聚酯树脂及其涂料

不含苯乙烯的可固化聚酯涂料和汽车车身填料；聚酯水分散体的合成研究；     

聚酯树脂及其涂料

固化的聚酯-聚丙烯酸酯树脂：EP1 428 845[欧洲专利申请，德]，德国：Degussa AG(Gloeekner,Patrick等)，固化的聚酯一聚丙烯酸酯树脂：EP1 428 846[欧洲专利公开，德]／德国：Degussa AG(Gloeckner,Patrick等)．硅烷改性聚酯、该聚合物的制备和涂料组合物：JP2004—211 000[日本专利公开]／日本：Arakawa Chemical Industries，Ltd．(Ito，Atsushi等)．含接枝共聚物的涂料组合物及食品罐头的涂装：US2004—132 895[美国专利申请公开]／美国：(Ambrose，Ronald R．等)．     

聚酯树脂和粉末涂料

概括了粉末涂料的优点,技术发展趋势,交联剂的类型、以聚酯树脂以及单体对树脂和涂层性能的影响。     

环氧树脂涂层表面亲水性对微藻黏附性能的影响

在固体材料表面黏附成膜是微藻细胞的一种生理特性。近些年基于微藻生物膜的生物过程,如生物膜贴壁培养和防附着技术受到了很多关注。微藻在固体材料表面的黏附受藻细胞与材料表面之间的相互作用的影响,建立黏附强度与材料表面性质参数间的关系对于通过材料选择来强化或控制微藻生物膜具有非常重要的意义。本工作的目的是揭示和明确材料亲疏水性对微藻黏附的影响,提出了一种双酚A环氧(EP)树脂表面亲疏水改性的方法。通过将亲水性的二乙醇胺(DEA)或疏水性的聚甲基聚硅氧烷(PMHS)加入到EP树脂中反应,EP树脂表面水接触角在36.80?~98.34?范围内可通过加入不同量的DEA或PMHS实现任意可调,材料的表面水接触角与DEA或PMHS加入量之间有线性关系。重要的是这种改性方法获得的材料,其形貌、结构、表面粗糙度等表面性质几乎没有变化,从而在研究和关联微藻黏附量与材料表面亲疏水性(表面水接触角)之间的关系时可以排除亲疏水性之外的其他表面性质的影响;其次,考察了小球藻和栅藻在不同亲疏水性材料表面的黏附行为,结果表明小球藻和栅藻在亲水性和疏水性材料表面均能黏附成膜,但在亲水性材料表面黏附更多更快;建立了微藻最大黏附容量与材料表面接触角之间关联关系,表明微藻最大黏附容量随材料表面水接触角的增大而线性降低,栅藻的表面黏附容量比小球藻大。     

水基环氧树脂乳液及其胶粘剂

概述了环氧树脂乳液的发展及制造方法;介绍了以环氧树脂乳液为基础的胶粘剂配方及基本性能;重点讨论了单组分环氧乳液作为胶粘剂在建筑领域的应用。     

环氧树脂涂层的耐冲蚀磨损性能

配制了3种环氧树脂涂层配方,测试其耐冲蚀磨损性能。结果发现,以纳米蒙脱土为填料、203#聚酰胺为固化剂的环氧树脂涂层的耐冲蚀磨损性能最佳:随着磨料粒度、磨料质量分数、试验机主轴转速的增大,冲蚀磨损率增加,攻角为45°时冲蚀磨损率最大,60°时最小;推荐最佳耐磨涂层的配方为:w(环氧树脂E-44):w(环氧树脂E一51):w(203#聚酰胺):w(纳米蒙脱土)为30:70:80:7。     

单组分环氧树脂胶粘剂用潜伏性固化剂

对单组分环氧树脂胶粘剂用潜伏性固化荆的研发进展进行了扼要的综述.     

热熔压敏胶的粘接性能和流变行为的关系

研究了热熔压敏胶初粘性、剥离强度与流变学行为之间的关系。研究发现,用温度扫描方法得到的流变曲线与压敏胶主曲线较为一致,因此可以将其转化为不同弛豫时间下的流变行为。通过调整液体树脂含量,设计出一系列橡胶平台模量保持相对不变的同时,具有不同玻璃化温度的压敏胶配方,其中玻璃化温度相同的压敏胶配方,具有基本相同的环形初粘力和剥离强度。     

Model epoxy powder coatings and their adhesion to steel

Model epoxy powder coatings differing in crosslink density were applied to steel. Their adhesion loss upon immersion in water at 35 and 55°C, as well as recovery of the adhesion upon drying were determined. Permeability of free films to gaseous water and oxygen were measured. Impedance measurements were used to study the diffusion characteristics of water into the coatings on steel. The permeability data of the formulations were similar. However, the adhesion behavior was very different. The adhesion in the dry state proved highly dependent on the rheology during the cure process. The adhesion recovery after immersion was apparently determined by the effectiveness of water as a plasticiser in the polymer network.     

