Process to polymerize AB-PBO monomer phosphate salts
    3.
    发明授权
    Process to polymerize AB-PBO monomer phosphate salts 失效
    聚合AB-PBO单体磷酸盐的方法

    公开(公告)号:US5210171A

    公开(公告)日:1993-05-11

    申请号:US546597

    申请日:1990-06-29

    IPC分类号: C07C227/06 C08G73/22

    CPC分类号: C08G73/22 C07C227/06

    摘要: AB-polybenzoxazole monomer, such as 3-amino-4-hydroxybenzoic acid, can be synthesized in high yields from a hydroxy-benzoic acid or related compound in a three-step process of (1) nitration, (2) hydrolysis of the ester, and (3) reduction of the nitro moiety. The monomer is conveniently recovered as a phosphate salt in high purity by precipitating and recrystallizing from a phosphoric acid solution. The monomer may be polymerized in high concentrations in polyphosphoric acid containing high levels of P.sub.2 O.sub.5 to yield a high molecular weight polymer without dehydrohalogenation.

    摘要翻译: 可以在(1)硝化的三步法中,从羟基 - 苯甲酸或相关化合物以高产率合成AB-聚苯并恶唑单体,例如3-氨基-4-羟基苯甲酸,(2)酯的水解 ,和(3)还原硝基部分。 通过从磷酸溶液中沉淀和重结晶,可以方便地将单体作为高纯度的磷酸盐回收。 单体可以在含有高含量的P 2 O 5的多磷酸中以高浓度聚合,得到高分子量聚合物,而无需脱卤化氢。

    Process to synthesize AB-PBO monomer and phosphate salts thereof
    5.
    发明授权
    Process to synthesize AB-PBO monomer and phosphate salts thereof 失效
    合成AB-PBO单体及其磷酸盐的方法

    公开(公告)号:US4959492A

    公开(公告)日:1990-09-25

    申请号:US380567

    申请日:1989-07-14

    CPC分类号: C07C227/06 C08G73/22

    摘要: AB-polybenzoxazole monomer, such as 3-amino-4-hydroxybenzoic acid, can be synthesized in high yields from a hydroxy-benzoic acid or related compound in a three-step process of (1) nitration, (2) hydrolysis of the ester, and (3) reduction of the nitro moiety. The monomer is conveniently recovered as a phosphate salt in high purity by precipitating and recrystallizing from a phosphoric acid solution.

    摘要翻译: 可以在(1)硝化的三步法中,从羟基 - 苯甲酸或相关化合物以高产率合成AB-聚苯并恶唑单体,例如3-氨基-4-羟基苯甲酸,(2)酯的水解 ,和(3)还原硝基部分。 通过从磷酸溶液中沉淀和重结晶,可以方便地将单体作为高纯度的磷酸盐回收。

    Phosphate salts of AB-polybenzoxazole monomer
    7.
    发明授权
    Phosphate salts of AB-polybenzoxazole monomer 失效
    AB-聚苯并恶唑单体的磷酸盐

    公开(公告)号:US5068384A

    公开(公告)日:1991-11-26

    申请号:US546596

    申请日:1990-06-29

    IPC分类号: C07C227/06 C08G73/22

    CPC分类号: C07C227/06 C08G73/22

    摘要: AB-polybenzoxazole monomer, such as 3-amino-4-hydroxybenzoic acid, can be synthesized in high yields from a hydroxy-benzoic acid or related compound in a three-step process of (1) nitration, (2) hydrolysis of the ester, and (3) reduction of the nitro moiety. The monomer is conveniently recovered as a phosphate salt in high purity by precipitating and recrystallizing from a phosphoric acid solution.

    摘要翻译: 可以在(1)硝化的三步法中,从羟基 - 苯甲酸或相关化合物以高产率合成AB-聚苯并恶唑单体,例如3-氨基-4-羟基苯甲酸,(2)酯的水解 ,和(3)还原硝基部分。 通过从磷酸溶液中沉淀和重结晶,可以方便地将单体作为高纯度的磷酸盐回收。

    PREPOLYMERS AND POLYMERS FOR ELASTOMERS
    10.
    发明申请
    PREPOLYMERS AND POLYMERS FOR ELASTOMERS 审中-公开
    弹性体的制备物和聚合物

    公开(公告)号:US20100266799A1

    公开(公告)日:2010-10-21

    申请号:US12668500

    申请日:2008-07-09

    IPC分类号: C08G18/10 C08G18/34 B32B1/08

    摘要: A prepolymer or elastomer is the reaction product of reactants (a) at least one polyester polyol or fatty acid derived polyol which is the reaction product of at least one initiator and a mixture of fatty acids or derivatives of fatty acids comprising at least about 45 weight percent monounsaturated fatty acids or derivatives thereof, (b) optionally, at least one polyol which is different from the polyol of (a); and (c) at least one isocyanate compound (herein after isocyanate) having an average of at least about 1.8 isocyanate groups per molecule. A process comprises admixing reactants (a) at least one polyol composition comprising the fatty acid derived polyol which is the reaction product of at least one initiator and a mixture of fatty acids or derivatives of fatty acids comprising at least about any of 45 weight percent monounsaturated fatty acids or derivatives thereof; and (b) at least one isocyanate having an average functionality of at least about 1.8 under reaction conditions to form a reaction product which is an elastomer or prepolymer is formed therefrom. An article, coating or thermoplastic polyurethane comprises the elastomer is formed from the prepolymer of or using the process of the invention.

    摘要翻译: 预聚物或弹性体是反应物(a)至少一种聚酯多元醇或脂肪酸衍生多元醇的反应产物,其是至少一种引发剂与脂肪酸或包含至少约45重量%的脂肪酸​​的衍生物的混合物的反应产物 百分比的单不饱和脂肪酸或其衍生物,(b)任选的至少一种不同于(a)的多元醇的多元醇; 和(c)每分子平均具有至少约1.8个异氰酸酯基团的至少一种异氰酸酯化合物(本文中为异氰酸酯)。 一种方法包括混合反应物(a)至少一种多元醇组合物,其包含脂肪酸衍生的多元醇,其是至少一种引发剂的反应产物和脂肪酸或脂肪酸的混合物的混合物,其至少包含约45重量%的单不饱和物 脂肪酸或其衍生物; 和(b)在反应条件下至少一种具有至少约1.8的平均官能度的异氰酸酯形成由弹性体或预聚物形成的反应产物。 一种制品,涂层或热塑性聚氨酯包括弹性体由本发明的预聚物或使用本发明的方法形成。