispersant and part mixed solvent low speed stir, and put into CD-1 sagging inhibitor, stir under 500r/min rotating speed
After mixing uniformly, (2000r/min) stirring 10min, then reduction of speed, is slowly added to pigment A, B and filler, and part at a high speed
Auxiliary agent and mixed solvent, stir under the rotating speed of 600r/min, then open and reach to fineness to 2000r/min dispersed with stirring at a high speed
To 30 μm, add residual solvent and auxiliary agent is qualified to viscosity, filter, stand 24h, obtain the phthalic resin coating of low VOC content.
Embodiment 4.
The raw material weight proportioning of the alkyd resin of the present embodiment low VOC content is: neopentyl glycol 15 parts, dimethylbenzene 10 parts,
Vegetable fatty acids 30 parts, succinic acid 8 parts, phthalic anhydride 18 parts, p-methyl benzenesulfonic acid 0.1 part, Colophonium 3 parts, benzoic acid 1
Part, 200# solvent naphtha 13 parts, dimethyl carbonate 10 parts, Oleum Terebinthinae 2 parts.
Described alkyd resin is prepared by following step: the first step, at N2Under the conditions of, depend in proportion in reactor
Secondary addition neopentyl glycol and dimethylbenzene, be warming up to 150 DEG C, starts stirring to backflow；Second step, is sequentially added into vegetable oil in proportion
Fatty acid, succinic acid, phthalic anhydride, p-methyl benzenesulfonic acid, be warming up to 180 DEG C to being completely dissolved, be continuously heating to 240 DEG C,
Insulation 3.2h carries out esterification, makes the water in reaction system completely remove；3rd step, is cooled to 200 DEG C, adds the most successively
Entering Colophonium, benzoic acid, reflux dimethylbenzene, is continuously heating to 240 DEG C, is incubated 1h, surveys acid number≤10mg KOH/g, viscosimetric；The
Four steps, are cooled to 176 DEG C, are sequentially added into 200# solvent naphtha in proportion, dimethyl carbonate, Oleum Terebinthinae carry out latting drown, and regulation contains admittedly
Amount, to 74%, filters and i.e. obtains alkyd resin finished product.
The phthalic resin coating of low VOC content, its proportioning raw materials is as follows: the alkyd resin of low VOC content 50 parts, big beauty
Material A 7 parts, pigment B 2 parts, dispersant 0.1 part, CD-1 sagging inhibitor 1 part, filler A 28 parts, filler B 12 parts, various
Auxiliary agent 0.1 part, makes mixed solvent 4 parts by oneself.
Described phthalic resin coating is prepared by following step: according to above-mentioned ratio, by above-mentioned homemade alkyd
Resin, dispersant and part mixed solvent low speed stir, and put into CD-1 sagging inhibitor, stir under 500r/min rotating speed
After mixing uniformly, (2000r/min) stirring 10min, then reduction of speed, is slowly added to pigment A, B and filler, and part at a high speed
Auxiliary agent and mixed solvent, stir under the rotating speed of 600r/min, then open and reach to fineness to 2000r/min dispersed with stirring at a high speed
To 30 μm, add residual solvent and auxiliary agent is qualified to viscosity, filter, stand 24h, obtain the phthalic resin coating of low VOC content.
Experimental example
According to relevant national standard, the alkyd resin of low VOC content and the key property of coating thereof to the present invention are carried out
Detection, test result is as shown in table 1.
The alkyd resin key property test result of table 1 low VOC content
As can be seen from Table 1, the properties of the alkyd resin of the low VOC content produced according to embodiments of the present invention is good
Good.
According to relevant criterion, the key property of the phthalic resin coating of the low VOC content in embodiment 2 is detected,
Test result is as shown in table 2.
The high-solid lower-viscosity type phthalic resin coating testing result of low VOC content in table 2 embodiment 2
| Detection project | Performance indications | Testing result | Conclusion | Detection method |
| Outward appearance | Paint film flat smooth | Qualified | Qualified | Ocular estimate |
| Delivery time/s | ≤80 | 73 | Qualified | GB/T 1723—1993 |
| Adhesive force/level | ≤2 | 2 | Qualified | GB/T 1720—1979(1989) |
| Fineness/μm | ≤35 | 15 | Qualified | GB/T 6753.4—1998 |
| Surface drying time/h | ≤4 | 3 | Qualified | GB/T 1728—1979 |
| Do solid work the time/h | ≤24 | 20 | Qualified | GB/T 1728—1979 |
| Covering power (g m-2) | ≤180 | 160 | Qualified | GB/T 1726—1979 |
| 60 ° of gloss | ≥80 | 75 | Qualified | GB/T 9754—2007 |
| Double pendulum hardness | ≥0.2 | 0.2 | Qualified | GB/T 1730—2007 |
| Application property | During brushing accessible | Qualified | Qualified | GB/T 6753.6—1986 |
| Flash-point/DEG C | ≥30 | 28 | Qualified | GB/T 6753.5—1986 |
As can be seen from Table 2, the properties of the phthalic resin coating of the low VOC content produced according to embodiments of the present invention
Well.
