KR102012666B1 - The composition for coating foam, the coating foam and the preparation method of the coating foam - Google Patents
The composition for coating foam, the coating foam and the preparation method of the coating foam Download PDFInfo
- Publication number
- KR102012666B1 KR102012666B1 KR1020160033455A KR20160033455A KR102012666B1 KR 102012666 B1 KR102012666 B1 KR 102012666B1 KR 1020160033455 A KR1020160033455 A KR 1020160033455A KR 20160033455 A KR20160033455 A KR 20160033455A KR 102012666 B1 KR102012666 B1 KR 102012666B1
- Authority
- KR
- South Korea
- Prior art keywords
- coating
- styrene
- foam composition
- coating foam
- foaming
- Prior art date
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/10—Copolymers of styrene with conjugated dienes
-
- 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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/005—Reinforced macromolecular compounds with nanosized materials, e.g. nanoparticles, nanofibres, nanotubes, nanowires, nanorods or nanolayered materials
-
- 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
- C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
-
- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/10—Encapsulated ingredients
-
- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/24—Plastics; Metallised plastics based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/245—Vinyl resins, e.g. polyvinyl chloride [PVC]
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
Styrene-butadiene-styrene (SBS) rubber, foaming agent, curing agent and curing structural modifier, wherein the curing structural modifier comprises polyfunctional crosslinking agent or inorganic nanoparticles, foaming maximum temperature of the blowing agent and one minute half life of the curing agent It provides a coating foam composition having a difference in temperature of 15 ℃ or less. In addition, it provides a coated foam of the coating foam composition. In addition, preparing the coating foam composition; And coating foaming the composition for coating foaming.
Description
The present invention relates to a composition suitable for coating foaming and a coating foam prepared using the same, and a method for preparing the coating foam.
Foams produced by various foaming methods are used in various applications throughout the industry. For example, it can be used for coupling between parts of electronic products, interior materials for interiors, interior and exterior materials of automobiles, heat insulating materials, and the like. In addition, the foam may be used as a substrate of a double-sided adhesive tape. The double-sided adhesive tape has a structure in which a pressure-sensitive adhesive layer is formed on both sides of the substrate, and variously designed thickness and peeling force, etc. according to the specific use of the double-sided adhesive tape. At this time, the base material of the double-sided adhesive tape accounts for most of the overall thickness of the double-sided adhesive tape, it also affects the peeling characteristics.
Commonly used foams include polyethylene foams or acrylic foams. For example, Korean Unexamined Patent Publication No. 10-2014-0070235 discloses a prepared foam composition comprising carbon dioxide for a polyethylene melt, and a polyethylene foam produced by extrusion molding such a foam composition is disclosed. In addition, for example, Korean Unexamined Patent Publication No. 10-2015-0123368 discloses an acrylic foam formed by curing an acrylic curable resin.
As such, many studies have been conducted to control physical properties and thicknesses of foams for various applications, and in particular, various studies have been conducted on methods of foaming foams and compositions of compositions for foam formation.
One embodiment of the present invention is a composition that is applied to the coating foaming method, and provides a coating foam composition showing excellent physical properties in terms of impact resistance and ability to achieve excellent durability based on uniform thickness and appropriate gel content .
Another embodiment of the present invention as a coating foam of the coating foam composition, may have a thin film structure of a uniform thickness, and provides a coating foam that simultaneously realizes excellent durability, impact resistance and the ability to extract.
Another embodiment of the present invention provides a method for producing the coated foam, having a suitable density and thickness, and provides a method for effectively producing a coated foam capable of simultaneously implementing the above-described excellent physical properties.
In one embodiment of the present invention, the styrene-butadiene-styrene (SBS) rubber, a foaming agent, a curing agent and a curing structural modifier, wherein the curing structural modifier comprises a multifunctional crosslinking agent or inorganic nanoparticles, the maximum foaming of the blowing agent It provides a coating foam composition wherein the difference between the temperature and the one-minute half-life temperature of the curing agent is 15 ° C. or less.
In another embodiment of the present invention, a coating foam of the coating foam composition is provided.
In another embodiment of the present invention, preparing the coating foam composition; And coating foaming the composition for coating foaming.
