WO2019132845A1 - Photo-vulcanization of latex together with photoinitiator - Google Patents
Photo-vulcanization of latex together with photoinitiator Download PDFInfo
- Publication number
- WO2019132845A1 WO2019132845A1 PCT/TR2018/050912 TR2018050912W WO2019132845A1 WO 2019132845 A1 WO2019132845 A1 WO 2019132845A1 TR 2018050912 W TR2018050912 W TR 2018050912W WO 2019132845 A1 WO2019132845 A1 WO 2019132845A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- latex
- photovulcanization
- application method
- photo
- initiator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
-
- 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
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/24—Crosslinking, e.g. vulcanising, of macromolecules
- C08J3/26—Crosslinking, e.g. vulcanising, of macromolecules of latex
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/45—Heterocyclic compounds having sulfur in the ring
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
- C08L7/02—Latex
-
- 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
- C08J2307/00—Characterised by the use of natural rubber
- C08J2307/02—Latex
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Definitions
- the present invention relates to a photo-vulcanization application method together with 2 nd type photo-initiator with single component which show both initiator and thiol-en cross binding characteristics for latex used in the production of said products, in order to prevent allergic reactions which occur in the users of products, made of natural rubber (NR) latex material, like catheters, bandages or surgery control gloves.
- NR natural rubber
- Vulcanization is defined as three-dimensional binding of polymer chains, forming rubber to each other under temperature or under light with the help of vulcanizing substances with cross bindings.
- the cross-binding characteristic depends on the amount, the activity and the reaction duration of the substance which provides vulcanization.
- Photo-vulcanization is the curing reaction of natural rubber under UV light by means of thiol-en cross-binders and photo-initiator systems.
- Photo-vulcanization has superior characteristics when compared with vulcanization like rapid curing and reduction of reaction speed and production at room temperature or with minimum heat. Moreover, it is important that the toxic effect of the chemicals and products used in said reactions is low.
- NR latex material natural rubber (NR) latex material.
- Immersed NR latex materials have important characteristics like flexibility, resistance and recovery, however, the increase of latex allergies which occur firstly in the 1970s in users, makes said characteristics unimportant.
- NR latex product allergies result from type I latex hypersensitivity, natural rubber proteins.
- Type IV latex sensitivity occurs due to rubber additive substances.
- the allergy which occurs due to touch is observed as nasal flow, burning in eyes and rubescence 24-96 hours after being subjected to.
- sulphur at 135-160°C.
- the substances, which accelerate or decelerate reaction and the substances which increase resistance and hardness, plasticizers, softeners, ageing retardants, cheapening substances, can be mostly added as additive substance to rubber. Since 1920s, dithio-carbamates and thioureas are used as accelerators for decreasing reaction temperature and reaction duration in sulphur-vulcanization process.
- the formulation formed as a result of photo-vulcanization comprises latex, initiator, thiol-en cross-binder and solvent.
- the initiator and thiol-en cross binder usage is important and the initiator interacts with UV light and curing is realized.
- the compounds comprising 2-SH and 3-SH are used as thiol-en cross-binders. Most of these cross-binders has strong odor. Moreover, as a result of realization of curing, yellowing occurs.
- the usage of organic solvents as solvent leads to another disadvantage in terms of green chemistry.
- the present invention relates to photo-vulcanization of latex together with different initiators, for eliminating the above mentioned disadvantages and for bringing new advantages to the related technical field.
- the object of the present invention is to apply photo-vulcanization together with different initiators to the latex used in the production of said products, in order to prevent allergic reactions which occur in the users of products made of natural rubber (NR) latex material.
- NR natural rubber
- the object of the present invention is to realize photo-vulcanization process by using a single-component photo-initiator as the cross-binder by means of the photopolymerization method.
- the object of the present invention is to obtain products from latex material which does not lead to allergic problems by not using additional cross-binder and additive substances in photo-vulcanization process.
