CN113122102B - 一种低污染高平整度喷漆及其喷漆工艺 - Google Patents
一种低污染高平整度喷漆及其喷漆工艺 Download PDFInfo
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- CN113122102B CN113122102B CN202110584192.5A CN202110584192A CN113122102B CN 113122102 B CN113122102 B CN 113122102B CN 202110584192 A CN202110584192 A CN 202110584192A CN 113122102 B CN113122102 B CN 113122102B
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- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims abstract description 25
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- ADFWQBGTDJIESE-UHFFFAOYSA-N anacardic acid 15:0 Natural products CCCCCCCCCCCCCCCC1=CC=CC(O)=C1C(O)=O ADFWQBGTDJIESE-UHFFFAOYSA-N 0.000 description 1
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- YLOWTPHXXDJBAH-UHFFFAOYSA-N methyl 2-methylprop-2-enoate Chemical compound COC(=O)C(C)=C.COC(=O)C(C)=C YLOWTPHXXDJBAH-UHFFFAOYSA-N 0.000 description 1
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- VWBWQOUWDOULQN-UHFFFAOYSA-N nmp n-methylpyrrolidone Chemical compound CN1CCCC1=O.CN1CCCC1=O VWBWQOUWDOULQN-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- OZVLILWRDWSCNL-UHFFFAOYSA-N phthalic acid terephthalic acid Chemical compound C(C=1C(C(=O)O)=CC=CC1)(=O)O.C(C=1C(C(=O)O)=CC=CC1)(=O)O.C(C=1C(C(=O)O)=CC=CC1)(=O)O.C(C=1C(C(=O)O)=CC=CC1)(=O)O.C(C1=CC=C(C(=O)O)C=C1)(=O)O OZVLILWRDWSCNL-UHFFFAOYSA-N 0.000 description 1
- 150000003022 phthalic acids Chemical class 0.000 description 1
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- 241000894007 species Species 0.000 description 1
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- C—CHEMISTRY; METALLURGY
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- 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
- C09D151/00—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers
- C09D151/08—Coating compositions based on graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Coating compositions based on derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
