Composition for soft polyurethane foam, soft polyurethane foam, and seat cushion for motor vehicle

Abstract

Provided is a composition for a soft polyurethane foam, which is capable of producing a soft polyurethane foam having reduced odor and also having excellent curability. The composition for a soft polyurethane foam contains a polyether polyol (A), a reactive amine catalyst (B) having at least one amino group and at least one hydroxyl group, a non-reactive amine catalyst (C) having at least one amino group and not having a hydroxyl group, and a silicone foam stabilizer (D). When a total of 100 parts by mass of the polyol component having no amino group is used, the reactive amine catalyst (B) is 0.01 to 1.3 parts by mass, the non-reactive amine catalyst (C) is 0.01 to 0.20 parts by mass, and the silicone foam stabilizer (D) is 0.2 to 1.5 parts by mass. The silicone foam stabilizer (D) contains two silicone substances (D1 and D2) having different surface tensions.

Description

Technical Field

[0001] The present disclosure relates to a composition for flexible polyurethane foam, a flexible polyurethane foam, and a seat pad for a motor vehicle. Background Art

[0002] Flexible polyurethane foams are widely used in seat pads for automobiles and the like due to their excellent cushioning properties. Meanwhile, various studies have been conducted on flexible polyurethane foams to improve their properties such as impact absorbency.

[0003] However, due to the raw materials used in the manufacturing process, the flexible polyurethane foam may emit odor that spreads in the vehicle or indoors, thereby negatively affecting comfort. In solving this problem, for example, PTL 1 discloses the production of a polyurethane foam by optimizing raw materials such as polyols as a composition for manufacturing a flexible polyurethane foam and by using a reactive amine catalyst to comprehensively suppress the generation of VOCs such as amines and styrenes that cause unpleasant odors.

[0004] Reference List

[0005] Patent Literature

[0006] PTL 1: WO2020 / 004123A1 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] However, when a load is applied (e.g., during demolding from a mold), odor suppression techniques tend to result in residual deformation, i.e., insufficient curability. Longer reaction times in the mold are required to impart the desired curability, resulting in reduced productivity. Therefore, when manufacturing flexible polyurethane foams, the above conventional compositions still have room for improvement in terms of reducing odor while improving curability.

[0009] Therefore, the present disclosure is directed to providing a composition for flexible polyurethane foam capable of producing a flexible polyurethane foam having reduced odor and excellent curability.

[0010] Furthermore, the present disclosure is directed to providing a flexible polyurethane foam having reduced odor and excellent curability, and a seat pad for an automobile including the flexible polyurethane foam.

[0011] Solutions for solving problems

[0012] Main features of the present disclosure for solving the above-mentioned problems are as follows.

[0013] [1] A composition for a flexible polyurethane foam, comprising:

[0014] Polyether polyol (A);

[0015] A reactive amine catalyst (B) which is a compound having one or more amino groups and one or more hydroxyl groups;

[0016] a non-reactive amine catalyst (C) which is a compound having one or more amino groups and no hydroxyl group; and

[0017] Silicone foam stabilizer (D),

[0018] wherein, when the total amount of the polyol component not having an amino group is considered to be 100 parts by mass, the content of the reactive amine catalyst (B) is 0.01 parts by mass or more and 1.3 parts by mass or less, the content of the non-reactive amine catalyst (C) is 0.01 parts by mass or more and 0.20 parts by mass or less, and the content of the silicone foam stabilizer (D) is 0.2 parts by mass or more and 1.5 parts by mass or less, and

[0019] The silicone foam stabilizer (D) comprises silicone (D1) having a surface tension of 22 mN / m or more and silicone (D2) having a surface tension of less than 22 mN / m, the surface tension being measured by a capillary rise method.

[0020] [2] The composition for flexible polyurethane foam according to [1], further comprising water (E), wherein the content of the water (E) is 2 parts by mass or more and 5 parts by mass or less, when the total amount of the polyol component having no amino group is assumed to be 100 parts by mass.

[0021] [3] The composition for flexible polyurethane foam according to [1] or [2], wherein the polyether polyol (A) comprises a polyether polyol having a weight average molecular weight of 6,000 or more.

