Polyol-containing composition and polyurethane foam

Abstract

To provide a novel polyurethane foam.SOLUTION: A polyol-containing composition for the production of polyurethane foam is provided, the polyol-containing composition comprising an aromatic polyol that meets all of the following requirements (i), (ii), and (iii): (i) it is derived from cashew nutshells; (ii) it has a molecular weight of 500 or more; (iii) it comprises a phenolic hydroxyl group.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present disclosure relates to polyol-containing compositions and polyurethane foams. [Background technology]

[0002] Patent Documents 1 and 2 disclose polyurethane foams obtained by reacting a polyisocyanate component with an isocyanate-reactive component containing a polyether polyol. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2008-144171 A [Patent Document 2] Patent Publication No. 2022-142718 Summary of the Invention [Problem to be solved by the invention]

[0004] Some conventional polyurethane foams are not sufficient for practical use. The present disclosure aims to obtain a novel polyurethane foam. The present disclosure can be realized in the following forms. [Means for solving the problem]

[0005] [1] A polyol-containing composition for obtaining a polyurethane foam, comprising: A polyol-containing composition containing an aromatic polyol that satisfies all of the following (i), (ii), and (iii): (i) Derived from cashew nut shells. (ii) The molecular weight is 500 or more. (iii) Having a phenolic hydroxyl group. Effect of the Invention

[0006] In accordance with the present disclosure, novel polyurethane foams are provided. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] Here, a preferred example of the present disclosure is given. [2] The polyol-containing composition according to [1], wherein the aromatic polyol has a plurality of benzene rings.

[0008] [3] The polyol-containing composition according to [1] or [2], wherein the aromatic polyol has an aromatic concentration of 10% or more.

[0009] [4] The polyol-containing composition according to any one of [1] to [3], which is for application by a spray method.

[0010] [5] A polyurethane foam obtained from the polyol-containing composition according to any one of [1] to [4].

[0011] [6] A polyol-containing composition for obtaining a polyurethane foam, comprising: Contains an aromatic polyol having a plurality of benzene rings each having a phenolic hydroxyl group, Polyol-containing compositions.

[0012] The present disclosure will be described in detail below. In this specification, when a numerical range is described using "-", the lower limit and the upper limit are included unless otherwise specified. For example, the description "10-20" includes both the lower limit "10" and the upper limit "20". In other words, "10-20" has the same meaning as "10 or more and 20 or less". In this specification, the upper limit and the lower limit of each numerical range can be arbitrarily combined.

[0013] 1. Polyol-containing composition and polyurethane foam according to the first embodiment 1-1. Polyol-containing composition The polyol-containing composition of the first embodiment is a composition for obtaining a polyurethane foam. The polyol-containing composition contains an aromatic polyol that satisfies all of the following (i), (ii), and (iii): (i) Derived from cashew nut shells. (ii) The molecular weight is 500 or more. (iii) Having a phenolic hydroxyl group.

[0014] Polyurethane foams are obtained by reacting a polyol-containing composition with an isocyanate.

[0015] (1) Aromatic polyol The aromatic polyol is a polyol derived from cashew nut shell liquid (CNSL). Cashew nut shell liquid is an oily liquid contained in the shells of cashew nuts (cashew nut shells) and is prepared from cashew nut shells by extraction or heating. Cashew nut shell liquid is a renewable resource material and is a starting material derived from plants and not from petroleum. Cashew nut shell liquid mainly contains anacardic acid, cardol, methyl cardol, and cardanol. The aromatic polyol is obtained from the distillation residue when cardanol is distilled from cashew nut shell liquid. It is preferable that the polyol-containing composition does not contain cardanol.

[0016] The aromatic polyol has a phenolic hydroxyl group. The phenolic hydroxyl group is a hydroxyl group bonded to an aromatic ring carbon. The aromatic polyol preferably has a plurality of benzene rings on which the phenolic hydroxyl group exists. The aromatic polyol is preferably represented by the following structural formula (1).

[0017] [ka]

[0018] [In formula (1), R 1 , R 2 are each independently a hydrogen atom or a hydroxyl group, R 3 , R 4 are each a saturated or unsaturated divalent hydrocarbon group having from 10 to 25 carbon atoms. R 3 , R 4 The number of carbon atoms is preferably 12 or more and 20 or less, and more preferably 15.

