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Polyurethane/ acrylate hybrid emulsion and preparation method thereof

A technology of acrylate and acrylate, which is applied in the field of polyurethane/acrylate hybrid emulsion and its preparation, can solve the problems of insufficient water resistance and alcohol resistance, and achieve good chemical resistance and solvent resistance, and product stability Good, the effect of improving water resistance

Active Publication Date: 2017-05-10
烟台隆达树脂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PUA emulsion is still insufficient in water resistance and alcohol resistance when used as a high-grade coating base material.

Method used

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  • Polyurethane/ acrylate hybrid emulsion and preparation method thereof
  • Polyurethane/ acrylate hybrid emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] At a temperature of 85°C, add 10 parts of polyurethane microemulsion and 0.5 parts of a macromolecular polymerizable emulsifier into a dry container, then add an aqueous solution of ammonium persulfate (0.1 part of ammonium persulfate dissolved in 5 parts of water) and 8 parts Acrylic ester monomers were evenly dropped into the reactor from both sides within 2 hours. After the dropwise addition, the reaction was continued for 1.5 hours, and the temperature was taken out and cooled to room temperature. The pH of the system was adjusted to 7 with ammonia water to obtain a polymerizable Macromolecular emulsifiers are used in polyurethane / acrylate hybrid emulsions.

[0045] Wherein, the preparation technology of macromolecule polymerizable emulsifier is as follows:

[0046] Add a certain amount of 60 parts of water, 0.01 part of cobalt II oxime boron fluoride complex and 0.3 part of potassium persulfate into the reactor equipped with agitator. After fully stirring, deoxygen...

Embodiment 2

[0050] At a temperature of 75°C, add 10 parts of polyurethane microemulsion and 1 part of macromolecular polymerizable emulsifier into a dry container, and then add potassium persulfate aqueous solution (0.15 parts of potassium persulfate dissolved in 5 parts of water) and 5 parts Acrylic ester monomers were evenly dropped into the reactor from both sides within 2 hours. After the dropwise addition, the reaction was continued for 1.5 hours, and the temperature was taken out and cooled to room temperature. The pH of the system was adjusted to 7 with ammonia water to obtain a polymerizable Macromolecular emulsifiers are used in polyurethane / acrylate hybrid emulsions.

[0051] Wherein, the preparation technology of macromolecule polymerizable emulsifier is as follows:

[0052] Add a certain amount of 60 parts of water, 0.01 part of cobalt II oxime boron fluoride complex and 0.3 part of ammonium persulfate into the reactor equipped with agitator. Vacuumize the flask and fill it w...

Embodiment 3

[0056] At a temperature of 80°C, add 10 parts of polyurethane microemulsion, 0.5 parts of macromolecular polymerizable emulsifier, and then potassium persulfate (0.1 part of potassium persulfate dissolved in 5 parts of water) and 15 parts of acrylic acid in a dry container The ester monomers were evenly dropped into the reactor from both sides within 2 hours. After the dropwise addition, the reaction was continued for 1.5 hours, and the temperature was taken out and cooled to room temperature. The pH of the system was adjusted to 7 with ammonia water, and a polymerizable large Molecular emulsifiers are used in polyurethane / acrylate hybrid emulsions.

[0057] Wherein, the preparation technology of macromolecule polymerizable emulsifier is as follows:

[0058] Add a certain amount of 60 parts of water, 0.03 part of cobalt II oxime boron fluoride complex and 0.3 part of ammonium persulfate into the reactor equipped with agitator. Vacuumize the flask and fill it with nitrogen, re...

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Abstract

The invention discloses a polyurethane / acrylate hybrid emulsion and a preparation method thereof. A chain transfer catalysis method is used; water is used as a continuous phase; a vinyl hydrophilic monomer is used as a reaction object; divalent cobalt salt is used as a catalyst; a hydrophilic end molecular chain containing unsaturated double bonds at the tail end is prepared by a solution polymerization method; the vinyl hydrophilic monomer is added for continuous reaction; a block amphiphilic copolymer with reserved double bonds at the tail end is prepared. Then, the block amphiphilic copolymer is added into a vinyl terminated polyurethane macromolecule prepolymer using an inert acrylate monomer as a continuous phase; an initiating agent is added for initiating a polymerizable macromolecule surfactant, the acrylate monomer and polyurethane macromolecules to mix for copolymerization; in the reaction process, a polymerizable emulsifying agent is fixed on an emulsion colloidal particle surface through double bond coating, so that the migration effect of the emulsifying agent on the surface can be avoided in an emulsion drying process; the emulsion is ensured to have good waterproof performance.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of polyurethane preparation, in particular to a polyurethane / acrylate hybrid emulsion and a preparation method thereof. [0003] 【Background technique】 [0004] With the improvement of environmental laws and regulations and the strengthening of people's awareness of environmental protection, the scope of use of solvent-based coatings is limited, and research on water-based coatings is increasingly valued. Waterborne polyurethane is a film-forming resin with excellent performance. In the 1970s, the self-emulsification preparation method of polyurethane emulsion was developed. The current research focuses on its modification, among which acrylate modified polyurethane is the most common. The water-based polyurethane-acrylate (PUA) prepared by the copolymerization method comprehensively utilizes the excellent weather resistance of acrylate and the advantages of polyurethane wear-resistant and excellent ...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D151/00C08F265/06C08F220/10C08G18/08C08G18/34C08G18/38C08G18/42C08G18/67C08G18/66
CPCC08F265/06C08G18/0823C08G18/348C08G18/3857C08G18/4202C08G18/4238C08G18/4277C08G18/672C09D175/14C08L51/003C08F220/10C08G18/6659
Inventor 费贵强杨小芳王海花高文骥沈一丁李晓扬
Owner 烟台隆达树脂有限公司
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