The coating foam composition and the coated foam thereby realizes improved durability based on the gel content of the desired level, and excellent impact resistance and the ability to extract, because it is applied as a substrate of the adhesive tape in terms of thickness uniformity Advantageous physical properties can be realized.
In addition, the manufacturing method of the coated foam may provide a method for producing a coated foam with high process efficiency by using the coating foam composition for implementing the above-mentioned advantages.
1 schematically shows a cross section of a coated foam according to one embodiment of the invention.
Figure 2 schematically shows a cross-section of the double-sided adhesive tape to which the coated foam according to an embodiment of the present invention is applied as a substrate.
Advantages and features of the present invention, and methods for achieving the same will be apparent with reference to the following embodiments. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms. The present embodiments are merely provided to make the disclosure of the present invention complete, and to fully convey the scope of the invention to those skilled in the art, and the present invention is defined by the scope of the claims. It will be. Like reference numerals refer to like elements throughout.
In the drawings, the thickness of layers, films, panels, regions, etc., are exaggerated for clarity. In the drawings, the thicknesses of layers and regions are exaggerated for clarity.
In addition, in this specification, when a part such as a layer, film, region, plate, or the like is said to be "on" or "upper" another part, it is not only when the other part is "right over" but also when there is another part in the middle. Also includes. On the contrary, when a part is "just above" another part, there is no other part in the middle. In addition, when a part such as a layer, a film, an area, or a plate is "below" or "below" another part, it is not only when the part is "below" but also another part in the middle. Include. In contrast, when a part is "just below" another part, there is no other part in the middle.
In one embodiment of the present invention, the styrene-butadiene-styrene (SBS) rubber, a foaming agent, a curing agent and a curing structural modifier, wherein the curing structural modifier comprises a multifunctional crosslinking agent or inorganic nanoparticles, the maximum foaming of the blowing agent It provides a coating foam composition wherein the difference between the temperature and the one-minute half-life temperature of the curing agent is about 15 ° C. or less.
The composition for coating foaming is a composition optimized for application to a coating foaming method. The coating foaming method is a method of forming a foam by foaming at the same time as the coating, an advantageous method for producing a foam having a thin thickness compared to the extrusion foaming method, or other foaming method in which the coating and foaming process is separated, As the thickness of the foam becomes thinner, it is difficult to form a foam having a uniform thickness.
In one embodiment of the present invention, the coating foam composition comprises a styrene-butadiene-styrene (SBS) rubber, the condition that the difference between the foaming maximum temperature of the blowing agent and the one-minute half-life temperature of the curing agent is about 15 ℃ or less By including together a satisfactory blowing agent and a curing agent it may be possible to produce a foam having a thin film structure of uniform thickness through the coating foaming method.
In addition, the coating foam composition contains a multi-functional cross-linking agent or a hardening structure control agent containing inorganic nanoparticles, to realize the excellent durability based on the appropriate gel content, and can implement the advantages of improving the impact resistance and the extraction force at the same time have.
In the present specification, the 'foaming maximum temperature' of the blowing agent means the temperature when the blowing agent expands to the maximum size when heat is applied to the coating foam composition. In addition, the "one-minute half-life temperature" of the curing agent is the temperature at which the amount of the curing agent is 1/2 after one minute has elapsed after the application of heat to the coating foam composition.
The difference between the foaming maximum temperature of the blowing agent and the one-minute half-life temperature of the curing agent may be about 15 ° C. or less, for example, about 10 ° C. or less, for example about 5 ° C. or less. More specifically, the maximum foaming temperature of the blowing agent and the one-minute half-life temperature of the curing agent may be the same. By adjusting the difference between the maximum foaming temperature of the blowing agent and the one-minute half-life temperature of the curing agent in the above-described range, the coating foam composition may be prepared as a coating foam having a thin film form having a uniform thickness, and the coating foam is excellent. Durability can be realized.
The coating foam composition includes styrene-butadiene-styrene (SBS) rubber. In this case, the styrene-butadiene-styrene (SBS) rubber is a copolymer of styrene and butadiene, and is a type of rubber distinct from styrene-butadiene rubber (SBR), which is commonly referred to, and contains relatively many structural units derived from styrene. It is rubber. When the coating foam composition includes styrene-butadiene-styrene (SBS) rubber, punchability, elongation, and tensile strength may be excellently realized as compared with other types of rubber such as polyethylene and polyacrylate.
