CN113248682A - Low-density polyurethane foam material and preparation method and application thereof - Google Patents
Low-density polyurethane foam material and preparation method and application thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/30—Low-molecular-weight compounds
- C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
- C08G18/3271—Hydroxyamines
- C08G18/3275—Hydroxyamines containing two hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4816—Two or more polyethers of different physical or chemical nature mixtures of two or more polyetherpolyols having at least three hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
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- Polyurethanes Or Polyureas (AREA)
Abstract
The application relates to the technical field of polyurethane foam material preparation, in particular to a low-density polyurethane foam material and a preparation method and application thereof, and specifically discloses a low-density polyurethane foam material and a preparation method and application thereof. The low-density polyurethane foam material comprises the following components in parts by weight: 50-70 parts of isocyanate, 80-120 parts of polyether polyol, 0.6-1.5 parts of composite catalyst, 0.6-2.5 parts of surfactant, 3-5 parts of water and 0-1.5 parts of diethanolamine; wherein the isocyanate is formed by mixing isocyanate PM200 and isocyanate 8223; the surfactant is formed by mixing DC2525 and DC 6070; the composite catalyst is formed by mixing NE300 and NE 1070. The low-density polyurethane foaming material can be used for carpets, and has the effects of improving the condition that foams are easy to collapse at the initial stage of foam formation and reducing the density of a system.
Description
Technical Field
The application relates to the technical field of polyurethane foam material preparation, in particular to a low-density polyurethane foam material and a preparation method and application thereof.
Background
After decades of development, the high resilience flexible polyurethane foam plastic wins people's favor with the advantages of excellent hand feeling, better resilience, higher bearing capacity and the like, and gradually becomes the mainstream of the industries of high-grade automobile seats and furniture sofas.
MDI can be used for preparing high resilience foam, MDI has high reaction activity, and the amount of catalyst can be reduced, so that VOC of the foam is reduced; MDI has a relatively wide range of indices within which the hardness and resilience of the foam can be adjusted by varying the index. In addition, MDI has the advantage of environmental protection, and is beneficial to the health of field operators.
In the foaming process of the low-density high-resilience foam of the full MDI system, the using amount of the foaming agent is increased to reduce the density of the system, and the foaming amount is increased, but as the using amount of the foaming agent is increased, more foam cells are generated, larger foam cells are formed, the foam is easy to collapse, and the problem that the foam cannot be sold in the market exists.
Disclosure of Invention
In order to improve the condition that the foam is easy to collapse in the initial stage of foam formation, the application provides a low-density polyurethane foam material and a preparation method and application thereof.
In a first aspect, the present application provides a low-density polyurethane foam material, which adopts the following technical scheme:
a low-density polyurethane foam material comprises the following components in parts by weight:
50-70 parts of isocyanate;
80-120 parts of polyether polyol;
0.6-1.5 parts of composite catalyst;
0.6-2.5 parts of surfactant;
3-5 parts of water;
0-1.5 parts of diethanolamine;
wherein the isocyanate is formed by mixing isocyanate PM200 and isocyanate 8223;
the surfactant is formed by mixing DC2525 and DC 6070;
the composite catalyst is formed by mixing NE300 and NE 1070.
By adopting the technical scheme, isocyanate and polyether polyol are used as foaming main materials, and in the process of preparing the low-density polyurethane foaming material by water foaming, due to the fact that isocyanate PM200 and isocyanate 8223 are compounded, the obtained isocyanate has a synergistic effect, DC2525 and DC6070 are compounded, the obtained high-resilience silicone oil surfactant has a synergistic effect, and after the high-resilience silicone oil surfactant obtained by compounding is compounded with the isocyanate PM200 and the isocyanate 8223, the whole body has a synergistic effect, the flowability of foam in the foaming process is improved, the foam wall has certain strength, the condition that the foam is easy to collapse at the initial stage of foam formation is improved, the fine-pore foam with smooth surface, uniform pore diameter and stability is obtained, and the density of a foaming system is not influenced.
Preferably, the isocyanate PM200 and the isocyanate 8223 are mixed and formed according to the weight ratio of 1 (2.0-2.6).