- C08F283/008—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00 on to unsaturated polymers
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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- 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
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- 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
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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
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- C08G18/348—Hydroxycarboxylic acids
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- 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
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- C08G18/36—Hydroxylated esters of higher fatty acids
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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
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- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- 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
- C08G18/58—Epoxy resins
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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
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- C08G18/6541—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen the low-molecular compounds being compounds of group C08G18/34
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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
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- 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
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- Engineering & Computer Science (AREA)
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Abstract
本申请涉及高分子材料的领域,具体公开了一种低污染高平整度喷漆,包含以下的组分:异佛尔酮二异氰酸酯;聚醚多元醇;聚蓖麻油酸酯4;腰果壳油;扩链剂;环氧树脂;二羟甲基丙酸;N‑甲基吡咯烷酮;甲基丙烯酸甲酯;引发剂;丙酮;三乙胺;水;其他助剂。异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯、苯二甲酸和腰果壳油共混交联反应,降低喷漆玻璃化转变温度,使喷漆的最低成膜温度可低至5‑10℃,漆膜的硬度可达3H,使漆膜兼具较好的漆膜硬度、耐磨性以及较小的最低成膜温度。
Description
技术领域
本申请涉及高分子材料的领域,更具体地说,它涉及一种低污染高平整度喷漆及其喷漆工艺。
背景技术
实木是一种天然环保材料,其作为原材料的木质品深受广大用户的喜爱,具体木制品包括桌、椅、地板等,木制品在家具中占有较为重要的地位。
为了防止木质品的腐蚀以及提高木制品的防水、防油性,通常需要在木制品表面涂一层由木器漆形成的漆膜。
其中,水性木器漆是以水为溶剂的漆涂料,在实用过程中有害物质挥发性小甚至不挥发,因而其是目前较为安全、环保的木器漆涂料。但是由于水性木器漆受涂装效果和涂装工艺等综合因素的影响,水性木器漆在国内的市场占有率还很低。
水性木器漆因其最低成膜温度通常较高,其最低成膜温度通常为15-20℃,使水性木器漆在低温环境下使用时,木器漆难以成膜,导致较低温度下喷漆后,漆膜容易产生泛白、开裂、甚至形成粉状物质的问题,使漆膜的平整度差。
发明内容
为了提高低温环境中喷漆后漆膜的平整度,本申请提供一种低污染高平整度喷漆及其喷漆工艺。
第一方面,本申请提供一种低污染高平整度喷漆,采用如下的技术方案:
一种低污染高平整度喷漆,包含以下重量份的组分:
异佛尔酮二异氰酸酯20-30份;
聚醚多元醇20-30份;
聚蓖麻油酸酯4-6份;
腰果壳油2-3份;
扩链剂2-3份;
环氧树脂5-8份;
二羟甲基丙酸3-5份;
N-甲基吡咯烷酮2-4份;
甲基丙烯酸甲酯10-15份;
引发剂3-4份;
丙酮40-50份;
三乙胺2-3份;
水70-90份;
其他助剂4-6份。
通过采用上述技术方案,异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯和腰果壳油共混交联反应得到预聚体,再通过扩链剂。N-甲基吡咯烷酮为二羟甲基丙酸的溶剂,二羟甲基丙酸为亲水扩链剂,使乳液颗粒均匀分散在水溶剂中,降低喷漆乳液微粒粒径。环氧树脂提高喷漆黏度与硬度。三乙胺用于调节pH,丙酮作为稀释剂,引发剂用于引发甲基丙烯酸甲酯在喷漆体系中进行反应,甲基丙烯酸甲酯改性聚氨酯涂料增加涂膜的硬度。
腰果壳油主要包含四种主要组分,分别为腰果酚、腰果酸、强心酸以及2-甲基强心酸,含有大量的烷基柔性链以及羟基和羧基,在共混交联反应接枝过程中,将羧基与聚蓖麻油酸酯、异佛尔酮二异氰酸酯和聚醚多元醇酯化反应生成酯基,提高预聚体的交联效果。喷漆整体关联性提高以及引入刚性基团苯基,使漆膜的硬度、耐磨性能提高。同时引入聚蓖麻油酸酯、烷基柔性链以及柔性酯基链,降低喷漆玻璃化转变温度,从而降低喷漆的最低成膜温度,使喷漆的最低成膜温度可低至10-15℃,使在较低温度下,喷漆不易出现泛白、开裂以及成型粉状物质的问题,从而使喷漆在较低温度下使用后,漆膜具有较好的平整度。
可选的,所述聚蓖麻油酸酯为六聚蓖麻油酸酯。
通过上述技术方案,当聚蓖麻油酸酯相对分子质量较小时,腰果壳油与聚蓖麻油酸酯接枝时,腰果壳油接枝在聚蓖麻油酸酯上的基团之间具有较大的空间位阻效应,使聚蓖麻油酸酯上羟基的接枝率较低,使喷漆内羟基分子以及羧基分子含量较多,从而使喷漆中氢键含量增加,分子链之间的范德华力增大,链段移动受阻,使喷漆玻璃化转变温度较高。
六聚蓖麻油酸酯具有较为大的相对分子质量,且分子多为柔性的长链,降低了腰果壳油接枝在聚蓖麻油酸酯上的基团之间的空间位阻效应,使六聚蓖麻油酸酯分子上羟基接枝率提高,降低喷漆中氢键分子的含量,显著降低喷漆玻璃化转变温度,从而降低喷漆的最低成膜温度。
可选的,其制备方法如下:
S1,原料准备,按所需重量份称取原料,待用;
S2,多重交联反应:在干燥氮气保护下,将异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯和腰果壳油75-90℃下搅拌反应5-7h,再降温至50-60℃加入扩链剂和丙酮进行1-2h扩链反应;之后,再加入二羟甲基丙酸、N-甲基吡咯烷酮和环氧树脂搅拌反应0.5-1h;
S3,乳化:降温至20-40℃,加入三乙胺中和至中性,并加入水,1000-1200r/min搅拌速度下进行分散乳化,减压脱去丙酮;
S4,自由基乳液聚合:将S3步骤得到的产物加入甲基丙烯酸甲酯,并加入引发剂,70-80℃下搅拌反应1.5-2h;
S5,配漆:将S4步骤得到的产物中加入其他助剂,1000-1200r/min搅拌速度下搅拌混合均。
