KR102079057B1 - Recycled adhesive seal with high adhesive force and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a recycled high adhesive seal and a manufacturing method thereof, wherein the recycled high adhesive seal contains: 100 parts by weight of a waste synthetic rubber sheet composition; 2 to 15 parts by weight of process oil; 3 to 12 parts by weight of a novel rubber; 2 to 10 parts by weight of gum resin; 1 to 8 parts by weight of an adhesion promoter; and 1 to 5 parts by weight of a modifier. The present invention can provide the recycled high adhesive seal having excellent adhesion, strength, durability, dimensional stability, waterproofness, and heat resistance by recycling the waste synthetic rubber sheet which is not previously recycled but treated by landfill or incineration methods.

Description

Recycled adhesive seal with high adhesive force and manufacturing method thereof

The present invention relates to a recycled high-adhesive seal, and more particularly, to a high-adhesive seal obtained by recycling a synthetic rubber sheet containing rubber, asphalt and polymer resin, and a method for manufacturing the same.

Rubber is a kind of elastic polymer, excellent in elasticity and durability, and is a material widely used in various fields such as household goods, building materials, and industrial materials. However, it is not easily decomposed, and when waste rubber is generated, it is treated by landfill or incineration. Recently, various methods have been developed to recycle waste rubber due to lack of landfill and harmful atmosphere in the atmosphere due to incineration. Trend.

Among the methods of recycling the waste rubber, there is a method of dissolving the waste rubber generated in the tire into a powder form and mixing it with a concrete mortar composition to apply it to the construction and construction field. In this case, the cost of processing the waste rubber is low, and the elasticity of the concrete mortar composition , As the resistance to impact and dimensional stability are improved, and additional effects such as noise isolation, heat isolation and vibration reduction are obtained, waste rubber generated from tires is mainly recycled in this manner.

In addition, waste rubber such as natural rubber, synthetic rubber, waste tire, EPDM rubber, and butyl rubber is pulverized using a mechanical mixer, and mixed with various polymer resins to recycle them as functional products such as buffer mats, elastic blocks, sound absorbing and insulating materials. Method is also used.

When the waste rubber is recycled as described above, since the properties of the final product can be changed significantly depending on the properties of the rubber, only the waste rubber whose main component is rubber is used as a material to be recycled. A method of recycling rubber products including other polymer resins or asphalt has not been developed yet, and thus the composite sheet containing rubber is still treated in a manner of landfill or incineration.

Accordingly, there is a need to develop a method for recycling waste materials containing a composite sheet containing rubber.

Registered Patent No. 10-1828948 (Registration on Feb. 7, 2018)

In the present invention, it is intended to provide a high-adhesive seal having excellent adhesion and durability by recycling a synthetic rubber sheet containing rubber, asphalt and polymer resin, and a method for manufacturing the same.

One embodiment of the present invention for achieving the object as described above relates to a recycled high tack seal, wherein the recycled high tack seal is 100 parts by weight of a waste synthetic rubber sheet composition, 2 to 15 parts by weight of process oil, new material 3 to 12 parts by weight of rubber, 2 to 10 parts by weight of gum resin, 1 to 8 parts by weight of adhesion promoter and 1 to 5 parts by weight of modifier.

The waste synthetic rubber sheet composition may include 52 to 86% by weight of asphalt, 5 to 25% by weight of process oil, 5 to 20% by weight of rubber, 2 to 17% by weight of petroleum resin, and 1 to 20% by weight of calcium carbonate. .

The adhesion promoter may be conchiolin.

The modifier may include a polymer resin represented by Formula 1.

