KR20130053241A - A sealant composition for repairing tire with improved coating property - Google Patents

Abstract

PURPOSE: A sealant composition is provided to obtain storage stability, spreadability, and adhesive performance by preventing inlet-logging problems. CONSTITUTION: A sealant composition comprises 35-75 weight% of styrene-butadiene rubber latex, 100 weight% or less of natural rubber latex, 0.1-30 weight% of emulsion type tackifier resin or acryl emulsion, 10-50 weight% of anti-freezing agent, and 0.1-20 weight% of coating-forming preventer. The styrene-butadiene rubber latex contains 30-75 weight% of solid phase, and is concentrated or diluted. The emulsion type tackifier resin comprises one or more selected from a modified terpene resin, a rosin ester resin, a terpene resin, and a rosin resin.

Description

A sealant composition for repairing tire with improved coating property

TECHNICAL FIELD The present invention relates to a tire repair sealant composition excellent in applicability, wherein styrene-butadiene rubber latex is used as a base polymer, and natural rubber latex can be used in combination. Consisting of a composition containing a tackifying resin or an acrylic emulsion, a lyophilizer and an anti-film forming agent, it is particularly easy to use due to excellent coating properties and no clogging of the inlet port, and has excellent sealing properties as well as excellent adhesion properties and low temperature stability. A sealant composition useful for tire repair.

Safety is very important in the car because the safety of tires is directly related to the lives of drivers and passengers. Generally, the puncture of a tire is reported to be only one puncture at about 70,000km or about 6 to 7 years, but it may occur at any time according to an external environment such as an accident, road condition, and aging.

When such a situation occurs, the importance of the automotive puncture emergency repair sealant that is urgently to seal the puncture of the tire is very important.

The base polymer used as a flat sealant in automobiles is a natural rubber latex (NR latex) that exhibits excellent sealing and physical properties. Natural rubber latex varies in price depending on the country of origin and the year of the year, and the characteristic difference according to the type is so large that some kinds of natural rubber latex used as tire puncture sealant for automobiles are used.

Particularly, in the tire repair sealant related fields, natural rubber latex without protein is mainly preferred due to problems such as film formation due to ammonia cord corrosion and protein corruption and clogging of the injection port of the sealant injection device. There is a problem that can not be easily commercialized because it is expensive.

Korean Patent Publication No. 2010-41368 discloses 20 to 60 parts by weight of a sealant, 20 to 40 parts by weight of a cryoprotectant, 0.5 to 8 parts by weight of an adhesive, 10 to 30 parts by weight of solids and 2 to 10 parts by weight of deionized water. , The sealant comprises an aqueous latex, the cryoprotectant comprises at least one selected from the group consisting of propylene glycol, diethylene glycol and butylene glycol, the pressure-sensitive adhesive comprises ethylene vinyl acetate A sealant composition for automobile tires is proposed, wherein the solid content comprises at least one selected from the group consisting of calcium carbonate, bentonite, potassium feldspar and sodium feldspar.

However, such a sealant composition is poor in coating property and does not solve problems such as clogging of the injection hole when applied to the film formation and the sealant injection device.

On the other hand, styrene-butadiene rubber latex (SBR latex) is a low-cost synthetic latex, and has been mainly used in pressure-sensitive adhesives, etc., the use of the tire puncture repair composition, such as car tires, such as coating properties and wettability is very limited use.

In addition, since the tire tire puncture repair composition has been used an emulsion type tackifier for the purpose of improving adhesion to the tire, the tackifier uses an aromatic modified terpene resin emulsion, but the composition is expensive compared to latex It increases the unit cost of, and has excellent compatibility with natural latex but low compatibility with styrene-butadiene rubber, so that there are fine particles when mixed.

Therefore, in order to manufacture a tire repair composition mainly comprising styrene-butadiene rubber latex, it is urgent to secure applicability to tires and compatibility with a tackifying resin as in the case of using natural rubber latex.

However, in the tire repair sealant composition using styrene-butadiene rubber latex, a product that has been properly secured with such an applicability and a tackifying resin has not been developed yet.

In order to solve the above problem, the present invention has been completed by the fact that the use of styrene-butadiene rubber latex and tackifying resin improves the compatibility between the coating properties and the composition by the specific composition.

