CN112341928A - 一种水溶性聚氨酯防水涂料及其制备方法 - Google Patents
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Abstract
本发明涉及一种隔热涂料的制备方法,特别是一种水溶性聚氨酯防水涂料及其制备方法,属于化学组合物及其制备技术领域,水溶性聚氨酯防水涂料,其特征在于,制成该涂料包括以下重量份数的原料:聚氨酯预聚体 40 ‑ 50 份;N‑ 羟甲基丙烯酰胺 1‑2 份;邻苯二甲酸二丁酯 3‑9份;高钛粉8‑ 22 份;消泡剂 0.1 ‑ 0.3 份;竹纤维素3 ‑10 份;混合溶剂 9 ‑ 15 份;所述的混合溶剂是木醇‑芥子醇‑对羟基苯木质素与乙二醇丁醚加水的混合物,重量比例为4:3:10,本发明的有益效果是:耐化学性强、耐温高、耐候性好、耐沾污性好、自洁性强的特点,还保证具有反射、隔热、保温作用功能的材料牢固的粘接在涂料中,延长涂料寿命。
Description
技术领域
本发明涉及一种隔热涂料的制备方法,特别是一种水溶性聚氨酯防水涂料及其制备方法,属于化学组合物及其制备技术领域。
背景技术
建筑节能是我国节能工作的重点之一,而外墙外保温已成为建筑节能的主产品。对于热工设计时以保温为主的地区,如严寒地区和寒冷地区,外墙外保温不仅合理,而且适用,发展较快。而对于热工设计时一般只考虑隔热的夏热冬暖地区,或热工设计时以隔热为主的夏热冬冷地区,目前的一些外墙外保温存在进一步完善的空间。针对不同地区的气候特点,合理选择和使用各种隔热保温涂料,组成复合体系,既保温又隔热,达到室内热环境舒适和节能降耗的目的。
而说到隔热保温涂料,人们还要考虑其耐候性和防污性,因为外墙涂料是与外界大气环境直接接触的,需要经受气候、雨水、紫外线等的挑战,因此需要具备耐酸雨、耐沾污以及易清洗等性能, 目前在建筑防水领域,溶剂型聚氨酯涂料(WPU )应用比较广泛, 但随着环保的力度的加大,涂料势必要向无溶剂、水性化方向发展。WPU由于引入亲水集团,涂料的耐水性不佳,无法满足建筑防水涂料的需求,所以可以通过改性来提高和改善相应性能。目前公开文献报道了许多改性方法,例如 CN201310545598.8,公开了一种水性聚氨酯丙烯酸酯、水性聚氨酯紫外光固化涂料及其制备方法,解决了现有技术中水性聚氨酯涂料危害环境、不能进行紫外光固化的技术问题, 但要制备一种具有轻质、高耐火、高耐候、环保、不易老化、长效性的外保温隔热的涂料,进而达到建筑节能的目的,还没有很成熟的技术,因此目前人们还在水性涂料方面还在 不断的研究试验。
发明内容
本发明的目的提供一种水溶性聚氨酯防水涂料及其制备方法,该涂料具有隔热效果好、高耐候、环保、不易老化、长效的效果。
本发明是这样实现的 :水溶性聚氨酯防水涂料,其特征在于,制成该涂料包括以下重量份数的原料 :聚氨酯预聚体 40 - 50 份 ;N- 羟甲基丙烯酰胺 1-2 份 ;邻苯二甲酸二丁酯 3-9份 ;高钛粉8- 22 份 ;消泡剂 0.1 - 0.3 份 ;竹纤维素3 -10 份 ;混合溶剂 9 - 15 份 ;所述的混合溶剂是木醇-芥子醇-对羟基苯木质素与乙二醇丁醚加水的混合物,重量比例为 4:3:10。
所述的消泡剂是甲基硅油。
所述的高钛粉的二氧化钛纯度在97以上%,通过加入高钛粉,能增强光线的折射与散射。因此,具有较优的反射和隔热性能,还具有很好的光线遮盖效果,从而反射太阳近红外波段,提高太阳热辐射反射,降低太阳热吸收,不让太阳在物体表面累计升温。
本发明所述的水溶性聚氨酯防水涂料,其制备方法包括以下步骤 : 将N-羟甲基丙烯酰胺与聚氨酯预聚体在反应釜中混合,反应温度 80-150℃,反应2h后加入邻苯二甲酸二丁酯 、高钛粉 、竹纤维素 ;混合溶剂,混合均匀即可得到水溶性聚氨酯防水涂料产品。
本发明所述的水溶性聚氨酯防水涂料,其原料还包括 :流平剂、抗冻剂和防沉剂中的一种或多种,重量份数为 1-5 ;所述的流平剂是聚丙烯酸酯溶液 ;所述的抗冻剂是1,3- 丙二醇 ;所述的防沉剂是改性聚脲的 N- 甲基吡咯烷酮溶液。
