CN116694226A - 一种无溶剂型聚氨酯防水涂料及其制备方法 - Google Patents
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Abstract
本发明属于无溶剂型单组份聚氨酯防水涂料技术领域,公开了一种无溶剂型聚氨酯防水涂料及其制备方法,由以下重量份原料制得,22~34份低粘度聚醚多元醇、异氰酸酯5~10份、蓖麻油3~5份、环保植物酯15~20份、滑石粉22~30份和重质碳酸钙15~22份。本发明的有益效果是:蓖麻油可与低粘度聚醚多元醇、异氰酸酯发生反应,生成端基为‑NCO的蓖麻油基聚氨酯预聚体,提高了产物的交联性,使生产出的涂料成膜后防水性和柔韧性增强。环保植物酯代替传统的石蜡增塑剂,粘度小,从而达到不用溶剂达到降低涂料粘度的目的。蓖麻油基聚氨酯预聚体与植物酯相容性好,可均匀的分散在植物酯中。
Description
技术领域
本发明属于无溶剂型单组份聚氨酯防水涂料技术领域,特别涉及一种无溶剂型聚氨酯防水涂料及其制备方法。
背景技术
无溶剂聚氨酯防水涂料是以特殊聚醚多元醇、异氰酸酯为主要材料,配以特制助剂、填料,在全自动化生产设备上经聚合反应而成。涂料施工后吸收空气中湿气反应,固化后形成一层无缝、粘结力强、整体而富有弹性、坚韧的防水胶膜,是环保性优异的聚氨酯防水涂料。
无溶剂聚氨酯防水涂料具有以下优点:环保:无溶剂聚氨酯涂料不含有机溶剂,不会对环境造成污染;耐磨性好:无溶剂聚氨酯涂料具有优异的耐磨性能,可以长期保持涂层的光泽和平滑度;耐腐蚀性好:无溶剂聚氨酯涂料具有优异的耐腐蚀性能,可以有效地防止基材受到腐蚀;适用范围广:无溶剂聚氨酯涂料可以应用于建筑、汽车、船舶等领域,具有广泛的应用前景。
但是无溶剂聚氨酯防水涂料在实际应用中,由于粘度较大,需要加热后才能进行喷涂,对施工工艺要求较高。
发明内容
本发明的目的是提供一种无溶剂型聚氨酯防水涂料及其制备方法,具有涂料粘度适中,在常温环境下也可施工的效果。
本发明的上述技术目的是通过以下技术方案得以实现的:一种无溶剂型聚氨酯防水涂料,由以下重量份原料制得,22~34份低粘度聚醚多元醇、异氰酸酯5~10份、蓖麻油3~5份、环保植物酯15~20份、滑石粉22~30份和重质碳酸钙15~22份。。
本发明的进一步设置为:所述低粘度聚醚多元醇由蔗糖、三乙烯四胺、蓖麻油和环氧丙烷制备而成。
本发明的进一步设置为:按质量份数计包括10份蔗糖,3~5份三乙烯四胺和1~2份蓖麻油。
本发明的进一步设置为:还包括催化剂有机锡和二甲胺。
一种无溶剂型聚氨酯防水涂料制备方法,其特征在于:包括如下步骤:
S1、将10份蔗糖,3~5份三乙烯四胺和1~2份蓖麻油、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115摄氏度,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将22~34份低粘度聚醚多元醇、蓖麻油3~5份加入混合器中,在110~120℃条件下搅拌并抽真空脱水1~2h,随后降温至80~85℃,加入异氰酸酯5~10份,反应2~3h,得到聚氨酯预聚体;
S4、将环保植物酯15~20份、滑石粉22~30份和重质碳酸钙15~22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
本发明的进一步设置为:所述步骤S4中还添加有0.01~0.2份甲苯-2.4-二异氰酸酯。
本发明的有益效果是:
1.蓖麻油可与低粘度聚醚多元醇、异氰酸酯发生反应,生成端基为-NCO的蓖麻油基聚氨酯预聚体,提高了产物的交联性,使生产出的涂料成膜后防水性和柔韧性增强。环保植物酯代替传统的石蜡增塑剂,粘度小,从而达到不用溶剂达到降低涂料粘度的目的。蓖麻油基聚氨酯预聚体与植物酯相容性好,可均匀的分散在植物酯中。
2.采用三乙烯四胺与环氧乙烷聚合制备而成的三乙烯四胺聚醚粘度较低,将蔗糖与三乙烯四胺混合作为起始剂,加入环氧丙烷反应后,可得到蔗糖聚醚和三乙烯四胺聚醚的混合物,三乙烯四胺聚醚可对蔗糖聚醚的粘度进行调节,最终得到低粘度聚醚多元醇,采用低粘度聚醚多元醇与异氰酸酯制备的涂料,粘度较小,便于施工。
3.但是添加三乙烯四胺聚醚后会导致涂料强度不够,防水性减弱,向起始剂中加入蓖麻油,蓖麻油在催化剂的作用下可接枝到三乙烯四胺聚醚中,使三乙烯四胺聚醚呈网状结构,在不影响涂料的粘度的情况下,可提高涂料强度和防水性。
具体实施方式
下面将对实施例中的技术方案进行清楚、完整地描述。显然,所描述的实施例仅仅是本发明的一部分实施例,而不是全部的实施例。基于本发明的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:
S1、将10份蔗糖,5份三乙烯四胺和1份蓖麻油、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115℃,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将34份低粘度聚醚多元醇、蓖麻油3份加入混合器中,在110~120℃条件下搅拌并抽真空脱水2h,随后降温至80~85℃,加入异氰酸酯5份,反应3h,得到聚氨酯预聚体;
S4、将0.01份甲苯-2.4-二异氰酸酯、环保植物酯20份、滑石粉22份和重质碳酸钙22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
实施例2
S1、将10份蔗糖,3份三乙烯四胺和2份蓖麻油、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115℃,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将22份低粘度聚醚多元醇、蓖麻油5份加入混合器中,在110~120℃条件下搅拌并抽真空脱水1h,随后降温至80~85℃,加入异氰酸酯10份,反应2h,得到聚氨酯预聚体;
