Multifunctional urethane acrylate oligomer as well as synthesis method and application thereof

A technology of polyurethane acrylate and synthesis method, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of increasing the brittleness of the coating film and decreasing the adhesion, and achieve the effects of improving the brittleness, less side reactions, and simple synthesis route.

Active Publication Date: 2013-02-06
CHANGXING PHOTOELECTRIC MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Multifunctional urethane acrylate generally has a higher degree of crosslinking, enhanced water resistance and corrosion resistance, but also has defects such as increased brittleness of the coating film and decreased adhesion

Method used

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  • Multifunctional urethane acrylate oligomer as well as synthesis method and application thereof
  • Multifunctional urethane acrylate oligomer as well as synthesis method and application thereof
  • Multifunctional urethane acrylate oligomer as well as synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Synthesis of modified glycidyl ether

[0035] Add 1,4-cyclohexanedimethanol glycidyl ether, adipic acid and catalyst triphenylphosphine into the reactor and raise the temperature to form a homogeneous phase. Control the temperature at 120°C for 2.5 hours until the acid value drops to the initial acidity of the system. When the acid value is 3% of the initial acid value, the reaction is stopped; the temperature is lowered to 90 ° C, and then the acrylic acid solution dissolved with the polymerization inhibitor hydroquinone is added dropwise, and the reaction is carried out for 3.0 hours. When the acid value is reduced to 3% of the initial acid value, the reaction is stopped, and the reaction obtains Modified glycidyl ether (A) containing 4 hydroxyl groups and two double bonds in the molecular structure; the molar ratio of 1,4-cyclohexanedimethanol glycidyl ether to adipic acid is 2:1, acrylic acid to 1, The molar ratio of 4-cyclohexanedimethanol glycidyl ether is 1.0...

Embodiment 2

[0050] (1) Synthesis of modified glycidyl ether

[0051] Add ethylene glycol diglycidyl ether, sebacic acid and catalyst triphenylphosphine into the reactor to raise the temperature to form a homogeneous phase, control the temperature at 140°C for 3.0 hours, until the acid value drops below 2% of the initial acid value of the system stop the reaction; lower the temperature to 100°C, then dropwise add the acrylic acid solution dissolved in the polymerization inhibitor p-hydroxyanisole, react for 2.5h, stop the reaction when the acid value drops below 1% of the initial acid value, and obtain the molecular structure Modified glycidyl ether (A) containing 4 hydroxyl groups and two double bonds; the molar ratio of polyethylene glycol diglycidyl ether to sebacic acid is 2.05:1, acrylic acid and polyethylene glycol diglycidyl ether The molar ratio is 1.05: 1, the consumption of catalyst triphenylphosphine is 0.6% of the total mass of polyethylene glycol diglycidyl ether and sebacic a...

Embodiment 3

[0060] (1) Synthesis of modified glycidyl ether

[0061] Add propylene glycol diglycidyl ether, succinic acid and catalyst triphenylphosphine into the reactor to raise the temperature to form a homogeneous phase, control the temperature at 145°C for 2.5 hours, and stop when the acid value drops below 1% of the initial acid value of the system Reaction; lower the temperature to 105°C, then dropwise add an acrylic acid solution in which the polymerization inhibitor hydroquinone is dissolved, react for 3.0 hours, and stop the reaction when the acid value is reduced to less than 3% of the initial acid value, and the reaction obtains a molecular structure containing 4 A modified glycidyl ether (A) with two hydroxyl groups and two double bonds; the molar ratio of polypropylene glycol diglycidyl ether to succinic acid is 2.05:1, and the molar ratio of acrylic acid to polypropylene glycol diglycidyl ether is 1.1:1 , the consumption of catalyst triphenylphosphine is 0.8% of the total m...

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Abstract

The invention discloses a multifunctional urethane acrylate oligomer as well as a synthesis method and application thereof. The synthesis method comprises the following steps: synthesizing a modified glycidyl ether by adding a diglycidyl ether, a dibasic acid and a catalyst which is the triphenylphosphine into a reactor and subjecting the materials to reaction at 120-150 DEG C for 2.5-3.5 hours; synthesizing a semi-adduct by dropwise adding acrylic hydroxy ester and dibutyltin dilaurate into diisocyanate, and keeping the reaction temperature at 40-50 DEG C until the concentration of the isocyanate group is 48-52% of the initial concentration; and synthesizing a hydroxyl-group containing multifunctional urethane acrylate. In the process of synthesizing, by using the difference of raw materials and controlling the proportion of monomers for reaction, the soft and hard segments are introduced into the molecule structure so that the toughness is increased, and the brittleness of the coating film is improved. The hydroxyl groups are provided in the molecular structure design, which is helpful to the improvement of the adhesion of the coating film on the substrate in the later period.

Description

technical field [0001] The invention relates to a multifunctional polyurethane acrylate, in particular to a hydroxyl-containing multifunctional polyurethane acrylate and its synthesis method and application. Background technique [0002] Radiation-curable coatings have grown in popularity in recent years. Radiation curable coatings refer to coatings that can be cured almost immediately when exposed to electromagnetic radiation, eg in the ultraviolet region. The rapid curing of such coatings makes them attractive for a variety of applications. Radiation-curing coatings primarily proceed through a free-radical polymerization mechanism. Radiation curable materials must therefore contain groups capable of free radical curing. Typically these functional groups are unsaturated groups such as carbon-carbon double bonds, most commonly in the form of acrylate groups. [0003] Compared to epoxy acrylates, urethane acrylates have better adhesion and greater elasticity, offering enh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/32C08G18/08C09D175/14
Inventor 杨明雄周婵华涂伟萍王邦清
Owner CHANGXING PHOTOELECTRIC MATERIAL
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