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    • 21. 发明申请
    • Electrosterically stabilized aqueous polyurethane resins, method for the production thereof, and use thereof
    • US20060205869A1
    • 2006-09-14
    • US10551526
    • 2004-04-01
    • Norbert SteidlAlois MaierFranz WolferstetterChristian HuberSascha Raspl
    • Norbert SteidlAlois MaierFranz WolferstetterChristian HuberSascha Raspl
    • C08G18/08
    • C08G18/12C08G18/0823C08G18/283C08G18/3275C08G18/4854C08G18/6692C09D175/04C08G18/50
    • A description is given of electrosterically stabilized polyurethane resins having an improved profile of properties, obtainable by a) preparing a hydrophilic and solvent-free macromonomer (A)(ii) with monomodal molecular mass distribution, by a1)reacting 50 to 100 parts by weight of a hydrophilic alkyl- or arylpolyalkylene glycol (A)(i) with 1 to 100 parts by weight of a polyisocyanate component (B)(i) optionally in the presence of a catalyst in the absence of solvents, and subsequently a2) reacting the uniform preadduct from stage a1) completely with 0.5 to 200 parts by weight of a compound (C) in the absence of solvents, and b) by preparing the polyurethane dispersion, by b1)reacting 2 to 50 parts by weight of the hydrophilic and solvent-free macromonomer (A)(ii) with 25 to 250 parts by weight of the polyisocyanate component (B)(i), optionally in the presence of 0 to 50 parts by weight of a solvent component (D) and also of a catalyst, b2) reacting the polyurethane preadduct from stage b1) with 50 to 100 parts by weight of a polymeric polyol (A)(iii) and optionally with 0.5 to 10 parts by weight of a low molecular mass polyol component (A)(iv), optionally in the presence of a catalyst, b3)reacting the homogeneous polyurethane preadduct from stage b2) with 2 to 20 parts by weight of a polyol component (A)(v), optionally in the presence of a catalyst, b4) admixing the homogeneous polyurethane prepolymer from stage b3), before or during dispersion in 50 to 1500 parts by weight of water, with 2 to 20 parts by weight of a neutralizing component (E), b5)dispersing the optionally (partially) neutralized polyurethane prepolymer from stage b4) in 50 to 1500 parts by weight of water, which optionally further contains 0 to 100 parts by weight of a formulating component (F), and finally b6)reacting the (partially) neutralized polyurethane prepolymer dispersion from stage b5) with 3 to 60 parts by weight of a chain extender component (G) and also, subsequently or simultaneously, with 0 to 30 parts by weight of a chain stopper component (H). The performance properties of the polyurethane dispersions of the invention in terms of absence of solvent, and also material properties, are excellent. Also deserving of emphasis are the simplicity and reproducibility of the process and the storage stability of the products.
    • 26. 发明授权
    • Solvent-free polyurethane dispersion
    • 无溶剂的聚氨酯分散体
    • US06635723B1
    • 2003-10-21
    • US09623649
    • 2000-10-30
    • Alois MaierFranz WolfertstetterHerbert WinkelmannJosef WeichmannAlfred Kern
    • Alois MaierFranz WolfertstetterHerbert WinkelmannJosef WeichmannAlfred Kern
    • C08J300
    • C09K3/1021C03C17/322C04B41/4884C08G18/0823C08G18/12C08G18/44C08G18/4854C08G18/6659C08G18/6692C09D175/08C08G18/3228C08G18/2865
    • A description is given of a solvent-free polyurethane dispersion having a high solids content of polyurethane polymer or fillers, which is obtainable by a) allowing a relatively high molecular weight polyol component (A) (i) and, if desired, a low molecular weight polyol component (A) (ii) to react with a polyisocyanate component (B) in the presence or absence of a catalyst to give a polyurethane preadduct, then b) reacting the polyurethane preadduct from step a) with a low molecular weight and anionically modifiable polyol component (A) (iii) containing two or more hydroxyl groups and one or more carboxyl groups to give the corresponding prepolymer, c) allowing the prepolymer from step b) to react with a neutralization component (C) until the carboxyl groups have been completely or partially neutralized, subsequently or simultaneously d) dispersing the neutralized prepolymer from step c) in water which may further comprise a formulation component (F) comprising fillers, pigments, plasticizers, fibrous materials and other customary additives, subsequently e) reacting the dispersion from step d) with a chain extension component (D), and f) if desired, allowing the dispersion from step e) to react with a chain stopper component (E). The polyurethane dispersion of the invention has an ideal linear segmented structure due to its method of preparation and has extraordinarily high solids contents combined with comparatively low viscosities, complete freedom from solvents, excellent materials properties (e.g. elasticity, elongation and tensile strength) and is prepared by a technically simple process.
    • 给出了具有高固体含量的聚氨酯聚合物或填料的无溶剂聚氨酯分散体的描述,其可通过以下方式获得:a)允许相对高分子量的多元醇组分(A)(i),并且如果需要,可以获得低分子量 多元醇组分(A)(ⅱ)在催化剂存在或不存在下与多异氰酸酯组分(B)反应得到聚氨酯预加成物,然后b)使来自步骤a)的聚氨酯预加合物与低分子量和阴离子可修饰的多元醇 含有两个或多个羟基和一个或多个羧基以得到相应的预聚物的组分(A)(iii),c)使来自步骤b)的预聚物与中和组分(C)反应,直到羧基完全 或部分中和,随后或同时)将中和的预聚物从步骤c)分散在水中,其可以进一步包含配料组分(F),其包含填料,颜料,塑性 使得步骤d)的分散体与链延伸组分(D)反应,和f)如果需要,使步骤e)的分散体与链终止组分(E)反应。 由于其制备方法,本发明的聚氨酯分散体具有理想的线性分段结构,并且具有非常高的固体含量,结合相对低的粘度,完全不含溶剂,优异的材料性能(例如 弹性,伸长率和拉伸强度),并通过技术上简单的工艺制备。