本发明所述的聚氨酯预聚体是以异氰酸酯、聚醚为主要原料,进行聚合而成,带有NCO 端基的预聚体,分子量在 1000-4000 之间,它具有良好的物理性能,粘结力强,常温湿固化。
本发明所述的 N-羟甲基丙烯酰胺,为白色结晶粉末,熔点 74 ~ 75℃, 易溶于水、乙醇,溶于脂肪酸酯类,不溶于烃、卤代烃等疏水性溶剂。当水溶液有酸存在时,加热会迅速聚合成不溶的树脂。由于分子结构中含有聚合性能的乙烯基和缩合性能的羟甲基,因此使线型聚合物交联最为有效。如果与丙烯酸酯类单体共聚合,羟甲基被引入,仅加热即可交联。
本发明所述的邻苯二甲酸二丁酯是一种增塑剂,可使制品具有良好的柔软性,稳定性、耐挠曲性、黏结性和防水性均优于其他增塑剂。
本发明所述的水溶性聚氨酯防水涂料,可以在普通墙体、屋面、钢架 结构、船体或石油储罐涂覆上的应用。
本发明的竹纤维素有较强的耐磨性,具有天然抗菌、抑菌、除螨、防臭和抗紫外线功能。
本发明的有益效果是 :耐化学性强、耐温高、耐候性好、耐沾污性好、自 洁性强的特点,还保证具有反射、隔热、保温作用功能的材料牢固的粘接在涂料中,延长涂 料寿命。
具体实施方式
实施例 1 : 聚氨酯预聚体 40份 ;N- 羟甲基丙烯酰胺 1 份 ;邻苯二甲酸二丁酯 3份 ;高钛粉8 份 ;消泡剂 0.1份 ;竹纤维素3 份 ;混合溶剂 9 份 ;所述的混合溶剂是木醇-芥子醇-对羟基苯木质素与乙二醇丁醚加水的混合物,重量比例为 4:3:10,将N-羟甲基丙烯酰胺与聚氨酯预聚体在反应釜中混合,反应温度 80℃,反应2h后加入邻苯二甲酸二丁酯 、高钛粉 、竹纤维素 ;混合溶剂,混合均匀即可得到水溶性聚氨酯防水涂料产品。
实施例 2 :聚氨酯预聚体 45 份 ;N- 羟甲基丙烯酰胺 1 份 ;邻苯二甲酸二丁酯 6份 ;高钛粉16 份 ;消泡剂 0.2 份 ;竹纤维素6份 ;混合溶剂12 份 ;所述的混合溶剂是木醇-芥子醇-对羟基苯木质素与乙二醇丁醚加水的混合物,重量比例为 4:3:10,将N-羟甲基丙烯酰胺与聚氨酯预聚体在反应釜中混合,反应温度100℃,反应2h后加入邻苯二甲酸二丁酯 、高钛粉 、竹纤维素 ;混合溶剂,混合均匀即可得到水溶性聚氨酯防水涂料产品。
实施例 3 : 聚氨酯预聚体50 份 ;N- 羟甲基丙烯酰胺2 份 ;邻苯二甲酸二丁酯9份 ;高钛粉 22 份 ;消泡剂0.3 份 ;竹纤维素10 份 ;混合溶剂 15 份 ;所述的混合溶剂是木醇-芥子醇-对羟基苯木质素与乙二醇丁醚加水的混合物,重量比例为 4:3:10,将N-羟甲基丙烯酰胺与聚氨酯预聚体在反应釜中混合,反应温度 150℃,反应2h后加入邻苯二甲酸二丁酯 、高钛粉 、竹纤维素 ;混合溶剂,混合均匀即可得到水溶性聚氨酯防水涂料产品。
Claims (4)
1.一种水溶性聚氨酯防水涂料,其特征在于,制成该涂料包括以下重量份数的原料 :聚氨酯预聚体 40 - 50 份 ;N- 羟甲基丙烯酰胺 1-2 份 ;邻苯二甲酸二丁酯 3-9份 ;高钛粉8- 22 份 ;消泡剂 0.1 - 0.3 份 ;竹纤维素3 -10 份 ;混合溶剂 9 - 15 份 ;所述的混合溶剂是木醇-芥子醇-对羟基苯木质素与乙二醇丁醚加水的混合物,重量比例为 4:3:10。
2.根据权利要求1所述的一种水溶性聚氨酯防水涂料,其特征在于,所述的消泡剂是甲基硅油。
3.根据权利要求1所述的一种水溶性聚氨酯防水涂料,其特征在于,所述的高钛粉的二氧化钛纯度在97以上%。
4. 一种水溶性聚氨酯防水涂料,其特征在于,制备方法包括以下步骤: 将N-羟甲基丙烯酰胺与聚氨酯预聚体在反应釜中混合,反应温度 80-150℃,反应2h后加入邻苯二甲酸二丁酯 、高钛粉 、竹纤维素 ;混合溶剂,混合均匀即可得到水溶性聚氨酯防水涂料产品。
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CN114426792B (zh) * | 2022-01-21 | 2022-12-23 | 广州市盛艺门业有限公司 | 一种带有装饰贴面的烤漆门板及其制作方法 |
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