CN115141352A - Electrotherapy shoulder rest and application thereof - Google Patents

Electrotherapy shoulder rest and application thereof Download PDF

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Publication number
CN115141352A
CN115141352A CN202110886554.6A CN202110886554A CN115141352A CN 115141352 A CN115141352 A CN 115141352A CN 202110886554 A CN202110886554 A CN 202110886554A CN 115141352 A CN115141352 A CN 115141352A
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electrotherapy
shoulder rest
parts
polyol
shoulder
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CN115141352B (en
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陈文�
林刚
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Zhongkang Home Medical Technology Wuhan Co ltd
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Zhongkang Home Medical Technology Wuhan Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4825—Polyethers containing two hydroxy groups
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N1/00—Electrotherapy; Circuits therefor
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    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
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    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4804—Two or more polyethers of different physical or chemical nature
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    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
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    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4829—Polyethers containing at least three hydroxy groups
    • C—CHEMISTRY; METALLURGY
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    • C08G18/40—High-molecular-weight compounds
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    • C08G18/6666—Compounds of group C08G18/48 or C08G18/52
    • C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6674—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
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    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
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    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract

The invention relates to A61F5/042, in particular to an electrotherapy shoulder rest and application thereof. Including shoulder rest body and electrotherapy massager, the shoulder rest body is the memory sponge, memory sponge raw materials include: 90-120 parts of polyhydroxy compound, 45-80 parts of aromatic isocyanate, 0.2-0.5 part of catalyst, 2-5 parts of chitosan, 2.5-4 parts of surfactant, 2-5 parts of small molecular alcohol, 0.5-2 parts of cross-linking agent and 3-7 parts of water. The electrotherapy shoulder rest provided by the invention has excellent mechanical property, good slow rebound resilience and low temperature sensitivity.