通过上述技术方案,制备得到具有较低的最低成膜温度的环保水性喷漆,使低温下喷涂后漆膜平整度好。
可选的,S2步骤中还添加有重量份为0.4-0.8份的苯二甲酸,异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯、腰果壳油和苯二甲酸在75-90℃下搅拌反应5-7h。
通过上述技术方案,一个苯二甲酸含有2个羧基,苯二甲酸作为桥梁通过羧基与六聚蓖麻油酸酯以及腰果壳油上羟基接枝,提高六聚蓖麻油酸酯与腰果壳油的接枝率,降低分子间氢键的含量,进一步降低玻璃化转变温度,降低喷漆的最低成膜温度。且引入刚性分子基团苯基,使喷漆成膜后漆膜的硬度提高。
可选的,所述S2步骤中,异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯、腰果壳油和苯二甲酸的反应温度为86℃,反应时间为5.5h。
通过上述技术方案,反应温度为86℃条件下,聚蓖麻油酸酯、腰果壳油与苯二甲酸的接枝率较高,使最低成膜温度较低、漆膜硬度较高,且反应时间为5.5h可完成反应,节约时间,提高生产效率。
可选的,所述其他助剂包括流平剂和消泡剂,所述流平剂与消泡剂的重量比为(0.6-0.8):3。
通过上述技术方案,流平剂使喷漆具有较好的流动性,消泡剂上喷漆不易产生气泡,在流平剂与消泡剂的重量比为(0.6-0.8):3的条件下,两个成分添加量适中,既不会因消泡剂过多导致漆膜出现缩孔,也不会因流平剂过多使消泡剂效果差。
可选的,所述引发剂为偶氮二异丁腈。
通过上述技术方案,偶氮二异丁腈引发甲基丙烯酸甲酯单体聚合生成微乳,从而改性聚氨酯乳液,得到喷漆。
第二方面,本申请提供一种喷漆工艺,采用如下的技术方案:
一种喷漆工艺,包括以下步骤:
S1,木制品表面处理,将木制品表面进行打磨后,采用乙醇擦拭木制品表面除去木制品表面油脂;
S2,木制品热处理,将表面处理后的木制品在70-80℃下干燥4-5h;
S3,喷漆,将低污染高平整度喷漆喷涂至热处理后的木制品表面,喷涂量为0.4-0.8kg/m²,喷涂压力3-4kg/cm²;喷枪口距离产品表面25-30cm;喷涂时相对湿度在70%以下,常温晾干。
通过上述技术方案,在木制品表面进行喷漆,漆膜平整度好且漆膜的硬度高。
综上所述,本申请具有以下有益效果:
1、异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯和腰果壳油共混交联反应,降低喷漆玻璃化转变温度,使喷漆的最低成膜温度可低至10-15℃。
2、本申请中优选采用六聚蓖麻油酸酯,降低喷漆中氢键分子的含量,降低喷漆的最低成膜温度。
3、通过苯二甲酸的添加,提高六聚蓖麻油酸酯与腰果壳油的接枝率,进一步降低喷漆的最低成膜温度。
具体实施方式
以下结合实施例对本申请作进一步详细说明。
原料名称 | 种类或来源 |
异佛尔酮二异氰酸酯 | 江苏普乐司生物科技有限公司出售,工业级 |
聚醚多元醇 | 深圳维明德科技有限公司出售的聚醚多元醇330N |
聚蓖麻油酸酯 | 嘉祥县大海化工有限公司出售的二聚蓖麻油酸酯,四聚蓖麻油酸酯,六聚蓖麻油酸酯 |
腰果壳油 | 江苏圣仑化工科技有限公司出售的越南牌腰果壳油 |
扩链剂 | 1,4-丁二醇 |
环氧树脂 | 廊坊利峻防腐材料有限公司出售的环氧树脂 |
二羟甲基丙酸 | 山东力昂新材料科技有限公司出售的2,2-二羟甲基丙酸LA-6G |
N-甲基吡咯烷酮 | 济南鑫伟达化工有限公司出售的N-甲基吡咯烷酮,工业级 |
甲基丙烯酸甲酯 | 南昌虹盾防水材料有限公司出售的甲基丙烯酸甲酯AMP-LM |
引发剂 | 济南汇锦川化工有限公司出售的偶氮二异丁腈,工业级 |
苯二甲酸 | 南通润丰石油化工有限公司出售的对苯二甲酸,工业级 |
其他助剂 | 广州市汇翔化工有限公司出售的水性聚氨酯流平剂SN612和斯涂源牌海名斯德谦Defom 5300消泡剂,且流平剂与消泡剂用量的重量比为(0.6-0.8):3 |
实施例
实施例1
一种低污染高平整度喷漆,包含以下重量的原料:
异佛尔酮二异氰酸酯 20kg;
聚醚多元醇330N 20kg;
二聚蓖麻油酸酯 4kg;
腰果壳油 2kg;
1,4-丁二醇 2kg;
环氧树脂 5kg;
2,2-二羟甲基丙酸LA-6G 3kg;
N-甲基吡咯烷酮 2kg;
甲基丙烯酸甲酯AMP-LM 10kg;
偶氮二异丁腈 3kg;
丙酮 40kg;
三乙胺 2kg;
水 70kg;
流平剂 0.6kg。
消泡剂 3kg。
