CN110964163A - High-strength breathable polyurethane material for medical fixing splint and preparation method and application thereof - Google Patents
High-strength breathable polyurethane material for medical fixing splint and preparation method 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
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4816—Two or more polyethers of different physical or chemical nature mixtures of two or more polyetherpolyols having at least three hydroxy groups
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F5/00—Orthopaedic methods or devices for non-surgical treatment of bones or joints; Nursing devices; Anti-rape devices
- A61F5/01—Orthopaedic devices, e.g. splints, casts or braces
- A61F5/04—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints
- A61F5/05—Devices for stretching or reducing fractured limbs; Devices for distractions; Splints for immobilising
- A61F5/058—Splints
- A61F5/05841—Splints for the limbs
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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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
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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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/1816—Catalysts containing secondary or tertiary amines or salts thereof having carbocyclic groups
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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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/1875—Catalysts containing secondary or tertiary amines or salts thereof containing ammonium salts or mixtures of secondary of tertiary amines and acids
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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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
- C08G18/20—Heterocyclic amines; Salts thereof
- C08G18/2045—Heterocyclic amines; Salts thereof containing condensed heterocyclic rings
- C08G18/2063—Heterocyclic amines; Salts thereof containing condensed heterocyclic rings having two nitrogen atoms in the condensed ring system
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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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- 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
- C08G18/4829—Polyethers containing at least three hydroxy groups
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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
- C08G18/70—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
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
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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
- C08G2101/00—Manufacture of cellular products
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/16—Unsaturated hydrocarbons
- C08J2203/162—Halogenated unsaturated hydrocarbons, e.g. H2C=CF2
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/08—Polyurethanes from polyethers
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Biomedical Technology (AREA)
- Nursing (AREA)
- Vascular Medicine (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
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- Materials Engineering (AREA)
- Polyurethanes Or Polyureas (AREA)
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Abstract
The invention belongs to the technical field of polyurethane, and particularly relates to a high-strength breathable polyurethane material for a medical fixing splint, and a preparation method and application thereof. The component A of the polyurethane material for the high-strength breathable medical fixing splint consists of polyether polyol I, polyether polyol II, polyester polyol III, polyester polyol IV, water, foam stabilizer I, foam stabilizer II, catalyst I, catalyst II, catalyst III, catalyst IV and a foaming agent; the component B is a mixture of polymeric diphenylmethane diisocyanate and propylene carbonate; the mixing mass ratio of the component A to the component B is 1: 1.0-1.4. Aiming at the defects of the prior art, the invention aims to provide the polyurethane material of the high-strength breathable medical splint, which has the advantages of quick forming, high fitting degree with limbs, light weight, high strength and good breathability, and is convenient to wear for a long time; the invention also provides a preparation method and application thereof.
Description
Technical Field
The invention belongs to the technical field of polyurethane, and particularly relates to a high-strength breathable polyurethane material for a medical fixing splint, and a preparation method and application thereof.
Background
The polyurethane foam plastic is a foam product prepared by taking polyether polyol, polyester polyol and isocyanate as main bodies and under the action of auxiliary agents such as foaming agents, catalysts and the like, has good heat insulation performance, mechanical property and chemical resistance, particularly excellent heat insulation performance, and is widely applied to the heat insulation and heat preservation fields of refrigerators, freezers, water heaters, cold storage plates, sandwich plates, pipeline heat preservation, refrigerated containers and the like. Meanwhile, the polyurethane foam molding machine is used for producing products with filling and supporting functions by utilizing the characteristics of quick polyurethane foam molding and high strength.
The medical fixing splint belongs to a medical auxiliary article, is applied to the fixation of clinical bone surgery, and plays a role in local fixation when the limbs of a patient are injured by fracture and the like. In general, the plaster is adopted for fixing limbs of a patient with fracture, and the plaster is heavy and inconvenient to mount, dismount and use. There is also a medical splint of a polymer composite material, which is light in weight but poor in air permeability compared with the conventional plaster and produces an unpleasant smell when worn for a long time. Although the ventilation property is improved by punching holes in the splint, the strength of the splint is affected by the holes in the splint.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide the polyurethane material of the high-strength breathable medical splint, which has the advantages of quick forming, high fitting degree with limbs, light weight, high strength and good breathability, and is convenient to wear for a long time; the invention also provides a preparation method and application thereof.