(Formula 1)

(In Formula 1, R1, R2 and R4 are ketones, R3 is an aromatic ring group (aryl group) containing an alkylsilyl group having 6 to 15 carbon atoms, R5 is an aromatic ring group (aryl group), n is 5 to 20 Integer)

Another embodiment of the present invention relates to a method of manufacturing a recycled high-adhesive seal, a waste synthetic rubber sheet composition manufacturing step of mixing the waste synthetic rubber sheet and asphalt and heating it to 140 to 180 ° C to produce a waste synthetic rubber sheet composition ; And 100 parts by weight of the waste synthetic rubber sheet composition, 2 to 15 parts by weight of process oil, 3 to 12 parts by weight of new rubber, 2 to 10 parts by weight of gum resin, 1 to 8 parts by weight of adhesion promoter and 1 to 5 parts by weight of modifier It includes; recycled high-adhesive seal manufacturing step of manufacturing the recycled high-adhesive seal.

The high-adhesive seal of the present invention has the effect of reducing the cost, time and environmental pollution problems required for the disposal of the rubber sheet by being obtained by recycling the existing synthetic rubber sheet.

In addition, the high adhesive seal of the present invention has excellent adhesion and durability, and exhibits excellent adhesion regardless of the type of surface to be adhered.

Before describing in detail through the preferred embodiments of the present invention, terms or words used in the present specification and claims should not be interpreted as being limited to conventional or dictionary meanings, meanings consistent with the technical spirit of the present invention. And should be interpreted as a concept.

Throughout this specification, when a part “includes” a certain component, it means that the component may further include other components, not to exclude other components, unless otherwise stated.

Hereinafter, an embodiment of the present invention will be described. However, the scope of the present invention is not limited to the following preferred embodiments, and those skilled in the art can implement various modified forms of the contents described herein within the scope of the present invention.

First, the present invention relates to a recycled high-adhesive seal obtained by recycling a waste synthetic rubber sheet and a method for manufacturing the same, and it is possible to reduce the cost required for disposal by recycling the synthetic rubber sheet that was previously disposed of, and environmental load. There is an advantage that can be reduced.

Specifically, the recycled high adhesive seal of the present invention is 100 parts by weight of a synthetic rubber sheet composition, 2 to 15 parts by weight of process oil, 3 to 12 parts by weight of new rubber, 2 to 10 parts by weight of gum resin, 1 to 8 parts by weight of adhesion promoter Parts and modifiers 1 to 5 parts by weight.

The waste synthetic rubber sheet composition is to provide solubility to waste synthetic rubber sheets including asphalt, rubber, petroleum resin, and the like. Conventionally, synthetic rubber sheet products including at least two or more components are uniform in accordance with quality standards. It is difficult to recycle to have one property, and it is difficult to apply the recycled product to the actual industrial field, so it was generally disposed of in a landfilling method, but the present invention provides a technique for recycling a synthetic rubber sheet that has been disposed of as such. Problems such as lack of landfill due to disposal, environmental load, air pollution, and disposal cost can be solved.

The waste synthetic rubber sheet composition used in the present invention is obtained by melting a waste synthetic rubber sheet in hot asphalt, 52 to 86% by weight of asphalt, 5 to 25% by weight of process oil, 5 to 20% by weight of rubber, and petroleum resin 2 to 17% by weight and 1 to 20% by weight of calcium carbonate.

In addition, if the waste synthetic rubber sheet contains additional additives such as flame retardants, plasticizers, lubricants, antioxidants, light stabilizers, antistatic agents, heat stabilizers, etc., these additives total 0.01 to 2.00 wt% in the waste synthetic rubber sheet composition It can be included in the scope of.

When the composition ratio of the components constituting the waste synthetic rubber sheet composition is out of the above-mentioned weight range, the physical properties of each product are different even if the properties of the recycled high-adhesion seal finally obtained are out of quality standards or satisfy the quality standards. Since it may deteriorate, it is preferable to use a waste synthetic rubber sheet composition having the above-described components and component ratios.

The process oil is added to improve the waterproof performance and fluidity of the recycled high-adhesive seal, and at least one or more types of petroleum-based, coal-based, and vegetable-based oils may be used as the process oil.

