CN115141352B - Electrotherapy shoulder rest and application thereof - Google Patents
Electrotherapy shoulder rest and application thereof Download PDFInfo
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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
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- 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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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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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
- 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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
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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
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
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- 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
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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
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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- 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
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
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- 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
- C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
- C08G18/6484—Polysaccharides and derivatives thereof
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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
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- 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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- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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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. The device comprises a shoulder rest body and an electrotherapy massager, wherein the shoulder rest body is made of 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 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 properties, good slow rebound resilience and low temperature sensitivity.
Description
Technical Field
The invention relates to A61F5/042, in particular to an electrotherapy shoulder rest and application thereof.
Background
Rehabilitation therapy is an important component of modern medicine all the time, and with the continuous influence of foreign rehabilitation therapy development experience, domestic policies are continuously perfected and opened, and new modes and new technologies of rehabilitation therapy are endless. Market value and market space for the rehabilitation medical industry are also increasing. In order to better return to society and return to work, medical rehabilitation gradually enters the sight of people outside the medical treatment. At present, the development of rehabilitation medical treatment in China is limited, medical rehabilitation equipment is in shortage, and the research on the medical rehabilitation equipment is less.
Especially, in recent years, the social coils are serious, the life pressure of people is increased, people work on a table for a long time, cervical spondylosis, scapulohumeral periarthritis and other middle-aged and elderly diseases are reduced due to bad life habits in driving and life, and the incidence rate is continuously increased.
Disclosure of Invention
In order to solve the above technical problem, a first aspect of the present invention provides an electrotherapy shoulder rest, including a shoulder rest body and an electrotherapy massager, the shoulder rest body is a memory sponge, and the 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.
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 from 2 to 4.
Preferably, the polyether polyol and/or polyester polyol of the polyol.
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 polyol at 25℃is 600 to 750 mPas.
Still more preferably, the first polyol is a polyether polyol having a functionality of 2.
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 polyhydroxy compounds contained in the memory sponge is between 1000 and 3500, and the unexpected research of the invention finds that when the second polyhydroxy compound with the average molecular weight of 400 to 500 is compounded with other substances in the system, the crosslinking density of the system can be obviously improved, and the rebound time can be prolonged. While promoting the electrotherapy shoulder rest to maintain excellent use performance over a wider temperature range (0-40 ℃).
Further preferably, the viscosity of the second polyol is 300 to 400 mPas at 25 ℃.
Still more preferably, the second polyol is a polyether polyol having a functionality of 3.
Third polyol
Preferably, the third polyol has an average molecular weight of 1500 to 2500 and a hydroxyl number of 50 to 60.
Further preferably, the third polyol is a polyester polyol having a functionality of 2.
According to the invention, the unexpected research shows that the addition of chitosan promotes the prepared electrotherapy shoulder rest to have better antibacterial performance and can reduce the pore diameter of foam. Chitosan, however, results in reduced tensile strength and elongation at break. Through the mutual coordination among polyhydroxy compounds, the cross-linking density is high, the elastic modulus is good, the apparent density is effectively improved, and the pores are mutually communicated to form a stable three-dimensional network structure.
Aromatic isocyanates
Preferably, the aromatic isocyanate includes at least one of toluene diisocyanate, diphenyl diisocyanate, 1, 5-naphthalene diisocyanate, polymethylene polyphenyl polyisocyanate.
Preferably, the aromatic isocyanate has an isocyanate content of 30-35% and a viscosity of 10-15 mPas at 25 ℃.
Preferably, the diphenylmethane diisocyanate comprises 4,4-MDI and 2,4-MDI.
Catalyst
Preferably, the catalyst comprises at least one of triethylenediamine, tetramethylbutanediamine, triethylenediamine, dibutyltin dilaurate, stannous octoate.
In order to further improve the indentation hardness and mechanical properties, it is further preferred that the catalyst comprises triethylenediamine and stannous octoate. The mass ratio of the triethylene diamine to the stannous octoate is (2-4): (1-2). When the amount of the triethylene diamine is too large, the foaming reaction is too severe, the strength of the foam wall of the formed foam holes is insufficient, and the electrotherapy shoulder rest is easy to collapse in the use process.
