CN115584010A - Method for improving wet and heat aging resistance of PUR high-resilience foam - Google Patents
Method for improving wet and heat aging resistance of PUR high-resilience foam Download PDFInfo
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- 239000006260 foam Substances 0.000 title claims abstract description 82
- 230000032683 aging Effects 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003054 catalyst Substances 0.000 claims abstract description 68
- 230000000694 effects Effects 0.000 claims abstract description 34
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 24
- 229920005862 polyol Polymers 0.000 claims abstract description 13
- 150000003077 polyols Chemical class 0.000 claims abstract description 13
- 150000001412 amines Chemical class 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 230000009467 reduction Effects 0.000 claims abstract description 8
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 4
- 229920000570 polyether Polymers 0.000 claims abstract description 4
- 229920000642 polymer Polymers 0.000 claims abstract description 4
- 239000004814 polyurethane Substances 0.000 claims description 84
- 238000006757 chemical reactions by type Methods 0.000 claims description 30
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims description 18
- 239000004094 surface-active agent Substances 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 15
- 230000006872 improvement Effects 0.000 claims description 11
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 8
- -1 amine compound Chemical class 0.000 claims description 8
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 238000004132 cross linking Methods 0.000 claims description 7
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 7
- 238000005457 optimization Methods 0.000 claims description 7
- 238000011160 research Methods 0.000 claims description 7
- 238000012360 testing method Methods 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 238000005187 foaming Methods 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 4
- 238000006731 degradation reaction Methods 0.000 claims description 4
- 230000002209 hydrophobic effect Effects 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000002787 reinforcement Effects 0.000 abstract description 3
- 239000012855 volatile organic compound Substances 0.000 description 9
- 238000006467 substitution reaction Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000007809 chemical reaction catalyst Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- OWIKHYCFFJSOEH-UHFFFAOYSA-N Isocyanic acid Chemical compound N=C=O OWIKHYCFFJSOEH-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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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
-
- 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
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/18—Catalysts containing secondary or tertiary amines or salts thereof
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5415—Silicon-containing compounds containing oxygen containing at least one Si—O bond
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The invention provides a method for improving the wet and heat aging resistance of a PUR high-resilience foam, and relates to the technical field of novel PUR high-resilience foam reinforcement performance. The method comprises the following specific steps: s1, preparing raw materials, namely mixing polyether polyol and polymer polyol by using polyol, wherein the polyol is used as catalyst of sparse amine, and the PUR high-resilience foam is prepared by S2. According to the invention, the mode of replacing and adding the anti-aging agent by the high-activity reactive catalyst can effectively improve the problem of reduction of emission performance and damp-heat-resistant aging performance caused by the use of the reactive catalyst, and the emission performance of the PUR high-resilience foam is greatly improved.
Description
Technical Field
The invention relates to the technical field of novel PUR high-resilience foam reinforcement performance, in particular to a method for improving the wet-heat aging resistance of PUR high-resilience foam.
Background
For the conventional non-reactive catalyst system PUR high resilience foam, tests show that the ratio of amine substances to siloxane substances in the emitted gas is highest, and in order to optimize the emission performance of the conventional non-reactive catalyst system PUR high resilience foam, the emission performance of the conventional non-reactive catalyst system PUR high resilience foam is improved by using a reactive catalyst and a low-emission surfactant, so that the emission of the amine substances and the siloxane substances in the PUR high resilience foam material is greatly reduced, and the odor and the VOC emission performance of the PUR high resilience foam are effectively improved.
But simultaneously, because the reactive amine catalyst participates in the polymerization reaction process of isocyanic acid radical and hydroxyl during the polyurethane synthesis, the disorder degree of the molecular chain growth in the reaction process is increased, the length of the molecular chain segment of polyurethane is reduced, and the number of the urethane polymeric functional groups is increased, thereby having negative influence on the mechanical property and the degradation and aging resistant performance of the PUR high-resilience foam.
