CN110699021A - Special hot-melt pressure-sensitive adhesive for surgical hole towel and preparation method thereof - Google Patents
Special hot-melt pressure-sensitive adhesive for surgical hole towel and preparation method thereof Download PDFInfo
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- CN110699021A CN110699021A CN201911015788.2A CN201911015788A CN110699021A CN 110699021 A CN110699021 A CN 110699021A CN 201911015788 A CN201911015788 A CN 201911015788A CN 110699021 A CN110699021 A CN 110699021A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J153/00—Adhesives based on block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Adhesives based on derivatives of such polymers
- C09J153/02—Vinyl aromatic monomers and conjugated dienes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention discloses a special hot-melt pressure-sensitive adhesive for an operation hole towel, which comprises the following preparation raw materials in parts by weight: 10-20 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-isoprene-styrene block copolymer, 3-7 parts of tackifier, 1-3 parts of dispersant, 0.5-2 parts of filler and 0.05-0.2 part of antioxidant. The hot-melt pressure-sensitive adhesive can ensure enough initial viscosity to ensure that the operation hole towel is firmly attached to the skin of a patient, and keeps good adhesion force in the operation process, the viscosity slowly decreases along with the operation, when the operation is finished and the operation hole towel is taken down from a patient, the skin does not generate pain, and the discomfort of the patient is reduced.
Description
Technical Field
The invention relates to the field of medical supplies, in particular to a special hot-melt pressure-sensitive adhesive for an operation hole towel and a preparation method thereof.
Background
The surgical drape is a surgical drape specially used for performing surgical operation on a specific part of a patient, the surgical drape is provided with a hole which is arranged for a specific operation position, and a surgical operator can perform the operation on the preset hole. The early operation hole piece of cloth is mainly made by the cotton, because the restriction of cotton self performance, only can be used for simple shop sheet, but the complexity of modern surgery operation requires that novel operation hole piece of cloth can cooperate various materials to use according to the function of difference, like glue subsides, hot melt adhesive, honeycomb duct, collection liquid bag, shaping strip, curtain coating film, TPE elastic membrane, imbibition material, label paper etc..
The functions of the operation hole towel on the market are abundant enough, however, the operation convenience of an operator is required to be considered when the operation hole towel is used, the use feeling of patients is also required to be considered, the hot melt adhesive used for the operation hole towel in the past always seeks adhesiveness, the larger the hot melt adhesive is expected to be, the better the hot melt adhesive is, so that the situation that the hole towel falls off from the skin in the operation process cannot occur, but the patients have obvious pain feeling in the process of uncovering the hole towel after the operation is completed, the sufficient adhesiveness of the operation hole towel is ensured, and meanwhile, the discomfort of the patients is reduced as much as possible when the hole towel is uncovered, which is a direction in which the hot melt adhesive product is required.
Disclosure of Invention
In order to solve the above problems, the first aspect of the present invention provides a special hot melt pressure sensitive adhesive for surgical hole towels, which is prepared from the following raw materials, by weight: 10-20 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-isoprene-styrene block copolymer, 3-7 parts of tackifier, 1-3 parts of dispersant, 0.5-2 parts of filler and 0.05-0.2 part of antioxidant.
In a preferred embodiment, the melt index of the styrene-butadiene-styrene block copolymer is 0.1 to 5g/10 min.
As a preferred embodiment, the block ratio of the styrene-butadiene-styrene block copolymer is selected from a mixture of one or more of 20/80, 30/70, 40/60.
In a preferred embodiment, the melt index of the styrene-isoprene-styrene block copolymer is 5 to 20g/10 min.
In a preferred embodiment, the diblock content of the styrene-isoprene-styrene block copolymer is 40 to 60 wt%.
In a preferred embodiment, the tackifier is petroleum resin and/or rosin resin.
As a preferred embodiment, the dispersant is selected from one or more of stearic acid, paraffin, citrate, and phosphate.
As a preferred embodiment, the filler is selected from one or more of zinc oxide, titanium dioxide, fumed silica, montmorillonite powder and kaolin.
