JP2009263890A - Damping material for roof and roof structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damping material for a roof and a roof structure capable of easily exhibiting a rain sound reduction effect even if the temperature of a metal roof material is changed according to an environmental temperature. <P>SOLUTION: This damping material 12 for a roof is placed on a metal roof material 11. The damping material 12 comprises a thermoplastic polymeric material which contains chlorinated polyethylene thermoplastic elastomer. Swelling mica and trioctyl methyl ammonium chloride are contained in the thermoplastic polymeric material. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vibration damping material for a roof and a roof structure using the same.

As a roof structure in consideration of vibration damping properties, a structure in which a roof material and a base material are bonded using a vibration damping adhesive, a structure in which a vibration damping sheet is pasted on the back side of a folded plate, and the like are known. (See Patent Documents 1 and 2). Such a roof structure reduces the sound of rain generated by metal roofing materials during rainfall. In addition, the composition which improved damping property by mix | blending swelling mica, tetraoctyl ammonium chloride, etc. with respect to a chlorinated polyethylene-type thermoplastic elastomer is known (refer patent document 3).
JP 2005-009205 A JP-A-10-306550 JP 2004-263053 A

  Although metal roofing materials can reduce the weight of the roof as compared with roofing materials such as clay tiles, the temperature tends to change easily due to the environmental temperature or the like. In the damping material for roofs laminated | stacked on such metal roofing materials, it is easy to change temperature because the temperature of roofing material is transmitted. For example, since the temperature of the roofing material gradually decreases from the beginning of rain, such a temperature change lowers the temperature of the damping material for the roof. For this reason, when the temperature dependence in the damping performance of the damping material for roofs is comparatively large, the rain noise reduction effect is hardly exhibited.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a roof damping material and a roof structure that can easily exhibit the effect of reducing rain noise even if the temperature of the roofing material changes. is there.

  In order to achieve the above object, a roof damping material according to the invention described in claim 1 is a roof damping material laminated on a metal roof material, and is a thermoplastic polymer material, a swelling property. The gist is to contain mica and trioctylmethylammonium chloride.

  The invention according to claim 2 is the roof damping material according to claim 1, wherein the content of the swellable mica is in the range of 10 to 150 parts by mass with respect to 100 parts by mass of the thermoplastic polymer material. It is a summary.

  Invention of Claim 3 is the vibration damping material for roofs of Claim 1 or Claim 2, Content of the said trioctyl methyl ammonium chloride is 10 mass parts or more with respect to 100 mass parts of said swellable mica. The gist of this is the range.

  A fourth aspect of the present invention is the roof damping material according to any one of the first to third aspects, comprising a chlorinated polyethylene thermoplastic elastomer as the thermoplastic polymer material. And

  The gist of the roof structure of the invention described in claim 5 is that the vibration damping material for roof according to any one of claims 1 to 4 is laminated on a metal roof material.

  According to the present invention, even if the temperature of the roofing material changes, the effect of reducing rain noise is easily exhibited.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments embodying the present invention will be described in detail.
The vibration damping material for roof in this embodiment contains a thermoplastic polymer material, swellable mica, and trioctylmethylammonium chloride. Such a vibration damping material for a roof is laminated on a metal roof material, so that the rain sound generated by the vibration of the roof material during rain is reduced.

  The thermoplastic polymer material constitutes the base material of the vibration damping material for the roof. Examples of the thermoplastic polymer material include thermoplastic resins, thermoplastic elastomers, and rubbers. Examples of the thermoplastic resin include polyvinylidene chloride, polyethylene, polypropylene, ethylene / vinyl acetate copolymer, ethylene / methacrylic acid copolymer, and polyvinylidene fluoride. Examples of the thermoplastic elastomer include a polyolefin-based thermoplastic elastomer, a polyurethane-based thermoplastic elastomer, a polyvinyl chloride-based thermoplastic elastomer, a chlorinated polypropylene-based thermoplastic elastomer, and a chlorinated polyethylene-based thermoplastic elastomer.

  As rubber, acrylic rubber, acrylonitrile / butadiene copolymer rubber (NBR), styrene / butadiene copolymer rubber (SBR), butadiene rubber (BR), natural rubber (NR), isoprene rubber (IR), chloroprene rubber (CR) Etc.