低污染高平整度喷漆的制备方法如下:
S1,原料准备,按上述所需重量称取原料,待用;
S2,多重交联反应:在干燥氮气保护下,将异佛尔酮二异氰酸酯、聚醚多元醇330N、二聚蓖麻油酸酯和腰果壳油75℃下搅拌反应7h,再降温至50℃加入1,4-丁二醇和丙酮进行2h扩链反应;之后,再加入2,2-二羟甲基丙酸LA-6G、N-甲基吡咯烷酮和环氧树脂搅拌反应1h;
S3,乳化:降温至20℃,加入三乙胺中和至中性,并加入水,1000r/min搅拌速度下进行分散乳化,减压脱去丙酮;
S4,自由基乳液聚合:将S3步骤得到的产物加入甲基丙烯酸甲酯,并加入偶氮二异丁腈,70℃下搅拌反应2h;
S5,配漆:将S4步骤得到的产物中加入流平剂和消泡剂,在1000r/min搅拌速度下搅拌混合均。
一种喷漆工艺,包括以下步骤:
S1,木制品表面处理,将木制品表面进行打磨后,采用乙醇擦拭木制品表面除去木制品表面油脂;
S2,木制品热处理,将表面处理后的木制品在70℃下干燥5h;
S3,喷漆,将制备得到的低污染高平整度喷漆喷涂至热处理后的木制品表面,喷涂量为0.4kg/m²,喷涂压力3kg/cm²;喷枪口距离产品表面25cm;喷涂时相对湿度在55%,常温晾干。
实施例2
与实施例1的区别在于,一种低污染高平整度喷漆,包含以下重量的原料:
异佛尔酮二异氰酸酯 30kg;
聚醚多元醇330N 30kg;
二聚蓖麻油酸酯 6kg;
腰果壳油 3kg;
1,4-丁二醇 3kg;
环氧树脂 8kg;
2,2-二羟甲基丙酸LA-6G 5kg;
N-甲基吡咯烷酮 4kg;
甲基丙烯酸甲酯AMP-LM 15kg;
偶氮二异丁腈 4kg;
丙酮 50kg;
三乙胺 3kg;
水 90kg;
流平剂 0.8kg。
消泡剂 3kg。
实施例3
与实施例1的区别在于,一种低污染高平整度喷漆,包含以下重量的原料:
异佛尔酮二异氰酸酯 25kg;
聚醚多元醇330N 25kg;
二聚蓖麻油酸酯 5kg;
腰果壳油 1.5kg;
1,4-丁二醇 2.5kg;
环氧树脂 6kg;
2,2-二羟甲基丙酸LA-6G 4kg;
N-甲基吡咯烷酮 3kg;
甲基丙烯酸甲酯AMP-LM 13kg;
偶氮二异丁腈 3.5kg;
丙酮 45kg;
三乙胺 2.5kg;
水 80kg;
流平剂 0.7kg。
消泡剂 3kg。
实施例4
与实施例3的区别在于,低污染高平整度喷漆的制备方法如下:
S1,原料准备,按上述所需重量称取原料,待用;
S2,多重交联反应:在干燥氮气保护下,将异佛尔酮二异氰酸酯、聚醚多元醇330N、二聚蓖麻油酸酯和腰果壳油90℃下搅拌反应5h,再降温至60℃加入1,4-丁二醇和丙酮进行2h扩链反应;之后,再加入2,2-二羟甲基丙酸LA-6G、N-甲基吡咯烷酮和环氧树脂搅拌反应1h;
S3,乳化:降温至40℃,加入三乙胺中和至中性,并加入水, 1200r/min搅拌速度下进行分散乳化,减压脱去丙酮;
S4,自由基乳液聚合:将S3步骤得到的产物加入甲基丙烯酸甲酯,并加入偶氮二异丁腈,80℃下搅拌反应1.5h;
S5,配漆:将S4步骤得到的产物中加入流平剂和消泡剂,在1200r/min搅拌速度下搅拌混合均。
实施例5
与实施例3的区别在于,低污染高平整度喷漆的制备方法如下:
S1,原料准备,按上述所需重量称取原料,待用;
S2,多重交联反应:在干燥氮气保护下,将异佛尔酮二异氰酸酯、聚醚多元醇330N、二聚蓖麻油酸酯和腰果壳油80℃下搅拌反应6h,再降温至55℃加入1,4-丁二醇和丙酮进行1.5h扩链反应;之后,再加入2,2-二羟甲基丙酸LA-6G、N-甲基吡咯烷酮和环氧树脂搅拌反应0.8h;
S3,乳化:降温至30℃,加入三乙胺中和至中性,并加入水, 1200r/min搅拌速度下进行分散乳化,减压脱去丙酮;
S4,自由基乳液聚合:将S3步骤得到的产物加入甲基丙烯酸甲酯,并加入偶氮二异丁腈,75℃下搅拌反应1.8h;
S5,配漆:将S4步骤得到的产物中加入流平剂和消泡剂,在1100r/min搅拌速度下搅拌混合均。
实施例6
与实施例5的区别在于,一种喷漆工艺,包括以下步骤:
S1,木制品表面处理,将木制品表面进行打磨后,采用乙醇擦拭木制品表面除去木制品表面油脂;
S2,木制品热处理,将表面处理后的木制品在80℃下干燥4h;
S3,喷漆,将制备得到的低污染高平整度喷漆喷涂至热处理后的木制品表面,喷涂量为0.8kg/m²,喷涂压力4kg/cm²;喷枪口距离产品表面30cm;喷涂时相对湿度在60%,常温晾干。
实施例7
与实施例5的区别在于,一种喷漆工艺,包括以下步骤:
S1,木制品表面处理,将木制品表面进行打磨后,采用乙醇擦拭木制品表面除去木制品表面油脂;
S2,木制品热处理,将表面处理后的木制品在75℃下干燥5h;
S3,喷漆,将制备得到的低污染高平整度喷漆喷涂至热处理后的木制品表面,喷涂量为0.6kg/m²,喷涂压力3.5kg/cm²;喷枪口距离产品表面28cm;喷涂时相对湿度在65%,常温晾干。
实施例8
与实施例5的区别在于,四聚蓖麻油酸酯等量替代二聚蓖麻油酸酯。
实施例9
与实施例5的区别在于,六聚蓖麻油酸酯等量替代二聚蓖麻油酸酯。
实施例10
与实施例9的区别在于,S2步骤中还添加有0.6kg的苯二甲酸,异佛尔酮二异氰酸酯、聚醚多元醇330N、六聚蓖麻油酸酯、腰果壳油和苯二甲酸在80℃下搅拌反应6h。
实施例11
与实施例10的区别在于,异佛尔酮二异氰酸酯、聚醚多元醇330N、六聚蓖麻油酸酯、腰果壳油和苯二甲酸的反应温度为86℃,反应时间为5.5h。
实施例12
与实施例10的区别在于,异佛尔酮二异氰酸酯、聚醚多元醇330N、六聚蓖麻油酸酯、腰果壳油和苯二甲酸的反应温度为90℃,反应时间为5.5h。
实施例13
与实施例10的区别在于,异佛尔酮二异氰酸酯、聚醚多元醇330N、六聚蓖麻油酸酯、腰果壳油和苯二甲酸的反应温度为86℃,反应时间为6h。
实施例14
与实施例11的区别在于,苯二甲酸添加量为0.4kg。
实施例15
与实施例11的区别在于,苯二甲酸添加量为0.8kg。
实施例16
与实施例11的区别在于,苯二甲酸的添加量为0.2kg。
实施例17
与实施例11的区别在于,苯二甲酸的添加量为1kg。
对比例1
与实施例5的区别在于,蓖麻油等量替代二聚蓖麻油酸酯。
对比例2
与实施例5的区别在于,不添加二聚蓖麻油酸酯。
对比例3
与实施例5的区别在于,不添加腰果壳油。
对比例4
与实施例5的区别在于,不添加二聚蓖麻油酸酯和腰果壳油。
性能检测试验
参照GB 9267-1988《乳胶漆用乳液最低成膜温度测定法》测定实施例1-5、实施例8-17以及对比例1-4的低污染高平整度喷漆的最低成膜温度,实验结果详见表1。
参照ISO15184:1988《薄膜硬度测试》测定实施例1-5、实施例8-17以及对比例1-4的低污染高平整度喷漆的硬度,实验结果详见表1。
参照ISO 7784-2:1997《色漆和清漆-耐磨性的测定-旋转橡胶砂轮法》测定实施例1-5、实施例8-17以及对比例1-4的低污染高平整度喷漆的耐磨耗性,实验结果详见表1。
参照GB/T 9286-1998《色漆和清漆 漆膜的划格试验》测定实施例1-5、实施例8-17以及对比例1-4的低污染高平整度喷漆的附着力等级,实验结果详见表1。
表1
最低成膜温度℃ | 硬度 | 耐磨性(750g/1000r)g | 附着力/级 | |
实施例1 | 13 | H | 0.079 | 2 |
实施例2 | 12 | H | 0.076 | 2 |
实施例3 | 12 | H | 0.072 | 2 |
实施例4 | 13 | H | 0.077 | 2 |
实施例5 | 12 | H | 0.071 | 2 |
实施例8 | 11 | H | 0.064 | 2 |
实施例9 | 9 | 2H | 0.052 | 2 |
实施例10 | 7 | 3H | 0.043 | 2 |
实施例11 | 6 | 3H | 0.038 | 2 |
实施例12 | 7 | 3H | 0.044 | 2 |
实施例13 | 6 | 3H | 0.033 | 2 |
实施例14 | 7 | 3H | 0.047 | 2 |
实施例15 | 7 | 3H | 0.048 | 2 |
实施例16 | 8 | 2H | 0.050 | 2 |
实施例17 | 9 | 3H | 0.034 | 2 |
对比例1 | 18 | HB | 0.121 | 3 |
对比例2 | 18 | HB | 0.093 | 2 |
对比例3 | 17 | HB | 0.089 | 2 |
对比例4 | 20 | H | 0.094 | 2 |
结合实施例1-5和对比例1并结合表1可以看出,蓖麻油相对分子质量比聚蓖麻油酸酯,使腰果壳油内部成分接枝在蓖麻油上的基团之间空间位阻效应大,使交联反应效果差,从而使喷漆中蓖麻油、腰果壳油残留质量大,从而使喷漆漆膜的硬度、耐磨性和附着力较差。