[0022] [4] A flexible polyurethane foam obtained by mixing the flexible polyurethane foam composition according to any one of [1] to [3] with a polyisocyanate and foaming the mixture.

[0023] [5] The flexible polyurethane foam according to [4], wherein the core density measured according to JIS K7222 is 30 kg / m 3 Above and 75kg / m 3 the following.

[0024] [6] A seat pad for an automobile, comprising the flexible polyurethane foam according to [4] or [5].

[0025] Effects of the Invention

[0026] According to the present disclosure, a composition for a flexible polyurethane foam capable of producing a flexible polyurethane foam having reduced odor and excellent curability can be provided.

[0027] Furthermore, according to the present disclosure, it is possible to provide a flexible polyurethane foam having reduced odor and excellent curability, and a seat pad for an automobile including the flexible polyurethane foam. DETAILED DESCRIPTION

[0028] Hereinafter, the present disclosure will be described in detail based on embodiments of the present disclosure.

[0029] The compounds described in this specification may be partially or completely derived from fossil resources, biological resources such as plant resources, or renewable resources such as used tires. In addition, they may be derived from a mixture of two or more of fossil resources, biological resources, and renewable resources.

[0030] (Composition for flexible polyurethane foam)

[0031] A composition for flexible polyurethane foam according to an embodiment of the present disclosure (hereinafter, sometimes referred to as "the composition of the present embodiment") contains a polyether polyol (A), a reactive amine catalyst (B) as a compound having one or more amino groups and one or more hydroxyl groups, a non-reactive amine catalyst (C) as a compound having one or more amino groups and no hydroxyl group, and a silicone foam stabilizer (D). In the composition of the present embodiment, when the total amount of the polyol component having no amino group is considered to be 100 parts by mass, the content of the reactive amine catalyst (B) is 0.01 parts by mass or more and 1.3 parts by mass or less, the content of the non-reactive amine catalyst (C) is 0.01 parts by mass or more and 0.20 parts by mass or less, and the content of the silicone foam stabilizer (D) is 0.2 parts by mass or more and 1.5 parts by mass or less. In addition, the silicone foam stabilizer (D) contains a silicone (D1) having a surface tension of 22 mN / m or more and a silicone (D2) having a surface tension of less than 22 mN / m, the surface tension being measured by a capillary rise method.

[0032] In the present specification, a substituted amino group is also regarded as an "amino group".

[0033] In general, amine catalysts other than reactive amine catalysts (specifically, non-reactive amine catalysts) are generally volatile and are one of the causes of odor. However, it has been found that by using a reactive amine catalyst (B) as well as a non-reactive amine catalyst ((C) component) in the composition of the present embodiment, and setting the content of the reactive amine catalyst (B) to 0.01 parts by mass or more and 1.3 parts by mass or less, and setting the content of the non-reactive amine catalyst (C) to 0.05 parts by mass or more and 0.73 parts by mass or less when the total amount of the polyol component not having an amino group is considered to be 100 parts by mass, even if a non-reactive amine catalyst is included, a significant reduction in odor can be achieved.

[0034] In addition, with the composition of the present embodiment, high curability can be achieved by containing a non-reactive amine catalyst (C) in a predetermined amount, and the reactivity or liquid ductility during the reaction between the polyol and the polyisocyanate can be enhanced by using 2 specific components in a predetermined amount in the silicone foam stabilizer (D). In addition, when injected into a mold, it can spread in the entire mold before the urethanization reaction completely starts. As a result, even when injected into a mold with a complex shape, a polyurethane foam without defects can be obtained. Improved liquid ductility contributes to uniform reaction promotion of the polyurethane foam, and thus also improves curability.

[0035] Therefore, by using the composition of the present embodiment, a flexible polyurethane foam having reduced odor and excellent curability can be produced.

[0036] The following is a detailed description of each component that can be included in the composition of the present embodiment.

[0037] In this specification, the content of each component in the composition, such as the reactive amine catalyst (B), the non-reactive amine catalyst (C), the silicone foam stabilizer (D), etc., is indicated in principle as a ratio relative to the "total amount of the polyol component having no amino group", which is considered to be 100 parts by mass. The "polyol component having no amino group" generally corresponds to the polyether polyol (A), but may also include a polyol component other than the polyether polyol (A), such as polyhydric alcohols (e.g., glycerin) or a crosslinking agent as a polyol component.