Aromatic-based, naphthenic-based, and paraffin-based oils may be used as the petroleum-based and coal-based oils, and linseed oil, soybean oil, linseed oil, rice bran oil, etc. may be used as the vegetable-based oil, but are not limited thereto.

The process oil may be included in 2 to 15 parts by weight based on 100 parts by weight of the waste synthetic rubber sheet composition, and when it is contained in less than 2 parts by weight, the viscosity of the recycled high-adhesive seal is excessively high, making it difficult to uniformly mix in the manufacturing process. And, there is a problem that the workability is deteriorated, and when it exceeds 15 parts by weight, the viscosity of the recycled high-adhesive seal is excessively reduced, so that the components contained in the recycled high-adhesive seal are not uniformly mixed and layer separation occurs, resulting in high adhesion of recycled material. It is preferable to be included within the above-mentioned weight ratio because the adhesive strength, durability, and workability of the seal can be reduced.

The new rubber is a rubber used as a new rubber, which is added to improve the adhesive properties and durability, weather resistance, elasticity, and chemical resistance of the recycled high adhesive seal by causing a self-crosslinking reaction in the recycled high adhesive seal. May be natural rubber or synthetic rubber.

The natural rubber may be a general natural rubber, or a modified natural rubber obtained by modifying a natural rubber, and may be, for example, polyisoprene, epoxidized natural rubber (ENR), deproteinized natural rubber (DPNR), hydrogenated natural rubber, and the like. .

Synthetic rubbers include, for example, styrene butadiene rubber (SBR), modified styrene butadiene rubber, butadiene rubber (BR), modified butadiene rubber, chlorosulfonated polyethylene rubber, epichlorohydrin rubber, fluorine rubber, silicone rubber, nitrile rubber, Hydrogenated Nitrile Rubber, Nitrile Butadiene Rubber (NBR), Modified Nitrile Butadiene Rubber, Chlorinated Polyethylene Rubber, Styrene Butadiene Styrene Rubber (SBS), Styrene Ethylene Butylene Styrene (SEBS) Rubber, Styrene Isoprene Styrene Rubber (SIS), Ethylene Propylene Rubber , Ethylene propylene diene (EPDM) rubber, hypalon rubber, chloroprene rubber, ethylene vinyl acetate rubber, acrylic rubber, hydrin rubber, vinyl benzyl chloride styrene butadiene rubber and at least one selected from the group consisting of bromo methyl styrene butyl rubber It may be the above, but is not limited thereto.

SBS rubber may be preferably used as the new rubber. In the case of SBS rubber, compatibility is excellent, and when SBS rubber is added to the recycled high adhesion seal, not only the adhesion is remarkably improved, but also the temperature of the recycled high adhesion seal. This is because it is possible to develop stable adhesive strength in various temperature environments by lowering the rate of change in viscosity with respect to less adhesion with temperature.

The new rubber is preferably included in 3 to 12 parts by weight with respect to 100 parts by weight of the waste synthetic rubber sheet composition, and when it is contained in less than 3 parts by weight, the effect of improving adhesiveness and physical properties and reducing the rate of change in viscosity with respect to temperature is negligible. And, when it is included in excess of 12 parts by weight, the viscosity of the recycled high-adhesive seal is excessively increased, so that uniform mixing is difficult and workability may be deteriorated.

The gum resin is added to improve the adhesion of the recycled high-adhesive seal, and at the same time, evenly disperse the components contained in the recycled high-adhesive seal, to improve the long-term storage stability of the recycled high-adhesive seal, waste synthetic rubber sheet composition It may be included in 2 to 10 parts by weight based on 100 parts by weight.

When the content of gumresin is less than 2 parts by weight based on 100 parts by weight of the waste synthetic rubber sheet composition, the dispersion stability of the components in the recycled high-adhesive seal becomes poor over time, and the adhesiveness and durability of the recycled high-adhesive seal during long-term storage There is a problem of poor physical properties such as, and when it is contained in excess of 10 parts by weight, the viscosity of the recycled high-adhesive seal becomes excessively high, thereby making it difficult to uniformly disperse each component and making construction difficult.