In a preferred embodiment, the antioxidant is selected from the group consisting of butylated hydroxyanisole, butylated hydroxytoluene, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], and n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
The second aspect of the invention provides a preparation method of the special hot-melt pressure-sensitive adhesive for the surgical hole towel, which comprises the following steps: adding the styrene-butadiene-styrene block copolymer, the styrene-isoprene-styrene block copolymer, the tackifier, the dispersant, the filler and the antioxidant into a reaction kettle, heating and stirring until the mixed materials are uniform and transparent, stopping stirring, discharging and packaging to obtain the styrene-butadiene-styrene block copolymer.
Has the advantages that: the special hot-melt pressure-sensitive adhesive for the operation hole towel provided by the invention can ensure enough initial viscosity, so that the operation hole towel is firmly attached to the skin of a patient, and good permanent adhesion force is kept in the operation process, the viscosity is slowly reduced along with the operation, when the operation is finished and the operation hole towel is taken down from the patient, the skin does not generate pain, and the discomfort of the patient is reduced.
Detailed Description
The invention will be further understood by reference to the following detailed description of preferred embodiments of the invention and the examples included therein. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. To the extent that a definition of a particular term disclosed in the prior art is inconsistent with any definitions provided herein, the definition of the term provided herein controls.
As used herein, a feature that does not define a singular or plural form is also intended to include a plural form of the feature unless the context clearly indicates otherwise. It will be further understood that the term "prepared from …," as used herein, is synonymous with "comprising," including, "comprising," "having," "including," and/or "containing," when used in this specification means that the recited composition, step, method, article, or device is present, but does not preclude the presence or addition of one or more other compositions, steps, methods, articles, or devices. Furthermore, the use of "preferred," "preferably," "more preferred," etc., when describing embodiments of the present application, is meant to refer to embodiments of the invention that may provide certain benefits, under certain circumstances. However, other embodiments may be preferred, under the same or other circumstances. In addition, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
In order to solve the above problems, the first aspect of the present invention provides a special hot melt pressure sensitive adhesive for surgical hole towels, which is prepared from the following raw materials, by weight: 10-20 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-isoprene-styrene block copolymer, 3-7 parts of tackifier, 1-3 parts of dispersant, 0.5-2 parts of filler and 0.05-0.2 part of antioxidant.
In some preferred embodiments, the raw materials for preparing the hot-melt pressure-sensitive adhesive comprise the following components in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
Styrene-butadiene-styrene block copolymers
Styrene-butadiene-styrene block copolymers, i.e. SBS, S stands for styrene and B for butadiene, with styrene polymer segments at both ends and a butadiene polymer segment in the middle of the polymer. SBS has low cost, large output, good mechanical property, electrical property, processing property and the like, and is widely applied to the fields of rubber, resin, adhesive and the like.
In some preferred embodiments, the styrene-butadiene-styrene block copolymer has a melt index of 0.1 to 5g/10 min.
In some preferred embodiments, the styrene-butadiene-styrene block copolymer has a block ratio selected from a mixture of one or more of 20/80, 30/70, 40/60; further preferably, the block ratio of the styrene-butadiene-styrene block copolymer is 20/80.
The block ratio of the styrene-butadiene-styrene block copolymer in the present invention refers to the mass ratio of styrene and butadiene in the copolymer, and the test method thereof is any one well known to those skilled in the art, such as liquid chromatography.
The styrene-butadiene-styrene block copolymer of the present invention is produced by the Huaxing petrochemical Co., Ltd. of Baling, and its trade name is YH-791, YH-792, and YH-796, preferably YH-796, and its melt index of superior products is 3 to 5g/10min (average value is 4g/10min), and the block ratio is 20/80.
Styrene-isoprene-styrene block copolymer
Styrene-isoprene-styrene block copolymers, i.e. SIS, S stands for styrene and I for isoprene, with styrene polymer segments at both ends and isoprene polymer segment in the middle of the polymer. SIS is a sister product of SBS, has good compatibility with SBS, and can be applied to industries of medical treatment, electric, packaging, composite film and the like.
In some preferred embodiments, the melt index of the styrene-isoprene-styrene block copolymer is 5 to 20g/10 min; further preferably, the melt index of the styrene-isoprene-styrene block copolymer is 5-15 g/10 min; further, the melt index of the styrene-isoprene-styrene block copolymer was 10g/10 min.