[0038] <Polyether polyol (A)>

[0039] The composition of this embodiment contains a polyether polyol as component (A). Here, the polyether polyol generally refers to a polyoxyalkylene polyol obtained by ring-opening addition polymerization of an alkylene oxide and an initiator having two or more active hydrogen atoms. The polyether polyol (A) can be used alone or in combination of two or more.

[0040] It is preferred that the polyether polyol (A) used in the present embodiment includes a polyether polyol having a weight average molecular weight of 6,000 or more. In this case, riding comfort performance, particularly cushioning properties, can be improved.

[0041] The weight average molecular weight of the polyether polyol (A) used in the present embodiment is preferably in the range of 3,000 or more and 12,000 or less. This allows the hardness, resilience, stress relaxation and curability of the polyurethane foam to be balanced. From the same viewpoint, the weight average molecular weight of the polyether polyol (A) is more preferably 4,500 or more and 11,000 or less, and even more preferably 4,800 or more and 10,000 or less.

[0042] When adding polyether polyol (A) to the composition, the polyether polyol can be used as is, or a polymer polyol (generally, a polyol in which organic particles are dispersed in the polyether polyol) can be used. Specifically, the composition of the present embodiment may include the following as (A) component: a single polyether polyol, a single polymer polyol (generally, a polyol in which organic particles are dispersed in the polyether polyol) or a combination of a polyether polyol and a polymer polyol as described above. The polyether polyol included in this polymer polyol is also considered to be (A) component. In particular, it is preferred to use at least one polymer polyol, more preferably a combination of a polyether polyol and a polymer polyol. This can also be viewed from different viewpoints: relative to the total amount of the polyol component without amino groups per 100 mass parts, the composition of the present embodiment preferably contains more than 6 mass parts and less than 18 mass parts of organic particles. When within the above range, both defoaming effect and hardness retention can be achieved.

[0043] The organic particles are not particularly limited, but examples include organic particles of a copolymer of acrylonitrile and styrene, a homopolymer of acrylonitrile, and a homopolymer of styrene.

[0044] <Reactive amine catalyst (B)>

[0045] The composition of the present embodiment contains a reactive amine catalyst as the (B) component. Here, the reactive amine catalyst is a compound having one or more amino groups and one or more hydroxyl groups (OH groups).

[0046] Examples of the reactive amine catalyst (B) include amine catalysts such as monoethanolamine, diethanolamine, triethanolamine, dimethylethanolamine (DMEA), N,N,N'-trimethylaminoethylethanolamine, N,N-dimethylaminoethoxyethanol, N,N-dimethylaminohexanol, N,N-dimethylaminoethoxyhexanol, 2-[(2-[2-(dimethylamino)ethoxy]ethyl)methylamino]ethanol, 2-[[3-(dimethylamino)propyl]methylamino]ethanol, 1,1'-[[3-(dimethylamino)propyl]imino]bis-2-propanol and 2-hydroxymethyl-triethylenediamine. The reactive amine catalyst (B) can be used alone or in combination of two or more. Among them, 2-[(2-[2-(dimethylamino)ethoxy]ethyl)methylamino]ethanol is preferably used as the reactive amine catalyst (B).

[0047] When the total amount of the polyol component without amino groups is considered to be 100 parts by mass, the content of the reactive amine catalyst (B) in the composition of the present embodiment is 0.01 parts by mass or more and 1.3 parts by mass or less. If the content is less than 0.01 parts by mass, the odor reduction effect in the flexible polyurethane foam may not be fully achieved. If the content exceeds 1.3 parts by mass, the curability of the flexible polyurethane foam may be reduced, and cost disadvantages may occur. From the same viewpoint, the content of the reactive amine catalyst (B) is more preferably 0.03 parts by mass or more, even more preferably 0.05 parts by mass or more, and preferably 0.63 parts by mass or less, more preferably 0.58 parts by mass or less.