Disclosure of Invention
Technical scheme (I)
In order to realize the purpose, the invention is realized by the following technical scheme: a method for improving the wet and heat aging resistance of PUR high-resilience foam comprises the following specific steps:
s1, preparing raw materials, namely mixing polyether polyol and polymer polyol by using more than 1 part of polyol, wherein the used catalysts are all hydrophobic amine catalysts;
s2, preparing the PUR high-resilience foam, namely preparing a sample of the PUR high-resilience foam on the basis of the same formula by aiming at the exploration of factor variables, wherein the sample preparation process is to prepare a sample by molding and foaming by using a square die after manual batching, and the consistency of the lifting state of the PUR high-resilience foam is ensured by finely adjusting the dosage proportion of a catalyst before sample preparation;
s3, improving emission performance, namely improving the emission performance of PUR high resilience foam odor and VOC (volatile organic Compounds) from the two compounds, wherein the main component of the catalyst is an amine compound, and the main component of the surfactant is a siloxane compound, so that the low emission reaction type catalyst and the low emission surfactant are used for improvement;
s4, improving mechanical properties, and researching and verifying addition of auxiliaries, raw material optimization, molecular structure optimization, process parameter adjustment and the like aiming at the problem that the deformation resistance and aging degradation resistance of the high-resilience foam of the low-emission reaction type catalytic system PUR are reduced, so that the performance of the high-resilience foam of the PUR is improved;
s5, verifying that the problem of the reduction of the wet-heat aging resistance caused by the use of the reaction type catalyst can be effectively solved by adding the anti-aging agent and replacing the anti-aging agent with the high-activity catalyst through the research of the above measures, and the problem of the reduction of the wet-heat aging resistance caused by the use of the reaction type catalyst can be effectively solved by adding the anti-aging agent and replacing the anti-aging agent with the high-activity catalyst through the research of the above measures.
Preferably, the emission of silicone materials in S3 is reduced by approximately 90% as measured by the PUR high resilience foam emission performance before and after the replacement of low emission surfactant as measured by the 1 cubic cabin complete emission VOC test standard.
Further, in the S3, on one hand, the low-emission surfactant raw material is optimized to reduce the emission of siloxane substances, and on the other hand, the openness of the PUR high-resilience foam is promoted, so that the compound generated in the foaming process of the PUR high-resilience foam is better released in advance.
Furthermore, an anti-aging agent is introduced into the formula of the low-emission reaction type catalyst PUR high-resilience foam in S4, wherein 1 part of the anti-aging agent is an antioxidant, and verification shows that the anti-aging agent can effectively improve the humidity and heat resistance and aging resistance of the PUR high-resilience foam and improve the humidity and heat resistance and aging tensile property of the PUR high-resilience foam by 50% on the premise of ensuring the normal-temperature mechanical property of the PUR high-resilience foam.
Furthermore, in the S4, because the reaction type catalyst has an obvious effect of reducing the mechanical property of the PUR high resilience foam, the reaction type catalyst with higher activity is adopted to ensure the same catalytic efficiency, and the dosage of the reaction type catalyst is reduced so as to reduce the adverse effect brought by the reaction type catalyst, and the result shows that the high-activity catalyst can improve the humidity-heat-resistant aging performance of the PUR high resilience foam under the condition of ensuring the normal-temperature mechanical property, in addition, the substitution of the full-reaction type catalyst in a TDI system is successfully realized in the process, and the conventional non-reaction type catalyst is not required to be added to maintain the catalytic efficiency.
Furthermore, in the S4, as the reaction type catalyst can reduce the network cross-linking structure of polyurethane molecules, 2 parts of triethanolamine is added in the formula of the low-emission reaction type catalyst to try to improve the cross-linking structure of the molecules, so that the improvement effect of the TEOA on the mechanical property of the PUR high-resilience foam is researched, and the result shows that the TEOA has no obvious effect on the improvement of the mechanical property of the PUR high-resilience foam and weak effect on the reinforcement of the molecular cross-linking structure.
Furthermore, on the basis of adopting the above measures in S5, the emission performance of the improved PUR high resilience foam is verified and confirmed through a 10L bag VOC test, and as a result, it is found that the mode of adding an anti-aging agent and using a high-activity catalyst for substitution has a more superior improvement effect on the emission amount of formaldehyde and acetaldehyde in the PUR high resilience foam, and especially, the action effect of the high-activity catalyst is more significant, so that not only can the emission amount of formaldehyde and acetaldehyde be reduced by 1 time, but also the overall TVOC emission is further reduced without introducing other emission substances, and in addition, the zero emission of amine substances is successfully realized.
(II) advantageous effects
The invention provides a method for improving the damp-heat aging resistance of PUR high-resilience foam. The method has the following beneficial effects: according to the invention, the mode of replacing and adding the anti-aging agent by the high-activity reactive catalyst can effectively improve the problems of emission performance and damp-heat and aging resistance performance reduction caused by the use of the reactive catalyst, and the emission performance of the PUR high-resilience foam is greatly improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The first embodiment is as follows:
the embodiment of the invention provides a method for improving the wet and heat aging resistance of PUR high-resilience foam, which comprises the following specific steps: preparing raw materials, namely mixing polyether polyol and polymer polyol by using 2-3.5 percent of polyol in percentage by total content, wherein the used catalysts are all hydrophobic amine catalysts; amine compounds and siloxane compounds in polyurethane PUR high resilience foam emissions are mainly derived from amine catalysts and surfactants, and have extremely high specific gravity in PUR high resilience foam emissions in a traditional formula system.
