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Organosilane modified single-component polyurethane waterproof coating and preparation method thereof

A polyurethane waterproof and organic silane technology, applied in the direction of coating, etc., can solve the problems of thick coating, incomplete coating, waste, etc., and achieve the effect of reducing environmental dependence, solving construction problems, and smooth and beautiful coating

Inactive Publication Date: 2014-12-10
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The curing mechanism of the currently used one-component polyurethane waterproof coating is that the prepolymer containing -NCO end group reacts with moisture to form a film, and releases CO 2 Gas, so it is easy to be disturbed by the humidity of the construction environment during the construction process, and the construction cannot be thickly coated, and the cured coating film is prone to phenomena such as incompactness, air bubbles and pinholes. "foaming" phenomenon, the resulting rework has caused great waste and adverse social impact, seriously affecting the construction quality and popularization and application of one-component polyurethane waterproof coatings

Method used

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  • Organosilane modified single-component polyurethane waterproof coating and preparation method thereof
  • Organosilane modified single-component polyurethane waterproof coating and preparation method thereof
  • Organosilane modified single-component polyurethane waterproof coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: product raw material composition is as follows

[0027]

[0028] crafting process:

[0029] a. Add 30 parts by weight of polyether diol 2000D and 12.5 parts by weight of polyether triol 330N into the reaction vessel, stir and heat up to 100°C-120°C, and dehydrate for 2 to 3 hours under a vacuum of -0.01MPa;

[0030] b. Lower the temperature below 60°C-80°C, add 8 parts by weight of isocyanate TDI, and react for 2-3 hours under stirring at 60-100°C;

[0031] c. Lower the temperature to below 50°C-60°C, add 3.5 parts by weight of an organosilane end-capping agent, and stir at 50-90°C for a silanization reaction for 2 to 3 hours;

[0032] d. Lower the temperature below 50°C-60°C, add 10 parts by weight of diisononyl phthalate (DINP), 25 parts by weight of heavy calcium, 0.2 parts by weight of organotin catalyst T-12, and 0.1 parts by weight of antioxidant 1. 0.5 parts by weight of defoaming agent and 10 parts by weight of solvent, stirred for 1-2 hours, ...

Embodiment 2

[0033] Embodiment 2: the raw material composition of product is as follows

[0034]

[0035] crafting process:

[0036] a. Add 40 parts by weight of polyether diol 2000D to the reaction vessel, stir and heat up to 100°C-120°C, and dehydrate for 2-3 hours under the condition of vacuum of -0.01MPa;

[0037] b. Lower the temperature below 60°C-80°C, add 10 parts by weight of isocyanate MDI-500, and react for 2-3 hours under stirring at 60-100°C;

[0038] c. Lower the temperature to below 50°C-60°C, add 5 parts by weight of organosilane end-capping agent, and stir at 60-90°C for silanization reaction, and react for 2-3 hours;

[0039] d. Lower the temperature below 50°C-60°C, add 12 parts by weight of chlorinated paraffin, 18 parts by weight of heavy calcium, 9 parts by weight of talcum powder, 0.2 parts by weight of carbon black, 0.2 parts by weight of organotin catalyst T-12, defoaming 0.3 parts by weight of agent, 0.1 parts by weight of dewatering agent, 0.2 parts by weigh...

Embodiment 3

[0040] Embodiment 3: the raw material composition of product is as follows

[0041]

[0042] crafting process:

[0043] a. Add 15 parts by weight of polyether diol 2000D, 10 parts by weight of polyether diol 1000D and 15 parts by weight of polyether triol 2000D in the reaction vessel, stir and raise the temperature to 100°C-120°C, and the vacuum is -0.01 Dehydration under the condition of MPa for 2 to 3 hours;

[0044] b. Lower the temperature below 60°C-80°C, add 6 parts by weight of isocyanate TDI and 6 parts by weight of isocyanate MDI-50, and react for 2 to 3 hours under stirring at 60-100°C;

[0045] c. Lower the temperature to below 50°C-60°C, add 6.6 parts by weight of organosilane end-capping agent, and silanization reaction occurs under stirring at 50-90°C for 2-3 hours;

[0046]d. Lower the temperature below 50°C-60°C, add 10 parts by weight of triethyl citrate, 2 parts by weight of titanium dioxide, 16 parts by weight of heavy calcium, 8 parts by weight of bari...

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Abstract

The invention discloses an organosilane modified single-component polyurethane waterproof coating. By means of replacing the isocyanate crosslinking mechanism by virtue of the silane crosslinking mechanism, alkoxy silane with reactive activity at the end of the chain of a prepolymer is hydrolyzed and condensed to form a stable siloxane (Si-O-Si) crosslinking network, so that CO2 gas is prevented from being released due to reaction of a NCO group and wet gas, the problems of pinholes of a film and bubbles are reduced, the compactness of the film is increased, the environmental dependency of product construction is reduced, and the problem that the conventional single-component polyurethane waterproof coating is hard to construct is solved. The organosilane modified single-component polyurethane waterproof coating disclosed by the invention is prepared from the following components in parts by weight: 5-20 parts of isocyanate, 20-50 parts of polyether polyol, 5-15 parts of plasticizer, 5-20 parts of solvent, 1-10 parts of organosilane end-capping reagent, 10-30 parts of pigments and packing, 0.2-1 part of catalyst and 0.1-1 part of high-performance auxiliaries.

Description

technical field [0001] The invention relates to a building waterproof coating, in particular to an organosilane-modified one-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating belongs to chemical reaction type waterproof coating. After curing, it is a kind of rubber-like high-elastic coating film. This material is widely used in the world because of its excellent comprehensive performance. Since the early 1980s in my country, it has been popularized and applied. It is the most successful coating waterproof material used so far, and it occupies an important position in the application of building waterproofing. Polyurethane waterproof coating is an important promotion and development of waterproof coating in the "National Chemical Building Materials Industry "Tenth Five-Year" Plan and 2010 Development Plan Outline", and is listed as a preferred waterproof material in the "Chemical Building ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/66C08G18/48C08G18/38
Inventor 李红英段文锋贾建军
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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