申请人:Landec Corporation
公开号:EP2502619A2
公开(公告)日:2012-09-26
A release composition for agricultural applications which comprises an ECC polymer and a release material associated with the ECC polymer,
wherein the release material is a fertilizer, biocide, insecticide or fungicide, and wherein the ECC polymer is defined as a polymer
(A) which comprises polymeric molecules having a backbone and comprising at least one moiety which has the formula -b-Cy, wherein the -b-Cy moiety either
(a) forms part of a repeating unit of the backbone, the repeating unit having the formula (1) below
where Ych is a moiety forming part of the backbone, b is a bond or moiety which links the Cy moiety to Ych, and Cy is a moiety which is associated with other moieties to provide the ECC polymer with crystallinity,
or
(b) forms part of a terminal unit of the backbone, the terminal unit having the formula (2) below
-Yterm- b-Cy (2)
where Yterm is a moiety at the end of the backbone, and b and Cy are as defined in formula (1);
(B) in which at least 50% by weight of the Cy moieties are present in terminal units of formula (2); and
(C) which has a crystalline melting temperature, Tp, of at least 0°C and a ΔH of at least 3J/g which results from association of the Cy moieties.
一种用于农业应用的释放组合物,它包括 ECC 聚合物和与 ECC 聚合物相关的释放材料、
其中释放材料为肥料、杀菌剂、杀虫剂或杀真菌剂,ECC 聚合物定义为聚合物
(A) 由具有骨架的聚合物分子组成,至少包含一个分子式为-b-Cy 的分子,其中-b-Cy 分子可以是
(a) 构成骨架重复单元的一部分,该重复单元具有下式(1)
其中 Ych 是构成骨架一部分的分子,b 是连接 Cy 分子和 Ych 的键或分子,Cy 是与其他分子相连的分子,使 ECC 聚合物具有结晶性、
或
(b) 构成骨架末端单元的一部分,末端单元具有下式 (2)
-Yterm- b-Cy (2)
其中 Yterm 是位于骨架末端的分子,b 和 Cy 如式(1)中所定义;
(B) 其中至少 50%(按重量计)的 Cy 分子存在于式(2)的末端单元中;以及
(C) 其结晶熔化温度 Tp 至少为 0℃,Cy 分子结合产生的 ΔH 至少为 3J/g。