KR102245614B1 - Method for evaluating compatibility of hydrogenated hydrocarbon resin with ethylene vinylacetate resin - Google Patents

Abstract

In the present invention, the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin (EVA) can be easily evaluated, and from this, a hydrogenated petroleum resin exhibiting excellent compatibility with EVA having various vinyl acetate (VA) contents and A method for evaluating the compatibility of hydrogenated petroleum resins with EVA that can be supplied is provided.

Description

Method for evaluating the compatibility of hydrogenated petroleum resin with ethylene vinyl acetate resin {METHOD FOR EVALUATING COMPATIBILITY OF HYDROGENATED HYDROCARBON RESIN WITH ETHYLENE VINYLACETATE RESIN}

The present invention relates to a method for evaluating the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin, and more particularly, a method for evaluating the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin, and furthermore, hydrogenation by controlling the degree of hydrogenation using the same. It relates to a method for improving the compatibility of a petroleum resin with an ethylene vinyl acetate resin or a method for preparing a composition containing a hydrogenated petroleum resin having improved compatibility with an ethylene vinyl acetate resin, and a composition containing a hydrogenated petroleum resin prepared according to the above manufacturing method. .

Ethylene vinyl acetate resin (EVA) has varying amounts of VA (Vinyl acetate) for each product. Typically, the VA content of EVA products used for hot melt is at the level of 19 to 33% by weight, and a product having a VA content of 28% is generally used.

Conventional hot melt adhesives have EVA as a main component, and are composed of additives such as a tackifier for imparting adhesion, wax or oil for lowering the viscosity, and antioxidants. As tackifiers, gum rosin, rosin ester, petroleum resin, coumaron resin, acrylic modified petroleum resin, etc. are used, and the waxes include paraffin wax/oil, polyethylene wax, polypropylene wax, plasticizer (plasticizer, DOTP, DOP, DBTP, DEHCH, etc.) are used. At this time, if the compatibility between the ethylene vinyl acetate and the tackifier is poor, the adhesive properties deteriorate, and furthermore, there is a problem that it is difficult to have the form of the adhesive.

On the other hand, petroleum resin is a representative tackifier and is used in products such as hot melt adhesives, adhesive tapes, paints, ink, rubber, and tires. As a liquid or solid thermoplastic resin at room temperature, it can be used as it is after polymerization. It is being used in the form.

In general, when the compatibility is increased, it can exhibit excellent wettability. Excellent wettability enables uniform adhesion by dispersing the adhesive evenly on the surface of the adherend. In addition, since domain formation of each component due to poor compatibility does not occur, excellent processability may be exhibited during a coating process such as coating or spray spraying, thereby reducing the occurrence of defects.

In EVA, the amorphous polar region, the VA region, affects the compatibility with petroleum resin. Therefore, one type of petroleum resin cannot exhibit excellent compatibility with EVA having various VA contents.

Accordingly, it is advantageous to select a petroleum resin having excellent compatibility with EVA in order to manufacture an EVA-based HMA adhesive with excellent physical properties and to manufacture an EVA HMA adhesive with easy processability and low defects industrially.

An object of the present invention is to provide a method for evaluating the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin (EVA).

Another object of the present invention is to provide a method for improving the compatibility between a hydrogenated petroleum resin and EVA by controlling the degree of hydrogenation, or a method for preparing a composition containing a hydrogenated petroleum resin with improved compatibility with EVA using the above evaluation method. .

In addition, another object of the present invention is to provide a hydrogenated petroleum resin-containing composition having excellent compatibility with EVA manufactured by the above manufacturing method.

In order to achieve the above object, according to an embodiment of the present invention, quantifying the content of aromatic double bonds in the hydrogenated petroleum resin; And it provides a method for evaluating the compatibility of the hydrogenated petroleum resin with EVA, comprising the step of measuring a cloud point while cooling after mixing the hydrogenated petroleum resin with EVA, heating it until it becomes transparent, and cooling.