- the object of the present invention is to provide a method for obtaining environment-friendly latex by using water as a solvent and by using odourless solutions and odourless synthesized substance.
- the present invention relates to photovulcanization application method together with second type photo-initiator with single component and which has both initiator and thiol-en cross-binding characteristic.
- the present invention relates to the method of application of photovulcanization together with second type photo-initiator with single component and which has both initiator and thiol-en cross-binder characteristics.
- the subject matter method comprises the steps of: a. Dissolving 2-mercapto thioxanthone with distilled water
- 2-mercapto thioxanthone:latex proportion can have a value between 0.001 :1 and 1 :1.
- steps b, c, d and e are realized at room temperature.
- the present invention relates to the latex product which is compliant to the present invention and which is obtained by means of the method whose steps are provided above.
- Said latex product is different from the latex products present in the known state of the art in that said latex product does not include the compounds which lead to allergy and thus, said latex product has anti-allergic effect.
- the latex obtained by means of the subject matter method and which does not include allergenic photo-initiators, is used in preparation of products like medical examination glove, surgical glove, adhesive band, endotracheal tubes, epidural catheter injection adaptors, condom.
- Example 1 Method of application of photo-vulcanization to latex:
- the vulcanization process is realized.
- Example 2 Determination of characteristics of the product obtained by means of the subject matter method:
- FTIR spectrums are utilized and the reaction capability of the subject matter method is determined.
- FTIR spectrums are taken and the decrease observed at the peak at 1640cm -1 is recorded and transformation percent is calculated.
- the mechanical characteristics of the films are determined at room temperature by means of tension-extension device.
- the films whose thickness is known are cut by means of dumbbell-shaped apparatus.
- the force value and tension are calculated according to equation 1 and equation 2. And afterwards, after force value and tension are calculated, the tension-extension graphic of the NR latex films is drawn.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials For Medical Uses (AREA)
- Gloves (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The present invention relates to a photovulcanization application method together with 2nd type photo-initiator with single component which shows both initiator and thiol-en cross- binding characteristics for latex used in the production of said products, in order to prevent allergic reactions which occur in the users of products, made of natural rubber (NR) latex material, like catheters, bandages or surgery control gloves.
Description
PHOTO-VULCANIZATION OF LATEX TOGETHER WITH PHOTOINITIATOR
TECHNICAL FIELD
The present invention relates to a photo-vulcanization application method together with 2nd type photo-initiator with single component which show both initiator and thiol-en cross binding characteristics for latex used in the production of said products, in order to prevent allergic reactions which occur in the users of products, made of natural rubber (NR) latex material, like catheters, bandages or surgery control gloves.
KNOWN STATE OF THE ART
Vulcanization is defined as three-dimensional binding of polymer chains, forming rubber to each other under temperature or under light with the help of vulcanizing substances with cross bindings. The cross-binding characteristic depends on the amount, the activity and the reaction duration of the substance which provides vulcanization. Photo-vulcanization is the curing reaction of natural rubber under UV light by means of thiol-en cross-binders and photo-initiator systems.
Photo-vulcanization has superior characteristics when compared with vulcanization like rapid curing and reduction of reaction speed and production at room temperature or with minimum heat. Moreover, it is important that the toxic effect of the chemicals and products used in said reactions is low.
In the known state of the art, catheters, bandages or surgery control gloves are made of natural rubber (NR) latex material. Immersed NR latex materials have important characteristics like flexibility, resistance and recovery, however, the increase of latex allergies which occur firstly in the 1970s in users, makes said characteristics unimportant.
NR latex product allergies result from type I latex hypersensitivity, natural rubber proteins. Type IV latex sensitivity occurs due to rubber additive substances. The allergy which occurs due to touch is observed as nasal flow, burning in eyes and rubescence 24-96 hours after being subjected to.
