CN115067328A - 一种低熔点原药的悬浮剂及其制备方法 - Google Patents
一种低熔点原药的悬浮剂及其制备方法 Download PDFInfo
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Abstract
本发明提供了一种低熔点原药的悬浮剂及其制备方法,属于农药制剂技术领域。本发明采用聚醚、二乙醇胺对氨基磺酸盐进行改性处理,得到一种高分散、高稳定性的改性分散剂。将该改性分散剂用于低熔点原药的制备中,通过和润湿剂等其他助剂的相互配合,降低了低熔点原药的表面张力、加速了低熔点原药的溶解,通过和润湿剂的有力配合,使得制备得到的悬浮剂分散效果好,长时间储存无沉淀、结晶和固化现象,更方便使用。
Description
技术领域
本发明涉及农药制剂技术领域,尤其涉及一种低熔点原药的悬浮剂及其制备方法。
背景技术
随着人们对农药公害问题认识的不断深化,水基制剂受到高度重视,而农药悬浮剂便是水基制剂中最重要的剂型。悬浮剂又称水悬浮剂、胶悬剂、浓缩悬浮剂,其基本原理是在表面活性剂和其他助剂作用下,将不溶或难溶于水的原药分散到水中,形成均匀稳定的粗悬浮体系。
目前,农药悬浮剂的研究有了很大的提高,但是目前生产的多数悬浮剂产品物理稳定性依然较差,储存过程中易发生分层、沉淀、有效成分难以均匀分散甚至结块等问题,影响了悬浮剂在农业生产中的推广和应用。因此,如何得到一种分散稳定、无沉淀、不结晶固化的低熔点原药的悬浮剂及其制备方法,是目前需要解决的技术问题。
发明内容
本发明的目的在于提供一种低熔点原药的悬浮剂及其制备方法,以解决现有悬浮剂易分层、沉淀、分散不均匀的问题。
为了实现上述发明目的,本发明提供以下技术方案:
本发明提供了一种低熔点原药的悬浮剂,由包括以下质量份数的组分组成:
所述改性分散剂的制备方法如下:
将聚醚、二乙醇胺和氨基磺酸盐在催化剂的作用下反应,即得到改性分散剂。
进一步的,所述聚醚、二乙醇胺和氨基磺酸盐的摩尔比为1~1.5:0.5~0.8:1;所述催化剂和氨基磺酸盐的摩尔比为0.1~0.3:1。
进一步的,所述氨基磺酸盐包含2-氨基苯磺酸钠、2-氨基苯磺酸钾、3-氨基苯磺酸钠和3-氨基苯磺酸钾中的一种或几种;所述催化剂包含对甲基苯磺酸和/或磷酸。
进一步的,所述反应的温度为80~120℃,反应的时间为40~60min。
进一步的,所述低熔点原药包含苯醚甲环唑、二甲戊乐灵、毒死蜱、功夫菊酯和氰氟草酯中的一种或几种。
进一步的,所述润湿剂包含羟基聚环氧乙烷嵌段共聚物、非离子型聚醚类嵌段共聚物、蓖麻油聚氧乙烯醚、脂肪醇聚醚、烷基酚聚氧乙烯醚和异构醇醚中的一种或几种。
进一步的,所述消泡剂包含有机硅类消泡剂和/或聚醚类消泡剂;所述增稠剂包含黄原胶、硅酸镁铝和聚氨酯中的一种或几种;所述防冻剂包含乙二醇、丙二醇和丙三醇中的一种或几种。
本发明提供了一种低熔点原药的悬浮剂的制备方法,包括以下步骤:
1)将低熔点原药、第一部分水、润湿剂和改性分散剂混合后加热,得到熔融液;
2)将消泡剂、增稠剂、防冻剂和剩余部分水加入到熔融液中,剪切搅拌形成水乳剂,即为低熔点原药的悬浮剂。
进一步的,所述加热的温度为90~100℃,所述加热的时间为0.5~1.0h;所述第一部分水占水总质量的40~55%。
进一步的,所述剪切搅拌的温度为25~40℃,所述剪切搅拌的转速为1000~5000rpm。
本发明的有益效果:
本发明通过聚醚、二乙醇胺对氨基磺酸盐进行改性处理,使氨基磺酸盐分子主链上接枝聚醚侧链,提供空间位阻,改变其分散作用机理,提高分散剂和稳定性。将改性分散剂用于低熔点悬浮剂的制备中,通过润湿剂对低熔点原药进行润湿处理,降低了低熔点原药的表面张力、加速了低熔点原药的溶解,润湿剂配合改性分散剂,使得到的悬浮剂的分散效果更好,长时间储存无沉淀、结晶和固化现象,相较于市面上购买的农药悬浮剂储存稳定性更好。
