JPH0610237B2 - Composition for flexible polyurethane foam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel and useful flexible polyurethane foam capable of heat fusion which is excellent in stable production of a stock solution, mechanical properties of foam and scorch resistance of foam.

More specifically, it relates to a flexible polyurethane foam which comprises using a specific terminal OH group-containing urethane prepolymer and a specific polyester ether polyol.

Various attempts have heretofore been made for imparting heat fusion property to a soft urethane foam. For example, a method using a phosphorus-containing polyether polyol (Japanese Patent Publication No. 48-376).
No. 00), a method of adhering phosphoric acid to at least one of a urethane foam and a base material before flame lamination (Japanese Patent Publication No. 47-6519), or a polyoxyalkylene polyol, a polycarboxylic acid anhydride, and a cyclic ether compound. A method (Japanese Patent Publication No. 46-30309) using a urethane foam composed of a polyester ether polyol composed of the above and an organic phosphorus compound is known. However, in any of these methods, (i) the stability of the stock solution is poor, (ii) the mechanical properties of the foam are inferior, (ii)
It was not perfect because there were problems such as i) the heat fusion property was not sufficient and there was no adhesive force depending on the type of adherend, and (iv) the scorch during the production of the foam was large.

However, the present inventors have completed the invention of the present application as a result of earnest research to eliminate these various defects in view of the various defects of the prior art as described above.

That is, the present invention is a polyhydroxy compound, a polyisocyanate, a foaming agent,
In a composition for a flexible polyurethane foam comprising a foam stabilizer and a catalyst, (A) a low molecular weight polyhydroxy compound having a molecular weight of 60 to 300 and a functional group number of 2 to 4, (B) a polyoxyalkylene polyol having a molecular weight of 300 to 5000, ( C) Aromatic nucleus-containing diol obtained by adding an alkylene oxide to an aromatic dihydroxy compound having a molecular weight of 230 to 5000, (D) <Alcohol component> Polyoxyalkylene glycol alone having a molecular weight of 300 to 5000, or a low molecular weight polyhydroxy compound ( A) in combination with <acid component> aliphatic dicarboxylic acid, aromatic dicarboxylic acid,
And a polyester ether polyol having a molecular weight of 500 to 6000, which is obtained by using at least one of their anhydrides and various derivatives, (E) <Alcohol component> Obtained by adding an alkylene oxide to an aromatic dihydroxy compound. Molecular weight is 2
30 to 5000 aromatic diol containing diol alone or combined use of low molecular weight polyhydroxy compound (A), <acid component> C3 to C6 aliphatic dicarboxylic acid and / or aromatic dicarboxylic acid or anhydride thereof Polyester ether polyol having a molecular weight of 500 to 6000, which is obtained by using at least one of the above compounds and various derivatives, (F) <Alcohol component> The molecular weight obtained by adding an alkylene oxide to an aromatic dihydroxy compound is 2
30-5000 aromatic nucleus-containing diol alone or in combination with a low molecular weight polyhydroxy compound (A), <acid component> aromatic dicarboxylic acid and long-chain aliphatic dicarboxylic acid having 7 to 14 carbon atoms, or those Polyester ether polyol having a molecular weight of 500 to 6000 obtained from an anhydride or a mixture of various derivatives, (G) polyoxytetramethylene glycol having a molecular weight of 500 to 5000, (H) a low molecular weight polyhydroxy compound and an aliphatic dicarboxylic acid. Acid, an aromatic dicarboxylic acid, an anhydride thereof, or a polylactone-based polyester polyol obtained by polymerizing an acid-alcohol condensed polyester polyol obtained from at least one of various derivatives and / or ε-caprolactone, as the polyhydroxy compound, (A) ~ (H ) Component OH group-containing urethane prepolymer obtained by the reaction of at least one polyol with polyisocyanate, and at least one of the polyester ether polyols of (D), (E) and (F) above. A flexible polyurethane foam composition characterized by being used in combination.

