CN113717629A - 基于氨基化磷烯的水性聚氨酯阻燃涂料及其制备方法 - Google Patents

基于氨基化磷烯的水性聚氨酯阻燃涂料及其制备方法 Download PDF

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CN113717629A
CN113717629A CN202111079394.0A CN202111079394A CN113717629A CN 113717629 A CN113717629 A CN 113717629A CN 202111079394 A CN202111079394 A CN 202111079394A CN 113717629 A CN113717629 A CN 113717629A
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刘声泉
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Guangdong Herun New Material Co ltd
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Abstract

本发明涉及阻燃涂料技术领域,具体涉及基于氨基化磷烯的水性聚氨酯阻燃涂料及其制备方法,该水性聚氨酯阻燃涂料通过如下原料反应得到:至少一种含水分散基团的聚合二元醇;至少一种脂肪族的二异氰酸酯;至少一种羧酸型亲水二元醇;一种合成水性聚氨酯用催化剂;至少一种中和剂;氨基化磷烯。该水性聚氨酯阻燃涂料具有优异的阻燃性能。

Description

基于氨基化磷烯的水性聚氨酯阻燃涂料及其制备方法
技术领域
本发明涉及阻燃涂料技术领域,具体涉及基于氨基化磷烯的水性聚氨酯阻燃涂料及其 制备方法。
背景技术
随着生产力的发展和人们生活水平的不断提高,塑料、棉纤维、人造纤维、木材等材 料越来越多的被应用于生活中的各个方面。但是,由于这些材料都具有易燃的特点,因此 在被广泛使用的同时,也容易引发火灾,存在安全隐患。
近年来,国家对于消防安全的监督日益严格,市场对于阻燃材料的需求也在日益增长, 如何有效提升材料的阻燃性能成为了目前最为关注的问题之一。通常来说,提升材料的阻 燃性能主要有三种途径:(1)通过共混的方式把阻燃剂掺杂在材料中,具有低成本和高效 率的特点。但是,这种方法只适用于热塑性材料,并且将阻燃剂掺杂到材料中会影响材料 的拉伸模量和弹性模量。(2)通过化学反应为材料引入具有阻燃性能的基团,但是这种方 法不适用于木材、棉纤维、纺织品等材料,并且阻燃基团的引入会引起材料熔点、密度、 玻璃化转变温度等物理性能的改变。(3)使用阻燃涂料在材料的表面形成阻燃涂层,既不 会影响材料的物理性能,同时具有防水、抗菌、美化修饰等功能。
但是,目前常用的阻燃涂料是溶剂型阻燃涂料,不但在使用过程中会产生VOCs,而且在储存和运输过程中存在易燃易爆的风险。为了解决溶剂型阻燃涂料存在的缺陷,中国专利CN201410804817.4公开了含磷水性聚氨酯树脂透明防火涂料及制备方法,其通过分子设计采用含磷单体合成在聚氨酯树脂分子链上含有阻燃元素磷的聚氨酯树脂,并将含磷聚氨酯树脂水性化,制备得到含磷水性聚氨酯树脂透明防火涂料。该方法虽然达到了环保要求,且不易燃易爆,但是其阻燃效果较差,从而限制了其使用。
发明内容
本发明的目的之一在于针对现有技术的不足,提供一种阻燃效果优异的基于氨基化磷 烯的水性聚氨酯阻燃涂料。
本发明的目的之二在于针对现有技术的不足,提供一种基于氨基化磷烯的水性聚氨酯 阻燃涂料的制备方法。