具体实施方式
本发明提供了一种低熔点原药的悬浮剂,由包括以下质量份数的组分组成:
所述改性分散剂的制备方法如下:
将聚醚、二乙醇胺和氨基磺酸盐在催化剂的作用下反应,即得到改性分散剂。
在本发明中,所述聚醚的结构通式如下:
H2C=CH2CH2O(CH2CH2CH2O)m(CH2CH2O)nR,其中m为0~10范围内的整数,n为5~15范围内的整数,R为-H、-CH3或-C2H6。
在本发明中,所述聚醚优选为结构式中的一种:
H2C=CH2CH2O(CH2CH2CH2O)5(CH2CH2O)6CH3、
H2C=CH2CH2O(CH2CH2CH2O)2(CH2CH2O)5H、
H2C=CH2CH2O(CH2CH2CH2O)2(CH2CH2O)6CH3、
H2C=CH2CH2O(CH2CH2CH2O)3(CH2CH2O)5C2H6、
H2C=CH2CH2O(CH2CH2CH2O)5(CH2CH2O)10C2H6、
H2C=CH2CH2O(CH2CH2CH2O)8(CH2CH2O)11CH3、
H2C=CH2CH2O(CH2CH2CH2O)10(CH2CH2O)15CH3、
H2C=CH2CH2O(CH2CH2CH2O)3(CH2CH2O)11C2H6。
在本发明中,所述聚醚、二乙醇胺和氨基磺酸盐的摩尔比为1~1.5:0.5~0.8:1,优选为1.1~1.4:0.6~0.7:1,进一步优选为1.2~1.3:0.65:1。
在本发明中,所述催化剂和氨基磺酸盐的摩尔比为0.1~0.3:1,优选为0.2:1。
在本发明中,所述氨基磺酸盐包含2-氨基苯磺酸钠、2-氨基苯磺酸钾、3-氨基苯磺酸钠和3-氨基苯磺酸钾中的一种或几种,优选为2-氨基苯磺酸钠。
在本发明中,所述催化剂包含对甲基苯磺酸和/或磷酸,优选为对甲基苯磺酸。
在本发明中,所述反应的温度为80~120℃,反应的时间为40~60min;优选的,反应的温度为90~110℃,反应的时间为45~55min;进一步优选的,反应的温度为100℃,反应的时间为50min。
在本发明中,所述低熔点原药包含苯醚甲环唑、二甲戊乐灵、毒死蜱、功夫菊酯和氰氟草酯中的一种或几种,优选为苯醚甲环唑、二甲戊乐灵和功夫菊酯中的一种或几种。
在本发明中,所述低熔点原药的熔点为40~95℃,优选为50~90℃。
在本发明中,所述润湿剂包含羟基聚环氧乙烷嵌段共聚物、非离子型聚醚类嵌段共聚物、蓖麻油聚氧乙烯醚、脂肪醇聚醚、烷基酚聚氧乙烯醚和异构醇醚中的一种或几种,优选为羟基聚环氧乙烷嵌段共聚物、非离子型聚醚类嵌段共聚物和蓖麻油聚氧乙烯醚中的一种或几种。
在本发明中,所述消泡剂包含有机硅类消泡剂和/或聚醚类消泡剂,优选为有机硅类消泡剂;所述有机硅类消泡剂优选为SDF-T和/或PX-122;所述聚醚类消泡剂优选为T-350和/或YH-810。
在本发明中,所述增稠剂包含黄原胶、硅酸镁铝和聚氨酯中的一种或几种,优选为黄原胶。
在本发明中,所述防冻剂包含乙二醇、丙二醇和丙三醇中的一种或几种,优选为乙二醇。
本发明提供了一种低熔点原药的悬浮剂的制备方法,包括以下步骤:
1)将低熔点原药、第一部分水、润湿剂和改性分散剂混合后加热,得到熔融液;
2)将消泡剂、增稠剂、防冻剂和剩余部分水加入到熔融液中,剪切搅拌形成水乳剂,即为低熔点原药的悬浮剂。
在本发明中,所述加热的温度为90~100℃,所述加热的时间为0.5~1.0h;优选的,加热的温度为92~98℃,加热的时间为0.6~0.8h;进一步优选的,加热的温度为95℃,加热的时间为0.8h。
