CN107746669B - 实干时间较短的汽车管道涂料 - Google Patents

实干时间较短的汽车管道涂料 Download PDF

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CN107746669B
CN107746669B CN201711166594.3A CN201711166594A CN107746669B CN 107746669 B CN107746669 B CN 107746669B CN 201711166594 A CN201711166594 A CN 201711166594A CN 107746669 B CN107746669 B CN 107746669B
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Abstract

本发明公开了一种实干时间较短的汽车管道涂料,包括以下步骤:将聚丙二醇、季戊四醇置于反应釜中,真空脱水,冷却后加入二羧基半酯、二羟甲基丁酸、二异氰酸酯,在氮气保护下加热后反应1~2.5h,保温后升温,加入聚二甲基硅氧烷继续反应;再加入云母粉、钛白粉、增塑剂、抗氧剂,羟乙基纤维素、过硫酸铵、甲基丙烯酸锌、N‑甲基吡咯烷酮,反应3‑4.5h,加入冰醋酸中和,升温后加入石蜡继续反应,真空脱去溶剂,保温,静置后即得。本发明制得的涂料耐盐水和耐高温效果好,同时外观光滑平整,实干时间短,可广泛用于汽车管道领域,具有良好的市场前景。

Description

实干时间较短的汽车管道涂料
本申请是分案申请,原申请的申请号201510730677.5,申请日2015-11-2,发明创造名称:一种汽车管道涂料的制备方法。
技术领域
本发明涉及涂料领域,特别涉及一种汽车管道涂料的制备方法。
背景技术
当前,我国汽车销量连续突破1800万辆,高速增长的汽车销量有力拉动了汽车涂料涂装业务的持续发展,给汽车涂料行业带来了巨大的商机。
汽车涂料有一下几方面的作用:(1)美化车的外观:要求漆膜丰满,光泽华丽柔和,鲜映性好,色彩多种多样并符合潮流,使其外观看上去更加赏心悦目,给人以美感;(2)极好的施工性和配套性,汽车漆一般系多层涂装,因靠单层涂装一般达不到良好的性能,所以要求各涂层之间附着力好,无缺陷;(3)极好的机械性能,适应汽车的高速、多震和应变,要求漆膜的附着力好、坚硬柔韧、耐冲击、耐弯曲、耐划伤、耐摩擦等性能优越;(4)极好的耐擦洗性、耐污性和良好的可修补性,要求耐毛刷、肥皂、清洗剂清洗,与其他常见的污渍接触后不留痕迹;(5)极好的耐候性耐腐蚀性,能适用于各种温度、曝晒及风雨侵蚀,在各种气候条件下保持不失光、不变色、不起泡、不开裂、不脱落、不粉化、不锈蚀,漆膜的使用寿命一般大于10年。
然而由于汽车的零部件较多,工作环境不同,对其性质要求也不同,尤其是汽车管道使用过程中,由于温度较高,易被腐蚀,容易产生安全隐患。
发明内容
本发明解决的技术问题是,提供一种汽车管道涂料的制备方法,制得的涂料耐盐水和耐高温效果好,同时外观光滑平整,实干时间短,可广泛用于汽车管道领域,具有良好的市场前景。
本发明采用的技术方案是:
一种汽车管道涂料的制备方法,包括以下步骤:
(1)按重量份计,将69-85份聚丙二醇、1-7份季戊四醇置于反应釜中,于100-120℃下真空脱水60-90min,冷却后加入1-8份二羧基半酯、2-7份二羟甲基丁酸、20-32份二异氰酸酯,在氮气保护下加热至60-90℃反应1-2.5h,保温后,升温至100-130℃,加入8-18份聚二甲基硅氧烷继续反应30-50min,得到预聚体;
(2)向步骤(1)所得预聚体中加入2-14份云母粉、4-19份钛白粉、4-16份增塑剂、12-17份抗氧剂,5-10份羟乙基纤维素、2-13份过硫酸铵、0.5-2份甲基丙烯酸锌、38-45份N-甲基吡咯烷酮,在75-85℃下反应3-4.5h,加入冰醋酸中和至pH为5-7后升温至90-110℃,加入7-9份石蜡后继续反应20-35min,真空脱去溶剂,保温15-25min,静置后即得。
优选的,上述步骤(1)真空脱水过程中真空度在0.08~0.05MPa。
优选的,上述步骤(1)中保温时间为10-15min。
优选的,上述步骤(2)中增塑剂为重量份比为1:1-3:1的邻苯二甲酸二异辛酯和癸二酸二丁酯的混合物。
优选的,上述步骤(2)中抗氧剂为抗氧化剂1010或抗氧化剂168。
优选的,上述步骤(2)中石蜡在2-4min内加完。
优选的,上述步骤(2)继续反应过程中,压力为1.2-1.5MPa。
优选的,上述步骤(2)真空脱去溶剂过程中真空度在0.09~0.07MPa。
有益效果:本发明制得的汽车管道涂料外观光滑平整,150℃温度下,经100小时后不起泡,不脱落,经耐盐水实验后不起泡,不脱落,实干时间均<2h;通过组分之间的协同作用和制备过程的改进达到耐盐水和耐高温的效果,同时外观光滑平整,实干时间短,可广泛用于汽车管道领域,具有良好的市场前景。
具体实施方式
实施例1
一种汽车管道涂料的制备方法,包括以下步骤:
