紫外光固化丙烯酸酯硅氧烷防粘剂

以二端羟基二甲基聚硅氧烷和γ-甲基丙烯酰氧丙基三甲氧基硅烷为主要原料，合成制备了具有紫外光固化性能的丙烯酸酯聚硅烷防粘剂预聚体，以此为基础，配制成了具有较好性能的防粘剂，还对分子量，稀释剂等因素对防粘性能的影响进行了分析。     

紫外光固化丙烯酸酯聚硅氧烷防粘剂

以二端羟基二甲基聚硅氧烷和γ－甲基丙烯酰氧丙基三甲基硅烷为主要原料,合成制备了具有紫外光固化性能的丙烯酸酯聚硅氧烷防粘剂预聚体,以此为基础,配制成了具有较好性能的防粘剂,还对分子质量,稀释剂等因素树防粘性能的影响进行了分析。     

紫外光固化聚硅氧烷防粘剂的新进展

本文介绍了紫外光固化的丙烯酸酯聚硅氧烷防粘剂和环氧聚硅氧烷防粘剂的新进展。     

预聚物对UV固化胶黏剂性能的研究

预聚物作为胶黏剂的主要成膜物质,它的性能基本决定了固化后胶黏剂的主要性能.采用不同类型的丙烯酸酯共混聚合的方法研究了预聚物对紫外光固化胶黏剂性能的影响.主要讨论了预聚物的种类、含量及复配对胶黏剂的固化速率、黏附力及粘接强度的影响.实验发现预聚物的种类和含量是胶黏剂的主要影响因素,脂肪族聚氨酯丙烯酸酯6148J和改性脂肪族聚氨酯丙烯酸酯6079性能较好,且二者比列为3:7,含量为50%时胶黏剂综合性能较好.     

丙烯酸酯预反应体系制备常温无溶剂反应性涂料

利用丙烯酸酯树脂预聚物与交联单体在引发剂和促进剂的作用下进行自由基聚合反应交联成膜,制备了一种低黏度、高固含量、表干时间短、低污染、硬度高、柔韧性好、附着力强、耐候性好的涂料。着重探讨了丙烯酸酯树脂预聚物的合成,并对涂膜性能进行了测试,找到了控制预聚物黏度的方法及涂料的适宜配方,可为丙烯酸类路标涂料的生产应用提供一定的借鉴。     

反应性丙烯酸酯制备常温无溶剂涂料

文章利用丙烯酸酯树脂预聚物与交联单体在引发剂和促进剂的作用下进行自由基聚合反应交联成膜,制备了一种低粘度,高固含量,表干时间短,低污染,硬度高,柔韧性好,附着力强,耐候性好的涂料。文中着重探讨了丙烯酸酯树脂预聚物的合成,并对涂膜性能进行了测试;找到了控制预聚物粘度的方法及涂料的适宜配方;可为丙烯酸类路标涂料的生产应用提供一定的借鉴。     

涂料用含氟丙烯酸酯聚合物的研究和应用进展

总结了含氟丙烯酸酯单体的分类和合成方法，综述了含氟丙烯酸酯的各种聚合方法及含氟丙烯酸酯聚合物在涂料、材料保护、石油开采、皮革、纸张、织物整理、光学材料及防粘涂层等方面应用的最新进展。     

环氧丙烯酸酯预聚物的合成研究进展

综述了环氧丙烯酸酯预聚物的合成与改性。介绍了合成原理,环氧树脂、催化剂、阻聚剂对合成的影响;分别用醇、酸（酸酐）、半酯及聚氨酯4类物质对环氧丙烯酸酯改性,从而得到不同性能的环氧丙烯酸酯预聚物。     

有机硅-丙烯酸酯共聚物防粘剂

华南理工大学科研者将MMA、BA、丙烯酸羟丙酯、八甲基环四硅氧烷、乙烯基硅氧烷等原料,在过硫酸铵引发下,以种子乳液聚合法合成出以聚硅氧烷为核,聚丙烯酸酯为壳的有机硅-丙烯酸酯共聚物,其可做防粘剂。当聚硅氧烷的质量分数在2 0 %～30 %时,该共聚物剥离及粘附力有较好保持率,且隔离效果好。有机硅-丙烯酸酯共聚物防粘剂@王涛     

有机硅-丙烯酸酯共聚物防粘性能的研究

采用种子乳液聚合法制备了有机硅一丙烯酸酯共聚物。以该聚合物乳液作为防粘剂,研究了共聚物中各组分含量对剥离力和剩余粘合力的影响,并以紫外光照射加速老化实验。结果表明,这种有机硅一丙烯酸酯共聚物乳液是一种性能优异的防粘剂。     