In addition, according to another embodiment of the present invention, forming a mixture comprising a hydrogenated petroleum resin and EVA; And adjusting the compatibility of the hydrogenated petroleum resin and EVA by controlling the content of aromatic double bonds in the petroleum resin through controlling the degree of hydrogenation of the petroleum resin so that the mixture satisfies any one of the following conditions i) and ii). It provides a method for preparing a composition containing a hydrogenated petroleum resin comprising:

i) When the cloud point of the mixture is reduced by more than 10% compared to the cloud point of the mixture of the completely hydrogenated petroleum resin and the EVA

ii) When no cloud point occurs and the transparency is increased compared to the mixture of the completely hydrogenated petroleum resin and the EVA

According to the present invention, it is possible to easily evaluate the compatibility of a hydrogenated petroleum resin with EVA, from which it is possible to manufacture and supply a petroleum resin-containing composition exhibiting excellent compatibility with EVA having various VA contents. In addition, the petroleum resin-containing composition may exhibit excellent adhesion when applied as a hot melt adhesive due to its excellent compatibility.

1 is a graph showing the measurement results of gel permeation chromatography for petroleum resins (Tackifier A and Tackifier D) used in Test Examples.
FIG. 2 is a graph illustrating a change in compatibility with EVA according to the content of aromatic double bonds in the hydrogenated petroleum resin in Test Example 1. FIG.
3 is a graph observing the effect of improving the compatibility with EVA according to the increase of the aromatic double bond content in the hydrogenated petroleum resin in Test Example 2.

Hereinafter, the present invention will be described in more detail. In addition, the present invention is a bar that can add various changes and have various forms, and will be described in detail below and exemplifying specific embodiments. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In addition, the meaning of "comprising" as used in the specification of the present invention specifies a specific characteristic, region, integer, step, action, element and/or component, and other characteristic, region, integer, step, action, element and/or It does not exclude the presence or addition of ingredients.

Hereinafter, a method for evaluating the compatibility of a hydrogenated petroleum resin for EVA of the present invention, a method for improving the compatibility between a hydrogenated petroleum resin and EVA by controlling the degree of hydrogenation, or a method for improving the compatibility with EVA, using the above evaluation method. A method for preparing a resin-containing composition, and a hydrogenated petroleum resin-containing composition prepared by the above manufacturing method and useful as a hot melt adhesive will be described in more detail.

The present invention is to find out that the degree of hydrogenation of a petroleum resin, that is, the polarity according to the content of aromatic double bonds remaining after the hydrogenation reaction, and the content of VA in EVA, affect the compatibility of the two resins. It provides a method for easily quantifying and evaluating the compatibility of resins using NMR or the like.

Specifically, the method for evaluating the compatibility of the hydrogenated petroleum resin with EVA according to an embodiment of the present invention,

Quantifying the content of aromatic double bonds in the hydrogenated petroleum resin (step 1); And

The hydrogenated petroleum resin is mixed with EVA, heated until transparent, and then cooled while measuring a cloud point (step 2).

In the present invention, the aromatic double bond refers to a double bond in a structural unit derived from an aromatic ring-containing monomer such as dicyclopentadiene used in the manufacture of a petroleum resin, and a double bond contained in a structural unit derived from an aromatic vinyl monomer. do.

Accordingly, in the compatibility evaluation method, the petroleum resin is not particularly limited as long as it contains an aromatic double bond in the molecule, and specifically, a dicyclopentadiene (DCPD) resin, a copolymer resin of a DCPD-based aromatic raw material, And C9-based petroleum resin or C9-C5-based copolymer petroleum resin. More specifically, the petroleum resin may be a copolymer of dicyclopentadiene and an olefinic monomer having 2 to 20 carbon atoms.

In addition, the hydrogenated petroleum resin may be partially hydrogenated (or hydrogenated) petroleum resin.

The partially hydrogenated petroleum resin may be prepared by hydrogenation reaction after polymerization of the petroleum resin.

For example, in the case of a DCPD resin containing a structural unit derived from an aromatic monomer, it may be prepared by thermally polymerizing dicyclopentadiene (DCPD) and an olefinic monomer, or by performing a catalytic polymerization and then performing a hydrogenation reaction.