The styrene-butadiene-styrene (SBS) rubber may have a content of about 20 wt% to about 35 wt% of a styrene-derived structural unit. The coating foam composition can realize more improved durability by using the styrene-butadiene-styrene (SBS) rubber of the content, to ensure excellent punching resistance and impact resistance of the coating foam prepared from the coating foam composition May be advantageous.
In addition, the styrene-butadiene-styrene (SBS) rubber may have a weight average molecular weight (Mw) of about 100,000 to about 400,000, for example, about 100,000 to about 150,000. As a result, compatibility of the styrene-butadiene-styrene (SBS) rubber with other components may be improved, and the coating foam composition may have an appropriate viscosity.
The coating foam composition comprises a blowing agent, the blowing agent has a structure of hollow particles. 'Hollow particles' are hollow particles, wherein 'spherical' does not mean a shape of a sphere that is geometrically perfect, but generally refers to a shape that is recognized as the shape of a sphere. In addition, the hollow means that no liquid or solid components are included, and gas components which are not visually recognized may be contained.
The blowing agent does not burst or lose its shape during the foaming of the coating foam composition, and may form a bubble structure in the coating foam as a form of itself. More specifically, when heat for foaming is applied to the coating foam composition, the blowing agent of the hollow particle structure expands and becomes large in size, and may form a bubble structure in the coated foam by the expanded form itself.
More specifically, the blowing agent is a core-shell structure, the core of the blowing agent is one selected from the group consisting of nitrogen (N 2 ) gas, hydrocarbon gas, hydrogen (H 2 ) gas and combinations thereof. Wherein the shell of the blowing agent comprises a thermoplastic resin.
Specifically, the thermoplastic resin of the shell may include one selected from the group consisting of polyethylene resin, polyvinyl chloride resin, polystyrene resin, polypropylene resin, polymethyl methacrylate resin, and combinations thereof.
In one embodiment, when the shell of the blowing agent is made of a thermoplastic resin and the core is made of a hydrocarbon gas, stability to heat and chemical stability can be easily ensured.
The particle diameter of the blowing agent may be about 10 μm to about 16 μm. The particle diameter of the blowing agent means the particle diameter of the blowing agent in the composition for coating foam, and indicates the size of the blowing agent itself before being expanded by heating. The particle diameter of the blowing agent can be derived by measuring the diameter of the projected image by SEM measurement method. Since the particle size of the blowing agent satisfies the above range, it may be excellent in dispersibility in the coating foam composition, it may be advantageous to ensure the appropriate density and surface roughness according to the fine control of the bubble size.
The coating foam composition includes a curing agent, and the curing agent is chemically crosslinked with the styrene-butadiene-styrene (SBS) rubber to serve to appropriately cure the coating foam composition.
For example, the curing agent may include one selected from the group consisting of dibenzoyl peroxide-based curing agent, dibutyl butyl peroxide-based curing agent, lauryl peroxide-based curing agent and combinations thereof. Including the curing agent having such a chemical structure, the curing agent may exhibit the advantage of being used with the styrene-butadiene-styrene (SBS) rubber to achieve excellent durability as compared to the curing agent having another chemical structure, styrene-butadiene-styrene ( SBS) resins have the advantage of mediating the bonds between the resins via radicals even if they are not modified to have separate functional groups for curing reactions, such as hydroxyl groups, carboxyl groups.
In one embodiment, the curing agent may include a dibenzoyl peroxide-based curing agent or a lauryl peroxide-based curing agent, in another embodiment, the curing agent may include a dibenzoyl peroxide-based curing agent. In this case, the difference between the foaming maximum temperature of the blowing agent and the one-minute half-life temperature of the curing agent is advantageous to satisfy the above-mentioned range, and the coated foam formed from the coating foam composition may implement improved durability and impact resistance.
The coating foam composition includes the curing agent and the blowing agent together with the styrene-butadiene-styrene (SBS) rubber, by using them in an appropriate content ratio can maximize the effect of improving the durability.
