CN112321790A - Low-odor and low-VOC polyurethane foam and preparation method thereof - Google Patents
Low-odor and low-VOC polyurethane foam and preparation method thereof Download PDFInfo
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- CN112321790A CN112321790A CN202011137517.7A CN202011137517A CN112321790A CN 112321790 A CN112321790 A CN 112321790A CN 202011137517 A CN202011137517 A CN 202011137517A CN 112321790 A CN112321790 A CN 112321790A
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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
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4072—Mixtures of compounds of group C08G18/63 with other macromolecular compounds
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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
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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
- C08G18/63—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers
- C08G18/632—Block or graft polymers obtained by polymerising compounds having carbon-to-carbon double bonds on to polymers onto polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
- C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
- C08J9/143—Halogen containing compounds
- C08J9/144—Halogen containing compounds containing carbon, halogen and hydrogen only
-
- 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
- C08G2101/00—Manufacture of cellular products
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/14—Saturated hydrocarbons, e.g. butane; Unspecified hydrocarbons
- C08J2203/142—Halogenated saturated hydrocarbons, e.g. H3C-CF3
Abstract
The invention discloses low-odor and low-VOC polyurethane foam and a preparation method thereof, wherein a mixed material A comprises 50-99 parts of polyether polyol, 1-50 parts of polymer polyether polyol, 0.1-1.5 parts of amine catalyst, 0.1-2 parts of aldehyde catcher, 0.1-1.5 parts of silicone oil, 0.1-9.5 parts of water and 0.1-1.5 parts of foaming agent; the material B is isocyanate; the mass ratio of the material A to the material B is 1:1 to 1.8. Polyether polyol, polymer polyether polyol, an amine catalyst, silicone oil, water and a foaming agent are uniformly mixed; then adding an aldehyde catching agent and uniformly mixing again; mixing and stirring the mixture, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product. The polyurethane foam disclosed by the invention has the advantages of low odor, odor grade not higher than grade 2, low VOC (volatile organic compounds), foam VOC not more than 30ug/g, excellent physical properties of a finished product, and capability of effectively improving the problems of VOC and high odor of the polyurethane foam.
Description
Technical Field
The invention belongs to the technical field of polyurethane foam, and relates to low-odor and low-VOC polyurethane foam and a preparation method thereof.
Background
With the increasing emphasis on environmental protection by consumers, many polyether suppliers have been trying to reduce the aldehyde content of the polyether itself, even develop catalytic polyether to reduce the VOC, especially the aldehyde content of the final foam, but there is no large-scale industrialized product at present. The national standard and the detection method implemented at present are both directed at the limitation of harmful substances in the whole vehicle environment of a passenger vehicle, the detection methods of various automobile manufacturers are not unified, and the unified detection method and standard are not available in the industry for raw material polyether; in addition, raw materials and auxiliaries such as isocyanate, a catalyst, a foam stabilizer, a foaming agent and the like are required in the production process of the foam product, and the odor and VOC (volatile organic compounds) of the product can be increased. As the automobile industry provides a testing method and a standard for VOC (volatile organic compounds) of parts and interior materials, the combined polyether applied to the automobile field also faces the requirement of improving the quality, and not only the requirement of improving the quality of the base material polyether polyol, but also the screening and compounding of additives in the formula are emphasized, such as selecting an environment-friendly catalyst and the like. The GB/T27630 passenger car air quality evaluation guideline formally implemented from 3/1/2012 specifies the concentration requirement of the pentacene trialdehyde in the car air. In recent years, with the acceleration of industrial revolution, the development concept of environmental protection is more deep, the overall requirements of the automobile industry are improved, downstream manufacturers in other polyurethane foam application fields such as furniture and home have more strict requirements on product smell, VOC and the like, and the product quality needs to be further improved.
Chinese patent CN 201810037318.5 relates to a low VOC polyurethane foam and a preparation method thereof, and mainly solves the problems of high VOC value, high content of benzene and aldehyde substances and large smell in the prior art. The technical scheme is that the low-VOC low-odor polyurethane foam is composed of a component A and a component B, wherein the component A and the component B are 1: 0.8-2.0 in percentage by weight, the component A comprises a component A1 and a component A2, the component A1 is composed of polyether polyol, hydrazine hydrate and isocyanate, the component A2 is composed of polyester polyol, a foaming agent, a catalyst, a cross-linking agent and silicone oil, and the component B is isocyanate and a preparation method thereof.
