Solvent-free polyurethane floor paint and preparation method thereof

A solvent-free polyurethane and floor paint technology, used in polyurea/polyurethane coatings, coatings, etc., can solve the problems of short gel time, short construction time, hard paint film, etc., achieve comprehensive mechanical properties and reduce construction costs , excellent mechanical properties

Inactive Publication Date: 2018-07-20
广东达尔新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The physical and chemical properties of its abrasion resistance and weather resistance are comprehensive, and the paint film is relatively full. However, the curing agents used are small molecule curing agents such as HDI and IPDI aliphatic isocyanate. When compounded with the main paint, the reaction speed is too fast, and the gel The time is short, and the construction time left for the construction personnel is very short, which is likely to cause waste of raw materials, increase the construction cost, and is prone to problems such as severe foaming and cracking and brittleness at low temperature
[0004] The Chinese patent application number 201510814221.7 discloses a "solvent-free elastic polyurethane

Method used

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  • Solvent-free polyurethane floor paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A solvent-free polyurethane floor paint, including main paint and curing agent;

[0030] Curing agent: polyether polyol 220A modified carbodiimide-uretonimine modified 4,4'-diphenylmethane diisocyanate, the isocyanate content is 12.5%.

[0031] The main paint includes 25 parts of polycaprolactone polyol, 28 parts of castor oil, 8 parts of 1,4-butanediol, 0.3 parts of polysiloxane defoamer, 0.2 part of polyacrylic acid leveling agent, and 0.1 part of bentonite , 0.2 parts of polycarboxylic acid dispersant, 34.2 parts of microsilica powder and 4 parts of talcum powder;

[0032] The preparation method of above-mentioned solvent-free polyurethane floor paint is as follows (each component content is added according to above-mentioned formula):

[0033] (1) Pour polyether polyol 220A into the kettle, stir and heat to 85°C, depressurize and evacuate to -0.13Mpa, and dehydrate for 1 hour;

[0034] (2) Cool down to 60°C, pour carbodiimide-uretonimine modified 4,4'-diphenylmeth...

Embodiment 2

[0041] A solvent-free polyurethane floor paint, including main paint and curing agent;

[0042] Curing agent: polyether polyol DL-1000D modified polymethylene polyaryl isocyanate, the isocyanate content is 13.2%.

[0043] The main paint includes 52 parts of castor oil modified polyol, 8 parts of diethylene glycol, 0.4 part of polyacrylic acid defoamer, 0.2 part of silicone leveling agent, 0.1 part of bentonite, 0.2 part of fatty acid dispersant, 30 parts of barium sulfate and 9.1 parts of heavy calcium powder;

[0044] The preparation method of above-mentioned solvent-free polyurethane floor paint is as follows (each component content is added according to above-mentioned formula):

[0045] (1) Pour the polyether polyol DL-1000D into the kettle, stir and heat to 90°C, depressurize and evacuate to -0.15Mpa, and dehydrate for 1.5 hours;

[0046] (2) Cool down to 60°C, pour polymethylene polyaryl isocyanate, stir and keep warm at 80-85°C for 2 hours;

[0047] (3) the isocyanat...

Embodiment 3

[0053] A solvent-free polyurethane floor paint, including main paint and curing agent;

[0054] Curing agent: polyether polyol 330N modified polymethylene polyaryl isocyanate, the isocyanate content is 14%.

[0055] The main paint includes 30 parts of polyester polyol SOVERMOL705, 25 parts of modified castor oil, 9 parts of dimethylthiotoluenediamine, 0.4 part of polyacrylic acid defoamer, 0.2 part of polyacrylic leveling agent, 0.2 part of hydrogenated castor oil part, 0.2 part of aliphatic amide dispersant, 35 parts of barium sulfate;

[0056] The preparation method of above-mentioned solvent-free polyurethane floor paint is as follows (each component content is added according to above-mentioned formula):

[0057] (1) Pour polyether polyol 330N into the kettle, stir and heat to 90°C, depressurize and evacuate to -0.15Mpa, and dehydrate for 2 hours;

[0058] (2) Cool down to 60°C, pour polymethylene polyaryl isocyanate, stir and keep warm at 80-85°C for 2 hours;

[0059] ...

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Abstract

The invention discloses solvent-free polyurethane floor paint, which is prepared from main paint and a curing agent, wherein the curing agent is a polyol-modified isocyanate obtained by adding 20-40 parts of polyol and 70-80 parts of isocyanate for carrying out a reaction; the main paint is prepared from 40-60 parts of hydroxyl-terminated resin, 0.1-0.4 part of defoaming agent, 0.1-0.2 part of flatting agent, 0.1-0.4 part of a dispersing agent, 0.1-0.3 part of an anti-settling agent, 30-40 parts of pigment filler, and 5-10 parts of a chain extender; the invention also discloses a preparation method of the solvent-free polyurethane floor paint. The polyether polyol modified isocyanate is used as the curing agent, so that the low temperature flexibility of a paint film is increased, but thehardness of the paint film is not affected, and the paint can pass a bending test at the low temperature of -30 DEG C; furthermore, by controlling the contents of all the components in the main paint,the gelation time of the paint film can reach 40-70 minutes after the main paint is compounded with the curing agent, so that the construction operation time is long, and the application range is broadened; furthermore, the waste of raw materials is reduced, and the construction cost is lowered.

Description

technical field [0001] The invention relates to the technical field of floor coatings, in particular to a solvent-free polyurethane floor paint and a preparation method thereof. Background technique [0002] Flooring materials refer to paving on the floor or other substrates and used as a material to protect the substrate. In the earliest days, most of them were paved with wooden boards, so they were called floor paint. With the continuous upgrading of science and technology, a variety of floor paints have appeared. Floor paint cannot fully express the overview of this type of coating system, so people prefer to call it floor paint later. Floor paint more appropriately demonstrates the diversity and functionality of modern floor materials. Now, the most mature and common floor paint on the market is epoxy floor paint, but epoxy materials are hard and brittle, and have poor weather resistance. In addition, the chemical chain of epoxy resin contains benzene rings, which are...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D7/65C09D7/61C08G18/79C08G18/66C08G18/42C08G18/48C08G18/32C08G18/36
Inventor 陈博远吴彦鑫杨金鑫皮鹏杨贤明
Owner 广东达尔新型材料有限公司
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