JPH02289757A - Sound insulating floor - Google Patents

Abstract

PURPOSE:To improve sound insulating property, compression-resisting fatigue property, and workability by interposing a hydroxyl group-containing liquid diene polymer or a hardened body of liquid polymer composite between a floor material and a bed surface. CONSTITUTION:A liquid polymer composite forming a hardened body is formed of hydroxyl group-containing liquid diene polymers or hydroxides thereof, polyisocyanate compounds, and shortened polyol compounds. The hydroxyl group-containing liquid diene polymer is formed of a liquid polymer containing hydroxyl group in the molecular chain or on the molecular chain terminal and having a number average molecular weight of 300-25,000. The liquid diene polymer is selected from diene polymers and diene copolymers having 4-12 carbon atoms, and copolymers of these diene monomers with alpha-olefinic addition polymerizing monomers having 2-22 carbon atoms. In a direct stuck floor, the liquid polymer composite is applied to a desired height from the bed surface to the floor material and hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sound insulating floor, and more particularly to a sound insulating floor that has excellent sound insulating properties and compression fatigue resistance, and is easy to install.

[Problem to be solved by conventional techniques and inventions] Floors of buildings, especially floors of apartment complexes, gymnasiums, etc., and floors of large spaces such as large halls, transmit impact sounds and vibrations sensitively. This causes people to feel very uncomfortable, so a floor with excellent sound insulation is required. Floor structures with this kind of performance include floating floors and directly pasted floors.
Placement beds, etc. have been known for a long time. Regarding the flooring, it is known that natural rubber or synthetic rubber is interposed between the base and the support of the flooring material (Japanese Patent Application Laid-Open No. 82-258054), but this flooring has satisfactory sound insulation properties. It was not up to the standard, and the leveling adjustment using the support was complicated. On the other hand, for direct flooring, hydroxyl group-containing liquid polybutadiene is used. A floor is known in which a cured product of a liquid polymer composition consisting of a polyisocyanate compound and a long-chain polyol compound such as polyoxybrobylene glycol is interposed between a base and a flooring material (Japanese Patent Laid-Open No. 61-2066).
Publication No. 40). Although this floor showed some improvement in sound insulation, it was still not sufficient, and it also had the disadvantage of being highly fatigued by compression. An object of the present invention is to provide a sound insulating floor that eliminates such conventional drawbacks.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the inventor of the present invention has conducted various studies on the M-shock agent to be interposed between the flooring material and the base surface.
It has been discovered that by using a cured product of a liquid polymer composition consisting of a specific liquid polymer, a polyisocyanate compound, and a specific polyol compound, a floor with excellent sound insulation and compression fatigue resistance can be obtained, and the present invention We have now completed the . That is, the present invention is characterized in that a cured product of a liquid polymer composition consisting of a hydroxyl group-containing liquid diene polymer or its hydride, a polyisocyanate compound, and a short-chain polyol compound is interposed between the flooring material and the underlying surface. This provides a sound insulating floor that provides sound insulation. The present invention will be explained in detail below.

In the present invention, the liquid polymer composition serving as the cured product interposed between the flooring material and the underlying surface comprises a hydroxyl group-containing liquid diene polymer or its hydride, a polyisocyanate compound, and a short polyol compound.

In the above liquid polymer composition, the hydroxyl group-containing liquid diene polymer is a liquid diene polymer having a hydroxyl group inside the molecule or at the end of the molecular chain and having a number average molecular weight of 300 to 25,000, preferably 500 to 10,000. Here, the content of hydroxyl groups is usually o. 1-1 omeq/g. Preferably it is 0.3 to 7 meq/8.

Examples of the liquid diene polymer 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. There is. Specifically, butadiene homopolymer, isobrene homopolymer, butadiene-styrene copolymer, chloroprene homopolymer, butadiene-isobrene copolymer. Butadiene-acrylonitrile copolymer, butadiene-2-ethylhexyl acrylate copolymer. Examples include butadiene-n-octadecyl acrylate copolymer. These liquid diene polymers can be produced, for example, by subjecting military diene monomers to a heating reaction in the presence of hydrogen peroxide in a liquid reaction medium.