为实现上述目的之一,本发明采用如下技术方案:
基于氨基化磷烯的水性聚氨酯阻燃涂料,通过如下原料制备得到:
(A)由如下原料形成的二异氰酸酯封端的预聚物
至少一种含水分散基团的聚合二元醇;
至少一种脂肪族的二异氰酸酯,其与聚合二元醇的摩尔比为1.5~2:1;
至少一种羧酸型亲水二元醇,其与聚合二元醇的摩尔比为0.3~0.6:1;
一种合成水性聚氨酯用催化剂,加入量为二异氰酸酯封端的预聚物质量的0.01~0.02%;
(B)由以下原料中和二异氰酸酯封端的预聚物
至少一种中和剂,其与羧酸型亲水二元醇的摩尔比为0.8~1.2:1;
(C)由以下原料对中和后的二异氰酸酯封端的预聚物进行扩链
氨基化磷烯,所需量为使异氰酸酯基反应完全。
上述技术方案中,所述聚合二元醇为分子量为1000~2000的聚丙二醇、聚四氢呋喃醚 二醇、聚ε-己内酯二元醇、聚碳酸酯二元醇、聚己二酸乙二醇酯二元醇和聚己二酸-1,4- 丁二醇酯二醇中的一种或多种的组合。
上述技术方案中,所述脂肪族的二异氰酸酯为异佛尔酮二异氰酸酯、六亚甲基二异氰 酸酯和环己烷二亚甲基二异氰酸酯中的一种或多种的组合。
上述技术方案中,所述羧酸型亲水二元醇为二羟甲基丙酸、二羟甲基丁酸和二羟基丁 二酸中的一种或多种的组合。
上述技术方案中,所述催化剂为叔丁基锡、二月桂酸二丁基锡或有机铋催化剂。
上述技术方案中,所述中和剂为三乙胺、三丙胺、三乙醇胺、二乙烯三胺和二甲基乙 醇胺中的一种或多种的组合。
上述技术方案中,所述氨基化磷烯由胺类物质和黑磷晶体经球磨得到。
为实现上述目的之二,本发明采用如下技术方案:
基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,包括以下步骤:
步骤一、将胺类物质溶解在脱氧去离子水中,加入黑磷晶体,使用球磨机进行球磨获 得粗产物,随后将粗产物用磨砂机继续研磨获得小粒径的氨基化磷烯产物,再经离心分离、 乙醇和脱氧去离子水洗涤、干燥至恒重,即得氨基化磷烯粉末;
步骤二、将配方量的聚合二元醇、羧酸型亲水二元醇真空加热、除水,然后加入配方 量的脂肪族的二异氰酸酯和催化剂进行反应,生成二异氰酸酯封端的预聚物;
步骤三、向步骤二得到的二异氰酸酯封端的预聚物中加入配方量的中和剂中和成盐, 形成中和后的二异氰酸酯封端的预聚物;
步骤四、向步骤三得到的中和后的二异氰酸酯封端的预聚物中加入一部分氨基化磷烯 粉末的水溶液,进行第一次扩链,得到其乳液;
步骤五、向步骤四得到的乳液中滴加剩余的氨基化磷烯粉末的水溶液,进行第二次扩 链,使剩余的异氰酸酯基反应完全,即得所述基于氨基化磷烯的水性聚氨酯阻燃涂料。
上述技术方案中,所述步骤一中,所述胺类物质与所述黑磷晶体的质量比为40~60:1, 所述胺类物质为尿素、氯化铵、三聚氰胺中的至少一种;
所述球磨时间为20~24h,所述研磨时间为3~5h,所述干燥温度为50~80℃。
上述技术方案中,所述步骤二中,真空加热温度为100~120℃,反应温度为75~85℃, 反应时间为3~4h。
上述技术方案中,所述步骤三中,中和反应温度为25~35℃,中和反应时间为30~40min。
上述技术方案中,第一次扩链和第二次扩链的反应温度均是10~20℃,反应时间均是 30~60min,第一次扩链和第二次扩链使用的氨基化磷烯粉末的质量比为1-2:3-4。
本发明的有益效果:
本发明通过氨基化磷烯对中和后的二异氰酸酯封端的预聚物进行扩链,从而在水性聚 氨酯阻燃涂料中引入黑磷,达到了V0的阻燃效果;并且该水性聚氨酯阻燃涂料不添加任 何有机溶剂,符合环保要求,且无易燃易爆的风险。
具体实施方式