Subsequently, the hydrogenation (or hydrogenation) reaction of the polymerized petroleum resin is a reaction in which hydrogen is added to an unsaturated aliphatic double bond or an aromatic double bond to form a single bond. It is possible to adjust the degree of hydrogenation of the resin by adjusting.

In the present invention, the petroleum resin completely or completely hydrogenated means a saturated state without double bonds in the molecular structure of the petroleum resin produced through a hydrogenation reaction.

Specifically, the hydrogenation reaction can be performed in either a batch type or a continuous type reactor, and in the case of using a temperature and pressure during the hydrogenation reaction, and a continuous reactor, the degree of hydrogenation can be controlled by the hydrogen flow rate. In addition, various hydrogenation catalysts may be applied during the hydrogenation reaction, and at this time, the degree of hydrogenation may be controlled through the activity of the catalyst.

The hydrogenation reaction may be carried out at 150 to 300 °C under a pressure of 50 to 150 bar. If the above-described temperature and pressure conditions are not satisfied, there is a risk that a sufficient hydrogenation reaction is not performed or the molecular structure is destroyed due to severe reaction conditions.

In addition, the hydrogenation catalysts usable during the hydrogenation reaction include nickel (Ni), Pd (palladium), rhodium (Rh), ruthenium (Ru), niobium (Nb), Pt (platinum), iron (Fe), copper ( Cu), cobalt (Co), molybdenum (Mo), gold (Au), or Raney nickel, and any one or a mixture of two or more of them may be used. Further, these catalysts may be used by being supported on a carrier such as alumina or silica.

Quantification of the content of double bonds or confirmation of the degree of hydrogenation of the hydrogenated petroleum resin prepared in this way may be performed through bromine number measurement or nuclear magnetic resonance (NMR) analysis.

The bromine number measurement or NMR analysis may be performed according to a conventional method, and the result may be analyzed. Specifically, in the case of H-NMR analysis as nuclear magnetic resonance analysis, it may be performed under conditions of 600MHz bruker NMR, acquisition time 2.73s, delay time 1s, number of scan 128, pulse 30°, and solvent CDCl _3.

In addition, after the H-NMR analysis, quantification of the content of double bonds in the hydrogenated petroleum resin can be calculated through the integration of the double bond peak region obtained as a result of the analysis.

In the case of a petroleum resin prepared by copolymerization of DCPD and an aromatic monomer and then hydrogenated, the peak between 0.4 and 3.5 ppm in H-NMR measurement shows a single bond peak such as _{-CH 3} , -CH _{2 -, etc.} A peak between 4.9 to 6.5 ppm represents a double bond peak of dicyclopentadiene, and a peak between 6.5 to 8.0 ppm represents an aromatic double bond peak derived from an aromatic monomer, and the peak intensity varies depending on the degree of hydrogenation. The aforementioned single bond, dicyclopentadiene double bond, and aromatic double bond derived from an aromatic monomer are bonds constituting hydrogenated petroleum resin, and each region is in the range of 0.4 to 3.5 ppm, in the range of 4.9 to 6.5 ppm, and in the range of 6.5 to 8.0 ppm. By integrating and expressing it as a ratio, the relative ratio (%) of each bond can be confirmed.

Next, after mixing the petroleum resin whose aromatic double bond content is confirmed with EVA, compatibility evaluation through cloud point measurement is performed.

The EVA is a copolymer of ethylene and vinyl acetate (VA), and may further include an additional comonomer within a range that does not degrade the physical properties of EVA.

The content of VA contained in EVA affects the properties of EVA, including compatibility. Accordingly, the content of VA in EVA may be determined according to the use of EVA, and as an example, when used for hot melt, the content of VA in EVA may be 19 to 33% by weight, more specifically 25 to 30% by weight, More specifically, it may be 28 to 30% by weight.

Compatibility indicates how well the resin is miscible with other compositions.In the present invention, the hydrogenated petroleum resin and EVA are mixed, heated until transparent, and then cooled, while the cloud point, which is the temperature at which the mixture becomes cloudy, is determined. It can be evaluated by measuring.

