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    • 13. 发明授权
    • Polyurethane dispersions and their use as binders in stoving lacquers
    • 聚氨酯分散体及其作为粘合剂在烤漆中的应用
    • US5563206A
    • 1996-10-08
    • US433485
    • 1995-05-11
    • Ulrich EickenAlfred WestfechtelRainer HoeferRoland Gruetzmacher
    • Ulrich EickenAlfred WestfechtelRainer HoeferRoland Gruetzmacher
    • C08G18/00C08G18/08C08G18/10C08G18/12C08G18/32C08G18/65C08G18/66C09D175/00C09D175/04C08G18/62
    • C08G18/6607C08G18/0804C08G18/0823C08G18/12C08G18/3212
    • Aqueous polyurethane dispersions prepared in several stages by reactingA) aliphatic and/or aromatic di- and/or tri-isocyanates withB1) polyol mixtures containing dimer diols of 25 to 100% by weight of dimer diols and 0 to 75% by weight of other hydrophobic diols and/or polyols, the equivalent ratio of OH to NCO being 1:1.1 to 1:4, and simultaneously or subsequently withB2) chain-extending agents containing two terminal NCO-reactive groups, the chain-extending agents additionally containing either artionic or cationic groups or groups convertible into anionic or cationic groups by neutralization, the equivalent ratio of NCO-reactive groups to NCO groups theoretically still present after the reaction of A) with B1) being 1:0.9 to 1:4, and then optionally reactingC) the NCO groups theoretically still present in the polyurethanes after the reaction of A) with B1) and B2) with polyols containing at least three hydroxyl groups and/or amino alcohols containing at least two hydroxyl groups in an equivalent ratio of OH+amino groups to NCO of at least 3:1, and finally dispersing the polyurethanes obtained in water, the polyurethanes obtained being at least partly neutralized before or during dispersion where the chain extending agents B2) contain as additional groups those groups which are only converted into anionic or cationic groups by neutralization, are provided. Also provided is a process for the production of aqueous polyurethane dispersions and methods of using aqueous polyurethane dispersions so prepared as stoving lacquers.
    • PCT No.PCT / EP93 / 03045 Sec。 371日期1995年5月11日 102(e)日期1995年5月11日PCT 1993年11月2日PCT公布。 公开号WO94 / 11413 日期1994年5月26日通过使A)脂族和/或芳族二 - 和/或三异氰酸酯与B1二元醇混合物反应制备水性聚氨酯分散体,所述B1)多元醇混合物含有25至100重量%的二聚体二醇和0至75的二聚体二醇 重量%的其它疏水性二醇和/或多元醇,OH与NCO的当量比为1:1.1至1:4,同时或随后与含有两个末端NCO-反应性基团的B2)增链剂反应, 通过中和,另外含有芳香族或阳离子基团或基团可以转化为阴离子或阳离子基团的延伸剂,理论上仍然存在的NCO反应性基团与NCO反应基团的当量比在A)与B1)反应后为1:0.9至1: 4,然后任选地使C)在A)与B1)和B2反应后理论上仍然存在于聚氨酯中的NCO基团与含有至少三个羟基的多元醇和/或至少含有tw的氨基醇反应 o羟基以OH +氨基与NCO的当量比至少为3:1,最后分散在水中得到的聚氨酯,得到的聚氨酯在扩链剂B2所含的分散之前或期间至少部分中和 作为附加基团,提供了仅通过中和转化成阴离子或阳离子基团的那些基团。 还提供了制备水性聚氨酯分散体的方法和使用如烘烤漆制备的水性聚氨酯分散体的方法。
    • 17. 发明授权
    • Continuous bulk polymerization process
    • 连续本体聚合工艺
    • US06362296B1
    • 2002-03-26
    • US09183229
    • 1998-10-30
    • Shruti SinghalRainer HoeferJohn E. NowickiGeorge RothDarmesh ChovatiaShailesh Shah
    • Shruti SinghalRainer HoeferJohn E. NowickiGeorge RothDarmesh ChovatiaShailesh Shah
    • C08J22010
    • C08F20/18C08F20/10
    • The invention relates to a process for producing a polymer or copolymer from monomer material comprising an acrylate, methacrylate, or mixture of such monomers, which comprises the steps of: (a) charging into a continuous tube reactor a feedstock comprising said monomer material and a polymerization initiator; (b) maintaining a flow rate of said material through the reactor at a reaction temperature in the reactor and under pressure sufficient to provide a residence time of the feedstock in the reactor during which polymerization will occur, to form a resin product in the reactor, and said resulting resin product comprising unreacted monomer, and (c) devolatilizing said resin product exiting the reactor to remove unreacted monomers, to provide a substantially monomer-free resin product. Further, the invention relates to resin product made by the process. In particular, the invention relates to resin that has a weight average molecular weight of 10,000 or less, and a glass transition temperature of less than 0° C., preferably −20° C. or lower. The resin product of the invention is particularly useful as an additive for coating and casting resin systems.
    • 本发明涉及由包含丙烯酸酯,甲基丙烯酸酯或这些单体的混合物的单体材料制备聚合物或共聚物的方法,其包括以下步骤:(a)将连续管式反应器装入包含所述单体材料的原料和 聚合引发剂; (b)在反应器中的反应温度和足够的压力下保持所述材料通过反应器的流速,以提供原料在聚合反应期间的停留时间,以便在反应器中形成树脂产物, 并且所述得到的树脂产品包含未反应的单体,和(c)使离开反应器的所述树脂产物脱挥发分以除去未反应的单体,以提供基本上不含单体的树脂产物。 此外,本发明涉及通过该方法制备的树脂产品。 特别地,本发明涉及重均分子量为10,000以下,玻璃化转变温度低于0℃,优选为-20℃以下的树脂。 本发明的树脂产品特别可用作涂料和浇铸树脂体系的添加剂。