JP2881490B2 - Soundproofing / damping material - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a polyurethane material having both soundproofing and vibration-damping properties. More specifically, the present invention relates to a polyurethane material having a large amount of an aromatic phosphoric acid ester. The present invention relates to a polyurethane soundproofing / damping material having significantly improved vibration performance.

[Conventional technology and its problems] In recent years, especially in urban areas, houses are becoming denser and more complex, and due to daily noise generated from neighboring houses, troubles are occurring on a daily basis. In a house close to a railway, not only traffic noise is generated, but also vibration caused by passing of a vehicle is a problem.

In addition, there is a problem that noise or vibration generated from machinery or various office equipment in a factory deteriorates the working environment.

For this reason, conventionally, measures such as installing a sound absorbing panel on a wall surface and / or a ceiling surface of a house, covering machinery and office equipment with a sound absorbing material, or installing an enclosure have been taken. I was

Examples of the soundproofing / damping material used for such a purpose include, for example, a material obtained by binding a large amount of an inorganic filler to a polymer material as described in JP-A-61-190547,
Synthetic resin foams such as polyurethane foam as described in JP-A-61-190547 are known, but these conventionally known materials have various disadvantages and are practically satisfactory. Was not. For example, a material in which an inorganic filler is blended with a polymer material has a drawback in that not only is the weight per unit volume large and inconvenient to handle, but also the soundproofing performance is small. Although there is an advantage, the vibration energy absorption capacity is small, so it is not enough to reduce noise accompanied by mechanical vibration, and since these materials are all flammable, from the viewpoint of fire protection, It was not satisfactory.

[Means for solving the problem]

In view of this situation, the present inventors have conducted intensive studies to find a material that is excellent in soundproofing and vibration damping performance and is lightweight and nonflammable. It has been found that a gel-like substance obtained by reacting in the presence of a compound has excellent soundproofing and vibration-damping properties, and is lightweight and nonflammable.

That is, the present invention relates to a soundproofing and vibration-damping material obtained by reacting an organic polyisocyanate and a polyol in the presence of an aromatic phosphate, wherein the aromatic phosphate is a total amount of the organic polyisocyanate and the polyol.
It is intended to provide a soundproofing / damping material characterized by using 200 to 1000 parts by weight with respect to 100 parts by weight.

Hereinafter, the present invention having the above gist will be described in more detail.

The organic polyisocyanate and polyol used in the present invention are not particularly limited, and those usually used for producing polyurethane can be used as they are.

Examples of such an organic polyisocyanate include tolylene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, naphthalene diisocyanate, meta-xylylene diisocyanate, dianisidine diisocyanate, triphenylmethane triisocyanate, and the like. One or two or more can be used.

Examples of the polyol include polyoxypropylene glycol, polyoxyethylene glycol, poly (oxyethylene / oxypropylene) glycol, polyoxybutylene glycol, polyoxytetramethylene glycol, polyoxypropylene triol, and poly (oxyethylene / oxypropylene) triol. Polyether polyol having a hydroxyl group at a terminal obtained from polybasic acids such as adipic acid and phthalic acid and diols and / or triols; and ethylene glycol, propylene glycol, tetramethylene glycol, hexamethylene glycol, and glycerin. , Trimethylolpropane, pentaerythritol, acrylic polyol, castor oil derivatives, tall oil derivatives, and the like. Others may be used two or more kinds.

Examples of the aromatic phosphate used in the present invention include triphenyl phosphate, tricresyl phosphate, trixylyl phosphate, tris (polyisopropylated phenyl) phosphate, mixed phenyl cresyl phosphate, and tetraphenyl resorcin bisphosphate. And the like, and one or more of these can be used.

The amount of these aromatic phosphates used is 200 to 1000 parts by weight, more preferably 300 to 800 parts by weight, based on 100 parts by weight of the total amount of the organic polyisocyanate and the polyol. If the amount used is less than 200 parts by weight, the soundproofing / damping performance and flame retardancy of the obtained material are insufficient, and if the amount exceeds 1000 parts by weight, the obtained material becomes Not only is the soundproofing / damping performance inadequate, but also its strength is significantly reduced, which is not preferable.