Furthermore, in the present invention, a hydride thereof can be used instead of the hydroxyl group-containing liquid diene polymer. The hydrogenated product of the hydroxyl group-containing liquid diene polymer is prepared by dissolving the hydroxyl group-containing liquid diene polymer in a solvent and heating the mixture at a temperature of 20 to 300 ml in the presence of a known hydrogenation catalyst such as nickel, palladium, or ruthenium-9 platinum. °C, preferably 30~
At 200℃, hydrogen pressure O N200kg/cs2
G, preferably 0 to 100 kg/cm"G and o.i to
It can be carried out by reacting for 10 hours. After the reaction is completed, the catalyst is separated and the solution is distilled under reduced pressure to remove the solvent and obtain a hydride of a liquid diene polymer containing hydroxyl groups. The hydrogenated product of the hydroxyl group-containing liquid diene polymer has a number average molecular weight of 300 to 25,000, preferably 500 to io. ooo, and the hydroxyl group content is 0.1 to 10a+eq/g, preferably 0.3 to 7L
Ileq/g is desirable.

Next, the 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 this polyisocyanate compound include common aromatic compounds. Mention may be made of aliphatic and cycloaliphatic ones, for example tolylene diisocyanate (TDI). Hexamethylene diisocyanate, diphenylmethane diisocyanate (MDI), carbodiimide-modified diphenylmethane diisocyanate. Polymethylene polyphenylisocyanate. Xylylene diisocyanate (XDI)
, transcyclohexane-1,4-diisocyanate, phenylene diisocyanate, naphthalene-1,5-
Diisocyanate + ot-luidine diisocyanate. Lysine diisocyanate, triphenylmethane triisocyanate, tris(phenyl isocyanate)
Thiophosphate. Tetramethylxylene diisocyanate, lysine ester triisocyanate, 1,6.
11-Undecanetriisocyanate}, 1,8-diisocyanate-4-isocyanate methyloctane, 1
, 3.6-hexamethylene triisocyanate. Bicyclohebutane triisocyanate. Isobrobylbenzene-2,4-diisocyanate. Trimethylhexamethylene diisocyanate. Isophorone diisocyanate (I
PDI), hydrogenated diphenylmethane diisocyanate, hydrogenated xylylene diisocyanate 5, cyclized trimer (isocyanurate modified product) of the above polyisocyanate compound, and ethylene glycol 5 trimethylolbroban. Polyether polyol, polymer polyol. Polytetramethylene ether glycol, polyester polyol, acrylic polyol, polyalkadiene polyol, partially oxidized ethylene-vinyl acetate copolymer. An addition reaction product of a polyisocyanate compound such as a castor oil-based polyol and the above-mentioned polyisocyanate compound is used. Especially MDI, carbodiimide modified diphenylmethane diisocyanate. TDI etc. are preferred. Moreover, these polyisocyanate compounds can also be used as a mixture of two or more types, and the isocyanate groups of these polyisocyanate compounds can be mixed with phenol. It is also possible to use so-called blocked isocyanate compounds blocked with blocking agents such as xylenol, methyl ethyl ketone oxime, and ε-1-cubic lactam.