For example, the coating foam composition may include about 1 to about 10 parts by weight of the curing agent, based on 100 parts by weight of the styrene-butadiene-styrene (SBS) rubber, for example, about 3 to about 5 It may include parts by weight. By using the curing agent in this content, the compatibility with the styrene-butadiene-styrene (SBS) rubber is improved, and improved durability can be realized through the coating foam composition, and releasability due to proper adhesion of the surface can be obtained. .
In addition, the coating foam composition may include about 0.1 to about 1 part by weight of the blowing agent, based on 100 parts by weight of the styrene-butadiene-styrene (SBS) rubber, for example, about 0.2 to about 0.4 parts by weight It may include. By using the foaming agent in such a content, compatibility with the styrene-butadiene-styrene (SBS) rubber is improved, and improved durability can be realized through the coating foam composition, and desired specific density and thickness can be obtained.
The coating foam composition may further include one selected from the group consisting of carbon black, titanium dioxide (TiO 2 ), and a combination thereof within a range that does not reduce the required physical properties and effects. By further comprising this, the coated foam prepared from the coating foam composition may exhibit an appropriate color.
The coating foam composition includes a curing structural modifier. The hardening structure modifier is an additive for forming an additional hardening structure in addition to hardening by crosslinking of the styrene-butadiene-styrene (SBS) rubber and the hardener, and the coating foam composition may simultaneously realize improved impact resistance and ability to extract have.
The curing structural modifier may include a multifunctional crosslinking agent, inorganic nanoparticles, or both.
The multifunctional crosslinking agent is a compound having two or more functional groups capable of chemically reacting with the styrene-butadiene-styrene (SBS) rubber to form an additional crosslinked structure, for example, a polythiol compound, a polyacrylate compound, and It may include one selected from the group consisting of a combination thereof.
The polythiol compound is a compound having two or more thiol groups in one molecule, and may include, for example, a trifunctional to 5-functional polythiol compound, and may include, for example, a tetrafunctional polythiol compound. have. When the multifunctional crosslinking agent includes a polythiol compound having a thiol group in the above range, the impact resistance and the ability to improve the coating of the coating foam composition may be large.
The polyacrylate compound is a compound having two or more acrylate groups in one molecule, for example, may include a tri- or six-functional polyacrylate compound. When the multifunctional crosslinking agent includes a polyacrylate compound having an acrylate group in the above range, the impact resistance and the ability to improve the coating of the coating foam composition may be large.
The inorganic nanoparticles may be disposed between the styrene-butadiene-styrene (SBS) rubber and the curing agent or the polyfunctional crosslinking agent to chemically react to form a curing structure, thereby effectively controlling the curing structure.
The inorganic nanoparticles may have a particle size of about 1 nm to about 10 μm, for example, about 100 nm to about 500 nm. The inorganic nanoparticles may be mixed particles having various particle sizes within the above range.
The particle size of the inorganic nanoparticles is measured by measuring the largest length or diameter for one particle, and can be measured by SEM or TEM.
By the particle size of the inorganic nanoparticles satisfying the above range, it is possible to easily control the curing structure, the impact resistance and the ability to improve the impact of the coating foam composition can be large.
The inorganic nanoparticles may be made of silicate of a layered structure. The layered silicate is an inorganic compound in which plate-like silicates are stacked in layers. Since the inorganic nanoparticles are made of silicate having a layered structure, it may be easy to control the cured structure of the styrene-butadiene-styrene (SBS) rubber.
The layered silicate is an inorganic compound formed by the combination of one or more metal oxides with silica (SiO 2 ), and the metal oxide is aluminum oxide, potassium oxide, calcium oxide, magnesium oxide, sodium oxide, and the like. It may include one selected from the group consisting of a combination.
The coating foam composition may include about 0.5 parts by weight or more and less than about 2 parts by weight of the cured structural modifier based on 100 parts by weight of the styrene-butadiene-styrene (SBS) rubber, for example, about 0.5 parts by weight Or more, but less than about 1.5 parts by weight. When the content of the cured structural regulator satisfies the above range, a cured structure may be formed to simultaneously improve impact resistance and detachment force to a desired level, and when added in excess of the above range, elongation may be lowered.