As the gum resin, at least one or more selected from the group consisting of guar gum, xanthan gum, locust bean gum, gellan gum, gum arabic, pectin and carrageenan may be used.

The adhesion promoter is intended to improve the adhesion of the waste synthetic rubber sheet composition, and conchiolin may be used as the adhesion promoter. Conkiolin is an adhesive protein contained in shellfish such as abalone, shellfish, oysters, clams, mother-of-pearl, etc., and has excellent adhesiveness, and also has the advantage of forming strong adhesive strength even in the presence of water.

As conkiolin is used as an adhesion promoter in the recycled high-adhesive seal, the adhesion of the recycled high-adhesive seal is improved, and there is an advantage of expressing strong adhesion even in a humid environment.

Such an adhesion promoter may be included in 1 to 8 parts by weight based on 100 parts by weight of the waste synthetic rubber sheet composition, and when it is contained in less than 1 part by weight, it is difficult to obtain an effect of enhancing adhesion, and when it exceeds 8 parts by weight, recycle The adhesive strength of the high-adhesive seal is improved, but it is preferable to be included within the above-mentioned weight ratio because physical properties such as durability and strength may be deteriorated.

The modifier is added to increase the waterproof performance and dimensional stability of the recycled high-adhesive seal, and a polymer resin represented by Chemical Formula 1 may be included as the modifier.

(Formula 1)

(In Formula 1, R1, R2 and R4 are ketones, R3 is an aromatic ring group (aryl group) containing an alkylsilyl group having 6 to 15 carbon atoms, R5 is an aromatic ring group (aryl group), n is 5 to 20 Integer)

The modifier may be included to have a weight range of 1 to 5 parts by weight with respect to 100 parts by weight of the waste synthetic rubber sheet composition, and when the content of the modifier is contained in less than 1 part by weight, the waterproof performance and dimensional stability improvement effect of the recycled high adhesion seal Is insignificant, and if it exceeds 5 parts by weight, a problem that the strength is lowered occurs, so it is preferably included within the above-mentioned weight range.

At this time, in order to improve the modification effect due to the modifier represented by Chemical Formula 1, and further obtain the strength improvement effect, it is preferable that at least one or more modifiers of the compounds represented by Chemical Formula 2 or Chemical Formula 3 are further included, More preferably, a compound represented by Chemical Formula 1, Chemical Formula 2 and Chemical Formula 3 may be included.

(Formula 2)

(In formula 2, R1 is hydrogen or C1-4 alkyl, and X is C1-10 alkylene)

(Formula 3)

(In the formula (3), R1 is a hydrogen or methyl group, R2 is an alkyl group having 2 to 14 carbon atoms)

In formula (3), R1 is hydrogen or a methyl group. R2 is an alkyl group having 2 to 14 carbon atoms, preferably 3 to 12 carbon atoms, and more preferably 4 to 9 carbon atoms. Moreover, although the alkyl group of R2 may be either linear or branched, branched chain is preferable at the point which can make the glass transition point of an acrylic polymer low.

When all of the compounds represented by Formula 1, Formula 2 and Formula 3 are included as a modifier, the total content of the compounds represented by Formula 2 and Formula 3 is 5 to 24 parts by weight with respect to 100 parts by weight of the compound represented by Formula 1 It is preferable, but when it is included in less than 5 parts by weight, the strength improvement effect is insignificant, and when it is included in excess of 24 parts by weight, it is preferable to be included within the above-mentioned weight range because dimensional stability may be poor.

At this time, in order to increase compatibility, dispersibility, and mixability, the compound represented by Formula 2 and the compound represented by Formula 3 are preferably included to have a range of 1: 1 to 2 weight ratio.