为了使本发明所解决的技术问题、技术方案及有益效果更加清楚明白,以下结合实施 例,对本发明进行进一步详细说明。应当理解,此处所描述的具体实施例仅用以解释本发 明,并不用于限定本发明。
基于氨基化磷烯的水性聚氨酯阻燃涂料,通过如下原料制备得到:
(A)由如下原料形成的二异氰酸酯封端的预聚物
至少一种含水分散基团的聚合二元醇,具体选择为分子量为1000~2000的聚丙二醇、 聚四氢呋喃醚二醇、聚ε-己内酯二元醇、聚碳酸酯二元醇、聚己二酸乙二醇酯二元醇和聚 己二酸-1,4-丁二醇酯二醇中的一种或多种的组合;
至少一种脂肪族的二异氰酸酯,具体为异佛尔酮二异氰酸酯、六亚甲基二异氰酸酯和 环己烷二亚甲基二异氰酸酯中的一种或多种的组合,其与聚合二元醇的摩尔比为1.5~2:1;
至少一种羧酸型亲水二元醇,具体为二羟甲基丙酸、二羟甲基丁酸和二羟基丁二酸中 的一种或多种的组合,其与聚合二元醇的摩尔比为0.3~0.6:1;
一种合成水性聚氨酯用催化剂,具体为叔丁基锡、二月桂酸二丁基锡或有机铋催化剂, 加入量为二异氰酸酯封端的预聚物质量的0.01~0.02%;
(B)由以下原料中和二异氰酸酯封端的预聚物
至少一种中和剂,具体为三乙胺、三丙胺、三乙醇胺、二乙烯三胺和二甲基乙醇胺中 的一种或多种的组合,其与羧酸型亲水二元醇的摩尔比为0.8~1.2:1;
(C)由以下原料对中和后的二异氰酸酯封端的预聚物进行扩链
氨基化磷烯,由胺类物质和黑磷晶体经球磨得到,所需量为使异氰酸酯基反应完全。
上述基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,包括以下步骤:
步骤一、将胺类物质溶解在脱氧去离子水中,加入黑磷晶体,使用球磨机进行球磨20~24h获得粗产物,所述胺类物质与所述黑磷晶体的质量比为40~60:1(优选为50:1),随后将粗产物用磨砂机继续研磨3~5h获得小粒径的氨基化磷烯产物,再经离心分离、乙醇和脱氧去离子水洗涤、50~80℃干燥至恒重,即得氨基化磷烯粉末;所述胺类物质为尿素、氯化铵、三聚氰胺中的至少一种,优选为尿素;
反应机理如下:
Figure RE-GDA0003327069920000041
步骤二、将配方量的聚合二元醇、羧酸型亲水二元醇100~120℃(优选120℃)真空加 热、除水,然后加入配方量的脂肪族的二异氰酸酯和催化剂在75~85℃进行反应3~4h(优 选85℃反应3h),生成二异氰酸酯封端的预聚物;
反应机理如下:
聚合二元醇和羧酸型亲水二元醇中的羟基(-OH)与脂肪族的二异氰酸酯中的异氰酸 酯基(-NCO)通过缩合反应生成氨基酯结构(-NH-CO-O-),从而生成异氰酸酯基封端的聚合物链。
Figure BDA0003263335080000042
步骤三、向步骤二得到的二异氰酸酯封端的预聚物中加入配方量的中和剂在25~35℃ 中和反应30~40min成盐,形成中和后的二异氰酸酯封端的预聚物;
反应机理如下:
加入中和剂,将羧基(-COOH)中和为羧基阴离子(-COO-)便于以后的乳化。
Figure BDA0003263335080000051
步骤四、向步骤三得到的中和后的二异氰酸酯封端的预聚物中加入一部分氨基化磷烯 粉末的水溶液,在10~20℃进行第一次扩链30~60min,得到其乳液;
步骤五、向步骤四得到的乳液中滴加剩余的氨基化磷烯粉末的水溶液,在10~20℃进 行第二次扩链30~60min,使剩余的异氰酸酯基反应完全,即得所述基于氨基化磷烯的水性 聚氨酯阻燃涂料;第一次扩链和第二次扩链使用的氨基化磷烯粉末的质量比为1-2:3-4。
扩链反应机理如下:
利用BP-NH2上的NH2与端基NCO反应生成脲基(-NH-CO-NH)从而将具有良好阻 燃效果的黑磷通过共价键的方式键合到聚氨酯上,最后再进行乳化即可。
Figure BDA0003263335080000052
本发明制备得到的基于氨基化磷烯的水性聚氨酯阻燃涂料的阻燃机理可分为两个阶 段:第一燃烧阶段低于450℃,由于黑磷晶体具有显著的耐热性,从而可以依靠黑磷的蜂 窝结构来延迟传热并发挥物理热障效应。第二燃烧阶段为高于450℃,阻燃过程可以细分 为气相和凝聚相阻燃两部分,一方面,黑磷被分解为P·,能够有效捕获燃烧过程中的自由基(如H·和OH·自由基),降低其浓度和含量,起到气相阻燃作用;另一方面,黑磷与 氧气一起燃烧生成PxOy,再进一步反应能够生成磷酸衍生物以促进炭层的形成,生成的炭 层可以起到隔离可燃气体、热量的扩散和侵入的作用,从而起到良好的阻燃效果。
实施例1
基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,包括以下步骤:
(1)将100g尿素溶解在300mL脱氧去离子水中,加入2g黑磷晶体,使用行星式球 磨机球磨24h获得粗产物,随后将球磨的粗产物用磨砂机继续研磨4h获得粒径较小的氨 基化磷烯产物,最后将所得产物离心分离,并用乙醇和脱氧去离子水洗涤3次,将沉淀置 于真空干燥箱中60℃干燥至恒重,即可获得氨基化磷烯粉末;
(2)将40g(40mmol)分子量为1000的聚四氢呋喃醚二醇、2g(15mmol)二羟甲 基丁酸在反应釜中120℃下真空脱水。停真空脱水后,降温到60℃,加入二月桂酸二丁基 锡催化剂和22g异佛尔酮二异氰酸酯(100mmol),升温至85℃,反应3h;
(3)降温至50℃,向步骤(2)产物中加入1.4g(14mmol)三乙胺中和反应30min;
(4)继续降温至35℃以下,将溶有0.2g氨基化磷烯的水溶液加入到反应釜中乳化、扩链30min;
(5)再加入含有0.3g氨基化磷烯的水溶液进行二次扩链1h,降至室温,得到基于氨基化磷烯的水性聚氨酯阻燃涂料。
实施例2
基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,包括以下步骤:
(1)将50g尿素溶解在150mL脱氧去离子水中,加入1g黑磷晶体,使用行星式球 磨机球磨20h获得粗产物,随后将球磨的粗产物用磨砂机继续研磨5h获得粒径较小的氨 基化磷烯产物。最后将所得产物离心分离,并用乙醇和脱氧去离子水洗涤2次,将沉淀置 于真空干燥箱中80℃干燥至恒重,即可获得氨基化磷烯粉末;
(2)将5g聚四氢呋喃醚二醇(分子量1000)、5g聚ε-己内酯二元醇(分子量1000)、0.45g二羟甲基丁酸在反应釜中110℃下真空脱水,然后降温到60℃,加入二月桂酸二丁 基锡催化剂和5.5g异佛尔酮二异氰酸酯,升温至85℃,反应3h;
(3)降温至45℃,向步骤(2)产物中加入0.25g二乙烯三胺中和反应30min;
(4)继续降温至30℃以下,将溶有0.1g氨基化磷烯的水溶液加入到反应釜中乳化、扩链60min;
(5)再加入含有0.4g氨基化磷烯的水溶液进行二次扩链1h,降至室温,得到基于氨基化磷烯的水性聚氨酯阻燃涂料。
实施例3
本实施例的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,主要技术方案与实施 例1相同,在本实施例中未解释的特征,采用实施例1中的解释,在此不再进行赘述。本实施例与实施例1的区别在于:步骤(1)中将80g尿素溶解在240mL脱氧去离子水中, 加入2g黑磷晶体,即尿素与黑磷的质量比为40:1。
实施例4