In the present invention, saying that the compatibility of the mixture of hydrogenated petroleum resin and EVA is excellent means that any one of the following conditions i) and ii) is satisfied, regardless of the mixing ratio of the hydrogenated petroleum resin and EVA. :

i) When the cloud point of the mixture is reduced by 10% or more compared to the cloud point of the mixture of the completely hydrogenated petroleum resin and the EVA

ii) When no cloud point occurs, and the transparency is increased compared to the mixture of the completely hydrogenated petroleum resin and the EVA

Specifically, the higher the cloud point of the mixture of EVA and the hydrogenated petroleum resin, the lower the compatibility, and the lower the cloud point, the better the compatibility.

In addition, compared with the cloud point of the mixture of the completely hydrogenated petroleum resin and the EVA, it means that compatibility decreases as the cloud point of the mixture of EVA and hydrogenated petroleum resin increases, and the compatibility increases as the cloud point decreases. do. When the cloud point of the mixture is reduced by 10% or more, more specifically 10 to 70%, and even more specifically 10 to 60%, compared to the cloud point of the mixture of the completely hydrogenated petroleum resin and the EVA, compatibility is It means excellence.

For example, in the case of a resin composition in which the weight ratio of EVA: hydrogenated petroleum resin: paraffin oil is 35:50:15, the cloud point of the mixture of VA 19% EVA and completely hydrogenated petroleum resin in VA 19% EVA (MI 400) (Initial cloud point) At the level of 45 to 50°C, as the content of double bonds in the hydrogenated petroleum resin increased, it decreased by about 14% to the level of 40°C, and in VA 28% EVA (MI 400), the initial cloud point was at 65 to 70°C. As the content of double bonds in the hydrogenated petroleum resin increased, it decreased by about 55% to the level of 25 to 30°C. From this, it can be seen that the compatibility of EVA is improved as the content of double bonds in the hydrogenated petroleum resin increases to a certain level.

In addition, even if the cloud point of the mixture of EVA and hydrogenated petroleum resin does not occur, the transparency is increased compared to the mixture of the petroleum resin and the EVA completely hydrogenated at room temperature, specifically 15 to 30°C. It can show excellent compatibility. Accordingly, in the method for evaluating the compatibility of petroleum resin with ethylene vinyl acetate according to an embodiment of the present invention, after the cloud point measurement step, the transparency of the mixture of the hydrogenated petroleum resin and ethylene vinyl acetate is observed, and complete It may further include comparing the transparency of the mixture of the hydrogenated petroleum resin and the ethylene vinyl acetate.

When evaluating the compatibility of the mixture of EVA and hydrogenated petroleum resin according to the present invention, the mixing ratio of the two polymers does not affect the compatibility. However, when the content of hydrogenated petroleum resin is higher than that of EVA, an excess of hydrogenated petroleum resin interferes with recrystallization of EVA, and cloud points do not occur. However, when the compatibility of the two polymers is excellent, the mixture is transparent at room temperature, or exhibits increased transparency compared to the mixture of the petroleum resin and the EVA completely hydrogenated.

In the present invention, "transparency" refers to a degree of transparency, and may be measured as a specific numerical value according to a general transparency measurement method, or may be evaluated to a degree that is discernable when observed with the naked eye.

Accordingly, in the present invention,'transparent' or'transparent' means a state in which not only the transparency is 100%, but also the state in which an object beyond the mixture of EVA and hydrogenated petroleum resin can be identified with the naked eye, and'translucent' means a mixture The color of is a state in which an object beyond the mixture can be identified with the naked eye while the object can be recognized as milky white, etc., and'opaque' means that the object beyond the mixture is not identified with the naked eye regardless of the color. In addition, it means that the transparency increases from an opaque state to a translucent state and a transparent state.