The low molecular weight polyhydroxy compound as the component (A) of the present invention has a functional group number of 2 to 4 and a molecular weight of 60 to 300, for example, ethylene glycol. 1,2-propylene glycol, 1,3-propylene glycol, diethyl glycol, 1,3-butylene glycol, 1,4-butylene glycol, 1,6-hexamethylene glycol, bishydroxyethoxybenzene or p-xylene glycol, A glycol such as neopentyl glycol, a polyfunctional polyhydroxy compound such as glycerin, trimethylolpropane, hexanetriol, triethanolamine, pentaerythritol, and ethylenediamine can be used.

Further, as the component (B) polyoxyalkylene glycol, a low molecular weight polyhydroxy compound having a functional group of 2 to 4, for example, the compound used in the component (A) is an alkylene oxide (ethylene oxide, propylene oxide, butylene Oxide, styrene oxide, epichlorohydrin) is added to obtain a molecular weight of 300-
5000 can be used.

The alkylene oxide adduct of the aromatic dihydroxy compound as the component (C) has a molecular weight of 230 to 5000,
Preferably, the aromatic nucleus-containing polyether diol in the range of 250 to 2000 is referred to, and typical examples of the aromatic dihydroxy compound include catechol, hydroquinone or bishydroxyethoxybenzene, or a general formula. Or general formula Although there is an aromatic dihydroxydiphenyl compound represented by, bisphenol A, bisphenol F or bisphenol S is particularly preferable when taking into consideration the availability of raw materials and the physical properties as a flexible polyurethane foam. Typical examples of the alkylene oxide used for addition with an aromatic dihydroxy compound are ethylene oxide, propylene oxide, epichlorohydrin, 1,2-butylene oxide and a mixture thereof.

The polyester ether polyol as the component (D) is
A polyoxyalkylene glycol having a molecular weight of 300 to 5000 alone or in combination with a low molecular weight polyhydroxy compound is used as the alcohol component, and these can be the same as the components (B) and (A). on the other hand,
The aliphatic dicarboxylic acid as an acid component has 3 to 14 carbon atoms.
Preferred are, for example, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, 1,9-nonamethylenedicarboxylic acid,
1,10-decamethylene dicarboxylic acid, 1,11-undecamethylene dicarboxylic acid, 1,12-dodecamethylene dicarboxylic acid and the like can be mentioned. The aromatic dicarboxylic acid includes, for example, orthophthalic acid, isophthalic acid, terephthalic acid, naphthalene dicarboxylic acid, anthracene dicarboxylic acid or phenanthrene dicarboxylic acid, but it goes without saying that their anhydrides or various derivatives can also be used. ,, these may be used as a mixture of two or more,
Particularly preferred is orthophthalic acid, isophthalic acid or terephthalic acid.

Molecular weight of 230 to 500 obtained by adding alkylene oxide to aromatic dihydroxy compound as component (E)
The aromatic nucleus-containing diol of 0 may be the same as the component (C). As the polyhydroxy compound used in combination as the alcohol component, the same polyhydroxy compound as the component (A) is used. As the aliphatic dicarboxylic acid as the acid component, those having 3 to 6 carbon atoms are used, and examples thereof include malonic acid, succinic acid, glutaric acid and adipic acid used in the component (D). Further, as the aromatic dicarboxylic acid, the same one as the component (D) can be used.

The polyester ether polyol as the component (F) is
The molecular weight is 500 to 6000, and the aromatic nucleus-containing diol is
The component (C) can be used as it is. Further, as the low molecular weight polyhydroxy compound, the same compound as the above-mentioned component (A) can be used. As the long-chain aliphatic dicarboxylic acid, those having 7 to 14 carbon atoms are suitable.
Among the dicarboxylic acids listed as the component (D), pimelic acid to 1,12-dodecamethylenedicarboxylic acid can be used. Azelaic acid having preferably 9 or 10 carbon atoms,
It is sebacic acid. When an aliphatic dicarboxylic acid having a carbon number of 6 or less is used, the elongation of the flexible urethane foam decreases, and conversely, when 15 or more is used, the hardness and strength of the foam decrease. However, both are not preferable. The aromatic dicarboxylic acid is
What is described in the component (D) is used.

The aromatic dicarboxylic acid and the long-chain aliphatic dicarboxylic acid are used in a molar ratio of 1/9 to 9/1, but 5/5 to 9/1 in terms of mechanical properties of the resulting foam. Ranges are preferred.

