KR101339836B1 - Rubber foam heat insulating materials with excellent heat insulation and fire retardant - Google Patents

Abstract

Disclosed is a colored rubber foam insulation having excellent insulation and heat insulation. The colored rubber foam insulation according to the present invention comprises: a body unit made of nitrile butadiene rubber (NBR) form insulation or ethylene propylene diene (m-class) monomer (EPDM); an adhesion unit formed at the body unit; and a cover unit made of NBR form insulation or EPDM rubber foam insulation in which color pigments are added on the adhesion unit.

Description

Colored rubber foam insulation using adhesive with excellent flame retardant {RUBBER FOAM HEAT INSULATING MATERIALS WITH EXCELLENT HEAT INSULATION AND FIRE RETARDANT}

The present invention relates to a rubber foam insulation for use in applications such as duct insulation, and more particularly to a colored rubber foam insulation having excellent heat insulation and flame retardancy.

The most widely used rubber foam insulation for duct insulation, etc. are Nitrile Butadiene Rubber foam insulation (hereinafter referred to as NBR rubber foam insulation) and Ethylene Propylene Diene (M-class) Monomer) foam insulation (hereinafter EPDM rubber foam insulation).

EPDM rubber foam insulation has the advantages of low cost but excellent heat insulation and heat resistance. In addition, NBR rubber foam insulation has the advantage of excellent heat insulation and workability and excellent flame retardancy.

Such rubber foam insulation is generally black. In recent years, colored rubber foam insulation having a specific color in addition to black has been developed due to improvement in appearance and statutory regulations. In the case of such colored rubber foam insulation, colored pigment is included in the rubber foam insulation material. However, in the case of a conventional colored rubber foam insulation, it is known that the thermal insulation is not good, because the colored pigment contained in the raw material acts as a factor for lowering the thermal insulation.

Accordingly, there is a need for a colored rubber foam insulation that can be colored while minimizing thermal deterioration.

Background art related to the present invention is Republic of Korea Patent Publication No. 10-1037383 (2011.05.26. Announcement), the document discloses a high heat-resistant rubber foam insulation and its manufacturing method.

It is an object of the present invention to provide a rubber foam insulation having excellent heat insulation and flame retardancy.

Rubber foam insulation according to an embodiment of the present invention for achieving the above object is formed of NBR (Nitrile Butadiene Rubber) rubber foam insulation or EPDM (Ethylene Propylene Diene (M-class) Monomer); An adhesive portion formed on the body portion; And a cover part formed of an NBR rubber foam heat insulating material or an EPDM rubber foam heat insulating material to which a colored pigment is added on the adhesive part.

At this time, the cover portion is preferably formed to have a thickness of 2 ~ 10mm.

In addition, the body portion 100 parts by weight of NBR or EPDM, 7-15 parts by weight of polytetrafluoroethylene, 5-20 parts by weight of diaminodiphenylmethane, 2-6 parts by weight of epoxy resin, 1-4 parts by weight of phosphate ester, oxidation It is preferable to include 3.0-7.0 weight part of molybdenum, 8-14 weight part of benzotriazoles, and 4-7 weight part of talc. In this case, the body portion may further include 5 parts by weight or less of the acrylamide compound, based on 100 parts by weight of the NBR or EPDM.

In addition, the cover part 100 parts by weight of NBR or EPDM, 7-15 parts by weight of polytetrafluoroethylene, 5-20 parts by weight of diaminodiphenylmethane, 2-6 parts by weight of epoxy resin, 1-4 parts by weight of phosphate ester, oxidation It is preferable to include 3.0-7.0 weight part of molybdenum, 8-14 weight part of benzotriazoles, 4-7 weight part of talc, and 5-15 weight part of pigments. In this case, the cover part may further include 5 parts by weight or less of the acrylamide compound, based on 100 parts by weight of the NBR or EPDM.

In addition, the pressure-sensitive adhesive portion is preferably formed of an adhesive containing slaked lime added in 20 to 30 parts by weight with respect to 100 parts by weight of the acrylic resin. More specifically, the pressure-sensitive adhesive portion 100 parts by weight of acrylic resin, 30 to 50 parts by weight of terpene phenol resin, 20 to 30 parts by weight of slaked lime, 5 to 10 parts by weight of triphenyl phosphate, 3 to 5 parts by weight of zinc oxide, polydimethylsiloxane It may include 4 to 8 parts by weight.

