Hydroxyl silicone oil modified polyurethane resin, coating and preparation method of hydroxyl silicone oil modified polyurethane resin

A technology of polyurethane resin and hydroxy silicone oil, which is applied in the field of polyurethane resin, can solve the problems of affecting the permeability of the paint film, difficulty in dissolving and uniformly dispersing nano-silica, unsuitable hardness, and scratch resistance, etc., to achieve excellent hydrophobicity, Excellent high temperature resistance, high reactivity effect

Inactive Publication Date: 2021-06-11
SHENZHEN ANPIN SILICONE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent CN201110028348.8 discloses a method for preparing a one-component high heat-resistant water-based polyurethane adhesive. Nano-silica is used to modify the water-based polyurethane to prepare a single-component adhesive with a heat-resistant temperature above 160°C. Nano-silica is difficult to dissolve and disperse evenly during the preparation process, and it affects the permeability of the paint film during the curing film formation process, which has limitations in application
[0006] Patent CN101633828A discloses a method for preparing a high heat-resistant water-based polyurethane adhesive. By introducing a silane coupling agent for secondary chain extension and compounding functional polyvinyl alcohol, a high heat-resistant water-based polyurethane adhesive is obtained, but polyethylene Alcohol is soft, not suitable for wood varnishes that require high hardness, scratch resistance, etc.

Method used

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  • Hydroxyl silicone oil modified polyurethane resin, coating and preparation method of hydroxyl silicone oil modified polyurethane resin
  • Hydroxyl silicone oil modified polyurethane resin, coating and preparation method of hydroxyl silicone oil modified polyurethane resin
  • Hydroxyl silicone oil modified polyurethane resin, coating and preparation method of hydroxyl silicone oil modified polyurethane resin

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Experimental program
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Embodiment 1

[0066] Under the condition of nitrogen protection, 52g of ethylene glycol monoallyl ether, 55g of buffer solution, 150g of toluene, 500g of hydrogen-terminated silicone oil and 0.26g of 5000ppm Castel platinum catalyst were reacted at 55°C for 6h, then cooled to room temperature, and added After washing with deionized water for 5 times, move it into a separatory funnel to stand for stratification, collect the upper organic layer, and then distill the organic layer under reduced pressure to remove solvent, unreacted reactants or low molecular by-products to obtain hydroxyl silicone oil with a yield of 98 %, the tested viscosity is 20mPa·s, the number average molecular weight is 1100, the hydroxyl content is 50mgKOH / g, and the hydrogen content is 0 after testing; the buffer solution configuration method is as follows: take 50ml0.2mol / L o-phthalic Diformic acid ethanol solution is mixed with 2.6ml of 0.2mol / L hydrogen chloride ethanol solution, and then diluted with ethanol to for...

Embodiment 2

[0070] Under the condition of nitrogen protection, 88g of trimethylolpropane monoallyl ether, 132g of buffer solution, 150g of toluene, 500g of hydrogen-terminated silicone oil and 4.4g of 5000ppm Castel platinum catalyst were reacted at 90°C for 6h, and then cooled to room temperature , add deionized water to wash 5 times, move it into a separatory funnel and let it stand for stratification, collect the upper organic layer, and then distill the organic layer under reduced pressure to remove solvent, unreacted reactants or low molecular by-products to obtain hydroxy silicone oil, the yield It is 99%, its viscosity is 86mPa·s after testing, the number average molecular weight is 1200, the hydroxyl content is 93mgKOH / g, its hydrogen content is 0 after testing; the configuration method of the buffer solution is: take 38ml of 0.1mol citric acid The ethanol solution was mixed with 162 ml of 0.1 mol / L sodium citrate glycerin solution to obtain a 200 ml buffer solution, and the pH val...

Embodiment 3

[0073] Under the condition of nitrogen protection, 66.7g of glycerol allyl ether, 70g of buffer solution, 150g of toluene, 500g of hydrogen-terminated silicone oil and 2g of 5000ppm Castel platinum catalyst were reacted at 80°C for 6h, then cooled to room temperature, and washed with deionized water After 5 times, move it into a separatory funnel and let it stand for stratification, collect the upper organic layer, and then distill the organic layer under reduced pressure to remove solvent, unreacted reactants or low molecular by-products to obtain hydroxy silicone oil with a yield of 99%. The viscosity is 80mPa·s, the number average molecular weight is 1150, the hydroxyl content is 97mgKOH / g, and the hydrogen content is 0 after testing; the buffer solution configuration method is: take 49ml of 0.2mol / L sodium acetate ethanol solution Mix with 51ml of 0.3mol / L acetic acid ethanol solution to obtain 100ml of buffer solution, the pH value is 4.6 at 37°C.

[0074] The preparation...

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Abstract

The present invention discloses a Hydroxyl silicone oil modified polyurethane resin, a coating and a preparation method of hydroxyl silicone oil modified polyurethane resin. The preparation method of the resin comprises the following steps: mixing polyester polyol, polyisocyanate, hydroxyl silicone oil and a solvent, then carrying out heating reaction, adding a chain extender A and a cosolvent, then adding a chain extender B, carrying out constant-temperature reaction, carrying out neutralization, then carrying out cooling, adding water and a chain extender C for reaction, and removing the solvent after the reaction is completed to obtain hydroxyl silicone oil modified waterborne polyurethane resin, wherein the hydroxyl silicone oil includes a polysiloxane having a hydroxyl group attached to silicon at only one end. The polyurethane coating prepared by the invention has good glossiness and heat resistance.

Description

technical field [0001] The invention relates to a polyurethane resin, which is formulated into a polyurethane coating, which has good glossiness and heat resistance. [0002] technical background [0003] Water-based polyurethane is a polymer material that uses water instead of organic solvents as the dispersion medium. It has the advantages of good film-forming properties, high bonding strength, high gloss, strong corrosion resistance, excellent mechanical properties, and environmental protection. It is an alternative to solvent-based polyurethane. The inevitable trend. [0004] However, the current water-based polyurethane transparent varnish for wood protection generally has the problems of low heat resistance and high activation temperature. Due to the characteristics of carbamate in the molecular structure of a single water-based polyurethane material, the heat resistance temperature is usually below 80°C, which cannot meet the dry heat resistance requirements of furnit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/12C08G18/34C08G18/32C08G18/40C08G18/42C08G18/61C08G18/66C09D175/06
CPCC08G18/12C08G18/6659C08G18/4238C08G18/4009C08G18/61C08G18/348C08G18/3857C09D175/06
Inventor 唐建振彭派潜吴光飞游正林陈巧站宾家辉
Owner SHENZHEN ANPIN SILICONE MATERIAL
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