On the other hand, as described above, which is used in carrying out the method of the present invention,
As the component (G), polyoxytetramethylene glycol having a molecular weight of 500 to 5000 can be used.

As the component (H), at least one of the same low molecular weight polyhydroxy compound as the component (A) and the same aliphatic and aromatic dicarboxylic acid as the component (D), their anhydrides, and various derivatives are used. The obtained acid-alcohol condensed polyester polyol and a mixture thereof, or the lactone polyester polyol obtained by polymerizing ε-caprolactone and a mixture thereof can be used.

In order to prepare the polyester ether polyol or the polyester polyol using the raw materials as listed above, a conventionally known esterification technique performed using a vacuum and / or a catalyst can be adopted.
Among them, as a typical one, a method of reacting glycols and dicarboxylic acids under normal pressure, a method of esterification under vacuum, or after esterification in the presence of an inert solvent such as toluene, There is a method in which the condensed water and the solvent are azeotropically distilled to remove them out of the reaction system.

It is of course possible to carry out the reaction in the absence of a catalyst, but usually, in order to make the esterification reaction proceed smoothly, inorganic acids or organic acids; Li, Na, K, Rb, Ca, Mg, Sr , Z
n, Al, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Pd, Sn, Sb or Pb
Such as metal chlorides, oxides, hydroxides or acetic acid, fatty acid salts such as oxalic acid, octylic acid, lauric acid or naphthenic acid; sodium methylate, sodium ethylate, aluminum triisopropoxide, isopropyl titanate Or alcoholates such as n-butyl titanate; phenolates such as sodium phenolate; or other conventional organometallic compounds such as other organometallic compounds of metals such as Al, Ti, Zn, Sn, Zr or Pb. Preference is given to using all catalysts used for transesterification. In that case, the amount of the catalyst used is appropriately in the range of 0.00001 to about 5% by weight, preferably 0.001 to 2% by weight, based on the total amount of the raw materials for preparing the polyester diol. And the reaction temperature at this time is usually 100 to 25
It is in the range of 0 ° C.

The terminal OH group-containing urethane prepolymer of the present invention can be produced by using the above-mentioned raw materials based on a usual urethane prepolymer production method. That is, 50 to 100 ° C., OH / NCO = 1 to 5/1 (molar ratio) in a nitrogen atmosphere, preferably 1.2 to 1.5 /
It can be produced by a general method or a sequential reaction method at 1 (molar ratio).

The polyisocyanate used in the present invention includes 2,4
-Tolylene diisocyanate or 2,6-tolylene diisocyanate or mixtures thereof, m- or p
-Phenylene diisocyanate, p-xylene diisocyanate, ethylene diisocyanate, tetramethylene-1,4-diisocyanate, hexamethylene-1,6-diisocyanate, diphenylmethane-4,4'-diisocyanate, 3,3'-dimethyl-diphenylmethane-4, 4'-
Diisocyanate, 3,3'-dimethyl-4,4'-biphenylene diisocyanate, 3,3'-dichloro-4,4'-biphenylene diisocyanate, 4,4'-biphenylene diisocyanate or 1,5-naphthalene diisocyanate, crude diphenylmethane diisocyanate And various derivatives of diphenylmethane diisocyanate.

In the case of combining the urethane prepolymer containing a terminal OH group and (D), (E), or a polyester ether polyol of (F) in the practice of the present invention, a polyol containing an aromatic nucleus is used in at least one of them. Is preferred. By introducing aromatic nuclei, it is possible to increase the strength of the foam,
Further, the heat fusion strength can be increased. However,
In this case, since the viscosity of the undiluted solution may increase depending on the combination, it is important to introduce aromatic nuclei into one of the components so that the viscosity is retained within a usable range. The terminal OH group-containing urethane prepolymer is obtained by reacting at least one polyol of the components (A) to (H) with a polyisocyanate. For example, when it is used in two components, (A) (B),
(A) (C), (A) (G), (A) (D), (A) (E), (A) (F), (A) (H) are used in combination in the order of polyol. Is preferred.
Further, it is preferable to use the polyester ether polyols (F), (E) and (D) in combination with the urethane prepolymer in the order of priority.

