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High-strength polyurethane waterproof paint

A polyurethane waterproof and high-strength technology, which is applied in the field of high-strength polyurethane waterproof coatings and railway concrete bridge deck waterproofing, can solve the problems of economic waste, waterproof coating toxicity reduction, and increased use safety, and achieve chemical corrosion resistance and high fracture Elongation, the effect of reducing possible migration

Active Publication Date: 2014-10-08
ZHEJIANG HANGMO SYNTHETIC MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of solvents not only affects health and the environment during the construction process, but also brings safety hazards during storage, transportation and use. Its volatilization into the atmosphere also brings economic waste
On the other hand, the strength of the original polyurethane waterproof coating is low. For example, GB / T19250-2003 requires the tensile strength of the coating film to be ≥ 2.45Mpa, while the railway bridge deck waterproof coating standard TB / T2965-2011 requires ≥ 6.0Mpa. Obviously, the original national standard The product cannot meet the requirements of railway products
为了解决上述两大问题,人们进行了很多改进,如CN201010545081,CN200810018411,CN200910069936,CN201310199705,CN200710119994,CN200910014090,CN201010138301,CN201210286027等提出采用低毒性的二胺基二苯甲烷二异氰酸酯替代高毒性的甲苯二异氰酸酯 , using dibutyl (octyl) phthalate, chlorinated paraffin, and petroleum resin as diluents or plasticizers, although the above method can greatly reduce the toxicity of waterproof coatings, increase the safety of use, and basically increase the strength of waterproof coatings. It meets the requirements of railway products, but there are still deficiencies in product stability and economy, and needs to be further improved and improved

Method used

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  • High-strength polyurethane waterproof paint
  • High-strength polyurethane waterproof paint
  • High-strength polyurethane waterproof paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 100kg of trifunctional polyether 330N (hydroxyl value 36) into a 500L reactor, 25kg of difunctional polyether 220 (hydroxyl value 56), 15kg of low polycondensate of hydroxyphthalic acid polyol (hydroxyl value 400), chlorinated diamino 45kg of diphenylmethane cross-linking agent, stir and heat up to 110-120°C for 0.5 hours; then add 9kg of 300-mesh iron oxide red pigment, 15kg of 400-mesh wollastonite filler, 5kg of 200-mesh calcium oxide filler, 180kg of 600-mesh calcium carbonate filler , chlorinated paraffin 42 is 85kg, antioxidant 264 is 1kg, liquid coumarone resin 50kg, solid coumarone resin 10kg, at 110~120℃, -0.09~0.10MPa vacuum mixing and dehydration for 2 hours, cooling to 60 ℃, add 0.4kg of silane defoamer, grind and discharge through colloid mill, test 25℃ viscosity 15100mpa.s, hydroxyl value 54.8mgKOH / g, package as A component.

[0023] Put 80kg of trifunctional polyether 330 (hydroxyl value 56), 150kg of difunctional polyether 220 (hydroxyl value 56), an...

Embodiment 2

[0029]Put 100kg of trifunctional polyether polyol (hydroxyl value 30) into a 500L reactor, 20kg of difunctional polyether polyol (hydroxyl value 120), 10kg of low condensation polymer of terminal hydroxyphthalic acid polyol (hydroxyl value 300), chlorination Diaminodiphenylmethane cross-linking agent 30kg, stir and heat up to 110-120°C for 0.5 hours; then add 8kg of 1000 mesh iron oxide red pigment, 10kg of 200 mesh wollastonite filler, 7kg of 1000 mesh calcium oxide filler, 200 mesh calcium carbonate 100kg of filler, 80kg of chlorinated paraffin wax 70, 0.5kg of antioxidant 264, 80kg of liquid coumarone resin, stirred and dehydrated in vacuum at -0.09MPa for 3 hours at 100°C, cooled to 60°C, and added silane defoamer 0.1 kg, after being ground by a colloid mill, the viscosity is 10000mpa.s at 25°C, the hydroxyl value is 45mgKOH / g, and it is packaged as component A.

[0030] Put 40kg of trifunctional polyether polyol (hydroxyl value 30), 150kg of difunctional polyether polyol ...

Embodiment 3

[0033] Put 100kg of trifunctional polyether polyol (hydroxyl value 60) into 500L reactor, 30kg of difunctional polyether polyol (hydroxyl value 280), 20kg of low condensation polymer of terminal hydroxyphthalic acid polyol (hydroxyl value 280), chlorination Diaminodiphenylmethane cross-linking agent 50kg, stir and heat up to 120°C for 0.5 hours; then add 2000 mesh iron oxide red pigment 10kg, 2000 mesh wollastonite filler 20kg, 2000 mesh calcium oxide filler 10kg, 2000 mesh calcium carbonate filler 200kg , chlorinated paraffin 42 is 85kg, chlorinated paraffin 70 is 15kg, antioxidant 264 is 0.7kg, solid coumarone resin is 70kg, at 120°C, 0.10MPa vacuum mixing and dehydration for 1 hour, cooling to 80°C, adding silane 0.5kg of defoaming agent, after colloid mill grinding, the viscosity is 30000mpa.s at 25°C, the hydroxyl value is 65mgKOH / g, and it is packaged as component A.

[0034] Put 60kg of trifunctional polyether polyol (hydroxyl value 60), 150kg of difunctional polyether ...

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Abstract

The invention discloses high-strength polyurethane waterproof paint which comprises a component A and a component B, wherein the component A and the component B are mixed uniformly at a weight ratio of 2:1 when in use; the component A is prepared from the following raw materials: trifunctional polyether polyol, bifunctional polyether polyol, a hydroxyl-terminated phthalic polyol oligomer, a chlorinated diaminodiphenylmethane crosslinking agent, an iron oxide red pigment, aedelforsite fillers, calcium carbonate fillers, 80-100 parts of plasticizer, an antioxidant 264, liquid and / or solid coumarone resin and a silane defoamer; the component B is prepared from the following raw materials: trifunctional polyether polyol, bifunctional polyether polyol, a polyol benzoate plasticizer and isomerized diphenyl methane diisocyanate. The polyurethane waterproof paint has the characteristics of high tensile strength, high breaking elongation rate, tear resistance, water tightness, damp-heat aging resistance, chemical corrosion resistance, relatively low cost and the like, and is especially suitable for water prevention of railway concrete bridge surfaces with high strength requirements.

Description

technical field [0001] The invention relates to a waterproof material composed of an organic polymer compound and an inorganic filler, in particular to a high-strength polyurethane waterproof coating, which is especially suitable for the waterproofing of railway concrete bridge decks with high strength requirements. Background technique [0002] Polyurethane waterproof coatings have good elasticity, sealing, and chemical corrosion resistance, and are widely used in the field of waterproofing of industrial and civil buildings. Most of the original polyurethane waterproof coatings use highly toxic toluene diisocyanate as a raw material to react with polyether to form a prepolymer as the main component of waterproof coatings. The high toxicity of toluene diisocyanate may not only affect the health of the operator during the production of the coating, but may also affect the health of the user during the use of the coating. Therefore, in the production of waterproof coatings, it...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D175/06C09D145/02C09D7/12
Inventor 梁平辉
Owner ZHEJIANG HANGMO SYNTHETIC MATERIAL