  The thermoplastic polymer material may be used alone or in combination of two or more. Among thermoplastic polymer materials, it is preferable to include a chlorinated polyethylene thermoplastic elastomer from the viewpoint that the temperature range in which rain noise can be suitably reduced is easily adjusted by the chlorine content or the like. The chlorine content of the chlorinated polyethylene thermoplastic elastomer is preferably 20 to 60% by mass, more preferably 30 to 50% by mass. When the chlorine content of the chlorinated polyethylene-based thermoplastic elastomer is less than 20% by mass, the polarity becomes low, and the compatibility with trioctylmethylammonium chloride may be lowered. On the other hand, if it exceeds 60% by mass, it may be difficult to significantly increase the rain noise reduction effect within a predetermined temperature range.

  Various resin materials may be blended with the chlorinated polyethylene thermoplastic elastomer. Examples of the resin material blended with the chlorinated polyethylene thermoplastic elastomer include polyethylene, polypropylene, polyvinyl chloride, ABS, and various rubbers. When blending a polymer with a chlorinated polyethylene-based thermoplastic elastomer, it is preferable that the chlorinated polyethylene-based thermoplastic elastomer is contained in an amount of 50% by mass or more and 70% by mass or more based on the base material. More preferably. Various physical properties of the chlorinated polyethylene thermoplastic elastomer can be adjusted by crosslinking with a peroxide, an amine or the like.

  The content of the thermoplastic polymer material in the vibration damping material for roof is preferably 20 to 90% by mass, more preferably 30 to 85% by mass, and further preferably 40 to 70% by mass. When the content of the thermoplastic polymer material in the roof damping material is less than 20% by mass, the formability of the roof damping material may be deteriorated. On the other hand, when the content of the thermoplastic polymer material in the vibration damping material for roof exceeds 90% by weight, it becomes difficult to blend an effective amount of a component such as trioctylmethylammonium chloride.

  By containing swellable mica together with trioctylmethylammonium chloride, the effect of reducing rain noise is enhanced within the temperature range of the roofing material. Swellable mica is a mica that has the property of swelling with a polar solvent such as water. The ions existing between the layers of the swellable mica are lithium, sodium, or strontium, and the swellable mica swells by ion exchange with ions in the polar solvent. Examples of the swellable mica include Na type tetrasilicic fluorine mica, Li type tetrasilicic fluorine mica, Na type fluorine teniolite, Li type fluorine teniolite, and the like. Swellable mica may be contained alone or in combination of two or more.

  The content of the swellable mica in the roof damping material is preferably 10 to 150 parts by mass, more preferably 20 to 140 parts by mass, and still more preferably 30 to 120 parts by mass with respect to 100 parts by mass of the thermoplastic polymer material. Part. When the content of the swellable mica in the vibration damping material for roof is less than 10 parts by mass, it is difficult to significantly increase the rain noise reduction effect. On the other hand, when the content of swellable mica in the vibration damping material for roof exceeds 150 parts by mass, the moldability of the vibration damping material for roof may be deteriorated.

  By containing trioctylmethylammonium chloride together with the swellable mica, the effect of reducing rain noise is enhanced in the temperature range of the roofing material. The content of trioctylmethylammonium chloride is preferably 10 parts by mass or more, more preferably 20 parts by mass or more, and further preferably 30 parts by mass or more with respect to 100 parts by mass of the swellable mica. When the content of trioctylmethylammonium chloride is less than 10 parts by mass with respect to 100 parts by mass of swellable mica, it is difficult to significantly increase the rain noise reduction effect in the temperature range of the roofing material. The content of trioctylmethylammonium chloride is preferably 100 parts by mass or less with respect to 100 parts by mass of the swellable mica from the viewpoint of maintaining good moldability of the vibration damping material for roof.

  For example, a damping property imparting component, a filler, a flame retardant, a colorant, an antioxidant, an antistatic agent, a stabilizer, a foaming agent, a lubricant, and the like can be added to the vibration damping material for roof as necessary. Examples of the vibration damping component include at least one compound selected from a benzothiazyl compound, a benzotriazole compound, a diphenyl acrylate compound, a normal phosphate ester compound, and an aromatic secondary amine compound. Examples of fillers include non-swelling mica, calcium carbonate, talc, clay, barium sulfate, magnesium carbonate, glass, silica, aluminum oxide, aluminum, aluminum hydroxide, iron, titanium oxide, iron oxide, diatomaceous earth, zeolite, and ferrite. Etc.

  The vibration damping material for roof can be prepared by mixing a thermoplastic polymer material, swellable mica, trioctylmethylammonium chloride and the like using a known mixing means. And the damping material for roofs is shape | molded in shapes, such as a sheet form and a block shape, according to the shape of a roof material, the surrounding structure of the installation location of a roof material, etc., for example. The roof damping material molded into a predetermined shape is located at a location where vibration of the roofing material can be suppressed. The rain noise reduction effect of the damping material for roof is shown by the loss factor and its temperature dependence. That is, it is shown that the higher the loss factor of the damping material for roof is, the better the rain noise reduction effect is. Furthermore, the smaller the variation of the loss factor in the temperature range of the environment where the damping material for roof is used, the lower the temperature dependency of the rain noise reduction effect. The loss factor can be measured by a known central excitation method loss factor measuring device.