Chinese patent CN20171080642.4 discloses a polyurethane plate with low aldehyde content, which consists of a component A and a component B, wherein the component A is a white material, and the component B is a black material; the polyol in the component A is 10-40 parts of polyurea polyol by weight, wherein the content of formaldehyde is 20ug/g, and the content of acetaldehyde is 9 ug/g.
The technology mentioned in the above patent reduces the VOC content and odor of the product to some extent, but the VOC and odor of the actual polyurethane foam are still high. The polyurethane foam obtained by the preparation method provided by the invention has lower odor (odor grade is not higher than 2) and lower VOC, and the physical properties of the product are excellent.
Disclosure of Invention
The invention provides low-odor and low-VOC polyurethane foam and a preparation method thereof.
The specific technical scheme is as follows:
the polyurethane foam with low odor and low VOC is prepared by mixing a material A and a material B; the mixed material A comprises 50-99 parts of polyether polyol, 1-50 parts of polymer polyether polyol, 0.1-1.5 parts of amine catalyst, 0.1-2 parts of aldehyde catcher, 0.1-1.5 parts of silicone oil, 0.1-9.5 parts of water and 0.1-1.5 parts of foaming agent; the material B is isocyanate; the mass ratio of the material A to the material B is 1:1 to 1.8.
The polyether polyol is a high-activity polyol containing primary hydroxyl, wherein the hydroxyl value of the polyether polyol is 16-70 mg KOH/g, and the apparent functionality of the polyol is 2-8; the contents of formaldehyde, acetaldehyde and acrolein in the high-activity polyol are respectively less than 3 mu g/g.
The polymer polyether polyol is high-activity polymer polyether polyol with the solid content of 40-50%, and the hydroxyl value is 10-25 mgKOH/g; the contents of formaldehyde, acetaldehyde and acrolein in the polymer polyether polyol are respectively less than 5 mu g/g.
The amine catalyst is a reactive low-emission amine catalyst and is a hydroxyl-containing amine catalyst, and comprises one or more of the following components: 2- (2-dimethylamino-ethoxy) ethanol, dimethylethanolamine, trimethylhydroxyethylpropylenediamine, N-bis (dimethylaminopropyl) isopropanolamine or N- (dimethylaminopropyl) diisopropanolamine.
The silicone oil adopts low-atomization and low-emission silicone oil.
The aldehyde catcher is a substance which can prevent or reduce the generation of aldehyde substances in the polyurethane reaction process or can react with the aldehyde groups, and comprises one or more of the following products: AS-88 from melaken or G-330 from austria.
The blowing agent is monofluorodichloroethane.
The isocyanate is one or two of MDI or TDI; the total NCO content of the isocyanate is 20.0-35.0 wt%.
Low odor, low VOC polyurethane foam: the foam odor grade is not higher than 2 grade, and the foam VOC is not more than 30 ug/g.
The preparation method of the low-odor and low-VOC polyurethane foam comprises the following steps:
1) and preparing a combined material A: weighing polyether polyol, polymer polyether polyol, a reactive low-emission amine catalyst, silicone oil, water and a foaming agent according to a formula, uniformly mixing, adding an aldehyde catching agent, and uniformly mixing again;
2) mixing and stirring the mixed A and B isocyanate, and pouring the mixture into a mold;
3) closing the die and curing;
4) and obtaining a finished product.
The preparation method and the polyurethane foam prepared by the method have the advantages of low odor, no more than 2-grade odor, low VOC, no more than 30ug/g foam VOC, excellent physical properties of the finished product, and effective improvement on the problems of VOC and high odor of the polyurethane foam.
Detailed description of the preferred embodiments
After the A material and the B material in the following examples are prepared, the polyurethane foam finished product is obtained through the following steps:
preparing a combined material A: weighing polyether polyol, polymer polyether polyol, dimethylethanolamine, silicone oil, water and a foaming agent according to a formula, uniformly mixing, adding an aldehyde catching agent, and uniformly mixing again. Mixing and stirring the mixed A and B isocyanate, and pouring into a mould. And (5) closing the mold and curing. And obtaining a finished product.