[0019] The aromatic polyol of structural formula (1) is also represented by the following structural formula (2).

[0020] [ka]

[0021] [In formula (2), each of the two R's is an alkylene group having 15 carbon atoms]

[0022] From the viewpoint of ensuring resin strength, the molecular weight of the aromatic polyol is 500 or more, preferably 550 or more, and more preferably 600 or more. The upper limit of the molecular weight of the aromatic polyol is usually 1,000 or less.

[0023] From the viewpoint of improving flame retardancy, the aromatic concentration of the aromatic polyol is preferably 10% or more, more preferably 15% or more, and even more preferably 20% or more. From the viewpoint of suppressing an increase in viscosity, the aromatic concentration of the aromatic polyol is preferably 40% or less, more preferably 30% or less, and even more preferably 25% or less. From these viewpoints, the aromatic concentration of the aromatic polyol is preferably 10% or more and 40% or less, more preferably 15% or more and 30% or less, and even more preferably 20% or more and 25% or less. The aromatic concentration of the aromatic polyol is obtained based on the mass% of the total of carbon atoms and hydrogen atoms constituting the aromatic ring in the aromatic polyol. The aromatic concentration of the aromatic polyol can be calculated by the method disclosed in the non-patent document (Chemistry and Technology of Polyols for Polyurethanes, M. Ionescu, Rapra Technology, 2005).

[0024] From the viewpoint of improving flame retardancy, the content of aromatic polyol is preferably 5 parts by mass or more, more preferably 10 parts by mass or more, and even more preferably 20 parts by mass or more, when the total amount of polyol is 100 parts by mass. From the viewpoint of ensuring resin strength, the content of aromatic polyol is preferably 80 parts by mass or less, more preferably 70 parts by mass or less, and even more preferably 60 parts by mass or less, when the total amount of polyol is 100 parts by mass. From the above viewpoints, the content of aromatic polyol is preferably 5 parts by mass or more and 80 parts by mass or less, more preferably 10 parts by mass or more and 70 parts by mass or less, and even more preferably 20 parts by mass or more and 60 parts by mass or less, when the total amount of polyol is 100 parts by mass. Here, "polyol" includes aromatic polyol and all other polyols.

[0025] The hydroxyl value of the aromatic polyol is preferably from 100 mgKOH / g to 300 mgKOH / g, more preferably from 150 mgKOH / g to 270 mgKOH / g, and even more preferably from 180 mgKOH / g to 240 mgKOH / g.

[0026] The viscosity of the aromatic polyol at 25° C. is preferably 600 cps or more and 5000 cps or less, more preferably 800 cps or more and 4500 cps or less, and even more preferably 1000 cps or more and 4000 cps or less.

[0027] The number of functional groups of the aromatic polyol is preferably 5 or less, more preferably 4 or less, and even more preferably 3 or less.

[0028] (2) Other polyols The polyol-containing composition preferably contains a polyol other than the aromatic polyol. The other polyol is preferably an ethylenediamine-based polyether polyol. The ethylenediamine-based polyether polyol is preferably an addition polymerization product of propylene oxide and ethylenediamine.

[0029] The hydroxyl value of the ethylenediamine-based polyether polyol is preferably from 600 mgKOH / g to 900 mgKOH / g, more preferably from 650 mgKOH / g to 850 mgKOH / g, and even more preferably from 700 mgKOH / g to 800 mgKOH / g.

[0030] The viscosity of the ethylenediamine-based polyether polyol at 25° C. is preferably 35,000 mPs·s or more and 60,000 mPs·s or less, more preferably 40,000 mPs·s or more and 55,000 mPs·s or less, and even more preferably 45,000 mPs·s or more and 50,000 mPs·s or less.

[0031] The content of the ethylenediamine-based polyether polyol is preferably 20 parts by mass or more and 90 parts by mass or less, more preferably 25 parts by mass or more and 70 parts by mass or less, and even more preferably 30 parts by mass or more and 60 parts by mass or less, based on 100 parts by mass of the total amount of polyols.

[0032] (3) Flame retardants The polyol-containing composition preferably contains a flame retardant, such as a phosphate ester compound (e.g., tris(β-chloropropyl)phosphate, triethylphosphate, or tricresylphosphate), a phosphorus compound (e.g., red phosphorus, or ammonium polyphosphate), a melamine compound, a metal hydrate, or an antimony compound.