本实施例的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,主要技术方案与实施 例1相同,在本实施例中未解释的特征,采用实施例1中的解释,在此不再进行赘述。本实施例与实施例1的区别在于:步骤(1)中将120g尿素溶解在360mL脱氧去离子水中, 加入2g黑磷晶体,即尿素与黑磷的质量比为60:1。
实施例5
本实施例的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,主要技术方案与实施 例1相同,在本实施例中未解释的特征,采用实施例1中的解释,在此不再进行赘述。本实施例与实施例1的区别在于:步骤(2)中真空脱水的温度为110℃。
实施例6
本实施例的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,主要技术方案与实施 例1相同,在本实施例中未解释的特征,采用实施例1中的解释,在此不再进行赘述。本实施例与实施例1的区别在于:步骤(2)中真空脱水的温度为100℃。
实施例7
本实施例的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,主要技术方案与实施 例1相同,在本实施例中未解释的特征,采用实施例1中的解释,在此不再进行赘述。本实施例与实施例1的区别在于:步骤(2)中反应条件为80℃反应3.5h。
实施例8
本实施例的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,主要技术方案与实施 例1相同,在本实施例中未解释的特征,采用实施例1中的解释,在此不再进行赘述。本实施例与实施例1的区别在于:步骤(2)中反应条件为75℃反应4h。
对比例1
中国专利CN201410804817.4制备的含磷水性聚氨酯树脂透明防火涂料。
将实施例1-8和对比例1的水性聚氨酯阻燃涂料分别涂覆在尺寸、材质均相同的木材 表面,且涂覆量相同,然后分别对各木材进行长达10秒的点燃,观察实施例1-8和对比例1的阻燃效果,如表1所示。
表1
火焰熄灭时间 木材是否有损坏 阻燃等级
实施例1 5秒熄灭 木材完好,无燃烧物掉落 V0
实施例2 13秒熄灭 木材完好,无燃烧物掉落 V0
实施例3 25秒熄灭 木材完好,无燃烧物掉落 V0
实施例4 30秒熄灭 木材完好,无燃烧物掉落 V0
实施例5 11秒熄灭 木材完好,无燃烧物掉落 V0
实施例6 15秒熄灭 木材完好,无燃烧物掉落 V0
实施例7 20秒熄灭 木材完好,无燃烧物掉落 V0
实施例8 22秒熄灭 木材完好,无燃烧物掉落 V0
对比例1 120秒熄灭 木材损坏严重,有较多燃烧物掉落 V2
由表1可知,本发明制得的水性聚氨酯阻燃涂料相较于现有技术中的水性聚氨酯阻燃 涂料具有更加优异的阻燃效果,且实施例1的制备条件制备得到的水性聚氨酯阻燃涂料的 阻燃性能最好。
最后应当说明的是,以上实施例仅用以说明本发明的技术方案,而非对本发明保护范 围的限制,尽管参照较佳实施例对本发明作了详细地说明,本领域的普通技术人员应当理 解,可以对本发明的技术方案进行修改或者等同替换,而不脱离本发明技术方案的实质和 范围。

Claims (10)

1.基于氨基化磷烯的水性聚氨酯阻燃涂料,其特征在于,通过如下原料制备得到:
(A)由如下原料形成的二异氰酸酯封端的预聚物
至少一种含水分散基团的聚合二元醇;
至少一种脂肪族的二异氰酸酯,其与聚合二元醇的摩尔比为1.5~2:1;
至少一种羧酸型亲水二元醇,其与聚合二元醇的摩尔比为0.3~0.6:1;
一种合成水性聚氨酯用催化剂,加入量为二异氰酸酯封端的预聚物质量的0.01~0.02%;