There is no particular restriction on the blending ratio of the hydroxyl group-containing liquid diene polymer or its hydride and the polyisocyanate compound, but usually the polyisocyanate relative to the hydroxyl group (OH) of the hydroxyl group-containing liquid diene polymer or its hydride is The proportion of isocyanate groups (NGO) in the compound (NCO/O) is mixed so that the molar ratio is 0.5 to 25, preferably 0.5 to 15.Furthermore, as a short chain polyol compound, a primary polyol is used. Any of .secondary polyol and tertiary polyol may be used.Specifically, for example, 1,2-brobylene glycol, dipropylene glycol, 1,2-butanediol, 1,3-butanediol,2,3 -butanediol, 1,2-pentanediol, 2,3-pentanediol, 2,5-hexanediol, 24-hexanediol.2-ethyl-1.
3-hexanediol, cyclohexanediol. N
．． N-bis-2-hydroxybrobylaniline, N,
Examples include polyols containing a hydrogen group bonded to at least one primary carbon, such as N'-bishydroxyisobrobyl-2-methylbiverazine and a brobylene oxide adduct of bisphenol A. Additionally, trimethylolbroban. Examples include short chain triols such as glycerin and brobylene oxide adducts of glycerin. The molecular weight of the short chain polyol compound is 50 to 500.
It is in the range of . The blending ratio of the short daughter polyol compound is not particularly limited, but usually the hydroxyl group-containing liquid diene polymer or its hydride is 100! 0 for quantity parts
．． 1 to 100 parts by weight, preferably 0.5 to 50 parts by weight. In the present invention, the liquid polymer composition serving as the cured product interposed between the flooring material and the underlying surface is composed of the above-described hydroxyl group-containing liquid diene polymer or its hydride, a polyisocyanate compound, and a short-chain polyol compound. However, this liquid polymer composition may optionally contain a polyamine compound, an inorganic filler. Other additives may be added. The polyamine compound may be any of diamine, triamine, and tetraamine. Furthermore, primary polyamines, secondary polyamines. Any tertiary polyamine can be used. Examples of polyamine compounds include aliphatic amines such as hexamethylene diamine. 3. Alicyclic amines such as 3'-dimethyl 4,4'-diaminodicyclohexylmethane; 4. Aromatic amines such as 4'-diaminodiphenyl; 2,4,II-tri(dimethylaminomethyl)phenol, etc. Examples include tetramine. There is no particular restriction on the blending ratio of the polyamine compound, but it is usually 1 to 1 part per 100 1i parts of the above-mentioned hydroxyl group-containing liquid diene polymer or its hydride.
000 parts by weight, preferably 3 to 200 parts by weight. Zinc is an inorganic filler. Asbestos, alumina, aluminum. Kaolin, clay, glass spheres. Glass flakes, carbon (channel black, furnace black, acetylene black, thermal black), nepheline, cryolite, graphite, silica, wollastonite, diatomaceous earth. Zinc oxide, magnesium oxide, zirconium oxide, titanium oxide, iron oxide, aluminum hydroxide, slate powder. Zeolite, quartz powder. Calcium carbonate. Magnesium carbonate, talc. Potassium titanate, boron nitride. Feldspar powder, copper, nickel, molybdenum disulfide, barium sulfate,
Whiting, waxite clay. Examples include mica and gypsum. There is no particular restriction on the amount of the inorganic filler, but it is usually 1 to 50 parts by weight per 100 parts by weight of the hydroxyl group-containing liquid diene polymer or its hydride.
0 parts by weight, preferably 10 to 200 parts by weight.

As other additives added as desired, a plasticizer such as dioctyl phthalate may be added as a viscosity modifier,
Aroma type. Softeners such as naphthenic and paraffin oils are added, and alkylphenol resins are used to adjust adhesive strength and adhesion. Terben resin, Terben phenol resin. Xylene formaldehyde resin, rosin monohydrogenated rosin, coumaron resin. Tackifying resins such as aliphatic and aromatic petroleum resins can also be added. Also, dibutyltin dilaurate. Curing accelerators such as stannous octoate and polyethylene diamine may also be added. Furthermore, an anti-aging agent can be added to improve weather resistance, and red phosphorus, hexabromobenzene, etc. can be added as a flame retardant imparting agent.

