WO2023078469A1 - 防轮胎变色保护液及其制备方法 - Google Patents

防轮胎变色保护液及其制备方法 Download PDF

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WO2023078469A1
WO2023078469A1 PCT/CN2022/136714 CN2022136714W WO2023078469A1 WO 2023078469 A1 WO2023078469 A1 WO 2023078469A1 CN 2022136714 W CN2022136714 W CN 2022136714W WO 2023078469 A1 WO2023078469 A1 WO 2023078469A1
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Prior art keywords
water
parts
discoloration
tire
protective liquid
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PCT/CN2022/136714
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English (en)
French (fr)
Inventor
朱光苗
李延珍
贺炅皓
李月
侯方伟
李岩磊
Original Assignee
青岛大学
青岛创智恒业新材料有限公司
大冢材料科技(上海)有限公司
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Priority to US18/266,609 priority Critical patent/US11912893B2/en
Publication of WO2023078469A1 publication Critical patent/WO2023078469A1/zh

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02Emulsion paints including aerosols
    • C09D5/024Emulsion paints including aerosols characterised by the additives
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D4/00Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/48Stabilisers against degradation by oxygen, light or heat
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/63Additives non-macromolecular organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/65Additives macromolecular
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/80Processes for incorporating ingredients

Definitions

  • the invention relates to the technical field of tire additives, in particular to an anti-discoloration protective liquid for tires and a preparation method thereof.
  • the color of the tires will affect the normal sales of the tires.
  • the usual method is to use tire cover fluid for modification, but the tire cover fluid or protective fluid sold on the market is a simple protective wax/carbon black pigment system or a non-cross-linked curing system, which is easy to erase and can only temporarily cover tire discoloration Parts are easily rubbed off during handling and transportation, and cannot protect the tires from discoloration very well.
  • a protective solution for white sidewalls is mentioned, but there is no curing cross-linking system, and it can be cleaned with clear water in the later stage. Therefore, it is of great significance to provide a dense coating capable of forming a layer of cured cross-linking on the tire sidewall surface, which has good permanent or semi-permanent protection for the tire and improves the quality and service life of the tire.
  • the anti-discoloration protective liquid for tires is prepared by using the following components and raw materials in parts by weight:
  • the total amount of the above components is 85-150 parts by weight.
  • the film-forming aid is one or more of propylene glycol butyl ether, propylene glycol methyl ether acetate or alcohol ester twelve.
  • the water-based epoxy resin is a polymer water-based epoxy resin dispersion or system containing some hydroxyl groups, preferably a one-component epoxy resin emulsion EPICLON H-502-42W.
  • the toughened water-based resin is an aqueous emulsion containing C/C double bonds, preferably one or more of natural rubber latex, aqueous isoprene rubber emulsion, aqueous styrene-butadiene latex, aqueous acrylic latex, and aqueous polyurethane latex, Among them, water-based polyurethane latex or water-based styrene-butadiene latex SD-7946 is preferred.
  • the modifying agent is an acylhydrazone compound or an oligomer, preferably a diacylhydrazone.
  • the active agent is a transition metal oxide, preferably ZnO.
  • the reactive ultraviolet absorber is a compound carrying an ultraviolet absorbing group, preferably 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methanol base acrylate.
  • the curing aid is a dispersible isocyanate, preferably a water-dispersible polyisocyanate resin BURNOCK DNW-5500.
  • the preparation method of anti-tire discoloration protective liquid is characterized in that, comprising the following steps:
  • the stirring time in the step S2 is 30-60 min.
  • the present invention has the following beneficial effects:
  • the present invention adopts high-molecular-weight water-based epoxy resin/toughening resin system/curing auxiliary agent, which can be quickly dried and formed into a film at room temperature, and the tough film has a certain amount of deformation, which can prevent the coating from falling off when the tire is dynamically deformed, and can be cured at the same time.
  • the addition of additives reacts with the hydroxyl groups on the epoxy resin to further improve the adhesion of the coating on the tire.