On the other hand, another embodiment of the present invention relates to a method for manufacturing a recycled high-adhesive seal, and the components used in the manufacturing method are the same as the components described in the embodiment of the present invention.

The method of manufacturing the recycled high-tack adhesive of the present invention comprises: a waste synthetic rubber sheet composition production step of mixing waste synthetic rubber sheet and asphalt and heating it to 140 to 180 ° C. to produce a waste synthetic rubber sheet composition; And 100 parts by weight of the waste synthetic rubber sheet composition, 2 to 15 parts by weight of process oil, 3 to 12 parts by weight of new rubber, 2 to 10 parts by weight of gum resin, 1 to 8 parts by weight of adhesion promoter and 1 to 5 parts by weight of modifier It includes; recycled high-adhesive seal manufacturing step of manufacturing the recycled high-adhesive seal.

The manufacturing step of the waste synthetic rubber sheet composition is a step for imparting solubility to the waste synthetic rubber sheet including asphalt, rubber, petroleum resin, etc. to make it recyclable, mixing the waste synthetic rubber sheet and asphalt, and 140 It is a step of preparing the waste synthetic rubber sheet composition by extracting asphalt, rubber, petroleum resin, etc. contained in the waste synthetic rubber sheet by heating to ~ 180 ° C.

In this step, the foreign matter contained in the waste synthetic rubber sheet, or when the waste synthetic rubber sheet is collected, is filtered by a filter, so that the waste synthetic rubber sheet composition has a higher purity and is recycled to be manufactured later. The quality of the seal can be maintained uniformly.

In this case, the size of the pores of the filter used is not particularly limited, but it is preferable that the foreign substances such as garbage, tree branches, and support are filtered while passing the filler contained in the waste synthetic rubber sheet.

The waste synthetic rubber sheet composition obtained through the manufacturing step of the waste synthetic rubber sheet composition comprises 52 ~ 86% by weight of asphalt, 5 ~ 25% by weight of process oil, 5 ~ 20% by weight of rubber, 2 ~ 17% by weight of petroleum resin and 1 ~ of calcium carbonate 20% by weight.

Next, a recycled high-adhesive seal manufacturing step is performed by mixing the waste synthetic rubber sheet composition with process oil, new rubber, gum resin, adhesion promoter and modifier to produce a recycled high-adhesive seal.

This step can be carried out in two steps to increase the efficiency of the reforming reaction due to the modifier. First, 100 parts by weight of the waste synthetic rubber sheet composition, 3 to 12 parts by weight of new rubber, and 1 to 5 parts by weight of the modifier 100 ~ The first mixing step is performed by mixing at 150 ° C. to cause a reforming reaction due to the modifier. Through this step, the rubber, the petroleum resin and the modifier form a copolymer or crosslink to improve the physical properties of the recycled high adhesion seal.

Next, after the mixture obtained through the first mixing step is cooled to 60 to 90 ° C., 2 to 10 parts by weight of gum resin and 1 to 8 parts by weight of the adhesion promoter are added to 100 parts by weight of the waste synthetic rubber sheet composition to the mixture. A second mixing step of further mixing is performed.

The recycled high-adhesion seal obtained through this manufacturing step is excellent in adhesion and can adhere materials of various materials, and has excellent strength, durability, dimensional stability, waterproofness, and heat resistance, so it can be applied to various fields as well as construction and building. There are advantages.

Hereinafter, specific actions and effects of the present invention will be described through an embodiment of the present invention. However, this is provided as a preferred example of the present invention, and the scope of the present invention is not limited according to embodiments.

[ Manufacturing example ]

First, in the process of manufacturing a 2 to 3 mm thick waterproof sheet comprising a release layer, an adhesive layer, a center layer, an asphalt layer, and a release layer, a piece of waterproof sheet generated after cutting is collected to remove the release layer and the remaining piece waterproof sheet After mixing with asphalt (AP-3) in a 1: 1 weight ratio, heating at 170 ° C. for 1 hour to melt the adhesive layer and the asphalt layer of the piece waterproof sheet together with the added asphalt, and then the PE nonwoven fabric layer as the central layer. The remaining synthetic rubber sheet composition was filtered and extracted.

