WO2022088837A1 - Revêtement d'électrodéposition cationique ignifuge sans halogène - Google Patents

Revêtement d'électrodéposition cationique ignifuge sans halogène Download PDF

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Publication number
WO2022088837A1
WO2022088837A1 PCT/CN2021/111772 CN2021111772W WO2022088837A1 WO 2022088837 A1 WO2022088837 A1 WO 2022088837A1 CN 2021111772 W CN2021111772 W CN 2021111772W WO 2022088837 A1 WO2022088837 A1 WO 2022088837A1
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WO
WIPO (PCT)
Prior art keywords
parts
bisphenol
halogen
electrodeposition coating
cationic electrodeposition
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PCT/CN2021/111772
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English (en)
Chinese (zh)
Inventor
郭辉
刘薇薇
赵颖
陈豪杰
尤钊
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浩力森化学科技（江苏）有限公司
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Publication of WO2022088837A1 publication Critical patent/WO2022088837A1/fr

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    • 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
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/14—Polycondensates modified by chemical after-treatment
    • C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
    • C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/14—Polycondensates modified by chemical after-treatment
    • C08G59/1494—Polycondensates modified by chemical after-treatment followed by a further chemical treatment thereof
    • 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
    • C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
    • C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
    • C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
    • C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
    • C08G59/4014—Nitrogen containing compounds
    • C08G59/4028—Isocyanates; Thioisocyanates
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
    • C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
    • C09D5/443—Polyepoxides
    • C09D5/4434—Polyepoxides characterised by the nature of the epoxy binder
    • C09D5/4442—Binder characterised by functional groups
    • 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
    • C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
    • C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
    • C09D5/443—Polyepoxides
    • C09D5/4453—Polyepoxides characterised by the nature of the curing agent
    • 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
    • C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
    • C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
    • C09D5/443—Polyepoxides
    • C09D5/4457—Polyepoxides containing special additives, e.g. pigments, polymeric particles
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/22—Halogen free composition