The melt index in the application refers to the melt index measured at 190 ℃ under 2.16kg pressure, and the test method is in accordance with GB/T3682-2000.
In some preferred embodiments, the diblock content of the styrene-isoprene-styrene block copolymer is 40 to 60 wt%; further preferably, the diblock content of the styrene-isoprene-styrene block copolymer is 45-55 wt%; further, the diblock content of the styrene-isoprene-styrene block copolymer was 50 wt%.
The diblock content of the styrene-isoprene-styrene block copolymer in the present invention refers to the mass percent of isoprene in the copolymer, and the test method thereof is any one well known to those skilled in the art, such as liquid chromatography.
The styrene-isoprene-styrene block copolymer of the present invention is produced by Shandong PolySeng technology Co., Ltd, and its trade name is 1120, 1209, 1250, preferably 1250, and its melt index is 10g/10min, and its diblock content is 50 wt%.
Adhesion promoter
The tackifier is an additive capable of improving the viscosity of the sizing material, and the polarity of the hot-melt pressure-sensitive adhesive changes after the tackifier is added, so that the adhesive force of the sizing material on the difficult-to-adhere material can be improved.
In some preferred embodiments, the tackifier is selected from petroleum resins and/or rosin resins; more preferably, the tackifier is petroleum resin.
In some preferred embodiments, the petroleum resin is a C5 petroleum resin.
In some preferred embodiments, the C5 petroleum resin has a softening point of 90-100 ℃; more preferably, the softening point of the C5 petroleum resin is 95-105 ℃.
The softening point of the petroleum resin in the present invention was tested according to ETM 22-24.
The C5 petroleum resin is produced by Exxon Mobil, and the grades can be Escorez 1204, Escorez1304, Escorez 1401 and Escorez 1102, and Escorez 1102 is preferable, the softening point range is 95-105 ℃, and the typical value is 98.7 ℃.
Dispersing agent
The dispersing agent is an additive capable of improving the arrangement state of partial molecular chains in a polymer, and can weaken the van der Waals force among polymer molecules, increase the mobility of the molecular chains and reduce the crystallinity of the polymer after being added.
In some embodiments, the dispersant may list epoxy esters, stearic acid, paraffin, citric acid esters, phosphate esters; preferably, the dispersant is one or more selected from stearic acid, paraffin, citrate and phosphate.
In some embodiments, the epoxy acid ester may be exemplified by epoxidized soybean oil, epoxidized linseed oil, epoxidized octyl stearate, epoxidized octyl oleate, epoxidized butyl oleate, epoxidized decyl oleate.
In some preferred embodiments, the citric acid ester may be exemplified by triethyl citrate, tributyl citrate, trioctyl citrate, acetyl tributyl citrate, acetyl trioctyl citrate.
In some embodiments, the phosphate ester may be exemplified by tricresyl phosphate, triphenyl phosphate, trioctyl phosphate, tributyl phosphate, tridecyl phosphate.
In some further preferred embodiments, the dispersant is stearic acid and/or paraffin wax; further, the dispersant is paraffin wax.
In some preferred embodiments, the paraffin wax has a melting point of 50 to 60 ℃; further preferably, the melting point of the paraffin is 56-60 ℃; furthermore, the melting point of the paraffin is 58-60 ℃.
The paraffin wax (CAS number: 8002-74-2) is produced by Hainan union energy Co., Ltd., Guangdong, and the brand number is No. 58.
Filler material
The filler is added into the hot melt adhesive, so that the production cost can be reduced, various properties of the adhesive can be improved, and the filler can be selected to improve the mechanical property or the electrical property, the heat resistance, the wear resistance and the like according to different requirements.
In some embodiments, the filler may list quartz powder, boron carbide, graphite, metal oxides, kaolin, montmorillonite powder, attapulgite.
In some preferred embodiments, the filler is selected from a mixture of one or more of zinc oxide, titanium dioxide, fumed silica, montmorillonite powder, kaolin; further preferably, the filler is selected from one or more of zinc oxide, titanium dioxide and montmorillonite powder; furthermore, the filler is titanium dioxide.