The combination of the terminal OH group-containing urethane prepolymer and the polyester ether polyol component used in the present invention,
A synergistic effect is exhibited as a heat-fusible flexible polyurethane foam. That is, the terminal OH group-containing urethane prepolymer,
Recombinat by chemical bond when flame (flame) is applied
Inducing ion (recombination), strengthening the adhesive force with the base material,
In addition, the polyester ether polyol increases the cohesive force resulting from the ester bond and the decomposition temperature of the foam, forms a molten state when heated, and enhances the adhesive force by penetrating and curing the base material.

For this reason, by combining the above-mentioned specific components, extremely excellent properties can be exhibited.

As described above, the terminal OH group-containing urethane prepolymer and polyester ether polyol characteristically used in the practice of the present invention are extremely excellent in stability of the undiluted solution, foam physical properties, heat fusion property and scorch resistance. Since it gives a heat-fusible flexible polyurethane foam,
Although the above-mentioned specific components should be exclusively used, if necessary, the number of functional groups is 2 to 8 and the molecular weight is 500 to 7
000, for example, polyoxypropylene polyol, polyoxyethylene polyol and polyoxyethylene propylene polyol (block or random polymer), polyether polyol such as polyoxytetramethylene glycol or adipic acid such as polyethylene adipate and polybutylene adipate. Never prevent the use of polyester-based polyols, lactone-based polyester polyols and polyols containing polyfunctional components (trimethylolpropane, pentaerythritol, hexanetriol) mixed with the above-mentioned specific polyols within the range not impairing the physical properties. Not a thing.

The above raw materials may be used to produce a flexible polyurethane foam by a conventionally known method such as a one-shot method or a prepolymer method. The prepolymer method is a method in which a polyhydroxy compound and a polyisocyanate are previously reacted to obtain a kind of prepolymer, and then this is reacted with a polyhydroxy compound in the presence of a foaming agent, a catalyst, a foam stabilizer and other additives. , Or the one-shot method,
It is a method of reacting an organic polyisocyanate with a polyhydroxy compound in the presence of a catalyst, a foaming agent, a foam stabilizer, and other additives, and a flexible polyurethane foam can be produced by these methods. Here, as the polyisocyanate, the above-mentioned ones can be used.

The catalyst used in the present invention may be one commonly used in the production of polyurethane foams, and examples thereof include organotin compound catalysts and amine catalysts. Examples of organotin compound catalysts include stannous octoate, stannous oleate, dibutyltin dilaurate, and dibutyltin di-2.
-Ethyl hexoate, dibutyltin diacetate and the like.

In the present invention, the foam stabilizer used may be a general silicone foam stabilizer for producing polyurethane foam.

Further, in the present invention, water (which produces carbon dioxide gas when reacted with an organic isocyanate) is mainly used as a foaming agent, but if necessary, a low boiling point organic compound such as monofluorotrichloromethane or methylene chloride is used. Compounds and air can also be used.

In addition to the above-mentioned compounding components, a filler, an antistatic agent, a colorant, a flame retardant and the like can be added depending on the performance required of the foam without departing from the object of the present invention.

Next, examples of the present invention will be described, but the present invention is not limited thereto. All “parts” and “%” in the text are based on weight.

Example 1 134 parts of trimethylolpropane, 3000 parts of polyoxypropylene diol having a molecular weight of 1000 and 2,4 / 2,6-tolylene diisocyanate (2,4 / 2,6 = 80/20 mixture,
Hereinafter referred to as TDI-80) 522 parts under nitrogen gas atmosphere 8
The reaction was carried out at 0 ° C. to prepare a urethane prepolymer containing terminal OH groups (hydroxyl value = 46.5).

In addition, polyoxypropylene diol 2 having a molecular weight of 400
A polyester ether polyol (hydroxyl value = 53.0) was prepared from 800 parts, 1280 parts of adipic acid and 390 parts of diethylene glycol.

20 parts of the above-mentioned urethane prepolymer containing terminal OH groups, 20 parts of polyester ether polyol, and 60 parts of polyoxypropylene triol having a molecular weight of 3000 were mixed, and 0.1 part of triethylenediamine was dissolved in 4.0 parts of water, silicon L-540 ( (Manufactured by Nippon Unitika) 1.0 part, stanna octoate 0.20 part, and TDI-80 49.
After adding 3 parts (NCO index 105) and stirring vigorously, it was poured into an appropriate mold to obtain a flexible polyurethane foam [I].

