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High-barrier antibacterial polycaprolactone emulsion as well as preparation method and application thereof

A polycaprolactone, high-barrier technology, used in polyester coatings, coatings, biocide-containing paints, etc., can solve the problems of water resistance and reduced barrier performance, achieve good water resistance, improve barrier performance, improve The effect of yield

Pending Publication Date: 2021-12-14
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PVOH emulsion is not water-resistant after coating, and the barrier performance will be seriously reduced under high humidity conditions

Method used

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  • High-barrier antibacterial polycaprolactone emulsion as well as preparation method and application thereof
  • High-barrier antibacterial polycaprolactone emulsion as well as preparation method and application thereof
  • High-barrier antibacterial polycaprolactone emulsion as well as preparation method and application thereof

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preparation example Construction

[0043] The present invention provides a kind of preparation method of the high-barrier antibacterial polycaprolactone emulsion described in above-mentioned technical scheme, comprising:

[0044] mixing L-lactide, solvent, caprolactone, epoxidized soybean oil, emulsifier and initiator to obtain a pre-emulsified emulsion;

[0045] mixing the pre-emulsified emulsion with water to obtain an emulsified emulsion;

[0046] reacting the emulsified emulsion to obtain a reaction product;

[0047] The reaction product is mixed with an antioxidant and an antibacterial agent to obtain a high-barrier antibacterial polycaprolactone emulsion.

[0048] In the present invention, the preparation method of the pre-emulsified emulsion preferably comprises:

[0049] Add L-lactide into the solvent and heat to dissolve, then add ε-caprolactone, then add epoxidized soybean oil, emulsifier, and initiator in sequence, and carry out stirring and pre-emulsification to obtain a pre-emulsified emulsion. ...

Embodiment 1

[0069] In parts by weight, add 10 parts of L-lactide to 20 parts of ethyl acetate solvent, heat to 55°C and stir to dissolve, add the dissolved solution to 100 parts of ε-caprolactone, and then add 3 parts of cyclic Oxygenated soybean oil, 0.6 part emulsifier 0.3 parts of organic phosphazene superbase CTPB were sequentially added to the solution for pre-emulsification with stirring at a stirring speed of 400 rpm to obtain a pre-emulsified emulsion.

[0070] Add 360 parts of deionized water into the reaction kettle, slowly add the pre-emulsified emulsion while stirring, the stirring speed is 200 rpm, and the adding time is 15 minutes to obtain the emulsified emulsion.

[0071] The reactor was evacuated to below 1Kpa, and nitrogen gas was introduced, and this was repeated 5 times.

[0072] Under nitrogen condition, heat to 65°C and react for 2.5 hours to obtain an emulsion.

[0073] After the emulsion was cooled to normal temperature, 0.9 part of tea polyphenols and 1 part of...

Embodiment 2

[0075] In parts by weight, 15 parts of L-lactide was added to 25 parts of ethyl acetate solvent, heated to 55°C and stirred to dissolve, the dissolved solution was added to 100 parts of ε-caprolactone, and then 3.5 parts of cyclic Oxygenated soybean oil, 0.6 part emulsifier 0.4 parts of organic phosphazene superbase CTPB were sequentially added into the solution for pre-emulsification with stirring at a stirring speed of 400 rpm to obtain a pre-emulsified emulsion.

[0076] Add 400 parts of deionized water into the reaction kettle, slowly add the pre-emulsified emulsion while stirring, the stirring speed is 200 rpm, and the adding time is 15 minutes to obtain the emulsified emulsion.

[0077] The reactor was evacuated to below 1Kpa, and nitrogen gas was introduced, and this was repeated 5 times.

[0078] Under nitrogen condition, heat to 68°C and react for 2.2 hours to obtain an emulsion.

[0079] After the emulsion was cooled to normal temperature, 1.2 parts of phytic acid...

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Abstract

The invention provides a high-barrier antibacterial polycaprolactone emulsion. The high-barrier antibacterial polycaprolactone emulsion is prepared from the following components in parts by weight: 100 parts of epsilon-caprolactone, 5 to 20 parts of L-lactide, 2-10 parts of oxidized soybean oil, 0.5 to 2 parts of an antioxidant, 0.1 to 1.5 parts of an antibacterial agent, 0.1 to 0.6 part of an initiator, 10 to 20 parts of a solvent, 0.2 to 2.0 parts of an emulsifier and 250 to 500 parts of water. The high-barrier emulsion for coating produced by using degradable materials not only can have very high barrier performance after being coated, but also can be degraded into water and carbon dioxide under natural conditions without polluting the environment, and a main chain in the emulsion is polycaprolactone, is a hydrophobic material and has good water resistance. The invention also provides a preparation method and application of the high-barrier antibacterial polycaprolactone emulsion.

Description

technical field [0001] The invention belongs to the technical field of polycaprolactone emulsion, and in particular relates to a high-barrier antibacterial polycaprolactone emulsion and a preparation method and application thereof. Background technique [0002] Since 2021, more and more domestic plastic ban plans have been introduced, resulting in more and more attention to the research and development of degradable plastics in the future. In the high-barrier coated packaging film industry, there are more and more research and development related to the degradation requirements. It is conceivable that in the near future, the high-barrier coating packaging industry will also enter the degradable era, and the demand for high-barrier degradable emulsions will also come. [0003] The PVDC and PVOH emulsions used for conventional high-barrier coatings in the prior art are both non-degradable, and the PVDC emulsion cannot be degraded and recycled after coating, and produces toxic...

Claims

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Application Information

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IPC IPC(8): C09D167/04C09D5/14C09D7/63C08G63/08C08G63/78
CPCC09D167/04C09D5/14C09D7/63C08G63/08C08G63/78C08L2201/06C08L2201/14C08G2150/00C08L91/00C08L5/08C08K3/042C08K5/1545C08K5/521C08K5/1535
Inventor 冯亮黎坛王恩飞李朝辉
Owner HAINAN SHINER IND
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