Definitions

  • the invention relates to the technical field of flame retardant coatings, in particular to a halogen-free flame retardant cationic electrodeposition coating.
  • cationic electrodeposition coatings can uniformly coat all parts of metal workpieces with complex shapes and structures, and the formed coating film has good physical and chemical properties, so it is widely used in automobiles, tricycles, machinery. , hardware and other industries are widely used.
  • the purpose of the present invention is to solve the deficiencies of the prior art, and to provide a cationic electrodeposition coating with good electrodeposition coating adaptability and excellent corrosion resistance on various metal substrates
  • a halogen-free flame retardant cationic electrodeposition coating which includes amino-modified epoxy resin and blocked isocyanate curing agent, and is also mixed with 15% to 35% of bisphenol A polyoxyethylene ether phosphate.
  • the bisphenol A polyoxyethylene ether phosphate comprises 306.1 parts of phosphorus oxychloride, 900 parts of acetonitrile, 136.5 parts of pentaerythritol, 930 parts of bisphenol A polyoxyethylene ether and 1.8 parts of catalyst.
  • the amino-modified epoxy resin includes 2180 parts of a basic epoxy resin with an epoxy equivalent of 180-190, 860 parts of bisphenol A, 165.2 parts of cardanol, and 100 parts of methyl isobutyl ketone , 3 parts of dimethylbenzylamine, 400 parts of methyl isobutyl ketone, 189.4 parts of N-methylethanolamine, 231.2 parts of ketimine, and 250 parts of ethylene glycol monobutyl ether.
  • the blocked isocyanate curing agent includes a polyisocyanate and an active hydrogen-containing compound in a molar ratio of 1:1 to 1:1.2.
  • Another aspect of the present invention also includes a method for preparing a halogen-free flame-retardant cationic electrodeposition coating, the method comprising the following steps:
  • step S1 the following steps are also included:
  • amino-modified epoxy resin the basic epoxy resin, bisphenol A, cardanol, and methyl isobutyl ketone are stirred and mixed, then heated to 100 °C, added with dimethylbenzylamine catalyst, and then heated to 180 °C -190°C for 20 minutes, then the temperature was lowered to 140-150°C for 2 hours, and when the temperature was lowered to 100°C, methyl isobutyl ketone was added and mixed, and the temperature was kept between 90-95°C, and N-methylethanolamine was added. and ketimine, heat up to 110-120°C for 3 hours, add ethylene glycol butyl ether, cool down to 90°C, and disperse for 20min to obtain the amino-modified epoxy resin;
  • the advantages of the halogen-free flame-retardant cationic electrodeposition coating provided by the invention are: bisphenol A polyoxyethylene ether phosphate has good compatibility with epoxy resin, is not easy to separate out, is not easy to be hydrolyzed, and can be used for epoxy resin.
  • the resin is toughened to provide good flexibility of the paint film, and at the same time, it does not affect the chemical corrosion resistance of the paint film, which solves the problem of poor compatibility between ordinary phosphate ester flame retardants and epoxy resins, easy precipitation, and unsatisfactory stability of electrophoretic coatings. Construction application environment and other issues.
  • Phosphorus contained in bisphenol A polyoxyethylene ether phosphate and nitrogen contained in amino-modified epoxy resin and blocked isocyanate curing agent cooperate with each other, resulting in a significant synergistic effect, forming a phosphorus-nitrogen flame retardant system, making electrophoresis possible.
  • the paint film has good flame retardant properties.
  • FIG. 1 is a schematic diagram of the molecular structure of the bisphenol A polyoxyethylene ether phosphate.
  • a cationic electrodeposition coating composition can achieve good electrodeposition coating adaptability and excellent corrosion resistance on various metal substrates.
  • Phenol A polyoxyethylene ether phosphate mixed with epoxy resin and curing agent.
  • the epoxy resin is an amino-modified epoxy resin.
  • the basic epoxy resin epoxy equivalent: 180-190
  • a chain extender under the action of a catalyst, a ring-opening chain extension reaction is carried out at a temperature of 130°C-190°C.
  • the temperature is lowered to 90-100° C.
  • organic amine compound is added, and the amination and chain extension reactions are carried out at 110-120° C. to obtain the aminated amino-modified epoxy resin.
  • Epoxy resins are usually aliphatic, alicyclic and aromatic compounds containing 1, 2 to epoxy groups per molecular structure, and the epoxy equivalent of the epoxy resin is between 100-1500g/mol , particularly suitable epoxy resins include, but are not limited to, bisphenol A type epoxy resin, bisphenol S type epoxy resin, bisphenol F type epoxy resin, polyethylene glycol diglycidyl ether and polypropylene glycol diglycidyl Any one or a mixture of any two or more ethers.
  • the chain extender is polycarboxylic acid, polyether polyol, polyester polyol, polyhydric mercaptool, polyhydric phenol and amine with two or more active hydrogens, and the molecular weight of the chain extender is between 50 and 4000.
  • particularly suitable chain extenders include, but are not limited to, dicarboxylic acids, polyether polyols, polyester polyols, bisphenol A type polyether polyols, dihydric mercapto alcohols, monophenols, bisphenol compounds Any one or a mixture of any two or more.
  • Organic amine compounds are usually: butylamine, octylamine, diethylamine, methylbutylamine, monoethanolamine, diethanolamine, N-methylethanolamine, 1,3-dimethylpropylamine, N,N-dimethylamine Ethanolamine salts, etc.; also include ketimine organic amines. Among them, preferred are: diethanolamine, N-methylethanolamine, methyl isobutyl ketimine, ketimine-modified polyamide, and the like.
  • the curing agent is a blocked isocyanate curing agent, which is usually prepared by the reaction of polyisocyanates and compounds containing active hydrogen. Among them, the compound containing active hydrogen is slowly added dropwise to the polyisocyanate compound for reaction in about 1 to 3 hours. After the dropwise addition is completed, the reaction is kept at 70-110 °C for 1 to 5 hours.
  • the molar ratio of isocyanate and compound containing active hydrogen in the polyisocyanate curing agent is: 1:1 to 1:1.2.
  • the polyisocyanates used in the preparation process include but are not limited to any one of aliphatic diisocyanates, alicyclic diisocyanates, aromatic diisocyanates, triisocyanates, and tetraisocyanates or a mixture of any two or more, including toluene diisocyanate , diphenylmethane diisocyanate, polymethylene polyphenylene diisocyanate, hexamethylene diisocyanate, xylylene diisocyanate, isophorone diisocyanate, trimethylhexamethylene diisocyanate, etc.; Active hydrogen-containing compounds are any one or a mixture of any two or more of alcohols, alcohol ethers, phenols, amines, carboxylic acids, amides, and oximes containing 1-20 carbon atoms, including methanol, ethanol, and isopropanol.
  • the ketimine is prepared by the reaction of diethylenetriamine and methyl isobutyl ketone, the solid content of the final product is 70%, and the amine value is 450-480 mgKOH/g.
  • Emulsion A Emulsion A
  • pigment dispersion resin with a solid content of 62%, 1450 g of titanium oxide, 700 g of kaolin, 30 g of carbon black, 100 g of dioctyl tin oxide, 100 g of bismuth hydroxide and 200 g of deionized water.
  • the color paste with a content of 56%.
  • the paint films were baked at 165°C for 20min, and the number of pores of the dried test piece was calculated.
  • the paint films were all baked at 165°C for 20 minutes, and the film thickness was controlled at 20-24 microns. According to the national standard NSS test, the 1000h salt spray test was used to evaluate the blistering of the cut part. number and expansion width.
  • the paint films were baked at 165°C for 20 minutes, and the film thickness was controlled at 20-24 microns. With or without an open flame.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Molecular Biology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Emergency Medicine (AREA)
  • Paints Or Removers (AREA)