Then, preparing PUR high-resilience foam, namely preparing a sample of the PUR high-resilience foam on the basis of the same formula according to the explored factor variable, wherein the sample preparation process is that a square mould is used for molding, foaming and preparing the sample after manual batching, and the consistency of the lifting state of the PUR high-resilience foam is ensured by finely adjusting the dosage proportion of a catalyst before sample preparation;
then, emission performance is improved, firstly, PUR high resilience foam odor and VOC emission performance are improved from the two compounds, the main component of the catalyst is an amine compound, and the main component of the surfactant is a siloxane compound, so that a low emission reaction type catalyst and a low emission surfactant are used for improvement;
the emission amount of siloxane substances is reduced by nearly 90% by testing the emission performance of the PUR high-resilience foam before and after the replacement of the low-emission surfactant through a test standard of 1 cubic cabin integral emission VOC, on one hand, the emission of the siloxane substances is reduced due to the optimization of the raw material of the low-emission surfactant, and on the other hand, the openness of the PUR high-resilience foam is promoted, so that the compound generated in the foaming process of the PUR high-resilience foam is better released in advance, the low-emission reactive catalyst is continuously used for replacement on the basis of the formula of the low-emission surfactant, and the emission performance of the PUR high-resilience foam before and after the replacement is tested according to a 10L bag method VOC test method.
The emission performance of the PUR high resilience foam can be effectively improved through the improvement of raw materials such as a low emission surfactant, a reactive catalyst and the like, the emission of amine substances, siloxane substances and total TVOC is reduced, and adverse effects on the emission of formaldehyde and acetaldehyde, deformation resistance and damp-heat aging resistance of the PUR high resilience foam can be generated when the reactive catalyst is used;
then, the mechanical property is improved, and the problems of the deformation resistance and the aging degradation resistance of the high-resilience foam of the low-emission reaction type catalytic system PUR are researched and verified from the aspects of addition of an auxiliary agent, raw material optimization, molecular structure optimization, process parameter adjustment and the like, so that the performance of the high-resilience foam of the PUR is improved;
an anti-aging agent is introduced into a formula of a low-emission reaction type catalyst PUR high-resilience foam, wherein the anti-aging agent is 1 part of antioxidant, and the verification proves that the anti-aging agent of the type can effectively improve the humidity-heat aging resistance of the PUR high-resilience foam on the premise of ensuring the normal-temperature mechanical property of the PUR high-resilience foam, so that the humidity-heat aging tensile property of the PUR high-resilience foam is improved by 50 percent. The result shows that the high-activity catalyst can also improve the humidity-heat-aging resistance of the PUR high-resilience foam under the condition of ensuring the normal-temperature mechanical property, in addition, the substitution of a full-reaction catalyst in a TDI system is successfully realized in the process, and the conventional non-reaction catalyst is not required to be added to maintain the catalytic efficiency;
because the reaction type catalyst can reduce the network cross-linking structure of polyurethane molecules, the cross-linking structure of the molecules is tried to be improved by adding triethanolamine accounting for 3-4 percent into the formula of the low-emission reaction type catalyst, so that the improvement effect of the reaction type catalyst on the mechanical property of the PUR high-resilience foam is explored. The results show that TEOA has no obvious effect on improving the mechanical properties of PUR high-resilience foam, and the TEOA has weak effect on strengthening the molecular crosslinking structure
The verification proves that the problem of the reduction of the wet-heat aging resistance caused by the use of the reaction type catalyst can be effectively solved by the research of the measures and the replacement of the anti-aging agent and the high-activity catalyst. The research by the measures is found that the problem of the reduction of the damp-heat resistant aging performance caused by the use of a reaction type catalyst can be effectively solved by adding an anti-aging agent and using a high-activity catalyst for replacement;
on the basis of the measures, the emission performance of the improved PUR high-resilience foam is verified and confirmed through a 10L bag VOC test, and the result shows that the formaldehyde and acetaldehyde emission amount of the PUR high-resilience foam is more excellent in improvement effect by adding an anti-aging agent and using a high-activity catalyst for replacement, particularly the action effect of the high-activity catalyst is more remarkable, so that the emission amount of formaldehyde and acetaldehyde can be reduced by 1 time, the overall TVOC emission is further reduced under the condition that other emission substances are not introduced, and in addition, the zero emission of amine substances is successfully realized.