[0033] The content of the flame retardant is preferably 5 parts by mass or more and 40 parts by mass or less, more preferably 8 parts by mass or more and 35 parts by mass or less, and even more preferably 10 parts by mass or more and 30 parts by mass or less, based on 100 parts by mass of the total amount of polyol.

[0034] (4) Foam stabilizer The polyol-containing composition preferably contains a foam stabilizer. The foam stabilizer may be any foam stabilizer that is commonly used as a raw material for urethane foam, such as a silicon compound or a nonionic surfactant.

[0035] The content of the foam stabilizer is preferably 1.0 parts by mass or more and 10.0 parts by mass or less, more preferably 2.0 parts by mass or more and 5.0 parts by mass or less, and even more preferably 2.5 parts by mass or more and 3.0 parts by mass or less, relative to 100 parts by mass of the total amount of polyol.

[0036] (5) Catalyst The polyol-containing composition preferably contains a catalyst. The catalyst is mainly for promoting the urethane reaction between the polyol and the isocyanate. Examples of the catalyst include amine catalysts such as tertiary amines, organometallic compounds, acetates, and alkali metal alcoholates. The catalyst preferably does not contain a trimerization catalyst.

[0037] The content of the tertiary amine is preferably 1.0 parts by mass or more and 10.0 parts by mass or less, more preferably 2.0 parts by mass or more and 7.0 parts by mass or less, and even more preferably 2.5 parts by mass or more and 5.0 parts by mass or less, based on 100 parts by mass of the total amount of polyol.

[0038] Examples of the amine catalyst include N,N,N',N",N"-pentamethyldiethylenetriamine, bis(2-dimethylaminoethyl)ether, triethylamine, dimethylaminoethoxyethanol, and N,N,N'-trimethylaminoethyl-ethanolamine.

[0039] The content of the amine catalyst is preferably 0.5 parts by mass or more and 10.0 parts by mass or less, more preferably 1.0 parts by mass or more and 7.0 parts by mass or less, and even more preferably 1.5 parts by mass or more and 5.0 parts by mass or less, based on 100 parts by mass of the total amount of polyol.

[0040] (4) Foaming agent The polyol-containing composition preferably contains a blowing agent, such as water or a hydrohaloolefin. The water content is preferably 0.5 parts by mass or more and 10.0 parts by mass or less, more preferably 1.0 parts by mass or more and 5.0 parts by mass or less, and even more preferably 1.5 parts by mass or more and 3.0 parts by mass or less, relative to 100 parts by mass of the total amount of polyol.

[0041] As the hydrohaloolefin, a hydrofluoroolefin (HFO) containing a fluorine atom is preferable. As the hydrofluoroolefin (HFO), a hydrochlorofluoroolefin (HCFO) is preferable. As the hydrochlorofluoroolefin (HCFO), 3-chloro-1,3,3-trifluoropropene (HCFO-1233ZE), 1-chloro-2,3,3-trifluoropropene (HCFO-1233yd), 2-chloro-1,1,3-trifluoropropene (HCFO-1233xc), 2-chloro-1,3,3-trifluoropropene (HCFO-1233xe), 1-chloro-1 ,2,3-trifluoropropene (HCFO-1233yb), 1-chloro-1,3,3-trifluoropropene (HCFO-1233zb), 3-chloro-1,1,3-trifluoropropene (HCFO-1233zc), 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd), 2,3,3-trichloro-3-fluoropropene (HCFO-1231xf), 2,3-dic 2,3-dichloro-3,3-difluoropropene (HCFO-1232xf), 1,2-dichloro-3,3,3-trifluoropropene (HCFO-1223xd), 2-chloro-1,1,3,3-tetrafluoropropene (HCFO-1224xc), 1,1-dichloro-2-fluoroethylene (HCFO-1121a), 1, 2-Dichloro-1-fluoroethylene (HCFO-1121), 1-chloro-1-fluoroethylene (HCFO-1131a), 1-chloro-2-fluoroethylene (HCFO-1131), 1-chloro-2,2-difluoroethylene (HCFO-1122), 1,1,2-trifluoro-2-chloroethylene (HCFO-1113), 1-chloro-3,3,3-trifluoro-1-propyne (CF 3 -C≡CCl) and the like.