Example 2 2000 parts of polyoxypropylene diol having a molecular weight of 2000 was reacted with 348 parts of TDI-80 at 80 ° C. under a nitrogen atmosphere to obtain a urethane polymer containing NCO groups at both ends. Next, 212 parts of diethylene glycol were reacted under the same conditions to prepare a terminal OH group-containing urethane prepolymer. (Hydroxyl value = 43.8) A polyester ether polyol having a molecular weight of 2000 was prepared from an aromatic nucleus-containing diol having a molecular weight of 600 obtained by adding propylene oxide to bisphenol A and adipic acid.

A mixture of 20 parts of the urethane prepolymer containing terminal OH groups, 20 parts of polyester ether polyol and 60 parts of polyoxypropylene triol having a molecular weight of 3000 was foamed in the same manner as in Example 1 to obtain a flexible polyurethane foam [II].

Example 3 Polyoxypropylene diol 2800 having a molecular weight of 400
Part, adipic acid 1280 parts, diethylene glycol 39
Polyester polyol obtained from 0 parts (hydroxyl value =
53.0) was obtained. The obtained polyester polyol 212
0 part of TDI-80 348 parts was reacted to form a terminal NCO group-containing prepolymer, and then neopentyl glycol 208
The parts were reacted to obtain a urethane prepolymer containing terminal OH groups (hydroxyl value = 42.0).

Further, a polyester ether polyol having a molecular weight of 2000 was prepared from an aromatic nucleus-containing diol having a molecular weight of 600 obtained by adding propylene oxide to bisphenol A and isophthalic acid.

A mixture of 15 parts of the urethane prepolymer containing terminal OH groups and 15 parts of polyester ether polyol in 70 parts of polyoxypropylene triol having a molecular weight of 3000 was foamed in the same manner as in Example 1 to obtain a flexible polyurethane foam [III]. .

Example 4 TD was added to 1000 parts of an aromatic nucleus-containing diol having a molecular weight of 1000 and obtained by adding propylene oxide to bisphenol A.
I-80 (348 parts) was reacted to obtain a terminal NCO group-containing urethane prepolymer, and then 124 parts of ethylene glycol was reacted to obtain a terminal OH group-containing urethane prepolymer (hydroxyl value = 76.0).

In addition, polyoxypropylene diol 4 having a molecular weight of 600
82 parts, ethylene glycol 25 parts and adipic acid 14
A polyester ether polyol having a molecular weight of 3000 was prepared from 6 parts.

A mixture of 18 parts of the urethane prepolymer containing terminal OH groups and 20 parts of polyester ether polyol in 62 parts of polyoxypropylene triol having a molecular weight of 3000 was foamed in the same manner as in Example 1 to obtain a flexible polyurethane foam [IV].

Example 5 2000 parts of a polyester ether polyol having a molecular weight of about 2000, which is obtained from an aromatic nucleus-containing diol having a molecular weight of 600, which is obtained by adding propylene oxide to bisphenol A, and adipic acid are reacted with 348 parts of NDI-terminated urethane prepolymer. A polymer is obtained, then 12
A urethane prepolymer containing terminal OH groups was obtained by reacting 4 parts of ethylene glycol. (Hydroxyl value = 45.5) Polyoxypropylene diol 3 with a molecular weight of 400
81 parts, ethylene glycol 20 parts and isophthalic acid 1
A polyester ether polyol having a molecular weight of 2000 consisting of 66 parts was prepared.

A mixture of 10 parts of the above-mentioned urethane prepolymer containing terminal OH groups and 20 parts of polyester ether polyol with 70 parts of polyoxypropyl tetrol having a molecular weight of 4000 was foamed in the same manner as in Example 1 to give a flexible polyurethane foam [V].
Got

Example 6 Aromatic nucleus-containing polyether having a molecular weight of 600 obtained by adding propylene oxide to bisphenol A,
Trimethylolpropane and sebacic acid / isophthalic acid = 3/7 (molar ratio) are used to contain about 3% trimethylolpropane in the molecule. TDI-80 174 in 920 parts of polyester ether polyol having a hydroxyl value of 61.0 and an acid value of 0.17
Parts were reacted to obtain a terminal NCO group-containing urethane prepolymer, and then 106 parts of diethylene glycol were reacted to obtain a terminal OH group-containing urethane prepolymer.