The coating foam composition can significantly improve the impact resistance and the breaking force by satisfying the content of the curing agent and the curing structure regulator, compared to the styrene-butadiene-styrene (SBS) rubber at the same time as described above, respectively.
In another embodiment of the present invention, a coating foam of the coating foam composition is provided.
Specifically, the coated foam is a molded product obtained by processing the coating foam composition by coating foam, and has a thin film structure having a uniform thickness compared to a molded article produced by applying the coating foam composition to another foaming method such as extrusion foaming. It can be easily ensured, and excellent surface properties and durability can be implemented. In addition, it can exhibit improved impact resistance and grip force at the same time.
1 schematically shows a cross section of a
Referring to FIG. 1, the
In this case, the particle size of the bubble (A) may be about 30㎛ to about 40㎛. Since the particle diameter of the bubble (A) satisfies the above range, an appropriate density and surface roughness may be realized in consideration of the thickness of the coating foam. The particle diameter of the bubble can be derived by taking a cross section of the coated foam by SEM or TEM and measuring the diameter of the bubble in its projection.
2 schematically illustrates a cross section of a double-sided adhesive tape to which the coated
That is, the coated foam may be used as a substrate for double-sided adhesive tape. At this time, in detail, the double-sided adhesive tape is applied to general electronic products, and securing excellent punchability and impact resistance is an important factor. Since the coated foam is used as the base material of the double-sided adhesive tape, there is an advantage in that it is easy to secure punching resistance and impact resistance required.
The coating foam may have a thickness of about 100 μm to about 200 μm, for example, about 120 μm to about 180 μm. While the thickness of the coated foam satisfies the above range, the uniformity of the thickness can be excellent at the same time, and the desired density and roughness can be obtained.
In another embodiment of the present invention, a method for preparing the coated foam is provided. Specifically, the manufacturing method of the coated foam comprises the steps of preparing the coating foam composition; And coating foaming the composition for coating foaming.
As described above, the coating foam composition is uniform thickness through the coating foam method by including a foaming agent and a curing agent that satisfies the condition that the difference between the foaming maximum temperature of the foaming agent and the one-minute half-life temperature of the curing agent is about 15 ℃ or less Production of foam having a thin film structure may be possible.
In addition, the coating foam composition contains a multi-functional cross-linking agent or a hardening structure control agent containing inorganic nanoparticles, to realize excellent durability based on the appropriate gel content, and can simultaneously implement improved physical properties in terms of impact resistance and extraction force have.
The difference between the maximum foaming temperature of the blowing agent and the one-minute half-life temperature of the curing agent may be about 15 ° C. or less, for example, about 10 ° C. or less, for example, about 5 ° C. or less. More specifically, the maximum foaming temperature of the blowing agent and the one-minute half-life temperature of the curing agent may be the same. By adjusting the difference between the maximum foaming temperature of the blowing agent and the one-minute half-life temperature of the curing agent in the above-described range, the coating foam composition may be prepared as a coating foam having a thin film form having a uniform thickness, and the coating foam is excellent. Durability can be realized.
A coating foam using the composition for coating foam may be prepared by the method for preparing the coated foam, and the bubble structure and thickness uniformity of the coated foam may be appropriately controlled by the method for producing the coated foam.
Specifically, the manufacturing method of the coated foam includes the step of preparing a coating foam composition comprising the styrene-butadiene-styrene (SBS) rubber, foaming agent, curing agent and curing structure modifier. Matters regarding the coating foam composition and each component are as described above.
The preparing of the coating foam composition may be performed by first mixing the curing agent and the blowing agent and then mixing the styrene-butadiene-styrene (SBS) rubber. By mixing each component of the coating foam composition in this order, it may be advantageous to increase the dispersibility of the blowing agent compared to the case of mixing in a different order to control the density and thickness.
In addition, the curing structure modifier may be mixed with the styrene-butadiene-styrene (SBS) rubber, in the preferentially mixed curing agent and blowing agent.
In addition, the method for producing a coated foam includes the step of coating foaming the coating foam composition. In this step, the coating foam composition is carried out simultaneously with foaming and curing. The coating foam composition may be manufactured by coating foaming so that foaming and curing are performed simultaneously, and thus a coating foam having a uniform thickness may be manufactured, and a surface having a low roughness and desired density may be obtained.