Example 1
The low-odor and low-VOC polyurethane foam comprises the following components in parts by weight: 50 parts of polyether polyol (hydroxyl value is 25mg KOH/g, formaldehyde content is 0.1 mu g/g, acetaldehyde content is 0.1 mu g/g, acrolein content is 2.9 mu g/g), 50 parts of polymer polyether polyol (solid content is 40%, hydroxyl value is 20mg KOH/g, formaldehyde content is 4.9 mu g/g, acetaldehyde content is 0.1 mu g/g, acrolein content is 0.1 mu g/g), 1.5 parts of dimethylethanolamine, 882 parts of aldehyde catching agent AS-882 parts, 1.5 parts of silicone oil, 9.5 parts of water and 1.5 parts of foaming agent. The mass ratio of the material A to the material B is 1:1.
The low odor, low VOC polyurethane foam preparation method of this example:
(1) 1.34Kg of polyether polyol (hydroxyl value is 25mg KOH/g), 1.34Kg of polymer polyether polyol (solid content is 40%, hydroxyl value is 20mg KOH/g), 0.04Kg of dimethylethanolamine, 0.04Kg of silicone oil, 0.26Kg of water and 0.04Kg of foaming agent are mixed uniformly, and then aldehyde catching agent AS-880.05 Kg is added and mixed uniformly again to be used AS material A; the material B is 3.11Kg of MDI
(2) Mixing and stirring the mixed A material and B material isocyanate, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product.
Example 2
The low-odor and low-VOC polyurethane foam comprises the following components in parts by weight: 99 parts of polyether polyol (hydroxyl value of 33mg KOH/G, formaldehyde content of 2.9 mug/G, acetaldehyde content of 1 mug/G and acrolein content of 0.1 mug/G), 1 part of polymer polyether polyol (solid content of 50 percent, hydroxyl value of 10mg KOH/G, formaldehyde content of 0.1 mug/G, acetaldehyde content of 4.9 mug/G and acrolein content of 3 mug/G), 0.1 part of 2- (2-dimethylamino-ethoxy) ethanol, G-3300.1 parts of aldehyde catcher, 0.1 part of silicone oil, 3.5 parts of water and 0.1 part of foaming agent. The mass ratio of the material A to the material B is 1: 1.3.
The low odor, low VOC polyurethane foam preparation method of this example:
(1) 2.59Kg of polyether polyol (hydroxyl value is 25mg KOH/G), 0.026Kg of polymer polyether polyol (solid content is 50 percent, hydroxyl value is 10mg KOH/G), 0.0026Kg of 2- (2-dimethylamino-ethoxy) ethanol, 0.026Kg of silicone oil, 0.092Kg of water and 0.0026Kg of foaming agent are mixed uniformly, then aldehyde catching agent G-3300.0026 Kg is added and mixed uniformly again to be used as material A; the material B was MDI1.78Kg and TDI1.78 Kg.
(2) Mixing and stirring the mixed A material and B material isocyanate, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product.
Example 3
The low-odor and low-VOC polyurethane foam comprises the following components in parts by weight: 75 parts of polyether polyol (hydroxyl value is 50mg KOH/G, formaldehyde content is 1 mu G/G, acetaldehyde content is 2.9 mu G/G, acrolein content is 2 mu G/G), 25 parts of polymer polyether polyol (solid content is 45 percent, hydroxyl value is 18mgKOH/G, formaldehyde content is 3 mu G/G, acetaldehyde content is 2 mu G/G, acrolein content is 4.9 mu G/G), 1 part of N- (dimethylaminopropyl) diisopropanolamine, 1 part of aldehyde catching agent G-3301 part, 1 part of silicone oil, 5 parts of water and 1 part of foaming agent. The mass ratio of the material A to the material B is 1: 1.2.
(1) 1.97Kg of polyether polyol (hydroxyl value is 25mg KOH/G), 0.66Kg of polymer polyether polyol (solid content is 45 percent, and hydroxyl value is 18mg KOH/G), 0.026Kg of N- (dimethylaminopropyl) diisopropanolamine, 0.026Kg of silicone oil, 0.13Kg of water and 0.026Kg of foaming agent are mixed uniformly, and then added with G-3300.026 Kg of aldehyde catcher and mixed uniformly again to be used as material A. The material B is MDI 3.44Kg.
