KR20220148990A - Polyurethane memory foam composition and polyurethane memory foam manufactured using the same - Google Patents

Abstract

The present embodiments relate to a polyurethane memory foam composition and a polyurethane memory foam manufactured using the same, and according to the present embodiments, it is possible to provide the polyurethane memory foam composition with improved temperature reactivity and air permeability as the viscoelastic properties do not sensitively change with temperature in a high-temperature environment, and air circulation is possible, and to provide memory foam manufactured using the same.

Description

Polyurethane memory foam composition and polyurethane memory foam manufactured using the same

The present embodiments relate to a polyurethane memory foam composition and a polyurethane memory foam manufactured using the same.

Polyurethane memory foam is a visco-elastic material having an open cell structure, and has pressure relief properties. That is, the polyurethane memory foam is gradually and gently shaped along the entire contour of the object in response to the pressure applied by the object, and thus supports the object while absorbing all the applied pressure. In addition, polyurethane memory foam gradually returns to its original shape when the pressure is removed.

Polyurethane memory foam is being used for various purposes in the industrial and living environment fields. For example, polyurethane memory foam can be used in bedding. Bedding made of polyurethane memory foam absorbs or distributes the load of the human body and gently wraps the entire body. Polyurethane memory foam bedding is shaped according to the overall contour of the body, allowing users to feel comfortable and to have a comfortable sleep.

Polyurethane memory foam has memory performance due to its viscoelastic properties at temperatures above room temperature, so when a user lies on a pillow or bed made of polyurethane memory foam, the head and body shape are slowly deformed to lower body pressure. Due to these viscoelastic properties, the bedding made of polyurethane memory foam has a delayed recovery when the user toss and turns while sleeping, and it takes a certain amount of time to evenly distribute the weight by insensitively responding to changes in posture, such as tossing and turning. do. Accordingly, there is a problem in that the body pressure is not evenly distributed, disturbing the user's sleep and causing back pain.

Therefore, in order to solve this problem, the viscoelastic properties are maintained at a temperature of 25° C. or less, but at a temperature of 30° C. or more, only the elastic properties with the viscosity removed are recovered by sensitively responding to the user's posture change. , there is a demand for the development of polyurethane memory foam that can induce a pleasant sleep by removing the user's sleep disturbance and back pain.

In addition, the conventional polyurethane memory foam has little air permeability, so that the circulation of internal air and external air is not made smoothly, so heat may be accumulated, and thus, the user feels hot and uncomfortable, and also bacteria Because this breeding or mold can occur, the development of polyurethane memory foam with improved ventilation is required.

The present embodiments provide a polyurethane memory foam composition with improved temperature response characteristics and air permeability, and polyurethane memory foam manufactured using the same, by sensitively reacting to a change in the user's posture at high temperature and recovering, and air circulation is possible. can

In one aspect, the present embodiments include a polyisocyanate having two or more isocyanate groups in the molecule, a blowing agent and a polyol mixture, wherein the polyol mixture comprises 10 to 30 parts by weight of a first polyol derived from propylene oxide, ethylene oxide and propylene oxide. It is possible to provide a polyurethane memory foam composition comprising 35 to 75 parts by weight of a second polyol derived from the combination and 15 to 35 parts by weight of a third polyol that is a polyether polymer polyol.

In another aspect, it is possible to provide a polyurethane memory foam manufactured using the polyurethane memory foam composition provided according to an aspect of the present embodiments.

According to the present embodiments, a polyurethane memory foam composition with improved temperature response characteristics and air permeability due to the ability to recover by sensitively reacting to a change in the user's posture at high temperature and air circulation, and polyurethane memory foam manufactured using the same can provide

Therefore, according to the present embodiments, it is possible to efficiently distribute pressure at high temperature and overcome the limitations of the conventional polyurethane memory foam that is too soft, so that the polyurethane memory foam can greatly expand the application range of the polyurethane memory foam. It is possible to provide a foam composition and polyurethane memory foam manufactured using the same.