(1)按重量份计,将69份聚丙二醇、1份季戊四醇置于反应釜中,于100℃下真空脱水60min,其中真空度在0.08MPa,冷却后加入1份二羧基半酯、2份二羟甲基丁酸、20份二异氰酸酯,在氮气保护下加热至60℃反应1h,保温10min后,升温至100℃,加入8份聚二甲基硅氧烷继续反应30min,得到预聚体;
(2)向步骤(1)所得预聚体中加入2份云母粉、4份钛白粉、2份邻苯二甲酸二异辛酯、2份癸二酸二丁酯、12份抗氧剂1010,5份羟乙基纤维素、2份过硫酸铵、0.5份甲基丙烯酸锌、38份N-甲基吡咯烷酮,在75℃下反应3h,加入冰醋酸中和至pH为5-7后升温至90℃,在2min加入7份石蜡后继续反应20min,压力设置为压力为1.2MPa,真空脱去溶剂,其中真空度0.09MPa,保温15min,静置后即得。
实施例2
一种汽车管道涂料的制备方法,包括以下步骤:
(1)按重量份计,将85份聚丙二醇、7份季戊四醇置于反应釜中,于120℃下真空脱水90min,其中真空度在0.05MPa,冷却后加入8份二羧基半酯、7份二羟甲基丁酸、32份二异氰酸酯,在氮气保护下加热至90℃反应2.5h,保温15min后,升温至130℃,加入18份聚二甲基硅氧烷继续反应50min,得到预聚体;
(2)向步骤(1)所得预聚体中加入14份云母粉、19份钛白粉、12份邻苯二甲酸二异辛酯、4份癸二酸二丁酯、17份抗氧剂168,10份羟乙基纤维素、13份过硫酸铵、2份甲基丙烯酸锌、45份N-甲基吡咯烷酮,在85℃下反应4.5h,加入冰醋酸中和至pH为5-7后升温至110℃,在4min加入9份石蜡后继续反应35min,压力设置为压力为1.5MPa,真空脱去溶剂,其中真空度0.07MPa,保温25min静置后即得。
实施例3
一种汽车管道涂料的制备方法,包括以下步骤:
(1)按重量份计,将75份聚丙二醇、6份季戊四醇置于反应釜中,于110℃下真空脱水75min,其中真空度在0.07MPa,冷却后加入4份二羧基半酯、5份二羟甲基丁酸、24份二异氰酸酯,在氮气保护下加热至70℃反应1-2.5h,保温13min后,升温至120℃,加入14份聚二甲基硅氧烷继续反应40min,得到预聚体;
(2)向步骤(1)所得预聚体中加入8份云母粉、13份钛白粉、8份邻苯二甲酸二异辛酯、4份癸二酸二丁酯、15份抗氧剂168,7份羟乙基纤维素、8份过硫酸铵、1.5份甲基丙烯酸锌、41份N-甲基吡咯烷酮,在80℃下反应4h,加入冰醋酸中和至pH为5-7后升温至105℃,在3min加入8份石蜡后继续反应25min,压力设置为压力为1.3MPa,真空脱去溶剂,其中真空度0.08MPa,保温20min静置后即得。
对比例1
与实施例3的区别是未添加甲基丙烯酸锌。
一种汽车管道涂料的制备方法,包括以下步骤:
(1)按重量份计,将75份聚丙二醇、6份季戊四醇置于反应釜中,于110℃下真空脱水75min,其中真空度在0.07MPa,冷却后加入4份二羧基半酯、5份二羟甲基丁酸、24份二异氰酸酯,在氮气保护下加热至70℃反应1-2.5h,保温13min后,升温至120℃,加入14份聚二甲基硅氧烷继续反应40min,得到预聚体;
(2)向步骤(1)所得预聚体中加入8份云母粉、13份钛白粉、8份邻苯二甲酸二异辛酯、4份癸二酸二丁酯、15份抗氧剂168,7份羟乙基纤维素、8份过硫酸铵、41份N-甲基吡咯烷酮,在80℃下反应4h,加入冰醋酸中和至pH为5-7后升温至105℃,在3min加入8份石蜡后继续反应25min,压力设置为压力为1.3MPa,真空脱去溶剂,其中真空度0.08MPa,保温20min静置后即得。
对比例2
与实施例3的区别是未采用冰醋酸调节pH。
一种汽车管道涂料的制备方法,包括以下步骤:
(1)按重量份计,将75份聚丙二醇、6份季戊四醇置于反应釜中,于110℃下真空脱水75min,其中真空度在0.07MPa,冷却后加入4份二羧基半酯、5份二羟甲基丁酸、24份二异氰酸酯,在氮气保护下加热至70℃反应1-2.5h,保温13min后,升温至120℃,加入14份聚二甲基硅氧烷继续反应40min,得到预聚体;
(2)向步骤(1)所得预聚体中加入8份云母粉、13份钛白粉、8份邻苯二甲酸二异辛酯、4份癸二酸二丁酯、15份抗氧剂168,7份羟乙基纤维素、8份过硫酸铵、1.5份甲基丙烯酸锌、41份N-甲基吡咯烷酮,在80℃下反应4h,升温至105℃,在3min加入8份石蜡后继续反应25min,压力设置为压力为1.3MPa,真空脱去溶剂,其中真空度0.08MPa,保温20min静置后即得。
性能测试:
从上表中可以看出:实施例1-3制得的涂料外观光滑平整,150℃温度下,经100小时后不起泡,不脱落,经耐盐水实验后不起泡,不脱落,实干时间均<2h;对比例1中未添加甲基丙烯酸锌,制得的涂料经耐盐水实验后出现部分气泡;对比例2中未采用冰醋酸调节pH制得的涂料150℃温度下,经100小时后出现部分气泡。由此可知,本发明制得的汽车管道涂料通过组分之间的协同作用和制备过程的改进达到耐盐水和耐高温的效果,同时外观光滑平整,实干时间短,可广泛用于汽车管道领域,具有良好的市场前景。