  • changing the amount of curing additives can effectively shorten the surface drying time of the coating; the introduction of modifiers mainly It is through complexing with transition metal oxides, such as zinc oxide, to form coordination bonds, which are interspersed between resin molecular chains.
  • the coordination bonds strengthen the intermolecular interaction force and improve the damage resistance and weather resistance of the resin molecular chain itself.
  • the reactive anti-ultraviolet absorber undergoes an addition reaction with the C/C double bond of the toughened water-based resin, and the UV-absorbing group is introduced into the toughened water-based resin to improve the UV resistance of the final protective solution;
  • the tire sprayed by the invention can form a layer of dense coating on the sidewall surface of the tire.
  • a coating film can be cured at room temperature, with good adhesion and strong weather resistance. It is suitable for black tires, Colored tires have good permanent or semi-permanent protection. After spraying, the surface of the tire will not feel greasy. It will not corrode the tire, maintain a smooth appearance, and improve the performance and service life of the tire.
  • Fig. 1 is a comparative schematic diagram of partially coating the protective solution of the present invention on the tire surface for 3 weeks.
  • Fig. 2 is a comparison schematic diagram of the protection liquid of the present invention partially coated on the tire surface for 6 months.
  • An anti-discoloration protective liquid for tires provided by the present invention is prepared by using the following components and raw materials in parts by weight: 0.5-2 parts of film-forming aid, 0.1-0.5 parts of defoamer, 2-3 parts of dispersant, water-based ring 15-25 parts of oxygen resin, 20-35 parts of toughened water-based resin, 0.5-2.5 parts of modifier, 1-3.5 parts of active agent, 1-2 parts of reactive ultraviolet absorber, 0-6 parts of pigment and filler, 0.05-0.2 part of bacterial agent, 0.4-1.6 part of curing aid, 0.05-0.5 part of stabilizer, 0.1-0.8 part of thickener, and the balance of deionized water.
  • the total amount of the above components is 85-150 parts by weight.
  • the film-forming aid is at least one of propylene glycol butyl ether, propylene glycol methyl ether acetate or alcohol ester twelve.
  • Described defoamer is at least one in Foamex 1488, FoamStar ST2410AC, AGITAN760 defoamer.
  • the dispersant is at least one of fatty acids, fatty alcohols, fatty amides or esters.
  • Described water-based epoxy resin is the macromolecule type water-based epoxy resin dispersion or the system containing partial hydroxyl, preferred single-component epoxy resin emulsion EPICLON H-502-42W.
  • the toughened water-based resin is one or more of natural latex, water-based isoprene rubber emulsion, water-based styrene-butadiene latex, water-based acrylic latex, water-based polyurethane latex and other water-based emulsions with better toughening effects containing C/C double bonds. species, preferably water-based polyurethane latex or water-based styrene-butadiene latex SD-7946.
  • the active agent is a transition metal oxide, preferably ZnO.
  • the modifying agent is an acylhydrazone compound or an oligomer, preferably a diacylhydrazone.
  • the introduction of modifiers is mainly through complexation with transition metal oxides, such as zinc oxide, to form coordination bonds, which are interspersed between resin molecular chains.
  • the coordination bonds enhance the intermolecular interaction and improve the resin molecular chain itself. Anti-destructive and weather resistance.
  • the reactive ultraviolet absorber is a compound carrying an ultraviolet absorbing group, preferably 2-[3-(2H-benzotriazol-2-yl)-4-hydroxyphenyl]ethyl 2-methacrylate ,
  • the reactive anti-ultraviolet absorber reacts with the C/C double bond of the toughened water-based resin, and introduces the UV-absorbing group into the toughened water-based resin to improve the UV resistance of the final protective solution.
  • the pigment and filler is at least one of nano zinc oxide, titanium dioxide, lithopone, pigment carbon black or white carbon black.
  • the curing aid is dispersible isocyanate, preferably water dispersible polyisocyanate resin BURNOCK DNW-5500.