Therefore, the present invention uses a styrene-butadiene rubber latex as the main rubber component, can be used in combination with natural rubber, and a new concept of tire repair sealant that improves applicability by imparting adhesive force by using acrylic resin as a tackifying resin. It is an object to provide a composition.

The present invention for solving the above problems,

a) 35% to 75% by weight of styrene-butadiene rubber latex,

b) less than 100% by weight of natural rubber latex,

c) 0.1% to 30% by weight of emulsion type tackifying resin or acrylic emulsion,

d) 10% to 50% by weight of cryoprotectant,

e) 0.1 wt% to 20 wt% of anti-film forming agent

It provides a tire puncture emergency repair sealant composition comprising a.

In addition, the present invention includes mixing the natural rubber latex in addition to the sealant composition as described above in a weight ratio of 0.5 to 5 times the styrene-butadiene rubber latex.

When the tire puncture is repaired using the sealant composition according to the present invention, since the styrene-butadiene rubber latex is a base polymer, it is possible to prevent corruption due to protein components, thereby preventing problems such as clogging of the inlet, thereby ensuring storage stability. It is effective in coating property.

In addition, since styrene-butadiene rubber latex can be manufactured synthetically, stable dissemination is possible, and it is advantageous in terms of price as compared to natural rubber latex, and acrylic emulsion is used as a tackifying resin, thereby reducing the production cost of tire puncture repair composition. There is a very economical effect that can be significantly lowered.

Hereinafter, the present invention will be described in detail.

The present invention relates to a tire repair sealant composition having improved applicability by constituting styrene-butadiene rubber latex, an emulsion-type tackifying resin or an acrylic emulsion, an antifreezing agent, and an anti-film forming agent as main components.

In the present invention, the styrene-butadiene rubber latex used as the base polymer of the sealant composition is preferably a solid content of 30 to 75% by weight, preferably 35 to 55% by weight. Such styrene-butadiene rubber latex may be used diluted or concentrated. The styrene-butadiene rubber latex is a synthetic material, which is advantageous in price compared to natural rubber latex, and does not contain protein components, so there is no problem such as clogging of the inlet port due to rot even when stored for a long time, and there is an advantage that stable supply and demand are possible. . However, since it is not applicable to the present technology because it is not compatible with the coating property and the tackifying resin, the present invention is characterized by the newly developed series of compositions to improve the applicability of styrene-butadiene rubber latex through multiple experiments. There is this. This will be understood in the following description.

In addition, according to the present invention, even if only the styrene-butadiene rubber latex is used as the base polymer through a series of compositions, the properties of the composition can be exhibited, but in order to further improve compatibility and applicability, an additional solid content of the latex component is 50 to 70 weight. % Natural rubber latex may be used in combination with the styrene-butadiene rubber latex at a weight ratio of 0.5 to 5 times.

Styrene-butadiene rubber latex according to the present invention is preferably used in 35 to 75% by weight of the total composition, more preferably 50 to 60% by weight. If the content of styrene-butadiene rubber latex is less than 35% by weight, the sealing effect of the composition is significantly reduced, and if it exceeds 75% by weight, the low temperature stability of the composition cannot be guaranteed. In addition, when using too much natural rubber latex or when the content of the latex is increased as a whole there is a problem that the low temperature stability of the composition is lowered.

In the present invention, a tackifying resin or an acrylic emulsion is used, and the tackifying resin is preferably used in the form of an emulsion to be mixed with natural rubber latex. In general, aromatic modified terpene resin emulsions may be used as the tackifying resin, and in the present invention, all of the emulsion type tackifying resins such as rosin resins, rosin ester resins, terpene resins, and terpene phenol resins may be used.

The acrylic emulsion that can be used in the present invention preferably has a Tg region of -80 ° C to 0 ° C, and more preferably a Tg area of -60 ° C to -10 ° C. If Tg is less than −80 ° C., the cohesion of the composition is too low to be difficult to use, and if Tg is higher than 0 ° C., low temperature stability cannot be expected. Such acrylic emulsions can be used synthetically and conventionally produced and marketed products.