在本发明中,所述第一部分水占水总质量的40~55%,优选为45~50%,进一步优选为48%。
在本发明中,所述剪切搅拌的温度为25~40℃,优选为30~35℃,进一步优选为33℃;所述剪切搅拌的转速为1000~5000rpm,优选为2000~3000rpm,进一步优选为2500rpm。
在本发明中,低熔点原药的悬浮液中悬浮粒的粒径为≤8μm,优选为≤5μm。
下面结合实施例对本发明提供的技术方案进行详细的说明,但是不能把它们理解为对本发明保护范围的限定。
实施例1
改性分散剂的制备:
将5.0mol的聚醚、2.5mol的二乙醇胺和1.0mol的对甲基苯磺酸混合后置于反应釜中,加热反应釜至90℃,并加入5.0mol的2-氨基苯磺酸钠,反应1.0h,脱除未反应原料,即得到改性分散剂。(其中聚醚的结构式为:H2C=CH2CH2O(CH2CH2CH2O)5(CH2CH2O)6CH3)
低熔点原药的悬浮剂的制备:
将苯醚甲环唑、30份水、脂肪醇聚醚和上述所得改性分散剂混合后加热至90℃,使混合料熔融得到熔融液;将有机硅类消泡剂、黄原胶、乙二醇和剩余部分水加入至熔融液中,降温至25℃后倒入均质剪切机中,在3000rpm下剪切搅拌形成水乳剂,即为苯醚甲环唑的悬浮剂。
实施例2
改性分散剂的制备:
将7.5mol的聚醚、3.0mol的二乙醇胺和1.0mol的对甲基苯磺酸混合后置于反应釜中,加热反应釜至100℃,并加入5.0mol的2-氨基苯磺酸钠,反应1.0h,脱除未反应原料,即得到改性分散剂。(其中聚醚的结构式为:H2C=CH2CH2O(CH2CH2CH2O)2(CH2CH2O)5H)
低熔点原药的悬浮剂的制备:
将二甲戊乐灵、40份水、蓖麻油聚氧乙烯醚和上述所得改性分散剂混合后加热至95℃,使混合料熔融得到熔融液;将有机硅类消泡剂、硅酸镁铝、乙二醇和剩余部分水加入至熔融液中,降温至30℃后倒入均质剪切机中,在4000rpm下剪切搅拌形成水乳剂,即为二甲戊乐灵的悬浮剂。
实施例3
改性分散剂的制备:
将6.5mol的聚醚、2.8mol的二乙醇胺和1.0mol的磷酸混合后置于反应釜中,加热反应釜至95℃,并加入5.0mol的3-氨基苯磺酸钠,反应50min,脱除未反应原料,即得到改性分散剂。(其中聚醚的结构式为:H2C=CH2CH2O(CH2CH2CH2O)2(CH2CH2O)6CH3)
低熔点原药的悬浮剂的制备:
将功夫菊酯、66份水、烷基酚聚氧乙烯醚和上述所得改性分散剂混合后加热至95℃,使混合料熔融得到熔融液;将有机硅类消泡剂、聚氨酯、丙二醇和剩余部分水加入至熔融液中,降温至40℃后倒入均质剪切机中,在5000rpm下剪切搅拌形成水乳剂,即为功夫菊酯的悬浮剂。
实施例4
改性分散剂的制备:
将5.5mol的聚醚、2.5mol的二乙醇胺和1.0mol的对甲基苯磺酸混合后置于反应釜中,加热反应釜至95℃,并加入5.0mol的3-氨基苯磺酸钠,反应50min,脱除未反应原料,即得到改性分散剂。(其中聚醚的结构式为:H2C=CH2CH2O(CH2CH2CH2O)3(CH2CH2O)5C2H6)
低熔点原药的悬浮剂的制备:
将氰氟草酯、45份水、异构醇醚和上述所得改性分散剂混合后加热至98℃,使混合料熔融得到熔融液;将聚醚类消泡剂、黄原胶、丙二醇和剩余部分水加入至熔融液中,降温至35℃后倒入均质剪切机中,在4500rpm下剪切搅拌形成水乳剂,即为氰氟草酯的悬浮剂。
对比例1
同实施例1,区别在于,所用分散剂为磷酸酯。
对以上实施例1~4和对比例1得到的悬浮剂进行质量检测,检测结果如下表1:
表1实施例1~4和对比例1所得悬浮剂性能检测表