The titanium dioxide (CAS number: 13463-67-7) in the invention is produced by DuPont and is R902.
Antioxidant agent
The performance reduction caused by the oxidation of unsaturated bonds in a system can be reduced by adding a small amount of antioxidant into the hot melt adhesive, and the storage time and the effective time of the hot melt adhesive are prolonged.
In some preferred embodiments, the antioxidant is selected from the group consisting of butylated hydroxyanisole, dibutyl hydroxytoluene, pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], and a mixture of one or more of n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate; further preferably, the antioxidant is pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and/or n-octadecyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate; further, the antioxidant is pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ].
The pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] (antioxidant 1010, CAS number: 6683-19-8) in the present invention was produced by Fushan Yuansheng chemical Co., Ltd.
In some preferred embodiments, the ratio of the styrene-butadiene-styrene block copolymer to the styrene-isoprene-styrene block copolymer to the dispersant is (5-7): (8-10): 1; further preferably, the ratio of the styrene-butadiene-styrene block copolymer, the styrene-isoprene-styrene block copolymer and the dispersant is 6: 9: 1.
the inventor finds that when the specific SBS, the SIS and the dispersing agent are selected and mixed according to a specific proportion, the hot melt pressure sensitive adhesive special for the surgical hole towel with high initial viscosity and good stability in the surgical process can be prepared, and the hot melt pressure sensitive adhesive can not cause pain and discomfort when being torn off from the skin of a patient, the inventor analyzes that although the melt index of the SBS and the SIS is lower, the hot melt pressure sensitive adhesive can provide higher viscosity, but the material has poor wettability to the skin surface and cannot be spread and soaked on the surface, the result is that the material has stronger viscosity and cannot form adhesion to the surface, the pressure sensitivity is poor, the block ratio of the SBS and the diblock content of the SIS need to be further limited, when the block ratio of the SBS is 20/80, and the diblock content of the SIS is 50 wt%, the flexible butadiene and isoprene chain segments can smoothly enter the concave of the surface to form adhesion, and the initial viscosity is improved, however, when the styrene content is low, the adhesive surface is peeled off from the skin, and the adhesive surface has strong adhesion and weak cohesion, so that not only a person feels pain, but also a residual amount of the adhesive remains on the skin surface. The dispersant is used for avoiding the reduction of mechanical properties caused by excessive entanglement among long molecular chains in the hot melt adhesive and improving the easiness in cutting of rubber compounds in the production process, but the inventor unexpectedly discovers that the pain feeling when the hole towel is torn off can be reduced by adding the specific dispersant, and the possible reason is that the air permeability of the hot melt adhesive is weakened to a certain extent by adding the specific dispersant paraffin, a small amount of sweat permeates out of skin pores in the operation process to replace an adhesive or promote the hydrolysis of the adhesive, the viscosity of the hot melt adhesive is gradually reduced along with the operation until the operation is finished, when the operation hole towel is taken off from a patient, the patient hardly feels the pain feeling, the rubber compounds can not be left on the skin, if the operation time is short, the paraffin can still have the effect of reducing the pain feeling of the skin, and the possible reason is that the volume of the paraffin molecules is large, inside the molecular structure of difficult retention hot melt adhesive, consequently can migrate to the hot melt adhesive surface, when the face of gluing pressed to skin, paraffin had certain lubricity, also can occupy partial surface depressed position, reduced adhesion area, so can reduce the pain and feel, avoid the binder to remain on the skin surface. If the dosage of SBS or SIS in the hot melt adhesive is too much, the viscosity of the adhesive is too high, so that people feel pain when tearing off the hot melt adhesive, and symptoms such as red swelling, pruritus and the like can be seriously caused, otherwise, the dosage is too little, and the hot melt adhesive is easy to fall off in the operation process, so that the normal operation of the operation is influenced; if the dosage of the dispersing agent is too much, the initial viscosity of the hot melt adhesive can be greatly reduced, otherwise, the dosage is too little, the product is not easy to discharge and cut in the production process, and the uncomfortable feeling of uncovering the hole towel can not be reduced. In addition, the tackifier can further adjust the viscosity of the hot melt adhesive, and the filler has a small amount of air holes around the filler due to poor compatibility with the hot melt adhesive, so that the problem of excessively reduced air permeability caused by paraffin can be solved.