[0042] The content of the hydrohaloolefin is preferably 1 part by mass or more and 50 parts by mass or less, more preferably 10 parts by mass or more and 40 parts by mass or less, and even more preferably 15 parts by mass or more and 35 parts by mass or less, relative to 100 parts by mass of the total amount of the polyol.

[0043] 1-2. Isocyanate The isocyanate that reacts with the polyol-containing composition to obtain a polyurethane foam will be described. As the isocyanate, any isocyanate that is generally used in the production of polyurethane foam can be used. The isocyanate preferably contains one or more MDI-based compounds selected from the group consisting of diphenylmethane diisocyanate (MDI), modified MDI, and polymeric MDI.

[0044] Diphenylmethane diisocyanate is, for example, 4,4'-diphenylmethane diisocyanate (4,4'-MDI), 2,2'-diphenylmethane diisocyanate (2,2'-MDI), 2,4'-diphenylmethane diisocyanate (2,4'-MDI), and a mixture of two or more of these.

[0045] The modified MDI is, for example, a carbodiimide modified MDI, a urethane modified MDI, a uretoimine modified MDI, etc. The modified MDI preferably includes a carbodiimide modified MDI.

[0046] Polymeric MDI is a polyphenylene polymethylene polyisocyanate, and is, for example, a mixture of dinuclear MDI and trinuclear or higher polynuclear MDI. Polymeric MDI may be untreated crude MDI obtained by MDI synthesis reaction, or may be MDI obtained by separating a desired amount of monomeric MDI from the crude MDI by vacuum distillation to adjust the composition.

[0047] The isocyanate index (INDEX) is preferably from 80 to 200, more preferably from 90 to 150, and further preferably from 100 to 130. The isocyanate index is a value obtained by dividing the number of moles of isocyanate groups in an isocyanate by the total number of moles of active hydrogen groups such as hydroxyl groups of a polyol and water as a blowing agent, and multiplying the result by 100, and is calculated as [NCO equivalent of isocyanate / active hydrogen equivalent×100].

[0048] The isocyanate content is preferably 130 parts by mass or more and 300 parts by mass or less, more preferably 140 parts by mass or more and 250 parts by mass or less, and even more preferably 150 parts by mass or more and 200 parts by mass or less, relative to 100 parts by mass of the total amount of polyol.

[0049] 1-3. Uses of polyol-containing compositions The polyol-containing composition is preferably for application by a spray method, in which liquid A (polyol-containing composition) and liquid B (isocyanate) are mixed on-site and sprayed with a spray foaming machine to form a polyurethane foam (so-called on-site foamed polyurethane foam).

[0050] 1-4. Uses of polyurethane foam Polyurethane foam is preferably used for building components (walls, ceilings, roofs, floors, etc.), fittings (windows, shoji screens, sliding doors, sliding doors, transoms, etc.), ships and storage tanks for transporting oil or gas, vehicles (engines, batteries, ceilings, floors, door panels, etc.), aircraft, transport aircraft, cold storage bags for transporting medicines, freezers and refrigerated rooms, plant facilities, electrical appliances such as refrigerators, insulation materials, heat materials, and cold resistance mitigation materials for retaining walls, underground filling reinforcement materials during land subsidence prevention work or road construction, civil engineering injection repair materials for tunnels, bridges, floating piers, etc., structural filling materials for unnecessary basements, energy absorbing materials, waterproofing materials, water-stopping materials, buoyancy materials, etc. Polyurethane foam is preferably used for heat insulation construction in wooden or reinforced concrete buildings, etc. Polyurethane foam is preferably used for sandwich panels (sandwiched between metal plates) used as heat insulation materials for factories and homes. The polyurethane foam is preferably used for an instrument panel or a headrest of a vehicle which is integrally formed with the surface of the vehicle.

[0051] 1-5. Physical properties of polyurethane foam [Biomass ratio] The biomass ratio based on the blending ratio of raw materials in a polyurethane foam is calculated using the following formula (3).