In addition, the colored rubber foam insulation is a second adhesive portion formed on the lower surface of the body portion, an adhesive containing slaked lime added in 20 to 30 parts by weight based on 100 parts by weight of the acrylic resin; And release paper formed on a lower surface of the second adhesive part. At this time, the second adhesive portion 100 parts by weight of acrylic resin, 30 to 50 parts by weight of terpene phenol resin, 20 to 30 parts by weight of slaked lime, 5 to 10 parts by weight of triphenyl phosphate, 3 to 5 parts by weight of zinc oxide, polydimethylsiloxane It may include 4 to 8 parts by weight.

The colored rubber foam insulation according to the present invention has a structure in which a body portion formed of a rubber foam insulation containing no pigment and a cover portion formed of a rubber foam insulation containing pigment are adhered thereto.

As a result, the appearance of the color required by the user, such as red and gray, can be prevented, and the overall deterioration of heat insulating properties can be prevented.

In addition, the colored rubber foam insulation according to the present invention is an adhesive for sticking the body portion and the cover portion, it is possible to secure excellent flame resistance by applying an acrylic pressure-sensitive adhesive having a special composition.

1 schematically shows a colored rubber foam insulation according to an embodiment of the present invention.
Figure 2 schematically shows a colored rubber foam insulation according to another embodiment of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter will be described in detail with respect to the colored rubber foam insulation having excellent thermal insulation and flame retardancy according to a preferred embodiment of the present invention.

1 schematically shows a colored rubber foam insulation according to an embodiment of the present invention.

Referring to FIG. 1, the colored rubber foam insulation according to the embodiment of the present invention includes a body part 110, an adhesive part 120, and a cover part 130.

Body

Body portion 110 is the portion that gives the main thermal insulation performance in the colored rubber foam insulation according to the invention. Body portion 110 may be formed of NBR (Nitrile Butadiene Rubber) rubber foam insulation or excellent ethylene propylene diene (M-class) Monomer (EPDM) excellent insulation and flame retardancy.

More specifically, the body portion 110 is 100 parts by weight of NBR or EPDM, 7 to 15 parts by weight of polytetrafluoroethylene, 5 to 20 parts by weight of diaminodiphenylmethane, 2 to 6 parts by weight of epoxy resin, phosphate ester 1 to 4 parts by weight, 3.0 to 7.0 parts by weight of molybdenum oxide, 8 to 14 parts by weight of benzotriazole and 4 to 7 parts by weight of talc (talc) may be formed of a rubber foam insulation. This may further include a foaming agent residue included in the insulation raw material.

Rubber foam insulation having the above composition is 100 parts by weight of NBR or EPDM rubber raw material, 7 to 15 parts by weight of polytetrafluoroethylene, 5 to 20 parts by weight of diaminodiphenylmethane, 2 to 6 parts by weight of epoxy resin, 1 to 4 phosphate esters Raw materials including parts by weight, 3 to 7 parts by weight of molybdenum oxide, 8 to 14 parts by weight of benzotriazole, 4 to 7 parts by weight of talc and 1 to 20 parts by weight of a blowing agent may be prepared through a process such as foaming.

In the case of a body part manufactured from a raw material having the composition, the elongation: 500% or more, tensile strength: 80 Kgf / cm ² or more, and a limiting oxygen index (LOI): 30 or more.

Hereinafter, with respect to each component of the rubber foam insulation of the composition, its role and content based on the raw material will be described.

Polytetrafluoroethylene resins contribute to improved flame retardancy. It is preferable that the said polytetrafluoroethylene resin is added in 7-15 weight part with respect to 100 weight part of rubber raw materials. When the addition amount of polytetrafluoroethylene resin was less than 7 weight part, it was confirmed that flame retardance fell rapidly. On the contrary, when the addition amount of polytetrafluoroethylene resin exceeds 15 parts by weight, a heat shrinkage phenomenon occurs and there is a problem that the dimensional accuracy is lowered.

Diaminodiphenylmethane serves to complement the strength of rubber foam insulation. It is preferable that the said diamino diphenylmethane is contained in 5-20 weight part with respect to 100 weight part of rubber raw materials. When the content of diaminodiphenylmethane is less than 5 parts by weight, the effect of addition thereof is insufficient. On the other hand, when the content of diaminodiphenylmethane exceeds 20 parts by weight, the elongation may be drastically lowered.

