JP7340345B2 - air conditioning components - Google Patents

Description

The present invention relates to air conditioning members such as ducts and chambers installed in buildings, and particularly to air conditioning members whose main material is a polyisocyanurate foam molded product.

Generally, air conditioning members such as ducts and chambers are installed as air conditioning equipment in buildings such as office buildings, stores, and houses. The main material of the air conditioning member is, for example, a heat insulating foamed resin such as polyurethane (see the following patent documents, etc.).

Unexamined Japanese Patent Publication No. 2017-190900 JP 2017-203559 Publication

It is preferable that this type of air conditioning member has fireproofing properties as well as heat insulating properties. On the other hand, for example, in the case of air conditioning components made of hard polyurethane as the main material, the oxygen index of the hard polyurethane (the percentage of the oxygen concentration at the time of ignition when the oxygen concentration in the air is increased) is about 21, and the fire resistance is is not enough. Therefore, measures such as covering the surface with a metal layer such as aluminum foil are required (see the above-mentioned patent documents, etc.).
An object of the present invention is to provide an air conditioning member that has not only heat insulation properties but also fire resistance.

In order to solve the above problems, the present invention provides an air conditioning member installed in a building, comprising:
Composed of a polyisocyanurate foam molded product containing additives,
the additive includes a trimerization catalyst,
The polyisocyanurate foam molded article is characterized in that it has an isocyanate index of 200 to 500 and an oxygen index of 22 or more.

The polyisocyanurate foam molded article preferably has a compressive strength of 8 N/cm ² to 60 N/cm ² , a bending strength of 15 N/cm ² to 100 N/cm ² , and a heat resistance temperature of 80° C. to 140° C.

According to the present invention, an air conditioning member with high fireproofing properties can be obtained.

FIG. 1 is a sectional view of an air conditioning duct (air conditioning member) according to an embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows an air conditioning duct 1 (air conditioning member) in an air conditioning system for a building such as an office building, a store, or a house. The air conditioning duct 1 is used to flow conditioned air from an air conditioner (not shown) to the outlet, and to flow ventilation air to the ventilation outlet.

The peripheral wall of the air conditioning duct 1 includes a duct body 11 and an inner and outer surface layer 12 made of a metal film such as aluminum. The thickness of the duct body 11 is, for example, several cm, whereas the thickness of the surface layer 12 is several tens of μm. In the figure, the thickness of the surface layer 12 is exaggerated relative to the thickness of the duct body 11.

The duct body 11 is formed into a rectangular cross section by combining four flat boards 11a. The duct body 11 defines an air passage 1a. Although the cross section of the duct main body 11 is square in FIG. 1, it may be rectangular, it may be annular, it may be circular, or it may be a polygon other than a quadrangle.

The board 11a and thus the duct body 11 are made of a polyisocyanurate foam molded product. In other words, the air conditioning duct 1 is mainly made of a polyisocyanurate foam molded product.
A polyisocyanurate foam molded article is a foamed resin having polyisocyanurate and urethane bonds, and uses polyisocyanate, polyol, catalyst, blowing agent, various additives, etc. as starting materials.
Polyisocyanurate is obtained by trimerizing polyisocyanate and has an isocyanurate ring structure. Polyisocyanate and polyol react to form urethane bonds.

The polyisocyanate may be aromatic polyisocyanate, aliphatic polyisocyanate, or alicyclic polyisocyanate.
Examples of the aromatic polyisocyanate include phenylene diisocyanate, tolylene diisocyanate, xylylene diisocyanate, diphenylmethane diisocyanate, dimethyldiphenylmethane diisocyanate, triphenylmethane triisocyanate, naphthalene diisocyanate, and polymethylene polyphenyl polyisocyanate.
Examples of the aliphatic polyisocyanate include isophorone diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, and the like.
Examples of the alicyclic polyisocyanate include hydrogenated methylene diphenyl diisocyanate and hydrogenated tolylene diisocyanate.
Preferably, an aromatic polyisocyanate compound is used as the polyisocyanate. The above-mentioned aromatic polyisocyanate compounds may be used alone, or two or more kinds may be used as a mixture.