[0052]

number

[0053] In formula (3), "the number of parts of plant-derived polyol added" refers to the total number of parts of all plant-derived polyols added when multiple types of plant-derived polyols are used. The plant-derived polyol is, for example, the aromatic polyol. "The biomass degree of the plant-derived polyol" refers to the proportion of plant-derived materials in the raw materials. "The number of parts of all raw materials added" refers to the total number of parts of all raw materials of the polyurethane foam added. All raw materials include plant-derived polyols, other polyols, flame retardants, foam stabilizers, catalysts, blowing agents, isocyanates, etc. "The number of parts of blowing agent added" refers to the total number of parts of all blowing agents added. All blowing agents include water, hydrohaloolefins, etc. The units of "the number of parts of plant-derived polyol added", "the number of parts of hydrohaloolefin added", and "the number of parts of all raw materials added" are parts by mass.

[0054] The biomass degree based on the blending ratio of the raw materials in the polyurethane foam is preferably 1% or more, more preferably 10% or more, and even more preferably 20% or more.

[0055] [Apparent density] The apparent density of polyurethane foam (JIS K 7222:2005) is 25kg / m 3 More than 45kg / m 3 Less than 28kg / m is preferable. 3 More than 42kg / m 3 Less than 30kg / m is more preferable. 3 More than 40kg / m 3 The following is even more preferred:

[0056] [Burning distance and burning time] The burning distance (JIS A 9511) of the polyurethane foam is preferably 150 mm or less, more preferably 90 mm or less, and even more preferably 30 mm or less. The lower limit of the burning distance of the polyurethane foam is not particularly limited. The burning time (JIS A 9511) of the polyurethane foam is preferably 200 s or less, more preferably 120 s or less, and even more preferably 40 s or less.

[0057] [Adhesive strength] The adhesive strength (tensile strength, JIS A 9526:2017) of the polyurethane foam is preferably 40 N or more, more preferably 100 N or more, and even more preferably 200 N or more. There is no particular upper limit to the adhesive strength of the polyurethane foam. The adhesive strength of the polyurethane foam can be measured for a sample having a configuration in which the polyurethane foam is formed on a plate material by a spray method.

[0058] [Compressive strength] The compressive strength (JIS K 7200) of the polyurethane foam is preferably 180 kPa or more, more preferably 200 kPa or more, and even more preferably 250 kPa or more. The upper limit of the compressive strength of the polyurethane foam is usually not particularly limited.

[0059] 1-6. Effects of the First Embodiment According to the polyol-containing composition and polyurethane foam of the first embodiment, a novel polyurethane foam can be provided. Specifically, a polyurethane foam having sufficient flame retardancy and adhesiveness for practical use can be produced using a raw material derived from cashew nut shells.

[0060] 2. Polyol-containing composition and polyurethane foam according to the second embodiment The polyol-containing composition of the second embodiment is a composition for obtaining a polyurethane foam. The polyol-containing composition contains an aromatic polyol having a plurality of benzene rings each having a phenolic hydroxyl group.

[0061] Polyurethane foams are obtained by reacting a polyol-containing composition with an isocyanate.

[0062] 2-1. Citation of the description of the polyol-containing composition and polyurethane foam of the first embodiment Regarding the polyol-containing composition, the explanations in the section "Polyol-containing composition and polyurethane foam of the first embodiment" for "other polyols," "flame retardants," "foam stabilizers," "catalysts," "foaming agents," "isocyanates," "uses of polyurethane foam," and "physical properties of polyurethane foam" apply as is, and the description thereof is omitted. In other words, the explanations in the section "Polyol-containing composition and polyurethane foam of the first embodiment" for "other polyols," "flame retardants," "foam stabilizers," "catalysts," "foaming agents," "isocyanates," "uses of polyurethane foam," and "physical properties of polyurethane foam" apply as is.

[0063] (1) Aromatic polyol For the aromatic polyol, the same description as given in the section entitled "Polyol-Containing Composition and Polyurethane Foam of the First Embodiment" applies as is, except for the description of the production method and molecular weight of the "aromatic polyol."

[0064] The aromatic polyol is preferably a polyol derived from cashew nut shell liquid (CNSL). Cashew nut shell liquid is an oily liquid contained in the shells of cashew nuts, and is prepared from cashew nut shells by extraction or heating. Cashew nut shell liquid is a renewable resource material, and is a starting material derived from plants, not from petroleum. Cashew nut shell liquid mainly contains anacardic acid, cardol, methyl cardol, and cardanol. The aromatic polyol is preferably obtained from a distillation residue when cardanol is distilled from the cashew nut shell liquid. The aromatic polyol may be industrially (chemically) synthesized. The polyol-containing composition preferably does not contain cardanol.