[0048] <Non-reactive amine catalyst (C)>

[0049] The composition of the present embodiment contains a non-reactive amine catalyst as the component (C). Here, the non-reactive amine catalyst (C) is a compound having one or more amino groups and having no hydroxyl group (OH group).

[0050] Examples of the non-reactive amine catalyst (C) include amine catalysts such as triethylamine, tripropylamine, tributylamine, hexadecyldimethylamine, N-methylmorpholine, N-ethylmorpholine, N-octadecylmorpholine, diethyltriamine, N,N,N',N'-tetramethylhexanediamine, N,N,N',N'-tetramethylpropylenediamine, N,N,N',N'",N'-pentamethyldiethylenetriamine, N,N',N'-trimethylaminoethylpiperazine, N,N-dimethylcyclohexylamine, N,N,N',N'-tetramethylethylenediamine and triethylenediamine. The non-reactive amine catalyst (C) may be used alone or in combination of two or more. Among them, triethylenediamine is preferably used as the non-reactive amine catalyst (C).

[0051] When the total amount of the polyol component not having an amino group is considered to be 100 parts by mass, the content of the non-reactive amine catalyst (C) in the composition of the present embodiment is 0.01 parts by mass or more and 0.20 parts by mass or less. If the content is less than 0.01 parts by mass, the curability of the soft polyurethane foam may be reduced. If the content exceeds 0.20 parts by mass, the odor from the soft polyurethane foam may become strong, negatively affecting the comfort in the car or indoors. From the same point of view, the content of the non-reactive amine catalyst (C) is more preferably 0.025 parts by mass or more, even more preferably 0.04 parts by mass or more, even more preferably 0.06 parts by mass or more, and preferably 0.196 parts by mass or less, even more preferably 0.192 parts by mass or less.

[0052] In the composition of this embodiment, the mass ratio of the content of the reactive amine catalyst (B) to the content of the non-reactive amine catalyst (C) ((B) / (C)) is preferably 0.09 or more and 8.0 or less. This ensures a better balance between the reduction of odor and the improvement of curability.

[0053] <Organic silicon foam stabilizer (D)>

[0054] The composition of the present embodiment contains an organosilicon foam stabilizer as the (D) component. The organosilicon foam stabilizer refers to a compound containing silicon, particularly a siloxane bond, and exhibiting a foam stabilizing effect during the manufacture of a flexible polyurethane foam. In the composition of the present embodiment, the (D) component includes an organosilicon (D1) having a surface tension of 22 mN / m or more and an organosilicon (D2) having a surface tension of less than 22 mN / m, the surface tension being measured by a capillary rise method. The organosilicon (D1) and the organosilicon (D2) can each be used alone or in combination of two or more.

[0055] When the total amount of the polyol component without amino groups is considered to be 100 parts by mass, the content (total content) of the silicone foam stabilizer (D) in the composition of the present embodiment is 0.2 parts by mass or more and 1.5 parts by mass or less. During the manufacture of polyurethane foam, it is important to maintain a balance between resinification reaction and foaming reaction. If the content is less than 0.2 parts by mass, the surface tension required for the foaming reaction cannot be fully imparted in the system, which may cause the bubbles to coarsen and the touch to deteriorate in the final polyurethane foam. In addition, if the content is less than 0.2 parts by mass, it may not be possible to produce foam and cause defect formation. On the other hand, if the content exceeds 1.5 parts by mass, the independent bubble rate in the polyurethane foam may become too high because the air inside cannot escape during the defoaming process and cause cracks (perforations) in the foam. From the same point of view, the content of the silicone foam stabilizer (D) is preferably 0.3 parts by mass or more, and more preferably 0.9 parts by mass or less.