The polyol is not particularly limited as long as it is a compound having multiple hydroxyl groups. For example, a combination of an aromatic polyester polyol having two or more hydroxyl groups at the terminal or side chain obtained by condensing a bifunctional or trifunctional polyether polyol and/or a polybasic acid is used. It is suitable to use it as The preferred embodiments will be described in detail below. Polyols constituting bifunctional and/or trifunctional polyether polyols include bifunctional polyols (ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, butanediol, pentanediol, neopentyl). Glycol, hexanediol, cyclohexanedimethanol, bisphenol A, bisphenol F, bisphenol S, etc., or compounds obtained by addition polymerizing these with alkylene oxides such as ethylene oxide or propylene oxide, polyethylene glycol, polypropylene glycol, etc.), trifunctional polyols ( trimethylolpropane, glycerin, etc., or compounds obtained by addition polymerizing alkylene oxides to these, etc.). You may use these 1 type(s) or a combination of 2 or more types. Further, examples of the polybasic acid constituting the aromatic polyester polyol include orthophthalic acid, isophthalic acid, terephthalic acid, hexahydrophthalic acid, tetrahydrophthalic acid, trimellitic acid, pyromellitic acid, and the like. Here, polyester polyols obtained by condensing phthalic acid with one or more bifunctional, trifunctional or polyfunctional alcohols or alkylene oxide adducts thereof are preferred, and more preferably polyester polyols are obtained by condensing phthalic acid with one or more of bifunctional, trifunctional or polyfunctional alcohols or alkylene oxide adducts thereof. It is a polyester polyol obtained by condensing diethylene glycol. The content of hydroxyl groups in the aromatic polyester polyol is 2 or more, preferably 2 to 3.

The isocyanate index (percentage of equivalent ratio of isocyanate groups to active hydrogen groups in all raw materials) of the polyisocyanurate foam molded product is preferably 200 to 500, more preferably 300 to 450.

The catalyst essentially includes a trimerization catalyst. Preferably, it is a mixed catalyst of a trimerization catalyst, a resin forming catalyst, and a foaming catalyst, and preferably a mixed catalyst of a metal salt catalyst and an amine catalyst. Here, as the trimerization catalyst, for example, 1) metal oxides such as lithium oxide, sodium oxide, potassium oxide, etc.; 2) methoxy sodium, ethoxy sodium, propoxy sodium, butoxy sodium, methoxy potassium, ethoxy potassium, propoxy potassium , alkoxides such as butoxypotassium; 3) organometallic salts such as potassium acetate, potassium octylate, potassium caprylate, iron oxalate; 4) 2,4,6-tris(dimethylaminomethyl)phenol, N,N' ,N”-tris(dimethylaminopropyl)hexahydrotriazine, triethylenediamine, and other tertiary amines; 5) Ethyleneimine derivatives; 6) Acetylacetone chelates and quaternary ammonium salts of alkali metals, aluminum, and transition metals. These can be used alone or in combination of two or more, and among them, it is more preferable to use organic metal salts and quaternary ammonium salts.Preferably, potassium acetate and There are no particular limitations on the resin-forming or foaming catalyst, and those used in the production of ordinary urethane foam can be used.For example, monoamines (N, N-dimethylcyclohexylamine, N,N-dicyclohexylmethylamine, triethylamine, N,N-dimethylbenzylamine, etc.), cyclic monoamines (pyridine, N-methylmorpholine, N-ethylmorpholine, etc.), diamines (N , N,N',N'-tetramethylethylenediamine, N,N,N',N'-tetramethyl-1,3-propanediamine, N,N,N',N'-tetramethyl-1,3- butanediamine, N, N, N', N'-tetramethylhexanediamine, methylene-bis(dimethylcyclohexylamine), N,N,N',N'-tetraethylethylenediamine, etc.), triamines (N,N,N ',N',N''-pentamethyldiethylenetriamine, N,N,N',N',N''-pentamethyldipropylenetriamine, 2,4,6-tris(dimethylaminomethyl)-phenol, etc.), ether diamine (bis(2-dimethylaminoethyl)ether, 2-(N,N-dimethylamino)ethyl-3-(N,N-dimethylamino)propyl ether, 4,4'-oxydimethylene dimorpholine, etc.), Cyclic polyamines (triethylenediamine, N,N'-dimethylpiperazine, N,N'-diethylpiperazine, N,N-dimethylaminoethylmorpholine, 1-isobutyl-2-methylimidazole, 1-butoxy-2-methylimidazole etc.), alkanolamines (N, N, N'-trimethylaminoethylethanolamine, N,N,N'-trimethylaminopropylethanolamine, 2-(2-dimethylamino-ethoxy)ethanol, N,N-dimethyl Examples include amine catalysts such as aminoethanol, N,N-trimethyl-1,3-diamino-2-propanol, N-methyl-N'-(2-hydroxyethyl)-piperazine, etc.). These catalysts may be used alone or in combination of two or more.
The amount of trimerization catalyst is preferably 0.1 to 3.0 parts by weight based on 100 parts by weight of the total amount of polyisocyanate and polyol. The total amount of the resin forming catalyst and the foaming catalyst added is preferably 0.1 to 3.0 parts by weight based on 100 parts by weight of the total amount of polyisocyanate and polyol.