In order to transform rubber into tire form, it shall be vulcanized with sulphur at 135-160°C. The substances, which accelerate or decelerate reaction and the substances which increase resistance and hardness, plasticizers, softeners, ageing retardants, cheapening substances, can be mostly added as additive substance to rubber. Since 1920s, dithio-carbamates and thioureas are used as accelerators for decreasing reaction temperature and reaction duration in sulphur-vulcanization process.
In the present art, with the worry that the accelerators, existing as residue particularly in medical and surgical gloves, may lead to health problems, alternative cross-binding processes are tried to be developed by means of methods like hardening with peroxides or high energy radiation (IR wave, Y rays).
In the recent years, latex formulations, cured with laboratory scaled UV, have been developed and problems occur like weakness in the physical characteristics, high investment cost and production cost and the usage of acrylic monomers. By means of thiol-en reaction which is another method, UV pre-vulcanization of NR latex forms a new approach for production of bio-compliant surgical glove without catalyst.
The formulation formed as a result of photo-vulcanization comprises latex, initiator, thiol-en cross-binder and solvent. In the photo-vulcanization process, the initiator and thiol-en cross binder usage is important and the initiator interacts with UV light and curing is realized. In order to realize photo-vulcanization, the compounds comprising 2-SH and 3-SH are used as thiol-en cross-binders. Most of these cross-binders has strong odor. Moreover, as a result of realization of curing, yellowing occurs. The usage of organic solvents as solvent leads to another disadvantage in terms of green chemistry.
As a result, because of the abovementioned disadvantages and deficiencies, an improvement is needed in the related technical field.
OBJECT OF THE INVENTION
The present invention relates to photo-vulcanization of latex together with different initiators, for eliminating the above mentioned disadvantages and for bringing new advantages to the related technical field.
The object of the present invention is to apply photo-vulcanization together with different initiators to the latex used in the production of said products, in order to prevent allergic reactions which occur in the users of products made of natural rubber (NR) latex material.
The object of the present invention is to realize photo-vulcanization process by using a single-component photo-initiator as the cross-binder by means of the photopolymerization method.
The object of the present invention is to obtain products from latex material which does not lead to allergic problems by not using additional cross-binder and additive substances in photo-vulcanization process.
The object of the present invention is to provide a method for obtaining environment-friendly latex by using water as a solvent and by using odourless solutions and odourless synthesized substance.
In order to realize the abovementioned objects, the present invention relates to photovulcanization application method together with second type photo-initiator with single component and which has both initiator and thiol-en cross-binding characteristic.
The structural and characteristic properties and all advantages of the present invention will be understood in a clearer manner thanks to the detailed description given below and therefore, evaluation shall be made by taking into consideration this detailed description.
DETAILED DESCRIPTION OF THE INVENTION
In this detailed description, in order to prevent allergic reactions which occur in the users of products made of natural rubber (NR) latex material, the method of application of photo vulcanization together with different initiators to the latex used in production of said products, is explained with references to examples without forming any restrictive effect only in order to make the subject more understandable.
The present invention relates to the method of application of photovulcanization together with second type photo-initiator with single component and which has both initiator and thiol-en cross-binder characteristics.
Accordingly, the subject matter method comprises the steps of:
a. Dissolving 2-mercapto thioxanthone with distilled water
b. Adding the obtained 2-mercapto thioxanthone mixture to latex
c. Mixing the obtained mixture until the mixture becomes homogeneous
d. Coating the mixture, obtained in step c), onto the plate
e. Subjecting the mixture, coated onto the plate, to UV light and curing said mixture.
In the subject matter method, 2-mercapto thioxanthone:latex proportion can have a value between 0.001 :1 and 1 :1.
In the subject matter method, steps b, c, d and e are realized at room temperature.
From another perspective, the present invention relates to the latex product which is compliant to the present invention and which is obtained by means of the method whose steps are provided above. Said latex product is different from the latex products present in the known state of the art in that said latex product does not include the compounds which lead to allergy and thus, said latex product has anti-allergic effect.
