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W/o emulsion, foam, and functional foam

A foam and functional technology, applied in transportation and packaging, thin material processing, etc., can solve the problems that foam does not have strength, difficult to control the size of spherical bubbles, etc., to achieve sufficient strength, excellent mechanical properties, excellent heat resistance Effect

Inactive Publication Date: 2015-06-10
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] However, when the W / O emulsion is prepared by the dry method as described above, especially when the W / O type HIPE is prepared by the dry method, there is a problem that various organic solvents, which are environmental load substances, are essential components.
[0018] In addition, in foams obtained from conventional W / O emulsions, it is difficult to control the size of spherical cells, and it is especially difficult to selectively obtain foams with small average pore diameters of spherical cells.
In addition, foams obtained from conventional W / O emulsions do not have sufficient strength

Method used

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  • W/o emulsion, foam, and functional foam
  • W/o emulsion, foam, and functional foam
  • W/o emulsion, foam, and functional foam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0364] Hereinafter, the present invention will be described based on examples, but the present invention is not limited to these examples. In addition, normal temperature means 23 degreeC.

[0365] (Molecular Weight Determination)

[0366] The weight average molecular weight was determined by GPC (gel permeation chromatography).

[0367] Device: "HLC-8020" manufactured by Tosoh Co., Ltd.

[0368] Column: "TSKgel GMH" manufactured by Tosoh Co., Ltd. HR -H(20)"

[0369] Solvent: THF

[0370] Standard material: polystyrene

[0371] (storage stability of emulsion)

[0372] Weigh about 30 g of the prepared W / O emulsion into a container with a capacity of 50 ml, observe the generation of free water after 1 hour, 3 hours, and 24 hours after preparation, and evaluate the static storage stability at room temperature.

[0373] ○: No free water even after 24 hours

[0374] △: No free water until 3 hours ago

[0375] ×: No free water up to 1 hour ago

[0376] (Measurement of ave...

manufacture example A-1

[0477] [Manufacturing Example A-1]: Preparation of Mixed Paste A-1

[0478]Into a reaction vessel equipped with a cooling tube, a thermometer, and a stirring device, a monomer containing 2-ethylhexyl acrylate (manufactured by Toagosei Co., Ltd., hereinafter abbreviated as "2EHA") as an ethylenically unsaturated monomer was charged. 173.2 parts by weight of the solution, 100 parts by weight of Adeka (registered trademark) Pluronic L-61 (molecular weight 2000, manufactured by ADEKA Co., Ltd., polyether polyol) as polyoxyethylene polyoxypropylene glycol, and urethane reaction 0.015 parts by weight of dibutyltin dilaurate (manufactured by Kishida Chemical Co., Ltd., hereinafter referred to as "DBTL") as a catalyst was added dropwise to hydrogenated xylylene diisocyanate (manufactured by Takeda Pharmaceutical Co., Ltd., Takenate 600, Hereafter abbreviated as "HXDI") 15.5 parts by weight, reacted at 65 degreeC for 4 hours. In addition, the usage-amount of a polyisocyanate component...

manufacture example A-2

[0479] [Manufacturing Example A-2]: Preparation of Mixed Paste A-2

[0480] In the preparation of mixed paste A-1 in Production Example A-1, 2EHA168 parts by weight were added, replacing Adeka (registered trademark) Pluronic L-61 as Adeka (registered trademark) Pluronic L-61 as polyoxyethylene polyoxypropylene glycol. 100 parts by weight of -62 (molecular weight 2500, manufactured by ADEKA Co., Ltd., polyether polyol), 0.014 parts by weight of DBTL, and 12.4 parts by weight of HXDI were added dropwise while stirring, and reacted at 65° C. for 4 hours. Then, 1.5 parts by weight of methanol (manufactured by Kishida Chemical Co., Ltd., special grade) was added dropwise, and reacted at 65° C. for 2 hours to obtain a hydrophilic polyurethane polymer / ethylenically unsaturated monomer mixed paste. The weight average molecular weight of the obtained hydrophilic polyurethane polymer was 15,000. With respect to 100 parts by weight of the obtained hydrophilic polyurethane-based polymer / ...

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Abstract

Provided is a W / O emulsion, including a continuous oil phase component and an aqueous phase component immiscible with the continuous oil phase component, in which: the continuous oil phase component includes a hydrophilic polyurethane-based polymer and an ethylenically unsaturated monomer; the hydrophilic polyurethane-based polymer includes a polyoxyethylene polyoxypropylene unit derived from polyoxyethylene polyoxypropylene glycol; and the polyoxyethylene polyoxypropylene unit includes 5 wt% to 25 wt% of polyoxyethylene. Also provided is a foam, including a hydrophilic polyurethane-based polymer, in which: the foam has an open-cell structure in which through-holes are present between adjacent spherical cells; the spherical cells each have an average pore diameter of less than 20 µm; the through-holes each have an average pore diameter of 5 µm or less; and the foam has surface openings each having an average pore diameter of 20 µm or less in a surface thereof.

Description

technical field [0001] The present invention mainly relates to a W / O type (water-in-oil type) emulsion, foam and functional foam excellent in storage stability. Background technique [0002] W / O type emulsion is known as W / O type HIPE (high internal phase emulsion) (high discontinuous phase emulsion) especially (for example, refer patent document 1). [0003] The industry studies the geometric configuration of the oil phase and the water phase of the emulsion by forming a W / O type HIPE in which the external oil phase contains a polymerizable monomer and polymerizing it. For example, it is reported that the geometric configuration of the oil phase and the water phase of the emulsion is studied by preparing a W / O type HIPE containing 90% of the water phase component and using a styrene monomer in the oil phase component, followed by polymerization (for example, See Non-Patent Document 1). In Non-Patent Document 1, it is reported that a W / O type HIPE is prepared by using a li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L75/04C08F2/32C08F283/00C08F290/06C08G18/00C08G18/48C08J9/28C08L75/08C08L75/16
CPCC08G18/4837C08G18/4854C08F2/32C08G18/672C08G18/755C08G18/757C08F283/006C08F290/067C08G18/0866C08G18/10C08L75/16C08G2101/00C08J2475/08C08J9/283C08J2205/05C08J2333/06C08J2201/026C08J2201/0504C08J2375/16Y10T428/249921C08L75/08C08G18/282C08G18/48C08F222/102C08L75/04C08F283/00C08F290/06C08G18/00C08J9/28
Inventor 平尾昭土井浩平伊关梓仲山雄介长崎国夫井本荣一
Owner NITTO DENKO CORP
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