KR100511015B1 - stink repressible composition for polyurethane foam manufacturing - Google Patents

Abstract

The present invention relates to a polyurethane foam composition comprising a polyisocyanate and a polyol, a reactive amine catalyst, a crosslinking agent, and a foam stabilizer, wherein the activated carbon having a particle size of 0.01 to 1.0 mm is present in the polyisocyanate or resin premix. It relates to a composition for producing a polyurethane foam suppressed off-odor generated by adding and mixing 5.0% by weight. Polyurethane foam obtained by foam molding the composition of the present invention has an effect that can reduce the occurrence of odor by more than about 10 times compared to the conventional polyurethane foam.

Description

Polyurethane foam manufacturing composition which suppressed off-flavor occurrence {stink repressible composition for polyurethane foam manufacturing}

The present invention relates to a composition for producing a polyurethane foam (induced odor) suppressed.

Polyurethane foam (urethane foam) is light in weight, has a long life and has a soft elasticity characteristics, it is widely used as interior materials for automobiles and houses as well as insulation, soundproofing and the like.

In particular, the demand for high-elasticity urethane foam is gradually increasing as the quality demand level of consumers for automobile and household goods materials is gradually advanced.

Polyurethane foam is light, tough and has the advantage of maintaining a high elasticity over a long period of time, while people generally do not like, and has the disadvantage of generating an odor, that is, off-set (odor).

The reason for producing such odor is that polyurethane foam not only uses various materials such as isocyanate, polyol and reaction catalyst as raw materials, but also generates odor such as urea, burette and carbide in the process involving isocyanurate reaction and urethane reaction. This is presumed to be due to the small amount of byproducts.

In particular, as people's interest in the off-flavor problem in new cars or newly built policies increases, the urethane foam producers are interested in producing urethane foam that does not cause off-flavor, and are commercially available in the manufacturing process.消臭 劑) is also used, but the production costs are only high, but the situation is not getting satisfactory deodorant.

Therefore, research into the polyurethane foam that suppresses the occurrence of off-flavor in the field is actively progressing.

An object of the present invention is to provide a composition for producing polyurethane foam, which suppresses the occurrence of off-flavor. The present inventors add 0.3-5.0% by weight of activated carbon having a particle size of 0.01-1.0 mm based on the resin premix in the composition of polyurethane foam manufacturing composition and greatly reduce the odor generated in the polyurethane foam. It was confirmed that the present invention was completed.

The present invention relates to a polyurethane foam composition prepared by adding a small amount of powdered activated carbon and a reactive catalyst and to a polyurethane foam which suppresses off-flavor caused by foaming and molding the composition.

Activated carbon, which consists of porous carbon materials with micropores inside, is called activated carbon. Activated carbon is mainly made of wood, but is also produced by activating lignite or peat. Activated charcoal produced from wood is representative of charcoal (charcoal made of oak).

It is well known that charcoal has antimicrobial and bactericidal effects, and the specific surface area is very large because the interior is porous. Therefore, the adsorption performance is also very good.

 The resin premix used in the present invention is a polyol having a molecular weight of 1,000-10,000, a molecular weight formed of a polyether or polyester polyol having a terminal hydroxyl group of 2-4 or an acrylonitrile or styrene monomer of 1,000-10,000 and a terminal hydroxyl group of 2 A polyether polyol of -4 and a polyol mixed with two or more kinds of polyols made of ethylene glycol, glycerin, pentaerythritol, sorbitol, and sugar, and have a functional number of 2-5 and hydroxyl number containing active hydrogen as a crosslinking agent. Ethanol amine, which is -2000, uses a physical foaming agent and water as a blowing agent, and includes a foaming agent and an additive.

Examples of the crosslinking agent include ethylene glycol, diethylene glycol, triethylene glycol, thipropylene glycol, 1,4-butanediol, 1,6-hexanediol, pentaerythritol, diethanolamine, triethanolamine, ethylenediamine, triethylenetetraamine, Methyleneolsocroaniline, 4,4-diphenyldiamine, 2.6-dichloro-4, 4-diphenylmetaldiamine, 2,6-toluenediamine, 2,4-toluenediamine, and the like may be used. -10.0 wt%.

Weight percent in the present invention is based on the weight of the resin premix.

As the catalyst used in the present invention, it is possible to use those conventionally used in polyurethane foam, and there is no limitation, for example, triethylene diamine, bisdimethylaminoethyl ether, tripropylamine, triisopropanolamine, Tributylamine, triethylamine, N-methylmorphine, diethylenetriaminebis (2- (n, n-dimethylamino) ethyl) ether and other salts. It is more effective when used alone or in combination with 0.001-10.0% by weight of the combination.

0.1-10.0 wt% of blowing agent and water, 0.1-5.0 wt% of organosilicon foam stabilizer, 0.1-10.0 wt% of charcoal powder, polyisocyanate containing resin premix and 10-60 wt% of isocyanate groups It is made by reacting. In the present invention, it is possible to use various stabilizers, fillers, colorants, flame retardants, antibacterial agents and the like as necessary. Polyurethane foam or the composition prepared according to the present invention can suppress off-flavor occurrence.

Accordingly, the compositional components of the composition of the present invention are compositional components already used in this field except for using activated carbon with a reactive amine catalyst.