(2) Mixing and stirring the mixed A material and B material isocyanate, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product.
Example 4
The low-odor and low-VOC polyurethane foam comprises the following components in parts by weight: 90 parts of polyether polyol (hydroxyl value of 40mg KOH/g, formaldehyde content of 2 mug/g, acetaldehyde content of 2 mug/g and acrolein content of 1 mug/g), 10 parts of polymer polyether polyol (solid content of 42 percent, hydroxyl value of 25mgKOH/g, formaldehyde content of 2 mug/g, acetaldehyde content of 3 mug/g and acrolein content of 1 mug/g), 0.7 part of N, N-bis (dimethylaminopropyl) isopropanolamine, 0.8 part of aldehyde catching agent AS-881.2 parts, 0.5 part of silicone oil, 7.5 parts of water and 0.7 part of foaming agent. The mass ratio of the material A to the material B is 1: 1.5.
(1) 2.02Kg of polyether polyol (hydroxyl value is 25mg KOH/g), 0.23Kg of polymer polyether polyol (solid content is 42 percent, hydroxyl value is 25mg KOH/g), 0.02Kg of N, N-bis (dimethylaminopropyl) isopropanolamine, 0.02Kg of silicone oil, 0.17Kg of water and 0.02Kg of foaming agent are mixed uniformly, and then aldehyde catching agent AS-880.03 Kg is added and mixed uniformly again to be used AS material A. MDI as material B3.77 Kg.
(2) Mixing and stirring the mixed A material and B material isocyanate, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product.
Example 5
The low-odor and low-VOC polyurethane foam comprises the following components in parts by weight: 60 parts of polyether polyol (hydroxyl value is 70mg KOH/g, formaldehyde content is 1.5 mu g/g, acetaldehyde content is 2.5 mu g/g, acrolein content is 1.5 mu g/g), 40 parts of polymer polyether polyol (solid content is 47%, hydroxyl value is 15mg KOH/g, formaldehyde content is 4 mu g/g, acetaldehyde content is 1 mu g/g, acrolein content is 2 mu g/g), 1.2 parts of trimethyl hydroxyethyl propylene diamine, AS-880.8 parts of aldehyde catching agent, 0.5 part of silicone oil, 0.1 part of water and 0.5 part of foaming agent. The mass ratio of the material A to the material B is 1: 1.8.
(1) 1.32Kg of polyether polyol (hydroxyl value of 70mg KOH/g), 0.88Kg of polymer polyether polyol (solid content of 47 percent and hydroxyl value of 15mg KOH/g), 0.026Kg of trimethyl hydroxyethyl propane diamine, 0.011Kg of silicone oil, 0.002Kg of water and 0.011Kg of foaming agent are mixed uniformly, then aldehyde catching agent AS-880.018 Kg is added and mixed uniformly again to be used AS material A. MDI 4.08Kg as the B material.
(2) Mixing and stirring the mixed A material and B material isocyanate, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product.
The comparative example is a commercial conventional polyurethane foam finish. The polyurethane foams of the comparative examples or examples were tested for properties as shown in Table 1. The foam odor was evaluated using the following method: and randomly inviting 10 individuals to carry out odor comparison, evaluating each foam according to the serious condition of the odor, and taking the average value as the inspection result. Evaluation criteria were divided into 5 grades: grade 1, no peculiar smell; grade 2, slightly peculiar smell; grade 3, peculiar smell but not pungent; grade 4, slightly peculiar smell and pungent; grade 5, pungent odor, intolerable.
And the foam density, compressive strength, thermal conductivity and dimensional stability are tested according to national standards.
TABLE 1 foam Performance index comparison
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example | |
| Odor grade | 1.2 | 1.0 | 1.0 | 1.2 | 1.2 | 4.8 |
| Density kg/m3 | 47.63 | 48.21 | 47.96 | 48.03 | 48.11 | 47.98 |
| Elongation at break% | 116 | 115 | 120 | 118 | 123 | 110 |
| The rebound resilience% | 58 | 56 | 57 | 58 | 58 | 57 |
| Tensile Strength KPa | 168 | 169 | 175 | 172 | 170 | 165 |
| VOC ug/g | 26 | 28 | 27 | 25 | 27 | 150 |
The results of the examples show that the polyurethane foam product prepared by the preparation method has lower VOC, lower odor and excellent mechanical property.
