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Special high performance environmental-protection type polyurethane waterproof coating material for railway roads and bridges, and preparation method thereof

A polyurethane waterproof, high-performance technology, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve problems such as harm to human health, environmental pollution, human health hazards, etc., to achieve safe and environmentally friendly production and use, excellent comprehensive performance, hard work short time effect

Active Publication Date: 2013-11-27
ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This will bring great pollution to the environment and seriously endanger human health.
In addition, most of the curing agents used in existing high-performance polyurethane waterproof coatings are MOCA. MOCA is a suspected carcinogen and will cause great harm to human health.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Preparation of component A: Add 25 parts of polyether TMN3050 (hydroxyl value 56 KOHmg / g) and 45 parts of polyether TDB2000 (hydroxyl value 56 KOHmg / g) into the reactor, heat up to 105°C while stirring, Dehydration at 0.095MPa for 1 hour; then lower the temperature to 62°C. Add 30 parts of MDI-50 and stir evenly, keep it warm at 62°C for 0.5h, then raise the temperature to 84°C, continue to react for 2h until the NCO% value reaches the theoretical value, cool down and discharge the material and seal it for storage, that is, the special high performance for railway bridges Environment-friendly polyurethane waterproof coating A component.

[0024] Preparation of component B: Add 45 parts of YD330N, 35 parts of dimethylthiotoluenediamine, 5 parts of 1000 mesh silica powder, 5 parts of organic montmorillonite, 5 parts of titanium dioxide, and 5 parts of xylene into the reaction kettle, Raise the temperature to 105°C, dehydrate at -0.095Mpa for 2 hours; then cool down to be...

Embodiment 2

[0027] Preparation of component A: Add 40 parts of polyether TMN3050 (hydroxyl value 56 KOHmg / g) and 20 parts of polyether TDB2000 (hydroxyl value 56 KOHmg / g) into the reactor, heat up to 105°C while stirring, Dehydration at 0.095Mpa for 1 hour; then lower the temperature to 62°C. Add 40 parts of MDI-50 and stir evenly, keep warm at 62°C for 0.5h, then raise the temperature to 84°C, continue to react for 2h, until the NCO% value reaches the theoretical value, cool down and discharge the material and seal it for storage, that is, the high performance special for railway bridge Environment-friendly polyurethane waterproof coating A component.

[0028]Preparation of component B: Add 70 parts of YD330N, 15 parts of dimethylthiochlorophenylenediamine, 3 parts of 1000 mesh silica powder, 5 parts of organic montmorillonite, 2 parts of titanium dioxide, and 5 parts of xylene into the reaction kettle , heat up to 105°C, dehydrate at -0.095Mpa for 2 hours; then cool down to below 65°C,...

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Abstract

The present invention relates to a special high performance environmental-protection type polyurethane waterproof coating material for railway roads and bridges. The polyurethane waterproof coating material is a double component polyurethane waterproof coating material comprising a component A and a component B, wherein the component A comprises liquefied diphenylmethane-diisocyanate, polyether glycol, polyether triol and the like, and the component B comprises a curing agent, a modified filler, a pigment, a liquid filler, a composite additive and the like. According to the present invention, the liquefied diphenylmethane-diisocyanate, the liquid curing agent and other novel raw materials are adopted so as to avoid introduction of harmful substances and potential carcinogen substances, such that production and use of polyurethane waterproof coating materials are safe and environmentally friendly; and due to introduction of the modified filler, the prepared polyurethane waterproof coating material has characteristics of short surface drying time, short actual drying time, excellent tensile strength, excellent elongation at break, and other comprehensive performances, and completely meets requirements in the passenger dedicated line bridge concrete deck waterproof layer provisional technical conditions.

Description

technical field [0001] The invention relates to a polyurethane waterproof coating, in particular to a high-performance and environment-friendly polyurethane waterproof coating specially used for railway bridges of passenger dedicated lines. Background technique [0002] Polyurethane waterproof coating is a new type of polymer waterproof coating, which has been widely used in waterproofing projects because of its excellent physical and chemical properties. According to the survey conducted by the China Building Waterproof Materials Industry Association, the proportion of polyurethane waterproof coatings used in waterproofing projects is 17.62%. However, the performance indicators of ordinary polyurethane waterproof coatings are difficult to meet the application requirements of some special fields. For example, the waterproofing of concrete bridge decks of railway bridges is different from the roof and ground waterproofing of ordinary buildings, and also different from th...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/76C08G18/48
Inventor 黄海汪志勇陈钱宝
Owner ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
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