聚合方法对水性羟基丙烯酸树脂及相应2K-WPU性能的影响

分别通过溶液聚合、乳液聚合和两步聚合法制备了3种水性羟基丙烯酸树脂(PAS、PAE、PAT),采用傅里叶变换红外光谱(FT-IR)、动态光散射(DLS)和示差扫描量热法(DSC)对所合成树脂进行了表征。在无催化剂存在的条件下,分别将3种水性树脂与异氰酸酯固化剂Bayhydur XP 2655以及助剂混合得到双组分水性聚氨酯清漆,通过红外光谱对固化后清漆结构进行了表征,并对3种水性清漆的性能进行了研究。实验结果表明基于PAT的水性清漆综合性能较优。     

氟改性双组分水性丙烯酸聚氨酯涂料性能研究

以甲基丙烯酸十二氟庚酯（DFMA）、丙烯酸（AA）、甲基丙烯酸羟乙酯（HEMA）、甲基丙烯酸甲酯（MMA）和丙烯酸丁酯（BA）为原料,采用溶液聚合法合成了一系列氟含量不同的水性羟基丙烯酸树脂。将含氟水性羟基丙烯酸树脂、亲水性异氰酸酯固化剂和助剂混合制备氟改性双组分水性丙烯酸聚氨酯（2K—WPU）涂料。利用傅里叶变换红外光谱（FT-IR）对其结构进行了表征,并对涂料的接触角、吸水率和清漆性能分别进行了测试。结果表明,该水性树脂粒径在28．2～68．1nm之间,粒径分布均匀。当水性羟基丙烯酸树脂组成中DFMA质量分数从0增加至20％时,所制备氟改性2K-WPu涂料的水接触角从70．3。增大到97．6。,吸水率从11．4％降低至6．31％,涂膜的耐水性显著提高。清漆性能测试表明,所制氟改性2K．WPu的各项性能优异。     

水性羟基丙烯酸分散体亚光树脂的制备及其性能研究

以叔碳酸缩水甘油酯（ E10P）和钛酸丁酯为溶剂,采用本体聚合法分两步滴加甲基丙烯酸甲酯、丙烯酸丁酯、甲基丙烯酸羟乙酯、苯乙烯、丙烯酸和引发剂的混合溶液,再将上述制备的树脂用碱中和,加水分散,即可得到水性亚光羟基丙烯酸分散体。将制备的树脂与水性多异氰酸酯固化剂固化成膜,测试其性能。结果表明：自制水性羟基丙烯酸分散体物理性能均较好,具有较好的耐水、耐溶剂性能。清漆光泽（ 60°）在 50~60之间,具有优异的亚光性能。     

水性双组分氟丙烯酸—聚氨酯涂料的研制及性能测试

介绍了水性双组分氟丙烯酸-聚氨酯涂料所用原料及其预处理,水性双组分氟丙烯酸-聚氨酯涂料的羟基组分采用两步法合成:第一步合成了具有大分子表面活性剂性能的水性聚氨酯,在合成的过程中引入了双键和羟基组分;然后采用无皂乳液聚合的方法合成了以氟丙烯酸酯为核、聚氨酯为壳的水性树脂。并列举了采用该树脂与水性固化剂配合研制的清漆的性能指标,该清漆有着非常广泛的用途,讨论了影响涂料性能的各种因素。该双组分清漆水性含氟丙烯酸酯-聚氨酯清漆具有优异的综合性能。     

水性丙烯酸酯汽车涂料制备及其漆膜性能研究

合成了水性丙烯酸树脂并用其配制了汽车罩光清漆,研究了硬/软单体配比、丙烯酸单体的用量、芳香酯单体的用量、氨基树脂固化剂/丙烯酸树脂的配比及固化条件对漆膜性能的影响。结果发现,硬/软单体配比为39/35,丙烯酸质量分数为6%,甲基丙烯酸苄酯(BNMA)质量分数为12%,固化剂/树脂配比为40/100,固化温度及时间分别为140℃和30 min时,固化漆膜具有优良的综合性能,其光泽度达到98(60°),冲击强度为0.50 kJ/m,硬度为2H,附着力为0级,耐溶剂、耐紫外老化性能良好。FT-IR分析显示氨基树脂/丙烯酸树脂漆膜固化后表征羟基和甲氧基的吸收峰强度显著变弱,表明氨基树脂和丙烯酸树脂发生了交联固化。     

新型水性紫外光固化聚氨酯丙烯酸酯的制备及性能

以对乙烯基苯磺酸催化季戊四醇和丙烯酸反应,制备出不同羟基含量的季戊四醇丙烯酸酯混合物,进一步与由异佛尔酮二异氰酸酯与聚乙二醇合成的—NCO封端的聚氨酯预聚物反应,得到水性紫外光固化聚氨酯丙烯酸酯。用FT-IR和~1H-NMR表征了产物的结构,讨论了反应的配料比对酯化反应转化率及最终光固化树脂性能的影响。所制备的水性聚氨酯丙烯酸酯光固化速度快、硬度高。当催化剂对乙烯基苯磺酸用量为4%,丙烯酸与季戊四醇物质的量比为3.2∶1时,最终得到的聚氨酯丙烯酸酯光固化涂膜的综合性能最佳。     