Furthermore, a foaming agent is used to foam-mold the polyisocyanurate foam molded article. Blowing agents include water, hydrofluoroolefins (HFO), hydrocarbons such as pentane, or combinations thereof.
The amount of the blowing agent is preferably 0.5 to 20 parts by weight based on 100 parts by weight of the total amount of polyisocyanate and polyol.
The foaming ratio of the polyisocyanurate foam molded article is preferably 10 times to 40 times.

Further, flame retardant additives and reinforcing additives are added to the polyisocyanurate foam molded article as additives.
Flame retardant additives include tris(β-chloropropyl) phosphate, triethyl phosphate, diethyl [[bis(2-hydroxyethyl)amino]methyl]phosphonate, condensates of phosphoryl trichloride with phenol and resorcinol, and cyclophosphazene compounds. , ammonium(II) polyphosphate, red phosphorus, etc.
The amount of the flame retardant additive is preferably 0.5 to 20 parts by weight based on 100 parts by weight of the total amount of polyisocyanate and polyol.

It is believed that the isocyanate index and the flame retardant additive mainly contribute to improving the fire resistance of the polyisocyanurate foam molded article.
The oxygen index (percentage of oxygen concentration at the time of ignition after increasing the oxygen concentration in the air) of the polyisocyanurate foam molded product is preferably 22 or more, more preferably 26 or more.
Although no upper limit is specified, a value of 40 or less is suitable. Therefore, the polyisocyanurate foam molded product has self-extinguishing properties.

The compressive strength of the polyisocyanurate foam molded product is preferably 8 N/cm ² to 60 N/cm ² , more preferably 20 N/cm ² or more.
The bending strength of the polyisocyanurate foam molded product is preferably 15 N/cm ² to 100 N/cm ² , more preferably 30 N/cm ² or more.

The heat resistant temperature of the polyisocyanurate foam molded product is preferably 80°C to 140°C, more preferably 120°C or higher. Here, the heat-resistant temperature is the upper limit temperature at which the polyisocyanurate foam molded product does not undergo thermal deformation such as swelling, denting, cracking, curving, or discoloration, and does not change its physical properties.
The thermal conductivity of the polyisocyanurate foam molded product is preferably 0.1 W/(m·K) or less, more preferably about 0.020 W/(m·K).
The density of the polyisocyanurate foam molded product is preferably about 25 to 40 kg/m ³ , more preferably about 30 to 36 kg/m ³ .
The moisture permeability coefficient of the polyisocyanurate foam molded product is preferably 10 ng/m ² ·s·Pa or less, more preferably 2 ng/m ² ·s·Pa or less.
The water absorption amount of the polyisocyanurate foam molded article is preferably 3 g/100 cm ² or less, more preferably 2 g/100 cm ² or less.

According to the air conditioning duct 1 having the duct body 11 made of such a polyisocyanurate foam molded product, it is possible to not only ensure heat insulation but also improve fire resistance. Moreover, mechanical strength such as compressive strength and bending strength can be sufficiently increased.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit thereof.
For example, the air conditioning member according to the present invention is not limited to an air conditioning duct, but may be an air conditioning chamber.
The surface layer 12 may be omitted.

An example will be explained. The present invention is not limited to the following examples.
The following solutions A and B were prepared.
A liquid:
100 parts by weight of a polyester polyol (OHV 400 mg KOH/g, weight average molecular weight 510) obtained by dehydrating condensation of orthophthalic acid and diethylene glycol (DEG) as a polyester polyol;
As polyether polyol, 14.1 parts by weight of diethylene glycol (DEG) and 2.0 parts by weight of triethylene glycol (TEG) per 100 parts by weight of polyester polyol;
As foam stabilizers, based on the total mass of the foaming raw material composition, 0.9% by mass of Niax Silicone L-6638 (manufactured by MOMENTIVE) and methyl carbitol (trade name of Sankyo Chemical Co., Ltd.) are used. Diglycol) was added at a concentration of 0.6% by mass. As catalysts, based on the total mass of the foaming raw material composition, potassium octylate and potassium acetate were used as trimerization catalysts at 0.6% by mass and 0.3% by mass, respectively, and Lebeac DMP-30 (manufactured by Nacalai Tesque) was used. It was added at a concentration of 0.3% by mass.
Furthermore, as a flame retardant, tris(1-chloro-2-propyl) phosphate (TCPP) (trade name: ProFlame-PC1389, manufactured by Pro Flame) was used at 16% by mass based on the total mass of the foaming raw material composition. Added so that
Further, cyclopentane (trade name: Marcazol FH, manufactured by Maruzen Sekiyu Co., Ltd.) was added as a physical foaming agent in an amount of 6.5% by mass based on the total mass of the foaming raw material composition.
B liquid:
Polyisocyanate (crude MDI manufactured by Tosoh Corporation, product name: MR-200)

