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Preparation method of aqueous polyurethane butyronitrile resin

A technology of polyurethane nitrile butadiene and water-based polyurethane is applied in the field of preparation of outdoor coatings for road users, and can solve the problems of low hydrolysis resistance of water-based polyurethane and the like

Active Publication Date: 2012-06-20
JIAXING HEXIN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Water-based polyurethane is a kind of water-based resin that has developed rapidly in recent years. It not only has the inherent chemical corrosion resistance, flexibility, thermal stability and other excellent properties of general polyurethane resin, but also is environmentally friendly, free from pollution, poisoning and fire The risk is small, and water-based polyurethane has been more and more widely used in the fields of synthetic leather and coatings, but the hydrolysis resistance of water-based polyurethane is low, and it is not suitable for outdoor coatings such as road glue.

Method used

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  • Preparation method of aqueous polyurethane butyronitrile resin

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preparation example Construction

[0018] The preparation method of this waterborne polyurethane nitrile resin comprises the following steps:

[0019] (1) Prepare polyurethane prepolymer:

[0020] (1) Vacuum dehydrate the macromolecular polyol at 85-120°C for half an hour, cool down to below 50°C, add polyisocyanate monomer, heat up to 75-95°C and react for 1-5 hours;

[0021] (2) Cool the material obtained in step (1) to 50°C, add a hydrophilic compound and a chain extender to the reaction system, and add a solvent to adjust the viscosity to 2000-4000cps, then raise the temperature to 70-85°C and continue the reflux reaction for 1- 5 hours, during the reaction process, add solvent appropriately to adjust the viscosity to 4000-8000cps, add hydroxyacrylate, continue the reflux reaction for 1-3 hours, and the reaction temperature is 70-75°C to obtain a polyurethane prepolymer;

[0022] (2) Prepare water-based polyurethane emulsion:

[0023] (1) Add the polyurethane prepolymer prepared in step (1) into a reactio...

Embodiment 1

[0040] (1) Add 200g polycarbonate diol (M W =2000), heated to 120°C, dehydrated in vacuum for half an hour, added 123.14g of dicyclohexyl diisocyanate (H 12 MDI), 0.15g dibutyltin dilaurate (DBTDL), be warming up to 90 ℃ and react for 2 hours, then add 13.5g dimethylolpropionic acid (DMPA), 7.2g1,4 butanediol (BDO), 70ml acetone, React at 80°C for one hour, add 0.15g of dibutyltin dilaurate (DBTDL) and 100g of acetone, react at 75°C for 3 hours, add 10g of hydroxy acrylate, and keep warm for 2 hours.

[0041] (2) Unload the reactants into the dispersing container and stir, cool down to 30°C and add 9.5g of triethylamine, pay attention to controlling the speed of the disperser, add 560g of water, after the emulsion is formed, add 12g of isopropylamine dissolved in 20g of water Phoronediamine (IPDA).

[0042] (three) get butadiene 50g, acrylonitrile 60g (CH 2 =CHCN) mixed evenly to make hydrocarbon phase, take sodium hydroxide (NaOH) 1g, sodium pyrophosphate (NaOH) 4 P 2 o ...

Embodiment 2

[0044] (1) Add 200g polycarbonate dibasic alcohol (M W =2000), heated to 120°C, dehydrated in vacuum for half an hour, added 123.14g of dicyclohexyl diisocyanate (H 12 MDI), 0.15g dibutyltin dilaurate (DBTDL), heated to 90°C for 2 hours, then added 13.5g dimethylolpropionic acid (DMPA), 7.2g 1,4 butanediol (BDO), 0.7g three Methylolpropane, 70ml acetone, react at 80°C for one hour, add 0.15g dibutyltin dilaurate (DBTDL) and 100g acetone, react at 75°C for 3 hours. Add 10 g of hydroxy acrylate, and keep the reaction for 2 hours.

[0045] (2) Unload the reactants into the dispersing container and stir, cool down to 30°C and add 9.5g of triethylamine, pay attention to controlling the speed of the disperser, add 560g of water, after the emulsion is formed, add 12g of isopropylamine dissolved in 20g of water Phoronediamine (IPDA).

[0046] (three) get butadiene 50g, acrylonitrile 60g (CH 2 =CHCN) mixed evenly to make hydrocarbon phase, take sodium hydroxide (NaOH) 1g, sodium py...

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Abstract

A preparation method of aqueous polyurethane butyronitrile resin comprises the following steps: firstly, preparing polyurethane prepolymer by macromolecular polyalcohol, isocyanate monomers, a hydrophilic group compound, a chain extender, a solvent and hydroxyl acrylic ester; secondly, adding a neutralizing agent, water emulsion, a water-based chain extender into the polyurethane prepolymer to prepare aqueous polyurethane emulsion; thirdly, conducting the steps of preparing a hydrocarbon phase and a water phase, polymerizing, degassing and the like, synthetizing the aqueous polyurethane emulsion, butadiene and acrylonitrile to obtain the aqueous polyurethane butyronitrile resin. As the aqueous polyurethane resin and nitrile rubber are grafted, the performance of the resin is improved, andthe prepared aqueous polyurethane butyronitrile resin has the advantages of hydrolysis resistance, weather resistance and good environmental performance, the coating prepared by the aqueous polyurethane butyronitrile resin has good chemical corrosion resistance, abrasion resistance and durability. The aqueous polyurethane butyronitrile resin can completely meet the requirement on outdoor road rubber.

Description

technical field [0001] The invention relates to a preparation method of outdoor paint for road use, and a preparation method of water-based polyurethane nitrile resin. Background technique [0002] Water-based polyurethane is a kind of water-based resin that has developed rapidly in recent years. It not only has the inherent chemical corrosion resistance, flexibility, thermal stability and other excellent properties of general polyurethane resin, but also is environmentally friendly, free from pollution, poisoning and fire The risk is small, and water-based polyurethane has been more and more widely used in the fields of synthetic leather and coatings. However, water-based polyurethane has low hydrolysis resistance and is not suitable for outdoor coatings such as road glue. Contents of the invention [0003] The invention aims at proposing a method for preparing a water-based polyurethane resin suitable for road use with strong hydrolysis resistance and weather resistance,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/00C08F236/12C08F220/44C08G18/44C08G18/42C08G18/32C08G18/34C08G18/12C09D151/08
Inventor 沈建峰徐欣欣石磊沈连根纪尚超范敏息锁柱
Owner JIAXING HEXIN CHEM IND
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