Specifically, the coating foaming may be performed by coating the composition for coating foaming in a thin film shape at normal pressure, and then applying heat at a predetermined temperature. The method of applying heat to the coating foam composition is not particularly limited, but an oven may be used.
At this time, the step of coating foaming the coating foam composition is a condition that the foaming maximum temperature ± 15 ℃ of the blowing agent; And it can be carried out at a temperature that satisfies all of the conditions of 1 minute half-life temperature ± 15 ℃ of the curing agent.
Specifically, the 'foaming maximum temperature' of the blowing agent means the temperature when the blowing agent expands to the maximum size when heat is applied to the coating foam composition. In addition, the "one-minute half-life temperature" of the curing agent is a temperature at which the amount of the curing agent is 1/2 after one minute has elapsed after the heat is applied to the coating foam composition.
Specifically, heat is applied to the coating foam composition during the foaming of the coating, wherein the heating temperature satisfies both the foaming maximum temperature of the foaming agent ± 15 ℃ and the conditions of 1 minute half-life temperature ± 15 ℃ of the curing agent Can be. More specifically, the heating temperature may be ± 10 ° C difference from the one-minute half-life temperature of the curing agent, for example ± 5 ° C.
By the temperature conditions of the coating foam satisfies the conditions, it is possible to excellently form the bubble structure and thickness uniformity of the coated foam produced by the manufacturing method. For example, the coated foam prepared by the manufacturing method can be used as a substrate for double-sided adhesive tape as described above, in this case, it is possible to ensure a bubble structure to implement excellent durability, uniform thickness despite the thin Excellent degree can improve the structural properties of the double-sided adhesive tape.
The following presents specific embodiments of the present invention. However, the embodiments described below are merely for illustrating or explaining the present invention in detail, and thus the present invention is not limited thereto.
<
Example
And
Comparative example
>
Example One
With respect to 100 parts by weight of styrene-butadiene-styrene (SBS) rubber, 0.3 part by weight of a blowing agent (Akzonobel, Expancel DU) having a particle size of 10 μm before foaming and a maximum foaming temperature of 135 ° C., and a 1 minute half-life temperature of 130 ° C. A coating foam composition was prepared by mixing 5 parts by weight of a dibenzoyl peroxide-based curing agent (ACROS, Dibenzoyl Peroxide), 1 part by weight of a polythiol compound having four thiol groups, and 0.5 part by weight of carbon black. At this time, the blowing agent and the curing agent were mixed first, and then the styrene-butadiene-styrene (SBS) rubber and the polythiol compound were mixed. The coating foam composition was coated on a release polyethylene terephthalate (PET), and heated in an oven at 130 ° C. for 3 minutes to prepare a coated foam having a thickness of 150 μm.
Example 2
Instead of the polythiol compound, based on 100 parts by weight of styrene-butadiene-styrene (SBS) rubber, the inorganic nanoparticles having a particle size of 100 nm and a layered silicate prepared from aluminum oxide and silica (SiO 2 ) were 0.5. Except for mixing by weight, the coating foam of the same thickness was prepared in the same manner as in Example 1.
Comparative example One
With respect to 100 parts by weight of styrene-butadiene-styrene (SBS) rubber, Example 1 except that 5 parts by weight of a differential butyl peroxide-based curing agent (Aldrich, Luperox? I) having a 1-minute half-life temperature of 193 ℃ In the same manner, coated foams of the same thickness were prepared.
Comparative example 2
A coating foam having the same thickness was prepared in the same manner as in Example 1, except that the polythiol compound was not included at all.
For each of the coating foam compositions of the Examples and Comparative Examples, the characteristics of each component are shown in Table 1 below.
<Evaluation>
Experimental Example 1: Determination of gel content
For each of the coated foams of Examples and Comparative Examples, the initial weight Wi was measured for the specimens obtained by cutting them to a certain size. Subsequently, the specimen was immersed in a toluene solvent and left for 24 hours, and then filtered using a mesh of known weight (Wm), dried in an oven at 110 ° C. for 2 hours, and then weighed (Wf). It was. Then, the gel content was derived by the following formula 1, the results are shown in Table 2 below.