对上述实施例1~4和对比例1所得悬浮剂进行离心稳定性测试:
离心稳定性测试:将上述各实施例和对比例所得悬浮剂各取20mL放置在50mL离心管中,在30min/8000r的条件下进行离心稳定性测试,离心稳定性Sc通过下列方式计算:
表2实施例1~4和对比例1所得悬浮剂的离心稳定性测试结果
由以上实施例可知,本发明提供了一种低熔点原药的悬浮剂及其制备方法,本发明通过采用特定的改性分散剂与其他组分相互配合,得到的低熔点悬浮剂悬浮率高、无结晶、可稳定分散,在离心稳定性测试中,本发明得到的悬浮剂稳定性可高达91%,相较于采用现有的分散剂制备的悬浮剂具有高的稳定性,可保证悬浮剂的使用质量,可在工业上大规模制备。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。
Claims (10)
2.根据权利要求1所述的低熔点原药的悬浮剂,其特征在于,所述聚醚、二乙醇胺和氨基磺酸盐的摩尔比为1~1.5:0.5~0.8:1;所述催化剂和氨基磺酸盐的摩尔比为0.1~0.3:1。
3.根据权利要求1或2所述的低熔点原药的悬浮剂,其特征在于,所述氨基磺酸盐包含2-氨基苯磺酸钠、2-氨基苯磺酸钾、3-氨基苯磺酸钠和3-氨基苯磺酸钾中的一种或几种;所述催化剂包含对甲基苯磺酸和/或磷酸。
4.根据权利要求3所述的低熔点原药的悬浮剂,其特征在于,所述反应的温度为80~120℃,反应的时间为40~60min。
5.根据权利要求1或4所述的低熔点原药的悬浮剂,其特征在于,所述低熔点原药包含苯醚甲环唑、二甲戊乐灵、毒死蜱、功夫菊酯和氰氟草酯中的一种或几种。
6.根据权利要求5所述的低熔点原药的悬浮剂,其特征在于,所述润湿剂包含羟基聚环氧乙烷嵌段共聚物、非离子型聚醚类嵌段共聚物、蓖麻油聚氧乙烯醚、脂肪醇聚醚、烷基酚聚氧乙烯醚和异构醇醚中的一种或几种。
7.根据权利要求1或2或4或6所述的低熔点原药的悬浮剂,其特征在于,所述消泡剂包含有机硅类消泡剂和/或聚醚类消泡剂;所述增稠剂包含黄原胶、硅酸镁铝和聚氨酯中的一种或几种;所述防冻剂包含乙二醇、丙二醇和丙三醇中的一种或几种。
8.权利要求1~7任一项所述低熔点原药的悬浮剂的制备方法,其特征在于,包括以下步骤:
1)将低熔点原药、第一部分水、润湿剂和改性分散剂混合后加热,得到熔融液;
2)将消泡剂、增稠剂、防冻剂和剩余部分水加入到熔融液中,剪切搅拌形成水乳剂,即为低熔点原药的悬浮剂。
9.根据权利要求8所述的制备方法,其特征在于,所述加热的温度为90~100℃,所述加热的时间为0.5~1.0h;所述第一部分水占水总质量的40~55%。
10.根据权利要求8或9所述的制备方法,其特征在于,所述剪切搅拌的温度为25~40℃,所述剪切搅拌的转速为1000~5000rpm。
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CN111109251A (zh) * | 2019-12-18 | 2020-05-08 | 中化化工科学技术研究总院有限公司 | 一种润湿分散剂及利用该助剂的二甲戊灵悬浮剂 |
CN111466372A (zh) * | 2020-04-13 | 2020-07-31 | 南京拓呗新材料科技有限公司 | 一种低泡型农药水悬浮剂专用润湿分散剂及其制备方法 |
CN112825852A (zh) * | 2020-12-30 | 2021-05-25 | 江苏耘农化工有限公司 | 一种低熔点农药水悬浮剂及其制备方法 |
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