CN106085194A - A kind of waterborne polyester coating and preparation method thereof - Google Patents

A kind of waterborne polyester coating and preparation method thereof Download PDF

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Publication number
CN106085194A
CN106085194A CN201610550738.4A CN201610550738A CN106085194A CN 106085194 A CN106085194 A CN 106085194A CN 201610550738 A CN201610550738 A CN 201610550738A CN 106085194 A CN106085194 A CN 106085194A
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夏云
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ANHUI HEHAN OPTOELECTRONICS TECHNOLOGY Co Ltd
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ANHUI HEHAN OPTOELECTRONICS TECHNOLOGY Co Ltd
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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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/0804—Manufacture of polymers containing ionic or ionogenic groups
    • C08G18/0819—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups
    • C08G18/0823—Manufacture of polymers containing ionic or ionogenic groups containing anionic or anionogenic groups containing carboxylate salt groups or groups forming them
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/34—Carboxylic acids; Esters thereof with monohydroxyl compounds
    • C08G18/348—Hydroxycarboxylic acids
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4825—Polyethers containing two hydroxy groups
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/6692—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/34
    • 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
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/67—Unsaturated compounds having active hydrogen
    • C08G18/68—Unsaturated polyesters
    • C08G18/683—Unsaturated polyesters containing cyclic groups
    • C08G18/686—Unsaturated polyesters containing cyclic groups containing cycloaliphatic groups
    • 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
    • C08G63/52—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation
    • C08G63/54—Polycarboxylic acids or polyhydroxy compounds in which at least one of the two components contains aliphatic unsaturation the acids or hydroxy compounds containing carbocyclic rings
    • C08G63/553—Acids or hydroxy compounds containing cycloaliphatic rings, e.g. Diels-Alder adducts
    • 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
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/14—Paints containing biocides, e.g. fungicides, insecticides or pesticides
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant paints
    • 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
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Plant Pathology (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a kind of waterborne polyester coating, it is made up of the raw material of following weight parts: Colophonium 35 40, fumaric acid 8 10,20 30% sodium hydroxide solution 67, ethylene glycol 20 34, antimony oxide 0.1 0.2, sodium polyacrylate 23, zinc chloride 13 20, polyether Glycols 80 90, toluene di-isocyanate(TDI) 100 130,2,2 dihydromethyl propionic acid 23, diethylene glycol 45, triethylamine 12,2 mercaptobenzimidazole 0.2 0.4.The coating of the present invention has good toughness, and surface strength is high, and combination property is superior.