In addition, from the quantified value and cloud point of the content of aromatic double bonds in the hydrogenated petroleum resin, the optimum content of aromatic double bonds in the hydrogenated petroleum resin exhibiting excellent compatibility can be derived according to the vinyl acetate content in ethylene vinyl acetate. . Accordingly, the method for evaluating the compatibility of petroleum resins with ethylene vinyl acetate according to an embodiment of the present invention is, after the cloud point measurement step, from a value obtained by quantifying the content of aromatic double bonds in the hydrogenated petroleum resin and a cloud point, ethylene vinyl It may further include the step of deriving the content of the aromatic double bond in the hydrogenated petroleum resin that exhibits compatibility according to the vinyl acetate content in the acetate, and specifically satisfies the conditions of i) or ii).

As described above, according to the present invention, it is possible to easily evaluate the compatibility from the cloud point measurement and selectively evaluating the transparency of the mixture of the hydrogenated petroleum resin and EVA, from which it exhibits excellent compatibility with EVA of a specific VA content. The degree of hydrogenation of the petroleum resin can be checked, and a composition containing a petroleum resin having such a degree of hydrogenation can be prepared and provided.

Accordingly, according to another embodiment of the present invention, a method for controlling compatibility with EVA having various vinyl acetate (VA) contents by controlling the degree of hydrogenation of a hydrogenated petroleum resin, and a method for preparing a hydrogenated petroleum resin-containing composition using the same Is provided.

Specifically, the method of manufacturing the hydrogenated petroleum resin-containing composition comprises the steps of forming a mixture comprising the hydrogenated petroleum resin and EVA; And the compatibility of the hydrogenated petroleum resin and EVA by controlling the content of double bonds in the petroleum resin through control of the degree of hydrogenation of the petroleum resin so that the cloud point of the mixture satisfies any of the conditions of i) and ii) above. It includes the step of.

At this time, the measurement of the cloud point of the hydrogenated petroleum resin and EVA is the same as described above.

In addition, the degree of hydrogenation of the petroleum resin can be controlled by controlling one or more factors affecting the hydrogenation reaction, such as temperature, pressure, flow rate, or catalytic activity during the hydrogenation reaction, and the hydrogenation reaction is as described above. .

For example, by adjusting the degree of hydrogenation of the petroleum resin to increase the polarity according to the content of the aromatic double bond, compatibility with EVA having a high VA content can be increased. Specifically, for EVA having a VA content of 19 to 33% by weight based on the total weight of EVA, the double bond content of the hydrogenated petroleum resin, more specifically, the aromatic double bond content is greater than 0 and less than 5% by weight, more specifically Is greater than 0 and 4% by weight or less, and more specifically 2 to 4% by weight may exhibit excellent compatibility.

The petroleum resin-containing composition prepared according to the above-described method exhibits excellent compatibility with a mixture of a hydrogenated petroleum resin and EVA, so that adhesion properties can be improved when applied to a hot melt adhesive composition.

Accordingly, the petroleum resin-containing composition may be useful as a hot melt adhesive composition.

Hereinafter, the present invention will be described in more detail with reference to examples according to the present invention. However, these embodiments are only presented as examples of the invention, and the scope of the invention is not determined thereby.

Sample preparation

Samples of 5 petroleum resins that showed similar molecular weight and GPC reformation in GPC analysis, but differed in 0.2%, 2.0%, 2.5%, 3.8%, and 7.5% only in Aromatic double bond content (Ar.) through NMR analysis. As each prepared and used.

1 is a graph comparing the molecular weight distribution of Tackifier A and Tackifier D.

The Tackifier A and Tackifier D are obtained by adjusting only the degree of hydrogenation of the resin of the same polymerization lot, and as shown in FIG. 1, Tackifier A and Tackifier D have different amounts of Ar through the change of hydrogenation conditions, but the same molecular weight distribution (Ar content of Tackifier A=0.0%, Ar content of Tackifier D=3.8%).

Sample name Softening point
(℃) Molecular Weight Mw PDI Tackifier A 103.5 576 1.5 Tackifier B 100.0 506 1.4 Tackifier C 101.0 553 1.5 Tackifier D 101.5 564 1.5 Tackifier E 101.0 622 1.5

Test example One

Similarly, the compatibility of petroleum resin and EVA was evaluated using Tackifier A and Tackifier D prepared by changing the hydrogenation conditions of the lot of polymeric resin.

