JPH01136735A - Sound-proof floor material - Google Patents

Abstract

PURPOSE:To obtain a superior floor material having sound-proof and moisture proof properties, by forming, on one surface of a base plate, a curing and coating film of a liquid polymer composite composed of liquid diene polymer containing hydroxyl group, polyisocyanate compound and bituminous material. CONSTITUTION:A liquid diene polymer containing hydroxyl group (for example, hydroxy-terminal liquid polybutadiene), a bituminous material (for example, straight asphalt) and, if necessary, a polyol compound (for example, ethylene glycol) are all mixed by predetermined amounts. Then, polyisocyanate compound (for example, diphenyl methane diisocyanate) is added by a predetermined amount as a reinforcing material. By mixing the above, a liquid polymer composite is prepared. After the liquid polymer composite is applied onto a base plate, it is cured. Accordingly, a superior floor material having sound-proof and moisture-proof properties can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a soundproof flooring material, and more particularly to a flooring material that has excellent soundproofing properties and is resistant to moisture.

[Prior art and problems to be solved by the invention] Compositions consisting of polyether polyol compounds, polyisocyanate compounds, and asphalt have been known, and it has also been known to use these compositions as flooring materials. (Japanese Patent Publication No. 53-44343). Such a composition may be used as a flooring material in its cured form, or it may be applied and cured on a substrate such as plywood, but usually it has mechanical strength etc. Considering this, the latter case is widely adopted.

However, although such conventional flooring materials have relatively good soundproofing properties, they have a major drawback in that they are inferior in resistance to moisture and are easily deteriorated by moisture coming from under the floor.

Therefore, the present inventors solved the drawbacks of the above conventional flooring materials,
We conducted extensive research to develop a new flooring material that is both soundproof and moisture resistant.

[Means for solving problems]

As a result, it has been found that the above object can be achieved by using a hydroxyl group-containing liquid diene polymer in place of the conventional polyether polyol compound. The present invention was completed based on this knowledge.

That is, the present invention provides a soundproof flooring material in which a cured film of a liquid polymer composition comprising a hydroxyl group-containing liquid diene polymer, a polyisocyanate compound, and a bituminous substance is formed on one side of a substrate. .

There are various kinds of hydroxyl group-containing liquid diene polymers used in the present invention, but usually liquid diene polymers having a hydroxyl group inside the molecular chain 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. Polymers are used.

Here, the content of hydroxyl groups is usually 0.1 to 10 milliliter! /g
, preferably 0.3 to 7 milliequivalents/g.

Examples of 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. There is. Specifically, butadiene homopolymer.

Isoprene homopolymer, butadiene-styrene copolymer, butadiene-isoprene copolymer.

Examples include butadiene-acrylonitrile copolymer, butadiene-2-ethylhexyl acrylate copolymer, butadiene-n-octadecyl acrylate copolymer, and the like. These liquid diene polymers are
For example, it can be produced by subjecting a conjugated diene monomer to a heating reaction in the presence of hydrogen peroxide in a liquid reaction medium.

Further, 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 polyisocyanate compounds include the usual aromatic, aliphatic and cycloaliphatic ones, such as tolylene diisocyanate; hexamethylene diisocyanate; diphenylmethane diisocyanate (MD).
I); Liquid modified diphenylmethane diisocyanate; Polymethylene polyphenylisocyanate; Xylylene diisocyanate; Cyclohexyl diisocyanate; Cyclohexanephenylene diisocyanate; Naphthalene-1,5-diisocyanate;
2,4-Diisocyanate: Examples include addition reaction products of polypropylene glycol and tolylene diisocyanate, and particularly preferred are MDI, liquid modified diphenylmethane diisocyanate, tolylene diisocyanate, and the like.