Description

Electrotherapy shoulder rest and application thereof
Technical Field
The invention relates to A61F5/042, in particular to an electrotherapy shoulder rest and application thereof.
Background
Rehabilitation therapy is always an important component of modern medicine, and with the continuous influence of foreign rehabilitation therapy development experience, the continuous improvement and opening of domestic policies, and the development of new modes and new technologies of rehabilitation therapy are endless. The market value and market space of the rehabilitation industry is also growing. In order to better return to the society and return to work, medical rehabilitation gradually enters the sight of people besides the drug therapy. At present, the development of rehabilitation medical treatment in China is limited, medical rehabilitation equipment is in short supply, and the research on the medical rehabilitation equipment is less.
Especially, in recent years, the society is seriously curled up, the living pressure of people is increased, the cervical spondylosis, the scapulohumeral periarthritis and other 'middle-aged and old-aged diseases' are low in age and the incidence rate is continuously increased due to long-time work at desk, driving, some bad living habits in life and the like.
Disclosure of Invention
In order to solve the above technical problems, a first aspect of the present invention provides an electrotherapy shoulder rest, including a shoulder rest body and an electrotherapy massager, wherein the shoulder rest body is a memory sponge, and the memory sponge comprises: 90-120 parts of polyhydroxy compound, 45-80 parts of aromatic isocyanate, 0.2-0.5 part of catalyst, 2-5 parts of chitosan, 2.5-4 parts of surfactant, 2-5 parts of micromolecular alcohol, 0.5-2 parts of cross-linking agent and 3-7 parts of water.
Polyhydroxy compounds
Preferably, the polyol comprises a first polyol, a second polyol, and a third polyol. The mass ratio of the first polyhydroxy compound to the second polyhydroxy compound to the third polyhydroxy compound is (7-10): (1-3): (1-3).
Preferably, the polyol has a functionality of 2 to 4.
Preferably, the polyether polyol and/or the polyester polyol of the polyol.
A first polyol
Preferably, the first polyol has an average molecular weight of 2500 to 3500 and a hydroxyl number of 50 to 65.
Further preferably, the viscosity of the first polyhydroxy compound at 25 ℃ is from 600 to 750 mPas.
Still further preferably, the first polyol is a polyether polyol having a functionality of 2.
A second polyol
Preferably, the second polyol has an average molecular weight of 400 to 500 and a hydroxyl number of 350 to 430.
In general, the average molecular weight of the polyhydroxy compound contained in the memory sponge is between 1000 and 3500, and the invention has been unexpectedly found that when the second polyhydroxy compound with the average molecular weight of 400 to 500 is compounded with other substances in a system, the crosslinking density of the system can be obviously improved, and the rebound time can be prolonged. Meanwhile, the electrotherapy shoulder pad is promoted to keep excellent service performance in a wider temperature range (0-40 ℃).
Further preferably, the viscosity of the second polyol at 25 ℃ is from 300 to 400 mPas.
Still further preferably, the second polyol is a polyether polyol having a functionality of 3.
A third polyol
Preferably, the third polyol has an average molecular weight of from 1500 to 2500 and a hydroxyl number of from 50 to 60.
Further preferably, the third polyol is a polyester polyol having a functionality of 2.
The invention discovers, by unexpected research, that the addition of the chitosan promotes the prepared electrotherapy shoulder pad to have better antibacterial performance and can reduce the pore size of foam. However, chitosan causes a decrease in tensile strength and elongation at break. Through the mutual matching of the polyhydroxy compounds, the crosslinking density is high, the elastic modulus is good, the apparent density is effectively improved, and pores are communicated with each other to form a stable three-dimensional network structure.
Aromatic isocyanates
Preferably, the aromatic isocyanate includes at least one of toluene diisocyanate, diphenyldimethylene diisocyanate, 1, 5-naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate.
Preferably, the aromatic isocyanate has an isocyanate content of 30 to 35% and a viscosity of 10 to 15 mPas at 25 ℃.
Preferably, the diphenyldimethane diisocyanate includes 4,4-MDI and 2,4-MDI.
Catalyst and process for preparing same
Preferably, the catalyst comprises at least one of triethylene diamine, tetramethyl butanediamine, triethylene diamine, dibutyltin dilaurate and stannous octoate.
In order to further improve the indentation hardness and the mechanical property, it is further preferable that the catalyst comprises triethylene diamine and stannous octoate. The mass ratio of the triethylene diamine to the stannous octoate is (2-4): (1-2). When the dosage of triethylene diamine is too large, the foaming reaction is too violent, the foam wall strength of formed foam holes is not enough, and the electrotherapy shoulder support is easy to collapse in the using process.
Chitosan
In order to further improve the antibacterial performance and resilience of the electrotherapy shoulder pad, the chitosan preferably has an average particle size of 50-100 meshes and a deacetylation degree of more than or equal to 85%. The chitosan has a certain antibacterial property, can obviously improve the antibacterial ability of the electrotherapy shoulder pad when being applied to the system, and simultaneously forms a hydrogen bond effect with a polymer of the system, thereby improving the pore diameter and the apparent density of the cells.
Surface active agent
Preferably, the surfactant comprises a first surfactant and a second surfactant. The weight ratio of the first surfactant to the second surfactant is (5-8): (3-5).
Preferably, the first surfactant has a viscosity in the range of 80-120cst at 25 ℃.
Preferably, the second surfactant has a viscosity of 650 to 800mPa · s at 40 ℃.
The research of the invention finds that under the condition, the surface tension in the foaming process can be obviously reduced, the foam density is improved, the foaming is uniform, the cell breakage can be promoted, the open-cell structure is obtained, and the foam shrinkage is prevented.
Small molecule alcohol
Preferably, the small molecule alcohol comprises at least one of ethylene glycol, butanediol, diethylene glycol and hexanediol.
Crosslinking agent
Preferably, the crosslinking agent is dimethylthiotoluenediamine.
A preparation method of a memory sponge comprises the following steps: weighing the raw materials according to a formula, sequentially adding a polyhydroxy compound, a catalyst, a surfactant, water, micromolecule alcohol, chitosan and a cross-linking agent, stirring continuously during the adding process, adding aromatic isocyanate after all the raw materials are stirred uniformly, continuously stirring for 40-70s, pouring a film into the mixture, foaming, curing, demolding and drying to obtain the memory sponge.