The polyurethane material for the high-strength breathable medical fixing splint consists of a component A and a component B, wherein the component A consists of the following raw materials in parts by mass:
wherein the total mass portion of the polyether polyol I, the polyether polyol II, the polyether polyol III and the polyether polyol IV is 100 portions;
the component B is a mixture of polymeric diphenylmethane diisocyanate and propylene carbonate according to the mass ratio of 100: 8-15;
the mixing mass ratio of the component A to the component B is 1: 1.0-1.4.
The polyether polyol I is prepared by ring-opening polymerization of sucrose and diethylene glycol serving as initiators and propylene oxide, the functionality is 4.8-5.2, and the hydroxyl value is 370-390 mgKOH/g; preferably the polyether polyol INOVOL R5118G from shandong-norway new materials ltd. The polyether polyol is independently produced, has good intersolubility with the component A system, can ensure that the component A does not have layering or become turbid within 12 months, and compared with other similar polyether polyols, the foam compression strength can be improved by 5 percent, and the low-temperature dimensional stability is reduced by 2 percent.
The polyether polyol II is prepared by ring-opening polymerization of sorbitol and water as initiators and propylene oxide, and has a functionality of 5.5-5.8 and a hydroxyl value of 450-470 mgKOH/g; preferred is polyether polyol INOVOL R6207 produced by shandong-norway new materials limited. The polyether polyol can increase the fluidity of the combined material in the foaming process and improve the compression strength of a foam product.
The polyether polyol III is prepared by taking propylene glycol as an initiator and carrying out ring-opening polymerization with propylene oxide, and has the functionality of 2 and the hydroxyl value of 260-280 mgKOH/g; preferred is polyether polyol INOVOL S227 produced by shandong-norway new materials ltd. The polyether polyol is special polyether polyol produced by Shandong-Nowei new material limited company, and is characterized by fast curing, high compressive strength and good low-temperature dimensional stability; compared with similar products, the curing time of the foam is shortened by 10%, the compressive strength can be improved by 3-5%, and the low-temperature dimensional stability is reduced by 4%.
The polyether polyol IV is prepared by taking propylene glycol as an initiator and carrying out ring-opening polymerization with propylene oxide, wherein the functionality is 3, and the hydroxyl value is 33-35 mgKOH/g; preferably the polyether polyol Inovol S5000T from Shandong-Nowegian New materials, Inc. The polyether polyol is special polyether polyol produced by Shandong-Nowei new material company Limited, so that the foam has a certain open cell effect, the open cell rate is 30-40%, and the air permeability is increased under the condition of ensuring the strength.
The foam stabilizer is M-88308, and the manufacturer is Nanjing Maillard New Material Co.
Wherein, the foam stabilizer M88308 ensures that the foam cells generated are more uniform;
catalyst I is PT303, and the manufacturer is American air chemical products company.
Catalyst II is a 33% alcoholic solution of triethylenediamine, commonly referred to as A-33.
The catalyst III is dimethylbenzylamine.
The catalyst IV is methylammonium salt, commonly known as TMR-2.
The foaming agent is HFO-1233zd, abbreviated as LBA.
LBA is used as a foaming agent, and on the premise of environmental protection performance of zero DOP and low GWP, the characteristic of low boiling point and quick initiation is utilized, and the LBA is matched with a catalyst, so that the reaction speed is increased, the hardening heat is quickly transferred, the internal reaction temperature is reduced, and the solidification and forming are quick.
The invention is a polyurethane combined material system specially designed for the characteristics of a medical fixing splint, which is environment-friendly, tasteless and good in size stability, and most importantly, needs to give consideration to high strength and air permeability and shorten the curing time; the existing polyurethane composite material system can not meet the requirements and can not be used for medical fixing splints.
The invention adopts 4 polyether polyols which are independently produced for compounding, wherein the polyether polyol INOVOL R5118G has good intersolubility with the component A system, and can ensure that the component A does not have layering or become turbid within 12 months, compared with other similar polyether polyols, the foam compression strength can be improved by 5 percent, and the low-temperature dimensional stability is reduced by 2 percent; the polyether polyol INOVOLR6207 can increase the fluidity of the composite material in the foaming process and improve the compressive strength of a foam product; the special polyether polyol INOVOL S227 has the characteristics of quick curing, high compressive strength and good low-temperature dimensional stability, so that the foam curing time is shortened by 10%, the compressive strength can be improved by 3-5%, and the low-temperature dimensional stability is reduced by 4%; the special polyether polyol Inovol S5000T enables the foam to have a certain opening effect, the opening rate is 30-40%, and the air permeability is increased under the condition of ensuring the strength.