Claims (4)
1. the alkyd resin of a low VOC content, it is characterised in that be made up according to weight portion of following raw materials according: neopentyl glycol 10
～15 parts, dimethylbenzene 8～10 parts, vegetable fatty acids 26～30 parts, succinic acid 8～12 parts, phthalic anhydride 18～20 parts,
P-methyl benzenesulfonic acid 0.05～0.1 part, Colophonium 2～3 parts, benzoic acid 1～2 parts, 200#Solvent naphtha 10～15 parts, dimethyl carbonate 10
～12 parts, Oleum Terebinthinae 2～6 parts.
2. the method preparing the alkyd resin of low VOC content as claimed in claim 1, it is characterised in that specifically comprise the following steps that
(1) at N2Under the conditions of, proportionally, in reaction vessel, add neopentyl glycol and dimethylbenzene, be warming up to 120～150 DEG C,
Start stirring to backflow；
(2) vegetable fatty acids, succinic acid, phthalic anhydride, right in the system of step (1) gained, proportionally, is added
Toluenesulfonic acid, be warming up to 180 DEG C to being completely dissolved, be continuously heating to 220～260 DEG C, it is anti-that insulation 2.5～3.5h carries out esterification
Should, the water in question response system completely removes；
(3) being cooled to 200 DEG C, in the system of step (2) gained, proportionally add Colophonium, benzoic acid, reflux dimethylbenzene,
Being continuously heating to 240 DEG C, be incubated 1h, survey acid number≤10mg KOH/g, grignard pipe viscosity is 4～6 seconds/25 DEG C；
(4) it is cooled to 170～180 DEG C, is proportionally added into 200#Solvent naphtha, dimethyl carbonate, Oleum Terebinthinae carry out latting drown, and regulation is solid
Content, to 70～75%, filters and i.e. obtains alkyd resin finished product.
3. the application of the alkyd resin of low VOC content as claimed in claim 1, it is characterised in that preparing low VOC content
Application in terms of phthalic resin coating.
4. the alkyd resin of low VOC content as claimed in claim 3 application in coating, it is characterised in that described is low
The phthalic resin coating of VOC content, is made up of following components in parts by weight, the alkyd resin 40 of low VOC content～50 parts, bright red
Pigment A 7～10 parts, pigment B 2～5 parts, dispersant 0.1～0.3 part, CD-1 sagging inhibitor 0.5～1 part, filler A 20
～30 parts, filler B 10～15 parts, auxiliary agent 0.1～0.2 part, solvent 3～5 parts.
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| CN112795287A (en) * | 2020-12-30 | 2021-05-14 | 天恒涂料有限公司 | Low-viscosity high-solid environment-friendly coating |
| CN114452922A (en) * | 2022-01-17 | 2022-05-10 | 江苏冠军科技集团股份有限公司 | Preparation device and method of high-solid-content low-VOC alkyd protective coating and application of coating |
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| CN107828053A (en) * | 2017-09-30 | 2018-03-23 | 合众（佛山）化工有限公司 | A kind of net taste alkyd resin of high-solid lower-viscosity and preparation method thereof |
| CN107828053B (en) * | 2017-09-30 | 2019-11-29 | 合众（佛山）化工有限公司 | A kind of high-solid lower-viscosity ordor removing alkyd resin and preparation method thereof |
| CN112795287A (en) * | 2020-12-30 | 2021-05-14 | 天恒涂料有限公司 | Low-viscosity high-solid environment-friendly coating |
| CN114452922A (en) * | 2022-01-17 | 2022-05-10 | 江苏冠军科技集团股份有限公司 | Preparation device and method of high-solid-content low-VOC alkyd protective coating and application of coating |
| CN114452922B (en) * | 2022-01-17 | 2023-10-20 | 江苏冠军科技集团股份有限公司 | Preparation device, method and application of high-solid low-VOC alkyd coating |
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