[0065] From the viewpoint of ensuring resin strength, the molecular weight of the aromatic polyol is preferably 500 or more, more preferably 550 or more, and even more preferably 600 or more. The upper limit of the molecular weight of the aromatic polyol is usually 1000 or less. The molecular weight here is a value calculated based on atomic weight (the sum of the atomic weights of the atoms constituting the molecule).

[0066] 2-2. Effects of the second embodiment According to the polyol-containing composition and polyurethane foam of the second embodiment, a novel polyurethane foam can be provided. Specifically, a polyurethane foam having sufficient flame retardancy and adhesiveness for practical use can be produced. EXAMPLES

[0067] The present invention will be described more specifically below with reference to examples.

[0068] 1. Preparation of Polyurethane Foam The polyurethane foams of Examples 1-6 and Comparative Examples 1 and 2 were produced according to the blending ratios shown in Table 1. In Comparative Examples 1 and 2, no aromatic polyol (polyol represented by the above structural formulas (1) and (2)) was used as a raw material. In Table 1, the blending ratios are expressed in parts by mass when the polyol is taken as 100 parts by mass.

[0069] [Table 1]

[0070] Details of the raw materials for the polyurethane foam in Table 1 are shown below. (Polyol-containing composition: Solution A) Polyol 1: Aromatic polyol derived from cashew nut shell liquid (polyol represented by the above structural formulas (1) and (2)), product name: NX5285 (Cardrite), biomass degree: 93%, average hydroxyl value: 180 mg KOH / g-240 mg KOH / g (Table 1 shows the average values ​​of the numerical range), average viscosity (25°C): 1000 cps-4000 cps, average number of functional groups: 2.8, aromatic concentration: 21.5% Polyol 2: Phthalic anhydride polyester polyol, product name: RDK133 (Kawasaki Chemical Industries, Ltd.), hydroxyl value: 315 mg KOH / g Polyol 3: Ethylenediamine-based polyether polyol (ethylenediamine and propylene oxide added together), product name: Exenol 750ED (AGC), hydroxyl value: 750 mg KOH / g Flame retardant: Tris(β-chloropropyl)phosphate, product name: TMCPP (manufactured by Daihachi Chemical Co., Ltd.) Foam stabilizer: Silicone compound, product name: L5420 (manufactured by Toray Dow) Catalyst 1: Tertiary amine, product name: POLYCAT201 (manufactured by EVONIK) Catalyst 2: Imidazole catalyst (N,N,N',N",N"-pentamethyldiethylenetriamine), product name: Kao Raiser No. 390 (manufactured by Kao Corporation) Foaming agent 1: Water Foaming agent 2: HFO, product name: LBA (1233ZE) (Honeywell) (Isocyanate: Liquid B) Isocyanate: Crude MDI, product name: Lupranate M20S (manufactured by BASF INOAC Polyurethanes)

[0071] 2. Evaluation Method (1) Combustion test The burning distance and burning time of polyurethane foam were measured using JIS A 9511. The polyurethane foam sample dimensions were 50 mm x 150 mm x 13 mm (thickness). The test results are shown in Table 1.

[0072] (2) Reactivity The reactivity (cream time, rise time) between the polyol-containing composition (liquid A) and the isocyanate (liquid B) was measured by the following method. The measurement results are shown in Table 1. Cream time: The time it takes for a mixture of liquids A and B to become cloudy and creamy was measured as the cream time (seconds). Rise time: The time until the foam stopped rising due to foaming in the above mixed liquid was measured as the rise time (seconds). In the above measurement, the time when mixing of the polyol-containing composition (liquid A) and the isocyanate (liquid B) was started was set as 0 seconds. The evaluation was performed by visual observation.

[0073] (3) Evaluation of the physical properties of polyurethane foam (3-1) Density (apparent density) The density was measured according to JIS K7222:2005, and the measurement results are shown in Table 1.

