Journal of the Japan Society of Colour Material

A Study of Surface Modification of Stainless Steels (III)

Improvement of adhesion durability of stainless steels in wet environments by surface treatment with silane coupling agents

Hidetoshi YAMABE, SUSUMU AMANO, Toshiaki FUJIWARA

1997 Volume 70 Issue 12 Pages 763-771
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.763

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The surface treatment of stainless steel with silane coupling agents was investigated. Surface treatment with γ-glycidoxypropyltrimethoxy silane (GPS) remarkably improved the adhesion durability of stainless steel in wet environments. The improvement resulting from surface treatment with γ-aminopropyltrimethoxy silane (APS) was however not so great.
XPS results gave strong evidence of protonated amino groups of APS which hinder the formation of polysiloxane structures at the stainless steel / APS interface. However, XPS and, μ-AES results indicated thick polysiloxane structures at the interface, which can improve the adhesion durability in wet environments. From these results the difference between GPS and APS as promoters of the adhesion durability of stainless steel could be explained.

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The Film Properties of Thermally Cured Coatings of Poly (oxyvinyl-1, 2-cyclohexylene) /Poly (hydrogensiloxane) by Hydrosilylation

Hiroharu OHSUGI, Nobuo IGA

1997 Volume 70 Issue 12 Pages 772-778
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.772

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The organic-inorganic hybrid polymer network was obtained by platinum-catalyzed hydrosilylation, as a thermally crosslinking reaction, of poly (oxyvinyl-1, 2- cyclohexylene) (POVCH) / poly (phenylmethylhydrogensiloxane) (PMHS). From the ²⁹Si-NMR analysis of the product as a model reaction of POVCH/PMHS, hydrosilylation was found to occur selectively. The thermally cured films of POVCH/PMHS had glass transition temperatures in the range of 106 to 118°C and showed excellent alkali resistance (0.1 mol/1 KOH ethyl alcohol solution). Compatibility between POVCH and PMHS was excellent. From XPS measurement, the cured films were found to be uniform in composition. The gloss of the cured film of POVCH/PMHS remained stable after the fluorescent UV-condensation cycle test for as long as 2000h. Outdoor exposure was carried out on two kinds of coatings of POVCH/PMHS and acrylic/melamine for three years in Neyagawa. It was found that color change (_??_E) of the unwashed panel of POVCH/ PMHS was 1.2, whereas that of the unwashed panel of acrylic/melamine was 12.0.

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A New Method for the Measurement of Internal Stress in Coatings

Yoshinori HOSHINO

1997 Volume 70 Issue 12 Pages 779-783
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.779

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Internal stress in organic coatings has been commonly measured by the bending beam technique. In this study, a new method for the measurement of internal stress, TFD (thin foil deflection) method is proposed. In a strip of coated thin aluminium foil, the deflection appeared sidways. The TFD method derived internal stress from the deflection. The coated thin foil can be considered as a bimetallic strip. The deformation of the common surface occurs in such a manner that foil layer is compressed and coatings layer is extended. The calculation of internal stress was based on the equilibrium of the bending moment in the cross section. Using the TFD method, internal stresses in epoxy-phenolic coatings were measured under various thermosetting temperatures. Internal stress values obtained by the TFD method agreed closely with those obtained by FSB (free film stretch back) method.

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Evaluation method of coating film degradation using chemical luminescence

Takeyuki TANAKA

1997 Volume 70 Issue 12 Pages 784-787
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.784

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The Present Situation in Development of Tinfree Hydrolizable Antifouling Paints

Shigeru MASUOKA

1997 Volume 70 Issue 12 Pages 788-796
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.788

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Degradation and Stabilization of Color Photographic Dyes

Masakazu MORIGAKI

1997 Volume 70 Issue 12 Pages 797-807
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.797

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Durable Oriental Lacquer (Urushi) -A self-surface renewable coating through effloresence in degradation of the core-shell type microgel densely packed lacquer

Ju KUMANOTANI

1997 Volume 70 Issue 12 Pages 808-819
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.808

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Effect of Metallic Salts on Coloring and Photofading of Azo Dyes for Imaging Materials

Kieko HARADA, Kazuyuki SUGITA

1997 Volume 70 Issue 12 Pages 820-829
Published: December 20, 1997
Released on J-STAGE: November 20, 2012

DOIhttps://doi.org/10.4011/shikizai1937.70.820

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