[0056] <Water(E)>

[0057] The composition of the present embodiment preferably contains water as (E) component. Water reacts with polyisocyanate to produce carbon dioxide gas, which is used as a foaming agent during the manufacture of soft polyurethane foam. When it is considered that the total amount of the polyol component without amino group is 100 parts by mass, the content of water (E) in the composition of the present embodiment is preferably more than 2 parts by mass and less than 5 parts by mass. In this case, good seat comfort and riding comfort can be ensured. The density of polyurethane foam can be controlled by adjusting the amount of water to a predetermined amount, and the reaction promotion effect (especially, the effect of promoting the reaction of forming urea bonds, and the effect of promoting the whole reaction system including carbamate reaction by the heat generated by the progress of urea bond formation reaction) can be expected. From the same point of view, when it is considered that the total amount of the polyol component without amino group is 100 parts by mass, the content of water (E) is more preferably more than 2.1 parts by mass, even more preferably more than 2.2 parts by mass, and more preferably less than 4.7 parts by mass, even more preferably less than 4.5 parts by mass, and further preferably less than 4.4 parts by mass.

[0058] <Other components>

[0059] In addition to the above-mentioned components (A) to (E), the composition of the present embodiment may further contain other components as required. Examples of other components include polyol components (such as polyhydric alcohol and polyester polyol) other than polyether polyol (A); catalysts other than reactive amine catalysts (B) and non-reactive amine catalysts (C); and foam stabilizers other than silicone foam stabilizers (D); and foaming agents other than water (E). Polyhydric alcohols such as ethylene glycol, 1,3-propylene glycol, 1,4-butylene glycol and glycerol can be mentioned as examples of the above-mentioned polyols.

[0060] However, from the viewpoint of obtaining the desired properties as a flexible polyurethane foam, it is preferred that the composition of this embodiment does not contain a polyester polyol. This is because, for example, in applications such as automotive seats that are expected to be used for many years, easily hydrolyzed polyester polyols may cause negative effects.

[0061] From the viewpoint of obtaining the desired properties as a flexible polyurethane foam, it is also preferred that the composition of the present embodiment substantially does not contain a catalyst other than the reactive amine catalyst (B) and the non-reactive amine catalyst (C). For example, it is preferred that the composition of the present embodiment does not contain a metal-based catalyst such as tin to obtain a more environmentally friendly polyurethane foam. In addition, a catalyst having a higher catalytic activity than the amine-based catalyst used in the present embodiment may excessively increase the independent cell rate during the foaming reaction, potentially causing deformation of the polyurethane foam.

[0062] (Soft polyurethane foam)

[0063] The flexible polyurethane foam of one embodiment of the present disclosure (hereinafter referred to as "the flexible polyurethane foam of the present embodiment") is obtained by mixing the composition for flexible polyurethane foam as described above with polyisocyanate and then foaming. Since this flexible polyurethane foam of the present embodiment is obtained using the composition as described above, it has reduced odor and excellent curability.

[0064] "Flexible polyurethane foam" refers to a polyurethane foam having interconnected cells and recovery under load.

[0065] Examples of polyisocyanates include toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate, triphenyl diisocyanate, xylylene diisocyanate, polymethylene polyphenylene polyisocyanate, methylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, o-toluidine diisocyanate, naphthylene diisocyanate, xylylene diisocyanate, lysine diisocyanate and derivatives thereof. The polyisocyanate may be used alone or in combination of two or more. In particular, from the viewpoint of the density of the resulting flexible polyurethane foam, it is preferred to use only MDI or a combination of TDI and MDI. When a combination of TDI and MDI is used, the ratio (mass ratio) of TDI:MDI is preferably between 70:30 and 90:10.

[0066] The amount of polyisocyanate used, which is expressed as the number of isocyanate groups per 100 times the total number of active hydrogen atoms in the polyether polyol and water, etc. (this value is called the isocyanate index), is preferably 80 or more and 120 or less. If the isocyanate index is 80 or more, the shrinkage of the resulting soft polyurethane foam can be fully suppressed. If the index is 120 or less, the collapse of the foam can be fully suppressed. From the same viewpoint, the isocyanate index is more preferably 95 or more, and more preferably 115 or less.

[0067] The flexible polyurethane foam of the present embodiment can be obtained by mold forming. Specifically, in this method, the composition for flexible polyurethane foam as described above and polyisocyanate are first mixed to prepare a foaming stock solution. Next, the flexible polyurethane foam can be obtained by injecting the foaming stock solution into the cavity of the mold and performing mold forming (foaming) at a temperature of 50 to 65° C. and a curing time of 5 to 7 minutes according to a conventional method.

