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Solvent-free polyurethane waterproof coating and preparation method thereof

A technology of solvent-free polyurethane and waterproof coating, applied in the direction of coating, etc., to achieve the effect of excellent bonding performance, low raw material cost, and simple and easy preparation process

Inactive Publication Date: 2017-08-11
温州月煌科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The latest standard GB / T 19250-2013 for polyurethane waterproof coatings also embodies the emphasis on environmental protection, and limits the above harmful substances. Among them, Class A stipulates that volatile organic compounds (VOC) ≤ 50 g / L, toluene, ethylbenzene , The total amount of xylene ≤ 1.0 g / kg, there have been many studies on solvent-free polyurethane waterproof coatings, but most of them are two-component, and there are almost no single-component solvent-free polyurethane waterproof coatings.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A solvent-free polyurethane waterproof coating, comprising the following raw materials in parts by weight: 30 parts of polyether polyol, 2 parts of nonionic emulsifier, 20 parts of diphenylmethane diisocyanate, 4 parts of talcum powder, 10 parts of liquid filler, acetyl 3 parts of tributyl citrate, 2 parts of catalyst, 1 part of pigment and filler, 2 parts of dispersant, 4 parts of curing agent.

[0022] The polyether polyol is composed of polyether DL-2000D and polyether EP-330N in a ratio of 2:1.

[0023] The hydroxyl value of the polyether polyol DL-2000D is 50, and the hydroxyl value of the polyether EP-330N is 30.

[0024] The catalyst is one of triethylenediamine, dibutyltin diacetate, dibutyltin dilaurate and stannous octoate or a mixture thereof.

[0025] The curing agent is one or more of polyisocyanate, methylene diphenylenediamine and epoxy resin.

[0026] The dispersant is one or more of liquid paraffin, polyethylene wax and polyethylene glycol.

[0027] ...

Embodiment 2

[0033] A solvent-free polyurethane waterproof coating, comprising the following raw materials in parts by weight: 40 parts of polyether polyol, 10 parts of nonionic emulsifier, 25 parts of diphenylmethane diisocyanate, 8 parts of talcum powder, 15 parts of liquid filler, acetyl 6 parts of tributyl citrate, 5 parts of catalyst, 3 parts of pigment and filler, 4 parts of dispersant, 8 parts of curing agent.

[0034] The polyether polyol is composed of polyether DL-2000D and polyether EP-330N in a ratio of 3:1.

[0035] The hydroxyl value of the polyether polyol DL-2000D is 55, and the hydroxyl value of the polyether EP-330N is 40.

[0036] The catalyst is one of triethylenediamine, dibutyltin diacetate, dibutyltin dilaurate and stannous octoate or a mixture thereof.

[0037] The curing agent is one or more of polyisocyanate, methylene diphenylenediamine and epoxy resin.

[0038] The dispersant is one or more of liquid paraffin, polyethylene wax and polyethylene glycol.

[0039...

Embodiment 3

[0045] A solvent-free polyurethane waterproof coating, comprising the following raw materials in parts by weight: 50 parts of polyether polyol, 15 parts of nonionic emulsifier, 30 parts of diphenylmethane diisocyanate, 12 parts of talcum powder, 20 parts of liquid filler, acetyl 9 parts of tributyl citrate, 8 parts of catalyst, 5 parts of pigment and filler, 7 parts of dispersant, and 10 parts of curing agent.

[0046] The polyether polyol is composed of polyether DL-2000D and polyether EP-330N in a ratio of 3:1.

[0047] The hydroxyl value of the polyether polyol DL-2000D is 60, and the hydroxyl value of the polyether EP-330N is 40.

[0048] The catalyst is one of triethylenediamine, dibutyltin diacetate, dibutyltin dilaurate and stannous octoate or a mixture thereof.

[0049]The curing agent is one or more of polyisocyanate, methylene diphenylenediamine and epoxy resin.

[0050] The dispersant is one or more of liquid paraffin, polyethylene wax and polyethylene glycol.

...

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PUM

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Abstract

The invention discloses a solvent-free polyurethane waterproof coating and a preparation method thereof. The coating is prepared from the following raw materials in parts by weight: 30-50 parts of polyether polyol, 2-15 parts of a non-ionic emulsifier, 20-30 parts of methylene diphenyl diisocyanate, 4-12 parts of talcum powder, 10-20 parts of a liquid filling, 3-9 parts of acetyl tributyl citrate, 2-8 parts of a catalyst, 1-5 parts of pigments and fillers, 2-7 parts of a dispersing agent and 4-10 parts of a curing agent. The coating has a waterproofing effect; and by adding polyether into the raw materials, the viscosity index of the coating is increased, and the stability of the coating is strong.

Description

technical field [0001] The invention belongs to the field of decoration materials, and in particular relates to a solvent-free polyurethane waterproof coating and a preparation method thereof. Background technique [0002] Polyurethane waterproof coating is a waterproof material for on-site construction made of polyurethane resin as the main raw material. Polyurethane (PU) waterproof coating has high tensile strength, good elasticity, large elongation at break, cold resistance, heat resistance, good aging resistance, excellent waterproof performance, long waterproof life, wide application range, simple construction and easy maintenance. And other advantages, it occupies a large proportion in waterproof coatings. Compared with GB / T 19250-2003 "Polyurethane Waterproof Coatings", "Technical Standards for Polyurethane Waterproof Coatings for Railway Bridges" has the advantages of short dry time, high tensile strength and high solid content. [0003] Patent CN 101418184A is a t...

Claims

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Application Information

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IPC IPC(8): C09D175/08C09D7/12C08G18/48C08G18/76C08G18/79C08G18/12C08G18/32C08G18/66
CPCC09D175/08C08G18/12C08G18/4045C08G18/4808C08G18/58C08G18/6685C08G18/7671C08G18/79C08L2205/03C08L2205/035C09D7/61C09D7/63C08G18/3243C08L91/06C08L23/06C08L71/02C08K3/34C08K5/11
Inventor 刘东升
Owner 温州月煌科技有限公司
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