水溶性大分子紫外线吸收剂PVAm-g-BP-4的合成研究

合成了一类以2-羟基二苯甲酮为紫外线吸收功能基,以聚乙烯胺(PVAm)为接枝骨架的新型水溶性大分子紫外线吸收剂PVAm-g-BP-4。PVAm-g-BP-4合成分两步,首先将2-羟基-4-甲氧基-5-磺酸基二苯甲酮（BP-4）结构中磺酸基转变为磺酰氯,合成了反应中间体2-羟基-4-甲氧基-5-氯磺酰基二苯甲酮（CBP-4）,采用二氯亚砜为反应溶剂和氯代试剂,N,N-二甲基甲酰胺（DMF）为催化剂,产率达94.5%。然后将CBP-4接枝到聚乙烯胺（PVAm）骨架上,合成PVAm-g-BP-4。目标产物经过TLC、IR、UV分析证明CBP-4已接枝到PVAm上。并优化了催化剂用量、反应温度、时间、溶剂比等反应条件。在棉织物上的初步应用表明,PVAm-BP-4可赋予其良好的紫外线防护功能,而且耐洗牢度优异。     

Synthesis and properties of cationic photopolymerizable hyperbranched polyesters with terminal oxetane groups by the couple-monomer polymerization of carboxylic anhydride with hydroxyl oxetane

The hyperbranched polyesters with terminal oxetane groups were synthesized via couple-monomer methodology based on carboxylic anhydride and hydroxyl oxetane. Two competitive reactions, ring-opening reaction of carboxylic group with oxetane group and esterification of carboxylic group with hydroxyl group, occurred synchronously during the polymerization. The results showed that the hyperbranched polyesters, poly(SA-EHO) and poly(SA-EHPO), were synthesized successfully when succinic anhydride (SA) was selected to react with 3-Ethyl-3-(hydroxymethyl)oxetane (EHO) and 3-ethyl-3-((4-hydroxymethyl)phenoxymethyl)oxetane (EHPO), respectively. The degree of branching was determined to be about 0.7 for poly(SA-EHO) from the ¹H NMR result, which was higher than those reported in literature, indicating that the esterification was dominant. The glass transition temperatures (T_g)s were measured as −11.5 °C for poly(SA-EHO) and 14.3 °C for poly(SA-EHPO) by DSC. The number average molecular weights were 1914 g/mol and 2108 g/mol with the polydispersity indices of 2.39 and 2.28 for poly(SA-EHO) and poly(SA-EHPO), respectively. Both poly(SA-EHO) and poly(SA-EHPO) were added to bisphenol A epoxy resin, EP828, with different contents and cured under UV exposure. From the DMTA and tensile results, the UV cured poly(SA-EHPO) showed higher T_g and tensile strength compared with poly(SA-EHO) because of the existence of phenyl group in poly(SA-EHPO) chain. Moreover, both the T_gs and mechanical strength decreased, whereas the elongation percents at break increased with poly(SA-EHO) and poly(SA-EHPO) increased. This indicates that the flexibility of cured films was improved by the addition of poly(SA-EHO) and poly(SA-EHPO) in the formulations.     

α-呋喃丙烯酸酯类香料的合成及性能研究

通过糠醛与乙酐的Ｐｅｒｋｉｎ反应（１５０℃,７ｈ）,以５８７％的收率合成了α-呋喃丙烯酸,再经酯化反应合成六个α-呋喃丙烯酸烷基酯。该系列酯的香气特征为焦糖样甜香并兼有轻微水果香气,其紫外吸收特性是：λｍａｘ（ＭｅＯＨ）：３０４ｎｍ;摩尔消光系数ε≥２１×１０４Ｌ／ｍｏｌ·ｃｍ;Ｓａｎｄｅｌ灵敏度Ｓ≥７．８×１０－３μｇ／ｃｍ２;可有效吸收ＵＶ Ｂ区域（２８０～３２０ｎｍ）的紫外光。     

水溶性大分子紫外线吸收剂PVAm-g-BP-4的合成

合成了一类以2-羟基二苯甲酮为紫外线吸收功能基,以聚乙烯胺(PVAm)为接枝骨架的新型水溶性大分子紫外线吸收剂PVAm-g-BP-4。PVAm-g-BP-4的合成分两步,首先,将2-羟基-4-甲氧基-5-磺酸基二苯甲酮(BP-4)结构中的磺酸基转变为磺酰氯,合成了反应中间体2-羟基-4-甲氧基-5-氯磺酰基二苯甲酮(CBP-4),采用二氯亚砜为反应溶剂和氯代试剂,N,N-二甲基甲酰胺(DMF)为催化剂,产率达94.5%;然后,将CBP-4接枝到聚乙烯胺(PVAm)骨架上,合成了PVAm-g-BP-4。目标产物经过TLC、IR、UV分析证明,CBP-4已接枝到PVAm上。通过实验优化了催化剂用量、反应温度、反应时间、溶剂体积比等反应条件。在棉织物上的初步应用结果表明,PVAm-BP-4可赋予棉织物良好的紫外线防护功能,而且耐洗牢度优异。     