水性羟基丙烯酸树脂合成及木器漆研制

以丙烯酸酯类单体为原料,采用预乳化半连续乳液聚合方式合成了水性羟基丙烯酸树脂,考查了羟基组分等因素对树脂的影响;将制备的水性羟基丙烯酸树脂同多种拜耳水性固化剂配制成双组分水性聚氨酯清漆,分析了不同的水性固化剂对漆膜性能的影响。     

紫外光固化水性环氧丙烯酸酯的研究

通过环氧丙烯酸树脂和双羟基化合物反应,获得具有亲水性链段的水性环氧丙烯酸酯。研究了催化剂用量、反应温度和反应时间对转化率的影响,确定了以混合催化剂的最佳反应条件。采用FT-IR红外光谱对所合成的数值进行了表征,表明获得目标产物,并研究其紫外光固化的性能。     

固化剂对水性汽车罩光清漆固化膜性能的影响

合成了水性丙烯酸树脂并用其配制了汽车罩光清漆,通过FT-IR、DSC,TG和SEM分析研究了不同固化剂、固化剂用量对漆膜性能的影响。结果表明,Luwipal066作为固化剂,固化剂/树脂质量比为40/100,固化温度及时间分别为140℃和30min时,固化漆膜性能最好,光泽度达到98/60°,冲击强度为50kg·cm,硬度为2H,附着力为0级,耐溶剂、耐紫外老化性能良好,指标达到汽车罩光漆膜的要求。漆膜固化后表征羟基和甲氧基的吸收峰强度显著变弱,表明氨基树脂和丙烯酸树脂发生了交联固化。随着硬/软单体配比和固化剂/树脂配比的增加,固化漆膜的Tg升高,具有良好的热稳定性。     

复合催化合成水性环氧脂及光固化研究

通过研究不同催化剂对EA(环氧丙烯酸)合成的影响,提出了将性能较好的两种催化剂复配用于EA合成的概念,并研究了复配催化剂及用量对EA合成的影响。结果表明用于EA合成的催化剂用量为1.0%时,复合催化剂EA合成表现出良好的催化和产品性能。并通过环氧丙烯酸树脂和双羟基化合物反应,获得具有亲水性链段的水性环氧丙烯酸酯。研究了催化剂用量和反应温度对转化率的影响,确定了以混合催化剂的最佳反应条件。采用FT-IR红外光谱对所合成的数值进行了表征,表明获得利目的的产物,并研究其紫外光固化的性能。     

4-叔丁基苯甲酸在聚酯树脂及其粉末涂料中的应用

采用对苯二甲酸、间苯二甲酸和新戊二醇为主体,控制单元羧酸4-叔丁基苯甲酸(PTBBA)的加量,合成了具有不同分子结构的聚酯树脂,研究了PTBBA对聚酯树脂及其异氰尿酸三缩水甘油酯(TGIC)和羟烷基酰胺(HAA)2种体系粉末涂料的影响规律,采用差式扫描量热仪(DSC)、凝胶色谱仪(GPC)、傅立叶变换红外光谱(FT-I...     

高固体分羟基丙烯酸树脂合成及性能研究

采用自由基聚合方法制备高固体分羟基丙烯酸树脂,研究了羟基种类、羟基含量、玻璃化转变温度（ Tg）等因素对漆膜柔韧性、耐冲击性、耐腐蚀性、耐老化性能等影响。结果表明：合成得到了高固体分、低黏度的羟基丙烯酸树脂,且当羟基单体为甲基丙烯酸羟乙酯（ HEMA）、羟基含量为 2.1%、树脂 Tg为 0℃时,漆膜性能最好。此时,制备的树脂的固体分为 80.1%、黏度为 3 490 mPa·s、数均相对分子质量为 1 816。     

聚氨酯丙烯酸酯涂料的性能研究

合成了具有不同玻璃化温度、羟值、酸值和相对分子质量的羟基丙烯酸树脂,并采用HDI多异氰酸酯作为固化剂,研究了羟基丙烯酸树脂对双组分聚氨酯涂料性能的影响,结果表明:玻璃化温度、羟值和酸值对聚氨酯涂料的适用期、干燥时间、漆膜硬度、凝胶率等有较大影响;相对分子质量对这些性能的影响较小;漆膜中苯乙烯含量越高,漆膜耐候性越差.     

