聚酯树脂
聚酯树脂一般分为饱和聚酯树脂和不饱和聚酯树脂。
一．饱和聚酯树脂
1. 定义
饱和聚酯树脂是单纯由饱和多元酸和饱和多元醇缩合而成的树脂。
2. 反应原理
聚酯树脂在生产上一般由二元酸和二元醇进行酯化反应。原料一般有：己二醇、新戊二醇，三羟甲基丙烷，间苯二甲酸，己二酸等。
3. 固化
聚酯树脂常用的固化剂有：氨基树脂，异氰酸酯，环氧树脂。
氨基树脂（脲醛树脂、三聚氰胺甲醛树脂）。用量为聚酯树脂的25-30%。用脲醛固化的树脂，固化速度快，涂膜的机械性能好；用三聚氰胺固化的树脂，涂膜的耐候性好，适合于作面漆。
异氰酸酯。常用的有甲苯二异氰酸酯(TDI)、六亚甲基二异氰酸酯(HDI)、异佛尔酮二异氰酸酯(IPDI)。用量聚酯/异氰酸酯在1.05：1—1.3：1。涂膜硬而有柔韧性、耐化学品、耐磨。
环氧树脂。涂膜附着力强、耐蚀性好。多用于制作粉末涂料。
4. 应用
聚酯树脂漆多用于汽车涂料、工业防腐涂料、包装涂料、家具涂料以及印刷油墨。
Compound containing the functional group -N=C=O, attached to an organic radical or hydrogen. Isocyanates are crosslinked with hydroxyls to form polyurethanes.
Several types of isocyanate monomers exist:
HDI : hexamethylene diisocyanate 
IPDI : isophorone diisocyanate (cycloaliphatic) 
MDI : diphenylmethane diisocyanate 
TDI : toluene diisocyanate 
TMDI : trimethylhexamethylene diisocyanate
Aliphatic isocyanates offer notable chemical resistance, color and gloss retention. They provides excellent resistance to weathering and ultra-violet degradation.
Aromatic isocyanates are used for interior applications that require excellent chemical and abrasion resistance. On exterior exposure they chalk and yellow. They are formulated primarily for primers and intermediate coats, as well as top coats.
1、折射率 当光从一种介质射入另一种介质时，有时会因速度发生变化而改变方向，这种现象叫做折射，当光从真空射入某一种介质而发生折射时，入射角和折射角的正弦的比值叫做折射率，折射率又称光指数。 白度; 白度是表示物质对可见光吸收与反射两部分之比，相对白度是波长和粒度的函数。白度综合了白色颜料的亮度与色调两种光学效果。
2、遮盖力 遮盖力是指当一件物体涂以某种涂料时，涂料中的颜料能遮盖被涂物体表面的底色，使这底色不能再透过涂料而显露出来的能力。 颜料质量（g） 遮盖力=颜料质量（g）/ 被涂物体表面积（cm2） 颜料的遮盖力越大，则这个数值越小。遮盖力也可以用每克颜料能遮盖被涂物体的表面积来表示，就是上一种表示方法的倒数。这种方法表示的颜料遮盖力越大，则其数值便越大，涂膜便可以越薄，所需的涂料量便越小。
Z (Impedance) – Variable for Electrical Impedance (The opposition a circuit offers to the flow of alternating current) expressed in ohms
Yield – The percent of usable, defect-free lumber that can be cut from a rough cutting, board, or bundle of lumber.
Yield value – The stress (either normal or shear) at which a marked increase in deformation occurs without an increase in load.
X (Reactance) – Variable for Electrical Reactance (Opposition to the flow of alternating current).
Warp – A significant variation from the original, true, or plane surface.
Watt – A unit of electric power. The product of a volt times an ampere.
Webbing – Filaments or threads that may form when adhesive transfer surfaces are separated.
Wood failure – The rupturing of wood fibers in strength tests on bonded specimens, usually expressed as the percentage of the total area involved which shows such failure.
Wood Welder – Small hand-held radio frequency unit generally used for assembly gluing.
Wood, built-up laminated – An assembly made by joining layers of lumber with mechanical fastenings so that the grain of all laminations is essentially parallel.
Working life – The period of time during which an adhesive, after mixing with catalyst, solvent, or other compounding ingredients, remains suitable for use.
V-joint – A glue joint in which one side is thicker than the other as a result of poor machining or uneven application of pressure.
Vacuum Press – A press designed for laminating or veneering in which the panel is placed inside of a flexible bag connected to a vacuum pump.
Vapor Density – The weight of a vapor or gas compared to the weight of an equal volume of air.
Vapor Pressure – The pressure exerted by a saturated vapor above its own liquid in a closed container.
Vehicle – The liquid component of a material.
Veneer – A thin (usually less that 1/8" thick) piece of wood.
Ultimate elongation – Elongation at failure.
Ultraviolet light – Part of the light spectrum. Ultraviolet rays can cause chemical changes in rubbery materials.
Urethane – A family of polymers ranging from rubbery to brittle. Usually formed by the reaction of a di-isocynate with a hydroxyl.
UV – Ultraviolet Light.
Tack – The property of an adhesive that enables it to form a bond of measurable strength immediately after adhesive and substrate are brought into contact under low pressure. Same as aggressive tack.
Tack range – The period of time in which an adhesive will remain in the tacky-dry condition after application to a substrate, under specified conditions of temperature and humidity.
Tack, dry – The property of certain adhesives, particularly nonvulcanizing rubber adhesives, to adhere on contact to themselves at a stage in the evaporation of volatile constituents, even though they seem to dry to the touch.
Tackiness – The stickiness of the surface of a sealant or adhesive.
Tangential Grain – Grain orientation in wood in which annual rings are approximately parallel to the wide surface. Also called Flat or Plain Sawn.
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