[Equation 1]
Gel content (%) = {(Wf-Wm) / Wi} ⅹ 100
Experimental Example 2: evaluation of impact resistance
For each of the coated foams of Examples and Comparative Examples, a 50 μm thick acrylic adhesive layer was formed on both sides to prepare a double-sided adhesive tape. Subsequently, each of the double-sided adhesive tapes was made into a specimen of 0.7 mm × 20 mm × 4EA, and the specimen was attached between the polycarbonate (PC) substrate and the glass substrate. Next, the weight of 100 g was dropped by the Dupont type test method, and the weight and height when the double-sided adhesive tape was separated from the substrates were measured. The impact energy (mJ) was calculated using the weight and height, and the results are shown in Table 2 below.
Experimental Example 3: Holding power evaluation
For each of the coated foams of Examples and Comparative Examples, a 50 μm thick acrylic adhesive layer was formed on both sides to prepare a double-sided adhesive tape. Subsequently, each of the double-sided adhesive tapes was made into a specimen of 0.7 mm × 20 mm × 4EA, and the specimen was attached between the polycarbonate (PC) substrate and the glass substrate. Then, the lifting force (kgf) until peeled on the specimen and the glass substrate surface at a peel rate of 20 mm / min was measured, the results are shown in Table 2 below.
Experimental Example 4: evaluation of durability
Experimental Example 3 after applying artificial sebum to the surface for evaluating the ability to extract, using the thermo-hygrostat device under a temperature of about 85 ℃ and a relative humidity of about 85% of Experimental Example 3 Evaluation was carried out in the same manner as. The results are as described in Table 2 below.
Referring to the results of Table 1 and Table 2, the coating foam prepared from the coating foam composition according to an embodiment of the present invention satisfies a gel content of about 60% to about 70%, and also, about 290mJ or more For example, it exhibits an impact energy of about 290 mJ to about 320 mJ and a holding force of about 3.5 kgf or more, for example, about 3.5 kgf to about 4.0 kgf, which has the advantage of simultaneously implementing improved impact resistance and durability. have. Furthermore, even after being left for a long time in a high temperature and high humidity environment, it can be seen that excellent durability and reliability are achieved through exhibiting a force of about 0.05kgf or more, for example, about 0.05kgf to about 1.0kgf.
100: coated foam
10: adhesive layer
A: Bubble
Claims (18)
The curing structural modifier includes a multifunctional crosslinking agent or inorganic nanoparticles,
The difference between the foaming maximum temperature of the blowing agent and the one-minute half-life temperature of the curing agent is 5 ° C. or less.
Coating foam composition.
The styrene-butadiene-styrene (SBS) rubber has a styrene-derived structural unit content of 20% to 35% by weight.
Coating foam composition.
The particle diameter of the blowing agent is 10㎛ to 16㎛
Coating foam composition.
The blowing agent has a core-shell structure,
The core of the blowing agent comprises one selected from the group consisting of nitrogen (N 2 ) gas, hydrocarbon gas, hydrogen (H 2 ) gas, and combinations thereof,
The shell of the blowing agent comprises a thermoplastic resin
Coating foam composition.
The curing agent includes one selected from the group consisting of a dibenzoyl peroxide-based curing agent, a dietary butyl peroxide-based curing agent, a lauryl peroxide-based curing agent and combinations thereof
Coating foam composition.
1 to 10 parts by weight of the curing agent, based on 100 parts by weight of the styrene-butadiene-styrene (SBS) rubber
Coating foam composition.
100 parts by weight of the styrene-butadiene-styrene (SBS) rubber, including 0.1 to 1 part by weight of the blowing agent
Coating foam composition.
The multifunctional crosslinking agent comprises one selected from the group consisting of polythiol compounds, polyacrylate compounds, and combinations thereof
Coating foam composition.
The polythiol compound is a tri- to 5-functional polythiol compound
Coating foam composition.
The polyacrylate compound is a tri- to six-functional polyacrylate compound
Coating foam composition.
The inorganic nanoparticles have a particle size of 1 nm to 10 μm.
Coating foam composition.
The inorganic nanoparticles are made of silicate of a layered structure (silicate)
Coating foam composition.
To about 100 parts by weight of the styrene-butadiene-styrene (SBS) rubber, the hardening structure modifier comprises 0.5 parts by weight or more, less than 2 parts by weight
Coating foam composition.
