JPH0859783A - Semi-rigid urethane foam, its production and integral molding method - Google Patents

Abstract

PURPOSE: To obtain the semi-rigid polyurethane foam short in a demolding time, excellent in productivity, fogging resistance and resistance against the deterioration of the surfaces of polyvinyl chloride, and useful for automotive interiors, etc., by reacting a specific resin component with an isocyanate component. CONSTITUTION: This semi-rigid polyurethane foam is obtained by reacting a resin component with an isocyanate component such as polymethylenepolyphenylenepolyisocyanate. The resin component comprises a polyol containing 5-80 pts.wt. (based on 100 pts.wt. of the whole amount of polyols) of an amine-based polyetherpolyol using a compound of the formula (R1 -R3 are 1-3C lower alkyl, alkenyl; n is 0-3) as an amine base material and having a mol.wt. of 1500-12000, 1-30 pts.wt. of a polyetheramine having the primary or secondary amino group at the molecular end and having a mol.wt. of 1500-12000, water and other auxiliaries.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a semi-rigid polyurethane foam used for automobile interior materials such as instrumental panels, door trim upper parts, armrests and headrests.

[0002]

2. Description of the Related Art As a method of manufacturing an automobile interior material as described above, a soft polyvinyl chloride skin is mounted on a lower mold, and a core material such as ASG resin or ABS resin is mounted on an upper mold so that the outer skin is semi-hard. A three-layer structure integral molding method in which a polyurethane foam stock solution is injected to foam and cure is used.

When the above interior materials are mounted in a vehicle and used for a long time, the temperature inside the vehicle may be 120 ° C to 130 ° C depending on the area.
As a result, low-boiling amine catalysts, flame retardants, stabilizers, etc., contained in urethane foam pass through the PVC skin, migrate to the inside of the car, and adhere to glass etc., causing fog (fogging), which has recently become a problem. . In addition, the amine catalyst promotes dehydrochlorination of the soft polyvinyl chloride skin to cause discoloration, and at the same time, the plasticizer in the skin migrates into the urethane foam, so the skin itself changes from a soft system to a hard system, and a deterioration phenomenon. It is said to cause

In order to improve these fogging, discoloration of the skin, and deterioration phenomena, it has been considered to change the amine catalyst contained in the urethane foam from a non-reactive type to a reactive type or to reduce the amount of the catalyst. However, the reaction type catalyst has a drawback that the curing reaction is slow and the productivity is lowered when the amount of the catalyst is reduced. Thus, there is a limit in maintaining productivity and improving fogging, discoloration of the epidermis, and deterioration.

[0005]

The problem to be solved by the present invention is to reduce the amine catalyst in the urethane foam to improve the fogging, the discoloration of the skin and the deterioration phenomenon.
Moreover, it is an object of the present invention to provide a method for producing a semi-rigid urethane foam that maintains productivity.

[0006]

The inventors of the present invention have reached the present invention as a result of intensive studies for the purpose of solving the above problems. That is, the present invention is a semi-rigid urethane foam obtained by reacting a resin component containing an amine-based polyether polyol, a polyether polyamine, a resin component containing water and other auxiliaries with an isocyanate component, wherein the amine-based polyether polyol has a molecular weight. 1500-1
2000, the amount used is 5 to 80 parts by weight based on 100 parts by weight of the total amount of polyol, and the polyether polyamine has a primary and / or secondary amine at a terminal,
The present invention relates to a semi-rigid urethane foam characterized by having a molecular weight of 1500 to 12000 and using the amount of 1 to 30 parts by weight based on 100 parts by weight of the total amount of polyol, and a method for producing the same.

Further, the present invention has a molecular weight of 1500 to 120.
The amine base material of the amine-based polyether polyol of No. 00 is a compound represented by the following general formula (A).

[Chemical 3] (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. )

Furthermore, the present invention is a method of molding a semi-rigid urethane foam, characterized in that the skin mounted on the mold and the semi-rigid urethane foam obtained by casting and foaming the same are integrally molded.

