CN104277193B - 聚氨酯涂料的制备方法 - Google Patents

聚氨酯涂料的制备方法 Download PDF

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CN104277193B
CN104277193B CN201410602684.2A CN201410602684A CN104277193B CN 104277193 B CN104277193 B CN 104277193B CN 201410602684 A CN201410602684 A CN 201410602684A CN 104277193 B CN104277193 B CN 104277193B
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季利宏
董娜
王伟民
高筱刚
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Hebei Golden Industry Coating Technology Co ltd
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Abstract

本发明公开了一种涂料的制备方法,在二月桂酸二丁基锡催化剂存在的条件下,将二元醇与六亚甲基二异氰酸酯混合,于70~90℃下反应1.0~3.0h,得到聚氨酯预聚体;向聚氨酯预聚体中加入亲水扩链剂、羟基硅烷和有机溶剂,于65~95℃条件下反应1.5~3.5h,加入含氮化合物于65~85℃反应1~3h,按COOH/NH2的摩尔比为0.6:1~1.2:1的比例,加入三乙胺进行中和反应30~70min,加水进行乳化,形成一种阻燃性涂料。所制备的阻燃性涂料环保、价格低廉,能满足市场需求。

Description

聚氨酯涂料的制备方法
本申请是分案申请,原申请的申请号: 201310094271.3,申请日:2013-03-22,发明名称:一种阻燃性涂料的制备方法
技术领域
本发明涉及一种涂料的制备方法,特别涉及一种阻燃性涂料的制备方法。
背景技术
水性聚氨酯作为涂料一个重要研究方向,其(又称水基聚氨酯)是一种在聚氨酯的分子链中含有亲水性基团的聚氨酯树脂,与水具有很强的亲和性,采用特定的工艺能使之在水中分散并形成稳定的体系。水性聚氨酯主要应用于皮革涂饰、纺织印染、造纸业、建筑涂料、胶粘剂等方面,所涉及的几乎都是易燃材料,这些材料在使用时如未经阻燃处理,必然成为引发火灾的安全隐患。水性聚氨酯的阻燃化,是水性聚氨酯功能化的重要方向之一。
发明内容
本发明实际要解决的技术问题是提供一种阻燃性水性聚氨酯涂料。
为了解决上述技术问题,本发明采用了以下技术方案。
(1)、在二月桂酸二丁基锡催化剂存在的条件下,按NCO/OH 的摩尔比为1.5:1~4.5:1,将二元醇与六亚甲基二异氰酸酯混合,于70~90℃下反应1.0~3.0h,得到聚氨酯预聚体A;所述催化剂用量为二元醇与六亚甲基二异氰酸酯总重量的0.5~0.9%;
(2)、向产物A中加入羧基含量为产物A重量1.5~3.5%的亲水扩链剂、产物A重量10.5~15.5%的羟基硅烷和产物A重量10~20%的有机溶剂,于65~95℃条件下反应1.5~3.5h,得产物B;
(3)、再往B中加入含氮化合物为产物A重量的2~6%,于65~85℃反应1~3h,按COOH/NH2 的摩尔比为0.6:1~1.2:1的比例,加入三乙胺进行中和反应30~70min,加水进行乳化,得到产物C,即为阻燃性涂料;
二元醇为水合氯醛、正丁基双(羟丙基)氧化膦中的任意一种;亲水扩链剂为马来酸、丁二酸、乙二酸中的任意一种;羟基硅烷数均分子量为600~1000g/mol;有机溶剂为吡啶、环己酮、N,N-二甲基乙酰胺中的任意一种;含氮化合物为二羟基二甲基三聚氰胺、二乙醇胺中的任意一种。
本发明具有以下特点:
(1)以阻燃性二元醇取代传统合成聚氨酯预聚体的二元醇,并发挥硅、氮、氯或硅、氮、磷协同作用,提高涂料阻燃性;
