水可稀释性醇酸树脂及其氨基烘漆的制备

通过在醇酸树脂合成过程中,引入含磺酸盐基的5-(钠代磺基)间苯二甲酸(5-SSIPA)单体,制备了水可稀释性醇酸树脂。用该醇酸树脂,配以水性氨基树脂,制备了性能优异的水性氨基醇酸烘漆,并对影响树脂和漆膜性能的因素进行了探讨。     

新型水性醇酸 /丙烯酸复合分散体漆膜耐水性影响因素研究

以中长油度醇酸树脂、丙烯酸（酯）类单体等为主要原料,以过氧化苯甲酰为引发剂,通过先溶液聚合再高速乳化工艺,合成了具有核壳结构的新型水性醇酸 /丙烯酸复合分散体,并对其漆膜耐水性影响因素进行了研究。重点考察了醇酸树脂油度、醇酸树脂与丙烯酸酯单体比例、丙烯酸酯硬单体的比例、丙烯酸及丙烯酸十八酯用量对分散体粒径及漆膜耐水性的影响。结果表明：醇酸树脂油度为 57. 5%,醇酸树脂与丙烯酸酯类单体质量比为 6. 3∶3. 7,丙烯酸酯硬单体 MMA和 St质量比在 8∶2至 6. 5∶3. 5之间,丙烯酸用量在 3. 22%~7. 70%之间,丙烯酸十八酯用量 3. 03%时,复合分散体漆膜耐水性及综合性能较优。     

导读

正杨立峰等以桐亚油酸、亚油酸、季戊四醇、新戊二醇、间苯二甲酸、苯甲酸、顺丁烯二酸酐等为原料合成基础醇酸树脂,然后将苯乙烯、丙烯酸类单体、有机硅单体等混合后接枝到基础醇酸树脂分子中,制备了一种水性涂料用高光自干型水性丙烯酸改性醇酸树脂。利用红外光谱、核磁共振波谱、Zeta电位纳米粒度分析仪、接触角测量仪表征了树脂的分子结构以及其乳液的粒径、接触角,并根据相关国家标准对漆膜性能进行表征。结果表明:该水性醇酸树脂具有光泽度高、常温自干、耐水性强.附着力优异等特点,可用来制备高光自干型水性醇酸防腐涂料。     

水性苯丙共聚物改性醇酸树脂的制备及性能

以油酸、季戊四醇、邻苯二甲酸酐、苯甲酸为原料,采用丙二醇甲醚醋酸酯（PMA）为溶剂合成了基体醇酸树脂;用过氧化苯甲酰、过氧化苯甲酸叔丁酯双引发剂、分步引发烯类单体共聚,制备了一种苯丙烯树脂,并对醇酸树脂改性制得了水性醇酸树脂。考察了不同油度对水性醇酸树脂结构与性能的影响。通过FTIR、TGA、DLS分别对树脂的结构、稳定性和乳液性能进行了表征。测定了树脂的漆膜性能,包括耐水性、表干时间、硬度、电化学性能。结果表明,n（油酸）∶n（季戊四醇）∶n(邻苯二甲酸酐)∶n（苯甲酸）=1∶1∶1∶0.3,油度为47%时,聚合物乳液粒径为74.4 nm,PDI为0.262,胶膜的吸水率为14.5%,接触角为70.87?,有较好的耐水性。改性醇酸树脂的表干时间缩短为0.5 h,实干时间缩短为24 h,硬度达HB。     

醇酸树脂合成配方与工艺对醇酸涂料性能的影响研究

通过对3种不同配方与工艺的醇酸树脂的合成进行实验,并将该3种树脂按相同比例制备成相应的醇酸漆,对3种漆的漆膜性能进行检测,旨在对比不同配方与工艺下合成的醇酸树脂对醇酸涂料各项性能的影响,为醇酸漆生产企业和使用单位提供参考与选择。     

水溶性醇酸氨基烘漆的研制

采用饱和脂肪酸、苯酐、三羟甲基丙烷、新戊二醇和偏苯三酸酐合成水溶性醇酸树脂,与甲醚化三聚氰胺甲醛树脂制备水溶性醇酸氨基烘漆。该水溶性醇酸氨基烘漆的漆膜性能均达到并超过溶剂型醇酸氨基烘漆的漆膜性能。讨论了酸值、羟值、油度、氨基树脂、中和剂、助溶剂和树脂结构等因素对树脂合成及应用性能的影响。水溶性醇酸氨基烘漆与水性醇酸防锈底漆配套使用具有优异的防腐性能。     