In addition, 4 catalysts of PT303, A-33, dimethylbenzylamine and TMR-2 are compounded and combined with the LBA foaming agent, so that the reaction speed can be increased, the hardening heat can be quickly transferred, the internal reaction temperature can be reduced, and the curing and forming are quick.
The preparation method of the polyurethane material for the high-strength breathable medical fixing splint comprises the following steps:
(1) the component A comprises: stirring and mixing polyether polyol I, polyether polyol II, polyether polyol III, polyether polyol IV, a foam stabilizer, water, a catalyst I, a catalyst II, a catalyst III and a catalyst IV uniformly to prepare a dry white material, and mixing the dry white material with a foaming agent to obtain a component A;
(2) and B component: mixing polymeric diphenylmethane diisocyanate and propylene carbonate to obtain a component B;
(3) and uniformly mixing the component A and the component B, pouring the mixture into a mold, and curing and molding to obtain the high-strength breathable polyurethane material for the medical fixing splint.
The curing and forming time in the step (3) is 6-8 min.
The application of the polyurethane material for the high-strength breathable medical fixing splint is characterized in that: the polyurethane combined polyether is used for medical fixing splints.
Compared with the prior common polyurethane combined polyether material, the invention has the following beneficial effects:
(1) according to the invention, four kinds of polyether polyol which are independently developed are adopted for compounding, wherein two kinds of polyether polyol are characteristic polyether polyol which are specially developed for the medical fixing splint, the opening ratio of the foam can be obviously improved, the air permeability of the foam is increased, and the polyurethane foam generated after the reaction of the produced component A and the component B has higher compression strength and can support and protect the injured joint;
(2) the invention uses the mixture of polymeric diphenylmethane diisocyanate and propylene carbonate as the component B, has little heat release during reaction, reduces the internal reaction temperature, ensures that the surface temperature is low, and does not generate burning sensation when being contacted with the skin during curing and forming;
(3) the component A and the component B are prepared at normal temperature, and the mixing reaction of the component A and the component B is also carried out at normal temperature, so that the production energy consumption is low, and the production operation is simple; the volatilization is low in the preparation process, and three wastes are not generated; the component A and the component B are stored separately, the material storage time is long, the material is not easy to oxidize and deteriorate, the component A and the component B are mixed when the medical fixing splint is used, the use is convenient and quick, and the prepared medical fixing splint is light in weight and high in strength.
Detailed Description
The present invention is further illustrated by the following examples, but the scope of the present invention is not limited thereto, and modifications of the technical solutions of the present invention by those skilled in the art should be within the scope of the present invention.
The process is conventional unless otherwise specified, and the starting materials are commercially available from the open literature.
Examples 1 to 8
The amounts of the raw materials for examples 1-8, in kg, were as shown in tables 1 and 2 and were prepared as follows:
(1) the component A comprises: stirring and mixing polyether polyol I, polyether polyol II, polyether polyol III, polyether polyol IV, a foam stabilizer, water, a catalyst I, a catalyst II, a catalyst III and a catalyst IV uniformly to prepare a dry white material, and mixing the dry white material and the LBA through a static premixer to form uniform and stable liquid to obtain a component A;
(2) and B component: mixing the crude MDI and propylene carbonate according to a proportion to obtain a component B;
(3) and uniformly mixing the component A and the component B in proportion, pouring the mixture into a mold, and curing and molding to obtain the high-strength breathable polyurethane material for the medical fixing splint.
Comparative examples 1 to 4
The amounts of the raw materials for examples 1-8, in kg, were as shown in tables 1 and 2 and were prepared as follows:
(1) the component A comprises: stirring and mixing all the raw materials except the LBA in the component A uniformly to prepare a dry white material, and then mixing the dry white material and the LBA through a static premixer to form uniform and stable liquid to obtain the component A;
(2) and B component: mixing the crude MDI and propylene carbonate according to a proportion or directly using the crude MDI to obtain a component B;
(3) and uniformly mixing the component A and the component B in proportion, pouring the mixture into a mold, and curing and molding to obtain the polyurethane material.
The products prepared in examples 1-8 and comparative examples 1-4 were subjected to performance tests according to national standards GB/T8813-2008, GB/T10799-2008 and GB/T37624-2019, and the test results are shown in tables 1-3.
