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    • 3. 发明授权
    • Less shear-thinning polyvinyl acetals
    • 较少剪切变薄的聚乙烯醇缩醛
    • US07776962B2
    • 2010-08-17
    • US11719040
    • 2005-11-03
    • Kurt Stark
    • Kurt Stark
    • C08F8/00
    • C09D129/14C08F8/48C08F8/28C08F16/06
    • Low shear-thinning polyvinyl acetals having a solution viscosity in 30% strength by weight solution in methyl ethyl ketone which changes by not more than 10% in a shear rate range from 1 to 100 s−1. The preparation of the low shear-thinning polyvinyl acetals involves acetalation of partly hydrolyzed or completely hydrolyzed vinyl ester polymers comprising ≧50 mol % of vinyl alcohol units with one or more aldehydes, optionally in the form of the hydrates, hemiacetals or full acetals, wherein from 0 to 60% by weight of the aldehyde, based on the total amount of the aldehyde, is initially introduced over the course of the first one to ten minutes of the acetalation and is prereacted over the course of from 1 to 30 minutes, and the remaining proportion is then metered in continuously over the course of at least 20 minutes.
    • 低剪切稀化的聚乙烯醇缩醛,其溶液粘度在甲基乙基酮中的30重量%强度重量溶液中,在1至100s -1的剪切速率范围内变化不超过10%。 低剪切稀化聚乙烯醇缩醛的制备涉及部分水解或完全水解的乙烯基酯聚合物的缩醛化,其包含≥50mol%乙烯醇单元与一种或多种醛,任选呈水合物,半缩醛或全缩醛的形式,其中 基于醛的总量,醛的0至60重量%最初在缩醛的第一个1至10分钟的过程中引入,并且在1至30分钟的时间内预反应,并且 然后在至少20分钟的时间内连续计量剩余的比例。
    • 7. 发明授权
    • Thermoplastic silicone block copolymers, the production thereof and the use of the same
    • 热塑性硅酮嵌段共聚物,其生产方法及其用途
    • US06824881B2
    • 2004-11-30
    • US10451594
    • 2003-06-23
    • Hans LautenschlagerJochen DauthWolfgang KellerTheo MayerKurt Stark
    • Hans LautenschlagerJochen DauthWolfgang KellerTheo MayerKurt Stark
    • B32B2732
    • C08G77/52C08G77/38C08G77/442C09D183/10Y10T428/31663Y10T428/31855
    • Thermoplastic silicon block copolymers containing (A) a hard segment polymer constituent prepared from styrene, methylmethacrylate, butylacrylate, acrylonitrile, vinyl monomers, or mixtures therefore, and (B) a soft segment polymer constituent of general formula (I) G-[(SiR2O)mSiR2—X—]n(SiR2O)mSiR2-G wherein R is an optionally halogenated monovalent C1-18 hydrocarbon radical and X is a specific aryl group-containing, silicon bonded radical, and each G may be a radical (A)-Z-(Si) or Z′-(Si) wherein -Z- represents an aryl group-containing bivalent radical and Z′- represents a monovalent aryl group-containing radical, provided that there is, at most, one radical G and one radical Z′- in formula (I). In formula (I), m represents a whole number between 1 and 1000 and n represents 0 or a whole number between 1 and 20, provided that when n does not equal 0, 4≦n·m≦1000.
    • 含有(A)由苯乙烯,甲基丙烯酸甲酯,丙烯酸丁酯,丙烯腈,乙烯基单体或其混合物制备的硬链段聚合物组分的热塑性硅嵌段共聚物,和(B)通式(I)的软链段聚合物组分G - [(SiR 2 O )mSiR 2 -X-n(SiR 2 O)m SiR 2 -G其中R是任选卤代的一价C 1-18烃基,X是特定的含芳基的硅键合基团,并且每个G可以是基团(A) - Z-(Si)或Z' - (Si)其中-Z-表示含芳基的二价基团,Z'表示含单价芳基的基团,条件是至多存在一个基团G和一个 式(I)中的基团Z'-。 在式(I)中,m表示1与1000之间的整数,n表示0或1至20之间的整数,条件是当n不等于0时,4 <= n.m <= 1000。