公开(公告)号：EP0485708A2

公开(公告)日：1992-05-20

申请号：EP91115579.4

申请日：1991-09-13

Applicant: YEDA RESEARCH AND DEVELOPMENT COMPANY LIMITED

Inventor： Levin, Gideon

IPC: C08J3/24 ,  C08J7/12 ,  C08K5/39

CPC classification number: C08J3/245 ,  A01N25/10 ,  A61K47/32 ,  C08F8/34 ,  C08J5/18 ,  C08J2327/06 ,  C08K5/39 ,  Y02P20/149 ,  C08L27/06 ,  C08F114/06

Abstract: Crosslinked plasticized or unplasticized PVC products having gradient crosslinking density, with a high crosslinking density on the outer surface and a low or none crosslinking density at the bulk of the product, are prepared by immersing the PVC product in a hot water solution of a crosslinking material and a phase transfer catalyst. The products obtained provide controlled release of substances occluded within the PVC matrix, thus preventing leakage of plasticizers, stabilizers and other additives, and permitting controlled slow release of substances like pesticides, fertilizers, drugs and the like, into the surrounding environment.

Abstract translation: 通过将PVC产品浸入交联材料的热水溶液中制备具有梯度交联密度，外表面上具有高交联密度和产品主体上低交联密度或低交联密度的交联的增塑或未增塑PVC产品 和相转移催化剂。 获得的产品提供控制在PVC基体内封闭的物质的释放，从而防止增塑剂，稳定剂和其他添加剂的渗漏，并允许将药物，化肥，药物等物质缓慢释放到周围环境中。

公开(公告)号：EP0485708B1

公开(公告)日：1997-01-29

申请号：EP91115579.4

申请日：1991-09-13

Applicant: YEDA RESEARCH AND DEVELOPMENT COMPANY LIMITED

Inventor： Levin, Gideon

IPC: C08J3/24 ,  C08J7/12 ,  C08K5/39

CPC classification number: C08J3/245 ,  A01N25/10 ,  A61K47/32 ,  C08F8/34 ,  C08J5/18 ,  C08J2327/06 ,  C08K5/39 ,  Y02P20/149 ,  C08L27/06 ,  C08F114/06

公开(公告)号：EP0485708A3

公开(公告)日：1992-07-08

申请号：EP91115579.4

申请日：1991-09-13

Applicant: YEDA RESEARCH AND DEVELOPMENT COMPANY LIMITED

Inventor： Levin, Gideon

IPC: C08J3/24 ,  C08J7/12 ,  C08K5/39

CPC classification number: C08J3/245 ,  A01N25/10 ,  A61K47/32 ,  C08F8/34 ,  C08J5/18 ,  C08J2327/06 ,  C08K5/39 ,  Y02P20/149 ,  C08L27/06 ,  C08F114/06

Abstract: Crosslinked plasticized or unplasticized PVC products having gradient crosslinking density, with a high crosslinking density on the outer surface and a low or none crosslinking density at the bulk of the product, are prepared by immersing the PVC product in a hot water solution of a crosslinking material and a phase transfer catalyst. The products obtained provide controlled release of substances occluded within the PVC matrix, thus preventing leakage of plasticizers, stabilizers and other additives, and permitting controlled slow release of substances like pesticides, fertilizers, drugs and the like, into the surrounding environment.