Abstract

L'invention concerne un revêtement d'électrodéposition cationique ignifuge sans halogène, qui comprend une résine époxy modifiée par un groupe amino et un agent de durcissement à base d'isocyanate bloqué et est en outre mélangé avec 15 % à 35 % de bisphénol A polyoxyéthylène éther phosphate. L'invention concerne également un procédé de préparation du revêtement d'électrodéposition cationique ignifuge sans halogène.
PCT/CN2021/111772 2020-10-29 2021-08-10 Revêtement d'électrodéposition cationique ignifuge sans halogène WO2022088837A1 (fr)

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CN202011176420.7A CN112210273A (zh) 2020-10-29 2020-10-29 一种无卤阻燃阳离子电沉积涂料
CN202011176420.7 2020-10-29

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Cited By (2)

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CN114806477A (zh) * 2022-05-18 2022-07-29 青岛德聚胶接技术有限公司 一种柔性环氧灌封胶及其制备方法和应用
CN117070126A (zh) * 2023-09-28 2023-11-17 北京景泰消防科技有限公司 一种耐腐蚀水性防火涂料及其制备方法

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CN112210273A (zh) * 2020-10-29 2021-01-12 浩力森化学科技（江苏）有限公司 一种无卤阻燃阳离子电沉积涂料

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CN112210273A (zh) * 2020-10-29 2021-01-12 浩力森化学科技（江苏）有限公司 一种无卤阻燃阳离子电沉积涂料

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CN101899252A (zh) * 2009-05-26 2010-12-01 关西涂料株式会社 阳离子电沉积涂料组合物
CN103102483A (zh) * 2013-01-31 2013-05-15 合肥工业大学 一种含三嗪结构的大分子量膨胀型阻燃剂及合成方法
CN107573799A (zh) * 2017-09-22 2018-01-12 陈晨特 一种磷氮协同自阻燃型环保木器涂料
CN112210273A (zh) * 2020-10-29 2021-01-12 浩力森化学科技（江苏）有限公司 一种无卤阻燃阳离子电沉积涂料

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114806477A (zh) * 2022-05-18 2022-07-29 青岛德聚胶接技术有限公司 一种柔性环氧灌封胶及其制备方法和应用
CN114806477B (zh) * 2022-05-18 2023-03-03 青岛德聚胶接技术有限公司 一种柔性环氧灌封胶及其制备方法和应用
CN117070126A (zh) * 2023-09-28 2023-11-17 北京景泰消防科技有限公司 一种耐腐蚀水性防火涂料及其制备方法
CN117070126B (zh) * 2023-09-28 2024-03-05 北京景泰消防科技有限公司 一种耐腐蚀水性防火涂料及其制备方法

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