  • the isocyanate group of the curing aid interacts with a small amount of hydroxyl contained in the epoxy H-502-42W to accelerate the epoxy film formation, accelerate the curing and shorten the surface drying time.
  • the fungicide is at least one of copper oxide, ammonium dihydrogen phosphate, anilides, imidazoles, thiazoles, isothiazolone derivatives, quaternary ammonium salts, bisquats or phenols.
  • the stabilizer is at least one of organic amine, ammonia water or sodium hydroxide.
  • the thickener is carboxymethyl cellulose, propylene glycol alginate, methyl cellulose, sodium starch phosphate, sodium carboxymethyl cellulose, sodium alginate, casein, sodium polyacrylate, polyoxyethylene or At least one of nonionic polyurethane polymers such as polyvinylpyrrolidone.
  • the preparation method of a kind of anti-tire discoloration protective liquid provided by the present invention comprises the following steps:
  • this feeding sequence is to give priority to the addition of film-forming aids, defoamers, dispersants, etc., which is conducive to providing a stable dispersion environment for film-forming substances, and can uniformly and stably disperse film-forming substances, which is conducive to the uniformity of film-forming It can also effectively improve the stability of the coating.
  • the stirring speed is 450-650rpm, and the effect of obtaining the protective solution is best when the stirring time is 30-60min, while the slow speed is low in efficiency and the dispersion is not good. If the speed is too fast and the stirring time is too long, the stability of the system will be affected. And obtain the film-forming quality of the protection solution.
  • Embodiment 1 ⁇ embodiment 5 are identical to Embodiment 1 ⁇ embodiment 5:
  • Step S1 First, add 40 to 60 parts by weight of deionized water to the reactor according to Table 1, and add film-forming aids, defoamers, dispersants, and water-based resins in sequence according to the parts by weight of each component in the above table , modifiers, active agents, reactive UV absorbers, pigments and fillers (can be unfilled, better hiding power), sterilizers;
  • Step S2 Next, stir at a rotational speed of 450-650 rpm, add curing aids, stabilizers, and thickeners diluted with the remaining 5 parts of deionized water under stirring conditions, stir for 30-60 minutes, and filter to obtain protective fluid.
  • the test result and the corresponding test standard are shown in Table 2, and the obtained protection liquid is coated on the part surface of the tire, after standing for a period of time, the discoloration of the tire surface Observe the condition, as shown in Figures 1 to 2, the part of the tire coated with protective fluid (the left part in Figures 1 to 2) has no obvious discoloration after being placed for 3 weeks or 6 months, while the part that is not coated The part of the tire covered with protective fluid (the right part in Figures 1 and 2) has obvious aging and discoloration after being placed for 3 weeks or 6 months, which affects the quality of the tire. Therefore, it is concluded that the protective fluid has a very obvious anti- Color changing effect.
  • the 5 examples can all meet the requirements of tire protection liquid, and the surface drying time at room temperature after spraying is all ⁇ 0.5h, which is mainly due to the combination of high molecular weight water-based resin and curing aid (the coating contains a small amount of hydroxyl and Water-based isocyanate curing assistance) can be realized, and at the same time, the adhesion of the coating on the tire is enhanced; the elongation at break meets the requirement that the coating does not fall off when the sidewall is deformed, mainly because the compounding of the toughened water-based resin is realized; the improvement
  • anti-aging agents essentially improves the aging resistance and damage resistance of the resin; the addition of reactive UV absorbers introduces UV-absorbing groups into the water-based resin chains, so that the coating’s UV-aging resistance can be substantially improved. promote.