The soundproofing and vibration damping material of the present invention is produced by preparing a mixture of the organic polyisocyanate, polyol and aromatic phosphate having the above composition, adding a catalyst thereto, and curing the mixture. By adjusting the temperature, it is possible to cure without heating.

Further, the soundproofing and vibration damping material of the present invention can be formed into any shape. For example, a wall material, a ceiling material, a floor material or the like having a hollow or void or a concave portion is manufactured, and an organic polymer is formed there. By injecting and curing a mixture of an isocyanate, a polyol, an aromatic phosphate ester and a catalyst, a wall material, a ceiling material, a floor material and the like having a direct soundproofing / damping performance can be manufactured. Materials such as wall materials, ceiling materials, floor materials, etc. are made of inorganic materials such as metal, concrete, gypsum board, glass and ceramics, and natural or synthetic organic materials such as wood, paper, plastic, asphalt and carbon fiber. Any of the composites are useful.

Further, it is also possible to inject the mixture into a mold having an arbitrary shape, remove the mixture from the mold after curing, and sandwich it between two plates to produce a soundproofing / damping panel or the like.

Further, it is possible to further improve the soundproofing / damping performance of the soundproofing / damping material of the present invention by blending various fillers. In this case, conventionally known fillers can be used without any particular limitation, and the filler may be the organic polyisocyanate, polyol and aromatic phosphate ester. It must be blended before the mixture cures.

In addition, when producing the soundproofing / damping material of the present invention, an antioxidant, a heat stabilizer, a dispersant, a dye and the like can be added as necessary.

[Examples] Next, the present invention will be specifically described with reference to Examples. However, the invention is not limited by these examples.

Example 1 15% by weight of tolylene diisocyanate, 10% by weight of ADEKA POLYER P-2000 (manufactured by Asahi Denka Kogyo KK: polypropylene glycol having a molecular weight of about 2,000), and ADEKA POLYETHER G-3000 (Asahi Denka Kogyo KK) 20% by weight of glycerin having a molecular weight of about 3000 and propylene oxide G-4000 (made by Asahi Denka Kogyo Co., Ltd .: propylene oxide adduct of glycerin having a molecular weight of about 4000) 55
100 parts by weight of an organic polyisocyanate / polyol mixture consisting of 20% by weight and 20 parts by weight of rheophos 65 (manufactured by Ajinomoto Co., Inc .: tris (polyisopropylated phenyl) phosphate)
0 parts by weight were mixed. Separately, a catalyst solution was prepared by dissolving 5 parts by weight of diaminodiphenylmethane and 1.5 parts by weight of 4,4'-methylenebis-2-chloroaniline in 300 parts by weight of Leophos 65, and prepared the above-mentioned organic polyisocyanate / polyol / aromatic phosphorus. The mixture was thoroughly mixed with the acid ester mixed solution.

Two plywood sheets each having a thickness of 5 mm were adjusted so that the gap became 3 mm, and the above-mentioned mixed solution was injected into the gap. After standing overnight, it was confirmed that the injected mixed solution was completely gelled.

In order to examine the soundproofing properties of the soundproofing board of the present invention, the soundproofing board of the present invention (example of the present invention) and a board not filled with a gel-like soundproofing / damping material (comparative example) were used as partition boards, and each frequency (Hz : Hz).

 Table 1 shows the results.

Examples 2 to 6 and Comparative Example 2 By changing the type and amount of the aromatic phosphate ester as described below, a soundproofing / damping material was prepared by the same operation as in Example 1, and the sound transmission loss was measured.

 Table 2 shows the results.

[Effects of the Invention] As is clear from the results of the above examples, the polyurethane-based soundproofing and vibration-damping material of the present invention containing a large amount of an aromatic phosphate ester has a wide frequency range, particularly, at 1500 to 4000 Hz. It is clear that the sound transmission loss is large and the soundproofing properties are excellent.

Claims (1)

(57) [Claims] 1. A soundproofing / damping material obtained by reacting an organic polyisocyanate and a polyol in the presence of an aromatic phosphate, wherein the aromatic phosphate is converted to a total amount of 100 parts by weight of the organic polyisocyanate and the polyol. A soundproofing and vibration damping material characterized by using 200 to 1000 parts by weight based on parts by weight.