KR20200078090A - Highly elastic polyurethane foam composition - Google Patents

Abstract

The present invention relates to a highly elastic polyurethane foam composition which, more particularly, consists of a biopolyol, toluene diisocyanate, a blowing agent and a catalyst. The polyurethane foam composition composed of components described herein uses biopolyol, thereby being eco-friendly and exhibiting excellent elastic recovery properties.

Description

High elastic polyurethane foam composition {HIGHLY ELASTIC POLYURETHANE FOAM COMPOSITION}

The present invention relates to a high-elasticity polyurethane foam composition, and more particularly, to a high-elasticity polyurethane foam composition that is eco-friendly and exhibits excellent elastic recovery properties using bio-polyol.

Polyurethane is also referred to as polycarbamate, and is a generic term for polymer compounds containing urethane groups that overlap in the main chain, and organic diisocyanate or polyisocyanate is a dihydroxy group or polyhydroxy group compound. And obtained by addition polymerization.

The polyurethane is manufactured in the form of a foam using a foaming agent and the like, and can be applied to various fields. Among the polyurethane foams, a highly resilient foam is called a highly resilient foam (HR foam).

Highly elastic polyurethane foams are widely used to manufacture mattresses, fabric materials, or automobile seats, and the high elasticity properties of polyurethanes can be described as an elastic recovery property, which is a material "recovery." "And/or "snap back" and/or "rebound" properties.

Determination of a polymer's recovery properties, and/or whether or not a particular polymer has “fast recovery” and/or “good snap back” properties, is obtained after the article made of the polymer is deformed. It may be based on how long it takes to return to shape. For example, it is based on how long it takes for a shoe sole made of a contemplated polymer to bend and/or bend under the application of force, to return to its original form immediately after the force is released. For many applications, including shoe sole applications, the faster the recovery, the better, that is, the faster the article returns to its original shape, the better. Accordingly, materials with fast recovery properties are more suitable for this application.

Rebound resilience is also an indication of hysteretic energy loss that can be defined by the relationship between storage modulus and loss modulus. The measured rebound percentage is inversely proportional to the history loss. Percent elastic or rebound resilience is commonly used in quality control testing of polymers and compounding chemicals. Rebound resilience can be determined by free-falling a weight hammer and/or ball that strikes a test specimen and falls from a given height providing a specific amount of energy to it. Some of that energy is returned to the weight by the specimen and can be measured by the size of the additional repulsion, whereby the restoring force is determined by gravity.

Korean Patent Publication No. 10-2011-0122122 (2011.11.09) Korean Patent Publication No. 10-2018-0084845 (2018.07.25)

An object of the present invention is to provide a highly elastic polyurethane foam composition that is eco-friendly by using bio-polyol and exhibits excellent elastic recovery.

The object of the present invention is achieved by providing a highly elastic polyurethane foam composition characterized in that it consists of bio polyol, toluene diisocyanate, blowing agent and catalyst.

According to a preferred feature of the present invention, the high elastic polyurethane foam composition is composed of 100 parts by weight of bio-polyol, 20 to 25 parts by weight of toluene diisocyanate, 1 to 1.5 parts by weight of blowing agent and 2 to 3 parts by weight of catalyst.

According to a more preferred feature of the invention, the blowing agent is made of one or more selected from the group consisting of water, carbon dioxide, isobutane, cyclopentane, n-pentane, isopentane, dichloromethane and freon.

According to a more preferred feature of the present invention, the catalyst is a group consisting of potassium acetate, potassium isooctanoate, potassium oleate, an azureoctanoate and dibutyltin dilaurate, bis(2-dimethylaminoethyl) ether and silicone. It is assumed that it consists of one or more selected from.

According to a still more preferred feature of the present invention, the catalyst is composed of 100 parts by weight of an azosuccinate, 80 to 120 parts by weight of bis(2-dimethylaminoethyl) ether and 150 to 250 parts by weight of silicone.

The high-elasticity polyurethane foam composition according to the present invention is eco-friendly because bio-polyol is used, and exhibits an excellent effect of providing a polyurethane foam exhibiting excellent elastic recovery.

1 is a photograph showing a highly elastic polyurethane foam composition prepared through Example 1 of the present invention.