  • the stability of the paint meets the requirements of ⁇ 6 months, which is in line with the industry standard of paint.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Tires In General (AREA)

Abstract

本发明涉及轮胎助剂技术领域,具体涉及一种可常温固化的具有超强耐候性的防轮胎变色保护液及其制备方法。所述保护液采用组分(重量份):水性环氧树脂15~25份、增韧水性树脂20~35份、改性剂0.5~2.5份、可反应型紫外线吸收剂1~2份、活性剂1~3.5份、成膜助剂等其他助剂2.6~5.5份、颜填料0~6份、除菌剂0.05~0.2份、去离子水40~60份,在搅拌的条件下,再加入固化助剂0.4~1.6份、稳定剂0.05~0.5份、增稠剂0.1~0.8份,搅拌至一定时间,过滤后得保护液。本发明所述高分子量水性环氧树脂/增韧水性树脂复配给涂层提供一定的强度和韧性,且可常温自固化,为常温施工提供方便;本发明为单组份水性涂料,施工工艺简单,使用方便,耐刮蹭、可防止涂层脱落,可显著避免轮胎在储存和运输过程中的变色现象。

Description

防轮胎变色保护液及其制备方法 技术领域
本发明涉及轮胎助剂技术领域,具体涉及一种防轮胎变色保护液及其制备方法。
背景技术
目前,成品轮胎生产完毕后,在储存和运输的过程中,由于轮胎储存环境、储存时间、轮胎配方本身的影响等,导致轮胎变色影响轮胎的正常销售。通常的办法是使用轮胎掩饰液进行修饰,但市面上在售的轮胎掩饰液或保护液为简单的防护蜡/炭黑颜料体系或无交联固化体系,易擦除,只能临时掩盖轮胎变色部分,在搬运、运输过程中极易被蹭掉,不能对轮胎防变色起到很好的保护作用。如在CN111205708A中提及了一种白胎侧的保护液,但无固化交联体系,后期也可清水洗净。因此,提供一种可在轮胎胎侧表面形成一层具有固化交联作用的致密涂层,对轮胎具有很好的永久性或半永久性保护,对提高轮胎品质和使用寿命,具有重要意义。
发明内容
针对现有技术的上述不足,发明人在长期实践中研究设计出一种防轮胎变色保护液及其制备方法,绿色环保、使用方便。
本发明是采用以下的技术方案实现的:
防轮胎变色保护液,采用以下组分及重量份的原料制备得到:
Figure PCTCN2022136714-appb-000001
Figure PCTCN2022136714-appb-000002
以上各组分总量为85~150重量份。
进一步地,所述成膜助剂为丙二醇丁醚、丙二醇甲醚醋酸酯或醇酯十二中的一种或多种。
进一步地,所述水性环氧树脂为含部分羟基的高分子型水性环氧树脂分散体或体系,优选单组份环氧树脂乳液EPICLON H-502-42W。
进一步地,所述增韧水性树脂为含C/C双键的水性乳液,优选天然胶乳、水性异戊橡胶乳液、水性丁苯胶乳、水性丙烯酸胶乳、水性聚氨酯胶乳中的一种或多种,其中优选水性聚氨酯胶乳或水性丁苯胶乳SD-7946。
进一步地,所述改性剂为酰腙类化合物或低聚物,优选双酰腙类。
进一步地,所述活性剂为过渡金属氧化物,优选ZnO。
进一步地,所述可反应型紫外线吸收剂为携带吸收紫外线基团的化合物,优选2-[3-(2H-苯并三唑-2-基)-4-羟基苯基]乙基2-甲基丙烯酸酯。
进一步地,所述固化助剂为可分散型异氰酸酯,优选水可分散的聚异氰酸酯树脂BURNOCK DNW-5500。
防轮胎变色保护液的制备方法,其特征在于,包括以下步骤:
