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Bi-component polyurethane waterproof coating and preparation method thereof

A two-component polyurethane and waterproof coating technology, used in the field of waterproof coatings, can solve the problems of increased viscosity of flame retardants, inability to store and use for a long time, gelation, etc., and achieve the effects of long storage time, bright colors and good color retention.

Inactive Publication Date: 2015-11-11
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] With the continuous development of my country's economic construction and the country's increasing attention to the requirements of building fire protection and flame retardancy, waterproof materials directly used on roofs and other exposed parts are required to have good flame retardancy. The flame retardants in coatings are likely to cause a sharp increase in viscosity after storage. Even gel, cannot be stored for a long time

Method used

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  • Bi-component polyurethane waterproof coating and preparation method thereof
  • Bi-component polyurethane waterproof coating and preparation method thereof
  • Bi-component polyurethane waterproof coating and preparation method thereof

Examples

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Embodiment 1

[0044] This embodiment provides a two-component polyurethane waterproof coating, including: A component, B component,

[0045] The raw material formula for preparing the A component includes: aliphatic isocyanate, flame-retardant polyether polyol;

[0046] The raw material formula for preparing the B component includes: a chain extender and a catalyst.

[0047] This embodiment provides a method for preparing the above-mentioned two-component polyurethane waterproof coating, and the following steps are carried out according to the above-mentioned formula:

[0048] Preparation of component A:

[0049] a. Heat up the flame-retardant polyether polyol to 100°C and dehydrate it for 5 hours under the condition of a vacuum of -0.01MPa;

[0050] b. Lower the temperature to 70°C, add aliphatic isocyanate, and react at 80°C for 2.5 hours to form a prepolymer of flame-retardant polyether polyol and aliphatic isocyanate, and discharge to obtain component A;

[0051] Preparation of compo...

Embodiment 2

[0056] This embodiment provides a two-component polyurethane waterproof coating, including: A component, B component,

[0057] The raw material formula for preparing described A component comprises:

[0058] 10 parts by weight of aliphatic isocyanate,

[0059] 100 parts by weight of flame-retardant polyether polyol;

[0060] The raw material formula for preparing the B component includes:

[0061] 20 parts by weight of chain extender,

[0062] Catalyst 0.2 parts by weight.

[0063] The aliphatic isocyanate is isophorone diisocyanate, the flame retardant polyether polyol is a halogenated polyether polyol, the molecular weight of the flame retardant polyether polyol is 500-5000, and the flame retardant The hydroxyl value of the type polyether polyol is 40-400mgKOH / g, the chain extender is an amine aliphatic chain extender, and the catalyst is stannous octoate and lead isooctanoate (mass ratio: 1:2).

[0064] This embodiment provides a method for preparing the above-mentione...

Embodiment 3

[0073] This embodiment provides a two-component polyurethane waterproof coating, including: A component, B component,

[0074] The raw material formula for preparing described A component comprises:

[0075] 25 parts by weight of aliphatic isocyanate,

[0076] 20 parts by weight of flame-retardant polyether polyol;

[0077] The raw material formula for preparing the B component includes:

[0078]

[0079] The flame-retardant polyether polyol in the raw materials for preparing the A component in this embodiment has a flame-retardant effect, and at the same time, the flame-retardant polyether polyol can react with an aliphatic isocyanate to form a prepolymer. The prepolymer and the flame retardant in component B work together to prepare a highly flame-retardant two-component aliphatic polyurethane waterproof coating. The coating has excellent flame retardancy and weather resistance, bright colors, and good color retention. It is suitable for Direct waterproofing of exposed...

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Abstract

The invention discloses a bi-component polyurethane waterproof coating and a preparation method thereof. The coating comprises a component A and a component B, wherein a raw material formula for preparing the component A comprises aliphatic isocyanate and flame-retardant polyether polyol; a raw material formula for preparing the component B comprises a chain extender and a catalyst. The flame-retardant polyether polyol in the raw material formula for preparing the coating has flame retardance, so that a prepolymer formed by the flame-retardant polyether polyol and the aliphatic isocyanate has flame retardance, and then the bi-component polyurethane waterproof coating has flame retardance; because the prepolymer formed by the flame-retardant polyether polyol and the aliphatic isocyanate in the component A has flame retardance, the coating can achieve the same flame-retardant effect without a flame retardant in the component B, and then a phenomenon of separation of the flame retardant added in the component B is avoided or reduced, so that the flame retardance and stability of the coating are improved, the film-forming effect of the coating is good, and the storage time is long.

Description

technical field [0001] The invention belongs to the technical field of waterproof coatings, in particular to a two-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: one-component polyurethane waterproof coatings and two-component polyurethane waterproof coatings. Two-component polyurethane waterproof coatings are widely used because of their dense coating film, excellent performance, thick coating, simple production, and low price. ...

Claims

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Application Information

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IPC IPC(8): C09D175/08C08G18/48
Inventor 李红英李海章白志欣王倩倩
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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