The epoxy resin plays a role of improving the strength together with improving the bonding strength of each component included in the rubber foam insulation. Such epoxy resin can be used without limitation if it is a well-known epoxy resin, More preferably, the biphenyl type epoxy resin, bisphenol type epoxy resin, etc. which have two or more epoxy groups can be presented. It is preferable that the said epoxy resin is added at 2-6 weight part with respect to 100 weight part of rubber raw materials. When the content of the epoxy resin is less than 2 parts by weight, the addition effect is insufficient. On the contrary, when the content of the epoxy resin exceeds 6 parts by weight, the elongation may be sharply lowered.

Phosphate ester contributes to the improvement of flame retardancy and dispersibility. Such phosphate ester is preferably added in an amount of 1 to 4 parts by weight based on 100 parts by weight of the rubber raw material. When the addition amount of phosphate ester is less than 1 weight part, the addition effect is inadequate. On the contrary, when the addition amount of phosphate ester exceeds 4 weight part, physical properties, such as intensity | strength, may fall.

Molybdenum oxide is added for the purpose of improving the flame retardancy of the foam insulation itself. It is preferable that the said molybdenum oxide is added at 3-7 weight part with respect to 100 weight part of rubber raw materials. When the added amount of molybdenum oxide is less than 3 parts by weight, the above effects cannot be exerted properly. On the contrary, when the addition amount of molybdenum oxide exceeds 7 parts by weight, it is possible to inhibit physical properties such as elongation without further addition effect.

Benzotriazole is added for the purpose of preventing discoloration. Such benzotriazole is preferably added in an amount of 8 to 14 parts by weight based on 100 parts by weight of NBR. If the amount of the benzotriazole added is less than 8 parts by weight, there is a problem of poor workability. On the contrary, when a large amount of benzotriazole is added in excess of 14 parts by weight, there is a problem in that foaming decrease due to benzotriazole occurs.

Talc is an inorganic filler, serves to improve heat resistance, and may have an average particle diameter of approximately 3 to 6 µm. The talc is preferably added in 4 to 7 parts by weight based on 100 parts by weight of NBR. If the addition amount of talc is less than 4 parts by weight, the effect of addition is insufficient. On the contrary, when the addition amount of talc exceeds 7 parts by weight, physical properties such as elongation may decrease.

In addition, the body portion 110 may further include 5 parts by weight or less of the acrylamide compound, based on 100 parts by weight of the NBR or EPDM. As a result of adding the acrylamide compound, the elongation was further improved without deteriorating other physical properties.

Such acrylamide compounds are (meth) acrylamide, N-methyl (meth) acrylamide, N-ethyl (meth) acrylamide, N, N-diethylacryl (meth) acrylamide, N, N-propyl (meth) Krillamide, N-isopropyl (meth) krylamide, monomethyl acrylamide, N, N-dimethyl acrylamide, N, N-dimethylaminopropyl acrylamide, etc. can be used 1 or more types. When the said acrylamide compound is added, it is preferable that the addition amount is 5 weight part or less with respect to 100 weight part of rubber raw materials. When the amount of the acrylamide compound added exceeds 5 parts by weight, the tensile strength may drop rapidly.

The rubber foam insulation having the composition may be prepared by a series of processes including raw material mixing step, aging step, extrusion step and foaming step.

In the raw material mixing step, the above-mentioned components of the rubber foam insulation and the blowing agent are mixed. The blowing agent may use various known blowing agents such as AC (Azodicarbonamide) blowing agent. It is preferable that the said foaming agent is added in 1-20 weight part with respect to 100 weight part of rubber raw materials. If the blowing agent content is less than 1 part by weight, the effect of addition thereof is insufficient. On the contrary, when the foaming agent content exceeds 20 parts by weight, bubbles may be formed inside the rubber foam insulation due to an increase in gas generation amount.

Next, in the aging step, the mixed raw materials are aged. This aging may be carried out for about 5 to 50 minutes at about 40 ~ 140 ℃.

Next, in the extrusion step, the aged raw material is extruded using an extrusion die.

Next, in the foaming step, the extruded raw material is foamed.

Foaming is generally a vulcanization process performed at about 80 to 110 ° C., a preliminary foaming process to be performed at about 115 to 130 ° C., the present foaming process to be performed at about 130 to 180 ° C., and foam maturation performed at about 150 to 170 ° C. The process is subdivided into, but not necessarily limited to, various processes and temperature conditions included in the foaming step may vary depending on the type of foaming agent or the characteristics of the foaming equipment.

