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

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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 use

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

Experimental program
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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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