By adopting the technical scheme, after the isocyanate PM200 and the isocyanate 8223 are compounded according to the weight ratio, the obtained isocyanate has better performance, and has a synergistic effect after being compounded with the DC2525 and the DC6070, so that the isocyanate generates more gas during the foaming reaction while the chain is extended, the density of the foam material is reduced, the flowability of the foam and the strength of a foam wall are better, the condition that the foam is easy to collapse at the initial stage of foam formation is improved, the fine-pore foam with smooth surface, uniform pore diameter and stability is obtained, and the density of the foam material can be reduced.
Preferably, the DC2525 and the DC6070 are mixed according to the weight ratio of 1 (1.8-2.2).
By adopting the technical scheme, the DC6070 is polyurethane molding high-resilience silicone oil and has the characteristics of low viscosity, low VOC and low volatility; the DC2525 high-resilience silicone oil has good wide compatibility; after the DC2525 and the DC6070 are compounded according to the weight ratio, the synergistic effect is achieved, so that the performance of the surfactant is better, and after the surfactant is compounded with the isocyanate PM200 and the isocyanate 8223, the flowability of foam and the strength of a foam wall in the foaming process of the foam can be improved, the condition that the foam is easy to collapse at the initial stage of foam formation is improved, and the density of a foaming system can be reduced.
Preferably, the polyether polyol is formed by mixing one or more of TEP3600, TEP330N and TPE-4800.
By adopting the technical scheme, the TEP3600, the TEP330N and the TPE-4800 are polyether polyols with molecular weights of more than 5000, the functionalities are all more than 2, and the hydroxyl value is between 26.5 and 36.5 mgKOH/g. After one or more of TEP3600, TEP330N and TPE-4800 is used as a foaming main material to be compounded with isocyanate, DC2525 and DC6070, the main reactivity of polyether polyol and isocyanate is greater than that of isocyanate and water, so that the foam wall has certain strength, the foam collapse is reduced, the density of a foaming system is not influenced, and the prepared foam system has good mechanical and physical properties.
Preferably, the polyether polyol is prepared by mixing TEP3600 and TEP330N according to the weight ratio of 1 (3.8-4.2).
By adopting the technical scheme, the hydroxyl value mgKOH/g of TEP3600 is 26.5-29.5, and the hydroxyl value mgKOH/g of TEP-330N is 33.5-36.5. After the TEP3600 and the TEP330N with different hydroxyl values are compounded with the isocyanate, the DC2525 and the DC6070 according to the proportion, the reaction activity of the polyether polyol is enhanced, the reaction rate of the isocyanate and the polyether polyol is promoted, the reaction balance of the isocyanate, the polyether polyol and water in the foaming process can be balanced, the condition that the foam is easy to collapse at the initial stage of foam formation is improved, the smooth, uniform and stable fine-pore foam with the smooth surface and the uniform pore diameter can be obtained, and the density of a foaming system is not influenced.
Preferably, the composite catalyst is formed by mixing NE300 and NE1070 according to the weight ratio of 1 (1.3-1.7).
By adopting the technical scheme, in the system for compounding and foaming NE300 and NE1070 according to the proportion, a small amount of composite catalyst is used, so that the reaction balance of isocyanate, polyether polyol and water in the foaming process can be promoted and balanced, the synergistic effect of DC2525, DC6070 and isocyanate PM200 isocyanate 8223 is promoted, the condition of easy foam collapse at the initial stage of foam formation is favorably improved, and the density of the foaming system can be reduced.
In a second aspect, the present application provides a method for preparing a low-density polyurethane foam material, which adopts the following technical scheme:
a preparation method of a low-density polyurethane foam material comprises the following steps:
s1: mixing and stirring polyether polyol, a composite catalyst, a surfactant, water and diethanol amine to form a material A;
s2: stirring and mixing isocyanate to form a material B;
s3: and (3) injection molding and foaming the material A and the material B.
By adopting the technical scheme, the raw materials are mixed and stirred in batches, the mixing uniformity of the raw materials is improved, the reaction balance of isocyanate, polyether polyol and water is facilitated, the DC2525 and DC6070, the isocyanate PM200 and the isocyanate 8223 fully play a synergistic effect, the foam wall has certain strength in the foaming process of the foam is improved, the foam collapse in the foaming process of the foam is reduced, and a foam system with a smooth surface and uniform cell aperture is formed.