In the present invention, the molecular weight is 1500 to 120.
Examples of the amine base material used for the amine-based polyether polyol of No. 00 include ammonia, monoalkylamine, mono-, di-, trialkanolamine,
Examples thereof include alkylenediamines such as ethylenediamine, propylenediamine, tetramethylenediamine, and hexamethylenediamine. As the amine base material, for example, cyclic amines such as pyridine, aniline, piperazine can be used. As the amine base material, aromatic diamines such as tolylenediamine and diaminodiphenylmethane can also be used. Further, examples of the amine base material include low molecular weight amine-terminated polyether polyols and aminoethylpiperazine.

As a more preferable amine base material, a compound represented by the following general formula (A) having one or more alkyl-substituted amino groups in the molecule and a secondary amine at the terminal of the molecule can be used.

[Chemical 4] (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. )

Examples of the compound represented by the general formula (A) include dimethylethylenediamine, trimethyldiethylenediamine, tetramethyltriethylenetetramine, methylethylethylenetriamine, triethyldiethyltriamine, dimethylisopropyldiethylenetriamine,
Trimethylethyltriethylenetriamine is included, with trimethyldiethylenediamine being most preferred.

The above-mentioned amine compound is used as a base material, and an alkylene oxide typified by propylene oxide, ethylene oxide, butylene oxide, etc. is added alone or in combination to give a molecular weight of 1500 to 120.
00 amine-based polyether polyols can be obtained. For example, the weight ratio of propylene oxide and ethylene oxide added to the amine compound is 100: 0.
It is preferably about 60:40, particularly preferably around 80:20. If the weight ratio of ethylene oxide is 40% or more,
The obtained foam shrinks, which is not preferable.

The method for adding ethylene oxide may be a chipped type in which ethylene oxide is added to the end of the molecular chain or a balanced type in which ethylene oxide is added in the molecular chain.

If the molecular weight of the obtained amine-based polyether polyol is larger than 12000, the viscosity is too high and it is difficult to use. If it is smaller than 1500, the obtained foam shrinks, which is not preferable.

The amount of the amine-based polyether polyol is preferably 5 to 80 parts by weight based on 100 parts by weight of the total polyol. If it is less than 5 parts by weight, the amine catalyst concentration cannot be reduced, and if it is more than 80 parts by weight, the reactivity becomes too fast and the fluidity in the mold becomes insufficient.

As the polyol other than the amine-based polyether polyol, known ones can be used, and particularly preferable ones are water or ethylene glycol,
A polyhydroxy compound such as propylene glycol, diethylene glycol, glycerin, pentaerythritol, sorbitol or sucrose is added with an alkylene oxide represented by propylene oxide, ethylene oxide or butylene oxide alone or in combination to give a molecular weight of 1500. Up to 12000 polyether polyols can be obtained.

Further, a polymer polyol obtained by graft-polymerizing acrylonitrile or styrene in these polyether polyols, or a mixture of polyether polyol and polymer polyol, and one of dibasic acids such as adipic acid and sebacic acid. Or two or more kinds and ethylene glyco-
And one or more polyhydric alcohols such as propylene, propylene glycol, diethylene glycol, triethylene glycol, glycerin and trimethylolpropane,
It also includes a polyester polyol having a hydroxyl group at the terminal obtained by reacting the polyhydric alcohol in a stoichiometric excess, a polycaprolactone polyol obtained by ring-opening polymerization of caprolactone, and the like.

The polyether polyamine used in the present invention is one having an average molecular weight of 1500 to 12000 and containing a primary and / or secondary amino group at the terminal. The polyether polyamine preferably has an average number of functional groups of 2 to 4 and has at least 50 equivalent% or more of primary and / or secondary amino groups at the molecular ends, and more preferably 8
It is a polyether polyamine containing 0 to 100 equivalent%.
Residues other than primary and / or secondary amino groups at the ends of the molecule are preferably primary and / or secondary hydroxyl groups.

This polyether foliamine can be produced by a known method. One of the known methods is the amination reaction of polyhydroxy polyethers (eg polypropylene polyether glycol). For example, U.S. Pat. Nos. 3,654,370 and 3838076 each describe a method for producing a polyether polyamine by reacting a polyol with ammonia and hydrogen at high pressure in the presence of a nickel, chromium, or copper catalyst. .