[0068] After forming, the flexible polyurethane foam may be subjected to a crushing treatment using a roller, etc. The crushing treatment is a process of breaking the cell membranes of cells formed during foaming to communicate the cells, with the aim of stabilizing the shape of the foam and suppressing shrinkage.

[0069] The core density of the flexible polyurethane foam of the present embodiment measured according to JIS K7222 is preferably 30 kg / m 3 Above and 75kg / m 3 This ensures good seat comfort and riding comfort. The core density can be adjusted by changing the amount of blowing agent in the soft polyurethane foam composition. It is particularly preferred to set the core density to 30 to 45 kg / m 3 The soft polyurethane foam is used as a back pad placed on the back. On the other hand, it is particularly preferred to have a core density greater than 45 to 75 kg / m 3 The soft polyurethane foam is used as a cushion placed on the seat surface.

[0070] (Motor vehicle seat cushion)

[0071] A seat pad for an automobile according to an embodiment of the present disclosure (hereinafter referred to as "seat pad of the present embodiment") includes the soft polyurethane foam as described above. Since the seat pad of the present embodiment is manufactured using the polyurethane foam as described above, it has reduced odor and excellent curability.

[0072] Example

[0073] Hereinafter, the present disclosure will be described in further detail with reference to Examples. However, these Examples are intended only to illustrate and are not intended to limit the present disclosure in any way. In Tables 1 and 2, the content of component (C) is listed to the 3rd decimal place, the content of components (B) and (D) is listed to the 2nd decimal place, and the content of components (A) and (E) is listed to the 1st decimal place.

[0074] A composition for flexible polyurethane foam was prepared according to a conventional method based on the formulations summarized in Table 1 and Table 2. Note that in the formulation, "polyol component having no amino group" refers to polyether polyol and polyether polyol contained in polymer polyol.

[0075] Next, the polyurethane foam is prepared by mixing the obtained flexible polyurethane foam composition with polyisocyanate (“ 1021", manufactured by Tosoh Corporation) was mixed to obtain an isocyanate index of 100, and molded (foamed) to produce a soft polyurethane foam. In Comparative Examples 1 and 2 and Example 1, the amount of water used as a blowing agent was adjusted to obtain a foaming weight of 38 kg / m 3 In Comparative Examples 3 and 4 and Example 2, the amount of water was adjusted to obtain a core density of 50 kg / m 3 core density.

[0076] (Evaluation of odor)

[0077] For the obtained flexible polyurethane foam of each example, 6 samples of 10 cm×10 cm×20 mm in thickness were prepared, and the odor (odor intensity, comfort, and odor over time) was evaluated according to TSM 0505G. The evaluation results of odor intensity and comfort of Comparative Examples 1 and 2 and Example 1 are summarized in Table 1, and the evaluation results of odor over time of Comparative Examples 3 and 4 and Example 2 are summarized in Table 2. In all cases, a smaller value indicates reduced odor.

[0078] (Evaluation of curability)

[0079] After the mold was formed, the hardness of the soft polyurethane foam at the time of demolding was measured for each example. The measured value of Comparative Example 1 was set to 100 and used as an index for Comparative Examples 1, 2 and Example 1. Similarly, the measured value of Comparative Example 3 was set to 100 and used as an index for Comparative Examples 3, 4 and Example 2. The results are summarized in Tables 1 and 2. A higher value indicates better curability.

[0080] [Table 1]

[0081]

[0082] [Table 2]

[0083]

[0084] *1: Polyether polyol: "SPECFLEX NC632 Polyol DA", manufactured by Dow Chemical, weight average molecular weight: 7,000

[0085] *2: Polymer polyol: "SANNIX KC-863", manufactured by Sanyo Chemical Industries Ltd., weight average molecular weight of polyether polyol contained: 5,400

[0086] *3: Reactive amine catalyst 1: Diethanolamine, manufactured by Nippon Shokubai Co., Ltd.