The above-mentioned liquid A and liquid B were mixed and stirred in an amount to give an isocyanate index of 450, and a polyisocyanurate foam molded product was foam-molded into a board shape.
<Evaluation>
A sample of the polyisocyanurate foam molded product was placed in a glass cylinder, and the oxygen concentration (oxygen index) at the time of ignition with a burner was measured while increasing the oxygen concentration in the glass cylinder, and the oxygen index was 26. Ta.

Furthermore, the thermal conductivity of the polyisocyanurate foam molded article was measured by a method according to JISA9521, and was 0.020 W/m·K at 23°C.
As for the heat resistance temperature of the polyisocyanurate foam molded article, when the bending strength was measured by a method according to JISA9521, the result at 23°C was 100%, whereas the result at 120°C was 98%.
The compressive strength of the polyisocyanurate foam molded article was 20 N/cm ² when measured by a method according to JISA9521.
The bending strength of the polyisocyanurate foam molded product was 60 N/cm ² when measured by a method according to JISA9521. The thickness of the sample was 25 mm.
The density of the polyisocyanurate foam molded article was 34 kg/m ³ when measured by a method according to JISA9521.
The moisture permeability coefficient of the polyisocyanurate foam molded article was measured by a method according to JISA9521, and was 10 ng/m ² ·s · Pa or less.
The water absorption amount of the polyisocyanurate foam molded article was measured by a method according to JISA9521, and was 2.0 g/100 cm ² or less.

The present invention can be applied to, for example, air conditioning ducts in buildings.

1 Air conditioning duct (air conditioning parts)
11 Duct body 12 Surface layer

Claims (4)

An air conditioning member installed in a building,
Composed of a polyisocyanurate foam molded product containing additives,
The additive includes a trimerization catalyst (provided that the following general formula (1)

(In the formula, R ₁ , R ₂ , and R ₃ each independently represent an alkyl group having 1 to 20 carbon atoms.) A hard polyisocyanurate consisting of an aliphatic amine compound represented by the formula and a polyisocyanurate catalyst. (excluding catalyst compositions for foam production),
An air conditioning member characterized in that the polyisocyanurate foam molded article has an isocyanate index of 200 to 500 and an oxygen index of 22 to 26 . An air conditioning member installed in a building,
Composed of a polyisocyanurate foam molded product containing additives,
The additive includes a trimerization catalyst (provided that the following general formula (1)

(In the formula, R ₁ , R ₂ , and R ₃ each independently represent an alkyl group having 1 to 20 carbon atoms.) A hard polyisocyanurate consisting of an aliphatic amine compound represented by the formula and a polyisocyanurate catalyst. (excluding catalyst compositions for foam production),
The polyisocyanurate foam molded article has an isocyanate index of 200 to 500 and an oxygen index of 22 or more,
An air conditioning member characterized in that the polyisocyanurate foam molded product has a bending strength of 60 N/cm ² to 100 N/cm ² . The moisture permeability coefficient of the polyisocyanurate foam molded product is 10 ng/m ² ・s・Pa or less and/or the water absorption amount of the polyisocyanurate foam molded product is 3 g/100 cm ² The air conditioning member according to claim 1 or 2, which is as follows. A method for manufacturing an air conditioning member installed in a building, the method comprising:
Composed of a polyisocyanurate foam molded product containing additives,
The additive includes a trimerization catalyst (provided that the following general formula (1)

(In the formula, R ₁ ,R ₂ ,R ₃ each independently represents an alkyl group having 1 to 20 carbon atoms. ), excluding catalyst compositions for producing rigid polyisocyanurate foams consisting of an aliphatic amine compound and a polyisocyanurate catalyst shown in ),
In the method for producing an air conditioning member, the polyisocyanurate foam molded product has an isocyanate index of 200 to 500 and an oxygen index of 22 or more,
A manufacturing method characterized in that a hydrocarbon is used as a blowing agent for foam-molding the polyisocyanurate foam molded article.

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