The copper plating of the fluororubber (FKM ; fluororubber (vinylidene fluoride- hexafluoropropylene copolymer) has been investigated using 6-(3-triethoxysilylpropylamino)-1,3,5-triazine-2,4-dithiol monosodiumsalt (TES) as a molecular adhesive agent. Corona discharge treatment under different conditions to give an OH group was carried out for FKM surfaces in air, and were treated readily with the TES aqueous solution and ethanol. The FKM treated TES was used to provide a surface-coupled layer of functional molecules, to assist in the adsorption of Pd/Sn catalysts and the subsequent electroless copper plating and electro copper plating. The structure and chemical changes of FKM surfaces were analyzed with the contact angle of water, atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). The surface energy of the FKM was increased by corona discharge treatment times, and the oxygen atom was introduced to the FKM. The amount of TES on FKM surfaces increased with increasing corona discharge treatment times. The FKM treated TES / copper foil adhered products obtained, gave a very high peel strength of 5 kN/m, as well as rubber layer fracture in a peel test.
A special type of coating is required to protect vessels that are permanently submerged in sea water from corrosion and attack from marine organisms. In recent years, new coatings have been developed in their respective fields in order to comply with international regulations. Here we present a coating for water ballast tanks that enables visual judgement of film thickness as well as a low friction and fuel saving type antifouling coating that incorporates hydrogel into the coating film via an innovative technology.
Aluminum alloy materials for building exterior use are mainly coated with organic solvent-based enamel finishes. Many research papers on powder coating for aluminum alloy building materials have recently been published in Japan, due to increased global interest in environmental protection and human and safety. This research has shown that baking polyester powder coatings have a high performance than fluorocarbon powder coatings from the viewpoints of both adhesion and impact resistance. On the other hands, fluorocarbon powder coatings show better durability than polyester powder coatings. In the present paper, we report the application of powder coatings with both high durability and good adhesion from investigations of polyester,fluorocarbon, and mixed polyester/fluorocarbon powder coatings.
JPMA, Japan Paint Manufacturers Association, adopts the major issue of “Environment, Safety and Health” as a main target and voluntarily promotes the introduction of ecological products to the market. The following main themes have been taken up in order to contribute to the market in terms of integrated paint technology and know-how of coating materials and their application with the aim that our created eco-friendly products will provide important benefits for human health and the environment on a global scale. A）Reduction of VOC B）Conservation of natural resources C）Ecological friendliness towards human health and the environment D）Prevention of soil and air pollution Taking this opportunity we will, as an example of saving technology, introduce our experimental testing of high solar reflectance coating in Thailand and then review recent technology in the field of energy saving anti-fouling paints as an example of how paint technologies can reduce greenhouse gas and fuel consumption.
We have studied the synthesis of polysiloxane-acrylic hybrid polymers, and have developed new UV curable inorganic-organic hybrid resins. The evaluation results for the hybrid resins and films indicate that the resins have high weather resistance and dirt shedding property. These properties suggest the possibility that these resins can be applied as surface-protective coatings for exterior use plastic materials, for example building components or automobile parts. In this review, we discuss the properties of new UV curable inorganic-organic hybrid resins and their applications.
Galvanized steel is used as a general term to cover a variety of materials. Each product has been developed to give special properties needed in each field. Typical products include: 1) normal hot dip galvanized steel (GI), 2) galvanealed steel (GA) providing good weldability and press formability, 3) Zn-55％ Al alloy coated steel (GL) providing extremely high corrosion resistance, 4) Zn-low Al content-(Mg) alloy coated steels (GF) with self-sacrificing corrosion protection, 5) electro-galvanized steel providing white and excellent surface appearance. In this paper, the author would like to describe the features of these galvanized steels from the viewpoint of chemical composition and surface properties.
The factors which control dispersion and condensation of silicone in shampoo are explained. The performance and stability of the shampoo are dependent on the type of silicone oil and emulsifier, the emulsification method and the particle size of silicone emulsion. The factors affecting the stability of shampoo, for example, dispersion, creaming, coalescence, are introduced from a physicochemical viewpoint. Moreover, a trigger system using the complex of an anionic surfactant and a cationic polymer which promotes silicone adhesion on the hair is explained. The precipitation behavior of the complex is dependent on the mixing ratio of surfactants or the degree of cationization of cationic polymers. Furthermore, the degree of adhesion of silicone on the hair is dependent on the morphology of complexes which deposit at the time of shampooing.