An example of a preferable polyether polyamine is a polyether triamine (Texaco, trade name Jeffamine) having an average molecular weight of 5000 and an amination ratio of 95% obtained by addition-polymerizing propylene oxide to glycerin and aminating. T-5000). If the molecular weight of the polyether polyamine is more than 12000, the viscosity is too high to be used easily, and if it is less than 1500, the obtained foam shrinks, which is not preferable. The amount of the polyether polyamine used is preferably 1 to 30 parts by weight based on 100 parts by weight of the total amount of the polyol. When the amount of the polyether polyamine used is less than 1 part by weight, the demolding time is shortened and the durability of the skin is not affected, and when it exceeds 30 parts by weight, the reaction is premature and the obtained foam shrinks, which is not preferable.

As the isocyanate which can be used in the present invention, known ones can be used, but particularly preferable ones are polymethylene polyphenylene polyisocyanate (crude MDI) or polymethylene. It is a prepolymer having a terminal isocyanate group obtained by reacting polyphenylene polyisocyanate (Crued MDI) with a polyol. Mixture of MDI and Clude MDI, uretoniminated modified liquid MD with said mixture
A mixture of I can also be preferably used.

The cross-linking agent usable in the present invention includes:
2 to 1 mol of triethanolamine, diethanolamine, and aniline with propylene oxide and ethylene oxide
Examples thereof include a compound obtained by adding 3 moles and a compound obtained by adding 4 to 5 moles of alkylene oxide such as propylene oxide and ethylene oxide to 1 mole of ethylenediamine. The amount used is 1 to 100 parts by weight of the polyol component.
10 parts by weight. A blowing agent other than water can be used in combination.

The water used in the present invention reacts with an aromatic isocyanate to form a polyurea component, and the main purpose is to generate carbon dioxide gas to act as a foaming agent, which is an essential component. . The amount used is 1 to 10 parts by weight with respect to 100 parts by weight of the polyol component. A blowing agent other than water can be used in combination.

The foaming amine catalyst used in the present invention is, for example, a urethanated amine catalyst such as triethylamine, tripropylamine, triisopnopearlamine, tributylamine, trioctylamine, hexadecyldimethylamine, N-methylmorpholine and N-. Ethylmorpholine, N
-Ocdadecylmorpholine, monoethanolamine, diethanolamine, triethanolamine, trimethylaminoethylethanolamine, N-methyldiethanolamine, N, N-dimethylethanolamine, diethylenetriamine, N, N, N ', N'-tetramethylethylenediamine, N, N, N ', N'-tetramethylpropylenediamine, N, N, N', N'-tetramethylbutanediamine, N, N, N ', N'-tetramethyl-
1,3-butanediamine, N, N, N ′, N′-tetramethylhexamethylenediamine, bis- [2- (N, N
-Dimethylamino) ethyl] ether, N, N-dimethylbenzylamine, N, N-dimethylcyclohexylamine, N, N, N ', N'N "-pentamethyldiethylenetriamine, formate salts of triethylenediamine and other salts, Oxylalkylene adducts of amino groups of primary and secondary amines, aza ring compounds such as N, N-dialkylpiperazines, β-aminocarbonyl catalysts of JP-A-52-043517, β-amino acids of JP-A-53-014279. -Aminonitrile catalysts, etc. These catalysts are used alone or as a mixture, and the amount thereof is 100
It is 0.1 to 10 parts by weight with respect to parts by weight.

The foam stabilizers optionally used in the present invention are conventionally known organosilicon activators, such as L-520, L-532 and L-54 manufactured by Nippon Unicar Co., Ltd.
0, L-544, L-550, L-3350, L-53
05, L-3600, L-3601, L-5305, L
-5307, L-5309, L-5710, L-572
0, L-5740M, L-6202, etc., and SH-190, SH-192, SH manufactured by Toray Silicon Co., Ltd.
-194, SH-200, SRX-253, SRX-2
74C, SF-2961, SF-2962, SRX-2
80A, SRX-294A, and the like, manufactured by Shin-Etsu Silicone Co., Ltd. F-114, F-121, F-122, and F-.
220, F-230, F-258, F-260B, F-
317, F-318, F-341, F-601, F-6
06, X-20-200, X-20-201, etc., manufactured by Toshiba Silicone Co., Ltd., TFA-4200,
For example, TFA-4202. The amount of these foam stabilizers used is 0. 0 with respect to 100 parts by weight of the compound having active hydrogen.
It is 1 to 10 parts by weight.