Preferably, in the S1, the stirring speed of the material A is 80-120 r/min; in the S2, the stirring speed of the material B is 80-120 r/min; in the S3, the mixing temperature of the material A is 20-30 ℃, and the injection pressure of the material A is 10-12 MPa; the mixing temperature of the material B is 20-30 ℃, and the injection pressure of the material B is 8-10 MPa.
By adopting the technical scheme, under the above conditions, the fluidity of the foam in the foaming process is improved, and the foam wall has certain strength, so that the foam collapse in the foaming process is reduced, a foam system with a smooth surface and uniform cell aperture is formed, and the density of the foam system is not influenced.
In a third aspect, the application provides an application of a low-density polyurethane foam material, which adopts the following technical scheme: the application of the low-density polyurethane foam material can be applied to automotive carpets.
By adopting the technical scheme, the carpet made of the materials is used in an automobile, the surface of the made carpet is smooth and has no collapse, the overall density of the carpet is low, and the carpet is beneficial to improving the comfort level of people in using the carpet.
In summary, the present application has the following beneficial effects:
1. because the composite material has a synergistic effect after the DC2525 and the DC6070 are compounded with the isocyanate PM200 and the isocyanate 8223, the foam collapse condition at the initial stage of foam formation is improved, the fine-pore foam with smooth surface, uniform pore diameter and stability is obtained, and the density of a foaming system is not influenced;
2. after the TEP3600 and the TEP330N with different hydroxyl values are compounded, the polyether polyol reaction activity is enhanced, the polyether polyol is used in a foaming system, the reaction rate of isocyanate and polyether polyol is promoted, the reaction of the isocyanate, the polyether polyol and water is balanced, the condition that foam is easy to collapse at the initial stage of foam formation is improved, the fine-pore foam with smooth surface, uniform pore diameter and stability is favorably obtained, and the density of the foaming system is reduced.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the examples of the present application are commercially available, except for the following specific descriptions:
polyether polyol TEP330N was obtained from optimization chemistry under the designation TEP 330N;
polyether polyol TEP3600 is obtained from optimization chemistry and is marked by TEP 3600;
polyether polyol is obtained from optimization chemistry, and the trademark is TPE-4800;
NE300 is from EVONIK, and is NE 300;
NE1070 is from EVONIK under the trademark NE 1070;
DC2525 is obtained from EVONIK under the designation DC 2525;
DC6070 is obtained from EVONIK, and is available under the brand name DC 6070;
diethanolamine is obtained from Pasteur, CAS number 111-42-2;
isocyanate PM200 is taken from WANHUA and is marked as PM 200;
isocyanate 8223 is selected from WANHUA with the trade name 8223;
desmodur 1520A18 was obtained from covestro/Coxism and has a cat number 1520A 18;
DC5933 is from Guangzhou city Zong Fang trading Co., Ltd, model number DC 5933;
the stirring kettle is obtained from Tongding machinery manufacturing Co., Ltd, Wenzhou, and has a model of PJ-01D;
the specification of the die used in the application is 30cm × 20cm × 5 cm;
the foaming machine was obtained from Henry machines, Inc. of Germany, model number HK 250.
Examples
Example 1
A low-density polyurethane foam material is prepared by the following steps of:
s1: adding polyether polyol, a composite catalyst, a surfactant, water and diethanol amine into a stirring kettle at the temperature of 25 ℃ and the stirring speed of 120r/min, and mixing and stirring for 3 hours to form a material A;
s2: adding isocyanate into another stirring kettle at the temperature of 25 ℃ and the stirring speed of 120r/min, and stirring and mixing for 3 hours to form a material B;
s3: injecting the material A into a high-pressure foaming machine at 30 ℃ and 12 MPa; injecting the material B into a high-pressure foaming machine at 30 ℃ and under 10MPa to be mixed with the material A, and maintaining the pressure for 3min to obtain the foamed carpet.
Wherein, the isocyanate is formed by mixing isocyanate PM200 and isocyanate 8223 according to the weight ratio of 1: 1.6; the composite catalyst is formed by mixing NE300 and NE1070 according to the weight ratio of 1: 1.1;
the surfactant is prepared by mixing DC2525 and DC6070 according to the weight ratio of 1: 1.4.
Examples 2 to 6
A low-density polyurethane foam, which is different from example 1 in that each component and the corresponding weight thereof are shown in table 1.
TABLE 1 Components and weights (kg) thereof in examples 1-6
Examples 7 to 10
A low-density polyurethane foam different from example 3 in that each component and the corresponding weight thereof are shown in table 2.