The second aspect of the invention provides a preparation method of the special hot-melt pressure-sensitive adhesive for the surgical hole towel, which comprises the following steps: adding the styrene-butadiene-styrene block copolymer, the styrene-isoprene-styrene block copolymer, the tackifier, the dispersant, the filler and the antioxidant into a reaction kettle, heating and stirring until the mixed materials are uniform and transparent, stopping stirring, discharging and packaging to obtain the styrene-butadiene-styrene block copolymer.
Examples
The technical solution of the present invention will be described in detail below with reference to examples, but the scope of the present invention is not limited to the examples, and all the raw materials are commercially available unless otherwise specified.
Example 1
Embodiment 1 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The embodiment also provides a preparation method of the special hot-melt pressure-sensitive adhesive for the surgical hole towel, which comprises the following steps: adding the styrene-butadiene-styrene block copolymer, the styrene-isoprene-styrene block copolymer, the tackifier, the dispersant, the filler and the antioxidant into a reaction kettle, heating and stirring until the mixed materials are uniform and transparent, stopping stirring, discharging and packaging to obtain the styrene-butadiene-styrene block copolymer.
Example 2
Embodiment 2 provides a special hot-melt pressure-sensitive adhesive for a surgical hole towel, which comprises the following preparation raw materials in parts by weight: 10 parts of styrene-butadiene-styrene block copolymer, 10 parts of styrene-isoprene-styrene block copolymer, 3 parts of tackifier, 1 part of dispersant, 0.5 part of filler and 0.05 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 3
Embodiment 3 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 20 parts of styrene-butadiene-styrene block copolymer, 20 parts of styrene-isoprene-styrene block copolymer, 7 parts of tackifier, 3 parts of dispersant, 2 parts of filler and 0.2 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 4
Embodiment 4 provides a special hot-melt pressure-sensitive adhesive for a surgical hole towel, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 40/60.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 5
Embodiment 5 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 20 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 6
Embodiment 6 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersant is stearic acid.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 7
Embodiment 7 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 30/70.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 8
Embodiment 8 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 71 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 9
Embodiment 9 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 12 parts of styrene-butadiene-styrene block copolymer, 12 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Example 10
Embodiment 10 provides a special hot-melt pressure-sensitive adhesive for surgical hole towels, which is prepared from the following raw materials in parts by weight: 18 parts of styrene-butadiene-styrene block copolymer, 18 parts of styrene-isoprene-styrene block copolymer, 5 parts of tackifier, 2 parts of dispersant, 1 part of filler and 0.1 part of antioxidant.
The melt index of the styrene-butadiene-styrene block copolymer is 3-5 g/10min, and the block ratio is 20/80.
The melt index of the styrene-isoprene-styrene block copolymer is 10g/10min, and the diblock content is 50 wt%.
The tackifier is C5 petroleum resin and has a softening point of 98.7 ℃.
The dispersing agent is paraffin, and the melting point is 58-60 ℃.
The filler is titanium dioxide.
The antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (antioxidant 1010).
The present example also provides a method for preparing the special hot melt pressure sensitive adhesive for the surgical hole towel, which is similar to the method in example 1.
Evaluation of Performance
The special hot-melt pressure-sensitive adhesive for the surgical hole towel obtained in the embodiment 1-10 is tested, and the test contents comprise initial adhesion, permanent adhesion and subjective evaluation.
1. Initial viscosity: according to GB/T4852-2The hot melt pressure sensitive adhesive obtained in examples 1 to 10 was coated on a PET film to prepare a test piece for testing, and the test result is the maximum ball number adhered to the test piece, and the result is shown in table 1.
2. Permanent adhesion: according to GB/T4851-1998 method for testing the permanent adhesion of pressure-sensitive adhesive tapes, 20-30 g/m2The hot melt pressure sensitive adhesive obtained in examples 1 to 10 was coated on a PET film to prepare a test piece for testing, and the test result is the time for which the test piece completely separated from the test plate, and the result is shown in table 1.
