CN105694796B - 一种聚氨酯改性堵漏胶泥 - Google Patents

一种聚氨酯改性堵漏胶泥 Download PDF

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CN105694796B
CN105694796B CN201610132650.0A CN201610132650A CN105694796B CN 105694796 B CN105694796 B CN 105694796B CN 201610132650 A CN201610132650 A CN 201610132650A CN 105694796 B CN105694796 B CN 105694796B
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师伟
李晓东
伊世香
周莉莉
蔡卫民
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NINGBO YIXIANG BLOW FURNITURE CO., LTD.
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Abstract

本发明公开了一种聚氨酯改性堵漏胶泥，包括总重量份数比为100:40～60:5～20的A组分、B组分和C组分；A组分包括聚氨酯改性环氧树脂、云母粉Al2O3、一缩二乙二醇；B组分包括二乙烯三胺、单环氧化合物、DMP‑30催化剂、胶体石墨；C组分包括硫脲或硫脲衍生物、CaO和/或Ca(OH)2、8‑羟基喹啉。与现有技术相比，本发明所提供的聚氨酯改性堵漏胶泥韧性好，能够有效防止管道裂纹的扩展，保证修补效果，并且可带温、带压堵漏，预先涂覆可防止设备裂纹的产生，且冬季胶泥的固化速度快，材料环保，无副作用气味产生，操作安全性好。

Description

一种聚氨酯改性堵漏胶泥
技术领域
本发明属于聚氨酯材料技术，特别涉及一种聚氨酯改性堵漏胶泥。
背景技术
堵漏胶泥是电厂、炼油厂、化工厂、化肥厂、化纤厂、钢铁厂、制药厂、印染厂、造纸厂，供热、供气(煤气、液化石油气等系统)、供水排水系统、贮运系统、以及食品工业等行业的设备、管道、阀门的法兰、各个部位管、器壁，自密封阀、阀盖、阀体、螺纹接头、管道与法兰连接等堵漏的极佳材料，用以保障管道的密封性，确保生产安全。
现有的堵漏胶泥的主要有丙烯酸酯胶泥和环氧树脂胶泥。其中丙烯酸酯胶泥固化速度较快，但是固化物较脆，容易产生裂纹，气味大，毒性高，不环保，不耐碱，对手的腐蚀性较大，不易操作；环氧树脂胶泥粘接强度高，但是固化物脆性大，易产生裂纹，并且裂纹易扩展，同时固化速度和低温固化性能也有待提高。
发明内容
发明目的：针对现有技术的不足，提供一种韧性好、能够避免胶泥裂纹产生的聚氨酯改性堵漏胶泥。
本发明解决上述技术问题所采用的技术方案为：一种聚氨酯改性堵漏胶泥，其特征在于，包括总重量份数比为100:40～60:5～20的A组分、B组分和C组分；
其中，所述A组分包括内部重量份数比如下的下述组分：
所述Al2O3的粒度≤200目，所述云母粉的粒度为50～200目；
将所述的聚氨酯改性环氧树脂、云母粉、Al2O3和一缩二乙二醇混合均匀，加热至30～60℃，恒温20～40分钟，即得到A组分；
所述B组分包括内部重量份数比如下的下述组分：
所述C组分包括内部重量份数比如下的下述组分：
硫脲或硫脲衍生物 0.5～1.5重量份
CaO和/或Ca(OH)2 10～20重量份
8-羟基喹啉 0.5～1.5重量份；
当CaO和Ca(OH)2同时使用时，两者的重量比为1.5～4.5:1；
将所述硫脲或硫脲衍生物、CaO和/或Ca(OH)2和8-羟基喹啉捏合后即得到C组分；
将总重量份数比为100:40～60:5～20的所述A组分、B组分和C组分混合均匀，捏合后即得到聚氨酯改性堵漏胶泥。
所述A组分中的聚氨酯改性环氧树脂可以根据需要选用现有技术中的任一种，较好的，所述聚氨酯改性环氧树脂的制备方法如下：
向反应釜中加入聚醚，加热至115～120℃，抽真空脱水1～3h，冷却后得到脱水聚醚；
将多异氰酸酯加入反应釜，加热至40～80℃，搅拌，然后加入所述脱水聚醚，所述多异氰酸酯与所述脱水聚醚的重量比为100:200～300，在60～100℃保温，检测反应物料中的NCO-基团含量为4～6％时停止反应，冷却后得到预聚体；
将环氧树脂加入反应釜，所述环氧树脂与所述预聚体的重量比为100:5～20，然后加入所述预聚体，在60～100℃反应1.5～4.5h后出料，冷却至40℃以下，得到聚氨酯改性环氧树脂。
上述各方案中，所述B组分可以直接混合使用，较好的，所述B组分的制备方法如下：
所述所述B组分中的单环氧化物选用660A环氧稀释剂，将所述660A环氧稀释剂、二乙烯三胺和DMP-30混合均匀，加热到30～75℃、恒温时间维持1.0h，然后冷却至20～40℃，再加入胶体石墨，混合均匀后即得到B组分。
所述C组分中的硫脲衍生物优选四甲基硫脲或二乙基硫脲。
本发明的优点和有益效果：与现有技术相比，本发明所提供的聚氨酯改性堵漏胶泥韧性好，能够有效防止管道裂纹的扩展，保证修补效果，并且可带温、带压堵漏，预先涂覆可防止设备裂纹的产生，且冬季胶泥的固化速度快，材料环保，无副作用气味产生，操作安全性好。
具体实施方式
为了使本发明的目的、技术方案和优点更加清楚，下面结合具体实施例和实验数据对本发明进行详细描述。
实施例：
1、制备A组分
将聚醚加入反应釜，加热至115～120℃，抽真空脱水2小时，冷却后待用；
向反应釜中加入聚醚，加热至115～120℃，抽真空脱水2小时，冷却后得到脱水聚醚；
将多异氰酸酯加入反应釜，加热至60℃，搅拌，然后加入所述脱水聚醚，所述多异氰酸酯与所述脱水聚醚的重量比为100:5～20，在80℃保温，当反应物料中的NCO-基团含量为5％时停止反应，冷却后得到预聚体；
将环氧树脂加入反应釜，所述环氧树脂与所述预聚体的重量比为100:5～20，然后加入所述预聚体，在80℃反应3小时后出料，冷却至40℃或以下，得到聚氨酯改性环氧树脂。
向聚氨酯改性环氧树脂中加入一缩二乙二醇，搅拌均匀，再在捏合机中，加入聚氨酯改性环氧，云母粉，Al2O3粉末一起捏合，加热至50℃，时间30分钟即成。
所述A组分中各组分的内部重量份数比如下：
所述Al2O3的粒度≤200目，所述云母粉的粒度为50～200目。
2、制备B组分
所述B组分中各组分的内部重量份数比如下：
所述单环氧化合物优选660A环氧稀释剂；
将660A环氧稀释剂、二乙烯三胺和DMP-30混合均匀，加热到30～75℃、恒温时间维持1.0h，然后冷却至20～40℃，加入胶体石墨，混合均匀后即得到B组分。
3、制备C组分
所述C组分包括内部重量份数比如下的下述组分：
硫脲 1份
CaO和Ca(OH)2的混合物 15份
8-羟基喹啉 1份
CaO和Ca(OH)2的重量比为3:1；也可以单独使用CaO或Ca(OH)2代替CaO和Ca(OH)2。
硫脲也可以使用四甲基硫脲或二乙基硫脲代替。
将硫脲、CaO和Ca(OH)2、8-羟基喹啉混合均匀，捏合后即得到C组分。
4、制备聚氨酯改性堵漏胶泥
将上述制备得到的A组分、B组分和C组分按100:50:10的重量份数比混合，揉捏均匀，即得到聚氨酯改性堵漏胶泥。
检测该胶泥的性能，制成试片检测，结果见表1所示。
表1
B组分中二乙烯三胺与单环氧化合物反应，能够有效抑制胶泥的毒性，降低发热量，减小胶泥材料气味，改善操作性，避免裂纹的生成；而DMP-30的加入可使胶泥在零度左右固化，改善了胶泥低温固化性能；胶体石墨的使用，能够有效提高胶泥粘附力；而硫脲或硫脲衍生物的使用能够加快固化速度，8-羟基喹啉能够提高粘接强度和耐老化性及固化速度；CaO和/或Ca(OH)2能够提高潮湿条件下胶泥的固化性，同时提高固化速度。

Claims (4)

1.一种聚氨酯改性堵漏胶泥，其特征在于，包括总重量份数比为100:40～60:5～20的A组分、B组分和C组分；
其中，所述A组分包括内部重量份数比如下的下述组分：
所述Al2O3的粒度≤200目，所述云母粉的粒度为50～200目；
所述聚氨酯改性环氧树脂的制备方法如下：
向反应釜中加入聚醚，加热至115～120℃，抽真空脱水1～3h，冷却后得到脱水聚醚；
将多异氰酸酯加入反应釜，加热至40～80℃，搅拌，然后加入所述脱水聚醚，所述多异氰酸酯与所述脱水聚醚的重量比为100:200～300，在60～100℃保温，检测反应物料中的NCO-基团含量为4～6％时停止反应，冷却后得到预聚体；
将环氧树脂加入反应釜，所述环氧树脂与所述预聚体的重量比为100:5～20，然后加入所述预聚体，在60～100℃反应1.5～4.5h后出料，冷却至40℃以下，得到聚氨酯改性环氧树脂；
将所述的聚氨酯改性环氧树脂、云母粉、Al2O3和一缩二乙二醇混合均匀，加热至30～60℃，恒温20～40分钟，即得到A组分；
所述B组分包括内部重量份数比如下的下述组分：
所述C组分包括内部重量份数比如下的下述组分：
硫脲或硫脲衍生物 0.5～1.5重量份
CaO和/或Ca(OH)2 10～20重量份
8-羟基喹啉 0.5～1.5重量份；
当CaO和Ca(OH)2同时使用时，两者的重量比为1.5～4.5:1；
将所述硫脲或硫脲衍生物、CaO和/或Ca(OH)2和8-羟基喹啉捏合后即得到C组分；
将总重量份数比为100:40～60:5～20的所述A组分、B组分和C组分混合均匀，捏合后即得到聚氨酯改性堵漏胶泥。
2.根据权利要求1所述的聚氨酯改性堵漏胶泥，其特征在于，所述B组分直接混合使用。
3.根据权利要求1所述的聚氨酯改性堵漏胶泥，其特征在于，所述B组分的制备方法如下：
所述B组分中的单环氧化合物选用660A环氧稀释剂；
将所述660A环氧稀释剂、二乙烯三胺和DMP-30混合均匀，加热到30～75℃、恒温时间维持1.0h，然后冷却至20～40℃，再加入胶体石墨，混合均匀后即得到B组分。
4.根据权利要求1所述的聚氨酯改性堵漏胶泥，其特征在于，所述C组分中的硫脲衍生物选用四甲基硫脲或二乙基硫脲。
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CN103113841A (zh) * 2012-12-07 2013-05-22 北京航天试验技术研究所 一种耐强酸性环氧树脂快速堵漏剂的制备方法

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