Study of a Naturally Drying Lacquer Hybridized with Organic Silane

Abstract

ABSTRACT:An organic-inorganic hybrid condensate formed by the reaction of lacquer sap and organic functional silane was examined to develop a naturally drying lacquer. The hydroxyl group of urushiol contained in the lacquer sap underwent alcoholysis reaction with the organic functional silane and generated a high molecular weight polymer of polysiloxane. The natural drying process of the hybrid lacquer film is a hydrolysis reaction. In addition, the activities of the alkoxy groups in the organic functional silane showed that the methoxy activity was higher than ethoxy, and trimethoxy activity was higher than dimethoxy. The amino residues in organic functional silane react with the cathechol ring of urushiol, and then the hybrid oxidizes to a dark color. However, there is a tendency for the ring-opening reduction of an epoxy group to produce a light color due to the coexistence of epoxy silane.

Preparation and characterization of a new lacquer based on blending urushiol with thitsiol

“…Previously, we developed a series of fast-drying lacquers using kurome, 2 hybridized, [3][4][5] and blended methods. 6 Using these techniques to improve the slow drying time of thitsiol, in this study, we tried blending urushiol with thitsiol to make a new blended lacquer.…”

Effects of lacquer polysaccharides, glycoproteins and isoenzymes on the activity of free and immobilised laccase from Rhus vernicifera

“…1). All of these components have been separated and purified [1,5] and some of the components have been studied individually, such as the structural analysis of urushiols and laccols [6][7][8][9][10][11]; lacquer polysaccharides [4,[12][13][14]; fast drying lacquer [15][16][17][18][19], and the morphology and components of lacquer film [20][21][22][23], however, their interactions have been scarcely investigated due to their complexity [24]. Some interesting phenomena have been observed, for example lacquer polysaccharides in the surface of the lacquer film act as a barrier layer against oxygen diffusion [25].…”

Synthesis of Rhus succedanea lacquer film and analysis by pyrolysis-gas chromatography/mass spectrometry

“…In spite of progress in lacquer chemistry, the mechanism of laccase catalysis is unclear; it is, at most, limited to dimerization due to the complex nature of lacquer sap and lack of an effective measuring method [10][11][12]. In order to fully understand the film-making mechanism of natural lacquer film, the synthesis of a sole component and then breaking down of the steps of natural film-making is necessary.…”