Description

A kind of waterborne polyester coating and preparation method thereof
Technical field
The present invention relates to polyester coating technical field, particularly relate to a kind of waterborne polyester coating and preparation method thereof.
Background technology
At present, although conventional water-base polyurethane material is widely used in coating, adhesive etc. due to its environmental friendliness Industry, but the water-base polyurethane material of routine yet suffers from thermostability and deficiency, the shadow such as weatherability is the best, antistatic behaviour is poor Ring its wider application to preferably improve the combination property of aqueous polyurethane coating, overcome himself exist water-fast Property poor, the shortcoming such as solid content is low, expand its range of application, the study on the modification to aqueous polyurethane has become a big heat in recent years Point, the degree of depth and the range of discussion the most more expand.The modification of aqueous polyurethane is broadly divided into two large divisions, and one is by poly-for aqueous ammonia Ester is composite modified with other materials, different according to modifying agent, the modification of aqueous polyurethane emulsion mainly have epoxy resin modification, third Olefin(e) acid is ester modified, it is nano-material modified etc. to add.Two is that the raw material to aqueous polyurethane is modified, introduce starch, cellulose, The biomass resources such as oils and fats, utilize its characteristic to improve a certain performance of aqueous polyurethane；
Aqueous polyurethane and the compound two ways that is broadly divided into of inorganic nano-particle, a kind of by montmorillonite, Muscovitum, Pulvis Talci etc. Filler adds in aqueous polyurethane, is prepared as phyllosilicate nano modified aqueous polyurethane composite；Another kind be by The nanoparticles such as silicon dioxide, zinc oxide, magnesium hydroxide, nano-cellulose add in water-base polyurethane material, are prepared as nothing Machine rigidity Nanocomposites water-base polyurethane material.Nano zine oxide, compared with common ZnO, has high chemically stable Property, the excellent properties such as relatively low dielectric constant, stronger ultraviolet and INFRARED ABSORPTION and catalysis activity, nano-ZnO is added In polyurethane, excellent in mechanical performance, uvioresistant, antistatic and the new function composite such as antibacterial can be prepared；
At present, remaining high of oil price, the production cost causing polyester and polyether polyol is also day by day to increase.People open Starting weight regards the intermediate that research and development are raw material production polyurethane with Renewable resource.Colophonium provides as the forestry biomass that China is important One of source, existing scholar's research adds it in the synthesis of polyurethane, to improve the property such as the gloss of polyurethane products, cohesiveness Can, but they are all directly to be added in polyurethane by Colophonium, and Colophonium is the mixture degree of functionality simultaneously of various kinds of resin acid The highest, it is impossible to join on the main chain of polyurethane, fail to significantly improve the performance so that product, it is impossible to give full play to the spy of Colophonium Property；Colophonium has that hardness is high, heat-resist and the good characteristic such as insulation, anticorrosion, if introducing it in polyurethane, permissible Overcome the shortcomings such as standard aqueous low, the heat-resisting poor water resistance of polyurethane hardness.But forefathers the most directly apply this mixing of Colophonium Thing, the structure of Colophonium is connected to the end of strand only as end-capping reagent, makes the performance of Colophonium can not obtain sufficient body Existing；.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of waterborne polyester coating and preparation side thereof Method.
The present invention is achieved by the following technical solutions:
A kind of waterborne polyester coating, it is made up of the raw material of following weight parts:
Colophonium 35-40, fumaric acid 8-10,20-30% sodium hydroxide solution 6-7, ethylene glycol 20-34, antimony oxide 0.1-0.2, Sodium polyacrylate 2-3, zinc chloride 13-20, polyether Glycols 80-90, toluene di-isocyanate(TDI) 100-130,2,2-dihydroxymethyl Propanoic acid 2-3, diethylene glycol 4-5, triethylamine 1-2,2-mercaptobenzimidazole 0.2-0.4.
The preparation method of a kind of described waterborne polyester coating, comprises the following steps；
(1) by Colophonium, fumaric acid mixing, 200-230 DEG C of insulation reaction 2.7-3 hour under nitrogen protection, it is cooled to 157-160 DEG C discharging, joins in the dehydrated alcohol of its weight 10-15 times, drips above-mentioned 20-30% sodium hydroxide solution, stirring to room temperature, Sucking filtration, vacuum drying, it is then added in the dehydrated alcohol of its weight 6-8 times, dropping concentration is the hydrochloric acid solution of 5-7%, regulates pH For 3-4, stir, obtain modified fumaropimaric acid；
(2) above-mentioned 2-mercaptobenzimidazole is joined in modified fumaropimaric acid, at 46-50 DEG C ultrasonic 2-3 minute, take out Filter, is vacuum dried precipitation, mixes with ethylene glycol, antimony oxide, be passed through nitrogen, and at 150-160 DEG C, stirring reaction 3-4 is little Time, rise high-temperature and be 210-220 DEG C, continue insulation 1.7-2 hour, cooling discharge, obtain modified poly ester polyhydric alcohol；
(3) being joined by above-mentioned sodium polyacrylate in the deionized water of its weight 80-100 times, drip acetic acid, regulation pH is 2-3, Adding zinc chloride, stir, the sodium hydroxide of dropping 3-5mol/l, regulation pH is 10-11, insulation reaction at 87-90 DEG C 3-5 hour, centrifugation, precipitation is washed 2-3 time, is vacuum dried 10-11 hour at 60-65 DEG C, obtains water-dispersion type zinc oxide；