Chitosan
In order to further improve the antibacterial property and rebound resilience of the electrotherapy shoulder rest, preferably, the average particle size of the chitosan is 50-100 meshes, and the deacetylation degree is more than or equal to 85%. The chitosan has certain antibacterial property, can obviously improve the antibacterial capability of the electrotherapy shoulder rest when being applied to the system, and simultaneously forms a hydrogen bond effect with polymers of the system, thereby improving the pore diameter and apparent density of cells.
Surface active agent
Preferably, the surfactant includes 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 viscosity of the first surfactant is 80-120cst at 25 ℃.
Preferably, the viscosity of the second surfactant is 650-800 mpa.s at 40 ℃.
According to the invention, under the condition, the surface tension in the foaming process can be obviously reduced, the foam density is improved, the foaming is uniform, and the foam cells can be promoted to break so as to obtain an open-cell structure, so that the foam is prevented from shrinking.
Small molecule alcohols
Preferably, the small molecule alcohol comprises at least one of ethylene glycol, butanediol, diethylene glycol and hexanediol.
Crosslinking agent
Preferably, the crosslinking agent is dimethyl thiotoluene diamine.
A method for preparing a memory sponge, comprising the following steps: weighing the raw materials according to the formula, sequentially adding polyhydroxy compound, catalyst, surfactant, water, micromolecular alcohol, chitosan and cross-linking agent, continuously stirring in the adding process, adding aromatic isocyanate after uniformly stirring, continuously stirring for 40-70s, pouring into a film, foaming, curing, demolding and drying to obtain the memory sponge.
A method for preparing a memory sponge, comprising the following steps: vacuum dehydrating the polyhydroxy compound at 100 ℃, cooling, adding aromatic isocyanate, heating the catalyst to 80 ℃, reacting for 2 hours, stopping the reaction, then rapidly adding chitosan, surfactant, small molecular alcohol, cross-linking agent and water, uniformly stirring, pouring into a mould, 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: the electrotherapy massager is put 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.
The beneficial effects are 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 performance within 0-40 ℃, and has wide application range.
3) The electrotherapy shoulder rest provided by the invention has the advantages of good thermal stability, good fatigue resistance, good durability, simple preparation and low cost, and is suitable for mass production.
Detailed Description
The present invention will be specifically described below by way of examples. It is noted herein that the following examples are given solely for the purpose of further illustration and are not to be construed as limitations on the scope of the invention, as will be apparent to those skilled in the art in light of the foregoing disclosure.
In addition, the raw materials used are commercially available unless otherwise indicated.
Examples
Example 1
An electrotherapy shoulder rest comprises a shoulder rest body and an electrotherapy massager, wherein the shoulder rest body is made of memory sponge, and the memory sponge comprises the following raw materials: 105 parts of polyhydroxy compound, 65 parts of aromatic isocyanate, 0.45 part of catalyst, 3 parts of chitosan, 3 parts of surfactant, 3 parts of small molecular alcohol, 1 part of cross-linking 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 polyhydroxy compound is polyether polyol, has a functionality of 2, an average molecular weight of 3000, a hydroxyl value of 37, and a viscosity of water at 25 ℃ of 674mPa.s, and a brand: VORANOL 3000LM. The second polyhydroxy compound is polyether polyol, the functionality is 3, the average molecular weight is 450, the hydroxyl value is 383, the viscosity of water at 25 ℃ is 330 mPa.s, and the brand is: VORANOL CP450. The first polyhydroxy compound and the second polyhydroxy compound are both purchased from Kayin chemical industry. The third polyhydroxy compound is polyester polyol, the functionality is 2, the average molecular weight is 2000, the hydroxyl value is 54-58, and the brand is: p-2420TL. Purchased from daily peptides, inc.
The aromatic isocyanate is diphenyl methane diisocyanate. The diphenyl diisocyanate comprises 4,4-MDI and 2,4-MDI, the isocyanate content is 33.5 percent, the viscosity at 25 ℃ is 12 mPa.s, and the brand is: lupranate MI, available from kefir 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 average particle diameter of the chitosan is 80 meshes, the deacetylation degree is 90%, and the chitosan is purchased from Shandong Okang Biotechnology Co.