Another item of the present invention is that the latex, obtained by means of the subject matter method and which does not include allergenic photo-initiators, is used in preparation of products like medical examination glove, surgical glove, adhesive band, endotracheal tubes, epidural catheter injection adaptors, condom.
Within the scope of this specification, the statement“comprises” is aimed to mean“covers”.
In places which are technically appropriate, the applications of the invention can be joined.
Applications are described here in a manner comprising specific characteristics/elements. The specification moreover covers the other applications comprising said characteristics/elements or consisting said characteristics/elements.
Technical references like patents and applications have been included to this specification by means of referencing.
Here, applications, which are described specifically and apparently, can form basis for a disclaimer in a stand-alone manner or together with one or some other application(s).
Now, the present invention will be explained with reference to the below mentioned examples which are only for exemplary purposes and which shall not be interpreted as limiting the scope of the present invention in any manner.
EXAMPLES
Example 1 : Method of application of photo-vulcanization to latex:
• 1 ml distilled water is added to 2-mercapto thioxanthone (TXSH) with initiator weighed with changing grams and dissolved in a beaker at room temperature,
• 2-mercapto thioxanthone (TXSH), dissolved in water, is added into 5 grams of latex,
• The obtained mixture is mixed at room temperature for 2 hours by means of magnetic stirrer,
• The obtained formulation is coated onto the glass plate,
• Afterwards the formulation coated onto the glass plate is subjected to the UV light by means of UV-curing device and curing process is realized.
By means of the subject matter method, the vulcanization process is realized.
Example 2: Determination of characteristics of the product obtained by means of the subject matter method:
• After the formulation is synthesized, FTIR spectrums are utilized and the reaction capability of the subject matter method is determined. As a result of subjecting the formulations to light for determined durations, FTIR spectrums are taken and the decrease observed at the peak at 1640cm-1 is recorded and transformation percent is calculated.
• The mechanical characteristics of the films are determined at room temperature by means of tension-extension device. The films whose thickness is known are cut by means of dumbbell-shaped apparatus.
• The tension force (F) and the extension amount (L) are recorded through the device.
The force value and tension are calculated according to equation 1 and equation 2. And afterwards, after force value and tension are calculated, the tension-extension graphic of the NR latex films is drawn.
Claims
1. In order to prevent allergic reactions which occur in the users of products made of natural rubber (NR) latex material, photovulcanization method is applied to the latex, used in production of said products, together with photo-initiator, characterized by comprising the steps of:
a. Dissolving 2-mercapto thioxanthone (TXSH), with initiator characteristic, in distilled water,
b. Adding the obtained 2-mercapto thioxanthone mixture to latex,
c. Mixing the obtained mixture until it becomes homogeneous,
d. Coating the mixture, obtained in step c, onto the plate,
e. Subjecting the mixture, coated onto the plate, to UV light and curing said mixture.
2. The photovulcanization application method according to claim 1 , wherein 2-mercapto- thioxanthone is used as photo-initiator.
3. The photovulcanization application method according to claim 1 , wherein in the photovulcanization process, UV-Vis illumination is used as the source.
4. The photovulcanization application method according to claim 1 -3, wherein 2- mercapto thioxanthone:latex proportion can have a value between 0.001 :1 and 1 :1.
5. The photovulcanization application method according to claim 1 -4, wherein steps b), c), d), e) are realized at room temperature.