苯甲酸改性水性醇酸树脂及氨基烤漆的制备

在水性醇酸树脂合成过程中,引入苯甲酸刚性基团,制备出水性醇酸树脂,并用该醇酸树脂搭配水性氨基树脂制备了水性氨基烤漆,该产品光泽高,性能优异。此外,对影响树脂和漆膜性能的因素也进行了分析总结。     

UV底漆用自干热塑性丙烯酸树脂的研究

引入自制的磷酸酯功能单体,制备的丙烯酸树脂在不外加防掉银助剂的情况下,达到不掉银效果。讨论了引发剂的种类和用量、溶剂、玻璃化温度、相对分子质量调节剂、甲基丙烯功能单体等对树脂性能的影响。重点讨论了磷酸酯功能单体对漆膜防掉银性能的影响及其机理。制备的热塑性丙烯酸树脂各项综合性能优异。     

高光自干型水性醇酸树脂的制备及其性能研究

以桐亚油酸、亚油酸、季戊四醇、新戊二醇、间苯二甲酸、苯甲酸、顺丁烯二酸酐等为原料合成基础醇酸树脂,并将苯乙烯、丙烯酸类单体、有机硅单体等混合后接枝到基础醇酸树脂分子中,制备了一种水性涂料用高光自干型水性丙烯酸改性醇酸树脂。利用红外光谱(FT-IR)、核磁共振波谱(1H NMR)、Zeta电位纳米粒度分析仪、接触角测量仪表征了树脂的分子结构以及其乳液的粒径、接触角,并根据相关国家标准对漆膜性能进行表征。结果表明:该水性醇酸树脂具有光泽度高、常温自干、耐水性强、附着力优异等特点,可用来制备高光自干型水性醇酸防腐涂料。     

磷酸酯改性丙烯酸水性防锈漆的制备

以五氧化二磷与甲基丙烯酸羟丙酯自制了功能性磷酸酯单体,并与丙烯酸、甲基丙烯酸甲酯、丙烯酸丁酯、丙烯酸羟丙酯等单体,以偶氮二异丁腈为引发剂,在乙二醇丁醚中进行聚合,合成了改性丙烯酸树脂。将其与固化剂氨基树脂混合即得一种水性防锈漆。考察了原料用量对漆膜性能的影响,得到最优制备条件为:甲基丙烯酸羟丙酯与五氧化二磷的摩尔比为2.0,磷酸酯用量(占单体总质量,后同)5%,丙烯酸用量20%,甲基丙烯酸甲酯用量35%。所得漆膜可耐5%Na Cl溶液浸泡30 d,冲击强度50 kg·cm,附着力0级,柔韧性3 mm,铅笔硬度HB。     

Synthesis and properties of hybrid alkyd–acrylic dispersions and their use in VOC-free waterborne coatings

Hybrid waterborne alkyd–acrylic dispersions with solid content of 40%, free from any surfactant and exempt of any organic solvent, were successfully synthesized by a melt co-condensation reaction between an acrylic prepolymer bearing carboxylic groups and a long-oil alkyd resin. Spontaneous emulsification of the ensuing hybrid resin was achieved by the addition of an aqueous ammonia solution that neutralized the carboxylic functions. The key role of the carboxylic groups on the stabilization process and on the storage stability of the dispersion was assessed and it was shown that the insertion of anhydride moieties within the acrylic prepolymer ensured the efficient coupling between the acrylic and the alkyd resin and prevented the phase separation. These dispersions are easy to implement and might be used to prepare high quality zero VOC coatings in terms of drying time, stability and gloss. The most stable dispersion was also used in the formulation of air-drying waterborne lacquers and their coating properties were evaluated.     

苯乙烯改性醇酸树脂合成研究

研究了采用顺丁烯二酸酐衍生物、苯乙烯与基体醇酸树脂反应制备苯乙烯改性醇酸树脂的方法、工艺条件和产品性能。该树脂涂膜快干、硬度高、耐水性好 ,同时具有与醇酸树脂相似的外观和耐冲击性能。     