3. Subjective evaluation: the subjective evaluation comprises three items of pain feeling, skin surface change and sizing material residue, and the ratio is 20-30 g/m2The hot melt pressure sensitive adhesive obtained in examples 1 to 10 was applied to a PET film to prepare 10cm by 10cm test pieces, and the test pieces were attached to the arms of testers for 4 hours and then torn off, wherein the testers were 50 and divided into 10 groups, and 5 persons each tested the test pieces prepared in the same example. The pain sensation is classified into 5 grades, 5-extreme pain and pain sensation lasting for more than 5 seconds, 4-pain but pain sensation not more than 5 seconds, 3-slight pain sensation, 2-almost no pain, 1-completely no pain, and the test result is the total score given by 5 persons; skin surface changes including no change, reddened skin, whitish skin, pimples skin, test results were 3-person agreed upon evaluations; the rubber material residues are classified into 3 grades, 3-large residues, 2-small residues and 1-no residues, and the test result is given to 5 personsThe results are shown in Table 1.
TABLE 1
Through embodiment 1 ~ 10, can learn, through selecting for use specific SBS, SIS and dispersant to adjust the proportion of three, can prepare and obtain the special hot melt pressure sensitive adhesive that is applicable to operation hole piece of cloth, this kind of hot melt pressure sensitive adhesive can guarantee sufficient initial viscidity, makes operation hole piece of cloth firmly paste on the patient's skin to keep good holding power in the operation process, along with the operation goes on, viscidity slowly descends, when the operation was over and when taking off operation hole piece of cloth from the patient, the skin can not produce pain or other discomfort.
Finally, it should be understood that the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The special hot-melt pressure-sensitive adhesive for the surgical hole towel is characterized by comprising the following preparation raw materials in parts by weight: 10-20 parts of styrene-butadiene-styrene block copolymer, 10-20 parts of styrene-isoprene-styrene block copolymer, 3-7 parts of tackifier, 1-3 parts of dispersant, 0.5-2 parts of filler and 0.05-0.2 part of antioxidant.
2. The special hot-melt pressure-sensitive adhesive for the surgical hole towel as claimed in claim 1, wherein the melt index of the styrene-butadiene-styrene block copolymer is 0.1-5 g/10 min.
3. A hot melt pressure sensitive adhesive for surgical drapes as claimed in claim 2, wherein the block ratio of the styrene-butadiene-styrene block copolymer is selected from one or a mixture of 20/80, 30/70 and 40/60.
4. The special hot-melt pressure-sensitive adhesive for the surgical hole towel as claimed in claim 1, wherein the melt index of the styrene-isoprene-styrene block copolymer is 5-20 g/10 min.
5. A special hot-melt pressure-sensitive adhesive for surgical hole towels as claimed in claim 4, wherein the diblock content of the styrene-isoprene-styrene block copolymer is 40-60 wt%.
6. The special hot-melt pressure-sensitive adhesive for surgical hole towels as claimed in claim 1, wherein the tackifier is petroleum resin and/or rosin resin.
7. A hot-melt pressure-sensitive adhesive special for surgical hole towels as claimed in claim 1, wherein the dispersing agent is one or more selected from stearic acid, paraffin, citric acid ester and phosphate ester.
8. The special hot-melt pressure-sensitive adhesive for the surgical hole towel as claimed in claim 1, wherein the filler is one or more selected from zinc oxide, titanium dioxide, fumed silica, montmorillonite powder and kaolin.
9. A hot-melt pressure-sensitive adhesive for surgical drapes as claimed in claim 1, wherein the antioxidant is selected from one or more of butylated hydroxyanisole, dibutyl hydroxy toluene, pentaerythritol tetrakis [ β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and n-octadecyl β - (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
10. The preparation method of the special hot-melt pressure-sensitive adhesive for the surgical hole towel as claimed in any one of claims 1 to 9, characterized by comprising the following steps: adding the styrene-butadiene-styrene block copolymer, the styrene-isoprene-styrene block copolymer, the tackifier, the dispersant, the filler and the antioxidant into a reaction kettle, heating and stirring until the mixed materials are uniform and transparent, stopping stirring, discharging and packaging to obtain the styrene-butadiene-styrene block copolymer.
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