nyenaceyg
Dołączył: 13 Gru 2010
Posty: 522
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Skąd: England
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 Wysłany: Pią 17:10, 31 Gru 2010 Temat postu: Sheet (T) Gold Development _170 Putty |
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Sheet (together) the development of gold Putty
0, 47, of Shanghai when the coating, showing a high exothermic peak, the volume shrinkage rate is high, curing high surface hardness, impact resistance and poor shortcomings, and because the role of oxygen inhibition, poor air-drying, the surface tacky. Unsaturated polyester resin using 9125R,[link widoczny dla zalogowanych], a fundamental solution to this problem, it used to sheet (B) gold putty, not only fast-curing, the volume shrinkage rate is small, and the performance is excellent, showing impact resistance, heat resistance, good flexibility, adhesion and other characteristics. The use of silane coupling agent, to improve the sheet (B) of gold alloy substrate or primer Putty and the adhesion of the interface play an active role. Its mechanism are: sheet (together) after gold coating putty, a small amount of silane coupling interface material migration in the end, in addition to hydrogen bonds or reduced synthesis of a covalent SiO-M (M for the substrate),[link widoczny dla zalogowanych], the silane of the intermolecular condensation between silanol and network structure of the membrane Qiju Cheng covering the substrate surface, the bond energy is much larger than the van der Waals attraction of the interface force produced, and showing a good adhesion to the substrate interface. For example, the surface of the dense alumina aluminum film,[link widoczny dla zalogowanych], silane coupling agent to form hydrogen bonds with the addition of alumina, but also the formation of covalent bonds an A1-0 a Si one; of copper or copper alloy surface, coupling agent and copper covalent bond formation of a Cu-O-Si one, which formed between the chelate structure of the alloy substrate as a strong adhesion of the base surface. In addition, primer interface, sheet (B) Gold putty and coating (for example, electrophoresis paint) with the role of anchor - adhesion, mainly due to the junction of layers of paint and lacquer-based resin silane active organic groups reaction to form chemical bonds with the firm, and formed a mutual penetration of the network structure. In short, the silane coupling agents as adhesion promoters to enhance the sheet (B) of gold alloy substrate and the primer Putty and the adhesion between layers to improve the matching between the coating performance. In addition, the silane coupling agent on the sheet (T) Gold putty in the surface modification of pigments and fillers to make it pro-oil hydrophobic, easily wet matrix resin dispersion and a decrease in viscosity and increase the amount of filler added to prevent precipitation from to good effect. Hollow borosilicate glass beads for the rigid structure of the hollow sphere, its impact and internally generated stress has a good dispersion. For the sheet (T) Gold putty, can rise to a number of independent adiabatic micro-cavity, due to the role of silane coupling agent to improve its compatibility with the resin, well improved impact resistance and compressive strength , but will also reduce the stress due to thermal expansion and contraction, reducing the volume shrinkage, improved temperature performance. In addition, compared to the same quality of the inorganic filler, hollow glass beads with a larger volume, adding 5% (mass fraction) can make the finished product volume increased 25% to 30%, thereby reducing the cost per unit volume of coating 3 Conclusion (1) Compared with the general purpose putty,[link widoczny dla zalogowanych], sheet (together) against the use of gold Putty basic environmental conditions (temperature, humidity) of the product a long shelf life at room temperature, in the use of fast curing,[link widoczny dla zalogowanych], and excellent with the alloy substrate focus, good temperature resistance, and its increasingly wide range of applications. (2) of the main raw material - 9125R Special unsaturated polyester resin and its supporting localization of the preferred support materials, to ensure product quality, reduce production costs has played a positive role in promoting.
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