环氧改性水性醇酸树脂的制备

首先以亚麻酸、环氧树脂为原料制备环氧酯,再将环氧酯作为多元醇与亚麻酸、三羟甲基丙烷、苯酐、偏酐等进行酯化反应,经胺中和后得到一种环氧改性水性醇酸树脂,采用红外光谱对产物结构进行了表征并对其粒径分布作了分析,研究表明:醇酸树脂油度50%,终点酸值50～60,选用环氧树脂E-20与亚麻酸、三羟甲基丙烷、苯酐采用溶剂法反应,之后加入偏苯三酸酐采用熔融法反应可以得到干性好、硬度高、稳定性、水分散性和耐水性优良的环氧改性水性醇酸树脂。     

紫胶和顺丁烯二酸酐改性水性醇酸树脂合成的影响因素

以紫胶、蓖麻油、顺丁烯二酸酐、三羟甲基丙烷、偏苯三酸酐为原料,采用熔融法合成了水性醇酸树脂。研究了紫胶用量、蓖麻油酸加量、脂肪酸类型、多元醇类型和酯化时间对树脂性能的影响,确定了最佳的工艺参数。所得醇酸树脂产品的贮存稳定性、耐水性、耐冲击性、硬度、柔韧性等综合性能良好。     

紫胶改性水性醇酸树脂的合成工艺研究

从改进树脂综合性能着手,研究了水性醇酸树脂的合成工艺。确定了以熔融法和分步加料来制备醇酸树脂。以紫胶部分替代三羟甲基丙烷,顺丁烯二酸酐/偏苯三酸酐部分替代苯酐,所得水性醇酸树脂的干燥性能、硬度和柔韧性等性能得以提高。紫胶用量以5%为宜。     

Optimized synthesis and properties of surfactant-free water-reducible acrylate-alkyd resin emulsion

In this work, a modified alkyd resin (basic alkyd resin) was synthesized using maleic anhydride (MAH) to replace part of phthalic anhydride (PA) to achieve the target product acrylate-grafted-alkyd hybrid resin. The resin was then dispersed in water to form water-reducible emulsion. The properties were examined, including the extent of neutralization of final emulsion, ratio of MAH/PA in basic alkyd resin, mole ratio of basic alkyd resin to modified vinyl monomers, mole ratio of vinyl monomers (MMA/St/AA) on water dispersion stability of emulsion, particle size, drying time and mechanical properties. The optimal synthesis conditions produced a final emulsion particle size of 81.1 nm with good storage stability, hydrolytic stability and shorter drying time. The optimized synthesis conditions were identified as 80% neutralization, 1:0.8 mole ratio of basic alkyd resin to modified monomers, 4:3:2 modified monomers MMA/St/AA and 0.18 mole ratio of MAH/PA.     

Preparation and characterization of water reducible alkyd resin/colloidal silica nanocomposite coatings

In this study, water reducible alkyd resins containing different amounts of colloidal silica were synthesized for the first time. In order to achieve this, alkyd resin, which has an oil content of 35%, was prepared with tall oil fatty acid, isophthalic acid, trimellitic anhydride, and trimethylolpropane. The alkyd resin was neutralized with triethylamine, and was dissolved in an isobutyl alcohol-isopropyl alcohol-butyl glycol mixture to produce 75% (wt.) solution, which was called stock alkyd resin. The stock alkyd resin was diluted with water to 50% (wt.) concentration with water and colloidal silica mixture in order to prepare an alkyd solution containing 0%, 5%, 10%, 15% and 20% colloidal silica. Then the effect of the silica nanoparticle addition on the surface coating properties, thermal behaviors and surface morphologies of water reducible alkyd resins was investigated. As a result, the addition of colloidal silica has improved surface coating properties and thermal behaviors of nanocomposite water reducible alkyd resin.     

水分散型醇酸树脂的合成及性能研究

以脂肪油、邻苯二甲酸酐、偏苯三酸酐和三羟甲基丙烷为主要原料合成了水分散性醇酸树脂。以原料中酸酐的比例为基础设计了合成配方,讨论了合成工艺、脂肪油的种类和比例以及醇解催化剂对水分散性醇酸树脂性能的影响。     

高装饰性改性醇酸家具涂料

介绍了用苯甲酸改性的含羟基醇酸树脂和甲苯二异氰酸酯(TDI)预聚物的合成工艺,以及由二者制成醇酸型聚氨酯涂料的方法;讨论了合成的醇酸树脂、TDI预聚物、固化剂种类和用量、溶剂、助剂和颜填料对涂料及涂膜性能的影响。制备得到的改性醇酸家具涂料成本不仅比聚酯涂料低,而且其涂膜的光泽高、丰满度好、硬度高、干性好,施工性能也有所改善。