The liquid polymer composition that becomes the hardened material interposed between the flooring material and the underlying surface is formulated with the above ingredients. Obtained by mixing. As a method for preparing a liquid polymer composition, the above components excluding the polyisocyanate compound are usually first blended, and the mixture is heated at 15 to 120°C, preferably 70 to 100°C, for 5 to 240 minutes, preferably 30 to 100°C. Stir and mix for 180 minutes, then add the polyisocyanate compound to this mixture at 0 to 70 °C, preferably 15 to 50 °C to 0.5 °C.
A liquid polymer composition is obtained by stirring and mixing for 1 to 180 minutes, preferably 1 to 120 minutes. There are no particular restrictions on the conditions for curing the liquid polymer composition obtained as described above, but usually 0 to 120°C;
Preferably at 15 to 70°C for 0.5 to 75 hours, preferably 1 to 72 hours. Further, the thickness of the cured product (the height from the base surface to the flooring material) may be determined by considering the desired mechanical strength, etc., and is usually determined by O. S to 400 ms%, preferably about 1 to 250 ms is sufficient.

As the flooring material for the sound insulating floor of the present invention, various materials and shapes can be used, and the material may be selected as appropriate depending on the intended use. Examples of materials include vinyl chloride resin, ceramics, composite materials, and decorative plywood. Terrazzo, enamel. Slate, asbestos slate, wood wool cement, pulp cement. There are various types such as wood chip cement, gypsum, asbestos cement, and glass fiber reinforced polyester. Also,
Shapes include square and rectangular flat plates, as well as single-sided flat plates. Flat boards with double-sided chamfers, boards with an L-shaped cross section called curved boards, and board materials of various shapes called inner baseboards, inner baseboards with one side, inner baseboards with one side taken out, inner baseboards with one side, etc. Alternatively, various materials such as members for stairs can be mentioned.

The construction of the sound insulating floor of the present invention is basically an on-site construction type. In other words, it is constructed using the following procedure. 1. In the case of a directly pasted floor (1) Remove and clean any dirt adhering to the subsurface.

(2) Apply the liquid polymer composition to the desired height from the subsurface to the flooring material.

(3) After coating, the flooring material is placed on the coated surface and left for hardening.

2. In the case of a standing floor (1) Remove any dirt, etc. that has adhered to the base surface. to clean up.

(2) Pour the liquid polymer composition into the formwork to the desired height from the subsurface to the flooring material.

(3) After curing by leaving it as it is, remove the formwork.

(4) Apply an adhesive between the molded cured body and the flooring material, and attach the flooring material.

[Examples] Next, the present invention will be explained in more detail with reference to Examples and Comparative Examples.

Production example l Liquid polybutadiene having a hydroxyl group at the end of the molecule (manufactured by Idemitsu Atochem ■, R-45117, number average molecular weight 2110
0, hydroxyl group content o. 79meq/g) 100g
．． 100g of cyclohexane and 10g of 5% nickel catalyst were placed in an autoclave, and the temperature was 140°C.
The mixture was stirred for 4.5 hours at a hydrogen pressure of 50 kg/cm'G. After the reaction, the contents were taken out from the autoclave and the catalyst was filtered through a 0.45 μm membrane filter.
The solution was filtered through a door, and the solvent was distilled off at 110° C. under a reduced pressure of 2 auaHg to obtain a hydrogenated liquid polyptadiene having a hydroxyl group at the end of the molecular chain. The bromine number of this product was 1 or less, and the number average molecular weight was 2,850. Moreover, the hydroxyl group content is o. It was 7ameq/g. Production example 2 Isobrene 200 in a 1k capacity stainless steel pressure-resistant reaction vessel
g, 16 g of 50% by weight hydrogen peroxide solution and 100 g of n-butyl alcohol, and heated at 120°C for 2 hours.
The polymerization reaction was carried out under stirring for a period of time. Reaction pressure up to 8 kg
/cm2G. After the reaction, the reaction product was cooled to room temperature and taken out from the reaction vessel.
00g&: After addition and mixing, the mixture was sufficiently shaken and then left to stand at room temperature for 3 hours. The separated oil layer was heated for 2 ma at a temperature of 100°C.
The mixture was evaporated for 2 hours under a vacuum of +llg to remove volatile solvents, isobrene, low-boiling components, etc., and a liquid polyisobrene having a hydroxyl group at the end of the molecular button was obtained as a residue with a yield of 68%.

