JPS61207746A - Vibration damping building material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a vibration-damping building material, and more particularly to a building material that is unaffected by environmental temperature changes and has excellent vibration-damping properties.

[Prior Art and Problems to be Solved by the Invention] Building materials such as flooring materials, wall materials, ceiling materials, etc. are required to have vibration damping properties that can control and attenuate various vibrations. As this vibration-damping building material, it has been known to have an uneven shape in which an intermediate layer is made of butyl rubber and both outer layers are made of steel plates. However, although this vibration-damping building material has a somewhat satisfactory vibration-damping property at room temperature, it has the disadvantage that the damping property deteriorates in a high-temperature environment.

[Means for solving problems]

Therefore, the present inventors investigated vibration-damping building materials that solved the above-mentioned drawbacks, and found that a building material that could achieve the purpose could be obtained by using a specific material for the intermediate layer.Based on this knowledge, the present invention was developed. Completed the invention.

That is, the present invention is a vibration-damping building material having a complementary uneven shape in which an intermediate layer is a composition consisting of a hydroxyl group-containing liquid diene polymer, a polyisocyanate compound, and a polyol compound, and both outer layers are formed of metal plates.

The composition forming the intermediate layer of the present invention comprises a hydroxyl group-containing liquid diene polymer, a polyisocyanate compound, and a polyol compound.

Here, the hydroxyl group-containing liquid diene polymer has a hydroxyl group in the molecule, preferably at the end of the molecule, and has a number average molecular weight of 300 to 300.
25,000, preferably 500 to 10,000. These liquid diene polymers include diene polymers and diene copolymers having 4 to 12 carbon atoms, and copolymers of these diene monomers and α-olefinic addition polymerizable monomers having 2 to 22 carbon atoms. be. The hydroxyl group content is usually 0.1 to 10 meq/g, preferably 0.
Approximately 3 to 5 meq/g is suitable. Specific examples include butadiene homopolymer, isoprene homopolymer, butadiene-styrene copolymer, butadiene-isoprene copolymer, butadiene-acrylonitrile copolymer, butadiene-2-ethylhexyl acrylate copolymer, butadiene-n-octadecyl acrylate copolymer, and the like. . These liquid diene polymers can be produced, for example, by subjecting a conjugated diene monomer to a heating reaction in a liquid reaction medium in the presence of hydrogen peroxide.

Moreover, a polyisocyanate compound is an organic compound having two or more isocyanate groups in one molecule, and has an isocyanate group reactive with the hydroxyl group of the hydroxyl group-containing liquid diene polymer. Examples of polyisocyanate compounds include common aromatic,
Aliphatic and cycloaliphatic ones may be mentioned, for example tolylene diisocyanate, hexamethylene diisocyanate, diphenylmethane diisocyanate (MDI).
), liquid modified diphenylmethane diisocyanate, polymethylene polyphenylisocyanate, xylylene diisocyanate, cyclohexyl diisocyanate, cyclohexane phenylene diisocyanate, naphthalene
1,5-diisocyanate, isopropylbenzene-2
, 4-diisocyanate, addition reaction products of polypropylene glycol and tolylene diisocyanate, and particularly preferred are MDl, liquid modified diphenylmethane diisocyanate, and tolylene diisocyanate.

Next, as a polyol compound, the molecular weight is 200 to 5.
00, specifically N.

N-bis-2-hydroxypropylaniline.

Examples include N,N'-bishydroxyisopropyl-2-methylpiperazine and a propylene oxide adduct of bisphenol A.

There are no particular restrictions on the blending ratio of the three components mentioned above. Usually, the molar ratio of the hydroxyl group (OH) of the hydroxyl group-containing liquid diene polymer to the isocyanate group (NGO) of the polyisocyanate compound is NC010H=0.2 to 2. 0
．． The ratio is preferably 0.3 to 1.5. If this ratio is less than 0.2 or exceeds 2.0, a cured product cannot be obtained, which is not preferable. The polyol compound is blended in an amount of 5 to 200 parts by weight, preferably 10 to 100 parts by weight, per 100 parts by weight of the -hydroxyl group-containing liquid diene polymer.

The intermediate layer of the present invention basically consists of the above three components, but various additives can be added as necessary. In particular, polyamine compounds are preferably used as the reinforcing agent.

Here, the polyamine compound is not particularly limited and may be any of diamine, triamine, and tetramine. Furthermore, any of primary polyamine, secondary polyamine, and tertiary polyamine can be used. Examples of polyamine compounds include aliphatic amines such as hexamethylene diamine; alicyclic amines such as 3+3'-dimethyl 4,4'-diaminodicyclohexylmethane; aromatic amines such as 4+4"-diaminodiphenyl; 2.4.6 -The amount of the reinforcing agent, which can include tetramine such as tri(dimethylaminomethyl)phenol, is usually 1 to 1000 parts by weight per 100 parts by weight of the hydroxyl group-containing liquid diene polymer.
Parts by weight, preferably 3 to 200 parts by weight.

In addition, plasticizers such as dioctyl phthalate are added as viscosity modifiers, as well as aromatic and naphthenic agents.

In addition to adding softeners such as paraffin oil, we also use alkylphenol resins, terpene resins, terpenephenol resins, xylene formaldehyde resins, rosin, hydrogenated rosin, coumaron resins,
Tackifying resins such as aliphatic and aromatic petroleum resins can also be added.

Furthermore, a curing accelerator such as dibutyltin dilaurate, stannous octoate, polyethylene diamine, etc. can also be added. Furthermore, an anti-aging agent can be added to improve weather resistance, and a silicon compound or the like can be added as an antifoaming agent.