Note that this polyisocyanate compound may be appropriately blended with the hydroxyl group-containing liquid diene polymer, and there is no particular restriction on the blending ratio, but usually the hydroxyl group (OH) of the hydroxyl group-containing liquid diene polymer is The ratio of isocyanate groups (NGO) of the polyisocyanate compound to
COloH) in a molar ratio of 0.2 to 25, preferably 0.
It should be between 5 and 15. If this molar ratio is outside the above range, curing becomes difficult, which is not preferable.

Furthermore, bituminous materials include petroleum asphalt such as straight asphalt, blown asphalt, semi-prone asphalt, and solvent deasphalted asphalt, as well as petroleum pitch and coal tar.

A variety of materials can be used, including coal pitch. Further, this bituminous substance may be blended in an appropriate amount with respect to the hydroxyl group-containing liquid diene polymer, but it is usually 10 to 2000 parts by weight, preferably 50 parts by weight, per 100 parts by weight of the hydroxyl group-containing liquid diene polymer. It is blended in a proportion of ~1500 parts by weight.

The liquid polymer composition used in the present invention is basically the above-mentioned hydroxyl group-containing liquid diene polymer.

Consisting of polyisocyanate compounds and bituminous substances,
In addition to these, a polyol compound can be added as a reinforcing agent and various other additives can be added if desired.

As the polyol compound added if desired, any of primary polyol, secondary polyol, and tertiary polyol may be used. Specifically, for example, 1°2-propylene glycol; dipropylene glycol; 1,2-butanediol; 1,3-butanediol; 2,3-butanediol; 1,2-bentanediol; 2,3-bentanediol ;2,5-hexanediol;2,4-hexanediol;2-ethyl-1,3-hexanediol;cyclohexanediol;glycerin:N,N-bis-2-
At least one of hydroxypropylaniline; N,N'-bishydroxyisopropyl-2-methylbiperazine; propylene oxide adduct of bisphenol A;
Examples include low molecular weight polyols containing hydroxyl groups bonded to two secondary carbons.

Furthermore, as the polyol, ethylene glycol that does not contain a hydroxyl group bonded to a secondary carbon; 1,3=propylene glycol; 1,4-butanediol; 1,5-bentanediol; 1,6-hexanediol, etc. may also be used. can. Diols are usually used as polyols, but triols and tetraols may also be used, and their molecular weights range from 50 to 500.

Further, the polyamine compound may be any of diamine, triamine, and tetraamine, and furthermore, any of primary polyamine, secondary polyamine, and tertiary polyamine may 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-tri(dimethylaminomethyl)
Examples include tetramine such as phenol.

When blending these polyol compounds or polyamine compounds, there is no particular restriction on the blending ratio, but usually 1 to 1000 parts of the polyol compound or polyamine compound is added to 100 parts by weight of the above-mentioned hydroxyl group-containing liquid diene polymer. It is blended in an amount of 3 to 200 parts by weight, preferably 3 to 200 parts by weight.

Other optional additives include fillers such as mica, graphite vermiculite, calcium carbonate, and slate powder.

Furthermore, plasticizers such as dioctyl phthalate are added as viscosity modifiers, softeners such as aromatic, naphthenic, and paraffinic oils are added, and alkylphenol resins, terpene resins, and terpene resins are added to adjust adhesive strength and adhesive strength. Phenolic resin.

xylene formaldehyde resin, rosin, hydrogenated rosin,
Tackifying resins such as coumaron resins, aliphatic and aromatic petroleum resins can also be added. Further, curing accelerators 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 silicone compound can be added as an antifoaming agent.

The liquid polymer composition used in the present invention is obtained by blending and mixing the above-mentioned components. The blending procedure is not particularly limited and may be carried out in an appropriate order, but usually, the above raw materials excluding the polyisocyanate are blended first, and
Stir and mix at 0-70°C for 5-240 minutes, preferably 30-180 minutes, then add polyisocyanate to this mixture and mix at 0-70°C, preferably 15-50°C for 0.5 seconds-180 minutes. A liquid polymer composition is obtained by stirring and mixing, preferably for 1 second to 120 minutes.