6. Latex product obtained by means of the photovulcanization application method according to claim 1 -5.
7. Usage of the latex product, obtained by means of the photovulcanization application method according to claim 1 -5, in preparation of products like medical examination glove, surgical glove, adhesive band, endotracheal tubes, epidural catheter injection adaptors, condom.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020207019630A KR102474200B1 (en) | 2017-12-27 | 2018-12-27 | Photoinitiator and photo-vulcanization of latex |
| JP2020536220A JP7178120B2 (en) | 2017-12-27 | 2018-12-27 | Photovulcanization of latex applied with different initiators |
| MYPI2020003214A MY195633A (en) | 2017-12-27 | 2018-12-27 | Photo-Vulcanization of Latex Together with Different Initiators |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TR2017/22284 | 2017-12-27 | ||
| TR2017/22284A TR201722284A2 (en) | 2017-12-27 | 2017-12-27 | Photovulcanization of latex with different initiators |
| TR2018/20438A TR201820438A1 (en) | 2018-12-25 | 2018-12-25 | LATEXIN PHOTOVULCANIZATION WITH DIFFERENT INITIATORS |
| TR2018/20438 | 2018-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019132845A1 true WO2019132845A1 (en) | 2019-07-04 |
Family
ID=65724495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/TR2018/050912 Ceased WO2019132845A1 (en) | 2017-12-27 | 2018-12-27 | Photo-vulcanization of latex together with photoinitiator |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP7178120B2 (en) |
| KR (1) | KR102474200B1 (en) |
| MY (1) | MY195633A (en) |
| WO (1) | WO2019132845A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004033177A1 (en) * | 2002-10-10 | 2004-04-22 | Regent Medical Ltd. | Accelerator-free thin-walled rubber vulcanizates from latex |
| US20120084901A1 (en) * | 2009-03-17 | 2012-04-12 | Semperit Aktiengesellschaft Holding | Method for producing a cross-linked elastomer |
| WO2017116372A1 (en) * | 2015-12-31 | 2017-07-06 | Arsu Nergis | Preparation method of nanocomposite films comprising gold nanopoarticle via photopolymerization technique |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000005547A (en) * | 1996-04-19 | 2000-01-25 | 스프레이그 로버트 월터 | Process for radiation cross-linking polymers and radiation cross-linkable compositions |
| JP2002125985A (en) * | 2000-10-19 | 2002-05-08 | Okamoto Ind Inc | Thin film-like rubber product |
| JP2004018599A (en) * | 2002-06-13 | 2004-01-22 | Sumitomo Rubber Ind Ltd | Rubber product |
| JP2010180370A (en) * | 2009-02-09 | 2010-08-19 | Lintec Corp | Method for producing crosslinked rubber |
| US9114282B2 (en) * | 2012-05-30 | 2015-08-25 | Nike, Inc. | Game ball or other article of sports equipment printed with visible light-curable ink and method |
| JP6790427B2 (en) * | 2016-04-04 | 2020-11-25 | 住友ゴム工業株式会社 | Surface modification method |
-
2018
- 2018-12-27 WO PCT/TR2018/050912 patent/WO2019132845A1/en not_active Ceased
- 2018-12-27 KR KR1020207019630A patent/KR102474200B1/en active Active
- 2018-12-27 MY MYPI2020003214A patent/MY195633A/en unknown
- 2018-12-27 JP JP2020536220A patent/JP7178120B2/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004033177A1 (en) * | 2002-10-10 | 2004-04-22 | Regent Medical Ltd. | Accelerator-free thin-walled rubber vulcanizates from latex |
| US20120084901A1 (en) * | 2009-03-17 | 2012-04-12 | Semperit Aktiengesellschaft Holding | Method for producing a cross-linked elastomer |
| WO2017116372A1 (en) * | 2015-12-31 | 2017-07-06 | Arsu Nergis | Preparation method of nanocomposite films comprising gold nanopoarticle via photopolymerization technique |
Also Published As
| Publication number | Publication date |
|---|---|
| KR102474200B1 (en) | 2022-12-02 |
| KR20200094202A (en) | 2020-08-06 |
| JP2021509691A (en) | 2021-04-01 |
| MY195633A (en) | 2023-02-03 |
| JP7178120B2 (en) | 2022-11-25 |
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