TABLE 2 Components and weights (kg) of examples 7-10
Examples 11 to 14
A low-density polyurethane foam different from example 8 in that each component and the corresponding weight thereof are shown in table 3.
TABLE 3 Components and weights (kg) of examples 11-14
Examples 15 to 18
A low-density polyurethane foam different from example 12 in that each component and the corresponding weight thereof are shown in table 4.
TABLE 4 compositions and weights (kg) thereof in examples 15-18
Examples 19 to 22
A low-density polyurethane foam different from example 16 in that each component and the corresponding weight thereof are shown in table 5.
TABLE 5 compositions and weights (kg) thereof in examples 19-22
Examples 23 to 26
A low-density polyurethane foam different from example 20 in that each component and the corresponding weight thereof are shown in table 6.
TABLE 6 compositions and weights (kg) thereof in examples 23-26
Example 27
A low-density polyurethane foam material, which is different from the embodiment 24 in that in the preparation process S1 of the low-density polyurethane foam material, the stirring speed of the material a is 80 r/min; in S2, stirring the material B at a speed of 80 r/min; in S3, the temperature for mixing the material A is 20 ℃, and the injection pressure for mixing the material A is 10 MPa; the mixing temperature of the material B is 20 ℃, and the injection pressure of the material B is 8 MPa.
Example 28
A low-density polyurethane foam material, which is different from the embodiment 24 in that in the preparation process S1 of the low-density polyurethane foam material, the stirring speed of the material a is 100 r/min; in S2, stirring the material B at a speed of 100 r/min; in S3, the temperature for mixing the material A is 25 ℃, and the injection pressure for mixing the material A is 11 MPa; the mixing temperature of the material B is 25 ℃, and the injection pressure of the material B is 9 MPa.
Comparative example
Comparative example 1
Is a polyurethane foaming material which is sold in the market and is taken from the Reuli polymer material strength factory, and the product number is WL-6547.
Comparative examples 2 to 9
A polyurethane foam different from example 1 in that each component and the corresponding weight thereof are shown in table 7.
TABLE 7 compositions and weights (kg) thereof in comparative examples 2-9
Comparative examples 10 to 13
A polyurethane foam different from example 1 in that each component and the corresponding weight thereof are shown in table 8.
TABLE 8 Components and weights (kg) thereof in comparative examples 10-13
Comparative example 14
A polyurethane foam material, which is different from example 1 in that the surfactant is DC 5933.
Comparative example 15
A polyurethane foam, which differs from example 1 in that the isocyanate is Desmodur 1520a 18.
Comparative example 16
A polyurethane foam differs from example 1 in that the surfactant is DC5933 and the isocyanate is Desmodur 1520A 18.
Performance test
The low-density polyurethane foams prepared in examples 1 to 28 and comparative examples 1 to 16 were used as test objects, the size of the low-density polyurethane foam was 150mm x 150mm, the density of the apparent low-density polyurethane foam was measured with reference to GB/T _ 6343-.
TABLE 9 evaluation criteria
The test results are shown in Table 10 below.
Table 10 performance test results as can be seen from the test data in table 10: the low-density polyurethane foams prepared in examples 1 to 28 of the present application all had densities of less than or equal to 58.0 kg/m 3, and the surface cell formation performance was evaluated as good; in comparative example 1, a commercially available low density polyurethane foam having a density equal to 60.0 kg/m 3 had a good surface cell forming property; therefore, the low-density polyurethane foam material prepared by the method has the advantages of low density and good foam performance, can be used in an automobile carpet, enables the surface of the carpet to be smooth and not collapse, is low in overall density and improves the comfort level of people using the carpet. Among them, the low-density polyurethane foam obtained in example 28 of the present application is most preferable.
