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Poly(propylene carbonate)-based polyurethane fireproof coating and preparation method thereof

A polypropylene carbonate-based water-based, polypropylene carbonate technology is applied in the field of polypropylene carbonate-based water-based polyurethane fire-retardant coatings and their preparation, and can solve the problem of low proportion of polyurethane fire-retardant coatings, high difficulty and large amount of consumption. And other issues

Active Publication Date: 2011-11-16
JIANGSU ZHONGKE JINLONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of coating is currently widely used, but water-based coatings have obvious shortcomings compared with solvent-based coatings in terms of water resistance and adhesion.
[0006] (2) Water-soluble resin type, among which urea-melamine resin is more representative, which has good comprehensive performance. This kind of resin has good fire resistance after adding flame retardant, but because of its high formaldehyde content, it is difficult to meet environmental protection requirements, so its Development prospects are not optimistic
[0007] (3) Inorganic binder type. This type of coating is based on Portland cement, magnesium hydroxide or other inorganic high-temperature binders, and is composed of expanded perlite, mineral wool and other chemical additives and water. The expansion type is mainly used, and its disadvantage is that the dosage is large, the coating is thick, and there are some insurmountable deficiencies in the physical and chemical properties of the coating, so its application is limited
[0008] Polyurethane coatings have excellent physical and mechanical properties, but their low oxygen-limiting index is only 17.3%, which is a flammable substance. Therefore, it is relatively difficult to develop polyurethane fire-resistant coatings. The proportion of polyurethane fire-resistant coatings on the market is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] (1) Preparation of waterborne polyurethane

[0049] (1) Add 100g of polypropylene carbonate diol with a molecular weight of 3500 into the reaction kettle, vacuum and dehydrate at 100°C for 40 minutes, and cool to 40°C;

[0050] (2) Add 6g of dimethylolpropionic acid and 0.2g of catalyst dibutyltin dilaurate into the reaction kettle under the protection of nitrogen, stir it evenly, and raise the temperature to 60°C;

[0051] (3) Add 20g of toluene diisocyanate TDI into the reaction kettle, the reaction kettle is heated to 70°C, and the reaction is kept warm for 3 hours. According to the viscosity of the reaction system, 15g of acetone can be added to adjust the viscosity of the reaction system during the reaction process;

[0052] (4) Add 2g of 1,4-butanediol to the reactor for chain extension, and the reactor is heated to 80 o C, heat preservation reaction for 2 hours;

[0053] (5) Cool down to room temperature, add 5.2g of γ-aminopropyltriethoxysilane KH-550 to the reaction kett...

Embodiment 2

[0063] (1) Preparation of waterborne polyurethane

[0064] (1) Add 100g of polypropylene carbonate diol with a molecular weight of 3500 into the reaction kettle, vacuum and dehydrate at 100°C for 60 minutes, and cool to 40°C;

[0065] (2) Add 8g of dimethylolpropionic acid and 0.2g of catalyst dibutyltin dilaurate into the reaction kettle under the protection of nitrogen, stir well, and raise the temperature to 60°C;

[0066] (3) Add 30g of 4,4'-diphenylmethane diisocyanate MDI to the reaction kettle, heat the reaction kettle to 80°C, keep the temperature for 4 hours, and add 20g of N methyl during the reaction process according to the viscosity of the reaction system Pyrrolidone adjusts the viscosity of the reaction system;

[0067] (4) Add 3g of 1,6-hexanediol to the reactor for chain extension, and the reactor is heated to 85 o C, heat preservation reaction for 3 hours;

[0068] (5) Cool down to room temperature, add 10g of N-β-aminohexyl-γ-aminopropylmethyldimethoxysilane 602 to th...

Embodiment 3

[0078] (1) Preparation of waterborne polyurethane

[0079] (1) Add 100g of polypropylene carbonate diol with a molecular weight of 3500 into the reactor, vacuum and dehydrate at 100°C for 30 minutes, and cool to 40°C;

[0080] (2) Add 2g of 1,2-dihydroxy-3-propanesulfonic acid and 0.1g of catalyst dibutyltin dilaurate into the reaction kettle under the protection of nitrogen, and after stirring uniformly, the temperature is raised to 60°C;

[0081] (3) Add 15g of isophorone diisocyanate IPDI to the reaction kettle, the reaction kettle is heated to 60°C, and the reaction is kept for 1 hour. According to the viscosity of the reaction system, 10g of acetone can be added to adjust the viscosity of the reaction system during the reaction process;

[0082] (4) Add 1g of ethylenediamine to the reaction kettle for chain extension, and the reaction kettle is heated to 65 o C, heat preservation reaction for 1 hour;

[0083] (5) Cool down to room temperature, add 1 g of 3-glycidoxypropyltrimethoxy...

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Abstract

The invention relates to a poly(propylene carbonate)-based polyurethane fireproof coating and a preparation method thereof. The poly(propylene carbonate)-based polyurethane fireproof coating is prepared from 100 parts of poly(propylene carbonate) which is the polymer of carbon dioxide and propylene oxide, 15-30 parts of aromatic diisocyanate, 0.1-0.2 part of catalyst, 0-3 parts of non-ionic chainextender containing active hydrogen, 2-8 parts of active-hydrogen-containing ionic chain extender capable of forming a hydrophilic group, 1-6 parts of neutralizer, 1-10 parts of silane coupling agent, 200-350 parts of adjuvant, 40-140 parts of flame retardant, 10-50 parts of bentonite and 1-3 parts of dispersant. The fireproof coating has the advantages of good water resistance, strong adhesion force, flame retardance reaching one level, superior fireproof performance, strong integrated application capability and bright application prospect, and can be applied to the surface coating of wood, steel and other substrates.

Description

technical field [0001] The invention relates to a polypropylene carbonate-based waterborne polyurethane fireproof coating and a preparation method thereof, belonging to the field of fine chemicals. technical background [0002] Fireproof coating refers to a type of coating that is applied on the surface of objects to prevent fire, prevent the spread of fire or isolate the source of fire, prolong the ignition time of the substrate or increase the thermal insulation performance to delay the structural damage time. With the development of science and technology, the industry is becoming larger and the building is clustered and high-rise. The application of fire retardant coatings is becoming more and more extensive, and people's requirements for them are getting higher and higher. Fire retardant coatings will have a wider application field. and development prospects. [0003] According to the purpose and object of use, different fireproof coatings can be divided into: decorati...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/18C08G18/44
Inventor 徐玉华
Owner JIANGSU ZHONGKE JINLONG CHEM
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