Modified polyurethane waterproof paint as well as preparation method and construction method thereof

A polyurethane waterproof and polyurethane acrylate technology is applied in the field of modified polyurethane waterproof coatings and preparation methods and construction fields, and can solve the problems of affecting the aging resistance of products, easy yellowing of aromatic polyurethanes, and inability to meet waterproof requirements, etc. Short curing time, fast curing speed, less demanding effect

Active Publication Date: 2011-02-16
HUNAN NAISSANT PLASTIC ENGINEERING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, polyurethane waterproof coatings are mainly based on aromatic polyurethane elastomers. Through the reaction of -OH in polyether and -NCO in polyurethane, the reaction speed is relatively slow, and the surface dry time generally takes about 4 hours. 24 hours, and aromatic polyurethane is easy to yellow, and it is easy to age when exposed to the atmosphere for a long time. It cannot meet the waterproof requirements. The surface needs to be covered with concrete protection, which increases the dead load of the bridge and affects the service life of the bridge.
Although the polyurea waterproof coating reacts quickly and has good mechanical properties of the coating film, its adhesion to the substrate is poor, and the aromatic polyurethane component in it will also affect the aging resistance of the product

Method used

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  • Modified polyurethane waterproof paint as well as preparation method and construction method thereof

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Embodiment 1

[0029] The modified polyurethane waterproof coating according to the present embodiment includes three components A, B and C. Preparation of component A: add 18 parts by weight of methyl methacrylate, 2 parts of styrene, 20 parts of methyl acrylate and 35 parts of aliphatic urethane acrylate prepolymer into a high-speed disperser and disperse until the resin Dissolve completely, then add 10 parts of Shuangfei powder, 10 parts of talc powder, 1 part of N,N-dimethylaniline, 1 part of N,N-diethylaniline, and 3 parts of fumed silica into the high-speed disperser, The stirring speed is 800 rev / min, the dispersion time is 30min, and it is ground to a fineness below 40μm with a horizontal sand mill.

[0030] Preparation of component B: Add 25 parts of methyl methacrylate, 15 parts of methyl acrylate and 30 parts of aliphatic urethane acrylate prepolymer into a high-speed disperser and disperse until the resin is completely dissolved, and then 15 parts by weight Add 1 part of mica po...

Embodiment 2

[0034] The three-component spray-coated modified polyurethane waterproof coating according to this embodiment includes three components A, B and C. Preparation of component A: Add 18 parts of methyl methacrylate, 22 parts of methyl acrylate and 35 parts of aliphatic urethane acrylate prepolymer in parts by weight to disperse in a high-speed disperser until the resin is completely dissolved, and then 10 parts Add 1 part of silicon micropowder, 10 parts of talc powder, 1.5 parts of N,N-dimethylaniline, 0.5 part of cobalt isooctanoate, and 3 parts of bentonite into a high-speed disperser with a stirring speed of 600 rpm and a dispersion time of 45 minutes. The mill grinds to a fineness of 40 μm or less.

[0035] Preparation of component B: In parts by weight, add 25 parts of methyl methacrylate, 20 parts of butyl methacrylate and 30 parts of aliphatic urethane acrylate prepolymer into a high-speed disperser and disperse until the resin is completely dissolved , and then add 10 p...

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Abstract

The invention relates to a modified polyurethane waterproof paint as well as a preparation method and a construction method thereof. The waterproof paint mainly comprises three components A, B and C as follows by weight: the raw materials of the components A and B mainly comprise 25-45 parts of polyurethane acrylate prepolymer, 30-50 parts of active diluent, 15-30 parts of anti-seepage filler and 1-8 parts of auxiliaries, and the component C comprises 2-5 parts of peroxide initiator. The modified polyurethane waterproof paint has high physical mechanics performance and excellent ultraviolet-resistant performance, can be directly used for waterproof treatment of passenger special lines, and a protective layer is not needed on the surface of a waterproof layer. The preparation method of the waterproof paint is simple and environmental-friendly by using a double-component spraying device for construction, and comprises the steps of adding 2-5% of the component B of the component C into the component B, stirring evenly, proportioning according to the volume ratio of the component A to the mixture of the component B and the component C to be 1:1 during construction. The construction is simple and convenient without heating the materials.

Description

technical field [0001] The invention relates to a waterproof coating, in particular to a modified polyurethane waterproof coating and a preparation method and a construction method thereof, which are suitable for waterproof treatment on the surface of concrete bridges and steel bridges of passenger dedicated lines and expressways. Background technique [0002] In the prior art, polyurethane waterproof coatings are mainly based on aromatic polyurethane elastomers. Through the reaction of -OH in polyether and -NCO in polyurethane, the reaction speed is relatively slow, and the surface dry time generally takes about 4 hours. 24 hours, and aromatic polyurethane is easy to yellow, and it is easy to age when exposed to the atmosphere for a long time. It cannot meet the waterproof requirements. The surface needs to be covered with concrete protection, which increases the dead load of the bridge and affects the service life of the bridge. Although the polyurea waterproof coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12
Inventor 陈立斌姜其斌赵安然刘含茂谢勇董亚东李强军
Owner HUNAN NAISSANT PLASTIC ENGINEERING MATERIALS CO LTD
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