Adhesive

The adhesive part 120 is formed on the body part 110 and serves to adhere the body part 110 and the cover part 130.

The adhesive portion 120 is preferably formed of an adhesive having excellent flame retardancy. In the present invention, the pressure-sensitive adhesive portion 120 was formed of a pressure-sensitive adhesive containing slaked lime added at 20 to 30 parts by weight with respect to 100 parts by weight of the acrylic resin, and as a result, excellent adhesiveness and flame retardancy could be ensured.

More specifically, the adhesive portion 120 is 100 parts by weight of acrylic resin, 30 to 50 parts by weight of terpene phenol resin, 20 to 30 parts by weight of slaked lime, 5 to 10 parts by weight of triphenyl phosphate, 3 to 5 parts by weight of zinc oxide, poly It may be formed of an adhesive including 4 to 8 parts by weight of dimethylsiloxane.

At this time, when the amount of added slaked lime was less than 20 parts by weight, the effect of improving flame retardancy was somewhat insufficient. On the other hand, when the amount of added slaked lime exceeds 30 parts by weight, the flame retardancy is excellent but the adhesion is insufficient, the phenomenon that the body portion 110 and the cover portion 130 may be peeled off.

In addition, when the terpene phenol resin is less than 30 parts by weight, the thermosetting characteristics of the pressure-sensitive adhesive is insufficient, when the terpene phenol resin exceeds 50 parts by weight, there is a problem that the flame retardancy is lowered.

In the case of triphenyl phosphate, zinc oxide and polydimethylsiloxane, it was added to improve the flame retardancy or adhesiveness, and if it does not reach the above-mentioned addition amount, the flame retardancy or adhesion improvement was insufficient, and on the contrary, when it was out of the above-mentioned addition amount, Although this improves, the adhesiveness is lowered or the adhesiveness is improved, but there is a problem that the flame retardancy is lowered.

Cover

Cover portion 130 is formed on the adhesive portion 120, so that the colored rubber foam insulation according to the present invention exhibits a specific color in addition to black. To this end, the cover portion 130 is formed of an NBR rubber foam insulation or EPDM rubber foam insulation to which the colored pigment is added.

At this time, the cover 130 is preferably formed to have a thickness of 2 ~ 10mm. If the thickness of the cover portion 130 is too thin, less than 2mm, in some cases black of the body portion 110 may affect the appearance, so that the color expressed by the colored pigment may not be clearly revealed. have. On the contrary, when the thickness of the cover part 130 exceeds 10 mm, heat insulation may be reduced.

The cover part 130 may use a color pigment further added in an amount of 5 to 15 parts by weight based on 100 parts by weight of NBR or EPDM to the rubber foam insulation for forming the body part 110. More specifically, the cover portion 130 is 100 parts by weight of NBR or EPDM, 7 to 15 parts by weight of polytetrafluoroethylene, 5 to 20 parts by weight of diaminodiphenylmethane, 2 to 6 parts by weight of epoxy resin, 1 to phosphate ester 4 parts by weight, 3.0 to 7.0 parts by weight of molybdenum oxide, 8 to 14 parts by weight of benzotriazole, 4 to 7 parts by weight of talc, and 5 to 15 parts by weight of a pigment. In addition, the cover part 130 may further include 5 parts by weight or less of the acrylamide compound, based on 100 parts by weight of the NBR or EPDM.

As the colored pigment, a red pigment or a gray pigment may be used, but is not necessarily limited thereto. The amount of the colored pigment added in the cover 130 is preferably added in an amount of 5 to 15 parts by weight based on 100 parts by weight of NBR or EPDM. When the added amount of the colored pigment is less than 5 parts by weight, the desired color expression may be insufficient. On the contrary, when the added amount of the colored pigment exceeds 15 parts by weight, physical properties such as heat insulation may be lowered.

In the case of conventional colored rubber foam insulation, it is simply formed of rubber foam insulation with the addition of colored pigments. Generally, in the case of a colored pigment, it acts as a factor which lowers heat insulation. In order to produce colored rubber foam insulation having a desired color, a large amount of colored pigments can be added. Therefore, in the case of the colored rubber foam heat insulating material of a normal single layer structure, high heat insulation is hard to be exhibited.

