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    Method for incorporating alkyl ester endgroups to improve the release properties of melt polycarbonate
    2.
    发明授权
    Method for incorporating alkyl ester endgroups to improve the release properties of melt polycarbonate 有权
    用于加入烷基酯端基以改善熔融聚碳酸酯的脱模性能的方法

    公开(公告)号：US07105626B2

    公开(公告)日：2006-09-12

    申请号：US10938337

    申请日：2004-09-10

    申请人： Hans-Peter Brack ,  Dennis Karlik ,  Jan Pleun Lens

    发明人： Hans-Peter Brack ,  Dennis Karlik ,  Jan Pleun Lens

    IPC分类号： C08G64/00

    CPC分类号： C08G64/42 ,  C08G2650/04

    摘要： Alkyl ester end-capped polycarbonates have improved release properties and may be produced by a method comprising the step of combining a polycarbonate having free terminal OH groups with an end-capping reagent comprising a symmetrical activated carbonate and an alkyl ester, whereby the end-capping reagent reacts with at least some of the free hydroxyl end groups of the polycarbonate to produce an end-capped polycarbonate comprising optionally substituted aliphatic ester end groups.

    摘要翻译： 烷基酯封端的聚碳酸酯具有改进的脱模性能，并且可以通过包括以下步骤的方法制备：将具有游离的末端OH基团的聚碳酸酯与包含对称活性碳酸酯和烷基酯的封端剂组合的步骤，由此封端 试剂与聚碳酸酯的至少一些游离羟基端基反应以制备包含任选取代的脂族酯端基的封端聚碳酸酯。

    Silylated polycarbonate polymers, method of making, and articles
    5.
    发明申请
    Silylated polycarbonate polymers, method of making, and articles 审中-公开
    硅烷化聚碳酸酯聚合物，制备方法和制品

    公开(公告)号：US20080306294A1

    公开(公告)日：2008-12-11

    申请号：US11962754

    申请日：2007-12-21

    申请人： Jan Pleun Lens ,  Tilak T. Raj ,  Binod Behari Sahoo ,  Arakali Sreenivasarao Radhakrishna

    发明人： Jan Pleun Lens ,  Tilak T. Raj ,  Binod Behari Sahoo ,  Arakali Sreenivasarao Radhakrishna

    IPC分类号： C07F7/08

    CPC分类号： C07F7/0838

    摘要： A silylated dihydroxy aromatic compound of the formula (1a); wherein Ga and Gb are each independently C1-12 alkyl, —OSi(C1-12 alkyl)3, C1-12 arylalkyl, or —OSi(C1-12 arylalkyl)3; Za and Zb are each independently a straight or branched C2-18 alkylene, a C8-18 arylalkylene, or a C8-18 alkylarylene, Xa is a direct bond, a heteroatom-containing group, or a C1-18 organic group, and r and s are each independently 1 or 2 is disclosed.

    摘要翻译： 式（1a）的甲硅烷基化二羟基芳族化合物; 其中Ga和Gb各自独立地为C1-12烷基，-OSi（C1-12烷基）3，C1-12芳烷基或-OSi（C1-12芳烷基）3; Za和Zb各自独立地为直链或支链C 18-18亚烷基，C 8-18芳基亚烷基或C 8-18烷基亚芳基，X a是直接键，含杂原子的基团或C 1-18有机基团，r 和各自独立地1或2被公开。

    Method for making copolycarbonates
    6.
    发明授权
    Method for making copolycarbonates 有权
    制备共聚碳酸酯的方法

    公开(公告)号：US06657038B1

    公开(公告)日：2003-12-02

    申请号：US10284567

    申请日：2002-11-01

    申请人： Jan Pleun Lens ,  Jan Henk Kamps

    发明人： Jan Pleun Lens ,  Jan Henk Kamps

    IPC分类号： C08G6400

    CPC分类号： C08G64/307 ,  C08G64/06

    摘要： A melt polymerization method is presented which permits the efficient preparation of copolycarbonates in which one or more of the constituent dihydroxy. aromatic compounds employed is relatively volatile, having a boiling point of less than about 340° C. Relatively volatile dihydroxy aromatic compounds are illustrated by dihydroxybenzenes such as hydroquinone, methyl hydroquinone and resorcinol. Known methods for the preparation of members of this class of copolycarbonates, such as the melt reaction of bisphenol A and resorcinol diphenyl carbonate in the presence of sodium hydroxide and tetraalkylammonium salt catalyst systems, suffer losses in efficiency due to the resorcinol being entrained out of the polymerization mixture with by-product phenol. Catalyst systems including quaternary phosphonium salts are shown to have improved performance with respect to the amount of volatile dihydroxy aromatic compound actually incorporated into the product copolycarbonate.