As the flame retardant, for example, tris (2-chloroethyl) phosphate, tris (dichloropropyl) phosphate, tris (dibromopropyl) phosphate, CR-505 and CR-507 manufactured by Daihachi Chemical Co., Ltd., Fyrol manufactured by Akzo Japan. -6 or the like is used. In addition, a plasticizer, a stabilizer, a coloring agent and the like can be added if necessary.

In the present invention, the isocyanate index [NCO / active hydrogen-containing group equivalent ratio × 10] at the time of polyurethane production.
0] (abbreviated as NCO / OH) is 60 to 140, preferably 70 to 120, and particularly preferably 80 to 110.

For the production of polyurethane, commonly used production equipment can be used. Various foams can be produced in closed or open molds. Polyurethane is usually produced by mixing and reacting raw materials using a low-pressure or high-pressure mechanical device.

The production of the present invention is useful in the production of molded foam. It is also possible to use RIM (reaction injection molding). The polyurethane obtained may be either flexible or semi-rigid foam, but semi-rigid foam is preferred. The density of the obtained polyurethane is 0.03 to 0.30 g / cm.
It is preferably in the range of 3. Density is 0.03g / c
When it is less than m3, the moldability is deteriorated, which is not preferable.
If it exceeds 30 g / cm ³ , it is not economically preferable. The semi-rigid urethane foam obtained by the present invention is mainly used for automobile interior parts such as crash pads, armrests and headrests.

The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited to these examples.

The raw materials used in Examples and Comparative Examples are as follows. 1. Polyol component (1) POP31-28 (manufactured by Mitsui Toatsu Kagaku) A polymer polyol obtained by graft-polymerizing acrylonitrile and styrene in a polyether polyol, having a hydroxyl value of 28 mgKOH / g. (2) Polyol-A A polyether polyol having a molecular weight of 6000 and a hydroxyl value of 28 mgKOH / g, which is obtained by adding propylene oxide and ethylene oxide to glycerin at a ratio of 80:20. 2. Amine-based polyether polyol component (3) Polyol-B Polyether polyol having a molecular weight of 4000 and a hydroxyl value of 28 mgKOH / g obtained by adding propylene oxide and ethylene oxide to trimethyldiethylenetriamine at a ratio of 80:20. (4) Polyol-C tri A molecular weight of 600 obtained by adding propylene oxide and ethylene oxide to ethanolamine at a ratio of 80:20.
0, a polyether polyol having a hydroxyl value of 28 mgKOH / g.

3. Polyether polyamine component (5) JT-5000 (Jeffermin T-5000,
(Texaco) Polyethertriamine having a molecular weight of 5000.

4. 4. Catalyst component (6) Catalyst A; triethylamine (7) Catalyst B; triethylenediamine 33% DPG solution 5. Crosslinking agent component (8) Crosslinking agent DEOA; diethanolamine 6. Foaming agent component (9) Water

7. Isocyanate component (10) Isocyanate A; Polymeric MDI (Mitsui Toatsu Chemical Co., Ltd. Cosmonate M-200)

In free foaming, the time when foaming starts (hereinafter cream time), the time when a stick is pierced into the foam and the foam pulls a thread when the stick is pulled up (gel time), and the time until foaming ends (rise time) ) Was measured. Curing (curing) property is pre-adjusted to 40 ° C by injecting the undiluted urethane solution into the mold, and finger marks after finger touch (finger nail)
The demolding time that does not remain was measured. The demolding hardness was measured with an Asker C hardness meter.

The heat deterioration test of the vinyl chloride skin was conducted as follows. A soft polyvinyl chloride skin was attached to the lower mold of the mold previously adjusted to 40 ° C., the urethane stock solution was poured onto it, the upper mold was tightened and left at room temperature for 4 minutes, and then the obtained two-layer integral molding The product was taken out from the mold, and one day later, the two-layer molded product was left in an oven at 110 ° C. for 400 hours, and then the discoloration / fading ΔE of the soft polyvinyl chloride skin was measured by a color difference meter manufactured by Tokyo Denshoku Co., Ltd. Further, the elongation value (EL) of the epidermis was measured to examine the deterioration condition.