The surfactant includes a first surfactant and a second surfactant. The weight ratio of the first surfactant to the second surfactant is 7:4. the viscosity of the first surfactant is 100cst at 25 ℃. The first surfactant is an organosilicon surfactant, and the brand of the first surfactant is: l-580 from Kayinji chemical industry. The viscosity of the second surfactant is 650-800 mPa.s at 40 ℃. The second surfactant is a polyether polyol surfactant, and the brand is as follows: YUKOL 1900. Purchased from bright open Shanghai industries, inc.
The small molecular alcohol is ethylene glycol.
The cross-linking agent is dimethyl thiotoluene diamine with the brand: ehacure 300, available from Zhang Jia Gangya Rui chemical Co.
A method for preparing a memory sponge, comprising the following steps: vacuum dehydrating the polyhydroxy compound at 100 ℃, cooling, adding aromatic isocyanate, heating the catalyst to 80 ℃, reacting for 2 hours, stopping the reaction, then rapidly adding chitosan, surfactant, small molecular alcohol, cross-linking agent and water, uniformly stirring, pouring into a mould, 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: the electrotherapy massager is put into the shoulder rest body.
Example 2
An electrotherapy shoulder rest embodiment differs from example 1 in that the mass ratio of triethylenediamine to stannous octoate is 2:1.
example 3
An electrotherapy shoulder rest embodiment differs from example 1 in that the memory sponge raw material includes: 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 rest 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 electrotherapy shoulder rest embodiment differs from example 1 in that the first polyol, the second polyol, and the third polyol have a mass ratio of 5:2:2.
comparative example 2
An electrotherapy shoulder rest embodiment differs from example 1 in that the second polyol is a polyether polyol, has 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, brand: VORANOL SD301, available from Kayinjia chemical.
Performance testing
1. Mechanical property test: tensile strength and elongation at break were tested according to GB/T6344.
2. And (3) rebound rate time test: and (3) compressing the memory sponge to 95% of the original thickness by using a 100mm sample and using an electronic universal tester, and resetting the force value to be set as a starting point. Compressing to 50% of the original thickness at a speed of 500mm/min, then returning the ram to the starting point (1000 mm/min) rapidly, and calculating the rebound time according to the measured load time curve.
TABLE 1 Performance test results
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to equivalent embodiments without departing from the technical content of the present invention, and any simple modification, equivalent changes and alterations to the above embodiments according to the technical substance of the present invention still fall within the scope of the technical solution of the present invention.
Claims (5)
1. The electrotherapy shoulder rest is characterized by comprising a shoulder rest body and an electrotherapy massager, wherein the shoulder rest body is made of 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 small molecular alcohol, 0.5-2 parts of cross-linking agent and 3-7 parts of water;
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);
the first polyhydroxy compound is polyether polyol, the functionality is 2, the average molecular weight is 3000, the hydroxyl value is 37, and the viscosity of water at 25 ℃ is 674mPa.s;
the second polyhydroxy compound is polyether polyol, the functionality is 3, the average molecular weight is 450, and the hydroxyl value is 383;
the third polyhydroxy compound is polyester polyol, the functionality is 2, the average molecular weight is 2000, and the hydroxyl value is 54-58.
2. An electrotherapy shoulder rest according to claim 1, wherein said aromatic isocyanate comprises at least one of toluene diisocyanate, diphenyl diisocyanate, 1, 5-naphthalene diisocyanate and polymethylene polyphenyl polyisocyanates.
3. An electrotherapy shoulder rest according to claim 2, wherein the aromatic isocyanate has an isocyanate content of 30-35% and a viscosity of 10-15mpa.s at 25 ℃.
4. An electrotherapy shoulder rest according to claim 1, wherein said catalyst comprises at least one of triethylenediamine, tetramethylbutanediamine, triethylenediamine, dibutyltin dilaurate, stannous octoate.
5. An electrotherapy shoulder rest according to claim 1, wherein said small molecule alcohol comprises at least one of ethylene glycol, butylene glycol, diethylene glycol, hexylene glycol.
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| CN202110886554.6A CN115141352B (en) | 2021-08-03 | 2021-08-03 | Electrotherapy shoulder rest and application thereof |
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| CN202110886554.6A CN115141352B (en) | 2021-08-03 | 2021-08-03 | Electrotherapy shoulder rest and application thereof |
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| CN115141352B true CN115141352B (en) | 2023-08-29 |
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Citations (3)
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| 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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Patent Citations (3)
| 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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