This liquid polyisoprene had a number average molecular weight of 2150, a hydroxyl group content of 0.95 meq/g, and a viscosity of 62 poise/30°C.

Production Example 3 Long liquid polyisobrene having a hydroxyl group at the end of the molecular chain produced in Production Example 2, long cyclohexane
g, 10 g of a nickel catalyst with a concentration of 5% by weight was placed in an autoclave, and the hydrogen pressure was 50 kg at a temperature of 140°C.
/cm'G and stirred for 4.5 hours. After the reaction is complete,
Remove the contents from the Saiichi crepe and filter the catalyst through a 0.45 μ membrane filter, and dilute the solution with 2
The solvent was distilled off at 110° C. under a reduced pressure of a+mHg to obtain a hydride of liquid polyisoprene having a hydroxyl group at the end of the molecular chain. The bromine number of this hydride is 1 or less, the number average molecular weight is 2210, and the hydroxyl group content is 0.94 meq/g.
Met.

Examples 1 to 5 and Comparative Examples 1 to 2 Predetermined amounts of the components shown in Table 1 except for the polyisocyanate compound were blended and mixed with stirring for 30 minutes at IOO°C. A liquid polymer composition was prepared by stirring and mixing at 25° C. for 5 minutes.

Using this liquid polymer composition, a directly attached floor and a laid floor were produced according to the construction method described above. The base at this time is a concrete slab, and the flooring material is 1818 in length x 30 in width.
It was made of plywood (5 pieces) with a thickness of 0X and 15ms. The sound insulation properties of the floor thus obtained and the adhesive properties of the liquid polymer composition used were evaluated and evaluated by the following methods. In addition, the same liquid polymer composition as above was separately prepared, and this liquid polymer composition was poured into a mold and heated at 120°C for 60 minutes.
Compression fatigue properties of the cured bodies obtained by press hardening under the conditions of kg/c+a2G were evaluated by the following method. The results of these evaluations are shown in Table 1. Sound insulation property> In order to evaluate the sound insulation property of the manufactured floor, JIS A141
8.Measurement method of floor impact level at building site”
The floor impact sound level was measured according to the following. This floor impact sound level was compared with JIS A 1419 to determine the sound insulation grade. (Adhesion) In order to evaluate the adhesion between the liquid polymer composition and concrete, a 180' beer test was conducted in accordance with JIS K 6301. To evaluate compression fatigue,
The test was conducted in accordance with "SRIS 3502 r Fatigue Test Method for Rubber Materials for Vibration Isolation Rubber".

ψ1: manufactured by Idemitsu Atochem ■, R45-}IT, number average molecular weight 2800, hydroxyl group content 0.79 meq/g 2 =
Hydrogenated liquid polybutadiene having a hydroxyl group at the end of the molecular chain obtained in Production Example 1 ◆3: Liquid polyisobrene having a hydroxyl group at the end of the molecular chain obtained in Production Example 2 + 4 = Molecular chain end obtained in Production Example 3 Liquid polyisoprene hydride with hydroxyl groups $5 Made by Nippon Polyurethane, Millionate MTL,
Liquid degeneration. It has excellent workability, with an isocyanate group content of 29.0% by weight. Therefore, the sound insulating floor of the present invention is useful in the field of architecture, particularly for floors in large areas such as apartment complexes, gymnasiums, and large halls.

Claims (1)

[Claims] (1) A cured product of a liquid polymer composition consisting of a hydroxyl group-containing liquid diene polymer or its hydride, a polyisocyanate compound, and a short-chain polyol compound is interposed between the flooring material and the underlying surface. Soundproof floor.