Hereinafter, the preferred embodiment of the present invention and the physical properties of each component will be described in detail, but it is intended to be described in detail so that a person skilled in the art to which the present invention pertains can easily implement the invention. This does not mean that the technical spirit and scope of the present invention is limited.

The high elastic polyurethane foam composition according to the present invention is composed of bio polyol, toluene diisocyanate, blowing agent and catalyst, 100 parts by weight of bio polyol, 20 to 25 parts by weight of toluene diisocyanate, 1 to 1.5 parts by weight of blowing agent and catalyst 2 to 3 It is preferably made of parts by weight.

The bio-polyol is a raw material made of polyurethane by reacting with the toluene diisocyanate, and is produced using natural oil. Natural oil is a concept including animal and vegetable oils, preferably vegetable oil. .

Examples of animal oils may include fish oil, cow oil, pork oil, sheep oil, and the like, and mixtures thereof. Meanwhile, examples of vegetable oils include sunflower seed oil, canola oil, palm oil, corn oil, cottonseed oil, rapeseed oil, linseed oil, safflower seed oil, oat oil, olive oil, palm oil, peanut oil, rapeseed oil, rice bran oil, flaxseed oil, sesame oil , Soybean oil, castor oil, and the like, more typically, may mean soybean oil, castor oil, palm oil, and the like, and mixtures thereof. However, the natural oil used in the present invention is not limited to the types listed above.

For example, in the case of castor oil, it is oil obtained by squeezing a seed of castor bean (Rucinus communis). This oil contains about 45% of the seeds and has a higher oil content percentage than other seeds. The fats and oils have a triester (triglyceride) structure of fatty acids and glycerin as a whole. Castor oil is similarly characterized in that about 90% of the glycerin's triester or fatty acid is composed of ricinoleic acid. The rest contains oleic acid and linoleic acid.

The method for synthesizing the above natural oil into bio-polyol can use the method described in Korean Patent Laid-Open Publication No. 10-2012-0038038, "Method for producing bio-polyol using natural oil and polyurethane produced therefrom" Can.

The toluene diisocyanate contains 20 to 25 parts by weight, and is reacted with the bio-polyol to be synthesized as polyurethane, and serves to provide a soft polyurethane foam.

If the content of the toluene diisocyanate is less than 20 parts by weight, the efficiency of the synthetic process of polyurethane decreases, the degree of softening of the polyurethane foam is insignificant, and when the content of the toluene diisocyanate exceeds 25 parts by weight, compared to biopolyol It is not preferable to use an excessive amount.

The blowing agent contains 1 to 1.5 parts by weight, and serves to provide a polyurethane foam by allowing foaming to proceed in the process of polyurethane synthesis through the reaction of the biopolyol and the toluene diisocyanate.

At this time, the blowing agent is made of one or more selected from the group consisting of water, carbon dioxide, isobutane, cyclopentane, n-pentane, isopentane, dichloromethane and freon, preferably made of water having the best eco-friendly properties.

When the content of the foaming agent is less than 1 part by weight, the foaming effect as described above is insignificant, and when the content of the foaming agent exceeds 1.5 parts by weight, foaming of the polyurethane proceeds excessively, thereby deteriorating physical properties of the polyurethane foam produced. .

The catalyst contains 2 to 3 parts by weight, and is in the group consisting of potassium acetate, potassium isooctanoate, potassium oleate, adjuvant octoate and dibutyltin dilaurate, bis(2-dimethylaminoethyl) ether and silicone. It consists of one or more selected.

In particular, in the present invention, the catalyst is preferably composed of 100 parts by weight of an azosuccinate, 80 to 120 parts by weight of bis(2-dimethylaminoethyl) ether, and 150 to 250 parts by weight of silicone, and the catalyst comprising the above components is polyurethane In the process of synthesizing, it is thermally stable, improves consumer preference by producing foams free of volatile amines and/or amines, and balances the foaming reaction (reaction of water and isocyanate) with the gelation reaction (reaction of polyol and isocyanate). By regulating, it serves to provide a polyurethane foam with good quality and acceptable physical properties.

When the content of the catalyst is less than 0.5 part by weight, the above effect is negligible. When the content of the catalyst exceeds 1 part by weight, the effect of the above synthesis is not significantly improved, and the synthetic reaction rate of polyurethane is excessively increased, which is undesirable. .