Next, a roof structure using the roof damping material will be described.
As shown in FIG. 1, the roof structure has a configuration in which a sheet-like roof damping material 12 is laminated on a metal roof material 11. As a metal which comprises the roofing material 11, steel, stainless steel, an aluminum alloy, a zinc alloy, copper, titanium etc. are mentioned, for example. The roof material 11 may be plated with various metals. The metal roof having the above-described roof structure is formed by a method such as a folded plate, a tile rod, a vertical flat, a flat plane, a horizontal plane, or a metal tile.

  The roof damping material 12 is laminated on the back surface of the roofing material 11 when the surface of the roofing material 11 exposed to rain is the surface. In order to fix the roof damping material 12 to a predetermined location of the roofing material 11, the roof damping material 12 may be bonded to the predetermined location by providing an adhesive layer. You may make it adhere to a predetermined location by mix | blending an adhesive.

  The building having the above-described roof structure is not particularly limited, and examples include a warehouse, a factory, a parking lot, a bicycle parking lot, a gymnasium, an arcade, a temple, a shrine, and a general house. The metal roofing material 11 is advantageous in that the weight of the roof can be reduced as compared with a roofing material such as clay tile. Moreover, the rain sound generated by the metal roofing material 11 can become noise in the vicinity of the building in addition to noise in the lower part of the roofing material 11 (for example, inside the building). That is, since the roof material 11 vibrates when raindrops collide with the roof material 11 during rainfall, noise can be generated around the roof material 11. For this reason, for example, in the area where houses are densely packed, the area where parking lots and houses are crowded, etc., the above roof structure is advantageous in that noise is suppressed in the vicinity of the building including the roofing material 11.

  Here, the metal roofing material 11 tends to change easily due to the environmental temperature or the like. Such a temperature change of the roof material 11 changes the temperature of the vibration damping material 12 for the roof. In this regard, the roof damping material 12 of the present embodiment contains trioctylmethylammonium chloride in addition to the swellable mica, so that the affinity between the thermoplastic polymer material and the swellable mica is increased. The adhesion between the thermoplastic polymer material and the swellable mica is presumed to be difficult to decrease even if the temperature of the vibration damping material 12 for the roof changes. Thereby, it can be estimated that the temperature dependence about the damping performance of the damping material 12 for roofs becomes small. That is, even if the roof damping material 12 changes in temperature as the temperature of the roofing material 11 changes, the damping performance of the roof damping material 12 is unlikely to decrease.

The effects exhibited by this embodiment will be described below.
(1) The vibration damping material 12 for roof contains a thermoplastic polymer material, swellable mica and trioctylmethylammonium chloride. For this reason, even if the roof damping material 12 changes in temperature as the temperature of the roofing material 11 changes, the damping performance of the roof damping material 12 is unlikely to deteriorate. Therefore, according to the damping material 12 for roof of this embodiment, even if the temperature of the roofing material 11 changes, it becomes easy to reduce rain sound.

  (2) The content of the swellable mica is preferably in the range of 10 to 150 parts by mass with respect to 100 parts by mass of the thermoplastic polymer material. Thereby, it becomes easy to maintain the moldability of the damping material 12 for roofs suitably, and to raise significantly the rain noise reduction effect.

  (3) The content of trioctylmethylammonium chloride is preferably in the range of 10 parts by mass or more with respect to 100 parts by mass of swellable mica. Thereby, it becomes easy to remarkably enhance the effect of reducing rain noise in the temperature range of the roofing material 11.

  (4) If the roofing material 11 is less than 0 ° C., for example, it is highly likely that snow will be observed instead of rain. That is, for example, noise due to rain noise is generated in a range of 0 ° C. or higher. Therefore, it is preferable to configure the roof damping material 12 so that the loss coefficient value is the highest in the temperature range. In this regard, by including a chlorinated polyethylene-based thermoplastic elastomer as the thermoplastic polymer material, it becomes easy to adjust the temperature at which the value of the loss coefficient becomes the highest, for example, in the range of 0 ° C. or more. That is, it becomes easy to adjust the temperature range in which rain noise can be suitably reduced. As a result, it is possible to provide the roof damping material 12 that is excellent in the effect of reducing rain noise.