The fogging test was conducted as follows.
An integral product of the above-mentioned soft polyvinyl chloride skin and semi-rigid urethane foam was cut into a rectangular parallelepiped sample of 20 × 20 × 10 mm, and the skin-peeled sample was put in a round-mouth glass bottle (100 cc, inlet outer diameter 32 mm) without a lid. It was put in, and a glass petri dish with an outer diameter of 85 mm containing ice water was covered as a lid. The bottom of the neck of a 100 cc glass bottle was held in an oil bath at 110 ° C. for 3 hours. Regarding the amount of fogging, the petri dish with the adhered substance on the outer bottom was left in a desiccator overnight as it was, and the weight of the petri dish was measured the next morning to determine the weight difference from the petri dish before the experiment. The value of the weight difference obtained above with respect to the weight of the original sample was expressed in%.

The resin component and the isocyanate component of Examples 1, 2, 3, and 4 were mixed in parts by weight as shown in Table 1,
Free foaming at 25 ° C and 5
Molding was performed by a rectangular mold of 0 × 200 × 200 mm. In Examples 1, 2, 3, and 4 in which the amine-based polyether and the polyethertriamine were used in combination, the curing property (curing time), fogging, and PVC heat resistance were good. The results are shown in Table 1.

[0039]

[Table 1]

The resin component of Comparative Examples 1, 2, 3, 4, and 5 and the isocyanate component were mixed in the weight parts shown in Table 2, and 25
Free foaming (free blowing) at ℃, 20 ×
Molding was performed with a rectangular mold of 1000 × 300 mm. As shown in Comparative Examples 3 and 4, when the amine-based polyether is used, the amount of the catalyst is small even with the same curing time, and the fogging and the heat deterioration of PVC are excellent. In the case of Comparative Example 2, the addition of JT-5000 (10 parts) showed a slight effect on the curing property, fogging, and PVC heat resistance deterioration. In the case of Comparative Example 5 to which JT-5000 (40 parts) was added, the obtained foam shrank probably because the reaction was too early. Table 2 shows the results.

[0041]

[Table 2]

[0042]

According to the present invention, a semi-rigid foam excellent in productivity, fogging resistance and PVC skin deterioration resistance can be obtained.

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[Procedure amendment]

[Submission date] November 16, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 4

[Correction method] Change

[Correction content]

Embedded image (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. ) ─────────── ───────────────────────────────────────────

[Procedure amendment]

[Submission date] September 25, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

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[Claims]

Embedded image (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. )

Embedded image (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. )

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

The problem to be solved by the present invention is to reduce the amine catalyst in the urethane foam to improve the fogging, the discoloration of the skin and the deterioration phenomenon.
Moreover, semi-rigid urethane foam and
And its manufacturing method.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

Further, the present invention has a molecular weight of 1500 to 120.
The present invention relates to the semi-rigid urethane foam and the method for producing the same, wherein the amine-based polyether polyol of No. 00 is a compound represented by the following general formula (A) as an amine base material.

[Chemical 3] (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. )

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction content]

The compound represented by the general formula (A) includes N, N'-dimethylethylenediamine, N, N ',
N ″ -trimethyldiethylenetriamine, N, N ′,
N ″, N ″ ′-tetramethyltriethylenetetramine,
N-methyl-N'-ethylethylenediamine, N, N ',
N ″ -triethyldiethylenetriamine, N, N′-dimethyl-N ″ -isopropyldiethylenetriamine,
N, N ′, N ″ -trimethyl-N ′ ″-ethyltriethylenetetramine is included, with N, N ′, N ″ -trimethyldiethylenetriamine being most preferred.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Name of item to be corrected] 0024

[Correction method] Change

[Correction content]