The high-elasticity polyurethane foam composition composed of the above components transfers bio-polyol, toluene diisocyanate, blowing agent, and catalyst to a high-pressure mixing head rotating at 500 to 6,000 rpm through a metering pump, which is a typical injection pressure of 0.5 to 1.0 kgf/ Foamed with polyurethane with a pore size of 25 to 60 ppi in cm ² , discharged to the upper part of the conveyor moving at a constant speed, cut into short blocks or long blocks, and then cured and It is manufactured through the process of aging.

Hereinafter, a method for manufacturing a high-elasticity polyurethane foam composition according to the present invention and properties of the polyurethane foam produced through the manufacturing method will be described with reference to examples.

<Example 1>

100 parts by weight of bio polyol (derived from castor oil), 20 parts by weight of toluene diisocyanate, 1.25 parts by weight of blowing agent (water) and catalyst (100 parts by weight of tin autoate, 100 parts by weight of bis(2-dimethylaminoethyl) ether and silicone 200 parts by weight) The mixture consisting of 2 parts by weight is transferred to a high-pressure mixing head rotating at 3,000 rpm through a metering pump, and foamed at an injection pressure of 0.7 to 1.0 kgf/cm ² , and the foamed polyurethane foam is discharged to the upper part of the conveyor. And then cured and aged after cutting to a single size to prepare a highly elastic polyurethane foam composition.

<Example 2>

The same procedure as in Example 1 was carried out, but 100 parts by weight of bio polyol, 21.25 parts by weight of toluene diisocyanate, 1.25 parts by weight of blowing agent and 2.5 parts by weight of catalyst were mixed to prepare a high elastic polyurethane foam composition.

<Example 3>

The same procedure as in Example 1 was carried out, but 100 parts by weight of bio polyol, 25 parts by weight of toluene diisocyanate, 1.25 parts by weight of blowing agent, and 3 parts by weight of catalyst were mixed to prepare a high elastic polyurethane foam composition.

The high elastic polyurethane foam composition prepared through Example 1 was photographed and is shown in FIG. 1 below.

As shown in Figure 1 below, it can be seen that the high elastic polyurethane foam composition prepared through Example 1 of the present invention exhibits excellent appearance quality.

In addition, the density and elastic modulus of the highly elastic polyurethane foam compositions prepared through Examples 1 to 3 were measured and are shown in Table 1 below.

{However, the density was measured using a density meter, and the modulus of elasticity (MODULUS) was measured using a TA equipment (Texture analyzer XT plus, SMS).}

<Table 1>

As shown in Table 1, it can be seen that the elastic modulus of the high elasticity polyurethane foam compositions prepared through Examples 1 to 3 of the present invention is excellent.

Therefore, the high elastic polyurethane foam composition according to the present invention is eco-friendly because bio-polyol is used, and exhibits excellent elastic recovery.

Claims (5)

Highly elastic polyurethane foam composition comprising bio-polyol, toluene diisocyanate, blowing agent and catalyst.
The method according to claim 1,
The high-elasticity polyurethane foam composition is a high-elasticity polyurethane foam composition comprising 100 parts by weight of bio-polyol, 20 to 25 parts by weight of toluene diisocyanate, 1 to 1.5 parts by weight of a blowing agent, and 2 to 3 parts by weight of a catalyst.
The method according to claim 1 or 2,
The blowing agent is water, carbon dioxide, isobutane, cyclopentane, n-pentane, isopentane, dichloromethane and a high elasticity polyurethane foam composition, characterized in that consisting of one or more selected from the group consisting of freon.
The method according to claim 1 or 2,
The catalyst is characterized in that it consists of at least one selected from the group consisting of potassium acetate, potassium isooctanoate, potassium oleate, an adjuvant and dibutyltin dilaurate, bis(2-dimethylaminoethyl) ether and silicone. Highly elastic polyurethane foam composition.
The method according to claim 4,
The catalyst is a highly elastic polyurethane foam composition, characterized in that consisting of 100 parts by weight of an azosuccinate, 80 to 120 parts by weight of bis(2-dimethylaminoethyl) ether and 150 to 250 parts by weight of silicone.

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