In addition, according to the present embodiments, the polyurethane memory foam composition and polyurethane memory foam manufactured using the same have high air permeability so that air is circulated when the air is released or introduced due to the pressure caused by the user tossing and turning, so that the polyurethane It is possible to provide a polyurethane memory foam composition that can be used hygienically and cleanly by preventing moisture or odor from occurring inside the memory foam and inhibiting the growth of mold and bacteria, and polyurethane memory foam manufactured using the same. .

Hereinafter, some embodiments of the present disclosure will be described in detail. In addition, in describing the present embodiments, if it is determined that a detailed description of a related known configuration or function may obscure the gist of the present technical idea, the detailed description may be omitted. When "includes", "having", "consisting of", etc. mentioned in this specification are used, other parts may be added unless "only" is used. When a component is expressed in a singular, it may include a case in which the plural is included unless otherwise explicitly stated.

In addition, in describing the components of the present disclosure, terms such as first, second, A, B, (a), (b), etc. may be used. These terms are only for distinguishing the elements from other elements, and the essence, order, order, or number of the elements are not limited by the terms.

Meanwhile, when numerical values for components are mentioned, the numerical values may be interpreted as including an error range that may occur due to various factors (eg, manufacturing factors, etc.), even if there is no separate explicit description.

Hereinafter, the polyurethane memory foam composition provided by the present embodiments will be described in more detail.

The polyurethane memory foam composition according to the present embodiments may include a polyisocyanate having two or more isocyanate groups in a molecule, a foaming agent, and a polyol mixture.

Polyisocyanate is a compound having two or more isocyanate groups in a molecule, and may include all known compounds for the production of polyurethane. For example, the polyisocyanate may include the known divalent or polyvalent isocyanates of aliphatic, cycloaliphatic and aromatic, and may include any combination thereof.

The polyisocyanate may be a diisocyanate. For example, the polyisocyanate may be tolylene diisocyanate (hereinafter referred to as 'TDI') or diphenylmethane diisocyanate (hereinafter referred to as 'MDI'), and a mixture of TDI and MDI. may be

TDI may be a mixture of 2,4-TDI isomers and 2,6-TDI isomers, preferably 80 wt% 2,4-TDI isomers and 20 wt% 2,6-TDI isomer mixtures or 65 wt% 2 ,4-TDI isomer and 35 wt % 2,6-TDI isomer mixture.

The MDI may be the pure 4,4'-MDI isomer, the pure 2,4'-MDI isomer and any mixture of these two isomers which may further comprise up to 5% by weight of the 2,2'-MDI isomer. Since pure MDI in the solid state is difficult to process, MDI may be a modified isocyanate or a mixture thereof instead of a pure isocyanate.

Modified isocyanates can be prepared, for example, by introducing functional groups into polyisocyanates, examples of which include urethane, allophanate, carbodiimide, uretonimine, isocyanurate, urea or biuret. Of these, isocyanates modified with urethane groups are particularly preferred, which are generally prepared by reacting an isocyanate with a stoichiometric amount or less of an H-functional compound, which can be referred to as an NCO prepolymer.

It is particularly preferred that the polyisocyanate comprises a carbodiimide or uretonimine which can be formed by the targeted catalytic reaction of isocyanates.

The amount of polyisocyanate used may be expressed as an isocyanate index. The isocyanate index of the compositions of the present embodiments may be 60 to 100, preferably 70 to 90. If the isocyanate index is too small, the viscoelasticity of the prepared polyurethane memory foam may be lowered, and the recovery time may be prolonged. On the other hand, if the isocyanate index is too large, the viscoelasticity of the prepared polyurethane memory foam may increase, and the hardness may increase.