Specifically, the content of aromatic double bonds in the petroleum resin through H-NMR analysis under the conditions of 600MHz bruker NMR, acquisition time 2.73s, delay time 1s, number of scan 128, pulse 30°, and solvent CDCl3 for the prepared petroleum resin. (Ar.) was measured. The results are shown in Table 2 below.

Sample name Softening point
(℃) Ar. (%)
[NMR analysis] Tackifier A 103.5 0.0 Tackifier D 101.5 3.8

Subsequently, as a hot melt adhesive formulation, EVA having various VA contents as shown in Table 3 below, the hydrogenated petroleum resin, and paraffin oil were mixed at a mixing weight ratio of 35:50:15, followed by heating and cooling, while the cloud point Was measured. The results are shown in FIG. 2.

EVA type VA content
(weight%) MI
(g/cm ³ ) The tensile strength
(kg/cm ² ) Breaking point
Elongation (%) Hardness (A) EVA A 19 400 51 750 80 EVA B 28 400 29 900 64

When EVA and petroleum resin are mixed, it means that the compatibility decreases as the cloud point increases, and the compatibility increases as the cloud point decreases.

2, Ar. As the content increased, cloud point reduction (increased compatibility) occurred in the hot melt adhesive formulation using EVA A (VA 19% EVA) and EVA B (VA 28% EVA). From this, it can be seen that even the same polymerized resin may have different compatibility depending on the degree of hydrogenation.

Test Example 2

From the results in Test Example 1, Ar. The compatibility with EVA according to the content was evaluated.

The content of aromatic double bonds in the resin through H-NMR analysis under the conditions of 600MHz bruker NMR, acquisition time 2.73s, delay time 1s, number of scan 128, pulse 30˚, solvent CDCl3 for the petroleum resin prepared first (Ar. ) Was measured. The results are shown in Table 4 below.

Sample name Softening point
(℃) Ar. (%)
[NMR analysis] Tackifier A 103.5 0.0 Tackifier B 100.0 2.0 Tackifier C 101.0 2.5 Tackifier D 101.5 3.8 Tackifier E 101.0 7.5

Subsequently, in order to evaluate the compatibility according to the VA content in EVA, a mixture weight ratio of 35:50:15 of EVA having various VA contents as described in Table 3 as a hot melt adhesive formulation, the hydrogenated petroleum resin and paraffin oil After mixing with, the cloud point was measured while heating and cooling. The results are shown in FIG. 3.

As a result of the experiment, Ar. As the content increased, the cloud point of the hot melt adhesive decreased. Ar. Cloud point (improvement of compatibility) that decreases with increasing content converged to about 30°C level when EVA A (VA content: 19%) and about 40°C level when EVA B (VA content: 28%). Another Ar. The improvement in compatibility with the increase in the content is Ar. When the content was 5% or more, the degree of improvement was insignificant. From this, Ar. It can be seen that when the content is more than 0 and less than 5%, the effect of improving the compatibility can be obtained. From this, it is possible to manufacture and provide petroleum resin products with excellent compatibility with EVA with high VA content by optimizing the polarity according to the content of double bonds, specifically aromatic double bonds, by controlling the hydrogenation of petroleum resin. Can be seen.

Test Example 3

The cloud point was measured by changing the mixing ratio of the hot melt adhesive.

Specifically, the ratio of EVA B (VA content: 28%): hydrogenated petroleum resin (Tackifier A or Tackifier D) was changed and mixed in a weight ratio of 1:1, 1:3, and 3:1, respectively, and a hot melt adhesive (HMA) Was prepared. For the prepared hot melt adhesive, the cloud point was measured in the same manner as in Test Example 2, and when the cloud point was not measured, the transparency was observed with the naked eye. The results are shown in Table 5.

