水性环氧酯防锈底漆

概述了以无乳化剂环氧酯乳液为基料的水性环氧酯防锈底漆乳液的合成、制漆配方及技术性能等特点.     

Durability studies of aluminium/ aluminium joints bonded by chlorobutyl rubber-carboxylated nitrile rubber and epichlorohydrin rubber-carboxylated nitrile rubber blends

Two novel rubber blends based on chlorobutyl rubber ( )-carboxylate nitrile rubber ( ) and epichlorohydrin rubber (ECO)-carboxylated nitrile rubber ( ) can be used as adhesives for aluminium/aluminium bonding. Incorporation of silica filler in the blend and carbon black in the blend improves joint strength. The adhesives show remarkable water and salt water resistance. The adhesives based on show remarkable heat and water resistance. Heat stability of the adhesives based on is not satisfactory but can be improved by the application of silane primer on the aluminium surface. Silane primer also improves the paraffin oil resistance. The increase in joint strength resulting from the application of silane primer is due to the formation of Si-O-Al linkages at the aluminium/primer interface.     

Adherence of Liquid Crystalline TDI-Polyurethanes to Steel

Linear liquid crystalline polyurethane (LC-PU) were synthesized by the reaction of 2,4-toluene diisocyanate (TDI), 4,4'-bis-(6-hydroxyhexoxy)biphenyl (BHHBP), and poly(butylene adipate) (PBA). The BHHBP as mesogenic unit was incorporated into the hard segment formed by the reaction with the TDI. The hard segments are incompatible with the PBA soft segments. The mesomorphic behaviour is influenced by both the soft segment length and the hard segment concentration.

The adhesion of such polyurethanes used as primer in composites based on steel as substrate and alkyd melamine resin as coating is dependent on the polyurethane structure, the thickness of the polyurethane layer and its drying conditions. The highest wet adhesion stability is achieved by the hard-segment-type polyurethane composed of TDI and the mesogenic unity BHHBP. Partial substitution of BHHBP by 2,2-bis-(hydroxymethyl)propionic acid (BHMPA) in this LC polyurethane enhances the effectiveness of the primer.     

水性防锈乳胶漆的研制

介绍了水性防锈乳胶底漆和中间漆的配方、生产工艺及性能指标。     

有限元仿真在枪械击发中的应用

击针在打击底火时必须具有一定的能量才能可靠地打燃底火。对于同一种枪弹而言,在不同的击发条件下,击发所需的能量也是不同的。以某枪为例,应用大型有限元分析软件对它的击发过程进行动态仿真,从而得出此枪可靠击发时击针需要具有的能量和速度,为自动武器的击发机构设计和改进提供了理论依据。     

浅谈3C1B涂装技术在塑料件涂装中的应用

3C1B涂装技术指底漆、色漆和罩光清漆三涂层湿态连续涂装后一起进行烘干的涂装方式。介绍此方式应用于塑料件涂装的技术难点和解决方法     

航空涂料及其今后发展

略述了国内外航空涂料的现状及我国的市场概貌,并用实例勾勒出其今后技术发展的趋向。     

利用造纸废液中塔尔油制备工业底漆的研究

研究用简单分离工艺从造纸废液中分离塔尔油制备工业底漆的新工艺。使用造纸废液中塔尔油，经减压精馏纯化，适当加入复合添加剂，制得优质醇酸树脂，从而制备出性能较好的工业底漆。研究发现底漆涂膜的机械性能和外观由改性醇酸树脂的配比、酯化温度以及工业底漆配比所决定。采用石油树脂改性醇酸树脂所得工业底漆外观平整光滑，表干时间6min，实干时间10h，经24h耐水性试验，无变化。结果表明，新工艺制备的工业底漆性能良好，废液分离工艺简单，具有良好的经济效益与环保效益。     

PE木器底漆常见问题及对策

针对PE底漆在运用过程中出现的弊病,探讨了PE底漆的冬季打磨、调油防沉、加白水后消泡和填充性能。另外将着重对PE清底漆的抗下陷性进行探讨,并给出了相应的解决方案。     

The Mechanism for 3-Aminopropyltriethoxysilane to Strengthen the Interface of Polycarbonate Substrates with Hybrid Organic–Inorganic Sol-Gel Coatings

An aminolysis mechanism is proposed to explain the enhanced adhesion between the interface of a bisphenol-A polycarbonate substrate with an alkoxysilane containing sol-gel coating when 3-aminopropyltriethoxysilane (3-APS) is used as a primer. Both a model solution study and surface analyses of polycarbonate substrates exposed to 3-APS indicate that the latter reacts with the carbonate groups in the polycarbonate chain by forming urethane linkages. With 3-APS bonded to the substrate, a sol-gel coating can be chemically bonded to the substrate through hydrolysis of alkoxysilane groups and subsequent silanol condensation. Consequently, enhanced adhesion between the sol-gel coating and the substrate is achieved.