Claims (1)

1.一种汽车管道涂料,其特征在于该涂料采用的制备方法,包括以下步骤:
(1)按重量份计,将69-85份聚丙二醇、1-7份季戊四醇置于反应釜中,于100-120℃下真空脱水60-90min,冷却后加入1-8份二羧基半酯、2-7份二羟甲基丁酸、20-32份二异氰酸酯,在氮气保护下加热至60-90℃反应1-2.5h,保温后,升温至100-130℃,加入8-18份聚二甲基硅氧烷继续反应30-50min,得到预聚体;
(2)向步骤(1)所得预聚体中加入2-14份云母粉、4-19份钛白粉、4-16份增塑剂、12-17份抗氧剂,5-10份羟乙基纤维素、2-13份过硫酸铵、0.5-2份甲基丙烯酸锌、38-45份N-甲基吡咯烷酮,在75-85℃下反应3-4.5h,加入冰醋酸中和至pH为5-7后升温至90-110℃,加入7-9份石蜡后继续反应20-35min,真空脱去溶剂,保温15-25min静置后即得:
所述步骤(2)中增塑剂为重量份比为1:1-3:1的邻苯二甲酸二异辛酯和癸二酸二丁酯的混合物;
所述步骤(2)中抗氧剂为抗氧化剂168。
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