Epoxy acrylate UV/PU dual‐cured wood coatings

For improving the finishing performances of complicated three‐dimensional coated wood products (e.g., furniture) with some shadow zones in the absence of ultraviolet (UV) light, resulting in incomplete curing of UV coatings, the aim of this study was to investigate the characteristics and effects of curing process on the properties of epoxy acrylate UV/PU dual‐cured resin for wood coatings when compared with traditional UV and polyurethane (PU) coatings. The epoxy acrylate oligomer was synthesized for providing a double bond of acryloyl group and a secondary hydroxyl group. The UV/PU dual‐cured coating was formulated with epoxy acrylate resin/tripropylene glycol diacrylate (TPGDA) monomer by the weight ratio of 80/20, 3% dosage of benzil dimethyl ketal as a photoinitiator, and the NCO/OH mole ratio of 1.0. The aromatic polymeric diphenylmethane diisocyanate was used as a hardener. The films of the dual‐cured coating, obtained from UV‐cured or room temperature‐cured process, showed an excellent tensile strength, elongation at break, impact resistance, and lightfastness when compared with traditional UV and PU coatings; especially, the adhesion of UV/PU dual‐cured coating by UV‐cured process was better than that of traditional UV coating. It can therefore be concluded that the epoxy acrylate oligomer‐based dual‐cured coating could readily be used for complicated wood products finishing. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

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。     

活性稀释剂对有机硅混杂光固化体系感光性能的影响

自由基活性稀释剂TEGDA在含硅聚氨酯丙烯酸酯ISAE与环氧化合物组成的混杂光固化体系中m(TEGDA)∶m(ISAE) =1∶2时 ,体系感度较高 ,感度值可达 2 18 5mJ/cm2 。带有叔胺结构的活性稀释单体NVP的加入不利于提高混杂体系的感度 ,其感度值大于 1980mJ/cm2 。阳离子型活性稀释单体 1,2 ,3 丙三醇缩水甘油醚 (EPON - 812 )和 3,4 环氧基环己基甲酸 3′,4′ 环氧基环己基甲酯 (ERL - 4 2 2 1)组成的混合阳离子稀释剂的使用提高了混杂体系的感度和凝胶率 ,感度值下降至 10 5 6mJ/cm2 。     

Highly branched polyurethane acrylates and their waterborne UV curing coating

A series of UV curable highly branched waterborne polyurethane acrylates (BWPUAs) were synthesized using an “oligomeric A₂ + B₃” approach. The thiol-endcapped difunctional oligomeric A₂ was synthesized first by the addition reaction of isophorone diisocyanate, α,α-dimethylol propionic acid and 2-hydroxyethyl acrylate, then further underwent thiol-Michael reaction with 1,6-hexamethylene bis(thioglycolic acetate). Trimethylolpropane triacrylate was used as a B₃ monomer. The molecular structures were characterized with FT-IR and ¹H NMR spectroscopy. 1,6-Hexanediol diacrylate (HDDA) was incorporated into the polymeric chain for preparing the HDDA-modified BWPUAs (BWPUA-Hs). For the comparison, the linear waterborne polyurethane acrylate (LWPUA) was synthesized. The UV curing kinetics study results by using the photo-DSC approach showed that the BWPUAs possessed higher photopolymerization rate and final unsaturation conversion in the UV cured films compared with the LWPUA, which increased with the increase of unsaturation concentration in BWPUA. Moreover, the photopolymerization performance, and water and solvent resistance properties were greatly enhanced by the incorporation of HDDA segment into the BWPUA chain. The dynamic mechanical thermal analysis results showed that the elastic modulus in the rubbery plateau, and the glass transition temperature of UV cured film increased with increasing unsaturation concentration in BWPUA, whereas decreased with the introduction of HDDA flexible segment. The thermogravimetric analysis confirmed the high thermal stability of UV cured BWPUA films. All UV cured BWPUA and BWPUA-H films showed better flexibility and middle refractive indices due to the thioether linkage in the polymer network.     

紫外光固化水性聚氨酯涂料研究

采用了三步反应合成出水性端烯基聚氨酯并进行紫外光固化 ,研究了聚乙二醇 ( PEG)相对分子质量和聚乙二醇 / 2 ,2 -二羟甲基丙酸摩尔比对合成及其漆膜性能的影响 ,结果表明固化涂层具有优良的硬度、抗冲击强度、附着力和防雾性能     

Synthesis and UV-curing behaviors of novel rapid UV-curable polyorganosilazanes

A novel ultraviolet-curable polyorganosilazane ceramic precursor was synthesized via ammonolysis from modified chorosilane, which had been synthesized by alcoholysis of trichloro(methyl)silane and 2-hydroxyethyl acrylate. The polyorganosilazane was well characterized by using Fourier transformed infrared spectroscopy (FTIR), ¹H nuclear magnetic resonance (¹H NMR), and multi-angle laser light scattering (LLS). Its UV curing behaviors investigated via FTIR and differential scanning calorimeter (DSC) clearly indicated that this polyorganosilazane precursor could be cured rapidly at either air atmosphere or nitrogen atmosphere. The curing reactions take place rapidly within about 15 and 40 s at nitrogen and air atmosphere under UV irradiation, respectively. After exposed under UV light for 40 s at air atmosphere, the conversion percentage of the unsaturated bond of the cured polyorganosilazane sample is near to 90%. The results suggest that incorporating acrylic pendant groups with high UV sensitivity into polyorganosilazane molecular structure is an effective way to increase its curing speed.