The acrylic emulsion used in the present invention may be synthesized by a general method of emulsion polymerization, for example, a vinyl monomer having a crosslinkable functional group, including an acrylic acid ester monomer having an alkyl group of 1 to 12 carbon atoms, crosslinkable Acrylic monomers, itaconic acid, maleic acid or maleic anhydride monomers having functional groups can be optionally used. The acrylic acid ester monomer is preferably an alkyl ester monomer having 1 to 12 carbon atoms, more preferably an alkyl ester monomer having 2 to 8 carbon atoms, in order to maintain the cohesion force since the cohesive force of the pressure-sensitive adhesive is lowered when the alkyl group has a long chain form. . Specifically, the acrylic ester monomer having an alkyl group having 1 to 12 carbon atoms includes alkyl acrylate esters such as methyl acrylate, ethyl acrylate, butyl acrylate, propyl acrylate, 2-ethylhexyl acrylate and butyl methacrylate, 2 Ethylhexyl methacrylate, ethyl methacrylate, methyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, t-butyl methacrylate, pentyl methacrylate, n-octyl methacrylate, iso It can be used individually or in mixture of 2 or more types selected from acrylic esters, such as octyl methacrylate, isononyl methacrylate, 2-ethylbutyl methacrylate, or benzyl acrylate.

The acrylic monomer having the crosslinkable functional group may be selectively used for the purpose of enhancing cohesion of the acrylic emulsion. If the cohesive force of the acrylic emulsion is sufficient, the following crosslinkable acrylic monomer may not be used.

The vinyl monomer having a crosslinkable functional group or the acrylic monomer having a crosslinkable functional group may be 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethylene glycol methacrylate, or 2-hydroxy. Monomers containing hydroxyl groups, such as propylene glycol methacrylate, acrylic acid, and methacrylic acid can be included, and these monomers and monomers, such as itaconic acid, maleic acid, or maleic anhydride, can be used individually or in mixture of 2 or more types. .

In the present invention, the tackifying resin or the acrylic emulsion is used in 0.1% to 30% by weight of the total composition, preferably 10% to 15% by weight. When the content of the tackifying resin or the acrylic emulsion is less than 0.1% by weight, there is no effect of imparting adhesive force. When the content of the tackifying resin or acrylic emulsion exceeds 30% by weight, the viscosity of the composition is increased and the sealing property is decreased, and the compatibility between the composition and the tackifying resin is drastically reduced.

The cryoprotectant used in the present invention may be used alone or in combination of ethylene glycol, propylene glycol and diethylene glycol as a glycol-based liquid phase generally used.

The cryoprotectant may contain up to 10% to 50% by weight of the total composition, preferably 20% to 40% by weight is used. If the amount of the cryoprotectant is less than 10% by weight, there is no freeze protection effect at low temperatures, and if the amount exceeds 50% by weight, the adhesion strength is sharply reduced and there is a problem that the sealing effect is also lacking.

On the other hand, in the present invention, a film forming inhibitor is used, and the film forming inhibitor is preferably composed of i) a drying inhibitor and ii) a surfactant. In this case, the drying inhibitor is generally used in paints and paints, and glycol is used. Propylene glycol, which may be used as the cryoprotectant, may also be used. However, according to the present invention, high molecular weight glycols such as polyethylene glycol and polypropylene glycol may be preferably used as the drying inhibitor in order to impart storage stability and anti-film formation properties. In the composition of the present invention, since the high molecular weight glycol is not easily present in the aqueous solution as a drying inhibitor component used for the anti-film forming agent, it is more preferable to increase the compatibility with the composition using the above surfactant. The high molecular weight glycol may use a weight average molecular weight of 200 to 8000, preferably 200 to 1000. When the high molecular weight glycol molecular weight is less than 200, it is difficult to expect an anti-film formation effect, when the molecular weight exceeds 8000 there is a problem that the viscosity of the composition rises rapidly. In addition, a nonionic, anionic or cationic surfactant may be used as a surfactant. Specific examples of the nonionic surfactant include polyethylene nonylphenyl ether, polyoxyethylene octylphenyl ether, polyoxyethylene glycol, and polyoxy. Ethylene glycol methyl ether, polyoxyethylene monoaryl ether, polyoxyethylene bisphenol-A ether, polyoxyethylene neopentyl ether, polyoxyethylene lauryl ether, polyoxyethylene oleyl ether, polyoxyethylene tridecyl ether, poly Oxyethylene octyl ether, polyoxyethylene octyl phenyl ether, polyoxyethylene lauryl ester, polyoxyethylene stearyl ester, polyoxyethylene oleyl ester, polyoxyethylene sorbitan fat ester, polyoxyethylene laurylamine, polyoxy Ethylene stearylamine, polyoxyethylene oleyl amine and the like Sodium dodecyl benzene sulfonate, ammonium dodecyl benzene sulfonate, sodium alkyl disulfate, sodium alkyl diphenyl ether disulfonate, sodium polyoxyethylene alkyl sulfate, ammonium polyoxyethylene alkyl as anionic surfactant Sulfate, sodium dioctyl sulfosuccinate, polyoxyethylene aryl ether phosphate, allyl phosphate mixtures, and the like, and cationic surfactants include fethiamine acetate, oleyl imidazolinium methosulfate, petti ammonium sulfate, tallow Imidium methosulfate, oleyl imidium, oleyl imidium methoselate, methyl triethanol ammonium methyl sulfate dialkyl ester, and the like.

