公开(公告)号：US20160332949A1

公开(公告)日：2016-11-17

申请号：US15111258

申请日：2015-01-20

Applicant: RHODIA OPERATIONS

Inventor： Pierre ARDAUD ,  Thierry VIDAL ,  Rabih RACHED

IPC: C07C51/573 ,  C07C51/56

CPC classification number: C07C51/573 ,  C07C51/56 ,  C07C57/04

Abstract: The invention relates to a method for producing a (meth)acrylic anhydride A-C(═O)—O—(O═)C-A, comprising the following steps: a) a step of reacting an anhydride B—C(═O)—O—(O═)C—B with an acid A-COOH, resulting in the formation of mixed anhydride A-C(═O)—O—(O═)C—B and acid B—COOH; and b) a step of reacting the mixed anhydride with A-COOH, resulting in the (meth)acrylic anhydride. According to the invention, reaction steps (a) and (b) are carried out in the presence of hydrated triflic acid, and the anhydride A-C(═O)—O—(O═)C-A is isolated from the reaction medium produced in step (b) as follows: e1) heavy compounds having a volatility less than or equal to that of the anhydride A-C(═O)—O—(O═)C-A are separated from the reaction medium, said compounds including the anhydride and the hydrated triflic acid; e2) the anhydride is separated from the heavy compounds by difference in volatility.

Abstract translation: 本发明涉及一种制备（甲基）丙烯酸酐AC（= O）-O-（O =）CA的方法，包括以下步骤：a）使酸酐B-C（= O）-O - （O =）C-B与酸A-COOH反应，形成混合酸酐AC（= O）-O-（O =）C-B和酸B-COOH; 和b）使混合酸酐与A-COOH反应的步骤，得到（甲基）丙烯酸酐。 根据本发明，反应步骤（a）和（b）在水合三氟甲酸的存在下进行，并且从步骤（a）中产生的反应介质中分离酸酐AC（= O）-O- （b）如下：e1）具有小于或等于酸酐AC（= O）-O-（O =）CA的挥发性的重质化合物与反应介质分离，所述化合物包括酸酐和水合 三氟甲磺酸 e2）通过挥发性差异将酸酐与重质化合物分离。

公开(公告)号：US20170029690A1

公开(公告)日：2017-02-02

申请号：US15292277

申请日：2016-10-13

Applicant: RHODIA OPERATIONS

Inventor： Amaud CADIX ,  Rabih RACHED ,  Pierre ARDAUD

IPC: C09K8/516 ,  C09K8/508 ,  C09K8/575 ,  C09D175/14 ,  F16L55/1645 ,  E21B33/138 ,  E21D11/38 ,  E02D37/00 ,  E02D3/12 ,  C09K8/44 ,  C09D5/02

CPC classification number: C09K8/516 ,  C09D5/022 ,  C09D175/14 ,  C09K8/44 ,  C09K8/508 ,  C09K8/5751 ,  C09K17/18 ,  C09K17/48 ,  C09K2208/14 ,  E02D3/12 ,  E02D37/00 ,  E21B33/138 ,  E21D11/38 ,  F16L55/1645

Abstract: A process allowing the encapsulation of a polymerization accelerator comprising the steps of: a) providing an reverse emulsion containing, in an oil phase, a water solution/dispersion containing the polymerisation activator, the oil phase including a heat curable mixture of an isocyanate and a polyalkyldiene hydroxylated or polyol, b) pouring the reverse emulsion in a water phase to make a multiple emulsion water/oil/water, containing drops of activators as the internal water phase, and then, c) heating the multiple emulsion obtained in step b) to cure the polyisocyanate in polyurethane and obtain drops of activator enclosed in shells of polyurethane dispersed in water. The invention also relates to aqueous gelling systems comprising the encapsulated polymerization accelerator with water soluble or dispersable monomers and a polymerization initiator dispersed in said monomers, useful i.a. for sealing subterranean environments or consolidation of a soil or sealing of a subterranean structure.

Abstract translation: 一种允许包封聚合促进剂的方法，包括以下步骤：a）提供在油相中含有含有聚合活化剂的水溶液/分散体的反相乳液，所述油相包含异氰酸酯和 聚烷基二烯羟基化或多元醇，b）将反相乳液倒入水相中制成含有作为内部水相的活化剂滴的多重乳液水/油/水，然后c）加热步骤b）中获得的多重乳液， 固化聚氨酯中的多异氰酸酯，并得到封闭在聚氨酯分散在水中的活化剂滴。 本发明还涉及包含水溶性或可分散单体的包封聚合促进剂和分散在所述单体中的聚合引发剂的水性胶凝体系，可用于约 用于密封地下环境或固结土壤或地下结构的密封。