结合实施例5以及实施例8-9并结合表1可以看出,六聚蓖麻油酸酯与四聚蓖麻油酸酯和二聚蓖麻油酸酯相比,六聚蓖麻油酸酯具有较大的相对分子质量,从而减小其与腰果壳油接枝的空间位阻,方便交联形成网络结构,使漆膜交联紧密,从而提高喷漆漆膜的硬度、耐磨性。且在漆膜中引入大量柔性长链以及接枝反应中生成大量柔性酯基,降低喷漆的玻璃化温度,从而降低漆膜的最低成膜温度。
结合实施例9和实施例10并结合表1可以看出,苯二甲酸作为六聚蓖麻油酸酯与腰果壳油接枝的桥梁,进一步提高六聚蓖麻油酸酯与腰果壳油的接枝率,提高交联紧密度,从而提高漆膜的硬度与耐磨性。且通过消除喷漆体系中氢键的含量,降低喷漆的最低成膜温度。
结合实施例10-13并结合表1可以看出,当异佛尔酮二异氰酸酯、聚醚多元醇330N、六聚蓖麻油酸酯、腰果壳油和苯二甲酸的反应温度为86℃,反应时间为6h时,因六聚蓖麻油酸酯、腰果壳油和苯二甲酸的接枝反应效果较好,使漆膜的硬度、耐磨性较好,且最低成膜温度较低。
结合实施例11以及实施例14-17并结合表1可以看出,当苯二甲酸的添加量范围在0.4-0.8kg时,喷漆的硬度、耐磨性较好,且最低成膜温度较低。其原因是,当苯二甲酸添加量过少时,苯二甲酸的两不足以使大量六聚蓖麻油酸酯、腰果壳油进行接枝;当苯二甲酸添加量过多时,苯二甲酸单体大量存在喷漆体系中,增加分子链之间的氢键,虽然使喷漆漆膜的硬度较高,但是最低成膜温度也相应提高。
结合实施例5以及实施例2-4并结合表1可以看出,单量添加腰果壳油或二聚蓖麻油酸酯对喷漆的硬度、耐磨性以及最低成膜温度影响较小,最低成膜温度达不到小于15℃的需求。
本具体实施例仅仅是对本申请的解释,其并不是对本申请的限制,本领域技术人员在阅读完本说明书后可以根据需要对本实施例做出没有创造性贡献的修改,但只要在本申请的权利要求范围内都受到专利法的保护。
Claims (7)
1.一种低污染高平整度喷漆,其特征在于,包含以下重量份的组分:
异佛尔酮二异氰酸酯20-30份;
聚醚多元醇20-30份;
聚蓖麻油酸酯4-6份;
腰果壳油2-3份;
扩链剂2-3份;
环氧树脂5-8份;
二羟甲基丙酸3-5份;
N-甲基吡咯烷酮2-4份;
甲基丙烯酸甲酯10-15份;
引发剂3-4份;
丙酮40-50份;
三乙胺2-3份;
水70-90份;
其他助剂4-6份;
其制备方法如下
S1,原料准备,按所需重量份称取原料,待用;
S2,多重交联反应:在干燥氮气保护下,将异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯和腰果壳油75-90℃下搅拌反应5-7h,再降温至50-60℃加入扩链剂和丙酮进行1-2h扩链反应;之后,再加入二羟甲基丙酸、N-甲基吡咯烷酮和环氧树脂搅拌反应0.5-1h;
S3,乳化:降温至20-40℃,加入三乙胺中和至中性,并加入水,1000-1200r/min搅拌速度下进行分散乳化;减压脱去丙酮;
S4,自由基乳液聚合:将S3步骤得到的产物加入甲基丙烯酸甲酯,并加入引发剂,70-80℃下搅拌反应1.5-2h;
S5,配漆:将S4步骤得到的产物中加入其他助剂,1000-1200r/min搅拌速度下搅拌混合均。
2.根据权利要求1所述的一种低污染高平整度喷漆,其特征在于:所述聚蓖麻油酸酯为六聚蓖麻油酸酯。
3.根据权利要求1所述的一种低污染高平整度喷漆,其特征在于:S2步骤中还添加有重量份为0.4-0.8份的苯二甲酸,异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯、腰果壳油和苯二甲酸在75-90℃下搅拌反应5-7h。
4.根据权利要求3所述的一种低污染高平整度喷漆,其特征在于:所述S2步骤中,异佛尔酮二异氰酸酯、聚醚多元醇、聚蓖麻油酸酯、腰果壳油和苯二甲酸的反应温度为86℃,反应时间为5.5h。
5.根据权利要求1所述的一种低污染高平整度喷漆,其特征在于:所述其他助剂包括流平剂和消泡剂,所述流平剂与消泡剂的重量比为(0.6-0.8):3。
6.根据权利要求1所述的一种低污染高平整度喷漆,其特征在于:所述引发剂为偶氮二异丁腈。
7.一种喷漆工艺,其特征在于,包括以下步骤:
S1,木制品表面处理,将木制品表面进行打磨后,采用乙醇擦拭木制品表面除去木制品表面油脂;
S2,木制品热处理,将表面处理后的木制品在70-80℃下干燥4-5h;
S3,喷漆,将利要求1-6任一项所述的低污染高平整度喷漆喷涂至热处理后的木制品表面,喷涂量为0.4-0.8kg/m²,喷涂压力3-4kg/cm²;喷枪口距离产品表面25-30cm;喷涂时相对湿度在70%以下,常温晾干。
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