The surfactant may be used in an amount of 0.1 wt% to 60 wt% in the film forming inhibitor, and preferably 10 wt% to 40 wt%. If the amount of the surfactant in the film-forming agent is less than 0.1% by weight, the high molecular weight glycol is not easily mixed with the other mixed components, and if it exceeds 60% by weight, the adhesive force is sharply lowered, which is undesirable.

The anti-film forming agent is used 0.1% to 20% by weight of the total composition, preferably 2% to 10% by weight. If the anti-film formation agent is less than 0.1% by weight, there is no anti-film formation effect, and if it exceeds 20% by weight, there is a problem in that the adhesion decreases.

In addition to the above components, additives such as anti-aging agents and leveling agents may optionally be added to the sealant composition according to the present invention in an amount of 0.1 wt% to 10 wt% in the whole composition.

Since the sealant composition according to the present invention has a styrene-butadiene rubber latex as the base polymer, it is possible to prevent decay due to protein components, thereby preventing storage problems such as clogging of the inlet, thereby ensuring storage stability, and obtaining styrene-butadiene rubber. Since latex is stable and can be supplied in a favorable price compared to natural rubber latex, and the use of acrylic emulsion or tackifying resin in emulsion form, the production cost of tire repair sealant composition can be drastically lowered.

In addition, the sealant composition of the present invention, as described above, by combining a series of components as appropriate, excellent physical properties such as adhesive strength, low temperature stability and coating properties, but also good storage stability and ease of use during long-term use, convenient in emergency situations The tire puncture can be easily repaired.

Hereinafter, the present invention will be described in detail by way of examples, in order to enable those skilled in the art to better understand the application method of the present invention, the preparation examples, examples and comparative examples are shown in the form of description, and the present invention is practiced. It is not limited by the example.

Preparation Examples 1 to 4: Preparation of the film forming inhibitor

[MS-1 manufacturing]

20 g of sodium dodecylbenzenesulfonate (50% by weight) was added to 90 g of polyethylene glycol having a weight average molecular weight of 200, and sufficiently stirred to prepare an anti-film forming agent having a concentration of 10% by weight of sodium dodecylbenzenesulfonate.

[MS-2 manufacture]

Using polypropylene glycol having a weight average molecular weight of 400, an anti-film forming agent having a concentration of 10% by weight of sodium dodecylbenzenesulfonate was prepared in the same manner as in MS-1.

MS-3 manufacturing

40 g of sodium dodecylbenzenesulfonate (50% by weight) was added to 80 g of polyethylene glycol having a weight average molecular weight of 400, and sufficiently stirred to prepare an anti-film forming agent having a concentration of 20% by weight of sodium dodecylbenzenesulfonate.

[MS-4 manufacturing]

A polypropylene glycol having a weight average molecular weight of 1000 was used to prepare an anti-film forming agent having a concentration of 20% by weight of sodium dodecylbenzenesulfonate in the same manner as in MS-1.