Development of high performance,waterborne coatings. Part I: Emulsification of epoxy resin

A new manufacturing process of high performance, waterborne coatings for can coating applications is developed, which includes emulsification of an epoxy resin with or without its hardener by incorporation of an acrylic resin. It becomes possible by this new process to emulsify a variety of resins with minimum effects of the surfactant acrylic resin. Thus, latitude to design formulations is widened and the performance of epoxy resin and its hardener can be fully developed.     

紫外光固化环氧丙烯酸树脂导电胶

以环氧丙烯酸树脂为基体树脂、微米级片状铜粉为导电填料制备紫外光固化导电胶,采用光引发剂与热引发剂复合引发体系实现导电胶的深层固化。对紫外光固化导电胶的影响因素进行研究,制备出的导电胶电阻率可达1.3×10-3Ωcm,剪切强度为1.3MPa。     

环氧胶粘剂耐热性的研究进展

介绍了耐热环氧胶粘剂的主要性能特点,论述了近年来在提高环氧胶粘剂耐热性方面所采用的方法,同时指出了耐热环氧胶粘剂的研究发展方向.     

单组分环氧胶粘剂的研究现状

综述了单组分环氧树脂胶粘剂的研究现状,并对单组分环氧胶发展趋势进行了展望。     

环氧树脂胶粘剂的耐热改性研究进展

介绍和评述了环氧树脂胶粘剂耐热和增韧改性的若干体系,如高官能度环氧、环氧-酚醛、环氧-丁腈、环氧-芳胺、环氧-芳胺-双亚胺、环氧-链烯基酚-双亚胺、环氧-双羟、羧亚胺、环氧-聚酰亚胺和环氧-氰酸酯等的研究和应用情况。     

Sulfonation of polymer surfaces - I. Improving adhesion of polypropylene and polystyrene to epoxy adhesives via gas phase sulfonation

A new method for surface treating polymers and polymer composites based on gas phase sulfonation has been shown to quickly and effectively increase wettability and adhesion to epoxy. A gas mixture containing a low concentration of sulfur trioxide in nitrogen (～ 1% v/v) was used to treat the surfaces of polypropylene and polystyrene films. The sulfonated surfaces were then neutralized with ammonium hydroxide. The effectiveness of sulfonation on the adhesion of these polymers to an epoxy adhesive was investigated using mechanical testing of sandwich lap-shear specimens. The lap-shear adhesive joint strength of epoxy to sulfonated polypropylene was compared with polypropylene treated with currently accepted surface treatments including chromic acid etching and flame treatment. Sulfonation greatly improves the adhesion of polypropylene to epoxy compared with other surface treatment techniques as measured by lap-shear strength. An optimum sulfonation treatment level was shown to exist for polypropylene. For polystyrene surfaces, it was shown that while sulfonation immediately increased wettability, it did not greatly improve its adhesion to epoxy; it did, however, significantly reduce the scatter in the ultimate strength values. Excess sulfonation treatment reduced the lap-shear strength for both polymers. X-ray photoelectron spectroscopic examination of the locus of failure of tested joints has shown that failure occurs in a weak boundary layer for these surface-treated polymers.     

Development of high performance,waterborne coatings. Part II: Factors affecting adhesion performance

A new manufacturing process for high performance, waterborne coatings for can coating application was developed, which includes emulsification of an epoxy resin with or without a hardener by incorporation of an acrylic resin. It is possible by this new process to emulsify a variety of resins with minimum effects of the surfactant. (acrylic resin). The effects of surfactant and neutralizer on adhesion performance were studied. It was found that the effects of the acrylic resin amount were relatively small, and that the effects of the neutralizer were significant. It was confirmed that the usage of ammonia or amines with a branched alkyl group is required to achieve balanced dry and wet adhesion.     

CTBN增韧环氧树脂胶粘剂工艺条件的研究

为改善环氧固化物的韧性,采用液态端羧基丁腈橡胶(CTBN)增韧环氧树脂制成含CTBN嵌段的环氧树脂预聚物,再加入其他助剂及固化剂制备环氧胶。实验表明,CTBN增韧E-51的最佳反应条件为:温度(125±1)℃、催化剂三苯基瞵(TPP)0.2%、反应时间80 min。在此条件下,CTBN用量每增加5%,反应时间延长约20min。