Acrylic acid-epoxy resin modified aqueous polyurethane preparation method

A technology of water-based polyurethane and epoxy resin, which is applied in the field of acrylic/epoxy resin modified water-based polyurethane, can solve the problems of limiting the promotion and application of water-based polyurethane, poor weather resistance, heat resistance, and low bonding strength, and achieves Effects of protecting physical and mental health, high weather resistance, and excellent hardness

Inactive Publication Date: 2006-12-27
山东圣光化工集团有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because it is a pure polyurethane aqueous dispersion, there are disadvantages such as poor weather resistance, heat resistance, and low bonding strength, which limits the promotion and application of water-based polyurethane. Therefore, the cross-linking modification of water-based polyurethane has become the field research hotspots
[0003] At prese

Method used

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  • Acrylic acid-epoxy resin modified aqueous polyurethane preparation method
  • Acrylic acid-epoxy resin modified aqueous polyurethane preparation method
  • Acrylic acid-epoxy resin modified aqueous polyurethane preparation method

Examples

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Effect test

Embodiment 1

[0043] Example 1: 35 kilograms of polyether polyols were added to the reactor, heated to 60 ° C, under the condition of vacuum degree of 0.09 Mpa, dehydration treatment was performed for 0.6 hours, 23 kg of TDI was added, and the reaction was carried out at 90 ° C for 2-3 hours (NCO% was 10.6 %), add 3.5 kilograms of dimethylol propionic acid, cool to 85 ℃ and react for 1-2 hours (NCO% is 5.3%), add 3.8 kilograms of 1,4-butanediol, 8 kilograms of acrylic acid modified epoxy resins, 20 kilograms of butyl acrylate and 32 kilograms of acetone were mixed with a dispersion solution, and reacted for 2-4 hours (NCO% was 0.86%) at 65° C. to obtain a modified polyurethane resin, whose structural formula was I. Add the modified polyurethane resin to the mixing tank, control the speed at 900 rpm, add 4.1 kg of triethylamine, 200 kg of distilled water, 3 kg of isophorone diamine, and 2.9 kg of sodium persulfate at a room temperature of 3°C to initiate polymerization React for 0.5-1.5 hour...

Embodiment 2

[0049] Example 2: Add 60 kg of polyester polyol to the reactor, heat up to 68°C, dehydrate for 1 hour under the condition of vacuum degree of 0.09Mpa, add 32 kg of TDI, and react for 2-3 hours at 85°C (NCO% is 9.8%) ), add 6.5 kg of dimethylol propionic acid, react for 1-2 hours (NCO% is 4.9%) at 75°C, add 8 kg of ethylene glycol, 15 kg of acrylic modified epoxy resin, and 35 kg of acrylic acid monomer , 42 kilograms of acetone mixed dispersion, reacted 2-4 hours (NCO% is 0.91%) under the condition of 65 ℃ to obtain the modified polyurethane resin, the modified polyurethane resin was added to the mixing tank, 900 rev / min of rotating speed, room temperature Stir and disperse at 15°C, add 9 kg of triethylamine, 289 kg of distilled water, add 2 kg of isophorone diamine, 1.5 kg of potassium persulfate, stir and disperse to initiate polymerization for 0.5-1.5 hours to obtain modified polyurethane Aqueous dispersion, the modified polyurethane aqueous dispersion is added to the preci...

Embodiment 3

[0051] Embodiment 3: 80 kilograms of polycaprolactone polyols are put into reactor, 75 ℃, after dehydration treatment under 0.09Mpa condition for 40 minutes, add MDI36 kilograms, react 2-3 hours under 78 ℃ of conditions (NCO% is 11.3%), Add 7.8 kg of dimethylol propionic acid and 6.4 kg of 1,4-butanediol, react for 1-2 hours at 82°C (NCO% is 4.65%), then add 16 kg of acrylic acid modified epoxy resin, butyl acrylate A dispersion of 30 kg of a blend of ester and acrylic acid and 50 kg of acetone is reacted at 76°C for 2-4 hours (NCO% is 0.68%) to obtain a modified polyurethane resin. Add the modified polyurethane resin into the mixing tank with a rotation speed of 1200 rpm and a room temperature of 20°C. Stir and disperse into 6.8 kg of triethylamine, 264 kg of distilled water, 1.6 kg of diethylenetriamine, and 1.5 kg of sodium persulfate, and continue Dispersion initiates polymerization for 0.5-1.5 hours to obtain a modified polyurethane aqueous dispersion. The modified polyu...

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Abstract

The invention relates to a method for producing acroleic acid/ epoxide resin modified aqueous polyurethane, which employs processes of interpenetrating polymer network and grafting which comprises following steps: (1) pre-polymerization for polyatomic alcohol and polyisocyanates, adding hydrophilic chain propagation agent chain propagation reaction and getting preploymer containing hydrophilic group; (2) adding mixture of polyhydroxy compound, acroleic acid modified epoxide resin and acrylic ester monomer containing dissolvent into reaction system for second chain propagation reaction; (3) neutralizing by adding neutralization agent, adding water for emulsification, adding polyamine for chain propagation; (4) polymerization for free radical emulsion; (5) distilling to remove dissolvent after reaction and getting polyurethane hybrid water dispersion which taking acrylic resin as nucleus and acroleic acid/ epoxide resin modified aqueous polyurethane as shell. The product is characterized by strong weatherability, good chemical product resistance and water resistance, excellent hardness, glossiness, storage stability, mechanics performance and comprehensive property.

Description

technical field [0001] The invention relates to a manufacturing method of waterborne polyurethane, in particular to a manufacturing method of acrylic acid / epoxy resin modified waterborne polyurethane. Background technique [0002] Water-based polyurethane has the advantages of non-combustibility, non-toxicity, no pollution to the environment, energy saving, etc., and has excellent properties such as high strength, wear resistance, and safety in use. Therefore, it has been widely used and has become an important development direction at home and abroad. However, so far, my country's industrialized water-based polyurethane has few varieties and low output. It is basically some aromatic pure polyurethane emulsion. General performance leather finishing and fabric treatment. By closely monitoring the NCO content of the pre-polymer of water-based polyurethane before and after dispersing into water or adopting the post-chain extension process, the water resistance and solvent resis...

Claims

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Application Information

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IPC IPC(8): C08G18/83C08G18/10C08F283/10
Inventor 崔新荣
Owner 山东圣光化工集团有限公司
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