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    Process for cross-linkable pulverulent coating compositions based on uretdione polyisocyanates
    1.
    发明授权
    Process for cross-linkable pulverulent coating compositions based on uretdione polyisocyanates 失效
    基于脲二酮多异氰酸酯的可交联粉末涂料组合物的方法

    公开(公告)号：US3923743A

    公开(公告)日：1975-12-02

    申请号：US44685774

    申请日：1974-02-28

    Applicant: BAYER AG

    Inventor： QUIRING BERND ,  WAGNER KUNO ,  MULLER RICHARD ,  MULLER PETER

    IPC: C09D5/03 ,  C08G18/00 ,  C08G18/79 ,  C09D5/46 ,  C09D175/00 ,  C08G18/06 ,  B05B5/02

    CPC classification number: C09D175/00 ,  C08G18/798 ,  C08G2150/20

    Abstract: A pulverulent coating composition adapted to be applied to a substrate by spraying as a powder is prepared by a process which comprises reacting an organic polyisocyanate containing a uretdione group with an organic compound containing groups which contain reactive hydrogen atoms determinable by the Zerewitinoff method wherein the functionality of the reactants and the proportions thereof are chosen to provide an average functionality between about 2.05 and 10, the ratio of reactive hydrogen groups to -NCO groups is between about 1.07 to 1 and about 2.5 to 1 and the amount of polyisocyanate containing uretdione groups is sufficient to provide from about 0.6 percent to about 25 percent by weight uretdione groups.

    Abstract translation: 通过包括使含有脲二酮基团的有机多异氰酸酯与含有可通过Zerewitinoff法测定的反应性氢原子的有机化合物反应的方法制备适于通过喷雾作为粉末施加到基材上的粉末涂料组合物，其中官能度 选择反应物及其比例以提供约2.05至10的平均官能度，反应性氢基团与-NCO基团的比例在约1.07至约2.5至1之间，并且含有脲二酮基团的多异氰酸酯的量为 足以提供约0.6重量％至约25重量％的脲二酮基团。

    Pulverizable acrylic resins
    2.
    发明授权
    Pulverizable acrylic resins 失效
    可粉碎丙烯酸树脂

    公开(公告)号：US3879357A

    公开(公告)日：1975-04-22

    申请号：US43721074

    申请日：1974-01-28

    Applicant: BAYER AG

    Inventor： WINGLER FRANK ,  MULLER RICHARD ,  WASSMUTH GERD ,  ERDMENGER RUDOLF ,  ULLRICH MARTIN

    IPC: C08F2/00 ,  C08F2/02 ,  C08F212/00 ,  C08F212/06 ,  C08F220/00 ,  C08F220/04 ,  C08F220/10 ,  C08F220/12 ,  C09D5/46 ,  C08F1/04 ,  C08F15/02 ,  C08F15/40

    CPC classification number: C08F220/12 ,  C08F212/06 ,  Y10S526/934

    Abstract: Copolymer having an average molecular weight of 500 to 10,000, a glass transition temperature of 40* to 70*C and an acid number of 55 to 120 mg of KOH/g of copolymer, said copolymer being the product of free radical copolymerization of a monomer mixture of I. 0 to 55 mol % of styrene, Alpha -methylstyrene, methylmethacrylate or mixtures thereof; II. 10 to 25 mol % of acrylic acid, methacrylic acid or mixtures thereof; III. 0 to 70 mol % of at least one ester of methacrylic acid containing 2 to 18 carbon atoms in the alcohol component and IV. 20 to 50 mol % of at least one ester of acrylic acid containing 1 to 18 carbon atoms in the alcohol component, AND PROCESS OF PRODUCING SAID COPOLYMER BY CONTINUOUSLY POLYMERIZING SAID MONOMER MIXTURE IN A CONTINUOUSLY FED PROCESS UNDER STEADY STATE AND PERFECTLY AGITATED CONDITIONS TO A CONVERSION OF 35 TO 60 MOL % AND THEN POLYMERIZING RESULTING POLYMERIZATION REACTION MIXTURE TO A CONVERSION OF AT LEAST 94 MOL % UNDER NON-STEADY STATE CONDITIONS WHICH PREVENT BACK MIXING OF THE POLYMER PRODUCED IN SAID SECOND POLYMERIZATION STEP WITH POLYMERIZATION REACTION MIXTURE FROM SAID FIRST POLYMERIZATION REACTION STEP IN A TUBULAR PLUG FLOW REACTOR UNDER NON-STEADY STATE CONDITIONS.

    Abstract translation: 共聚物的平均分子量为500〜10,000，玻璃化转变温度为40〜70℃，酸值为55〜120mg KOH / g共聚物，所述共聚物为单体的自由基共聚 1. 0〜55摩尔％苯乙烯，α-甲基苯乙烯，甲基丙烯酸甲酯或其混合物的混合物; 二， 10-25mol％的丙烯酸，甲基丙烯酸或其混合物; 三， 0至70mol％的至少一种在醇组分中含有2至18个碳原子的甲基丙烯酸酯和IV。 在醇组分中至少一种含有1至18个碳原子的丙烯酸酯的至少一种20至50摩尔％，以及在稳定状态下将连续共混过程中的均聚单体混合物连续聚合而生成共聚物的方法以及对A的完全激发的条件 转化率为35至60摩尔％，然后将聚合度聚合反应混合物转化为至少94摩尔％，在非稳定状态条件下，防止在第二次聚合步骤中产生的聚合物的反混合与聚合反应混合物从第一次聚合反应 在非稳态条件下的管状流体反应器中的反应步骤。

    Pulverulent acrylic resin binder mixtures containing triglycidyl isocyanurate and cellulose acetobutyrate
    3.
    发明授权
    Pulverulent acrylic resin binder mixtures containing triglycidyl isocyanurate and cellulose acetobutyrate 失效
    含有异柠檬酸三乙酯和纤维素乙酰丁酸酯的丙烯酸树脂粘合剂混合物

    公开(公告)号：US3900435A

    公开(公告)日：1975-08-19

    申请号：US45725874

    申请日：1974-04-02

    Applicant: BAYER AG

    Inventor： WINGLER FRANK ,  MULLER RICHARD

    IPC: C09D5/03 ,  C08L1/14 ,  C08L63/06 ,  C09D133/06 ,  B05B5/02 ,  C08B21/08

    CPC classification number: C09D133/064 ,  C08L1/14 ,  C08L63/06 ,  C08L2666/14 ,  C08L2666/02

    Abstract: Copolymers of 23 to 92% by weight of methyl methacrylate, 5-62% by weight of an acrylic acid ester containing from 1 to 12 carbon atoms in the ester portion or a methacrylic acid ester containing from 2 to 12 carbon atoms in the ester portion and 3 to 15% by weight of unsaturated copolymerizable carboxylic acids are homogeneously mixed with triglycidyl isocyanurate, cellulose acetobutyrates and optionally with pigments and levelling agents. The mixture may be applied by electrostatic powder-spraying or other powder coating processes to suitable surfaces and cured at temperatures of about 130* to 220*C. The backed films of the mixture show outstanding adherence to the substrate and hardness coupled with elasticity, high gloss and weather resistance.

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