S4、将0.2份甲苯-2.4-二异氰酸酯、环保植物酯15份、滑石粉30份和重质碳酸钙15份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
实施例3
S1、将10份蔗糖,5份三乙烯四胺、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115℃,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将34份低粘度聚醚多元醇、蓖麻油3份加入混合器中,在110~120℃条件下搅拌并抽真空脱水2h,随后降温至80~85℃,加入异氰酸酯5份,反应3h,得到聚氨酯预聚体;
S4、将0.01份甲苯-2.4-二异氰酸酯、环保植物酯20份、滑石粉22份和重质碳酸钙22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
实施例4
S1、将10份蔗糖和1份蓖麻油、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115℃,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将34份低粘度聚醚多元醇、蓖麻油3份加入混合器中,在110~120℃条件下搅拌并抽真空脱水2h,随后降温至80~85℃,加入异氰酸酯5份,反应3h,得到聚氨酯预聚体;
S4、将0.01份甲苯-2.4-二异氰酸酯、环保植物酯20份、滑石粉22份和重质碳酸钙22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
实施例5
S1、将10份蔗糖,5份三乙烯四胺和1份蓖麻油、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115℃,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将34份低粘度聚醚多元醇份加入混合器中,在110~120℃条件下搅拌并抽真空脱水2h,随后降温至80~85℃,加入异氰酸酯5份,反应3h,得到聚氨酯预聚体;
S4、将0.01份甲苯-2.4-二异氰酸酯、环保植物酯20份、滑石粉22份和重质碳酸钙22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
实施例6
S1、将相对分子质量为3000的聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到脱水聚醚多元醇;
S2、将34份脱水聚醚多元醇、蓖麻油3份加入混合器中,在110~120℃条件下搅拌并抽真空脱水2h,随后降温至80~85℃,加入异氰酸酯5份,反应3h,得到聚氨酯预聚体;
S3、将0.01份甲苯-2.4-二异氰酸酯、环保植物酯20份、滑石粉22份和重质碳酸钙22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
上述实施例1-6中的异氰酸酯均为甲苯-2.4-二异氰酸酯,环保植物酯为市售的成品。
按照实施例1-6中的方法制备无溶剂型聚氨酯防水涂料,并对涂料的粘度和拉伸强度进行检测,性能检测结果如下所示:
从试验数据中可以看出,在合成聚酯多元醇的过程中添加三乙烯四胺,能有效降低涂料粘度,合成聚酯多元醇的过程中添加蓖麻油可同时加强涂料的拉伸强度和断裂延伸率;在采用低粘度聚酯多元醇与异氰酸酯反应生成聚氨酯预聚物的过程中,加入蓖麻油,可同时加强涂料的拉伸强度和断裂延伸率;采用低粘度聚酯多元醇制备的涂料,同时具有低粘度、易施工、强度高的特点。
Claims (6)
1.一种无溶剂型聚氨酯防水涂料,其特征在于:由以下重量份原料制得,22~34份低粘度聚醚多元醇、异氰酸酯5~10份、蓖麻油3~5份、环保植物酯15~20份、滑石粉22~30份和重质碳酸钙15~22份。
2.根据权利要求1所述的一种无溶剂型聚氨酯防水涂料,其特征在于:所述低粘度聚醚多元醇由蔗糖、三乙烯四胺、蓖麻油和环氧丙烷制备而成。
3.根据权利要求2所述的一种无溶剂型聚氨酯防水涂料,其特征在于:按质量份数计包括10份蔗糖,3~5份三乙烯四胺和1~2份蓖麻油。
4.根据权利要求2所述的一种无溶剂型聚氨酯防水涂料,其特征在于:还包括催化剂有机锡和二甲胺。
5.根据权利要求1~4任一项所述的一种无溶剂型聚氨酯防水涂料制备方法,其特征在于:包括如下步骤:
S1、将10份蔗糖,3~5份三乙烯四胺和1~2份蓖麻油、有机锡催化剂和少量去离子水混合均匀制备成起始剂,真空抽入催化剂甲二胺,升温至105℃后投入第一批环氧丙烷,升温至120℃反应。投入氢氧化钾,脱水,当水分小于0.1%时,温度调节至110~115摄氏度,加入第二批环氧丙烷,继续反应至压力恒定,得粗制聚醚多元醇;
S2、将聚酯聚醚多元醇加入中和剂,120℃下搅拌1~2h后加入吸附剂,搅拌后得到低粘度聚醚多元醇;
S3、将22~34份低粘度聚醚多元醇、蓖麻油3~5份加入混合器中,在110~120℃条件下搅拌并抽真空脱水1~2h,随后降温至80~85℃,加入异氰酸酯5~10份,反应2~3h,得到聚氨酯预聚体;
S4、将环保植物酯15~20份、滑石粉22~30份和重质碳酸钙15~22份烘干并混合均匀,向其中加入聚氨酯预聚体,搅拌混合均匀,得到无溶剂型聚氨酯防水涂料。
6.根据权利要求1所述的一种无溶剂型聚氨酯防水涂料制备方法,其特征在于:所述步骤S4中还添加有0.01~0.2份甲苯-2.4-二异氰酸酯。
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