The foaming amine catalyst used in the present invention is, for example, a urethane amine catalyst such as triethylamine, tripropylamine, triisopropylamine, tributylamine, trioctylamine, hexadecyldimethylamine, N-methylmorpholine, N-ethylmorpholine. , N
-Ocdadecylmorpholine, monoethanolamine, diethanolamine, triethanolamine, trimethylaminoethylethanolamine, N-methyldiethanolamine, N, N-dimethylethanolamine, diethylenetriamine, N, N, N ', N'-tetramethylethylenediamine, N, N, N ', N'-tetramethylpropylenediamine, N, N, N', N'-tetramethylbutanediamine, N, N, N ', N'-tetramethyl-
1,3-butanediamine, N, N, N ′, N′-tetramethylhexamethylenediamine, bis- [2- (N, N
-Dimethylamino) ethyl] ether, N, N-dimethylbenzylamine, N, N-dimethylcyclohexylamine, N, N, N ', N'N "-pentamethyldiethylenetriamine, formate salts of triethylenediamine and other salts, Oxylalkylene adducts of amino groups of primary and secondary amines, aza ring compounds such as N, N-dialkylpiperazines, β-aminocarbonyl catalysts of JP-A-52-043517, β-amino acids of JP-A-53-014279. -Aminonitrile catalysts, etc. These catalysts are used alone or in a mixture, and the amount of the catalyst used is the compound 100 having active hydrogen.
It is 0.1 to 10 parts by weight with respect to parts by weight.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0029

[Correction method] Change

[Correction content]

The production of the present invention is useful in the production of molded foam. It is also possible to use RIM (reaction injection molding). The polyurethane obtained may be either flexible or semi-rigid foam, but semi-rigid foam is preferred. The density of the obtained polyurethane is 0.03 to 0.30 g / cm.
It is preferably in the range of ³ . Density is 0.03g / c
If it is less than m ³ , the moldability is deteriorated, which is not preferable, and
If it exceeds 30 g / cm ³ , it is not economically preferable. The semi-rigid urethane foam of the present invention has a skin attached to a mold,
Polyurethane containing amine-based polyether polyol according to the present invention, polyether polyamine, urethane component solution containing resin component and isocyanate component containing water and other auxiliaries is injected and reacted to be integrated with the epidermis. It can be suitably used for a molding method. By this method, it is possible to obtain an integrally molded product which has high productivity and is excellent in various applications, particularly as an automobile interior part. The semi-rigid urethane foam obtained by the present invention is mainly used for automobile interior parts such as crash pads, armrests and headrests.

 ─────────────────────────────────────────────────── --- Continuation of the front page (72) Inventor Kunio Sasaoka 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd. (72) Masami Sakai 1190 Kasama-cho, Sakae-ku, Yokohama, Kanagawa Mitsui Toatsu (72) Inventor Hiroshi Ueda 1190 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa Mitsui Toatsu Chemical Co., Ltd.

Claims (5)

[Claims] 1. A semi-rigid urethane foam obtained by reacting a resin component containing an amine-based polyether polyol, a polyether polyamine, water and other auxiliaries with an isocyanate component, wherein the amine-based polyether polyol has a molecular weight of 1500. ~ 1200
0 of which the total amount of polyol used is 100
It is 5 to 80 parts by weight in the weight part, the polyether polyamine has a primary and / or secondary amine at the terminal, and has a molecular weight of 1500 to 12000, and the amount thereof is based on 100 parts by weight of the total amount of the polyol. A semi-rigid urethane foam characterized by being 1 to 30 parts by weight. 2. The semi-rigid urethane foam according to claim 1, wherein the amine base material of the amine-based polyether polyol having a molecular weight of 1500 to 12000 is a compound represented by the following general formula (A). Embedded image (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. ) 3. A semi-rigid urethane foam obtained by reacting a resin component containing a polyol containing an amine-based polyether polyol, a polyether polyamine, water and other auxiliaries with an isocyanate component, wherein the amine-based polyether polyol has a molecular weight of 1500. ~ 1200
0 of which the total amount of polyol used is 100
It is 5 to 80 parts by weight in the weight part, the polyether polyamine has a primary and / or secondary amine at the terminal, and has a molecular weight of 1500 to 12000, and the amount thereof is based on 100 parts by weight of the total amount of the polyol. A method for producing a semi-rigid urethane foam, which is 1 to 30 parts by weight. 4. The method for producing a semi-rigid urethane foam according to claim 1, wherein the amine base material of the amine-based polyether polyol having a molecular weight of 1500 to 12000 is a compound represented by the following general formula (A). . Embedded image (In the formula, R ₁ , R ₂ , and R ₃ represent a lower alkyl group or an alkenyl group having 1 to ₃ carbon atoms, and n represents 0 or an integer of 1 to _3. ) 5. A method of molding a semi-rigid urethane foam, characterized in that the skin mounted on the mold and the semi-rigid urethane foam according to claim 1 obtained by casting and foaming are integrally molded.