Table 1 raw material amounts and product performance test results of examples 1-4
Table 2 raw material amounts and product performance test results for examples 5-8
TABLE 3 raw material amounts and product Performance test results for comparative examples 1-4
As can be seen from tables 1-3, the polyurethane material prepared by the invention has the advantages of high compression strength, high aperture ratio, short forming time, good dimensional stability, small TVOC value, fast heat dissipation in the reaction process, high strength and good air permeability; compared with the examples, the comparative examples 1 and 2 do not contain or contain a small amount of special polyether polyol INOVOL S5000T, the open cell ratio of the prepared polyurethane foam is obviously reduced, the TVOC value is slightly increased, the heat loss in the reaction process is slow, and the air permeability is poor; compared with the embodiment, the comparative example 3 does not contain special polyether polyol INOVOL S227, so that the product forming time is obviously increased, the compression strength is also reduced, and the strength is insufficient; comparative example 4 compared to the examples, the use of only crude MDI as component B reduced the compressive strength of the product and the heat loss during the reaction was slower.
Claims (10)
1. The high-strength breathable polyurethane material for the medical fixing splint consists of a component A and a component B, and is characterized in that: the component A comprises the following raw materials in parts by mass:
wherein the total mass portion of the polyether polyol I, the polyether polyol II, the polyether polyol III and the polyether polyol IV is 100 portions;
the component B is a mixture of polymeric diphenylmethane diisocyanate and propylene carbonate according to the mass ratio of 100: 8-15;
the mixing mass ratio of the component A to the component B is 1: 1.0-1.4.
2. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the polyether polyol I is prepared by ring-opening polymerization of sucrose and diethylene glycol as initiators and propylene oxide, and has a functionality of 4.8-5.2 and a hydroxyl value of 370-390 mgKOH/g.
3. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the polyether polyol II is prepared by ring-opening polymerization of sorbitol and water as initiators and propylene oxide, and has a functionality of 5.5-5.8 and a hydroxyl value of 450-470 mgKOH/g.
4. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the polyether polyol III is prepared by ring-opening polymerization of propylene glycol as an initiator and propylene oxide, and has the functionality of 2 and the hydroxyl value of 260-280 mgKOH/g.
5. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the polyether polyol IV is prepared by taking propylene glycol as an initiator and carrying out ring-opening polymerization with propylene oxide, and has the functionality of 3 and the hydroxyl value of 33-35 mgKOH/g.
6. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the foam stabilizer was M-88308.
7. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the catalyst I is PT 303; catalyst II is alcohol solution of 33% triethylene diamine; the catalyst III is dimethylbenzylamine; and the catalyst IV is methyl ammonium salt.
8. The polyurethane material for a high-strength breathable medical fixing splint according to claim 1, wherein: the blowing agent is HFO-1233 zd.
9. A method for preparing the polyurethane material for the high-strength breathable medical fixing splint according to any one of claims 1 to 8, wherein the polyurethane material comprises: the method comprises the following steps:
(1) the component A comprises: stirring and mixing polyether polyol I, polyether polyol II, polyether polyol III, polyether polyol IV, a foam stabilizer, water, a catalyst I, a catalyst II, a catalyst III and a catalyst IV uniformly to prepare a dry white material, and mixing the dry white material with a foaming agent to obtain a component A;
(2) and B component: mixing polymeric diphenylmethane diisocyanate and propylene carbonate to obtain a component B;
(3) and uniformly mixing the component A and the component B, pouring the mixture into a mold, and curing and molding for 6-8min to obtain the high-strength breathable polyurethane material for the medical fixing splint.
10. Use of the polyurethane material for the high-strength breathable medical splint according to any of claims 1 to 8, wherein: is used for medical fixing splints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273870.5A CN110964163A (en) | 2019-12-12 | 2019-12-12 | High-strength breathable polyurethane material for medical fixing splint and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273870.5A CN110964163A (en) | 2019-12-12 | 2019-12-12 | High-strength breathable polyurethane material for medical fixing splint and preparation method and application thereof |
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| CN110964163A true CN110964163A (en) | 2020-04-07 |
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| CN201911273870.5A Withdrawn CN110964163A (en) | 2019-12-12 | 2019-12-12 | High-strength breathable polyurethane material for medical fixing splint and preparation method and application thereof |
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| CN (1) | CN110964163A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114437662A (en) * | 2021-12-29 | 2022-05-06 | 山东一诺威新材料有限公司 | Industrial environment-friendly polyurethane adhesive and preparation method and application thereof |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114437662A (en) * | 2021-12-29 | 2022-05-06 | 山东一诺威新材料有限公司 | Industrial environment-friendly polyurethane adhesive and preparation method and application thereof |
| CN114437662B (en) * | 2021-12-29 | 2023-12-12 | 山东一诺威新材料有限公司 | Industrial environment-friendly polyurethane adhesive and preparation method and application thereof |
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Application publication date: 20200407 |