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Method for rapidly preparing double-layer structure foam with low residual monomer content, foam material and application thereof

A double-layer structure and foam material technology, applied in the field of foam materials, can solve the problems of poor operability and low foam transparency, and achieve the effects of rapid absorption, large cell size and strong operability

Active Publication Date: 2021-09-24
WANHUA CHEM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] But the inventor found in actual operation, according to the 4 mm thick emulsion coating described in the patent after thermal curing, because the foam transparency obtained after curing is very Low, UV light irradiation can only cure the residual monomers on the surface, and cannot penetrate such a thick foam layer so that the unreacted monomers inside the foam can participate in the photocuring reaction, and this process adopts the reaction process of heat curing first and then UV curing. The reaction time is not short. Referring to the thickness of the conventional HIPE emulsion coating mentioned above, the process of UV curing to remove residues is poor in operability

Method used

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  • Method for rapidly preparing double-layer structure foam with low residual monomer content, foam material and application thereof
  • Method for rapidly preparing double-layer structure foam with low residual monomer content, foam material and application thereof
  • Method for rapidly preparing double-layer structure foam with low residual monomer content, foam material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0137] A) Preparation of lower HIPE emulsion

[0138] Calcium chloride (60.0 grams) was dissolved in 1000 milliliters of deionized water to obtain an aqueous phase, which was maintained at 70° C.; mixed isooctyl acrylate (13.5 grams), styrene (6.0 grams), ethylene glycol dimethyl Acrylate (5.0 g) was uniformly dispersed with Span20 (2 g), Span 80 (3.5 g), and 1173 (1.9 g) to obtain a uniform oil phase.

[0139] The resulting oil phase is placed in a 2-liter volume stainless steel interlayer insulation dispersing tank, and the oil phase is stirred using a disperser with a diameter of 8 cm. The oil phase is stirred at a speed of 300 rpm at the beginning, and at the same time, the oil phase is stirred for 10 minutes. Add all the water phase within a certain period of time. During the addition of the water phase, the dispersion tank has been kept at 70°C. With the addition of the water phase, the stirring speed gradually increases. Layered high internal phase emulsion.

[0140] ...

Embodiment 2

[0148] A) Preparation of lower HIPE emulsion

[0149] Calcium chloride (40.0 grams), photoinitiator 2959 (purchased from Bailingwei, 0.1 grams) were dissolved in 600 milliliters of deionized water to obtain an aqueous phase, and the aqueous phase was maintained at 70°C; mixed isooctyl acrylate (20.0 grams), Divinylbenzene (55%, 5.0 g) was stirred and dispersed with Cithrol DPHS (PEG-30 dipolyhydroxystearate, purchased from CRODA, 5.0 g) to obtain a uniform oil phase.

[0150] The resulting oil phase is placed in a 2-liter volume stainless steel interlayer insulation dispersing tank, and the oil phase is stirred using a disperser. Add all the water phase within a certain period of time. During the addition of the water phase, the dispersion tank has been kept at 65°C. With the addition of the water phase, the stirring speed gradually increases. Layered high internal phase emulsion.

[0151] B) Preparation of upper HIPE emulsion

[0152] Calcium chloride (50.0 grams), erythor...

Embodiment 3

[0159] A) Preparation of lower HIPE emulsion

[0160] Calcium chloride (10.0 grams) was dissolved in 500 milliliters of deionized water to obtain an aqueous phase, which was maintained at 80° C.; mixed with isooctyl acrylate (25.0 grams), trimethylolpropane trimethacrylate (2.0 grams ) and diglycerin fatty acid ester (purchased from McLean, 3.0 g) to obtain a homogeneous oil phase.

[0161] The resulting oil phase is placed in a 2-liter volume stainless steel interlayer insulation dispersing tank, and the oil phase is stirred using a disperser. Add all the water phase within a certain period of time. During the addition of the water phase, the dispersion tank has been kept at 80°C. With the addition of the water phase, the stirring speed gradually increases. Layered high internal phase emulsion.

[0162] B) Preparation of upper HIPE emulsion

[0163] Calcium chloride (100.0 grams) was dissolved in 650 milliliters of deionized water to prepare an aqueous phase, which was mai...

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Abstract

The invention relates to a method for preparing double-layer structure foam with low residual monomer content through rapid curing, a foam material and application thereof. The prepared double-layer structure foam can be used for disposable hygiene products; upper-layer foam holes are large and play a role in rapidly absorbing and guiding fluid to other absorption areas; and lower-layer foam holes are small in size and large in specific surface area and has very high wicking capacity and fluid storage capacity. The prepared hygiene product has very good liquid treatment performance, low reverse osmosis, low odor and good softness, is better in fitness to the body compared with a traditional sanitary product, and is comfortable to use.

Description

technical field [0001] The invention relates to the technical field of foam material preparation, in particular to a preparation method of a high internal phase emulsion foam material that can be solidified in a short time, has a double-layer foam structure and has relatively low residual monomers, the foam material and its application. Background technique [0002] A high internal phase emulsion (HIPE) is an ultra-concentrated emulsion dispersion system with a volume fraction of the dispersed phase exceeding 74%, in which the droplets of the dispersed phase are deformed into polyhedral shapes surrounded by a thin continuous phase When separated, when the dispersed phase is aqueous phase droplets and the continuous phase is a polymerizable monomer, after the polymerization reaction occurs, the monomer polymerizes into cell walls to form a porous structure, such as a foam, and the cells of the porous structure The size is determined by the size distribution of the aqueous pha...

Claims

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Application Information

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IPC IPC(8): C08J9/42C08J9/00C08F220/18C08F212/08C08F222/14C08F212/36C08L33/08
CPCC08J9/42C08J9/00C08F220/1808C08F220/1812C08F220/1818C08J2333/08C08J2471/02C08F212/08C08F222/102C08F212/36C08F222/103
Inventor 尉晓丽刘岩
Owner WANHUA CHEM GRP
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