A novel binder suitable for cationic electrodeposition coatings based on a non-isocyanate chemistry

A non-polyisocyanate resin system that can be applied to cationic electrodeposition (CED) paint has been developed. Most of the compositions of binders currently on the market as CED coatings are composed of modified epoxy resins and blocked polyisocyanates, their crosslinking essentially being polyurethane or polyurea formation. This report deals with a new resin system of which crosslinking is based on a ring-opening/etherification reaction between epoxy groups and hydroxyl groups. The ring-opening addition reaction has very low emissions during the baking process. However, it is difficult to attain a compromise between satisfactory reactivity at elevated temperatures and stability in aqueous composition. By a series of careful investigations, we have established the composition of CED coatings that are sufficiently stable and can be satisfactorily cured. The CED paint formulated on this resin system has such desirable properties as low weight loss upon baking, outstanding weatherability, and excellent chipping resistance. Other characteristics are comparable to existing polyisocyanate based CED coatings.     

Novel water-dispersible glycidyl carbamate (GC) resins and waterborne amine-cured coatings

Water-dispersible glycidyl carbamate (GC) functional resins were synthesized and crosslinked using a water-dispersible amine to form coatings. GC functional resins are synthesized by the reaction of an isocyanate functional compound with glycidol to yield a carbamate (urethane) linkage (–NHCO–) and reactive epoxy group. The combination of both functionalities in a single resin structure imparts excellent mechanical and chemical properties to the coatings. Previous studies on the development of GC coatings have focused on solvent-borne coating systems. In this study, GC resins were modified by incorporating nonionic hydrophilic groups to produce water-dispersible resins. To determine the influence of the content of hydrophilic groups on dispersion stability, aqueous dispersions were made from a series of hydrophilically modified GC resins and characterized for particle size and dispersion stability. The composition of a typical, dispersed GC resin particle was predicted using Monte Carlo simulations. Stable GC dispersions were used to prepare amine-cured coatings. The coatings were characterized for solvent resistance, water resistance, hardness, flexibility, adhesion, and surface morphology. It was observed that GC resins were able to be dispersed in water without using any surfactant and by minimal mixing force (hand mixing) and produced coating films with good properties when crosslinked with a compatible waterborne amine crosslinker.     

低温快干氨基塑料涂料的研制

采用低羟基丙烯酸树脂和混醚化三聚氰胺甲醛树脂在酸催化下 ,低温交联固化形成高光、附着力强、耐候性优良的单组分塑料涂料。讨论了树脂配比、助剂用量、烘干温度等对涂膜性能的影响。     

聚酯丙烯酸杂化多元醇水分散体的制备

以间苯二甲酸-5-磺酸钠(5-SSIPA)与新戊二醇缩聚,制备亲水性中间体.用该中间体与羟基丙烯酸树脂、新戊二醇、三羟甲基丙烷和己二酸进一步缩聚,制得聚酯丙烯酸杂化树脂,加水分散后得其水分散体.研究了反应温度、羟基丙烯酸树脂的玻璃化温度及含量对杂化多元醇水分散体及其相应涂膜性能的影响.结果发现,适宜的杂化反应温度为22...     

High performance moisture cured poly(ether–urethane) amide coatings based on renewable resource (cottonseed oil)

In this investigation, polyetheramide resin was prepared through the condensation polymerization of N,N-bis (2-hydroxyethyl) cottonseed oil fatty amide (HECOFA) with bisphenol-A. It was further modified by 2,4-toluene diisocyanate (TDI) in 10–30 wt% of polyetheramide to develop a series of moisture curing urethane-modified polyetheramide resins (UMCOPEtA). The synthesized resin was characterized using ¹H NMR, ¹³C NMR, FTIR and solubility in various organic solvents at room temperature. The thermal and curing behavior of the resin was investigated using thermogravimetric analysis and differential scanning calorimetric techniques. The physico-chemical properties such as hydroxyl value, iodine value, specific gravity and mechanical properties like scratch hardness, impact, and flexibility were determined by standard laboratory methods. Coatings of UMCOPEtA resin were prepared on mild steel panels to evaluate chemical resistance performance against acid, alkali, water and xylene. The newly developed UMCOPEtA coatings showed improved hardness, impact, gloss, water and chemical resistance when compared with unmodified polyetheramide coatings, and thus were found to be suitable as a high performance coating material.     

丙烯酸系仿生/低表面能海洋防污涂料的研究

采用水溶液法制备了丙烯酸系高吸水树脂.将吸水树脂和用接枝共聚法制备的有机氟改性丙烯酸疏水树脂复合制备仿生涂膜.讨论了反应单体比及烘干温度对吸水树脂吸液率的影响,吸水树脂与疏水树脂的复合比例对涂膜表面结构及涂膜接触角的影响.结果表明：当AM、HPA单体比为1：1,树脂烘干温度为50℃,吸水树脂吸去离子水率达3 000％,吸0.9％NaC1溶液率为367％;当吸水树脂与疏水树脂的比例为1：1时,涂膜表面发生变化,出现类似于鲨鱼皮表面的“沟-槽”结构.