S1、向反应容器中加入去离子水后,依次加入成膜助剂、消泡剂、分散剂、水性树脂、改性剂、活性剂、可反应型紫外线吸收剂、颜填料、除菌剂,在450~650rpm的转速下对上述乳液进行搅拌;
S2、待S1体系搅拌均匀,在转速不变的条件下,用一定量的去离子水对可分散型固化助剂进行稀释后并成滴加进S1体系乳液,然后依次加入稳定剂和增稠剂,搅拌至一定时间,过滤得保护液。
进一步地,所述步骤S2中搅拌时间为30~60min。
本发明与现有技术相比,具有以下有益效果:
本发明采用高分子量水性环氧树脂/增韧树脂体系/固化助剂,可在常温条件下速干成膜且韧性膜具有一定的形变量,可防止轮胎动态变形时涂层的脱落,同时固化助剂的加入与环氧树脂上的羟基反应,进一步提高涂层在轮胎上的附着性,同时实验发现改变固化助剂的量可有效缩短涂层的表干时间;改性剂的引入,主要是通过与过渡金属氧化物,如氧化锌络合形成配位键,穿插于树脂分子链之间,配位键增强了分子间相互作用力,提高了树脂分子链本身的抗破坏力与耐候性。同时,可反应型抗紫外线吸收剂与增韧水性树脂的C/C双键发生加成反应,把吸收紫外线的基团引入到增韧水性树脂上,提高最终得到保护液的耐紫外线能力;本发明喷涂后的轮胎可在轮胎胎侧表面形成一层致密涂层,通过采用本发明所述体系的配合,可得到常温固化、附着性较好、耐侯性极强的涂膜,对黑色轮胎、彩色轮胎均有很好的永久性或半永久性保护,喷涂后轮胎表面不会有油腻感,对于轮胎没有腐蚀,保持了爽滑的外观效果,提高轮胎的性能和使用寿命。
附图说明
图1是本发明的保护液部分涂覆在轮胎表面3个周的对照示意图。
图2是本发明的保护液部分涂覆在轮胎表面6个月的对照示意图。
具体实施方式
为了使本发明目的、技术方案更加清楚明白,下面结合实施例,对本发明作进一步详细说明。
本发明提供的一种防轮胎变色保护液,采用以下组分及重量份的原料制备得到:成膜助剂0.5~2份、消泡剂0.1~0.5份、分散剂2~3份、水性环氧树脂15~25份、增韧水性树脂20~35份、改性剂0.5~2.5份、活性剂1~3.5份、可反应型紫外线吸收剂1~2份、颜填料0~6份、除菌剂0.05~0.2份、固化助剂0.4~1.6份、稳定剂0.05-0.5份、增稠剂0.1-0.8份、去离子水余量,以上各组分总量为85~150重量份。
以上各组分优选地,所述成膜助剂为丙二醇丁醚、丙二醇甲醚醋酸酯或醇酯十二中的至少一种。
所述消泡剂为Foamex 1488、FoamStar ST2410AC、AGITAN760消泡剂中的至少一种。
所述分散剂为脂肪酸类、脂肪醇类、脂肪族酰胺类或酯类中的至少一种。
所述水性环氧树脂为含部分羟基的高分子型水性环氧树脂分散体或体系,优选单组份环 氧树脂乳液EPICLON H-502-42W。
所述增韧水性树脂为天然胶乳、水性异戊橡胶乳液、水性丁苯胶乳、水性丙烯酸胶乳、水性聚氨酯胶乳等增韧效果较好的含C/C双键的水性乳液中的一种或多种,优选水性聚氨酯胶乳或水性丁苯胶乳SD-7946。
所述活性剂为过渡金属氧化物,优选ZnO。
所述改性剂为酰腙类化合物或低聚物,优选双酰腙类。改性剂的引入,主要是通过与过渡金属氧化物,如氧化锌络合形成配位键,穿插于树脂分子链之间,配位键增强了分子间相互作用力,提高了树脂分子链本身的抗破坏力与耐候性。
所述可反应型紫外线吸收剂为携带吸收紫外线基团的化合物,优选2-[3-(2H-苯并三唑-2-基)-4-羟基苯基]乙基2-甲基丙烯酸酯,可反应型抗紫外线吸收剂与增韧水性树脂的C/C双键发生加成反应,把吸收紫外线的基团引入到增韧水性树脂上,提高最终得到保护液的耐紫外线能力。