(4) by above-mentioned polyether Glycols, the mixing of modified poly ester polyhydric alcohol, vacuum dehydration 2-3 hour at 118-130 DEG C, cooling To room temperature, mix with toluene di-isocyanate(TDI), insulation reaction 100-120 minute at 76-80 DEG C, add 2,2-dihydroxymethyl third Acid, continues insulation reaction 50-60 minute, adds above-mentioned diethylene glycol, and insulation reaction 4-5 hour at 57-60 DEG C is cooled to room Temperature, adds above-mentioned triethylamine, stirs, and obtains rosin acid modified poly ester；
(5) above-mentioned rosin acid modified poly ester is joined in the deionized water of its weight 4-6 times, add the oxidation of above-mentioned water-dispersion type Zinc, ultrasonic 20-30 minute, to obtain final product.
The invention have the advantage that the present invention prepares fumaropimaric acid by Colophonium, it is to have to condense many alicyclic rings rigidity knot Structure and the rosin derivative of polyfunctionality, prepare fumaropimaric acid PEPA as raw material, be incorporated into aqueous polyurethane In high polymer main chain, can make polyurethane produce crosslinking, molecular chain movement be obstructed formed hydrophilic region diminish and be crosslinked region Close, reduce infiltration and the diffusion of hydrone so that paint film has relatively low water absorption rate.Simultaneously fumaropimaric acid condense many The introducing of alicyclic structure, adds hot strength and the hardness of paint film, synthesizes fumaropimaric acid modified aqueous polyurethane, Ke Yike Taking the shortcomings such as standard aqueous low, the heat-resisting poor water resistance of polyurethane hardness, the hardness obtained is high, glossiness is good, thermostability and water-fast The modified aqueous polyurethane material of the function admirables such as property；The present invention is also added into water-dispersion type zinc oxide, on the one hand improves poly- The degree of crystallinity of urethane film so that the interaction force between polyurethane molecular strengthens, heat resistance raises: on the other hand, dispersion Nano zine oxide in polyurethane coating film serves the effect of similar cross-linking agent so that the free volume of polyurethane reduces, point The bound degree of activity of subchain increases, and the average chain length between adjacent " crosslinking points " diminishes, so the weightlessness of polyurethane Temperature improves, and heat resistance improves；Nano zine oxide is at sunlight simultaneously, particularly under ultraviolet light irradiates, in water and air, Can decomposite the electronegative electronics moved freely voluntarily, leave the hole of positively charged simultaneously, hole can be with excited oxygen and hydrogen-oxygen Root, makes the water and air adsorbed thereon become oxygen and the hydroxyl of activity, and they have the strongest redox, make thin After birth damages and causes dying of antibacterial, thus improves the anti-microbial property of polyester coating.
Detailed description of the invention
A kind of waterborne polyester coating, it is made up of the raw material of following weight parts:
Colophonium 35, fumaric acid 8,20% sodium hydroxide solution 6, ethylene glycol 20, antimony oxide 0.1, sodium polyacrylate 2, zinc chloride 13, polyether Glycols 80, toluene di-isocyanate(TDI) 100,2,2 dihydromethyl propionic acid 2, diethylene glycol 4, triethylamine 1,2 sulfydryl benzo Imidazoles 0.2.
The preparation method of a kind of described waterborne polyester coating, comprises the following steps；
(1) by Colophonium, fumaric acid mixing, 200 DEG C of insulation reaction 2.7 hours, are cooled to 157 DEG C of dischargings, add under nitrogen protection Enter in the dehydrated alcohol of its weight 10 times, drip above-mentioned 20% sodium hydroxide solution, stir to room temperature, sucking filtration, be vacuum dried, Being then added in the dehydrated alcohol of its weight 6 times, dropping concentration is the hydrochloric acid solution of 5%, and regulation pH is 3, stirs, must change Property fumaropimaric acid；
(2) above-mentioned 2 mercaptobenzimidazoles are joined in modified fumaropimaric acid, at 46 DEG C ultrasonic 2 minutes, sucking filtration, will be heavy Forming sediment and be vacuum dried, mix with ethylene glycol, antimony oxide, be passed through nitrogen, stirring reaction 3 hours at 150 DEG C, rising high-temperature is 210 DEG C, continue insulation 1.7 hours, cooling discharge, obtain modified poly ester polyhydric alcohol；
(3) being joined by above-mentioned sodium polyacrylate in the deionized water of its weight 80 times, drip acetic acid, regulation pH is 2, adds chlorine Change zinc, stir, the sodium hydroxide of dropping 3mol/l, regulation pH is 10, insulation reaction 3 hours at 87 DEG C, centrifugation, Precipitation is washed 2 times, is vacuum dried 10 hours at 60 DEG C, obtains water-dispersion type zinc oxide；
(4) by above-mentioned polyether Glycols, the mixing of modified poly ester polyhydric alcohol, at 118 DEG C, vacuum dehydration 2 hours, are cooled to room temperature, Mix with toluene di-isocyanate(TDI), insulation reaction 100 minutes at 76 DEG C, add 2,2 dihydromethyl propionic acids, continue insulation reaction 50 minutes, adding above-mentioned diethylene glycol, at 57 DEG C, insulation reaction 4 hours, are cooled to room temperature, add above-mentioned triethylamine, and stirring is all Even, obtain rosin acid modified poly ester；
(5) above-mentioned rosin acid modified poly ester is joined in the deionized water of its weight 4 times, add the oxidation of above-mentioned water-dispersion type Zinc, ultrasonic 20 minutes, to obtain final product.
Performance test with the coating gained paint film of the present invention:
Impact strength: 116kg cm;
Adhesive force: 1；
Hot strength: 26.8MPa；
Elongation at break: 560.2%；
Water absorption rate: 12.7%；
Viscosity: 43.5 mPa s.