[0074] (3-2) Adhesive strength The adhesive strength (tensile strength) was measured using JIS A 9526:2017. Specifically, the temperature of liquid A and liquid B was adjusted to 10°C and stirred in a 1000mL disposable cup. The stirred liquid was foamed in a 200mm x 200mm x 300mm foam bag with a sample board (wood) placed on the bottom. The obtained sample with the board was cut together with the board into a square with one side of 50mm and a foam thickness of 30mm. The cut sample was bonded to a square metal jig with one side of 50mm on the bottom using urethane adhesive. At this time, the metal jig used had a hook so that it could be attached to a testing machine. The adhesive strength of the sample was then measured using the testing machine. The measurement results are shown in Table 1.

[0075] (3-3) Compressive strength The compressive strength was measured using JIS K 7200. Specifically, [0] the temperature of liquid A and liquid B were adjusted to 10°C, and the liquids were stirred in a 1000 mL disposable cup and foamed in a foam bag of 200 mm x 200 mm x 300 mm. The foamed material was cut into a square with a bottom surface of 100 mm on one side and a thickness of 30 mm. Five samples of the same size were prepared and measured. The measurement results are shown in Table 1.

[0076] (4) Biomass content of polyurethane foam The biomass degree of the polyurethane foam was calculated using the formula (3) shown in the above embodiment. The calculation results are shown in Table 1.

[0077] 3.Results As shown in Table 1, in Examples 1-6, the polyol-containing composition contained polyol 1 (aromatic polyol derived from cashew nut shell liquid, product name: NX5285, biomass degree: 93%), and the biomass degree was 2.2%-20.3%. On the other hand, in Comparative Examples 1 and 2, the polyol-containing composition did not contain polyol 1, and the biomass degree was 0.0%.

[0078] As shown in Table 1, the burning distance of Examples 1, 5, and 6 was shorter than that of Comparative Examples 1 and 2, and the flame retardancy was excellent. In addition, the burning distance of Example 2 was about the same as that of Comparative Example 1, and Examples 3 and 4 were about the same as that of Comparative Example 2, and the flame retardancy was about the same. As shown in Table 1, the burning time of Examples 1 and 3-6 was shorter and more flame retardant than those of Comparative Examples 1 and 2. The burning distance of Example 2 was shorter and more flame retardant than that of Comparative Example 1. As described above, in Examples 1-6, by using the aromatic polyol (polyol represented by the above structural formulas (1) and (2)) of polyol 1, it was possible to exhibit flame retardancy equivalent to or better than that of a composition not using an aromatic polyol. Such good flame retardancy is believed to be due to the presence of aromatic rings and alkylene side chains in the aromatic polyol of polyol 1.

[0079] As shown in Table 1, the adhesive strength of Example 1 was greater than those of Comparative Examples 1 and 2. The adhesive strength of Example 2 was similar to that of Comparative Example 1. Also, the adhesive strength of Examples 3-6 was 41N-164N, which is sufficient for practical use. Therefore, even in the case of a configuration using aromatic polyol (polyol represented by the above structural formulas (1) and (2)) as a raw material, adhesive strength sufficient for practical use was obtained. Such good adhesive strength is believed to be due to the presence of alkylene side chains in the aromatic polyol of polyol 1.

[0080] 4. Effects of the embodiment According to the above examples, polyurethane foams having sufficient flame retardancy and adhesiveness for practical use were obtained by using aromatic polyols (polyols represented by the above structural formulas (1) and (2)) as raw materials. In particular, it was found that polyurethane foams having sufficient flame retardancy and adhesiveness for practical use could be obtained by using aromatic polyols derived from cashew nut shells, which are renewable resource materials.

[0081] The present disclosure is not limited to the above-described embodiments, and various modifications and variations are possible.

Claims

1. A polyol-containing composition for obtaining a polyurethane foam, comprising: A polyol-containing composition containing an aromatic polyol that satisfies all of the following (i), (ii), and (iii): (i) Derived from cashew nut shells. (ii) The molecular weight is 500 or more. (iii) Having a phenolic hydroxyl group.

2. The polyol-containing composition of claim 1 , wherein the aromatic polyol has multiple benzene rings.

3. The polyol-containing composition according to claim 1 , wherein the aromatic polyol has an aromatic concentration of 10% or more.

4. The polyol-containing composition according to claim 1 , which is for application by a spray method.

5. A polyurethane foam obtainable from the polyol-containing composition according to any one of claims 1 to 4.

6. A polyol-containing composition for obtaining a polyurethane foam, comprising: Contains an aromatic polyol having a plurality of benzene rings each having a phenolic hydroxyl group, A polyol-containing composition.

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