    摘要翻译： 提出了一种熔融聚合方法，其可以有效地制备其中一种或多种组分二羟基的共聚碳酸酯。 使用的芳族化合物相对挥发，沸点低于约340℃。相对挥发性的二羟基芳族化合物由二氢羟苯如氢醌，甲基氢醌和间苯二酚表示。 用于制备这种类型的共聚碳酸酯的成员的已知方法，例如双酚A和间苯二酚碳酸二苯酯在氢氧化钠和四烷基铵盐催化剂体系的存在下的熔融反应，由于间苯二酚被夹带在 聚合混合物与副产物苯酚。 显示出包含季鏻盐的催化剂体系相对于实际掺入到产物共聚碳酸酯中的挥发性二羟基芳族化合物的量具有改进的性能。

    Flame retardant and scratch resistant thermoplastic polycarbonate compositions
    8.
    发明授权
    Flame retardant and scratch resistant thermoplastic polycarbonate compositions 有权
    阻燃和耐划伤热塑性聚碳酸酯组合物

    公开(公告)号：US08674007B2

    公开(公告)日：2014-03-18

    申请号：US11456953

    申请日：2006-07-12

    申请人： Srinivas Siripurapu ,  Naveen Agarwal ,  Jan Pleun Lens

    发明人： Srinivas Siripurapu ,  Naveen Agarwal ,  Jan Pleun Lens

    IPC分类号： C08L69/00 ,  C08L83/10 ,  C08L55/00 ,  C08K5/523

    CPC分类号： C08L69/00 ,  C08F265/04 ,  C08K5/0066 ,  C08K5/523 ,  C08L51/04 ,  C08L55/02 ,  C08L83/10 ,  C08F212/10 ,  C08L2666/24 ,  C08L2666/84 ,  C08L2666/02

    摘要： A flame retardant thermoplastic composition comprising in combination a polycarbonate homopolymer or copolymer comprising repeat carbonate units having the following structure: wherein R1 and R2 are independently at each occurrence a C1-C4 alkyl, n and p are each an integer having a value of 1 to 4, and T is selected from the group consisting of C5-C10 cycloalkanes attached to the aryl groups at one or two carbons, C1-C5 alkyl groups, C6-C13 aryl groups, and C7-C12 aryl alkyl groups; an impact modifier, wherein the impact modifier comprises wherein the impact modifier comprises a rubber modified thermoplastic resin comprising a discontinuous elastomeric phase dispersed in a rigid thermoplastic phase, and wherein the impact modifier has a specific mean particle size and Q value; and a flame retardant. The compositions have excellent scratch resistance as well as an improved balance of physical properties such as impact strength and spiral flow, while at the same time maintaining their good flame performance.

    摘要翻译： 一种阻燃热塑性组合物，其组合包含聚碳酸酯均聚物或共聚物，其包含具有以下结构的重复碳酸酯单元：其中R 1和R 2在每次出现时独立地为C 1 -C 4烷基，n和p各自为具有1至 4，并且T选自与一个或两个碳上的芳基连接的C 5 -C 10环烷烃，C 1 -C 5烷基，C 6 -C 13芳基和C 7 -C 12芳基烷基; 抗冲改性剂，其中所述抗冲改性剂包括其中所述抗冲改性剂包括橡胶改性的热塑性树脂，其包含分散在刚性热塑性相中的不连续弹性体相，并且其中所述抗冲改性剂具有特定的平均粒度和Q值; 和阻燃剂。 组合物具有优异的耐刮擦性以及改善的物理性能的平衡，例如冲击强度和螺旋流，同时保持其良好的火焰性能。