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One-component polyurethane waterproof paint and preparation method thereof

A polyurethane waterproof, one-component technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor durability of hydrophobic effect, low glass transition temperature, easy precipitation, etc. Good color and low surface energy

Active Publication Date: 2016-05-11
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the low glass transition temperature of polyurethane waterproof coatings, especially aliphatic isocyanates, they have low activity, slow reaction, low strength, soft coating film and certain rubber viscoelasticity, and the surface is easy to get dirty when exposed. agent, which can improve the porosity to a certain extent, but it is easy to precipitate, and the durability of the hydrophobic effect is poor

Method used

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  • One-component polyurethane waterproof paint and preparation method thereof
  • One-component polyurethane waterproof paint and preparation method thereof
  • One-component polyurethane waterproof paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This embodiment provides a one-component polyurethane waterproof coating. The raw material formula for preparing the one-component polyurethane waterproof coating includes: aliphatic isocyanate, non-hydrophobic polyether polyol, catalyst, and reactive hydrophobic agent containing hydroxyl.

[0035] This embodiment provides a method for preparing a one-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned raw material formula:

[0036] (1) Mix non-hydrophobic polyether polyol and reactive hydrophobic agent containing hydroxyl group, stir and heat up to 100°C, and dehydrate under vacuum -0.01MPa for 2.3 hours;

[0037] (2) Lower the temperature to 70°C, add aliphatic isocyanate, and react for 4.5 hours;

[0038] (3) Cool down to 35°C, add catalyst, stir for 1.8 hours, cool down to 38°C, fill with inert gas for protection, and discharge to obtain one-component polyurethane waterproof coating.

[0039] The hydro...

Embodiment 2

[0041] This embodiment provides a kind of one-component polyurethane waterproof coating, and the raw material formula for preparing this one-component polyurethane waterproof coating includes:

[0042]

[0043] The aliphatic isocyanate is hexamethylene diisocyanate and isophorone diisocyanate (weight ratio is 2:1), the non-hydrophobic polyether polyol is polyether glycol, and the latent curing agent is The imine type latent curing agent, the reactive hydrophobic agent containing hydroxyl group is triethoxysilanol.

[0044] This embodiment provides a method for preparing a one-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned raw material formula:

[0045] (1) Mix non-hydrophobic polyether polyol and reactive hydrophobic agent containing hydroxyl group, stir and heat up to 120°C, and dehydrate under vacuum -0.01MPa for 3 hours;

[0046] (2) Lower the temperature to 60°C, add aliphatic isocyanate, and react fo...

Embodiment 3

[0050] This embodiment provides a kind of one-component polyurethane waterproof coating, and the raw material formula for preparing this one-component polyurethane waterproof coating includes:

[0051]

[0052] The aliphatic isocyanate is dicyclohexylmethane diisocyanate, the non-hydrophobic polyether polyol is polyether triol, the latent curing agent is an oxazolidine type latent curing agent, and the hydroxyl-containing reactive type The hydrophobic agent is triethoxysilanol and silicon-containing polyether polyol.

[0053] This embodiment provides a method for preparing a one-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned raw material formula:

[0054] (1) Mix non-hydrophobic polyether polyol and reactive hydrophobic agent containing hydroxyl group, stir and heat up to 110°C, and dehydrate under vacuum -0.01MPa for 2 hours;

[0055] (2) Lower the temperature to 100°C, add aliphatic isocyanate, and reac...

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Abstract

The invention discloses one-component polyurethane waterproof paint and a preparation method thereof. The one-component polyurethane waterproof paint is prepared from aliphatic isocyanates, non-hydrophobic polyether polyol, catalysts, a hydroxyl containing reactive hydrophobic agent. The hydroxyl containing reactive hydrophobic agent in the one-component polyurethane waterproof paint is hydrophobic and highly compatible to other components, and accordingly compatibility of prepolymers generated by the hydroxyl containing reactive hydrophobic agent and the aliphatic isocyanates to other components of the one-component polyurethane waterproof paint is improved, and precipitation of the hydrophobic agent is avoided. Due to hydrophobility of the prepolymers, the one-component polyurethane waterproof paint is hydrophobic; since the hydroxyl containing reactive hydrophobic agent is combined into a molecular structure of polyurethane through chemical reactions, precipitation of the hydroxyl containing reactive hydrophobic agent is avoided permanently, hydrophobicity and hydrophobic stability of the one-component polyurethane waterproof paint are improved, and long-lasting hydrophobic effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of polyurethane waterproof coatings, in particular to a single-component polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating is a chemical reaction type waterproof coating. After curing, it is a rubber-like high-elastic coating film. The coating film is seamless as a whole. Because of its excellent comprehensive performance, it is called "liquid coil" by the industry. It is widely used in the interior, especially suitable for waterproofing of special-shaped parts. According to its composition and curing mechanism, polyurethane waterproof coatings can be divided into two categories: single-component polyurethane waterproof coatings and multi-component polyurethane waterproof coatings. Since the multi-component polyurethane waterproof coating needs to be mixed in a certain proportion and mechanically stirred during on-site constructio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/08C08G18/66C08G18/48C08G18/30C08G18/50
CPCC08G18/289C08G18/4804C08G18/5015C08G18/5096C08G18/6666C09D175/08
Inventor 李红英韩海军褚卫焦明明
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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