所述颜填料为纳米氧化锌、钛白粉、立德粉、色素炭黑或白炭黑中的至少一种。
所述固化助剂为可分散型异氰酸酯类,优选水可分散的聚异氰酸酯树脂BURNOCK DNW-5500。固化助剂的异氰酸酯基团与环氧H-502-42W中含有的少量羟基作用,加速环氧成膜,使固化加快,表干时间变短。
所述除菌剂为氧化铜、磷酸二氢铵、酰基苯胺类、咪唑类、噻唑类、异噻唑酮衍生物、季铵盐类、双呱类或酚类中的至少一种。
所述稳定剂为有机胺、氨水或氢氧化钠中的至少一种。
所述增稠剂为羧甲基纤维素、丙二醇藻蛋白酸酯、甲基纤维素、淀粉磷酸钠、羧甲基纤维素钠、藻蛋白酸钠、酪蛋白、聚丙烯酸钠、聚氧乙烯或聚乙烯吡咯烷酮等非离子型聚氨酯类聚合物中的至少一种。
本发明提供的一种防轮胎变色保护液的制备方法,包括以下步骤:
S1、预先向反应容器中加入去离子水后,依次加入成膜助剂、消泡剂、分散剂、水性树脂、改性剂、活性剂、可反应型紫外线吸收剂、颜填料、除菌剂,在450~650rpm的转速下对上述乳液进行搅拌。
S2、待S1体系搅拌均匀,在转速不变的条件下,用一定量的去离子水对固化助剂进行稀释后并成滴加进S1体系乳液,然后依次加入稳定剂和增稠剂,搅拌30~60min,过滤即可 得到保护液。
此种加料顺序的目的是:优先加入成膜助剂、消泡剂、分散剂等有利于为成膜物质提供一个稳定的分散环境,能够均匀稳定的分散成膜物质,有利于成膜的均一性,也可有效提高涂料的稳定性。固化助剂用去离子水稀释后按滴入的方式加入,也是确保固化助剂的均匀分散。同时搅拌转速在450~650rpm,搅拌时间在30~60min时获得保护液的效果最好,而转速较慢效率低且分散性不好,转速过快、搅拌时间过长则会影响体系的稳定性和获得保护液的成膜品质。
为了进一步说明本发明,下面结合具体的实施例对本发明提供的防轮胎变色保护液及其制备方法进行详细地描述,但不能将它们理解为本发明保护范围的限制。
实施例1~实施例5:
实施例1~实施例5中所使用组分及重量份如表1所示,
表1.对应实施例中使用组分及质量份数
Figure PCTCN2022136714-appb-000003
Figure PCTCN2022136714-appb-000004
步骤S1:首先,按照表1向反应釜中加入40~60重量份数去离子水,按照上述表格中各组分重量份数,依次加入成膜助剂、消泡剂、分散剂、水性树脂、改性剂、活性剂、可反应型紫外线吸收剂、颜填料(可以不填充,遮盖力也较好)、除菌剂;
步骤S2:其次,在450-650rpm转速下搅拌,在搅拌条件下添加用剩余量5份去离子水稀释的固化助剂、稳定剂、增稠剂,搅拌30-60min的时间,进行过滤后得到保护液。
利用涂料测试标准,对所得到的保护液进行性能测试,测试结果及对应测试标准如表2所示,并将得到的保护液涂覆在轮胎的部分表面,放置一段时间后对于轮胎表面的变色情况进行观察,如图1~图2所示,涂覆有保护液的轮胎部分(图1~图2中左侧部分)经放置3个周或6个月均未出现明显变色,而未涂覆有保护液的轮胎部分(图1~图2中右侧部分)经放置3个周或6个月出现明显的老化变色现象,影响轮胎的质量,因此得出保护液具有非常明显突出的防变色效果。
表2.对应实施例的保护液测量数值
Figure PCTCN2022136714-appb-000005
Figure PCTCN2022136714-appb-000006