As can be seen from Table 10, examples 1, examples 7 to 10 and comparative examples 2 to 3 differ in the composition and content of isocyanate PM200 and isocyanate 8223. Analysis of the data in Table 10 shows that the low density polyurethane foam obtained in example 1 has a density equal to 57.5 kg/m 3, and the surface foam forming property is evaluated as good; as can be seen from Table 10, the low-density polyurethanes produced in examples 7 to 10 of the present application are different in the composition and content of isocyanate PM200 and isocyanate 8223 among examples 1, examples 7 to 10 and comparative examples 2 to 5. Analysis of the data in Table 10 shows that the low density polyurethane foam obtained in example 1 has a density equal to 57.5 kg/m 3, and the surface foam forming property is evaluated as good; the low-density polyurethane foam materials prepared in examples 7 to 10 have densities less than or equal to 55.8 kg/m 3, and the performance of forming cells on the surface is evaluated to be good; the polyurethane foams obtained in comparative examples 2 to 5 each had a density of 68.0 kg/m 3 or more, and the surface cell forming property was evaluated as good. Therefore, the isocyanate PM200 and the isocyanate 8223 have a synergistic effect, so that the performance of the compounded isocyanate is better, the condition that foam is easy to collapse at the initial stage of foam formation can be improved, and the density of the foam material is reduced; in the preparation process of the low-density polyurethane foam material, when the isocyanate PM200 and the isocyanate 8223 are mixed according to the weight ratio of 1 (2.0-2.6), the condition that foam collapse is easy at the initial stage of foam formation can be better improved, a fine-pore foam material with a smooth surface is obtained, and the density of the foam material is reduced.
As can be seen from Table 10, examples 1, examples 11 to 14 and comparative examples 6 to 9 differ in the composition and content of DC2525 and DC 6070. As can be seen from the test data in table 10, the low density polyurethane foam obtained in example 1 of the present application has a density equal to 57.5 kg/m 3, and the surface foaming performance was evaluated as good; the low-density polyurethane foams prepared in examples 11 to 14 of the present application all had densities of less than or equal to 55.0 kg/m 3, and the surface cell formation performance was evaluated as good; the polyurethane foams obtained in comparative examples 6 to 9 each had a density of 72.1 kg/m 3 or more, and the evaluation of the cell formation property on the surface was poor. Therefore, DC2525 and DC6070 have a synergistic effect, so that the compounded surfactant has better performance, the condition that foam is easy to collapse at the initial stage of foam formation can be improved, and the density of the foam material is reduced; in the preparation process of the low-density polyurethane foaming material, when DC2525 and DC6070 are mixed according to the weight ratio of 1 (1.8-2.2), the condition that foam is easy to collapse at the initial stage of foam formation is effectively improved, and the density of a foaming system is reduced.
As can be seen from Table 10, examples 1, examples 23 to 26 and comparative examples 10 to 13 differ in the components and amounts of the composite catalysts. Analysis of the data in Table 10 shows that the low density polyurethane foam obtained in example 1 has a density equal to 57.5 kg/m 3, and the surface foam forming property is evaluated as good; the low-density polyurethane foams prepared in examples 23 to 26 of the present application all had densities of less than or equal to 51.6 kg/m 3, and the surface cell formation performance was evaluated as good; comparative examples 10 to 13 each produced a polyurethane foam having a density of 66.0 kg/m 3 or more, and the surface cell forming properties were evaluated as good. Therefore, the NE300 and the NE1070 of the composite catalyst have a synergistic effect, so that the performance of the composite catalyst obtained by compounding is better; in the preparation process of the total raw materials of the low-density polyurethane foaming material, when NE300 and NE1070 are mixed according to the weight ratio of 1 (1.3-1.7), the synergistic effect between DC2525 and DC6070 and between isocyanate PM200 and isocyanate 8223 is promoted, the condition that foam collapse is easy at the initial stage of foam formation is effectively improved, and the density of a foaming system can be reduced.
As can be seen from Table 10, example 1 and comparative examples 14 to 16 differ in the composition of the surfactant and the isocyanate. Analysis of the data in Table 10 shows that the low density polyurethane foam obtained in example 1 has a density equal to 57.5 kg/m 3, and the surface foam forming property is evaluated as good; comparative examples 14-16 produced low density polyurethane foams each having a density greater than or equal to 72.5 kg/m 3 and the carpet surface cell formation performance was evaluated as poor; therefore, the isocyanate obtained by compounding has a synergistic effect with the surfactant, so that the condition that the foam is easy to collapse at the initial stage of foam formation can be improved, and the density of a foaming system can be reduced.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (9)
1. The low-density polyurethane foam material is characterized by comprising the following components in parts by weight:
50-70 parts of isocyanate;
80-120 parts of polyether polyol;
0.6-1.5 parts of composite catalyst;
0.6-2.5 parts of surfactant;
3-5 parts of water;
0-1.5 parts of diethanolamine;
wherein the isocyanate is formed by mixing isocyanate PM200 and isocyanate 8223;
the surfactant is formed by mixing DC2525 and DC 6070;
the composite catalyst is formed by mixing NE300 and NE 1070.
