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Polyurethane oligomer taking vinyl ether as end group and synthesis method

A technology of polyurethane oligomers and hydroxyalkyl vinyl ethers, which is applied in the field of UV-curable coatings to achieve convenient storage and transportation, high yield and good solubility

Inactive Publication Date: 2012-07-11
HUBEI GURUN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are currently no oligomers of polyurethane containing vinyl ether linkages on the market

Method used

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  • Polyurethane oligomer taking vinyl ether as end group and synthesis method
  • Polyurethane oligomer taking vinyl ether as end group and synthesis method
  • Polyurethane oligomer taking vinyl ether as end group and synthesis method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The synthetic method of oligomer A-1:

[0039] In a four-neck flask equipped with a stirrer, a thermometer, a dropping funnel, and a reflux condenser, according to the molar ratio isophorone diisocyanate diisocyanate (IPDI): ethylene glycol: 4-hydroxybutyl vinyl ether (HBVE ) were added in a ratio of (n+1):n:2. Add IPDI first, fill the bottle with N 2 For protection, add ethylene glycol to the dropping funnel. Slowly add dropwise, after the dropwise addition, react at room temperature for 4h. Add 4 drops of DBTDL (dibutyltin dilaurate) (0.1ml per drop), then raise the temperature to 60°C, and slowly add HBVE (4-hydroxybutyl vinyl ether) diluted with solvent tetrahydrofuran dropwise. It is 5 times that of HBVE, and the reaction is continued for 5 hours after the dropwise addition is completed. After the reaction, the THF was removed by rotary evaporation, and the final product was viscous liquid.

Embodiment 2

[0041] The synthetic method of oligomer A-2:

[0042] Replace the ethylene glycol in [Example 1] with 1,3 propanediol, and the remaining reagents and consumption are the same as [Example 1].

Embodiment 3

[0044] The synthetic method of oligomer A-3:

[0045] Replace the ethylene glycol in [Example 1] with polypropylene glycol, and the remaining reagents and consumption are the same as [Example 1].

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Abstract

A polyurethane oligomer taking vinyl ether as an end group and a synthesis method are disclosed, wherein the structural formula (I) of the compound is FORMULA; and the synthesis method comprises the following process steps of: dripping polyol in diisocyanate and mechanmically stirring; controlling a temperature to be 0-90 DEG C and reacting for 1-6 hours; adding a catalyst and heating to 60-120 DEG C after the reaction is finished; dripping the mixed solution of hydroxyalkyl vinyl ether diluted by a solvent; and continuing to react with stirring for 2-7 hours after the dripping is finished. The synthesis method has the advantages of being simple in process, high in production rate, low in cost, and reduced in environmental pollution. The product prepared by the method can be used as a coating without being purified, as well as is great in dissolubility, simple in synthesis process, easy in control for conditions, and excellent in practical application value.

Description

technical field [0001] The invention relates to the technical field of ultraviolet curing coatings, in particular to a polyurethane oligomer whose terminal group is vinyl ether and a synthesis method thereof. Background technique [0002] Since 1968, when West Germany Bayer Company published the application of light energy to curing coating film technology, the research and development of ultraviolet light curing (hereinafter referred to as UV curing) adhesives has also developed rapidly. my country began to research and develop UV curing technology in the early 1970s. The curing principle is that under ultraviolet radiation, the photoinitiator in the liquid photocurable adhesive absorbs energy and is excited to generate free radicals or cations, which initiates a polymerization reaction, forms a cured body structure, and cures the material. UV-curable coatings have many advantages that traditional coatings cannot match: high energy utilization rate, suitable for heat-sensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/32C08G18/48C08G18/42C07C269/02C07C271/24C07C271/28C07C271/10C09D4/00
Inventor 邹应全冯萍何长华
Owner HUBEI GURUN TECH CO LTD
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