由以上数据可得出,5个实施例均可满足轮胎保护液需求,喷涂后常温表干时间均≤0.5h,主要是借助高分子性水性树脂同时搭配固化助剂(涂料中含少量羟基与水性异氰酸酯固化协助)得以实现,同时增强了涂层在轮胎上的附着性;断裂伸长率满足在胎侧发生变形时,涂层无脱落,主要是增韧水性树脂的复配得以实现;改性剂的加入从本质上提升了树脂的耐老化性、耐破坏性;可反应型紫外吸收剂的加入,在水性树脂链上引入了紫外线吸收基团,使涂层耐紫外老化得以本质上的提升。涂料的稳定性均满足≥6个月,符合涂料的行业标准。
在本发明的描述中,需要说明的是,术语“竖直”、“上”、“下”、“水平”等指示的方位或位置关系为基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作,因此不能理解为对本发明的限制。
在本发明的描述中,还需要说明的是,除非另有明确的规定和限定,术语“设置”、“安装”、“相连”、“连接”、“连通”应做广义理解,例如,可以是固定连接,也可以是可拆卸连接,或一体地连接;可以是机械连接,也可以是电连接;可以是直接相连,也可以通过中间媒介间接相连,可以是两个元件内部的连通。对于本领域的普通技术人员而言,可以根据具体情况理解上述术语在本发明中的具体含义。
以上仅为本发明的较佳实施例而己,并不以本发明为限制,凡在本发明的精神和原 则之内所作的均等修改、等同替换和改进等,均应包含在本发明的专利涵盖范围内。

Claims (9)

  1. 一种防轮胎变色保护液,其特征在于采用以下组分及重量份的原料制备得到:
    Figure PCTCN2022136714-appb-100001
    以上各组分总量为85~150重量份;
    所述水性环氧树脂为含部分羟基的高分子型水性环氧树脂分散体或体系;
    所述增韧水性树脂为天然胶乳、水性异戊橡胶乳液、水性丁苯胶乳、水性丙烯酸胶乳、水性聚氨酯胶乳中的一种或多种;
    所述改性剂为酰腙类化合物或低聚物;
    所述活性剂为ZnO;
    所述可反应型紫外线吸收剂为携带吸收紫外线基团的化合物;
    所述固化助剂为可分散型异氰酸酯。
  2. 根据权利要求1所述的防轮胎变色保护液,其特征在于,所述成膜助剂为丙二醇 丁醚、丙二醇甲醚醋酸酯或醇酯十二中的一种或多种。
  3. 根据权利要求1所述的防轮胎变色保护液,其特征在于,所述水性环氧树脂为单组份环氧树脂乳液EPICLON H-502-42W。
  4. 根据权利要求1所述的防轮胎变色保护液,其特征在于,所述增韧水性树脂为水性聚氨酯胶乳或水性丁苯胶乳SD-7946。
  5. 根据权利要求1所述的防轮胎变色保护液,其特征在于,所述改性剂为双酰腙类。
  6. 根据权利要求1所述的防轮胎变色保护液,其特征在于,所述可反应型紫外线吸收剂为2-[3-(2H-苯并三唑-2-基)-4-羟基苯基]乙基2-甲基丙烯酸酯。
  7. 根据权利要求1~6任意一项所述的防轮胎变色保护液,其特征在于,所述固化助剂为水可分散的聚异氰酸酯树脂BURNOCK DNW-5500。
  8. 一种如权利要求1所述的防轮胎变色保护液的制备方法,其特征在于,包括以下步骤:
    S1、向反应容器中加入去离子水后,依次加入成膜助剂、消泡剂、分散剂、水性环氧树脂、增韧水性树脂、改性剂、活性剂、可反应型紫外线吸收剂、颜填料、除菌剂,在450~650rpm的转速下对上述乳液进行搅拌;
    S2、待S1体系搅拌均匀,在转速不变的条件下,用一定量的去离子水对固化助剂进行稀释后并成滴加进S1体系乳液,然后依次加入稳定剂和增稠剂,搅拌至一定时间,过滤得保护液。
  9. 根据权利要求8所述的防轮胎变色保护液的制备方法,其特征在于,所述步骤S2中搅拌时间为30~60min。
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