  (5) Since the chlorinated polyethylene thermoplastic elastomer is excellent in flame retardancy, the fire resistance of the building is easily maintained by including the elastomer as a base material of the vibration damping material 12 for roof. Moreover, since the chlorinated polyethylene thermoplastic elastomer is excellent in weather resistance, the secular change hardly occurs in the rain noise reduction effect.

  (6) The roof structure of the present embodiment has a configuration in which the roof damping material 12 is laminated on the metal roof material 11. According to such a roof structure, as described in the above section (1), it is easy to reduce rain sound even if the temperature of the roofing material 11 changes.

The embodiment may be modified as follows.
A metal foil such as an aluminum foil may be bonded to one surface of the sheet-shaped roof damping material 12, and a surface opposite to the metal foil may be laminated on the roof material 11. When comprised in this way, the restraint type | mold damping material for roofs which used metal foil as the restraint layer can be provided.

  The roof damping material 12 may be laminated on the entire surface of the roof material 11 or may be partially laminated on the surface of the roof material 11.

Next, the embodiment will be described more specifically with reference to examples and comparative examples.
Example 1
Chlorinated polyethylene thermoplastic elastomer (CPE: MR-104, chlorine content 40% by mass, Tg = 0 ° C., manufactured by Daiso Corporation), Na-type tetralithic fluorine mica (ME-100, manufactured by Coop Chemical Co., Ltd.) ) And 15 parts by mass of trioctylmethylammonium chloride (TOMAC) with a hot roll at 110 ° C. for 10 minutes to prepare a roof damping material.

(Comparative Example 1)
In Comparative Example 1, a roof damping material was prepared in the same manner as in Example 1 except that trioctylmethylammonium chloride was changed to benzyltributylammonium chloride (BTBAC).

  Table 1 shows the amount of each component in parts by mass.

＜損失係数の測定＞
各例の屋根用制振材を金型間に挟むとともにその金型をプレス機で加圧することにより、厚さ１ｍｍのシートに成形した。各例のシートを鋼板（厚さ０．８ｍｍ）に両面テープで貼り合わせることにより、試験片を作製した。中央加振法損失係数測定装置（ＣＦ５２００タイプ、小野測器（株）製）を用いて、加振の周波数１５０Ｈｚ、測定温度範囲０℃〜４０℃、昇温速度５℃／ｍｉｎの条件にて、各試験片の損失係数（η）を測定した。

<Measurement of loss factor>
The roof damping material of each example was sandwiched between molds and the molds were pressed with a press to form a 1 mm thick sheet. The test piece was produced by sticking the sheet | seat of each example to a steel plate (thickness 0.8mm) with a double-sided tape. Using a central excitation method loss factor measuring device (CF5200 type, manufactured by Ono Sokki Co., Ltd.), with a frequency of excitation of 150 Hz, a measurement temperature range of 0 ° C. to 40 ° C., and a temperature increase rate of 5 ° C./min. The loss coefficient (η) of each test piece was measured.

  FIG. 2 shows the relationship between temperature and loss factor for each example. As apparent from the results of FIG. 2, for example, in the range of 0 ° C. to 15 ° C. and the range of 30 ° C. to 40 ° C., the loss factor of Example 1 is maintained at a higher value than the loss factor of Comparative Example 1. It has been shown that That is, when the loss factor of Example 1 and the loss factor of Comparative Example 1 are compared for each temperature, they are equivalent at 15 ° C. and 20 ° C., but at other measurement temperatures, the loss factor of Example 1 is The value is higher than the loss factor of Comparative Example 1. Thereby, in the vibration damping material for roofs of Example 1, even if the temperature of a roof material changes, it turns out that the reduction effect of rain sound is easy to be exhibited.

The fragmentary sectional view which shows the roof structure of this embodiment. The graph which shows the relationship between temperature and a loss factor.

Explanation of symbols

  11 ... Roof material, 12 ... Damping material for roof.

Claims (5)

A roof damping material laminated on a metal roof material, comprising a thermoplastic polymer material, swellable mica, and trioctylmethylammonium chloride. The roof damping material according to claim 1, wherein the content of the swellable mica is in the range of 10 to 150 parts by mass with respect to 100 parts by mass of the thermoplastic polymer material. The roof damping material according to claim 1 or 2, wherein a content of the trioctylmethylammonium chloride is in a range of 10 parts by mass or more with respect to 100 parts by mass of the swellable mica. The roof damping material according to any one of claims 1 to 3, wherein the thermoplastic polymer material includes a chlorinated polyethylene-based thermoplastic elastomer. A roof structure comprising the roof damping material according to any one of claims 1 to 4 laminated on a metal roof material.

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