The mode of replacing and adding the anti-aging agent by the high-activity reactive catalyst can effectively improve the problem of reduced emission performance and damp-heat aging resistance brought by the use of the reactive catalyst, but the mode of adding the anti-aging agent has the risk of introducing other emission substances, the mode of improving the damp-heat aging resistance of the PUR high resilience foam by the TEOA high-functionality crosslinking agent has no obvious effect, and the proper increase of the isocyanic acid index during the adjustment of the hardness of the PUR high resilience foam is beneficial to the improvement of the damp-heat aging resistance of the PUR high resilience foam;
by adopting the measures, the emission performance of the PUR high-resilience foam of the seat is greatly improved, the research and experience are shared with the people, and the development of the environment-friendly, light and comfortable seat is expected to be as thin as possible.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A method for improving the wet and heat aging resistance of PUR high-resilience foam is characterized by comprising the following steps: the method comprises the following specific steps:
s1, preparing raw materials, namely mixing polyether polyol and polymer polyol serving as polyol to perform catalytic reaction, wherein the ratio is 1: (1-2), wherein all the catalysts are hydrophobic amine catalysts;
s2, manufacturing the PUR high-resilience foam, namely preparing a PUR high-resilience foam sample on the basis of the same formula according to the explored factor variable, wherein the sample preparation process is that a square mould is used for molding, foaming and preparing the sample after manual batching, and the consistency of the lifting state of the PUR high-resilience foam is ensured by finely adjusting the dosage proportion of a catalyst before sample preparation;
s3, emission performance improvement, namely, improving the PUR high resilience foam odor and the VOC emission performance from the two compounds, wherein the main component of the catalyst is an amine compound, and the main component of the surfactant is a siloxane compound, so that a low-emission reaction type catalyst and a low-emission surfactant are used for improvement;
s4, improving mechanical properties, and researching and verifying addition of auxiliaries, raw material optimization, molecular structure optimization and process parameter adjustment aiming at the problem that the deformation resistance and aging degradation resistance of the high-resilience foam of the low-emission reaction type catalytic system PUR are reduced, so that the performance of the high-resilience foam of the PUR is improved;
s5, verifying that the problem of the reduction of the wet-heat aging resistance caused by the use of the reaction type catalyst can be effectively solved by adding the anti-aging agent and replacing the anti-aging agent with the high-activity catalyst through the research of the above measures, and the problem of the reduction of the wet-heat aging resistance caused by the use of the reaction type catalyst can be effectively solved by adding the anti-aging agent and replacing the anti-aging agent with the high-activity catalyst through the research of the above measures.
2. The method for improving the wet heat aging resistance of PUR high resilience foam according to claim 1, wherein: and in the S3, the PUR high-resilience foam emission performance before and after the low-emission surfactant is replaced is tested through a 1-cubic cabin whole emission VOC test standard.
3. The method for improving the wet heat aging resistance of PUR high resilience foam according to claim 1, wherein: in the S3, on one hand, the low-emission surfactant raw material is optimized to reduce the emission of siloxane substances, and on the other hand, the openness of the PUR high-resilience foam is promoted, so that the compound generated in the foaming process of the PUR high-resilience foam is better released in advance.
4. The method for improving the wet heat aging resistance of PUR high resilience foam according to claim 1, wherein: in the S4, an anti-aging agent is introduced into a formula of the low-emission reaction type catalyst PUR high-resilience foam.
5. The method for improving the wet heat aging resistance of PUR high resilience foam according to claim 1, wherein: in the S4, because the reaction type catalyst has obvious effect of reducing the mechanical property of the PUR high-resilience foam, the reaction type catalyst with higher activity is adopted to ensure the same catalytic efficiency.
6. The method for improving the wet heat aging resistance of PUR high resilience foam according to claim 1, wherein: in the S4, as the reaction type catalyst can reduce the network cross-linking structure of polyurethane molecules, triethanolamine is added into the formula of the low-emission reaction type catalyst.
7. The method for improving the wet heat aging resistance of PUR high resilience foam according to claim 1, wherein: and in the S5, on the basis of the measures, an anti-aging agent is added, and a high-activity catalyst is used for replacing the formaldehyde and acetaldehyde emission amount of the PUR high-resilience foam.
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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 |
| CN114644747A (en) * | 2021-11-27 | 2022-06-21 | 长春富晟汽车技术研发有限公司 | Method for improving wet and heat aging resistance of PUR high-resilience foam |
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Patent Citations (4)
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