At this time, the adhesive layer of the piece waterproof sheet used includes asphalt, process oil, SBS rubber, C5-based petroleum resin, calcium carbonate and additives (a water-repellent agent, heat resistance improver), and the asphalt layer contains asphalt, SBS rubber and additives. What was included was used.

Next, 1,000 g of the previously obtained waste synthetic rubber sheet composition, 83 g of new SBS rubber, and 36 g of modifier were mixed and mixed at 140 ° C. for 2 hours to perform a reforming reaction, cooled to room temperature to 75 ° C., and paraffinic process oil 101 g, xanthan gum 55 g, and 50 g of conchiolin were added and stirred for 30 minutes to prepare a recycled high adhesion seal of Example 1.

At this time, based on 100 parts by weight of the compound represented by Chemical Formula 1 as a modifier, a mixture of 8 parts by weight of Compound represented by Chemical Formula 2 and 12 parts by weight of Compound represented by Chemical Formula 3 was used.

[ Experimental example  One]

Adhesive strength, flexural resistance, tensile strength, dimensional stability, water permeation resistance performance, wet surface adhesion performance, structure behavior response performance, water loss resistance performance and temperature dependent performance (heat resistance / Cold resistance) was measured, and the results are shown in Table 1.

The adhesive strength is applied to the concrete surface in an amount of 1 kg / m ² of recycled high-adhesive seal, and after laminating the PE film on it, curing it at room temperature for a week, and then bonding the PE film at an angle of 90º and 100 mm / min. The strength at the time of peeling at a speed was measured and confirmed.

In addition, the test body prepared in the same manner was immersed in water at room temperature for 7 days, then taken out, dried at room temperature for 1 hour after removing the moisture on the surface, and then the strength at the time of peeling in the same manner was measured.

Flexural resistance, by applying a recycled high-adhesion seal between PE films in a thickness of 1 mm, cured at room temperature for 7 days, the test piece was left for about 2 hours at a temperature of -20 ° C, and then the test piece at an angle of 170º and It was bent at a speed of 100 mm / min, and it was confirmed by visually observing whether or not the residue on the surface of the recycled high-adhesion seal and peeling between the recycled high-adhesion seal and the PE film were visually observed. It was judged to be good when no balance or peeling occurred, and it was judged to be bad when either of them occurred.

Tensile strength, after applying calcium carbonate powder to remove the adhesive force on both sides of the recycled high-adhesive seal formed to a thickness of 1mm, using a tensile tester to tension under the conditions of a bite distance of 60mm and a tensile speed of 200mm / min, the test piece The strength at the time of breakage was measured and confirmed. At this time, the temperature was measured while changing to -20 ° C, 22 ° C, and 60 ° C to measure tensile strength at low, normal, and high temperatures.

Dimensional stability is prepared by recyclable high-adhesive seals with a size of about 200 × 150 × 1mm, cured for 7 days to prepare specimens, and then coated with calcium carbonate powder to remove adhesion on both sides, before and after heat treatment. After measuring the length, aged in a 50 ° C. oven for 24 hours and taken out of the oven, the lengths of the width and length were measured, and the shrinkage ratios for the width and length were calculated and confirmed before heat treatment.

The permeation resistance performance, wet surface adhesion performance, structure behavior response performance, water loss resistance performance and temperature-dependent performance (heat / cold resistance) are tested by KS F 4935-08 (adhesive flexible rubber asphalt-based water leakage repair injection type sealing material) It was measured according to the method.