Having generally described this invention, the invention will now be described in further detail with reference to specific examples. For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the purpose of facilitating understanding of the present invention and should not be construed as specifically limiting the present invention.
Unless otherwise specified, various starting materials of the present invention are commercially available. Unless defined or indicated otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In addition, any methods and materials similar or equivalent to those described herein can be used in the methods of the present invention.
Claims (10)
1. A low odor, low VOC polyurethane foam characterized by: the polyurethane foam is a mixed material A and a mixed material B; the mixed material A comprises 50-99 parts of polyether polyol, 1-50 parts of polymer polyether polyol, 0.1-1.5 parts of amine catalyst, 0.1-2 parts of aldehyde catcher, 0.1-1.5 parts of silicone oil, 0.1-9.5 parts of water and 0.1-1.5 parts of foaming agent; the material B is isocyanate; the mass ratio of the material A to the material B is 1:1 to 1.8.
2. The polyurethane foam according to claim 1, wherein the polyol having a polyether polyol hydroxyl value of 16 to 70mg KOH/g and an apparent functionality of 2 to 8 is a primary hydroxyl group-containing highly reactive polyol.
3. The polyurethane foam according to claim 1, wherein the contents of formaldehyde, acetaldehyde and acrolein in the high activity polyol are less than 3 μ g/g, respectively.
4. The polyurethane foam of claim 1, wherein the amine catalyst is a hydroxyl-containing amine catalyst comprising one or more of: 2- (2-dimethylamino-ethoxy) ethanol, dimethylethanolamine, trimethylhydroxyethylpropylenediamine, N-bis (dimethylaminopropyl) isopropanolamine or N- (dimethylaminopropyl) diisopropanolamine.
5. The polyurethane foam according to claim 1, wherein the polymer polyether polyol is a high-activity polymer polyether polyol having a solid content of 40 to 50% and a hydroxyl value of 10 to 25 mgKOH/g.
6. The polyurethane foam of claim 1, wherein the polymer polyether polyol has a formaldehyde, acetaldehyde and acrolein content of less than 5 μ g/g, respectively.
7. The polyurethane foam of claim 1, wherein the aldehyde scavenger is one or more of the following: AS-88 from melaken or G-330 from austria.
8. The polyurethane foam of claim 1, wherein the blowing agent is monofluorodichloroethane.
9. The polyurethane foam of claim 1, wherein the isocyanate has an overall NCO content of 20.0 wt.% to 35.0 wt.%; the isocyanate is one or two of MDI or TDI.
10. The method for preparing low odor and low VOC polyurethane foam of claim 1, characterized in that polyether polyol, polymer polyether polyol, amine catalyst, silicone oil, water and foaming agent of material A and material B are weighed according to the formula and mixed uniformly; then adding an aldehyde catching agent and uniformly mixing again; mixing and stirring the mixed A material and B material isocyanate, and pouring the mixture into a mold; closing the die and curing; and obtaining a finished product.
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| CN116789925A (en) * | 2023-07-07 | 2023-09-22 | 江苏米尔化工科技有限公司 | Formaldehyde-free low-odor polyurethane foam material and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114230745A (en) * | 2021-11-29 | 2022-03-25 | 长春富晟汽车技术研发有限公司 | Low-odor and low-emission TDI polyurethane foam material for automobile seat and preparation method thereof |
| CN114989383A (en) * | 2022-06-11 | 2022-09-02 | 曾涛 | Preparation method of environment-friendly polyurethane foaming agent |
| CN114989383B (en) * | 2022-06-11 | 2024-04-05 | 常州禄泽新材料科技有限公司 | Preparation method of environment-friendly polyurethane foaming agent |
| CN116789925A (en) * | 2023-07-07 | 2023-09-22 | 江苏米尔化工科技有限公司 | Formaldehyde-free low-odor polyurethane foam material and preparation method thereof |
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