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Sponge material for preparing yellowing-resistant cotton pad and preparation method thereof

A sponge and yellowing-resistant technology is applied in the preparation of sponge materials for yellowing-resistant cotton and its preparation field, and can solve the problems of accelerated material oxidation process, yellowing resistance, unsatisfactory VOC emission, discoloration of white materials, etc. Achieve the effect of low VOC emission, excellent yellowing resistance and excellent water absorption

Active Publication Date: 2019-03-12
江苏钟山新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Oxidation of the material occurs, heat will accelerate the oxidation process of the material, and free radicals are easily formed after the peroxidized structure is formed, resulting in discoloration of light and white materials
[0007] The cosmetic cotton in the prior art has unsatisfactory anti-yellowing properties and VOC emissions

Method used

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  • Sponge material for preparing yellowing-resistant cotton pad and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Ethylene oxide-propylene oxide-ethylene oxide block polyether polyol: the mass percentage of ethylene oxide in epoxide is 88%, the mass of terminal ethylene oxide in ethylene oxide The percentage content is 30%, the mass percentage content of the primary hydroxyl group in the terminal hydroxyl group is 85%, the number average molecular weight is 1000, the average functionality is 2.5, and the total aldehyde content is 1 μg / g. The preparation method of ethylene oxide-propylene oxide-ethylene oxide block polyether polyol is as follows: add the initiator (a mixture of glycerol and dipropylene glycol) and the catalyst KOH into the reactor, raise the temperature to 120°C, Remove water under the condition of vacuum degree of -0.095MPa until the water content is less than 0.05%, turn off the vacuum, put ethylene oxide, propylene oxide, and ethylene oxide into the reaction kettle in proportion, and the reaction temperature is 110- 120°C, reaction pressure ≤ 0.04MPa, to obtain c...

Embodiment 2

[0033] Polyurethane resin component: Add 100g propylene oxide-ethylene oxide block polyether polyol (purchased from Jiangsu Zhongshan Chemical Co., Ltd., the mass percentage content of ethylene oxide in the epoxide is 80 %, the mass percent content of the primary hydroxyl group in the terminal hydroxyl group is 90%, the number average molecular weight is 2000, the average functionality is 2.8, and the total aldehyde content is 0.3 μ g / g. The initiator used in the preparation is the mixture of glycerol and dipropylene glycol .), heated up to 120°C, dehydrated at 120°C and a vacuum of -0.095MPa for 2 hours, cooled to 45°C, added 33g of hexamethylene diisocyanate, stirred for 30 minutes, and raised to 110°C (heating time is 20min), then react at 110°C for 2 hours, cool down to 50°C to obtain a polyurethane resin component, and store in a nitrogen seal. After testing, the mass percentage of -NCO in the polyurethane resin component was 8%.

[0034] Foaming agent components: Weigh ...

Embodiment 3

[0037]Polyurethane resin component: Add 100g propylene oxide-ethylene oxide block polyether polyol (purchased from Jiangsu Zhongshan Chemical Co., Ltd., the mass percentage of ethylene oxide in the epoxide is 70 %, the mass percent content of the primary hydroxyl group in the terminal hydroxyl group is 85%, the number average molecular weight is 1500, the functionality is 2, and the total aldehyde content is 0.5 μ g / g. The initiator used in the preparation process is dipropylene glycol.), heating up to 120°C, dehydrate for 2 hours at 120°C and a vacuum of -0.095MPa, cool down to 48°C, add 48g of isophorone diisocyanate, stir for 30 minutes, raise the temperature to 95°C (heating time is 10min), at 95°C The reaction was carried out at ℃ for 1 hour, and then the temperature was lowered to 50 ℃ to obtain a polyurethane resin component, which was stored in a nitrogen seal. After testing, the mass percentage of -NCO in the polyurethane resin component was 8.5%.

[0038] Foaming ag...

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Abstract

The invention provides a sponge material for preparing a yellowing-resistant cotton pad and a preparation method thereof, and belongs to the technical field of polymer synthesis. The sponge material is prepared by adopting a following method which comprises the following steps of preparation of a polyurethane resin component: enabling polyether polyol and isocyanate to react to obtain the polyurethane resin component, wherein the mass percentage content of an isocyanate radical is 7.5% to 8.5%, and the sum of the contents of formaldehyde, acetaldehyde and acrylaldehyde in the polyether polyoldoes not exceed 1 mug / g; preparation of a foaming agent component: uniformly mixing water, an emulsifying agent and a pore-forming agent, so that the foaming agent component is obtained; and foaming:uniformly mixing 100 parts by mass of the polyurethane resin component and 100 to 200 parts by mass of the foaming agent component, pouring into a mold, curing and oven-drying, so that the sponge material is obtained. The sponge material provided by the invention not only has excellent hydrophilicity and hand feeling comfortableness, but also has no unfavorable influence on a skin of a human body,moreover, has lower VOC (Volatile Organic Compound) emission, and is excellent in yellowing-resistant property and environmentally friendly in preparation method.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and in particular relates to a sponge material for preparing anti-yellowing makeup cotton and a preparation method thereof. Background technique [0002] Cosmetic cotton is one of the cosmetic products that people often use in modern society. It is small and beautiful, and is especially favored by modern women. There are many kinds of cotton pads currently on the market, which can be roughly divided into two types: latex and non-latex. The following foam materials are commonly used cosmetic cotton raw materials. [0003] Wet-process polyurethane is to dissolve polyurethane in dimethylformamide, add a pore-forming agent and mix well, and the resulting mixture is filled and gelled in a designated mold, and then eluted with a large amount of water to form a wet-process polyurethane foam. Although wet-process polyurethane foam has a smooth texture and a good touch, dimethylformamide has a large bur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08J9/08C08G101/00
CPCC08G18/485C08J2375/08C08G2110/0083
Inventor 宗红亮张丽君李月文刘潇申宝兵高宏飞
Owner 江苏钟山新材料有限公司
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