在防水施工做聚氨酯防水涂料施工时都会遇到一些问题，那么在处理这些防水材料时如何解决这些难题呢？

In the construction of waterproofing polyurethane waterproof coating, there will be some problems, so how to solve these problems when dealing with these waterproof materials?

一、粘度

1. Viscosity

（1）涂料本身粘度很大，施工费力。

(1) the viscosity of the coating itself is great and the construction is hard.

（2）客户采用辊涂和刷涂的方式，则需要更小的粘度，以利施工。

(2) the customer uses the roll coating and the brush coating method, then needs smaller viscosity, in order to benefit the construction.

解决方案：建议采用橡胶或金属刮板刮涂施工，不宜采用辊涂或刷涂的方式进行施工。添加稀释剂，应先做小试试验。

Solution: it is suggested that rubber or metal scraper is used in the construction, so it is not suitable to use roll coating or brush coating. When the diluent is added, a small test should be done first.

温馨提示：当然，建议尽量不添加稀释剂。

Warm hint: of course, the suggestion is not to add the thinner as much as possible.

 

 

二、涂膜出现大量的气泡或小孔

Two. A large number of bubbles or pores appear in the coating.

在以下情况下施工，涂膜易出现大量的气泡或小孔：

In the following cases, a large number of bubbles or small holes are easy to appear in the coating.

（1）天气潮湿或下雨。不要在潮湿或下雨天施工，下雨后要等基层干燥后再施工，施工后要做好防雨措施。

(1) the weather is wet or raining. Do not work in wet or rainy days, after the rain should be dry after the construction, after the construction, the rain measures should be done.

（2）客户在使用时添加入了低沸点稀释剂，稀释剂快速挥发易出现气泡或小孔。

(2) the customers added into the low boiling point diluent when they were used, and the rapid volatilization of the diluent was easy to produce bubbles or small holes.

（3）天气炎热，基层温度高，建议遮阳或傍晚施工。

(3) the weather is hot and the base temperature is high. It is suggested that the sun shading or the construction in the evening.

（4）疏松多孔基层，应使用专用基层处理剂进行基层处理，或将涂料适当稀释，第一遍薄涂，以封闭基层孔隙。

(4) loose porous base course should be treated with special base treatment agent, or dilute the coating properly and apply thin coating for the first time to seal the base pore.

（5）单组分产品：一次涂膜太厚，建议适当薄涂。

(5) single component: once the coating is too thick, it is suggested that the coating is suitable and thin.

（6）双组分产品：应在开放时间内施工完毕，尤其是夏季高温；避免因过高速度搅拌引入大量气泡；配比不对，也会有气泡产生。

(6) two component products: it should be completed in open time, especially in summer, avoid excessive bubbles due to excessive speed mixing, and air bubbles will also occur if the proportion is not correct.

解决方案：对因以上原因而产生大量起泡或气孔部分，建议铲除重做，或者等到涂膜干燥后，在上面再重做一层防水层。 

Solution: for the above reasons, a large number of bubbles or pores are generated. It is recommended to remove and redo, or wait until the coating is dry, and then make a waterproof layer on the top.  

三、涂膜不干或干燥慢；没强度或强度不够

Three. The film is not dry or dry; no strength or strength is not enough

 在以下情况下施工，涂膜易出现发粘，不干或干燥慢，没强度或强度不够等现象：

Construction in the following circumstances, the film is easy sticky, not dry or dry slowly, not strength or insufficient strength etc.:

（1）聚氨酯在低温时通常干燥比较慢。一般干燥时间约24小时，低温时干燥需要2天或更长的时间（视具体的温湿度而定），温度越低，干燥时间越长。

(1) polyurethane is usually slow when it is low at low temperature. Drying time is about 24 hours, and drying at low temperature takes 2 days or longer (depending on specific temperature and humidity). The lower the temperature, the longer the drying time is.

（2）添加不合适的稀释剂或使用不干燥的容器，会影响产品干燥和性能。

(2) the addition of unsuitable diluents or the use of Undry containers will affect the drying and performance of the products.

（3）双组分沉淀或配比不对或搅拌不均匀，使用前应搅拌均匀，并严格按推荐配比准确计量，并用机械搅拌设备充分混合均匀。

(3) two component precipitation or incorrect mixing or stirring is not uniform. It should be evenly mixed before use and accurately measured according to the recommended ratio, and fully mixed with mechanical stirring equipment.

解决方案：若施工后出现上述现象，已经影响了防水性能，需要铲除重做。

Solution: if the above phenomenon appears after construction, it has already affected the waterproof performance and needs to be removed and redone.

 

 

四、成膜后起鼓或与基层脱落问题

Four, the film after drum or falling off and base

涂料成膜后起鼓或与基层脱落问题的主要原因：

The main reason of coating film after drum or falling off and base:

（1）基层疏松或有浮灰或有油性物质，施工前应彻底清除此类物质。

(1) primary osteoporosis or dust or oily substances, such substances should be thoroughly removed before construction.

（2）使用不合适的基层处理剂（如冷底子油），严禁使用不合适的基层处理剂。

(2) the use of inappropriate base treatment agents, such as cold base oil, is strictly forbidden to use unsuitable base treatment agents.

（3）基层有水或潮湿，应等基层干燥后再施工。

(3) there is water or humid at the base, and it should be dry after drying.

（4）涂膜没有完全干燥就进行闭水实验或打保护层，应完全干燥后在再进行下道工序。

(4) when the coating is not completely dry, the water closed test or protection layer should be carried out, and the next process should be carried out after the complete drying.

（5）双组分配比不准或混合不均。

(5) the ratio of two groups is not allowed or mixed unevenly.

（6）施工方案不合适，不建议与水性涂料混用。若在水性涂料上涂刷聚氨酯防水涂料，应彻底让下面的水性涂料涂膜彻底干燥。

(6) the construction scheme is not suitable, and it is not recommended to be mixed with water-based coatings. If the waterborne coatings are painted with polyurethane waterproof coating, it is necessary to thoroughly dry the coating film of the water-based coatings.

解决方案：涂料成膜后起鼓或与基层脱落，需要将起鼓或脱落部分铲除重做，必要时应重新进行基层处理。

Solution: the coating film is formed after drum or level off, will need to play drums or eradicate the missing part redo, when necessary to grassroots.