以水性聚胺酯為基底引入壓克力多元醇及二氧化矽
合成可熱交聯之抗腐蝕塗料

陳竹軒

doi:10.6342/NTU.2013.03033

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以水性聚胺酯為基底引入壓克力多元醇及二氧化矽合成可熱交聯之抗腐蝕塗料

Synthesis of thermal-curable water-borne polyurethane acrylate reinforced with SiO2 and evaluation as anti-corrosion coating

陳竹軒 , Masters　　Advisor：邱文英　　

繁體中文 DOI： 10.6342/NTU.2013.03033

水性聚胺酯；壓克力；抗腐蝕薄膜； water-borne polyurethane ； polyacrylate ； anti-corrosion paint

Abstract │ Reference (73) │ Times Cited (4) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

In this research, two kinds of water-borne polyurethane dispersion which can be applied as an anti-corrosion coating on galvanized steel sheets by thermal treatment have been prepared by adjusting the synthesis process and composition and introducing of polyacrylate. The paints can be divided into two types, the one need additive adding of crosslink agent before using and the one with the ability of self-crosslinking. The are two kinds of crosslinking agents been used in the first type, XL-29SE, a kind of carbodiimide with multi-functional group which has the advantage of fast curing and GPTMS, a kind of silane which can introduce the inorganic SiO2 group into coating. The second type with the ability of self-crossinking is prepared by changing the synthesis process to let SiOH group directly sticked to the surface of the particles.
The first part of my research is about the preparing and introducing into polyurethane system of polyacrylate , and the synthesis of water-borne polyurethane dispersion. By the characterizing of the particle size and zeta potential of the dispersion、the hardness and contact angle of the film to find out the effect of the introducing of polyacrylate.
In the second part of my research, two kinds of crosslinking agents were added into the WPU forming two different one-part paints. In XL-29SE series , the film was forming by the fast crosslink reaction of diimide group and carboxylic group, another end in GPTMS series the film was forming by two-stage thermo treating including low
V
temperature sol-gel reaction to form a unit with epoxy group on both end which indeed the crosslinkable part, and high temperature ring-opening crosslink reaction.
In the second section of this research, we develop new liquid coatings mixed by two various crosslink agents with WPU. XL-29SE, which can reduce the time for film formation, reacts with hydrophilic functional group via diimide group. By contrast, GPTMS, via silanol group, undertakes sol-gel reaction in low temperature and forms epoxy groups at both ends. The epoxy groups can serve as a crosslinker in high temperature by an ring-opening reaction. Therefore, we compare the characteristic (e.g., thermal property, hardness, contact angle, and protective ability) of thin films from two different mechanisms to demonstrate the effect of two crosslinkers, and discuss the possibility of the addition of inorganic part by small molecular crosslinker(i.e., SiO2) in polymer coating.
In the third section, we use excess NCO group to form the pre-polymer, after the emulsion process we add a kind silane with primary amine group in one end to react with the remained NCO group, forming a particle with silanol group on the surface. After the synthesis of the paint, we form thin films through two steps, sol-gel in low temperature and dry in high temperature. We test the characteristic of thin films and compare these two inorganic methods mentioned in the second section.

Reference ( 73 ) 〈TOP〉

1. Al-Salah, H.A., et al., Polyurethane cationomers. I. Structure–properties relationships. Journal of Polymer Science Part A: Polymer Chemistry, 1988. 26(6): p. 1609-1620.
連結：
2. Egboh, S.H.O., Grafting Vinyl Monomers onto Unsaturated Segmented Polyurethanes. 1. Graft Copolymerization of Acrylamide, Methacrylonitrile, and Methyl Methacrylate. Journal of Macromolecular Science: Part A - Chemistry, 1983. 19(7): p. 1041-1048.
連結：
6. Dieterich, D., Aqueous emulsions, dispersions and solutions of polyurethanes; synthesis and properties. Progress in Organic Coatings, 1981. 9(3): p. 281-340.
連結：
7. Hirose, M., J. Zhou, and K. Nagai, The structure and properties of acrylic-polyurethane hybrid emulsions. Progress in Organic Coatings, 2000. 38(1): p. 27-34.
連結：
8. Chen, G.-N. and K.-N. Chen, Self-curing behaviors of single pack aqueous-based polyurethane system. Journal of Applied Polymer Science, 1997. 63(12): p. 1609-1623.
連結：

Times Cited (4) 〈TOP〉

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