In addition, polyoxypropylene diol 3 having a molecular weight of 400
A polyester ether polyol having a molecular weight of 2000 was prepared from 80 parts, 28 parts of 1,4-butylene glycol, 83 parts of isophthalic acid and 73 parts of adipic acid.

A mixture of 15 parts of the prepolymer containing terminal OH groups and 15 parts of polyester ether polyol and 70 parts of polyoxypropylene triol having a molecular weight of 3000 was foamed in the same manner as in Example 1 to obtain a flexible urethane foam [VI].

Example 7 2000 parts of polyoxytetramethylene glycol having a molecular weight of 2000 was reacted with 348 parts of TDI-80 to obtain a urethane prepolymer containing a terminal NCO group, and then 180 parts of 1,4-butanediol was reacted to contain a terminal OH group. A urethane prepolymer was obtained.

Further, an aromatic nucleus-containing polyether polyol having a molecular weight of 800 obtained by adding propylene oxide to bisphenol A, and azelaic acid / isophthalic acid = 4/6
From the (molar ratio), a polyester ether polyol having a molecular weight of 2500 was prepared.

A mixture of 40 parts of the above-mentioned terminal OH group-containing prepolymer and 15 parts of the above polyester ether polyol and 45 parts of polyoxypropylene triol having a molecular weight of 3000 was foamed in the same manner as in Example 1 to give a flexible polyurethane foam [VI
I] got.

Example 8 Polyethylene butylene adipate 2 having a molecular weight of 2000
3,000 parts of TDI-80 was reacted with 348 parts to obtain a terminal NCO group-containing urethane prepolymer, and then 212 parts of diethylene glycol were reacted to obtain a terminal OH group-containing urethane prepolymer.

Further, an aromatic nucleus-containing polyether 5 having a molecular weight of 600 obtained by adding propylene oxide to bisphenol S
42 parts, diethylene glycol 48 parts and isophthalic acid 8
A polyester ether polyol having a molecular weight of 2000 was prepared from 3 parts and 73 parts of adipic acid.

A molecular weight of 3,000 was added to 10 parts of the urethane prepolymer containing the terminal OH group and 15 parts of the polyester ether polyol.
A mixture of 75 parts of the polyoxypropylene triol was foamed in the same manner as in Example 1 to obtain a flexible polyurethane foam [VIII].

Comparative Example 1 97 g of polyoxypropylene triol having an average molecular weight of 3000 obtained by adding propylene oxide to glycerin as a polyol, and 3 g of propoxylated phosphoric acid having a hydroxyl value of 330 obtained by adding propylene oxide to 100% phosphoric acid. Flexible polyurethane foam [IX] was obtained by foaming in the same manner as in Example 1 except that the mixture was used.

Comparative Example 2 Commercially available 85% phosphoric acid was added on a urethane foam foamed in the same manner as in Example 1 except that polyoxypropylene triol having an average molecular weight of 3000 obtained by adding propylene oxide to glycerin was used as the polyol.
A flexible polyurethane foam [X] coated at a ratio of g / 1 m ² was obtained.

Comparative Example 3 2250 parts of polyoxypropylene glycol having an average molecular weight of 1500 obtained by adding propylene oxide to propylene glycol as a polyol, and phthalic anhydride 500.
Parts, triethylamine 2.5 parts, propylene oxide 2
50 parts were charged into a pressure resistant reactor and reacted at 80 to 120 ° C. After completion of the reaction, 50 parts of a polyester ether polyol having a hydroxyl value of 55 and an acid value of 0.20 excluding unreacted propylene oxide and low boiling point compounds under reduced pressure, and an average molecular weight of 30 obtained by adding propylene oxide to glycerin
Flexible polyurethane foam [XI] was obtained in the same manner as in Example 1 except that 48 parts of polyoxypropylene triol of 00 and 2 g of propoxylated phosphoric acid used in Comparative Example 1 were mixed and used.