A preparation method of a memory sponge comprises the following steps: vacuum dehydrating the polyhydroxy compound at 100 ℃, cooling, adding aromatic isocyanate, heating a catalyst to 80 ℃, reacting for 2 hours, stopping the reaction, then quickly adding chitosan, a surfactant, small molecular alcohol, a cross-linking agent and water, stirring uniformly, pouring into a mold, curing for 12 hours, and standing at room temperature for 6 hours to obtain the memory sponge.
A preparation method of an electrotherapy shoulder rest comprises the following steps: placing the electric therapeutic massager into the shoulder rest body.
The second aspect of the invention provides an application of the electrotherapy shoulder rest in the technical field of medical rehabilitation.
Has the advantages that:
1) The electrotherapy shoulder rest provided by the invention has the advantages of good antibacterial property, excellent mechanical property and good slow rebound resilience.
2) The electrotherapy shoulder rest provided by the invention has low application temperature sensitivity, can keep better service performance within 0-40 ℃, and has wide application range.
3) The electrotherapy shoulder rest and the application thereof provided by the invention have the advantages of good thermal stability, good fatigue resistance, good durability, simple preparation, low price and suitability for large-scale production.
Detailed Description
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
Example 1
An electrotherapy shoulder rest comprises a shoulder rest body and an electrotherapy massager, wherein the shoulder rest body is a memory sponge, and the memory sponge comprises the following raw materials: the adhesive comprises, by weight, 105 parts of a polyhydroxy compound, 65 parts of aromatic isocyanate, 0.45 part of a catalyst, 3 parts of chitosan, 3 parts of a surfactant, 3 parts of small molecular alcohol, 1 part of a crosslinking agent and 5 parts of water.
The polyol includes a first polyol, a second polyol, and a third polyol. The mass ratio of the first polyhydroxy compound to the second polyhydroxy compound to the third polyhydroxy compound is 9:2:2.
the first polyol is a polyether polyol having a functionality of 2, an average molecular weight of 3000, a hydroxyl number of 37, a viscosity of water at 25 ℃ of 674 mPa-s, trade mark: VORANOL 3000LM. The second polyol is a polyether polyol having a functionality of 3, an average molecular weight of 450, a hydroxyl number of 383, a viscosity of water at 25 ℃ of 330 mPa-s, and a brand number: VORANOL CP450. The first polyol and the second polyol are both purchased from kelvin chemical industry. The third polyol is polyester polyol, the functionality is 2, the average molecular weight is 2000, the hydroxyl value is 54-58, and the brand number: p-2420TL. Purchased from Nisshin chemical industries, inc.
The aromatic isocyanate is diphenyldimethylene diisocyanate. The diphenylmethane diisocyanate included 4,4-MDI and 2,4-MDI, the isocyanate content was 33.5%, the viscosity at 25 ℃ was 12mPa · s, trade name: lupranate MI available from Kay chemical industry.
The catalyst comprises triethylene diamine and stannous octoate. The mass ratio of the triethylene diamine to the stannous octoate is 3.5:1.5.
the chitosan has an average particle size of 80 meshes and a deacetylation degree of 90 percent, and is purchased from Shandong Onkang Biotechnology Co., ltd.
The surfactants include a first surfactant and a second surfactant. The weight ratio of the first surfactant to the second surfactant is 7:4. the first surfactant has a viscosity of 100cst at 25 ℃. The first surfactant is an organic silicon surfactant, and the mark is as follows: l-580 available from Kay chemical industry. The second surfactant has a viscosity of 650 to 800 mPas at 40 ℃. The second surfactant is polyether polyol surfactant, and the mark is as follows: YUKOL 1900. Purchased from bright-day industries, inc.
The small molecular alcohol is ethylene glycol.
The cross-linking agent is dimethyl-sulfur-based toluenediamine, and the mark is as follows: ethacure300, available from Yari chemical Co., ltd, zhang hong Kong.
A preparation method of a memory sponge comprises the following steps: vacuum dehydrating the polyhydroxy compound at 100 ℃, cooling, adding aromatic isocyanate, heating a catalyst to 80 ℃, reacting for 2 hours, stopping the reaction, then quickly adding chitosan, a surfactant, small molecular alcohol, a cross-linking agent and water, stirring uniformly, pouring into a mold, curing for 12 hours, and standing at room temperature for 6 hours to obtain the memory sponge.
A preparation method of an electrotherapy shoulder rest comprises the following steps: placing the electric therapeutic massager into the shoulder rest body.
Example 2
The difference between the specific implementation mode of the electrotherapy shoulder pad and the embodiment 1 is that the mass ratio of the triethylene diamine to the stannous octoate is 2:1.
example 3
The difference between the specific implementation mode of the electrotherapy shoulder rest and the embodiment 1 is that the memory sponge comprises the following raw materials: the catalyst comprises, by weight, 90 parts of polyhydroxy compound, 45 parts of aromatic isocyanate, 0.2 part of catalyst, 2 parts of chitosan, 2.5 parts of surfactant, 2 parts of small molecular alcohol, 0.5 part of cross-linking agent and 3 parts of water.
Example 4
An electrotherapy shoulder pad embodiment differs from example 1 in that the weight ratio of the first surfactant to the second surfactant is 7:1.
comparative example 1
An electrotherapeutic shoulder pad is different from example 1 in that the mass ratio of the first polyol, the second polyol, and the third polyol is 5:2:2.
comparative example 2
An electrotherapeutic shoulder pad embodiment is the same as example 1 except that the second polyol is a polyether polyol having a functionality of 3, an average molecular weight of 1000, a hydroxyl number of 156, a viscosity of water at 25 ℃ of 220 mPa-s, trade mark: VORANOL SD301, available from Kahn Chemicals.
Performance testing
1. And (3) testing mechanical properties: tensile strength and elongation at break were tested according to GB/T6344.
2. And (3) testing the rebound rate time: the sample of 100mm x 100mm is adopted, the memory sponge is compressed to 95% of the original thickness by an electronic universal testing machine, the force value is reset, and the initial point is set. The compression was carried out at a speed of 500mm/min to 50% of the original thickness, and then the ram was rapidly returned to the starting point (1000 mm/min), and the rebound time was calculated from the measured load time curve.
Table 1 results of performance testing
Figure BDA0003194420050000061
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims (10)