[0087] *4: Reactive amine catalyst 2: "RZETA-HD", manufactured by Tosoh Corporation, containing 25 to 40% by mass of a structure having triethylenediamine as a main skeleton and containing hydroxyl groups

[0088] *5: Reactive amine catalyst 3: "JEFFCAT ZF10", manufactured by Huntsman Corporation, 2-[[2-[2-(dimethylamino)ethoxy]ethyl]methylamino]ethanol

[0089] *6: Non-reactive amine catalyst 1: "DABCO 33LV", manufactured by Evonik, containing 33% by mass of triethylenediamine

[0090] *7: Non-reactive amine catalyst 2: "TOYOCAT-ET33B", manufactured by Tosoh Corporation, containing 23% by mass of bis(2-dimethylaminoethyl) ether

[0091] *8: Silicone foam stabilizer 2-1: "Niax Silicone L-3628J", manufactured by Momentive Performance Materials Japan LLC, surface tension: 21 mN / m (estimated value)

[0092] *9: Silicone foam stabilizer 2-2: "Niax Silicone L-3627J", manufactured by Momentive Performance Materials Japan LLC, surface tension: 21 mN / m

[0093] *10: Silicone foam stabilizer 1: "Niax Silicone L-3647J", manufactured by Momentive Performance Materials Japan LLC, surface tension: 23 mN / m

[0094] *11: It expresses the polyether polyol (contained in the polymer polyol) in parts by mass. (In Comparative Examples 1, 2 and Example 1, the amount of organic particles (contained in the polymer polyol) is 7.3 parts by mass, and in Comparative Examples 3, 4 and Example 2, the amount of organic particles (contained in the polymer polyol) is 15.7 parts by mass.)

[0095] As can be seen from Tables 1 and 2, the flexible polyurethane foams in Examples have reduced odor and excellent curability.

[0096] In particular, as disclosed in the present specification, a relatively low density formulation such as Example 1 in Table 1 exhibits better effects in reducing odor intensity and comfort, while a relatively high density formulation such as Example 2 in Table 2 exhibits better effects in reducing odor over time.

[0097] Industrial Applicability

[0098] According to the present disclosure, a composition for a flexible polyurethane foam capable of producing a flexible polyurethane foam having reduced odor and excellent curability can be provided.

[0099] Furthermore, according to the present disclosure, it is possible to provide a flexible polyurethane foam having reduced odor and excellent curability, and a seat pad for an automobile including the flexible polyurethane foam.

Claims

1. A composition for flexible polyurethane foam, comprising: Polyether polyol (A); A reactive amine catalyst (B) which is a compound having one or more amino groups and one or more hydroxyl groups; a non-reactive amine catalyst (C) which is a compound having one or more amino groups and no hydroxyl group; and Silicone foam stabilizer (D), in, When the total amount of the polyol component not having an amino group is considered to be 100 parts by mass, the content of the reactive amine catalyst (B) is 0.01 parts by mass or more and 1.3 parts by mass or less, the content of the non-reactive amine catalyst (C) is 0.01 parts by mass or more and 0.20 parts by mass or less, and the content of the silicone foam stabilizer (D) is 0.2 parts by mass or more and 1.5 parts by mass or less, and The organosilicon foam stabilizer (D) comprises an organosilicon (D1) having a surface tension of 22 mN / m or more and an organosilicon (D2) having a surface tension of less than 22 mN / m, wherein the surface tension is measured by a capillary rise method.

2. The composition for flexible polyurethane foam according to claim 1, further comprising water (E), wherein: The content of the water (E) is 2 parts by mass or more and 5 parts by mass or less when the total amount of the polyol component having no amino group is considered to be 100 parts by mass. 3 . The composition for flexible polyurethane foam according to claim 1 , wherein the polyether polyol (A) comprises a polyether polyol having a weight average molecular weight of 6,000 or more.

4. A soft polyurethane foam, characterized in that: The flexible polyurethane foam is obtained by mixing the flexible polyurethane foam composition according to any one of claims 1 to 3 with polyisocyanate and foaming the mixture.

5. The flexible polyurethane foam according to claim 4, wherein the core density measured according to JIS K7222 is 35 kg / m 3 Above and 75kg / m 3 the following.

6. A seat cushion for an automobile, comprising the soft polyurethane foam according to claim 4 or 5.

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