In addition, mica, graphite, vermiculite, calcium carbonate, slate powder, feldspar, silicic acid, white glaze, etc. can be added as fillers.

The intermediate layer of the present invention is manufactured by blending and kneading the above raw materials. The kneading may be carried out by any commonly used method, specifically by a mixing type casting machine or the like. When using a mixing type casting machine, the crosstalk conditions are a temperature of 0 to 1.
The temperature is 50°C, preferably 10 to 120°C, for 0.1 seconds to 1 hour, preferably 0.5 minutes to 10 minutes.

Next, as the metal forming both outer layers, steel plates are generally used, but aluminum plates, copper plates, etc. can also be used.

The desired vibration-damping building material is obtained by laminating the above layers. Here, various methods can be applied as a lamination method, but the general method is to inject the above composition to form an intermediate layer between the metals forming both outer layers, and then pass it between a pair of pressure rolls. This is a method of applying pressure and hardening. This curing should be done at room temperature <0.
It hardens by standing for 1 to 24 hours. Then 3
0-150℃, preferably 0.1-2 at 40-120℃
Heat cure for 4 hours, preferably 0.5 to 10 hours.

Next, press processing is performed to form a complementary uneven shape (i.e., a continuous shape in which concave portions and convex portions are alternately repeated as shown in the figure).
Manufacture vibration-damping building materials with

Typical examples of press working include the de-tsuki plate process shown in FIG. 1(a) and the keystone process shown in FIG. 1(b).

The thickness of each layer constituting the vibration-damping building board of the present invention may be appropriately determined in consideration of the purpose of use, etc., but generally the middle layer is 20 to 300 μm, preferably 30 to 200 μm, and both outer layers are each from 0.01 to 10 m, preferably 0.0 m
The length should be 5-5m. Note that both outer layers may have the same thickness or may have different thicknesses. In addition, the height (H) of the concave and convex portion that is continuously repeated is 35 to 100 fl, preferably 50 to 80 m, and the width (W, ) of the concave portion in the case of deck plate processing is 40 to 110 m, preferably 50 to 8 m.
The appropriate width (W2) of the convex portion is 20 to 60 tl, preferably 30 to 50 m. On the other hand, in the case of keystone processing, the width of the concave portion (W) and the width of the convex portion (W2) are generally both 30 to 120 WIA, preferably 50 to 100 WIA.

[Effects of the Invention] Due to the use of a specific composition as the intermediate layer, the thus obtained building material is almost unaffected by temperature changes and has excellent vibration damping properties. Moreover, the adhesion between each layer is also good.

Therefore, the vibration-damping building material of the present invention is suitable for flooring and wall materials.

It is extremely effectively used as ceiling material, etc.

〔Example〕

Next, the present invention will be explained in detail with reference to Examples.

Examples 1 to 4 Each component shown in Table 1 was blended in a predetermined amount and kneaded using a mixing molding machine under the conditions shown in Table 1 to obtain a composition to become an intermediate layer.

Next, this composition was supplied between two steel plates having a thickness of 1.2 mm at 25° C., and then passed through a pressure roll to be laminated and hardened. The obtained laminate was left at room temperature for 2 hours to harden the intermediate layer, and was further heated and cured at 70° C. for 2 hours. Then,
A building material as shown in FIG. 2 was manufactured by processing the deck plate. The specifications of this building material are as follows.

Thickness of both outer layers: 0.8μ each Thickness of middle layer: 100μ Height (H): 50m Width of concave part (W+): 75 x m Width of convex part (Wz): 40 Tsuru This building material was controlled by the resonance method. The vibration properties were evaluated and the loss coefficients at each temperature are shown in Table 1.

Comparative Example 1 A building material was produced in the same manner as Examples 1 to 4 except that butyl rubber was used for the intermediate layer. The results are shown in Table 1.

*1... Manufactured by Idemitsu Petrochemical ■, rR-45HTJ number average molecular weight 2800, hydroxyl group content 0.79 meq/g *2
...Isocyanate fund amount 28.2% by weight*3...
Propylene oxide adduct of bisphenol A (manufactured by Nippon Nyukazai ■, rBAP-3J) *4...N, N-bis-
2-Hydroxypropylaniline (manufactured by Kasei Upjin ■, rl5onol C-10
0J)*5...Dioctyl phthalate*6...2.2'-methylenebis(4-methyl-6-
t-butylphenol) *7... Pentaerythrityl-tetrakis [(3,5
-di-t-butyl-4-hydroxyphenyl)propionate] *8...2-(3,5-di-t-butyl-2-hydroxyphenyl)-5-chlorobenzotriazole*9...dibutyltin dilaurate *io...Made by Japan Synthetic Rubber ■, rJSRButye
065 J*11...Measured by resonance method

[Brief explanation of drawings]

FIGS. 1(a) and 1(b) are partial front views of an example of the vibration-damping building material of the present invention, and FIG. 2 is a partial enlarged sketch of the type of building material shown in FIG. 1(a). 1... Middle layer, 2.2'... Outer layer Patent applicant Idemitsu Petrochemical Co., Ltd. Nisshin Steel Co., Ltd. Figure 1 (Q)
(b) Diagram 2 Procedures (Ho Shoji (voluntary) April 23, 1985

Claims (1)

[Claims] A vibration-damping building material having complementary uneven shapes in which an intermediate layer is made of a composition consisting of a hydroxyl group-containing liquid diene polymer, a polyisocyanate compound, and a polyol compound, and both outer layers are made of metal plates.