If the liquid polymer composition obtained in this way is applied or sprayed onto one side of the substrate, particularly the back side, and then subjected to a curing treatment, the flooring material of the present invention with a cured film formed on one side (back side) of the substrate can be obtained. Become. There are various conditions for the curing treatment, and they may be selected appropriately depending on the situation, but usually the temperature is 0 to 150°C, preferably 15 to 12°C.
The treatment time may be 0.5 to 75 hours, preferably 1 to 72 hours within the range of 0°C. The thickness of the cured film formed on one side of the substrate in this way may be determined by taking into consideration the mechanical strength of the desired flooring material, etc., but is generally 0.0000.
1 to 20 am, preferably about 0.3 to 10 am.

Note that the substrate of the flooring material of the present invention can be made of various materials and have various shapes, and may be selected depending on the intended use. Examples of materials include vinyl chloride resin, china, ceramics, plywood, decorative plywood, flyers, slate, and asbestos slate.

Wood wool cement, pulp cement, wood chip cement.

There are various types such as Ceracola 2 asbestos cement gypsum and glass fiber reinforced polyester. In addition, shapes include, for example, square and rectangular flat plates, flat plates with single-sided chamfers, 9 double-sided flat plates, and boards with a cross section called curved, as well as inner baseboards, inner baseboard inserts, and inner width. There are various types of board materials such as boards of various shapes called single-sided wooden boards, single-sided internal baseboards, and members for stairs.

〔Example〕

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

Examples 1 and 2 and Comparative Example 1 Predetermined amounts of the components shown in Table 1 except for the polyisocyanate compound were blended, and the mixture was stirred at 100° C. for 300 minutes. Next, a predetermined amount of the polyisocyanate compound shown in Table 1 was added, and the mixture was stirred and mixed at 25°C for 5 minutes to prepare a liquid polymer composition. This liquid polymer composition was 3 mm x 300
A soundproof flooring material was manufactured by coating the back side of a 300m MO+X decorative plywood board to a thickness of 3cm and curing it at 25°C for 24 hours.

Separately, prepare the same liquid polymer composition as above, pour this liquid polymer composition into a mold, and heat at 120°C for 60 minutes.
Press hardening was carried out under the conditions of 200 kg/cm''G, and the following evaluations were performed on the obtained cured bodies. The results are shown in Table 1.

A hardened material of 2 mm x 100 holes x 100 pieces was dried at a temperature of 85°C.
5. The sample was left in a constant temperature and humidity chamber at 85% humidity for 168 hours, and the weight change rate and volume change rate were then measured.

An oscillator (manufactured by Toyo Baldwin Co., Ltd., model DDV-11-C.

Repeated vibrations were applied using a frequency of 11 Hz), and the dissipation rate (tan δ) was measured.

(Left below) *1 Hydroxyl-terminated liquid polybutadiene (manufactured by Idemitsu Arco ■, R-45HT, number average molecular weight 2800, hydroxyl group content 0.80 milliequivalents/g) *2 Polyoxypropylene glycol (manufactured by Nippon Soda ■, PPG)
2000. Number average molecular weight/2000) *3 Diphenylmethane diisocyanate (Made by Nippon Polyurethane ■, Millionate MTL.

liquid modification, isocyanate content 29.0% by weight) *4 Ethylene glycol *5 Straight asphalt (manufactured by Idemitsu Kosan ■).

Penetration 60/80) *6 Dibutyltin dilaurate (hereinafter referred to as the margin) [Effects of the invention] As described above, the soundproof flooring material of the present invention has excellent soundproofing properties and moisture resistance. It is expected to be used widely and effectively as a variety of flooring materials for various buildings.

Patent Applicant Idemitsu Petrochemical Co., Ltd. Agent Patent Attorney Yasushi Otani ・L,=,,l
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Claims (1)

[Claims] (1) On one side of the substrate, a hydroxyl group-containing liquid diene polymer,
A soundproof flooring material formed by forming a cured film of a liquid polymer composition comprising a polyisocyanate compound and a bituminous substance.