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。