Claims (2)

1. a waterborne polyester coating, it is characterised in that it is made up of the raw material of following weight parts:
Colophonium 35-40, fumaric acid 8-10,20-30% sodium hydroxide solution 6-7, ethylene glycol 20-34, antimony oxide 0.1-0.2, Sodium polyacrylate 2-3, zinc chloride 13-20, polyether Glycols 80-90, toluene di-isocyanate(TDI) 100-130,2,2-dihydroxymethyl Propanoic acid 2-3, diethylene glycol 4-5, triethylamine 1-2,2-mercaptobenzimidazole 0.2-0.4.
2. the preparation method of a waterborne polyester coating as claimed in claim 1, it is characterised in that comprise the following steps；
(1) by Colophonium, fumaric acid mixing, 200-230 DEG C of insulation reaction 2.7-3 hour under nitrogen protection, it is cooled to 157-160 DEG C discharging, joins in the dehydrated alcohol of its weight 10-15 times, drips above-mentioned 20-30% sodium hydroxide solution, stirring to room temperature, Sucking filtration, vacuum drying, it is then added in the dehydrated alcohol of its weight 6-8 times, dropping concentration is the hydrochloric acid solution of 5-7%, regulates pH For 3-4, stir, obtain modified fumaropimaric acid；
(2) above-mentioned 2-mercaptobenzimidazole is joined in modified fumaropimaric acid, at 46-50 DEG C ultrasonic 2-3 minute, take out Filter, is vacuum dried precipitation, mixes with ethylene glycol, antimony oxide, be passed through nitrogen, and at 150-160 DEG C, stirring reaction 3-4 is little Time, rise high-temperature and be 210-220 DEG C, continue insulation 1.7-2 hour, cooling discharge, obtain modified poly ester polyhydric alcohol；
(3) being joined by above-mentioned sodium polyacrylate in the deionized water of its weight 80-100 times, drip acetic acid, regulation pH is 2-3, Adding zinc chloride, stir, the sodium hydroxide of dropping 3-5mol/l, regulation pH is 10-11, insulation reaction at 87-90 DEG C 3-5 hour, centrifugation, precipitation is washed 2-3 time, is vacuum dried 10-11 hour at 60-65 DEG C, obtains water-dispersion type zinc oxide；
(4) by above-mentioned polyether Glycols, the mixing of modified poly ester polyhydric alcohol, vacuum dehydration 2-3 hour at 118-130 DEG C, cooling To room temperature, mix with toluene di-isocyanate(TDI), insulation reaction 100-120 minute at 76-80 DEG C, add 2,2-dihydroxymethyl third Acid, continues insulation reaction 50-60 minute, adds above-mentioned diethylene glycol, and insulation reaction 4-5 hour at 57-60 DEG C is cooled to room Temperature, adds above-mentioned triethylamine, stirs, and obtains rosin acid modified poly ester；
(5) above-mentioned rosin acid modified poly ester is joined in the deionized water of its weight 4-6 times, add the oxidation of above-mentioned water-dispersion type Zinc, ultrasonic 20-30 minute, to obtain final product.
CN201610550738.4A 2016-07-13 2016-07-13 A kind of waterborne polyester coating and preparation method thereof Pending CN106085194A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114015272A (en) * 2021-11-22 2022-02-08 湖南志洲新型干混建材有限公司 High-strength waterproof anti-cracking putty powder and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114015272A (en) * 2021-11-22 2022-02-08 湖南志洲新型干混建材有限公司 High-strength waterproof anti-cracking putty powder and preparation method thereof

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