Test Items Example 1 Adhesion strength (N / mm) Normal 4.7 Immersion 4.3 Flex resistance Good Tensile strength (N / mm) (-20 ℃) 9.2 (22 ℃) 8.4 (60 ℃) 6.8 Dimensional stability (%) horizontal 2.3 Vertical 1.9 Permeability resistance performance Not pitched Wetting surface adhesion performance 60 seconds or more Structure behavior response performance Not pitched Water loss resistance performance (%) -0.02 Temperature dependent performance (heat resistance) Not pitched Temperature dependent performance (cold resistance) Not pitched

As shown in Table 1, it can be seen that the recycled high adhesion seal of the present invention has excellent adhesive strength, flexural resistance, tensile strength and dimensional stability, and exhibits excellent physical properties even at low or high temperatures.

In addition, as a result of the water permeation resistance performance test, the water of the water permeable through the specimen of Example 1 was confirmed to be excellent in waterproof performance, and the wet surface adhesion performance test result, after adhesion to the wet surface, maintained adhesion for 60 seconds or more Since the adhesive strength was maintained for a longer time than the reference time of 60 seconds, it was confirmed that the wet surface adhesion performance was also excellent.

In addition, it was confirmed that the ability to respond to the structure's behavior and the waterproofing ability is maintained at high and low temperatures, and the rate of mass change in water is within -0.1%, which is the reference value, and the waterproofing performance in various environments is maintained.

[ Experimental example  2]

Using the same method as the recycled high-adhesive seal of Example 1, manufactured by changing the amount of conkiolin added, and measuring the adhesive strength and tensile strength at room temperature and high temperature according to the change in the amount of conkiolin, and Table 2 shows the results. The content of conkiolin in Table 2 means the content (parts by weight) based on 100 parts by weight of the waste synthetic rubber sheet composition.

Test Items Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Conkiolin content (parts by weight) 5.0 1.2 7.7 - 0.7 8.3 Adhesion strength (N / mm) Normal 4.7 4.5 4.8 2.6 3.1 4.9 Immersion 4.3 4.0 4.5 1.5 1.9 4.6 Tensile strength (N / mm) (22 ℃) 8.4 8.5 8.1 8.7 8.3 6.5 (60 ℃) 6.8 7.1 6.5 7.4 7.3 4.1

Referring to the results of Table 2, Examples 1 to 3 and Comparative Example 3 show excellent adhesive strength in the general environment, and the adhesive strength after immersion is 0.3 to 0.5 N than the adhesive strength in the general environment. The adhesive strength is maintained even when immersed because it appears as low as / mm, whereas in Comparative Examples 1 and 2, the adhesive strength after general immersion and after immersion is markedly low, and the adhesive strength after immersion in general environment It was confirmed to appear lower than 1 N / mm compared to.

From these results, it was confirmed that the adhesive strength is improved when the content of conkiolin to 100 parts by weight of the waste synthetic rubber sheet composition is 1 part by weight or more, and high adhesive strength is maintained even in a wet environment as compared with the general environment.

In addition, in Comparative Example 3, unlike the other specimens, not only the tensile strength at both temperature conditions was low, but the tensile strength at high temperature was significantly lower than the tensile strength at room temperature, unlike other specimens.

From these results, when the content of conkiolin is excessive, a decrease in tensile strength appears, and particularly, tensile strength at high temperature is markedly low, so conkiolin is contained in less than 8 parts by weight relative to 100 parts by weight of the synthetic rubber sheet composition. It was confirmed that it is desirable to be.

[ Experimental example  3]

A recycled high-adhesive seal was prepared using the same method as the recycled high-adhesive seal of Example 1, but was prepared by changing the content of the modifier, and the tensile strength and dimensional stability of each test piece were measured and the results are shown in Table 3. Did. In Table 3, the content of the modifier means a content (parts by weight) based on 100 parts by weight of the waste synthetic rubber sheet composition.