The polyurethane memory foam composition according to the present embodiments may include a foaming agent. The foaming agent serves to foam the polyurethane prepared by reacting the above-described polyisocyanate with the polyol mixture to be described later, and the foamed polyurethane has a number of pores formed in the foaming process, so that the weight improves impact resistance and elasticity.

The blowing agent may include at least one of water, methylene chloride, and cyclohexane. For example, the blowing agent may be a combination of two or more of water, methylene chloride, and cyclohexane, but preferably water. In addition, the blowing agent may be 1 to 5 parts by weight, preferably 1.5 to 3.5 parts by weight.

The polyurethane memory foam composition according to the present embodiments may include a polyol mixture. The polyol mixture comprises 10 to 30 parts by weight of a first polyol derived from propylene oxide, 35 to 75 parts by weight of a second polyol derived from a combination of ethylene oxide and propylene oxide, and 15 to 35 parts by weight of a third polyol that is a polyether polymer polyol may include

The first polyol may have a hydroxyl group of 100 to 200 mgKOH/g, the second polyol may have a hydroxyl group of 50 to 200 mgKOH/g, and the third polyol may have a hydroxyl group of 30 to 80 mgKOH/g.

In these examples, the number of functional groups is the average number of OH groups per molecule of polyol, the molecular weight is the average molecular weight, and the hydroxyl value is the number of mg of KOH required to neutralize the acetic acid bound to the acetyl compound obtained from 1 g of the polyol. can

The first polyol may be derived from propylene oxide. For example, the first polyol can be obtained by reacting propylene oxide with a polyfunctional initiator in the presence of a catalyst. In this case, the polyfunctional initiator may be a compound having two or more hydroxyl groups (-OH) or amine groups (-NH ₂ ). For example, the polyfunctional initiator may be glycerin, trimethylolpropane, triethanolamine, pentaerythritol, ethylene glycol, sucrose, or the like. In this case, the catalyst may be, for example, potassium hydroxide, zinc hexacyanocobaltate-t-butanol complex, or the like.

The first polyol derived from propylene oxide may include a polyol having an equivalent structure as well as a polyol obtained by reacting propylene oxide with a polyfunctional initiator in the presence of a catalyst. For example, the first polyol may be polyoxypropylene glycol, polyoxypropylene triol, or a mixture thereof. Preferably, the first polyol may be polyoxypropylene glycol.

The first polyol may have a functional group number of 1 to 5, a molecular weight of 1000 to 6000, and a hydroxyl value of 100 to 200 mgKOH/g, preferably, the number of functional groups is 3, a molecular weight of 1000 to 3000, and hydroxyl value. The number may be 140 to 180 mgKOH/g. The amount of the first polyol used may be 10 to 30 parts by weight.

The second polyol may be derived from a combination of ethylene oxide and propylene oxide. The second polyol can be obtained by reacting ethylene oxide and propylene oxide together or sequentially with a polyfunctional initiator in the presence of a catalyst. The molar ratio of ethylene oxide and propylene oxide used in the reaction may be 90:10 to 60:40, and preferably, 80:20 to 70:30. As the polyfunctional initiator, glycerin, pentaerythritol, ethylene glycol, sucrose, and the like may be used. As the catalyst, potassium hydroxide, zinc hexacyanocobaltate-t-butanol complex, and the like may be used.

The second polyol derived from the combination of ethylene oxide and propylene oxide may include polyols obtained by reacting ethylene oxide and propylene oxide together or sequentially with a polyfunctional initiator in the presence of a catalyst, as well as polyols having an equivalent structure thereto. . For example, the second polyol may be polyoxypropylenetriol.

The second polyol may have a number of functional groups of 1 to 5, a molecular weight of 1000 to 6000, and a hydroxyl group of 30 to 200 mgKOH/g, preferably, the number of functional groups is 3, a molecular weight of 1000 to 4000, and a hydroxyl group may be 40 to 180 mgKOH/g. The amount of the second polyol used may be 35 to 75 parts by weight.

The second polyol, polyoxypropylene triol, may include a first polyoxypropylene triol and a second polyoxypropylene triol having different molar ratios, molecular weights, and hydroxyl values of ethylene oxide and propylene oxide.

For example, the first polyoxypropylene triol may have a molar ratio of ethylene oxide and propylene oxide of 70:30, a molecular weight of 500 to 3000, and a hydroxyl value of 100 to 200 mgKOH/g. On the other hand, the second polyoxypropylene triol may have a molar ratio of ethylene oxide and propylene oxide of 80:20, a molecular weight of 3000 to 6000, and a hydroxyl value of 30 to 80 mgKOH/g. The amount of the first polyoxypropylene triol may be 15 to 35 parts by weight, and the amount of the second polyoxypropylene triol may be 20 to 40 parts by weight.

The third polyol may be a polyether polymer polyol. Polyether polymer polyol may mean a solid polymer made from styrene monomer and acrylonitrile grafted or dispersed in polyether polyol.

Solid polymers are mainly made by radical polymerization of vinyl monomers. At this time, the more unstable the radicals generated, the higher the reactivity and the better the grafting tendency. However, when the radicals are stable, the reactivity is low and the solid polymer becomes unstable. Since acrylonitrile forms unstable radicals, the grafting is done well, but it tends to discolor when used alone, so it is used by mixing it with a styrene monomer. The polyether polyol to which the solid polymer is grafted or dispersed may be derived from a combination of propylene oxide and ethylene oxide. For example, the polyether polyol may have a molar ratio of ethylene oxide to propylene oxide of 10:90 to 40:60, preferably 10:90. In addition, the SAN (Styrene-Acrylonitrile) content of the third polyol may be 30% to 50%.

The third polyol may have a functional group number of 1 to 5, a molecular weight of 1000 to 5000, a hydroxyl value of 30 to 80 mgKOH/g, preferably, the number of functional groups is 3, a molecular weight of 2000 to 4000, and a hydroxyl value may be 40 to 70 mgKOH/g. The amount of the third polyol may be 15 to 35 parts by weight.

The polyurethane memory foam composition according to the present embodiments may further include a foam stabilizer.

The foam stabilizer may facilitate mixing of the raw material of the polyurethane memory foam composition and lower the surface tension of the raw material of the polyurethane memory foam composition. Therefore, it is possible to facilitate the pore growth of the polyurethane memory foam manufactured using the polyurethane memory foam composition, prevent the diffusion of generated gas by lowering the pore-space pressure difference, and prevent the pores from becoming large and non-uniform. In addition, when the viscosity of the polyurethane memory foam composition raw material increases, the destruction of pores due to pore destabilization, coalescence, and pore film thinning are prevented, thereby preventing the collapse of the memory foam, and the raw material after discharging the raw material It can improve the fluidity of the memory foam and make the density of the memory foam uniform.

The foam stabilizer may be a silicone glycol copolymer. However, the present invention is not limited thereto, and it should be construed as including a commercially available material used in the manufacture of polyurethane. For example, the foam stabilizer may be any one of a silicone-based foam stabilizer, an organosilicon-based foam stabilizer, a fluorine-based foam stabilizer, an ionic surfactant, and a non-ionic surfactant, or a mixture of two or more. The amount of the foam stabilizer may be 0.1 to 2 parts by weight.

The polyurethane memory foam composition according to the present embodiments may further include a catalyst, and the catalyst may be a combination of a gelling catalyst and a blowing catalyst.

The gelling catalyst promotes the reaction of the polyisocyanate and polyol mixture to form polyurethane.

The gelling catalyst may be a mixture of dimethylaminoethyl ether and dipropylene glycol. In the mixture of dimethylaminoethyl ether and dipropylene glycol, the weight ratio of dimethylaminoethyl ether and dipropylene glycol may be 60:40 to 70:30, preferably 70:30.

The blowing catalyst promotes the reaction of the polyisocyanate with water to form carbon dioxide.

The blowing catalyst may be a mixture of triethylenediamine and dipropylene glycol. In the mixture of triethylenediamine and dipropylene glycol, the weight ratio of triethylenediamine and dipropylene glycol may be 40:60 to 30:70, preferably, 33:67.

The amount of the gelling catalyst used may be 0.5 to 1.5 parts by weight, and the amount of the blowing catalyst used may be 0.1 to 0.5 parts by weight.

Polyurethane memory foam according to the present embodiments may be manufactured using the polyurethane memory foam composition according to the above-described embodiments.

Polyurethane memory foam may be prepared by mixing a polyurethane memory foam composition in a one-shot process. For example, polyurethane memory foam further comprises a polyisocyanate having two or more isocyanate groups in the molecule, a foaming agent, and a polyol mixture, preferably a foam stabilizer, and a catalyst, these are mixed and then foamed in the form of slabstock foam can be

The polyurethane memory foam according to the present embodiments may have a rebound elasticity value of 10 to 50 at 30°C. Preferably, the polyurethane memory foam according to the present embodiments may have a rebound elasticity value of 20 to 50 at 30° C., and more preferably have a rebound elasticity value of 35 to 50.

The rebound elasticity value is calculated by the following Equation 1 by measuring the height of rebounding and bouncing when an iron bead of a certain height is dropped on a polyurethane memory foam sample having a size of 300 mm in width, 300 mm in length, and 50 mm in thickness, and the unit is %to be.

[Formula 1]

Polyurethane memory foam according to the present embodiments may have a compression set of 0.1 to 1. Preferably, the polyurethane memory foam according to the present embodiments may have a compression set ratio of 0.4 to 0.9, and more preferably, a compression set reduction ratio of 0.6 to 0.8.

For the permanent compression set, a sample of polyurethane memory foam with a size of 50 mm in width, 50 mm in length, and 50 mm in thickness is placed between two parallel metal plates, a spacer of a certain thickness is inserted, and heat treatment is performed for a certain time in an oven maintained at a high temperature. Then, the compression is released, the polyurethane memory foam sample is taken out and left at room temperature for 30 minutes, and then the thickness is measured and calculated by Equation 2 below.

[Equation 2]

The polyurethane memory foam according to the present embodiments may have an air permeability of 150 to 250 L/min. Preferably, the polyurethane memory foam according to the present embodiments may have an air permeability of 170 to 230 L/min.

For the air permeability, load a polyurethane memory foam sample with a size of 50 mm in width, 50 mm in length, and 25 mm in thickness into the ventilation hole, and then adjust the suction fan so that the differential pressure between the front and back is 125 Pa in the thickness direction of the polyurethane memory foam sample to reduce the pressure. In this case, it means the amount of air measured through the sample, and its unit is L/min.

[Example]

Example 1

Polyurethane memory foam was prepared by foaming the polyurethane memory foam composition as shown in Table 1 at 25° C. with a foaming pressure of 120 bar. The density of the prepared polyurethane memory foam was 50 kg/m ³ (25° C., based on 1 atm).

Item ingredient parts by weight first polyol Number of polyoxypropylene glycol functional groups: 3
Molecular Weight: 1000
Hydroxyl value: 168mg KOH/g 20 second polyol Number of polyoxypropylene triol functional groups: 3
Molecular Weight: 2500
Hydroxyl value: 70mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 70:30 55 tertiary polyol Number of polyether polymer polyol functional groups: 3
Molecular Weight: 3000
Hydroxyl value: 56mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 10:90 25 antifoaming agent silicone glycol copolymer 1.0 gelling catalyst A mixture of dimethylaminoethyl ether and dipropylene glycol (70 wt%: 30 wt%) 0.85 blowing catalyst Mixture of triethylenediamine and dipropylene glycol
(33 wt%: 67 wt%) 0.2 blowing agent water 2.1 polyisocyanate Diphenylmethane diisocyanate (MDI) 41.0
(isocyanate index: 80)

Example 2

Polyurethane memory foam was prepared by foaming the polyurethane memory foam composition shown in Table 2 at 25° C. with a foaming pressure of 120 bar. The density of the prepared polyurethane memory foam was 50 kg/m ³ (25° C., based on 1 atm).

Item ingredient parts by weight first polyol Number of polyoxypropylene glycol functional groups: 3
Molecular Weight: 1000
Hydroxyl value: 168mg KOH/g 20 second polyol first polyoxypropylene triol
functional number: 3
Molecular Weight: 1000
Hydroxyl value: 168mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 70:30 25 Second polyoxypropylene triol
functional number: 3
Molecular Weight: 3400
Hydroxyl value: 50mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 80: 20 30 tertiary polyol polyether polymer polyol
functional number: 3
Molecular Weight: 3000
Hydroxyl value: 56mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 10:90 25 antifoaming agent silicone glycol copolymer 1.0 gelling catalyst A mixture of dimethylaminoethyl ether and dipropylene glycol (70 wt%: 30 wt%) 0.85 blowing catalyst Mixture of triethylenediamine and dipropylene glycol
(33 wt%: 67 wt%) 0.2 blowing agent water 2.1 polyisocyanate Diphenylmethane diisocyanate (MDI) 41.0
(isocyanate index: 80)

Comparative Example 1

Polyurethane memory foam was prepared by foaming the polyurethane memory foam composition as shown in Table 3 at 25° C. with a foaming pressure of 120 bar. The density of the prepared polyurethane memory foam was 50 kg/m ³ (25° C., based on 1 atm).

Item ingredient parts by weight first polyol Number of polyoxypropylene glycol functional groups: 3
Molecular Weight: 1000
Hydroxyl value: 168mg KOH/g 20 tertiary polyol Number of polyether polymer polyol functional groups: 3
Molecular Weight: 3000
Hydroxyl value: 56mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 10:90 80 antifoaming agent silicone glycol copolymer 1.0 gelling catalyst A mixture of dimethylaminoethyl ether and dipropylene glycol (70 wt%: 30 wt%) 0.7 blowing catalyst Mixture of triethylenediamine and dipropylene glycol
(33 wt%: 67 wt%) 0.3 blowing agent water 2.1 polyisocyanate Diphenylmethane diisocyanate (MDI) 35.3
(isocyanate index: 80)

Comparative Example 2

Polyurethane memory foam was prepared by foaming the polyurethane memory foam composition as shown in Table 4 at 25° C. with a foaming pressure of 120 bar. The density of the prepared polyurethane memory foam was 50 kg/m ³ (25° C., based on 1 atm).

Item ingredient parts by weight first polyol Number of polyoxypropylene glycol functional groups: 3
Molecular Weight: 1000
Hydroxyl value: 168mg KOH/g 10 second polyol Number of polyoxypropylene triol functional groups: 3
Molecular Weight: 2500
Hydroxyl value: 70mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 70:30 70 tertiary polyol Number of polyether polymer polyol functional groups: 3
Molecular Weight: 3000
Hydroxyl value: 56mg KOH/g
Molar ratio of ethylene oxide and propylene oxide = 10:90 20 antifoaming agent silicone glycol copolymer 0.8 gelling catalyst A mixture of dimethylaminoethyl ether and dipropylene glycol (70 wt%: 30 wt%) 0.5 blowing catalyst Mixture of triethylenediamine and dipropylene glycol
(33 wt%: 67 wt%) 0.1 blowing agent water 2.1 polyisocyanate Diphenylmethane diisocyanate (MDI) 50.8
(isocyanate index: 80)

[Experimental example]

In order to measure the rebound resilience according to the temperature change of the polyurethane memory foams prepared in the Examples and Comparative Examples, each of the prepared polyurethane memory foams was cut to obtain samples with a width of 300 mm, a length of 300 mm, and a thickness of 50 mm, and then The rebound elasticity value (unit: %) for each temperature was measured for the sample, and the values are shown in Table 5. The rebound resilience value was calculated by Equation 1 above by measuring the height of the rebound and bouncing when a 1 m high iron bead was dropped on the sample.

rebound elasticity value temperature Example 1 Example 2 Comparative Example 1 Comparative Example 2 25℃ 6 8 0 2 30℃ 43 48 0 2

In addition, in order to measure the compression set of the polyurethane memory foams prepared in Examples and Comparative Examples, each polyurethane memory foam prepared was cut and a sample of polyurethane memory foam having a size of 50 mm in width, 50 mm in length, and 50 mm in thickness. After obtaining this, this sample is placed between two flat metal plates, a spacer corresponding to 50% of the sample thickness is inserted, and heat treatment is performed in an oven maintained at 70°C for 22 hours, then the compression is released and polyurethane memory is inserted. After taking out the foam sample and leaving it to stand at room temperature for 30 minutes, the thickness was measured and calculated by Equation 2 described above, and the values are shown in Table 6.

permanent compression set Example 1 Example 2 Comparative Example 1 Comparative Example 2 0.74 0.63 1.24 4.3

In addition, in order to measure the air permeability of the polyurethane memory foams prepared in Examples and Comparative Examples, each of the prepared polyurethane memory foams was cut to obtain a sample having a size of 50 mm in width, 50 mm in length, and 25 mm in thickness, and then this sample Apply pressure by adjusting the suction fan so that the differential pressure between the front and back sides in the thickness direction becomes 125 Pa. At this time, measure the amount of air (unit: L/min) measured through the sample, shown in

air permeability Example 1 Example 2 Comparative Example 1 Comparative Example 2 200 227 0 95

Referring to Tables 5 to 7, compared to Comparative Example 1 using a first polyol derived from propylene oxide and a third polyol that is a polyether polymer polyol, a first polyol derived from propylene oxide, ethylene oxide and propylene oxide It was confirmed that Example 1 used including the third polyol, which is a second polyol and polyether polymer polyol derived from a combination of

In addition, when using including the first polyol and the third polyol, and comparing Example 1 and Comparative Example 2 with a different weight part, Example 1 has a higher rebound elasticity value at 30 ° C. to 30 ° C. than Comparative Example 2, and the permanent It was confirmed that the compression set was low and the tool transmittance was high.

In addition, comparing Example 1 and Example 2, the first polyoxypropylene having a different molar ratio, molecular weight and hydroxyl value of ethylene oxide and propylene oxide than Example 1 using polyoxypropylene triol as the second polyol It was confirmed that Example 2 used including the triol and the second polyoxypropylene triol had a higher rebound elasticity value at 30 ° C. to 30 ° C., a lower compression set, and a higher tool permeability.

According to the above-described embodiments, a polyurethane memory foam composition with improved temperature response characteristics and air permeability, and a polyurethane manufactured using the same, by sensitively reacting to a change in the user's posture at high temperature and recovering and air circulation. Memory foam can be provided.

Therefore, according to the present embodiments, it is possible to efficiently distribute pressure at a high temperature and overcome the limitations of the conventional polyurethane memory foam that is too soft, so that the polyurethane memory foam can greatly expand the application range of the polyurethane memory foam. It is possible to provide a foam composition and polyurethane memory foam manufactured using the same.

In addition, according to the present embodiments, the polyurethane memory foam composition and polyurethane memory foam manufactured using the same have high air permeability so that air is circulated when the air is released or introduced due to the pressure caused by the user tossing and turning, so that the polyurethane It is possible to provide a polyurethane memory foam composition that can be used hygienically and cleanly by preventing moisture or odor from occurring inside the memory foam and inhibiting the growth of mold and bacteria, and polyurethane memory foam manufactured using the same. .

The above description is merely illustrative of the technical spirit of the present disclosure, and various modifications and variations will be possible without departing from the essential characteristics of the present disclosure by those skilled in the art to which the present disclosure pertains. In addition, the present embodiments are not intended to limit the technical spirit of the present disclosure, but to explain, and thus the scope of the present technical spirit is not limited by these embodiments. The protection scope of the present disclosure should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present disclosure.

Claims (18)

a polyisocyanate having two or more isocyanate groups in the molecule, a blowing agent and a polyol mixture,
The polyol mixture is
10 to 30 parts by weight of a first polyol derived from propylene oxide;
35 to 75 parts by weight of a second polyol derived from a combination of ethylene oxide and propylene oxide; and
A polyurethane memory foam composition comprising 15 to 35 parts by weight of a third polyol that is a polyether polymer polyol. According to claim 1,
The polyisocyanate is a diisocyanate,
Polyurethane memory foam composition, characterized in that the isocyanate index of the composition is 60 to 100. According to claim 1,
The foaming agent is a polyurethane memory foam composition, characterized in that it comprises at least one of water, methylene chloride, cyclohexane. According to claim 1,
Polyurethane memory foam composition, characterized in that the foaming agent is 1 to 5 parts by weight. According to claim 1,
The first polyol has a hydroxyl group of 100 to 200 mgKOH / g,
The second polyol has a hydroxyl group of 30 to 200 mgKOH / g,
The third polyol is a polyurethane memory foam composition, characterized in that the hydroxyl group is 30 to 80 mgKOH / g. According to claim 1,
The first polyol is a polyurethane memory foam composition, characterized in that polyoxypropylene glycol. According to claim 1,
The second polyol is a polyurethane memory foam composition, characterized in that the polyoxypropylene triol. 8. The method of claim 7,
The polyoxypropylene triol is,
15 to 35 parts by weight of a first polyoxypropylene triol having a molar ratio of ethylene oxide and propylene oxide of 70:30, a molecular weight of 500 to 3000, and a hydroxyl value of 100 to 200; and
A polyurethane memory foam composition comprising 20 to 40 parts by weight of a second polyoxypropylene triol having a molar ratio of ethylene oxide and propylene oxide of 80:20, a molecular weight of 3000 to 6000, and a hydroxyl group of 30 to 80. According to claim 1,
Polyurethane memory foam composition, characterized in that it further comprises a foam stabilizer. 9. The method of claim 8,
The polyurethane memory foam composition, characterized in that the foam stabilizer is 0.1 to 2 parts by weight. According to claim 1,
Polyurethane memory foam composition, characterized in that it further comprises a catalyst, wherein the catalyst is a combination of a gelling catalyst and a blowing catalyst. 12. The method of claim 11,
The gelling catalyst is a polyurethane memory foam composition, characterized in that a mixture of dimethylaminoethyl ether and dipropylene glycol. 12. The method of claim 11,
The blowing catalyst is a polyurethane memory foam composition, characterized in that a mixture of triethylenediamine and dipropylene glycol. 12. The method of claim 11,
The gelling catalyst is 0.5 to 1.5 parts by weight,
The blowing catalyst is a polyurethane memory foam composition, characterized in that 0.1 to 0.5 parts by weight. A polyurethane memory foam manufactured using the polyurethane memory foam composition according to any one of claims 1 to 14. 16. The method of claim 15,
The polyurethane memory foam,
Polyurethane memory foam, characterized in that it has a rebound elasticity value of 10 to 50 at 30 ℃. 16. The method of claim 15,
The polyurethane memory foam,
Polyurethane memory foam, characterized in that it has a compression set of 0.1 to 1. 16. The method of claim 15,
The polyurethane memory foam,
Polyurethane memory foam, characterized in that it has an air permeability of 150 to 250 L / min.