Preparation Examples 5-7 Synthesis of Acrylic Emulsion

The acrylic emulsion is synthesized using a common acrylic emulsion emulsion polymerization method, and Tg is controlled by fox. eq. is used to determine the content of each acrylic monomer. Emulsifier and initiator concentration and solid content were the same so that there was no difference in conditions other than Tg.

[AC-1 manufacturing]

The content of 1-ethylhexyl acrylate, butyl acrylate, and methyl methacrylate monomer was properly adjusted to synthesize an acrylic emulsion having a Tg of -40 ° C and a solid content of 60% by weight.

[AC-2 production]

The content of 1-ethylhexyl acrylate, butyl acrylate, and methyl methacrylate monomer was properly adjusted to synthesize an acrylic emulsion having a Tg of -20 ° C and a solid content of 60% by weight.

[AC-3 manufacturing]

The content of 1-ethylhexyl acrylate, butyl acrylate, and methyl methacrylate monomer was properly adjusted to synthesize an acrylic emulsion having a Tg of 10 ° C. and a solid content of 60% by weight.

Example 1

84.5 g of ethylene glycol and 22.1 g of MS-1 prepared above were added thereto, followed by strong mixing for 10 minutes. 26.3 g of the acrylic emulsion AC-1 prepared above was added to 278.8 g of styrene-butadiene rubber latex, vigorously mixed for 10 minutes, added to the prepared ethylene glycol / MS solution, and stirred at room temperature for 1 hour to prepare a sealant composition for tire repair. It was.

Example 2

Sealant composition for tire repair was prepared in the same manner as in Example 1 using AC-2 as the acrylic emulsion.

Example 3

The sealant composition for tire repair was manufactured by the same method as Example 1 using MS-2 as an anti-film formation agent.

Example 4

The sealant composition for tire repair was manufactured by the same method as Example 1 and Example 3 using 3g of MS-2 as an anti-film formation agent.

Example 5

A sealant composition for tire repair was prepared in the same manner as in Example 1 using 111.5 g of styrene-butadiene rubber latex and 167.3 g of natural rubber latex.

Example 6

A sealant composition for tire repair was prepared in the same manner as in Example 1 using an acrylic emulsion (Tg-40 ° C.) currently produced and sold.

Example 7

125.8 g of ethylene glycol and 86.8 g of tackifying resin were added and 5.8 g of S-1 prepared above was mixed vigorously for 10 minutes. 379.4 g of styrene-butadiene rubber latex was added and stirred at room temperature for 1 hour to prepare a sealant composition for tire repair.

Example 8

The sealant composition for tire repair was manufactured by the same method as Example 1 using the anti-film formation agent of MS-2.

Example 9

121.6 g of ethylene glycol and 86.8 g of a tackifying resin were mixed with vigorous 10 minutes after addition of 3.5 g of MS-1 prepared above. 227.6 g of styrene-butadiene rubber latex and 151.7 g of a natural rubber latex were added thereto, and stirred at room temperature for 1 hour to prepare a sealant composition for tire repair.

Example 10

A sealant composition for tire repair was prepared in the same manner as in Example 3 using 75.9 g of styrene-butadiene rubber latex and 303.5 g of natural rubber latex.

Comparative Example 1

278.8 g of styrene-butadiene rubber latex and 26.3 g of acrylic emulsion AC-1 prepared above were added to 84.5 g of ethylene glycol, and the mixed composition was stirred at room temperature for 1 hour to prepare a sealant composition for tire repair. .

Comparative Example 2

84.5 g of ethylene glycol and 22.1 g of MS-1 prepared above were added thereto, followed by strong mixing for 10 minutes. 26.3 g of the acrylic emulsion AC-3 prepared above was added to 278.8 g of styrene-butadiene rubber latex, vigorously mixed for 10 minutes, added to the prepared ethylene glycol / MS-1 mixed solution, and stirred at room temperature for 1 hour to seal the tire for sealant The composition was prepared.

Comparative Example 3

84.5 g of ethylene glycol and 26.3 g of an emulsion-type terpene phenol tackifying resin were added thereto, followed by vigorous mixing for 10 minutes, and after the addition of 278.8 g of natural rubber latex, the mixture was stirred at room temperature for 1 hour to prepare a sealant composition for tire repair.