However, in the case of the colored rubber foam insulation according to the present invention, the body portion 110 and the cover portion 130 have a structure that is adhered by the adhesive portion 120 in a separate state. In addition, in the case of the colored rubber foam insulation according to the present invention, the colored pigment is formed only in the cover portion 130. As a result, by including the colored pigment in the cover portion 130, it is possible to exhibit a desired color in appearance, while minimizing the reduction in thermal insulation performance without including the colored pigment in the body portion 110.

Figure 2 schematically shows a colored rubber foam insulation according to another embodiment of the present invention.

In the case of the colored rubber foam insulation shown in FIG. 2, as in the example shown in FIG. 1, the body part 110, the adhesive part 120, and the cover part 130 are included. However, in the case of the colored rubber foam insulation shown in Figure 2, the second adhesive portion 140 and the release paper 150 further includes.

The second adhesive part 140 is formed on the lower surface of the body portion 110 to attach the colored rubber foam insulation according to the present invention to a portion requiring heat insulation such as a duct.

Like the adhesive portion 120 described above, the second adhesive portion 140 is preferably formed of an adhesive containing slaked lime added in an amount of 20 to 30 parts by weight based on 100 parts by weight of an acrylic resin having excellent flame retardancy.

More specifically, the second adhesive part 140 is 100 parts by weight of acrylic resin, 30 to 50 parts by weight of terpene phenol resin, 20 to 30 parts by weight of slaked lime, 5 to 10 parts by weight of triphenyl phosphate, and 3 to 5 parts by weight of zinc oxide. It may be formed of an adhesive including 4 to 8 parts by weight of polydimethylsiloxane.

Release paper 150 is formed on the lower surface of the second adhesive portion 140 serves to protect the second adhesive portion 140.

Example

Hereinafter, the configuration and operation of the present invention through the preferred embodiment of the present invention will be described in more detail. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

Details that are not described herein will be omitted since the description can be inferred by those skilled in the art.

1.Manufacture of colored rubber foam insulation

Example 1

Colored rubber foam insulation made of a body part / adhesive part / cover part was prepared.

Body

100 parts by weight of NBR, 10 parts by weight of polytetrafluoroethylene, 15 parts by weight of diaminodiphenylmethane, 4 parts by weight of biphenyl epoxy resin (manufactured by Bakelite Korea), 3 parts by weight of phosphate ester, 6 parts by weight of molybdenum oxide, and benzotria 11 parts by weight of the sol, 5 parts by weight of talc and 10 parts by weight of the AC blowing agent were mixed to form a mixture, aged at 110 ° C. for 40 minutes, and extruded in an extrusion die. Thereafter, the extruded result was vulcanized at 100 ° C., pre-expanded at 120 ° C., foamed at 170 ° C. and foam aged at 160 ° C. to prepare a body part having a thickness of 22 mm.

Adhesive

An adhesive consisting of 100 parts by weight of an acrylic resin, 40 parts by weight of terpene phenol resin, 25 parts by weight of slaked lime, 8 parts by weight of triphenyl phosphate, 4 parts by weight of zinc oxide, and 6 parts by weight of polydimethylsiloxane was used.

Cover

The cover part was manufactured by the same composition and method as the body part except that 10 parts by weight of gray pigment (Lanxess, Germany) was further added to the raw material. The thickness of the cover portion was 3 mm.

Example 2

A colored rubber foam insulation was prepared in the same manner as in Example 1 except that 3 parts by weight of N-isopropylmethacrylamide was further added as an acrylamide compound to the body and cover parts of the raw material.

Comparative Example 1

The colored rubber foam insulation according to Comparative Example 1 was prepared by the same raw material and method as the cover of Example 1, except that the thickness was 35 mm.

2. Property evaluation

About the colored rubber foam heat insulating material which concerns on Examples 1-2 and the comparative example 1, the physical property of the duct insulation film was evaluated by the following method.

1) Tensile strength and elongation

Tensile strength and elongation were measured according to IEC-60811-1-1.

2) marginal oxygen index

In accordance with ASTM D 2863, limiting oxygen index (Limiting Oxygen Index; LOI) was measured to evaluate the smoke inhibition.

3) flame retardant

Class "0", "1", "2" in accordance with the international flame retardant standards BS 476 Part-6, etc., and when the class "0" is the best flame retardancy.