[Heat fusion method]

The flexible polyurethane foams [I] to [XI] obtained above are sliced to a thickness of 15 mm and cut into a size of 150 mm long and 50 mm wide. The entire surface of each of these sample foams was melted by a gas burner adjusted to a constant flame and immediately fused on a predetermined fabric under a constant pressure. After leaving for 24 hours
A 120 mm × 25 mm test piece was taken and the peel strength was measured according to JIS L-1066-1963. The results are shown in Table 1.

[Test method for scorch resistance]

Polyol 3500 used in Examples 1 to 8 and Comparative Examples 1 and 3
, 3.5 parts of triethylenediamine dissolved in 175 parts of water, silicone L-54070 parts, and 7 parts of stanna octoate were added, and TDI-80 (NCO index 12
0) was added, and the mixture was vigorously stirred and poured into a mold having a size of 70 cm × 70 cm and a height of 50 cm to prepare a flexible polyurethane foam. Next day, the central part was sliced into a thickness of 7 cm and the yellowness was measured with a color meter.

Color meter: "Color meter Σ80" manufactured by Nippon Denshoku Industries Co., Ltd. The measurement results are shown in Table 1.

From Table 1, it was confirmed that the foam of the present invention was superior to the conventional one in heat fusion resistance and scorch resistance.

<Stability Test Method for Undiluted Solution> 30 g of the raw material polyols of Examples 1 to 8 and Comparative Examples 1 and 3 were placed in a 100 cc beaker, 100% relative humidity, and 50 ° C.
The sample was stored for 4 weeks under the conditions of, and the changes in appearance and acid value with time were measured. The results are shown in Table 2.

From Table 2, it was confirmed that the stock solution of the present invention showed superior stability to the conventional one.

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Claims (1)

[Claims] 1. A flexible polyurethane foam composition comprising a polyhydroxy compound, a polyisocyanate, a foaming agent, a foam stabilizer and a catalyst, wherein (A) a low molecular weight polyhydroxy compound having a molecular weight of 60 to 300 and a functional group number of 2 to 4. (B) a polyoxyalkylene polyol having a molecular weight of 300 to 5,000, (C) an aromatic nucleus-containing diol obtained by adding an alkylene oxide to an aromatic dihydroxy compound having a molecular weight of 230 to 5,000, (D) <alcohol component > Polyoxyalkylene glycol having a molecular weight of 300 to 5,000 alone or in combination with a low molecular weight polyhydroxy compound (A), <acid component> aliphatic dicarboxylic acid, aromatic dicarboxylic acid,
And a polyester ether polyol having a molecular weight of 500 to 6,000 obtained by using at least one of their anhydrides and various derivatives, (E) <alcohol component> by adding an alkylene oxide to an aromatic dihydroxy compound. The obtained molecular weight is 2
30-5,000 aromatic nucleus-containing diol alone or in combination with a low molecular weight polyhydroxy compound (A), and <acid component> an aliphatic dicarboxylic acid and / or aromatic dicarboxylic acid having 3 to 6 carbon atoms Polyester ether polyol having a molecular weight of 500 to 6,000 obtained by using at least one of the above anhydrides and various derivatives, (F) <Alcohol component> Obtained by adding alkylene oxide to an aromatic dihydroxy compound. Molecular weight is 2
30-5,000 aromatic nucleus-containing diol alone or a combination of low molecular weight polyhydroxy compound (A), <acid component> aromatic dicarboxylic acid and long-chain aliphatic dicarboxylic acid having 7-14 carbon atoms, or Polyester ether polyol having a molecular weight of 500 to 6,000, which is obtained from a mixture of the anhydrides and various derivatives, (G) polyoxytetramethylene glycol having a molecular weight of 500 to 5,000, (H) low molecular weight polyhydroxy compound And an aliphatic dicarboxylic acid, an aromatic dicarboxylic acid and their anhydrides, and at least one of various derivatives, an acid alcohol condensed polyester polyol and / or a polycaprolactone polyester polyol obtained by polymerizing ε-caprolactone. , As a polyhydroxy compound And a terminal OH group-containing urethane prepolymer obtained by the reaction of at least one polyol of the above components (A) to (H) with a polyisocyanate, and (D), (E) and (F) A composition for flexible polyurethane foams, characterized in that it is used in combination with at least one of polyester ether polyols.