Comparative Example 4

121.6 g of ethylene glycol and 86.8 g of tackifying resin were mixed with vigorous stirring for 10 minutes. 379.4 g of natural rubber latex was added and stirred at room temperature for 1 hour to prepare a sealant composition for tire repair.

Comparative Example 5

121.6 g of ethylene glycol, 86.8 g of tackifying resin, and 3.5 g of S-1 were mixed with vigorous stirring for 10 minutes. 379.4 g of natural rubber latex was added and stirred at room temperature for 1 hour to prepare a sealant composition for tire repair.

Experimental Example

In order to compare the physical properties of the sealant compositions prepared in Examples and Comparative Examples, the physical properties of each composition were compared by the following physical property evaluation method and are shown in Table 1 below. The amount of each component in the following Table 1 and Table 2 is based on parts by weight.

[Viscosity]

The compositions of Examples and Comparative Examples were left at 25 ° C. for at least 5 hours by the test method of KSM-3708, and then Brookfield viscometers (Brookfield, DV-I +) were used, and evaluated at a rotation speed of 100 rpm using a No. 63 spindle. It was.

[adhesiveness]

After coating the compositions of Examples and Comparative Examples to PET film and dried at 70 ℃ for 2 hours to prepare a coating film having a thickness of 110 ㎛ over 1 hour after aging and by the evaluation method of ASTM D 6195 micro UTM (Stable Micro System, TA- XT, Plus) adhesive surface is 25mmX25mm and evaluated at a displacement speed of 5mm / sec.

[Low temperature stability]

The compositions of Examples and Comparative Examples were placed in a cryostat (Ueshim, Model 890454) capable of maintaining -30 ° C and left for 72 hours to evaluate the freezing state of the surface and the composition as a whole.

[Rubber plate coating property]

The comparative examples and the example composition were applied to a rubber sheet made of the same material as the tire rubber so that the thickness of the wet state was 300 μm, and then the shrinkage and wettability of the edge and the middle part were visually evaluated.

[With or without particles in the composition]

After the composition of the above Examples and Comparative Examples were applied to the PET film and the glass plate thinly, the presence of fine particles in the coating film was observed and evaluated.

[Checking film formation]

After coating the composition on a glass plate, the film was observed for at least one week to evaluate that a film on the surface was formed.

Example-1 Example-2 Example-3 Example-4 Example 5 Example-6 Comparative Example 1 Comparative Example 2 Comparative Example 3 SBR latex 278.8 278.8 278.8 278.8 111.5 278.8 278.8 278.8 - NR latex - - - - 167.3 - - - 278.8 Ethylene glycol 84.5 84.5 84.5 84.5 84.5 84.5 84.5 84.5 84.5 MS-1 22.1 22.1 - - - 22.1 - 22.1 - MS-2 - - 22.1 33.5 22.1 - - - - AC-1 26.3 - 26.3 26.3 26.3 - 26.3 - - AC-2 - 26.3 - - - - - - - AC-3 - - - - - - - 26.3 - AC-4 - - - - - 26.3 - - - Terpene phenol - - - - - - - 26.3 Viscosity (cps) 34.6 35.2 30.7 36.1 36.9 41.6 33.5 32.4 43.2 Cohesion (g) 72.6 83.1 70.5 62.3 73.6 77.5 82.1 67.4 35.3 Low Temperature Stability (-30 ℃) frost
none frost
none frost
none frost
none frost
none frost
none frost
none frost frost
none Particles in the Composition none none none none none none Particulate Generation none Particulate Generation Rubber sheet applicability Good Good Good Good Good Good Bad Good Good Film formation X X X X X X O X O