4) heat insulation

Insulation was evaluated by measuring the thermal conductivity in accordance with KS M 6962. The lower the thermal conductivity, the better the thermal insulation.

Table 1 shows the physical property evaluation results for the colored rubber foam insulation according to Examples 1 and 2 and Comparative Example 1.

[Table 1]

In the case of the colored rubber foam insulation according to Example 1 consisting of a body portion, an adhesive portion, and a cover portion, the colored rubber foam insulation according to Comparative Example 1 formed as a single layer did not show a significant difference in strength and flame retardancy.

However, in the case of the colored rubber foam insulation according to Example 1, the thermal insulation was much superior to the colored rubber foam insulation according to Comparative Example 1 by showing a lower thermal conductivity.

In addition, in the case of the colored rubber foam insulation according to Example 2 in which the N-isopropyl methacrylamide is further included in the body portion and the cover portion, the flame retardancy and heat insulation similar to the colored rubber foam insulation according to Example 1 were shown. Elongation was higher than the colored rubber foam insulation according to Example 1.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. These changes and modifications may be made without departing from the scope of the present invention. Accordingly, the scope of the present invention should be determined by the following claims.

110: body portion 120: adhesive portion
130: cover portion 140: second adhesive portion
150: release paper

Claims (10)

Body parts formed of NBR (Nitrile Butadiene Rubber) rubber foam insulation or EPDM (Ethylene Propylene Diene (M-class) Monomer);
An adhesive part formed on the body part with an adhesive containing slaked lime added in an amount of 20 to 30 parts by weight based on 100 parts by weight of an acrylic resin; And
Colored rubber foam insulation comprising a; cover portion formed of an NBR rubber foam insulation or EPDM rubber foam insulation to which the colored pigment is added.
The method of claim 1,
The cover
Colored rubber foam insulation, characterized in that formed in a thickness of 2 ~ 10mm.
The method of claim 1,
The body
100 parts by weight of NBR or EPDM, 7-15 parts by weight of polytetrafluoroethylene, 5-20 parts by weight of diaminodiphenylmethane, 2-6 parts by weight of epoxy resin, 1-4 parts by weight of phosphate ester, 3.0-7.0 parts by weight of molybdenum oxide Part, 8 to 14 parts by weight of benzotriazole and 4 to 7 parts by weight of talc (talc) Colored rubber foam insulation.
The method of claim 3,
The body
Colored rubber foam insulation, characterized in that it further comprises 5 parts by weight or less of acrylamide compound, based on 100 parts by weight of the NBR or EPDM.
The method of claim 1,
The cover
100 parts by weight of NBR or EPDM, 7-15 parts by weight of polytetrafluoroethylene, 5-20 parts by weight of diaminodiphenylmethane, 2-6 parts by weight of epoxy resin, 1-4 parts by weight of phosphate ester, 3.0-7.0 parts by weight of molybdenum oxide Part, 8 to 14 parts by weight of benzotriazole, 4 to 7 parts by weight of talc, and 5 to 15 parts by weight of pigmented rubber foam insulation.
The method of claim 5,
The cover
Colored rubber foam insulation, characterized in that it further comprises 5 parts by weight or less of acrylamide compound, based on 100 parts by weight of the NBR or EPDM.
delete The method of claim 1,
The adhesive
100 parts by weight of acrylic resin, 30 to 50 parts by weight of terpene phenol resin, 20 to 30 parts by weight of slaked lime, 5 to 10 parts by weight of triphenyl phosphate, 3 to 5 parts by weight of zinc oxide, and 4 to 8 parts by weight of polydimethylsiloxane. Colored rubber foam insulation.
The method according to any one of claims 1 to 6 and 8,
The colored rubber foam insulation
A second adhesive part formed on a lower surface of the body part with an adhesive containing slaked lime added in an amount of 20 to 30 parts by weight based on 100 parts by weight of an acrylic resin; And
Colored rubber foam insulation, characterized in that it further comprises a release paper formed on the lower surface of the second adhesive portion.
10. The method of claim 9,
The second adhesive portion
100 parts by weight of acrylic resin, 30 to 50 parts by weight of terpene phenol resin, 20 to 30 parts by weight of slaked lime, 5 to 10 parts by weight of triphenyl phosphate, 3 to 5 parts by weight of zinc oxide, and 4 to 8 parts by weight of polydimethylsiloxane. Colored rubber foam insulation.

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