Spray-coating high-strength elastic waterproof paint of polyurea and construction thereof

A waterproof coating, high-strength technology, applied in anti-fouling/underwater coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of insufficient strength, easy foaming, high elongation, etc., and achieve good substrate adaptability , prolong the service life and overcome the effect of insufficient strength

Active Publication Date: 2006-08-16
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They all have the following obvious deficiencies: high elongation and insufficient strength, easy to be damaged by external force during construction, and not suitable for exposed use; extremely low puncture resistance, not suitable for root puncture resistant waterproof layer of green roof; curing speed Slow, the sagging phenomenon is serious when the facade is thickly coated, and multiple constructions are required to achieve the design thickness, and the construction interval between coatings is long, and the construction efficiency is low; it is sensitive to the temperature and humidity of the construction environment, such as in humid and low temperature environments When used in the environment, it is prone to foaming, slow curing or even no curing, poor adhesion, etc.; in addition, most curing reactive waterproof coatings contain volatile solvents, which are difficult to meet the requirements of environmental protection
These are not conducive to improving the construction quality of waterproofing projects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 10 parts (parts by weight) of diisononyl phthalate and 30.4 parts (parts by weight) of polyether diol (molecular weight: 2000, hydroxyl value: 56mgKH / g) into the reaction kettle, at 90-100°C Dehydration under reduced pressure for 1-2 hours, sampling to measure the moisture content, when the moisture content reaches below 0.08%, stop dehydration. Cool to 80-85°C and maintain at this temperature range, add 4.1 parts (parts by weight) of MDI-100LL dropwise to the kettle while stirring, after the dropwise addition, continue to react at the temperature range of 80-85°C for 2 hours. Then maintain the temperature range of 80-85°C, add the remaining 55.5 parts (parts by weight) of MDI-100LL dropwise to the kettle while stirring, continue to keep warm for 2 hours after the dropwise addition, and take a sample to measure -NCO%. Cool to below 40°C, add defoamer and stir for 15 minutes, then discharge. Thus, a component A containing -NCO of 16.0% by weight was prepared.

[00...

Embodiment 2

[0032] Mix MDI-100LL and MDI-50 uniformly in a weight ratio of 1:1 in advance to prepare polyisocyanate mixture I, which is used in the following synthesis process.

[0033] Add 8 parts (parts by weight) of diisononyl phthalate and 40.1 parts (parts by weight) of polyether diol (molecular weight: 2000, hydroxyl value: 56 mgKH / g) into the reaction kettle, at 90-100°C Dehydration under reduced pressure for 1-2 hours, sampling to measure the moisture content, when the moisture content reaches below 0.08%, stop dehydration. Cool to 80-85°C and maintain at this temperature range, add 5.14 parts (parts by weight) of polyisocyanate mixture I dropwise to the kettle while stirring, after the dropwise addition, continue to react at the temperature range of 80-85°C for 2 hours. Then maintain the temperature range of 80-85°C, add dropwise the remaining 46.76 parts (parts by weight) of the polyisocyanate mixture I to the kettle while stirring, continue the insulation reaction for 2 hours a...

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PUM

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Abstract

A high-elasticity lacquer-spraying waterproof pigment of polyurea and its construction are disclosed. The procedure is carried out by adding counted diluent and polyether polylol into reactor, depress dewatering at 90-100DEG C for 1-2hrs, sampling to determine water content, stopping dewatering when reaching water content below 0.08%, cooling to 80-85 DEG C while retaining the temperature range, agitating while dripping polyisocyanate into reactor, accounting the weight of polyisocyanate by n-oH/n-NCO=1.05, reacting for 2hrs at 80-85 DEG C continuously, retaining at 80-85 DEG C, agitating while dripping residual polyisocyanate into reactor, keeping temperature, reacting for 2hrs continuously, cooling, discharging to obtain A component and mixing A component with B component in proportion of 1:1. The B component consists of amino resin, amine-chain reinforcer and active filler. It has excellent waterproof performance.

Description

technical field [0001] The invention relates to a spraying polyurea high-strength elastic waterproof paint and a construction method thereof. It can be used for waterproofing of various buildings and structures, such as waterproofing and anti-seepage of roofs and basements of buildings, civil air defense projects, subways, roads and bridges, pools, etc. Background technique [0002] At present, commonly used flexible waterproof coatings mainly include: reactive two-component polyurethane waterproof coatings, acrylate emulsion waterproof coatings, silicone rubber waterproof coatings, organic and inorganic composite waterproof coatings, etc. They all have the following obvious deficiencies: high elongation and insufficient strength, easy to be damaged by external force during construction, and not suitable for exposed use; extremely low puncture resistance, not suitable for root puncture resistant waterproof layer of green roof; curing speed Slow, the sagging phenomenon is se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/02C09D5/16
Inventor 谢亦富颜再荣周子鹄李赉周
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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