The coated foam comprises air bubbles,
The particle diameter of the bubble is 30㎛ to 40㎛
Coated foam.
Used as base material for double-sided adhesive tape
Coated foam.
Comprising coating foaming the coating foam composition;
Method of Making Coated Foam.
Coating foaming the coating foam composition,
The foaming maximum temperature of the blowing agent ± 5 ℃; And 1 minute half-life temperature of the curing agent is performed at a temperature that satisfies all the conditions of ± 5 ℃
Method of Making Coated Foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160033455A KR102012666B1 (en) | 2016-03-21 | 2016-03-21 | The composition for coating foam, the coating foam and the preparation method of the coating foam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160033455A KR102012666B1 (en) | 2016-03-21 | 2016-03-21 | The composition for coating foam, the coating foam and the preparation method of the coating foam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20170109729A KR20170109729A (en) | 2017-10-10 |
| KR102012666B1 true KR102012666B1 (en) | 2019-08-22 |
Family
ID=60190186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020160033455A KR102012666B1 (en) | 2016-03-21 | 2016-03-21 | The composition for coating foam, the coating foam and the preparation method of the coating foam |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR102012666B1 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100834822B1 (en) * | 2001-01-08 | 2008-06-09 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Foam including surface-modified nanoparticles |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120178838A1 (en) * | 2010-10-07 | 2012-07-12 | Lanxess Elastomers B.V. | Foamable rubber composition |
-
2016
- 2016-03-21 KR KR1020160033455A patent/KR102012666B1/en active IP Right Grant
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100834822B1 (en) * | 2001-01-08 | 2008-06-09 | 쓰리엠 이노베이티브 프로퍼티즈 캄파니 | Foam including surface-modified nanoparticles |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20170109729A (en) | 2017-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI600734B (en) | Adhesive compositions and their application Coverlay Film and Flexible Copper Clad Laminate | |
| JP2017203117A (en) | Structural adhesive film, metal member assembly, and method for manufacturing the same | |
| CN103865468A (en) | Adhesive composition, adhesive varnish, adhesive film and wiring film | |
| JP2017203114A (en) | Adhesive, metal member assembly, and method of manufacturing metal member assembly | |
| KR20200011903A (en) | Adhesive composition | |
| WO2011129213A1 (en) | Cured multilayer sheet production method and cured multilayer sheet | |
| TWI667325B (en) | Tape-shaped pressure-sensitive adhesive foamed with micro-balloons and its manufacturing method and use | |
| KR102012666B1 (en) | The composition for coating foam, the coating foam and the preparation method of the coating foam | |
| KR102230945B1 (en) | Adhesive composition | |
| DE102020209289A1 (en) | Diecut especially for permanent sealing of holes | |
| KR102118483B1 (en) | The composition for coating foam, the coating foam and the preparation method of the coating foam | |
| JP2020193256A (en) | Curable resin composition, resin cured product, laminated film, transfer film, and laminate | |
| KR102168746B1 (en) | Foam film, method for manufacturing the same and foam adhesive tape comprising the same | |
| KR102092951B1 (en) | Substrate film for double-sided adhesive tape and the preparing method for the same | |
| JP6260734B1 (en) | Electronic component protection sheet | |
| KR102183705B1 (en) | Adhesive composition | |
| WO2020022801A1 (en) | Adhesive composition | |
| JP2018170492A (en) | Electronic part protection sheet | |
| KR102183704B1 (en) | Adhesive composition | |
| WO2020022799A1 (en) | Adhesive composition | |
| JP2020082439A (en) | Substrate with resin cured layer, decorative sheet, vehicular window, and method for manufacturing substrate with resin cured layer | |
| KR102481466B1 (en) | Thermal curable adhesive composition, composite structure having adhesive layer and its preparation method | |
| KR102481467B1 (en) | Thermal curable adhesive composition, composite structure having adhesive layer and its preparation method | |
| KR102230944B1 (en) | Adhesive composition | |
| JPS5947282A (en) | Film adhesive |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| N231 | Notification of change of applicant | ||
| A201 | Request for examination | ||
| E902 | Notification of reason for refusal | ||
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant |