Polyurethane sponge material as well as preparation method and application thereof

Abstract

The invention relates to a polyurethane sponge material as well as a preparation method and application thereof, and relates to the technical field of polyurethane sponge materials. The polyurethane sponge material is prepared from the following raw materials: 5 to 30 parts of polymer polyol, 50 to 80 parts of first polyether polyol, 5 to 30 parts of second polyether polyol, 20 to 70 parts of first modified MDI, 30 to 60 parts of second modified MDI, 0.6 to 4.0 parts of a catalyst, 0.5 to 5 parts of a foam stabilizer, 3 to 20 parts of a foaming agent, 10 to 25 parts of traditional Chinese medicine ointment and 10 to 40 parts of secondary recycled polyurethane particles. By optimizing the formula of the polyurethane sponge material and introducing the traditional Chinese medicine ointment components, the mechanical properties such as tensile strength and rebound rate are remarkably improved, meanwhile, the health care functions such as sleep quality improvement are achieved, and the defects of an existing polyurethane sponge material are overcome.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane sponge materials, and in particular to a polyurethane sponge material and a preparation method and application thereof. Background Art

[0002] At present, in the category of polyurethane sponge, sponge products are generally divided into three categories according to physical properties. Polyurethane can be divided into soft foam and hard foam. The characteristics of soft foam polyurethane are low closed rate of bubbles, good elasticity and softness, and are suitable for making sofas, cushions, soles, etc. Hard foam polyurethane has a higher closed rate, light weight, excellent heat insulation performance, chemical resistance, good electrical properties, and low water absorption. It is mainly used for thermal insulation structural materials in the fields of construction, automobiles, and aviation industries. According to the form. Polyurethane can be liquid or granular. Liquid polyurethane is usually used in foaming technology, such as mattress manufacturing, while granular polyurethane is produced by extrusion, calendering, etc., which is suitable for mechanical equipment, parts, accessories, etc. According to the purpose. Polyurethane products include foam plastics, fibers (such as spandex), elastomers, hard foam, soft foam, etc., which are widely used in home furnishings, construction, daily necessities, transportation, and home appliances.

[0003] The main raw materials of polyurethane sponge include polyurethane raw materials such as polyols and isocyanate compounds, foaming agents, catalysts, stabilizers, etc. The polyurethane sponge material is obtained through stirring, mixing, foaming and curing. However, the existing polyurethane sponge materials have defects such as poor mechanical properties and single functions, which cannot meet the use requirements of certain specific fields. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a polyurethane sponge material and a preparation method and application thereof.

[0005] In a first aspect, the present invention provides a polyurethane sponge material, which comprises the following raw materials in parts by weight:

[0006] 5-30 parts of polymer polyol, 50-80 parts of first polyether polyol, 5-30 parts of second polyether polyol, 20-70 parts of first modified MDI, 30-60 parts of second modified MDI, 0.6-4.0 parts of catalyst, 0.5-5 parts of foam stabilizer, 3-20 parts of foaming agent, 10-25 parts of traditional Chinese medicine ointment, and 10-40 parts of secondary recycled polyurethane particles;

[0007] The raw materials of the traditional Chinese medicine ointment include: traditional Chinese medicine ointment and secondary recycled polyurethane particles.

[0008] Furthermore, the polymer polyol is polymer polyol CHP-H30.

[0009] Furthermore, the hydroxyl value of the first polyether polyol is 35-39.

[0010] Furthermore, the hydroxyl value of the second polyether polyol is 54-58.

[0011] Furthermore, the first modified MDI contains polymethylene polyphenylene isocyanate and diphenylmethane-4,4'-diisocyanate; and the second modified MDI contains diphenylmethane-4,4'-diisocyanate.

[0012] Furthermore, the foam stabilizer is selected from silicone oil, and the foaming agent is selected from at least one of water and dichloromethane.

[0013] Furthermore, the particle size of the secondary recycled polyurethane particles is 80 to 200 meshes.

[0014] In a second aspect, the present invention provides a method for preparing the polyurethane sponge material according to any one of the first aspects, the preparation method comprising the following steps:

[0015] The raw materials are placed in a container, and flowed into the reaction kettle in proportion using a flow controller and mixed evenly, and then reacted at a temperature of 20-25°C to obtain a reaction product;

[0016] The reaction product flows into a distributor connected to the reaction kettle through a nozzle, and the reactant is extruded to reach a naturally foamed state to obtain the polyurethane sponge material.

[0017] In a third aspect, the present invention provides an application of the polyurethane sponge material described in any one of the first aspect and the second aspect in the preparation of a product with health care functions, wherein the functions of the health care product include: improving sleep quality, enhancing physical fitness and immunity.

[0018] In a fourth aspect, the present invention provides a memory foam with health care function, wherein the memory foam is made of the polyurethane sponge material described in any one of the first aspect and the second aspect.

[0019] The above technical solution provided by the embodiment of the present invention has at least the following advantages compared with the prior art:

[0020] The embodiment of the present invention provides a polyurethane sponge material and a preparation method and application thereof. The present invention optimizes the polyurethane sponge material formula and introduces a traditional Chinese medicine ointment component, which not only significantly improves the mechanical properties such as tensile strength and rebound rate, but also gives it health functions such as improving sleep quality, thereby making up for the shortcomings of existing polyurethane sponge materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 The present invention provides a flowchart of a method for preparing a polyurethane sponge material according to an embodiment of the present invention. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0026] In a first aspect, the present invention provides a polyurethane sponge material, which comprises the following raw materials in parts by weight:

[0027] 5-30 parts of polymer polyol, 50-80 parts of first polyether polyol, 5-30 parts of second polyether polyol, 20-70 parts of first modified MDI, 30-60 parts of second modified MDI, 0.6-4.0 parts of catalyst, 0.5-5 parts of foam stabilizer, 3-20 parts of foaming agent, 10-25 parts of traditional Chinese medicine ointment, and 10-40 parts of secondary recycled polyurethane particles;

[0028] The raw materials of the traditional Chinese medicine ointment include: traditional Chinese medicine ointment and secondary recycled polyurethane particles.

[0029] The invention provides a polyurethane sponge material. By optimizing the polyurethane sponge material formula and introducing a traditional Chinese medicine ointment component, the invention not only significantly improves mechanical properties such as tensile strength and rebound rate, but also gives it health functions such as improving sleep quality, thereby making up for the shortcomings of existing polyurethane sponge materials.

[0030] In some specific embodiments, the polymer polyol is polymer polyol CHP-H30.

[0031] In some specific embodiments, the hydroxyl value of the first polyether polyol is 35-39.

[0032] In some specific embodiments, the hydroxyl value of the second polyether polyol is 54-58.

[0033] In some specific embodiments, the first modified MDI contains polymethylene polyphenylene isocyanate and diphenylmethane-4,4'-diisocyanate; and the second modified MDI contains diphenylmethane-4,4'-diisocyanate.

[0034] In some specific embodiments, the foam stabilizer is selected from silicone oil, and the foaming agent is selected from at least one of water and dichloromethane.

[0035] In some specific embodiments, the particle size of the secondary recycled polyurethane particles is 80-200 mesh.

[0036] In a second aspect, the present invention provides a method for preparing the polyurethane sponge material according to any one of the first aspects, such as Figure 1 As shown, the preparation method comprises the following steps:

[0037] The raw materials are placed in a container, and flowed into the reaction kettle in proportion using a flow controller and mixed evenly, and then reacted at a temperature of 20-25°C to obtain a reaction product;

[0038] The reaction product flows into a distributor connected to the reaction kettle through a nozzle, and the reactant is extruded to reach a naturally foamed state to obtain the polyurethane sponge material.

[0039] In a third aspect, the present invention provides an application of the polyurethane sponge material described in any one of the first aspect and the second aspect in the preparation of a product with health care functions, wherein the functions of the health care product include: improving sleep quality, enhancing physical fitness and immunity.

[0040] In a fourth aspect, the present invention provides a memory foam with health care function, wherein the memory foam is made of the polyurethane sponge material described in any one of the first aspect and the second aspect.

[0041] It should be noted that the components and raw materials involved in the polyurethane sponge material and the preparation method and application thereof provided in the embodiments of the present invention can directly use commercially available products unless otherwise specified or described. At the same time, the operation steps involved can be performed with reference to the existing technology or using existing equipment unless otherwise specified.

[0042] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods in the following examples that do not specify specific conditions are usually measured according to national standards. If there is no corresponding national standard, then the conditions recommended by the manufacturer are followed.

[0043] The main raw material information involved in the following examples and comparative examples is as follows:

[0044] Polymer polyol: CHP-30 purchased from Changhua Chemical Technology Co., Ltd. (hydroxyl value 25-29, similar model sy-3630).

[0045] The first polyether polyol: purchased from Nanjing Jinqi Chemical Group Co., Ltd. Model 5041 (hydroxyl value 35-39, similar model SY-1621).

[0046] The second polyether polyol: purchased from CNOOC Shell Petrochemical ED56-200 (hydroxyl value 54-58, similar model SY-220).

[0047] The first modified MDI: purchased from Shanghai Junzhi Chemical 5598 (containing polymethylene polyphenylene isocyanate (P-MDI), 9016-87-9; (content (W / W):>=10%-<90%), diphenylmethane-4,4'-diisocyanate, 101-68-8; (content (W / W):>=1%-<70%), TWA value: 0.005ppm (ACGIHTLV), TWA value: 0.05mg / m 3 (OEL(CN)), STEL value 0.1mg / m3(OEL(CN)), 1,1'-methylenebis[isocyanatobenzene], 26447-40-5.

[0048] The second modified MDI: 9258 purchased from Shanghai Hunsmai Polyurethane Co., Ltd. (containing: diphenylmethane-4,4'-diisocyanate (>=50-<70%), polymethylene 70, polyphenyl polyisocyanate (>=20-<30%); o-(p-isocyanatophenyl)isocyanate 30 acid phenyl ester (>=10-<20%); homopolymer of diphenylmethane-4,4-diisocyanate (>=1-<5%).

[0049] Catalyst: purchased from Best Chemical Co., Ltd., models: A-33, A-300, DMEA, DPA.

[0050] Foam stabilizer: purchased from Bestec Chemical Co., Ltd., model: 580, 6890, 6070.

[0051] Foaming agent: purified water, purchased from Bestec Chemical Co., Ltd.

[0052] Chinese medicine ointment: prescription formula: 100g astragalus; 50g wolfberry; 100g yam; 50g liquorice; 100g codonopsis; 60g atractylodes; 100g polygonatum; 100g meat paste; 60g sheep; 100g isatis root; 100g rhubarb; 50g white cyperus root; 60g Ligustrum lucidum; 50g mulberry; 100g prepared rehmannia; 50g scutellaria; 60g poria; 60g knotweed; the preparation method of Chinese medicine ointment is as follows: select the above Chinese medicine ointment materials, cut the medicine materials, remove impurities and bad parts; prepare the steamer and drying net. Put the medicine materials into the steamer, add water to steam the medicine materials, put them into the drying net, place them in the air dryer, and air dry until 80% of the water is removed, repeat nine times. The nutrients of the medicine materials have been fully stimulated and dried. Grind and soak the medicinal materials, add them into a clay pot and boil them into a paste (the heat should be controlled and stirred during the process so that the various medicinal materials can be evenly mixed).

[0053] Secondary recycling of polyurethane particles: Clean and dry the polyurethane scraps and old waste materials, and cut or crush and sieve them before use to obtain polyurethane particles of 0.1 to 0.3 mm.

[0054] Example 1

[0055] This example provides a polyurethane sponge material, which includes the following raw materials in parts by weight:

[0056] 5 parts of polymer polyol, 50 parts of first polyether polyol, 5 parts of second polyether polyol, 20 parts of first modified MDI, 60 parts of second modified MDI, 0.6 parts of catalyst, 5 parts of foam stabilizer, 20 parts of foaming agent, 15 parts of traditional Chinese medicine ointment, and 20 parts of secondary recycled polyurethane particles.

[0057] The preparation method of the above-mentioned polyurethane sponge material comprises the following steps: placing the above-mentioned raw materials in a container, using a flow controller to make the components flow into a reactor in the above-mentioned proportion and mix evenly, controlling the temperature at 22°C for chemical reaction, and the reaction time is 4 minutes to obtain a reaction product; the reaction product flows into a distributor connected to the reactor through a nozzle, and the reactants are squeezed out to reach a natural foaming state to form a polyurethane sponge material.

[0058] The test was carried out in accordance with GB / T24451-2009, and the physical performance test data are as follows: 75% compression permanent deformation rate is 5%, recovery time is 1s, rebound rate is 6%, tensile strength is 35Kpa, elongation is 132%, and tear strength is 65N / m.

[0059] Example 2

[0060] This example provides a polyurethane sponge material, which includes the following raw materials in parts by weight:

[0061] 15 parts of polymer polyol, 70 parts of first polyether polyol, 15 parts of second polyether polyol, 40 parts of first modified MDI, 50 parts of second modified MDI, 1.4 parts of catalyst, 2 parts of foam stabilizer, 10 parts of foaming agent, 25 parts of traditional Chinese medicine ointment, and 40 parts of secondary recycled polyurethane particles.

[0062] The preparation method of the above-mentioned polyurethane sponge material comprises the following steps: placing the above-mentioned raw materials in a container, using a flow controller to make the components flow into a reactor in the above-mentioned proportion and mix evenly, controlling the temperature at 22°C for chemical reaction, and the reaction time is 4 minutes to obtain a reaction product; the reaction product flows into a distributor connected to the reactor through a nozzle, and the reactants are squeezed out to reach a natural foaming state to form a polyurethane sponge material.

[0063] The test was carried out in accordance with GB / T24451-2009, and the physical performance test data are as follows: 75% compression permanent deformation rate is 4%, recovery time is 2s, rebound rate is 9%, tensile strength is 40Kpa, elongation is 115%, and tear strength is 60N / m.

[0064] Example 3

[0065] This example provides a polyurethane sponge material, which includes the following raw materials in parts by weight:

[0066] 12 parts of polymer polyol, 80 parts of first polyether polyol, 30 parts of second polyether polyol, 70 parts of first modified MDI, 30 parts of second modified MDI, 4 parts of catalyst, 5 parts of foam stabilizer, 3 parts of foaming agent, 10 parts of traditional Chinese medicine ointment, and 10 parts of secondary recycled polyurethane particles.

[0067] The preparation method of the above-mentioned polyurethane sponge material comprises the following steps: placing the above-mentioned raw materials in a container, using a flow controller to make the components flow into a reactor in the above-mentioned proportion and mix evenly, controlling the temperature at 22°C for chemical reaction, and the reaction time is 4 minutes to obtain a reaction product; the reaction product flows into a distributor connected to the reactor through a nozzle, and the reactants are squeezed out to reach a natural foaming state to form a polyurethane sponge material.

[0068] The test was carried out in accordance with GB / T24451-2009, and the physical performance test data are as follows: 75% compression permanent deformation rate is 6%, recovery time is 2s, rebound rate is 7%, tensile strength is 47Kpa, elongation is 120%, and tear strength is 63N / m.

[0069] Comparative Example 1

[0070] This example provides a polyurethane sponge material and a preparation method thereof, which differs from Example 3 only in that the first polyether polyol is replaced by the second polyether polyol (ie, the polyether polyols are all the second polyether polyols), and the remaining steps and parameters are the same.

[0071] According to GB / T24451-2009, the tensile strength of the polyurethane sponge material obtained in this example decreased by 29% compared with that in Example 3.

[0072] Comparative Example 2

[0073] This example provides a polyurethane sponge material and a preparation method thereof, which is different from Example 3 only in that the second polyether polyol is replaced by the first polyether polyol (ie, the polyether polyols are all the first polyether polyols), and the remaining steps and parameters are the same.

[0074] According to GB / T24451-2009, the tensile strength of the polyurethane sponge material obtained in this example decreased by 23% compared with that in Example 3.

[0075] Comparative Example 3

[0076] This example provides a polyurethane sponge material and a preparation method thereof, which is different from Example 3 only in that the first modified MDI is replaced by the second modified MDI (ie, all MDIs are the second modified MDI), and the remaining steps and parameters are the same.

[0077] According to GB / T24451-2009, the tensile strength of the polyurethane sponge material obtained in this example decreased by 19% compared with that in Example 3.

[0078] Comparative Example 4

[0079] This example provides a polyurethane sponge material and a preparation method thereof, which is different from Example 1 only in that the second modified MDI is replaced by the first modified MDI (ie, all MDIs are the first modified MDI), and the remaining steps and parameters are the same.

[0080] According to GB / T24451-2009, the tensile strength of the polyurethane sponge material obtained in this example decreased by 26% compared with that in Example 3.

[0081] Test Case

[0082] In this example, the polyurethane sponge materials obtained in the above-mentioned Examples 1 to 3 and Comparative Examples 1 to 4 were made into polyurethane sponge pillows, and then the effect of improving sleep quality was tested.

[0083] Test method: 1) Pretreatment of polyurethane sponge pillow: place the polyurethane sponge pillow in an environment with a humidity of 50% and a temperature of 45°C for accelerated stability treatment for 6 months, and then dry it as a polyurethane sponge pillow test sample; 2) 70 insomniac test subjects were randomly divided into 7 groups, and the polyurethane sponge pillow test samples made of the polyurethane sponge materials obtained in Examples 1 to 3 and Comparative Examples 1 to 4 obtained after the pretreatment in 1) were tried respectively. After two weeks of use, the product usage was scored on a scale of 1 to 10, and the higher the score, the better the effect of improving sleep quality.

[0084] The test results are shown in Table 1.

[0085] Table 1

[0086] Test samples Average score (1 to 10 points) The polyurethane sponge pillow obtained in Example 1 was used 8 The polyurethane sponge pillow obtained by using Example 2 9 The polyurethane sponge pillow obtained by using Example 3 7 The polyurethane sponge pillow obtained in Comparative Example 1 was used 5 The polyurethane sponge pillow obtained by comparative example 2 3 The polyurethane sponge pillow obtained by comparative example 3 4 The polyurethane sponge pillow obtained in Comparative Example 4 was used 3

[0087] It can be seen from Table 1 that, compared with the comparative example, the polyurethane sponge material provided by the embodiment of the present invention has better product stability and a more lasting effect on improving sleep quality.

[0088] In summary, the present invention provides a polyurethane sponge material and a preparation method and application thereof. By optimizing the polyurethane sponge material formula and introducing a traditional Chinese medicine ointment component, not only the mechanical properties such as tensile strength and rebound rate are significantly improved, but also health functions such as improving sleep quality are given to it, thereby making up for the shortcomings of existing polyurethane sponge materials.

[0089] Various embodiments of the present invention may be presented in the form of a range; it should be understood that the description in the form of a range is only for convenience and brevity, and should not be understood as a rigid limitation on the scope of the present invention; therefore, the range description should be considered to have specifically disclosed all possible sub-ranges and single numerical values ​​within the range. For example, the range description from 1 to 6 should be considered to have specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which apply regardless of the range. In addition, whenever a numerical range is indicated herein, it is meant to include any cited number (fractional or integer) within the indicated range.

[0090] The foregoing is merely a specific embodiment of the present invention, which enables those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A polyurethane sponge material, characterized in that: The polyurethane sponge material comprises the following raw materials in parts by weight: 5-30 parts of polymer polyol, 50-80 parts of first polyether polyol, 5-30 parts of second polyether polyol, 20-70 parts of first modified MDI, 30-60 parts of second modified MDI, 0.6-4.0 parts of catalyst, 0.5-5 parts of foam stabilizer, 3-20 parts of foaming agent, 10-25 parts of traditional Chinese medicine ointment, and 10-40 parts of secondary recovered polyurethane particles.

2. The polyurethane sponge material according to claim 1, characterized in that: The polymer polyol is polymer polyol CHP-H30, and the traditional Chinese medicine ointment is obtained according to the prescription of nourishing five internal organs soup, which includes the following components: 100g of astragalus; 50g of wolfberry; 100g of yam; 50g of licorice; 100g of codonopsis; 60g of atractylodes; 100g of polygonatum; 100g of minced meat; 60g of sheep; 100g of isatis root; 100g of rhubarb; 50g of white cypress root; Ligustrum lucidum 60g; mulberry 50g; Rehmannia glutinosa 100g; processed Polygonum multiflorum 50g; Poria 60g; 60g of Polygonum cuspidatum.

3. The polyurethane sponge material according to claim 1, characterized in that: The hydroxyl value of the first polyether polyol is 35-39.

4. The polyurethane sponge material according to claim 1, characterized in that: The hydroxyl value of the second polyether polyol is 54-58.

5. The polyurethane sponge material according to claim 1, characterized in that: The first modified MDI contains isocyanate polymethylene polyphenylene ester and diphenylmethane-4,4'-diisocyanate; and the second modified MDI contains diphenylmethane-4,4'-diisocyanate.

6. The polyurethane sponge material according to claim 1, characterized in that: The foam stabilizer is selected from silicone oil, and the foaming agent is selected from at least one of water and dichloromethane.

7. The polyurethane sponge material according to claim 1, characterized in that: The particle size of the secondary recycled polyurethane particles is 80-200 meshes.

8. A method for preparing the polyurethane sponge material according to any one of claims 1 to 7, characterized in that: The preparation method comprises the following steps: The raw materials are placed in a container, and flowed into the reaction kettle in proportion using a flow controller and mixed evenly, and then reacted at a temperature of 20-25°C to obtain a reaction product; The reaction product flows into a distributor connected to the reaction kettle through a nozzle, and the reactant is extruded to reach a naturally foamed state to obtain the polyurethane sponge material.

9. Use of the polyurethane sponge material according to any one of claims 1 to 8 in the preparation of products with health care functions, characterized in that: The health care functional products have the following effects: improving sleep quality, enhancing physical fitness and immunity.

10. A memory foam with health care function, characterized in that: The memory foam is made of the polyurethane sponge material according to any one of claims 1 to 8.

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