(B)由以下原料中和二异氰酸酯封端的预聚物
至少一种中和剂,其与羧酸型亲水二元醇的摩尔比为0.8~1.2:1;
(C)由以下原料对中和后的二异氰酸酯封端的预聚物进行扩链
氨基化磷烯,所需量为使异氰酸酯基反应完全。
2.根据权利要求书1所述的基于氨基化磷烯的水性聚氨酯阻燃涂料,其特征在于:所述聚合二元醇为分子量为1000~2000的聚丙二醇、聚四氢呋喃醚二醇、聚ε-己内酯二元醇、聚碳酸酯二元醇、聚己二酸乙二醇酯二元醇和聚己二酸-1,4-丁二醇酯二醇中的一种或多种的组合。
3.根据权利要求书1所述的基于氨基化磷烯的水性聚氨酯阻燃涂料,其特征在于:所述脂肪族的二异氰酸酯为异佛尔酮二异氰酸酯、六亚甲基二异氰酸酯和环己烷二亚甲基二异氰酸酯中的一种或多种的组合。
4.根据权利要求书1所述的基于氨基化磷烯的水性聚氨酯阻燃涂料,其特征在于:所述羧酸型亲水二元醇为二羟甲基丙酸、二羟甲基丁酸和二羟基丁二酸中的一种或多种的组合。
5.根据权利要求书1所述的基于氨基化磷烯的水性聚氨酯阻燃涂料,其特征在于:所述催化剂为叔丁基锡、二月桂酸二丁基锡或有机铋催化剂;
所述中和剂为三乙胺、三丙胺、三乙醇胺、二乙烯三胺和二甲基乙醇胺中的一种或多种的组合。
6.根据权利要求书1所述的基于氨基化磷烯的水性聚氨酯阻燃涂料,其特征在于:所述氨基化磷烯由胺类物质和黑磷晶体经球磨得到。
7.权利要求1-6任意一项所述的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,其特征在于,包括以下步骤:
步骤一、将胺类物质溶解在脱氧去离子水中,加入黑磷晶体,使用球磨机进行球磨获得粗产物,随后将粗产物用磨砂机继续研磨获得小粒径的氨基化磷烯产物,再经离心分离、乙醇和脱氧去离子水洗涤、干燥至恒重,即得氨基化磷烯粉末;
步骤二、将配方量的聚合二元醇、羧酸型亲水二元醇真空加热、除水,然后加入配方量的脂肪族的二异氰酸酯和催化剂进行反应,生成二异氰酸酯封端的预聚物;
步骤三、向步骤二得到的二异氰酸酯封端的预聚物中加入配方量的中和剂中和成盐,形成中和后的二异氰酸酯封端的预聚物;
步骤四、向步骤三得到的中和后的二异氰酸酯封端的预聚物中加入一部分氨基化磷烯粉末的水溶液,进行第一次扩链,得到其乳液;
步骤五、向步骤四得到的乳液中滴加剩余的氨基化磷烯粉末的水溶液,进行第二次扩链,使剩余的异氰酸酯基反应完全,即得所述基于氨基化磷烯的水性聚氨酯阻燃涂料。
8.根据权利要求7所述的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,其特征在于:所述步骤一中,所述胺类物质与所述黑磷晶体的质量比为40~60:1,所述胺类物质为尿素、氯化铵、三聚氰胺中的至少一种;
所述球磨时间为20~24h,所述研磨时间为3~5h,所述干燥温度为50~80℃。
9.根据权利要求7所述的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,其特征在于:所述步骤二中,真空加热温度为100~120℃,反应温度为75~85℃,反应时间为3~4h;
所述步骤三中,中和反应温度为25~35℃,中和反应时间为30~40min。
10.根据权利要求7所述的基于氨基化磷烯的水性聚氨酯阻燃涂料的制备方法,其特征在于:第一次扩链和第二次扩链的反应温度均是10~20℃,反应时间均是30~60min,第一次扩链和第二次扩链使用的氨基化磷烯粉末的质量比为1-2:3-4。
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