Example-1 Example-2 Example-3 Example-4 Example 5 Example-6 Comparative Example 1 Comparative Example 2 Comparative Example 3 SBR latex 278.8 278.8 278.8 278.8 111.5 278.8 278.8 278.8 - NR latex - - - - 167.3 - - - 278.8 Ethylene glycol 84.5 84.5 84.5 84.5 84.5 84.5 84.5 84.5 84.5 MS-1 22.1 22.1 - - - 22.1 - 22.1 - MS-2 - - 22.1 33.5 22.1 - - - - AC-1 26.3 - 26.3 26.3 26.3 - 26.3 - - AC-2 - 26.3 - - - - - - - AC-3 - - - - - - - 26.3 - AC-4 - - - - - 26.3 - - - Terpene phenol - - - - - - - 26.3 Viscosity (cps) 34.6 35.2 30.7 36.1 36.9 41.6 33.5 32.4 43.2 Cohesion (g) 72.6 83.1 70.5 62.3 73.6 77.5 82.1 67.4 35.3 Low Temperature Stability (-30 ℃) frost
none frost
none frost
none frost
none frost
none frost
none frost
none frost frost
none Particles in the Composition none none none none none none Particulate Generation none Particulate Generation Rubber sheet applicability Good Good Good Good Good Good Bad Good Good Film formation X X X X X X O X O

-SBR latex (Kumho Petrochemical, KSL 243A)

NR latex (UNIMAX RUBER, Selatex 3821)

-Ethylene glycol (Samjeon)

MS (Anti-Skin Agent, Manufacturer)

AC-1, AC-2, AC-3 (acrylic emulsion, manufactured AC-1; Tg-40 ° C, AC-2; Tg-20 ° C, AC-3: Tg 10 ° C)

-AC-4 (Acrylic emulsion, Daewon polymerizer & Daewon chemical, DA-1062)

Terpene phenol (E-100, ARAKAWA CHEMICAL)

Claims (11)

a) 35% to 75% by weight of styrene-butadiene rubber latex,
b) less than 100% by weight of natural rubber latex,
c) 0.1% to 30% by weight of emulsion type tackifying resin or acrylic emulsion,
d) 10% to 50% by weight of cryoprotectant,
e) 0.1 wt% to 20 wt% of anti-film forming agent
Tire puncture emergency repair sealant composition comprising a. The sealant composition of claim 1, wherein the styrene-butadiene rubber latex has a solid content of 30 wt% to 75 wt% and is concentrated or diluted. The sealant composition of claim 1, wherein the emulsion-type tackifying resin comprises any one or more selected from aromatic-modified terpene resins, rosin ester resins, terpene resins, and rosin resins. The method of claim 1, wherein the acrylic emulsion comprises an acrylic ester monomer having an alkyl group having 1 to 12 carbon atoms, selected from a vinyl monomer having a crosslinkable functional group, an acrylic monomer having a crosslinkable functional group, itaconic acid, maleic acid or maleic anhydride monomer. Sealant composition comprising the.
The method of claim 4, wherein the acrylic emulsion is alkyl acrylate ester such as methyl acrylate, ethyl acrylate, butyl acrylate, propyl acrylate, 2-ethylhexyl acrylate and butyl methacrylate, 2-ethylhexyl methacrylate, ethyl Methacrylate, methyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, t-butyl methacrylate, pentyl methacrylate, n-octyl methacrylate, isooctyl methacrylate, isononyl meth Sealant composition, characterized in that the acrylic ester monomer selected from acrylate, 2-ethylbutyl methacrylate, and benzyl acrylate.
The acrylic monomer according to claim 4, wherein the acrylic monomer having a crosslinkable functional group is 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxyethylene glycol methacrylate or 2-hydroxypropylene glycol methacrylate. Monomer containing a hydroxyl group selected from; Or acrylic acid, methacrylic acid, acrylic acid duplex or monomers selected from these and itaconic acid, maleic acid or maleic anhydride.
The sealant composition of claim 1, wherein the acrylic emulsion has a Tg region of -80 ° C to 0 ° C. The sealant composition according to claim 1, wherein the anti-film forming agent is a mixture of a high molecular weight glycol having a weight average molecular weight of 200 to 8000 and a cationic, anionic or nonionic surfactant.
The sealant composition according to claim 8, wherein the surfactant is contained in an amount of 0.1 wt% to 60 wt% in the anti-film forming agent.
The sealant composition of any one of the sealant compositions selected from Claims 1 to 9 further mixed with a natural rubber latex as a latex component in a weight ratio of 0.5 to 5 times with respect to styrene-butadiene rubber latex.
The sealant composition of claim 10, wherein the natural rubber latex has a solid content of 50 wt% to 70 wt% and is concentrated or diluted.