Environment-friendly mono-component polyurethane waterproof paint and preparation method thereof
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A polyurethane waterproof and environmentally friendly technology is applied in the field of polyurethane waterproof coatings to achieve the effects of environmental protection, convenient operation and large market demand.
Inactive Publication Date: 2014-06-18
哈尔滨六环涂料化工有限公司
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[0003] On April 5, 2007, the Department of Science and Technology of the Ministry of Railways issued an opinion on passenger dedicated lines, especially high-speed passenger lines, based on the application of waterproof layers for high-speed railway bridges abroad, the latest test and research results, and the opinions reflected by construction units during the construction of waterproof layers. The polyurethane waterproof coating on the special line puts forward higher requirements, requiring its strength not less than 6.0MPa, and the elongation at break must be above 450%, but most of the polyurethane waterproof coatings on the market today are difficult to achieve this request
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Embodiment 1
[0013] 1) Synthesis of prepolymer: add 10-50% polyether and 10% plasticizer to the reaction kettle, and carry out water removal and dehydration treatment. When the water content in the system reaches the requirement, add 8% MDI, stir and react at 70-100°C for a certain period of time, cool down to below 40°C, discharge the material, and seal it for storage;
[0014] 2) Heat up the prepolymer prepared in step 1) to 50-60°C, add pre-dried inorganic fillers, catalysts and other additives, and stir evenly.
Embodiment 2
[0016] 1) Synthesis of prepolymer: Add 30% polyether and 10% plasticizer to the reaction kettle for water removal and dehydration treatment. When the water content in the system reaches the requirement, add 8% MDI, stir and react at 70-100°C for a certain period of time, cool down to below 40°C, discharge the material, and seal it for storage;
[0017] 2) For the prepolymer prepared in step 1), heat up to 50-60°C, add pre-dried inorganic filler, 0.1% dibutyltin dilaurate catalyst and other additives, and stir well to obtain the product.
Embodiment 3
[0019] 1) Synthesis of prepolymer: Add 30% polyether and 10% plasticizer to the reaction kettle for water removal and dehydration treatment. When the water content in the system reaches the requirement, add 8% MDI, stir and react at 70-100°C for a certain period of time, cool down to below 40°C, discharge the material, and seal it for storage;
[0020] 2) For the prepolymer prepared in step 1), heat up to 50-60°C, add pre-dried inorganic filler, 0.3% dibutyltin dilaurate catalyst and other additives, and stir well to get the product.
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Abstract
The invention relates to a polyurethane waterproof paint and a preparation technology thereof, and aims to provide an environment-friendly polyurethane waterproof paint capable of being prepared through a simple method and a preparation method thereof. The preparation method comprises the following steps: (1) preparing a prepolymer: adding polyether and a plasticizer into a reactor to carry out a dehydration treatment; after the water content in the system meets the requirement, adding MDI into the reactor, carrying out reactions at a temperature of 70 to 100 DEG C for a while, cooling the reactor to a temperature of 40 DEG C or less, discharging the materials, and storing the materials in a sealed container; (2) heating the prepolymer obtained in the step (1) to a temperature of 50 to 60 DEG C, adding an inorganic filler, which has been dried in advanced, a catalyst, and other auxiliary agents into the prepolymer, and evenly stirring so as to obtain the target product. The environment-friendly mono-component polyurethane waterproof paint has the advantages of simpler construction, more convenient operation, no free TDI in the paint, little odor, benefit for environment and health of workers, and large market demand.
Description
technical field [0001] The invention relates to a polyurethane waterproof coating and a preparation process thereof, more specifically, the invention relates to a polyurethane waterproof coating applied in the construction field. Background technique [0002] The paint market in the Asia-Pacific region has been booming in recent years. At the beginning of the new century, the paint and paint in the Asia-Pacific region will increase from 5.5 million tons in the 1990s to 6.6 million tons, and it is estimated that it will increase to 12 million tons by 2010. The consumption of coatings and paints in China accounts for 25% of this market. The development prospect is broad, and the fastest growing demand is polyurethane coatings. [0003] On April 5, 2007, the Department of Science and Technology of the Ministry of Railways issued an opinion on passenger dedicated lines, especially high-speed passenger lines, based on the application of waterproof layers for high-speed railway br...
Claims
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Application Information
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