1. An electrotherapy shoulder rest is characterized by comprising a shoulder rest body and an electrotherapy massager, wherein the shoulder rest body is a memory sponge, and the memory sponge comprises the following raw materials: 90-120 parts of polyhydroxy compound, 45-80 parts of aromatic isocyanate, 0.2-0.5 part of catalyst, 2-5 parts of chitosan, 2.5-4 parts of surfactant, 2-5 parts of micromolecular alcohol, 0.5-2 parts of cross-linking agent and 3-7 parts of water.
2. The electrotherapy shoulder rest of claim 1, wherein said polyol comprises a first polyol, a second polyol, and a third polyol.
3. An electrotherapy shoulder rest according to claim 2, wherein said first polyol has an average molecular weight of from 2500 to 3500 and a hydroxyl number of from 50 to 65.
4. An electrotherapy shoulder rest according to claim 2, wherein said second polyol has an average molecular weight of 400-500 and a hydroxyl number of 350-430.
5. An electrotherapy shoulder rest according to claim 2, wherein said third polyol has an average molecular weight of from 1500 to 2500 and a hydroxyl number of from 50 to 60.
6. An electrotherapy shoulder rest according to any one of claims 1-5, wherein said aromatic isocyanate comprises at least one of toluene diisocyanate, diphenyldimethane diisocyanate, 1, 5-naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate.
7. The electrotherapy shoulder rest according to claim 6, wherein the aromatic isocyanate has an isocyanate content of 30-35% and a viscosity at 25 ℃ of 10-15mPa s.
8. An electrotherapy shoulder pad according to any one of claims 1-7, wherein said catalyst comprises at least one of triethylene diamine, tetramethyl butanediamine, triethylene diamine, dibutyl tin dilaurate, and stannous octoate.
9. An electrotherapy shoulder rest according to any one of claims 1-7, wherein said small molecule alcohol comprises at least one of ethylene glycol, butylene glycol, diethylene glycol, and hexylene glycol.
10. Use of an electrotherapeutic shoulder rest according to any one of claims 1-9 in the medical rehabilitation field.
CN202110886554.6A 2021-08-03 2021-08-03 Electrotherapy shoulder rest and application thereof Active CN115141352B (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3470446A1 (en) * 2017-10-16 2019-04-17 Covestro Deutschland AG Rigid polyurethane foam system and application thereof
CN110527059A (en) * 2019-07-31 2019-12-03 成都世友海绵制品有限公司 A kind of low temperature perception memory foam and preparation method based on air and structural support
CN111454429A (en) * 2020-06-10 2020-07-28 泉州玺堡家居科技有限公司 MDI (diphenylmethane diisocyanate) tapping technology-based high-breathability slow-resilience cotton and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3470446A1 (en) * 2017-10-16 2019-04-17 Covestro Deutschland AG Rigid polyurethane foam system and application thereof
CN110527059A (en) * 2019-07-31 2019-12-03 成都世友海绵制品有限公司 A kind of low temperature perception memory foam and preparation method based on air and structural support
CN111454429A (en) * 2020-06-10 2020-07-28 泉州玺堡家居科技有限公司 MDI (diphenylmethane diisocyanate) tapping technology-based high-breathability slow-resilience cotton and preparation method thereof

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