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    • 4. 发明授权
    • Pure, in particular catalyst-free polyurethanes
    • 纯的,特别是无催化剂的聚氨酯
    • US5374704A
    • 1994-12-20
    • US166760
    • 1993-12-14
    • Hanns-Peter MullerRolf DheinHerbert HuglHeinz Pudleiner
    • Hanns-Peter MullerRolf DheinHerbert HuglHeinz Pudleiner
    • A61L24/00A61L27/00A61L27/18A61L29/00A61L29/06A61L31/06B65D65/38C08G18/08C08G18/10C08G18/44C08G18/73C08G18/75C08G18/77C08J5/18
    • C08G18/773A61L27/18A61L29/06A61L31/06C08G18/10C08G18/44C08G18/75
    • The present invention is directed to pure polyurethanes which are biocompatible. These pure polyurethanes comprise the reaction product of:a) a pre-adduct containing NCO groups and comprising the reaction product ofi) a diisocyanate selected from the group consisting of aliphatic diisocyanates, cycloaliphatic diisocyanates, and mixtures thereof, withii) a macrodiol having a molecular weight of from 500 to 10,000 wherein said components i) and ii) reacted at temperatures of from 90.degree.-150.degree. C.; withb) a chain extender having a molecular weight of from 62 to 400 and being selected from the group consisting of aliphatic diols, cycloaliphatic diols, and mixtures thereof, and optionally,c) additional diisocyanate selected from the group consisting of aliphatic diisocyanates, cycloaliphatic diisocyanates, and mixtures thereof,wherein said component c), when added, is added either simultaneously with component b) or separately from component b), the quantities of components a)i), a)ii), and c) being such that the molar ratio of diisocyanate to macrodiol is from 1.5:1 to 22:1, and the reaction of components a) and b) and optionally component c) is conducted at temperatures of from 90.degree. to 230.degree. C., with the proviso that the reaction conditions are maintained until said polyurethane has a melt viscosity of at least 2500 mPa.s at 120.degree. C.
    • 本发明涉及生物相容的纯聚氨酯。 这些纯聚氨酯包括以下物质的反应产物:a)含有NCO基团的预加合物,其包含i)选自脂族二异氰酸酯,脂环族二异氰酸酯及其混合物的二异氰酸酯的反应产物,ii)具有 分子量为500至10,000,其中所述组分i)和ii)在90-150℃的温度下反应; 其中b)分子量为62至400的扩链剂,并且选自脂族二醇,脂环族二醇及其混合物,以及任选地,c)另外的二异氰酸酯,其选自脂族二异氰酸酯,脂环族脂族 二异氰酸酯及其混合物,其中所述组分c)在加入时与组分b)同时加入或与组分b)分开加入,组分a)i),a)ii)和c)的数量使得 二异氰酸酯与大分子二醇的摩尔比为1.5:1至22:1,组分a)和b)和任选组分c)的反应在90℃至230℃的温度下进行,条件是 维持反应条件,直到所述聚氨酯在120℃下的熔体粘度为至少2500mPa.s。
    • 9. 发明授权
    • Process for the production of coated substrates
    • 生产涂层基材的方法
    • US4619966A
    • 1986-10-28
    • US795965
    • 1985-11-07
    • Walter SchaferManfred HajekHanns P. MullerRolf DheinRolf KuchenmeisterArmin Sickert
    • Walter SchaferManfred HajekHanns P. MullerRolf DheinRolf KuchenmeisterArmin Sickert
    • B05D5/00B05D7/24B05D7/26C08G18/08C08G18/28C08G18/38C08G18/83C09D175/00C08L75/04
    • C08G18/3838C08G18/0819C08G18/285C08G18/83
    • The present invention is directed to a process for the production of water- and solvent-resistant coated substrates by coating heat-resistant substrates with a solution or dispersion of an anionic group-containing polyisocyanate addition product in an aqueous solvent or dispersant and subsequently thermally treating the coating at a temperature of about 60.degree. to 200.degree. C., with evaporation or vaporization of the solvent or dispersant and simultaneous crosslinking of the polyisocyanate addition product which has been applied to the substrate, characterized in that incorporated anionic structural units corresponding to the formula ##STR1## are used in a quantity of about 5 to 1000 milliequivalents per 100 g of solids and the solids are based on reaction products of organic polyisocyanates with salts of cyanamide and bases selected from ammonia, primary and secondary amines having a minimum pKb value of 3.1, tertiary amines and mixtures thereof. The present invention also relates to the aqueous solutions or dispersions of anionically-modified polyisocyanate addition products.
    • 本发明涉及通过用含有阴离子基团的多异氰酸酯加成产物在水性溶剂或分散剂中的溶液或分散体涂覆耐热基材并随后热处理来生产耐水和耐溶剂的涂布基材的方法 该涂层在约60℃至200℃的温度下,通过溶剂或分散剂的蒸发或蒸发,以及已经施加到基材上的多异氰酸酯加成产物的同时交联,其特征在于结合的阴离子结构单元对应于 式“IMAGE”的使用量为每100g固体约5至1000毫当量,固体是基于有机多异氰酸酯与氰胺和选自氨,最小pKb值的伯胺和仲胺的碱的反应产物 3.1,叔胺及其混合物。 本发明还涉及阴离子改性的多异氰酸酯加成产物的水溶液或分散体。