Here, the isocyanate index is an index for the equivalent of the compound with the active hydrogen group contained in the resin premix and the stoichiometric amount of the isocyanate reacting with the active hydrogen. These isocyanate indexes are calculated according to the following formula.

Equation 1)

In the resin premix, the equivalent weights of each substance with active hydrogen groups are calculated to obtain the total equivalent weight and the amount of isocyanate needed for the reaction.

Equation 2)

Where OHv is the OH value.

The resin premix and the isocyanate composition are carried out by the operation shown in the examples using the amounts shown in Table 1, and the resin premix and the isocyanate composition are mixed. The mixture is stirred and injected into a 400 × 400 × 100 mm aluminum mold heated at 50 to 70 ° C. with a density of 50 kg / m 3 to close the lid. The foam molded in the mold is evaluated for odor after 15 minutes and 24 hours immediately after being taken out of the mold 5 minutes after the start of stirring the resin premix and the isocyanate composition. This evaluation serves as a measure for evaluating the smell.

The present invention will be described in detail with reference to the following Examples.

      EXAMPLE

Isocyanate is used in which the content of toluene diisocyanate is 20.1-40.0% by weight relative to 100% by weight of the total isocyanate.

Next, as shown in [Table 1], polyol, water, catalyst, crosslinking agent and organosilicon foaming agent, which are components of the resin premix, were mixed in the amount shown in [Table 1] to make the resin premix, and the isocyanate index is 100 Take the mixture, mix and stir, and inject the density 50㎏ / ㎥ into the aluminum mold of 400X400X100mm heated to 50 ~ 70 ℃ to close the lid. The foam formed in the mold was smelled after 30 minutes and 24 hours (60 ° C) immediately after taking out of the mold 5 minutes after the start of stirring the resin premix and the isocyanate composition (model name XP-329, NEW COSMOS ELECTRICS, JAPAN). Product, RANGE: 0-2000). The composition of the foam and the composition of the foam using the reactive catalyst, the foam containing the general deodorant in the reactive catalyst and the foam including the charcoal was evaluated. The odor of the foam containing the char of Example 1 was found to be the least.

As a result of several experiments in the composition of the present invention it was confirmed that the addition amount of char is 0.3 to 5.0% by weight relative to the resin premix weight.

Comparison table of odor of urethane foam according to the change of catalyst and additives (unit: Kg) Comparative example Example  NO. One 2 3 4 One  Resin Premix Prescription  Polyol A # 1) 74.18 73.834 73.834 73.834 73.834  Polyol B # 2) 18.54 18.46 18.46 18.46 18.46  Polyol C # 3) 1.854 1.846 1.846 1.846 1.846 H ₂ O # 4) 3.34 3.323 3.323 3.323 3.323  Foam stabilizer # 5) 0.742 0.738 0.738 0.738 0.738  Amine catalyst # 6) 0.556 0.554  Amine catalyst # 7) 0.554 0.554 0.554  Amine Reactive Catalyst # 8) 0.046 0.046 0.046 0.046 0.046  Crosslinker # 9) 0.742 0.738 0.738 0.738 0.738  Deodorant # 10 0.461 0.461  Charcoal # 11) 0.461  Isocyanate 50.2 50.4 50.2 50.4 50.4  Isocyanate Index 100 100 100 100 100  Odor 15 minutes after foam manufacture 1157 891 698 519 472  Odor (60 ° C) after 24 hours of foam manufacture 143 83 64 51 10

Polyol A) Polyether polyol obtained by addition polymerization of propylene oxide and ethylene oxide with glycerin as an initiator, OHV 28 mg KOH / g

Polyol B) Polymer polyol prepared by dispersing acrylonitrile and styrene monomer in a polyether polyol obtained by addition polymerization of propylene oxide and ethylene oxide as an initiator, OHV 28 mg KOH / g

Polyol C) Polyether polyol obtained by addition polymerization of propylene oxide and ethylene oxide with glycerin as an initiator, OHV 56 mg KOH / g

# 4) distilled or ion-exchanged water

# 5) Foam stabilizer, Japan Toray Corporation, trade name SRX-274C

# 6) Amine catalyst, product of Air Products, DABCO 33LV

# 7) Amine catalyst, tososa product, trade name KAO No25

# 8) amine reactive catalyst, product of Gao Corporation, trade name NIAX A-1

# 9) Crosslinking agent diethanol amine, product of Korean polyol company, brand name DEOA

# 10) Deodorant. Zika, Japan brand name ZIKA-FS

# 11) Charcoal, Life Charcoal

In the above [Table 1], the numerical value indicating the odor means that the higher the odor occurrence. The use of the amine reactive catalyst and the charcoal showed a 2-14 times odor suppression effect than the charcoal alone.

Polyurethane foam prepared by the composition of the present invention has the effect of reducing the occurrence of off-flavor of about 10 times or more than the conventional polyurethane foam.

Claims (2)

In the polyurethane foam production composition composed of a resin premix containing polyisocyanate and polyol, a reactive amine catalyst, a crosslinking agent, and a foam stabilizer, activated carbon having a particle size of 0.01 to 1.0 mm in the polyisocyanate or resin premix is added to the resin premix weight. Polyurethane foam manufacturing composition which suppressed off-flavor occurrence formed by adding and mixing 0.3 to 5.0% by weight. Polyurethane foam obtained by foam-molding the composition of Claim 1.