EVA: Mixing ratio of hydrogenated resin
(Weight ratio) HMA with Tackifier A HMA with Tackifier D Cloud point (℃) Transparency (at 25℃) Cloud point (℃) Transparency (at 25℃) 1:3 Not occurring opacity
(Dark milky white) Not occurring Translucent
(Pale milky white) 1:1 80 opacity 30 Translucent 3:1 100 opacity 45 Translucent

As a result of the experiment, EVA and Tackifier D showed excellent compatibility regardless of the mixing ratio.

Specifically, when EVA and Tackifier D were mixed in a weight ratio of 1:1, the cloud point was 30°C, and the cloud point was reduced by 62.5% compared to the case of mixing the EVA and the completely hydrogenated Tackifier A at the same content.

In addition, when EVA and Tackifier D were mixed in a weight ratio of 3:1, the cloud point was measured at the level of 45°C. This is a 55.0% decrease compared to HMA using Tackifier A.

In addition, when EVA and Tackifier D were mixed in a weight ratio of 1:3, no cloud point occurred. This cloud point did not occur because the hydrogenated petroleum resin, which is present in excess compared to EVA, prevented the recrystallization of EVA. However, compared to the case of mixing the EVA and the completely hydrogenated Tackifier A at the same content, it showed a pale milky color when observed with the naked eye, and the transparency was increased. It can be seen that the compatibility is improved from the increase in transparency.

Claims (9)

Quantifying the content of aromatic double bonds in the hydrogenated petroleum resin;
Mixing the hydrogenated petroleum resin with an ethylene vinyl acetate resin, heating it until it becomes transparent, and then cooling it while measuring a cloud point; And
Including, from the quantified value and cloud point of the content of the aromatic double bond in the hydrogenated petroleum resin, deriving the content of the aromatic double bond in the hydrogenated petroleum resin showing compatibility according to the vinyl acetate content in the ethylene vinyl acetate resin. Method for evaluating the compatibility of hydrogenated petroleum resins with ethylene vinyl acetate resins.
The method of claim 1,
The quantification of the aromatic double bond content in the petroleum resin is performed through bromine number measurement or nuclear magnetic resonance analysis, a method for evaluating the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin.
The method of claim 1,
The petroleum resin is a copolymer of dicyclopentadiene and an olefinic monomer having 2 to 20 carbon atoms, a method for evaluating the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin.
The method of claim 1,
The ethylene vinyl acetate resin is a method for evaluating the compatibility of a hydrogenated petroleum resin with an ethylene vinyl acetate resin, wherein the content of vinyl acetate is 19 to 33% by weight based on the total weight of ethylene vinyl acetate.
The method of claim 1,
After the cloud point measurement step, observing the transparency of the mixture of the hydrogenated petroleum resin and the ethylene vinyl acetate resin, and comparing the transparency of the mixture of the completely hydrogenated petroleum resin and the ethylene vinyl acetate resin further comprising , Method for evaluating the compatibility of hydrogenated petroleum resins with ethylene vinyl acetate resins.
delete Forming a mixture comprising a hydrogenated petroleum resin and an ethylene vinyl acetate resin; And
Compatibility of hydrogenated petroleum resin and ethylene vinyl acetate resin by controlling the content of aromatic double bonds in the petroleum resin by controlling the degree of hydrogenation of the petroleum resin so that the mixture satisfies any one of the following conditions i) and ii). Steps to adjust
A method for preparing a composition containing a hydrogenated petroleum resin, comprising:
i) When the cloud point of the mixture is reduced by 10% or more compared to the cloud point of the mixture of the completely hydrogenated petroleum resin and the ethylene vinyl acetate resin.
ii) When no cloud point occurs and the transparency is increased compared to the mixture of the completely hydrogenated petroleum resin and the ethylene vinyl acetate resin
The method of claim 7,
The control of the degree of hydrogenation of the petroleum resin is performed by controlling one or more of temperature, pressure, flow rate, and catalytic activity during the hydrogenation reaction of the petroleum resin, a method for producing a hydrogenated petroleum resin-containing composition.
The method of claim 7,
The hydrogenated petroleum resin-containing composition is for a hot melt adhesive, a method for producing a hydrogenated petroleum resin-containing composition.

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