(2)以吡啶、环己酮、N,N-二甲基乙酰胺取代传统的聚氨酯的有机溶剂N,N-二甲基甲酰胺,制备工艺简单;
具体实施方式
下面结合实例进一步说明本发明。
实例一
(1)、在装有搅拌浆、温度计、冷凝管的500ml的四口烧瓶中,将水合三氯乙醛16.5g与六亚甲基二异氰酸酯33.3g混合,在二月桂酸二丁基锡催化剂0.249g存在的条件下,于70℃下反应1 h,得到49.9g聚氨酯预聚体A;
(2)、向产物A中加入亲水扩链剂马来酸0.96g、数均分子量为600 g/mol羟基硅烷5.24g和吡啶4.99g,于65℃条件下反应1.5 h,得产物B;
(3)、再往产物B中加入二羟基二甲基三聚氰胺1.0g,于65℃反应1h,加入三乙胺2.79g进行中和反应30 min,加水140g进行乳化形成202.2g阻燃性聚氨酯C。
实例二
(1)、在装有搅拌浆、温度计、冷凝管的500ml的四口烧瓶中,将正丁基双(羟丙基)氧化膦22.2g与六亚甲基二异氰酸酯75.6g混合,在二月桂酸二丁基锡催化剂0.88g存在的条件下,于90℃下反应3 h,得97.6g聚氨酯预聚体A;
(2)、向产物A中加入丁二酸4.48g、数均分子量为1000 g/mol羟基硅烷15.1g和环己酮19.5g,于95℃条件下反应3.5 h,得产物B;
(3)、再往产物B中加入二乙醇胺5.86g,反应温度85℃,反应时间3h,加入三乙胺6.39g进行中和反应70 min,加水130g进行乳化,形成275g阻燃性聚氨酯C。
实例三
(1)、在装有搅拌浆、温度计、冷凝管的500ml的四口烧瓶中,将水合三氯乙醛16.5g与六亚甲基二异氰酸酯66.6g混合,在二月桂酸二丁基锡催化剂0.58g存在的条件下,于80℃下反应2 h,得到83g聚氨酯预聚体A;
(2)、向产物A中加入乙二酸1.66g、数均分子量为800 g/mol羟基硅烷10.8g和N,N-二甲基乙酰胺12.5g,于75℃条件下反应2.5 h,得产物B;
(3)、再往B中加入二羟基二甲基三聚氰胺3.32g,反应温度75℃,反应时间2h,加入三乙胺4.1g进行中和反应50 min,加水140g进行乳化,形成245.9g阻燃性聚氨酯C;
表一和表二是本发明实例二所制备涂料所成膜所得性能指标。
膜阻燃性是通过烟密度法(最大烟密度、达到最大烟密度时间)、氧指数、垂直燃烧指标(有焰燃烧时间、无焰燃烧时间)来衡量,断裂伸长率表征其力学性能,表一是实例二所得聚氨酯乳液与市场上的阻燃性聚氨酯SPUA-352性能对比。
表一 阻燃性涂料膜阻燃效果指标
表一各项指标的检测分别依据如下标准:烟密度依据GB8323-2008来测定;氧指数采用GB/T5454-1997《纺织品 燃烧性能试验-氧指数法》测定;有焰燃烧时间和无焰燃烧时间是由GB/T 5455-1997《纺织品燃烧能试验-垂直法》来测定。
由表一可知,本发明阻燃性涂料膜点燃后,最大烟密度显著降低,达到最大烟密度时间显著延长,氧指数明显提高,燃烧时间明显缩短。
表二 阻燃性涂料膜所得断裂伸长率
表二中指标的检测方法参考(蒋维祺.皮革成品理化检验[M].中国轻工业出版社,1999,82~96),本发明阻燃性涂料所得膜断裂伸长率比市场阻燃性能最好的SPUA-352所成膜的断裂伸长率大。

Claims (1)

1.一种涂料的制备方法,其特征在于包括:
(1)、将正丁基双(羟丙基)氧化膦22.2g与六亚甲基二异氰酸酯75.6g混合,在二月桂酸二丁基锡催化剂0.88g存在的条件下,于90℃下反应3h,得产物A;
(2)、向产物A中加入丁二酸4.48g、数均分子量为1000g/mol羟基硅烷15.1g和环己酮19.5g,于95℃条件下反应3.5h,得产物B;
(3)、往产物B中加入二乙醇胺5.86g,反应温度85℃,反应时间3h,加入三乙胺6.39g进行中和反应70min,加水130g进行乳化,形成涂料。
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