Composition for adhesive hydrogel and use thereof

An adhesive hydrogel, composition technology, applied in the direction of adhesive type, acid copolymer adhesive, film/sheet adhesive, etc. Product life, resource saving, high adhesive effect

Active Publication Date: 2013-09-04
SEKISUI PLASTICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, since the hydrogel described in Patent Document 2 requires an action such as washing with water, the user finds it troublesome to have to follow the requirements described in the operation manual on how to wash and how to dry the hydrogel in order to ensure the restoration of adhesive strength
[0009] In addition, the purpose of preventing redness of the skin, that is, the purpose of alleviating irritation to the skin has not yet been achieved

Method used

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  • Composition for adhesive hydrogel and use thereof
  • Composition for adhesive hydrogel and use thereof
  • Composition for adhesive hydrogel and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Stir and dissolve 14.4 parts by weight of acrylic acid, 9.6 parts by weight of tert-butylacrylamide sulfonic acid (TBAS) and 3 parts by weight of N-vinyl-2-caprolactam as polymerizable monomers; 0.04 parts by weight of N,N'-methylenebisacrylamide (MBAA); 44 parts by weight of glycerin as a polyol; 3 parts by weight of polyvinylpyrrolidone (CREEJUS K30, Dai-ichi Kogyo Seiyaku Co., Ltd. .preparation, K-value: 29.2); 0.5 parts by weight of sodium chloride as electrolyte; and 0.2 parts by weight of 1-[4-(2-hydroxyethoxy)-phenyl] as ultraviolet photopolymerization initiator -2-Hydroxy-2-methyl-propan-1-one (product name: Irgacure 2959, manufactured by Ciba Specialty Chemicals K.K.), to obtain a monomer mixed solution.

[0092] Thereafter, the mixed solution was adjusted to have a pH of 4.0 to 5.0 with 8 parts by weight of a 50% by weight aqueous NaOH solution, and ion-exchanged water was added thereto until the water amount was 17.3 parts by weight. Then, use a metal halide...

Embodiment 2 to 16 and comparative example 1 to 9

[0094] Adhesive hydrogels were prepared in the same manner as in Example 1 except that the composition was changed according to the compositions shown in Tables 1 to 3 . Forming was not possible in Comparative Example 6 and Comparative Example 9.

[0095] In Tables 1 to 3, DMAA refers to N,N-dimethylacrylamide, and 1,9ND refers to 1,9-nonanediol dimethacrylate.

[0096] (method used to measure bond strength)

[0097] Each of the prepared adhesive hydrogels was cut into strips of 20 mm×100 mm and lined with a non-woven fabric ("spunlace non-woven fabric #8021", manufactured by Du Pont Kabushiki Kaisha, thickness: 0.38 mm) to obtain A test piece was attached to a phenolic resin board (phenolic resin sheet, product number: PL113, manufactured by Sumitomo Bakelite Co., Ltd.) and set in a Tensilon (manufactured by Orientec Co., Ltd.). Then, the test piece was separated at an angle of 90° at a speed of 300 mm / min according to JIS-Z0237 and the strength required thereby was measured ...

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Abstract

The purpose of the present invention is to provide a composition for an adhesive hydrogel that shows adhesiveness appropriate for repeated use without requiring a special procedure such as rinsing with water and that has particularly weak skin irritability, and also to provide a use thereof (for instance, an adhesive hydrogel, gel sheet, or electrode). The present invention is a composition for an adhesive hydrogel formed from at least a polymer matrix forming material, water, and a polyvalent alcohol. The polymer matrix forming material is formed from at least: (a) a (meth)acrylic acid, a (meth)acrylic acid derivative, or a C4-5 vinyl derivative having two carboxyl groups; (b) a (meth)acrylamide or (meth)acrylamide derivative; (c) N-vinyl-2-caprolactam and / or N-vinyl-2-valerolactam; and (d) a crosslinkable monomer, wherein the content of (b) in the adhesive hydrogel composition is 2 to 20 wt%.

Description

technical field [0001] The present invention relates to compositions for adhesive hydrogels, which exhibit adhesive properties suitable for repeated use and are particularly less irritating to the skin, and to uses thereof (e.g., adhesive hydrogels, gel sheets and electrodes). Background technique [0002] Basically, hydrogels are highly hydrophilic polymers that swell in aqueous media. Hydrogels have various properties such as water absorption, swelling tendency, adhesiveness and electrical conductivity. Due to the advantages of these properties, hydrogels have been used in a wide range of fields, including civil engineering and construction, agriculture, food, medical care products, cosmetics and electrical fields. [0003] For example, in medical practice, adhesive hydrogels are used as electrode pads for measuring devices such as electrocardiograms. In recent years, adhesive hydrogels have been used as electrode pads for EMS (electrical muscle stimulation) for weight ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J133/02A61K8/02A61K9/06C09J7/00C09J11/04C09J11/06C09J139/06
CPCA61K9/0014A61K9/06A61K47/10A61K47/32C09J133/02C09J133/26C09J139/04A61K8/02C09J11/04C09J9/00
Inventor 佐藤香织羽鸟贵显藤原康博
Owner SEKISUI PLASTICS CO LTD
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