Test Items Example 1 Example 4 Comparative Example 4 Comparative Example 5 Comparative Example 6 Modifier content (parts by weight) Compound of Formula 1 3.00 4.70 - - 4.20 Compound of Formula 2 0.24 - - 1.60 0.55 Compound of Formula 3 0.36 - - 2.25 0.76 Sum 3.60 4.70 - 3.85 5.51 Tensile strength (N / mm) (-20 ℃) 9.2 9.0 8.6 8.7 8.7 (22 ℃) 8.4 8.1 6.8 7.5 8.0 (60 ℃) 6.8 6.5 5.0 5.8 5.0 Dimensional stability (%) horizontal 2.3 2.1 4.2 4.1 2.1 Vertical 1.9 1.7 3.3 3.5 1.5

Looking at the experimental results in Table 3, in the case of Comparative Example 4, which does not contain a modifier, tensile strength and dimensional stability are significantly reduced compared to Examples 1, 4, and 5 and 6 You can confirm that.

In addition, when Example 1 and Comparative Example 5, which does not contain the compound of Formula 1 as a modifier, showed that Comparative Example 5 had lower tensile strength and dimensional stability, despite the higher total modifier content.

In addition, when comparing Example 1 and Comparative Example 6 containing all of the compounds of Formula 1 to Formula 3 as a modifier, when the total content of the modifier for 100 parts by weight of the synthetic rubber sheet composition exceeds 5 parts by weight, Despite the increase in the content of the compound of Formula 2 and the compound of Formula 3, which contributes to the improvement of strength, the tensile strength was found to decrease, and the rate of decrease in tensile strength at high temperature was remarkably high.

Looking at Example 1 and Example 4, when both the compositions of Formulas 1 to 3 are included as the modifier, the dimensional stability is similar even if the total amount of the modifier is decreased, and the tensile strength is rather improved.

Accordingly, it can be seen from the results of this experiment that when the total content of the modifier is contained in less than 5 parts by weight with respect to 100 parts by weight of the waste synthetic rubber sheet, the effect of improving tensile strength and dimensional stability can be seen. In the case of containing all of the compounds, it was confirmed that the physical properties of the recycled high-adhesion seal can be improved while reducing the amount of modifier used.

The present invention is not limited to the specific embodiments and descriptions described above, and various modifications can be carried out by anyone having ordinary knowledge in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. And such modifications are within the protection scope of the present invention.

Claims (5)

Waste synthetic rubber sheet composition 100 parts by weight, 2-15 parts by weight of process oil, 3-12 parts by weight of new rubber, 2-10 parts by weight of gum resin, 1-8 parts by weight of adhesion promoter and 1-5 parts by weight of modifier,
The adhesion promoter, characterized in that the conkiolin, recycled high adhesion seal. According to claim 1,
The waste synthetic rubber sheet composition is characterized by comprising 52 to 86% by weight of asphalt, 5 to 25% by weight of process oil, 5 to 20% by weight of rubber, 2 to 17% by weight of petroleum resin and 1 to 20% by weight of calcium carbonate. Recycled high adhesion seal. delete According to claim 1,
The modifier, characterized in that it comprises a polymer resin represented by the formula (1), recycled high adhesion seal.
(Formula 1)

(In Formula 1, R1, R2 and R4 are ketones, R3 is an aromatic ring group (arylene group) containing an alkylsilyl group having 6 to 15 carbon atoms, R5 is an aromatic ring group (arylene group), n is 5 to 20 Integer) Waste synthetic rubber sheet composition manufacturing step of mixing the waste synthetic rubber sheet and asphalt and heating to 140 ~ 180 ℃ to prepare a waste synthetic rubber sheet composition; And
100 parts by weight of the waste synthetic rubber sheet composition and 2 to 15 parts by weight of process oil, 3 to 12 parts by weight of new rubber, 2 to 10 parts by weight of gum resin, 1 to 8 parts by weight of adhesion promoter and 1 to 5 parts by weight of modifier Including a recycled high-adhesive seal manufacturing step of manufacturing a recycled high-adhesive seal;
The adhesion promoter is characterized in that the conkiolin, a method of manufacturing a recycled high adhesion seal.