2. The low-density polyurethane foam material as claimed in claim 1, wherein the isocyanate PM200 and the isocyanate 8223 are mixed and formed according to a weight ratio of 1 (2.0-2.6).
3. The low-density polyurethane foam material as claimed in claim 1, wherein the weight ratio of DC2525 to DC6070 is 1 (1.8-2.2).
4. The low-density polyurethane foam material as claimed in claim 1, wherein the polyether polyol is composed of one or more of TEP3600, TEP330N and TPE-4800.
5. The low-density polyurethane foam material as claimed in claim 4, wherein the polyether polyol is prepared by mixing TEP3600 and TEP330N in a weight ratio of 1 (3.8-4.2).
6. The low-density polyurethane foam material as claimed in claim 1, wherein the composite catalyst is prepared by mixing NE300 and NE1070 in a weight ratio of 1 (1.3-1.7).
7. A method for preparing the low-density polyurethane foam material as claimed in any one of claims 1 to 6, which comprises the steps of:
s1: mixing and stirring polyether polyol, a composite catalyst, a surfactant, water and diethanol amine to form a material A;
s2: stirring and mixing isocyanate to form a material B;
s3: and (3) injection molding and foaming the material A and the material B.
8. The method for preparing a low-density polyurethane foam material as claimed in the claim, wherein in the S1, the stirring speed of the material A is 80-120 r/min; in the S2, the stirring speed of the material B is 80-120 r/min; in the S3, the mixing temperature of the material A is 20-30 ℃, and the injection pressure of the material A is 10-12 MPa; the mixing temperature of the material B is 20-30 ℃, and the injection pressure of the material B is 8-10 MPa.
9. Use of the low density polyurethane foam of any one of claims 1 to 8, wherein the sound absorbing polyurethane foam is used in automotive carpets.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110587418.7A CN113248682A (en) | 2021-05-27 | 2021-05-27 | Low-density polyurethane foam material and preparation method and application thereof |
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| CN202110587418.7A CN113248682A (en) | 2021-05-27 | 2021-05-27 | Low-density polyurethane foam material and preparation method and application thereof |
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Citations (5)
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| CN102443134A (en) * | 2011-09-16 | 2012-05-09 | 广东万华容威聚氨酯有限公司 | Polyurethane rigid foam and preparation method thereof |
| CN103087288A (en) * | 2013-02-28 | 2013-05-08 | 天津博信汽车零部件有限公司 | Low-VOC (volatile organic compound) high-resilience polyurethane foam and preparation method thereof |
| CN104149455A (en) * | 2014-08-26 | 2014-11-19 | 宁波拓普集团股份有限公司 | Vehicle-used slowly-springback polyurethane foam composite material |
| CN109320682A (en) * | 2018-09-30 | 2019-02-12 | 山东诺威新材料有限公司 | High rebound foam of automotive seat low-density and preparation method thereof |
| CN110437406A (en) * | 2019-08-30 | 2019-11-12 | 惠彩材料科技(苏州)有限公司 | A kind of low-density semi-hard polyurethane material and preparation method and application |
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- 2021-05-27 CN CN202110587418.7A patent/CN113248682A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102443134A (en) * | 2011-09-16 | 2012-05-09 | 广东万华容威聚氨酯有限公司 | Polyurethane rigid foam and preparation method thereof |
| CN103087288A (en) * | 2013-02-28 | 2013-05-08 | 天津博信汽车零部件有限公司 | Low-VOC (volatile organic compound) high-resilience polyurethane foam and preparation method thereof |
| CN104149455A (en) * | 2014-08-26 | 2014-11-19 | 宁波拓普集团股份有限公司 | Vehicle-used slowly-springback polyurethane foam composite material |
| CN109320682A (en) * | 2018-09-30 | 2019-02-12 | 山东诺威新材料有限公司 | High rebound foam of automotive seat low-density and preparation method thereof |
| CN110437406A (en) * | 2019-08-30 | 2019-11-12 | 惠彩材料科技(苏州)有限公司 | A kind of low-density semi-hard polyurethane material and preparation method and application |
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