CN111303375A - Preparation method of environment-friendly flame-retardant polyurethane artware - Google Patents
Preparation method of environment-friendly flame-retardant polyurethane artware Download PDFInfo
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 73
- 239000003063 flame retardant Substances 0.000 title claims abstract description 73
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 52
- 239000004814 polyurethane Substances 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 229920005862 polyol Polymers 0.000 claims abstract description 47
- 150000003077 polyols Chemical class 0.000 claims abstract description 47
- 239000004721 Polyphenylene oxide Substances 0.000 claims abstract description 31
- 229920000570 polyether Polymers 0.000 claims abstract description 31
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims abstract description 27
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims abstract description 18
- 229920000642 polymer Polymers 0.000 claims abstract description 17
- 150000001412 amines Chemical class 0.000 claims abstract description 14
- 239000003054 catalyst Substances 0.000 claims abstract description 14
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- 239000004088 foaming agent Substances 0.000 claims abstract description 14
- 229920002545 silicone oil Polymers 0.000 claims abstract description 14
- 238000003756 stirring Methods 0.000 claims abstract description 14
- 238000004040 coloring Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 8
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 20
- -1 aldehyde ketone Chemical class 0.000 claims description 10
- 150000001299 aldehydes Chemical class 0.000 claims description 8
- 150000002576 ketones Chemical class 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 150000005846 sugar alcohols Polymers 0.000 claims 1
- 238000006757 chemical reactions by type Methods 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 2
- 238000003786 synthesis reaction Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 239000012855 volatile organic compound Substances 0.000 description 42
- 239000000463 material Substances 0.000 description 12
- 239000008367 deionised water Substances 0.000 description 5
- 229910021641 deionized water Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 229920005830 Polyurethane Foam Polymers 0.000 description 4
- 239000011496 polyurethane foam Substances 0.000 description 4
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 2
- NBBJYMSMWIIQGU-UHFFFAOYSA-N Propionic aldehyde Chemical compound CCC=O NBBJYMSMWIIQGU-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 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
- 230000009286 beneficial effect Effects 0.000 description 1
- ZTQSAGDEMFDKMZ-UHFFFAOYSA-N butyric aldehyde Natural products CCCC=O ZTQSAGDEMFDKMZ-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
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- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
-
- 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
-
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
-
- 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
- C08G2110/00—Foam properties
- C08G2110/0083—Foam properties prepared using water as the sole blowing agent
Landscapes
- 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 belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of an environment-friendly flame-retardant polyurethane handicraft, which comprises the steps of firstly sequentially adding a low-VOC structural flame-retardant polyether polyol A, a low-VOC polyether polyol B, a low-VOC polymer polyol C, a low-volatility reaction type amine catalyst, flame-retardant low-volatility silicone oil, an environment-friendly cross-linking agent and a foaming agent into a mixing kettle, uniformly mixing and stirring at 25 ℃ to obtain a component A, sequentially adding toluene diisocyanate and diphenylmethane diisocyanate into another mixing kettle, uniformly mixing and stirring at 25 ℃ to obtain a component B, rapidly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mold at 60 ℃, aging for 4-6 minutes, then discharging the mold, and coloring the polyurethane handicraft to obtain the environment-friendly flame-retardant polyurethane handicraft, wherein the environment-friendly flame-retardant polyurethane handicraft prepared by the invention has low content of environment-friendly volatile organic matters, good waterproof and flame-retardant performance, soft texture and no fear of breaking.
Description
Technical Field
The invention belongs to the technical field of chemical synthesis, and particularly relates to a preparation method of an environment-friendly flame-retardant polyurethane handicraft.
Background
With the improvement of living standard of people, the pursuit of people for quality of life not only meets the pursuit of living of materials, but also has increasingly wide demand on mental level. The environment-friendly artware rich in artistic expression forms becomes the choice for people to decorate families and office places.
The traditional handicraft is made of glass, pottery clay, wood, metal, plastic and other materials. Artware made of glass, pottery clay, wood and the like is easy to break or damage in the carrying process; the surface of the metal artware made of metal is easy to oxidize and discolor after being exposed in the air for a long time, or the surface of the metal artware is easy to generate electrochemical reaction to cause the surface of the metal artware to be rusted due to the long-time contact with humid air; with the development of 3D printing technology, the artware made of plastic base materials is further favored by people because the artware can meet the personalized requirements of people, but the artware made of plastic materials is easy to become brittle and fragile after long-term thermal oxidation aging. In addition, the plastic artware is heavy in overall mass and inconvenient to carry, and common plastic is relatively poor in flame retardant property and easy to burn in open fire, so that potential safety hazards exist.
With the rapid development of the polyurethane industry, more and more polyurethane artware enters the lives of people. The polyurethane artware is not only environment-friendly and has low content of volatile organic compounds, good flame retardant property, light texture, convenient transportation, corrosion resistance, easy cleaning, good hand feeling and difficult breaking. The polyurethane artware is gradually replacing the traditional artware and is rapidly developed. However, not all polyurethane artware has the characteristics of environmental protection and flame retardance, and therefore, with the rapid development of the polyurethane artware, the quality problem of the polyurethane artware is concerned more and more.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention aims to provide the preparation method of the environment-friendly flame-retardant polyurethane artware, and when the preparation method is used for preparing the polyurethane artware, the environment-friendly flame-retardant polyurethane artware has the advantages of low content of environment-friendly volatile organic matters, good flame retardant property, light texture, convenience in carrying, corrosion resistance, easiness in cleaning, good hand feeling and difficulty in breaking.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of an environment-friendly flame-retardant polyurethane handicraft comprises the following steps:
1) sequentially adding low-VOC structural type flame-retardant polyether polyol A, low-VOC polyether polyol B, low-VOC polymer polyol C, low-volatility reactive amine catalyst, flame-retardant low-volatility silicone oil, environment-friendly cross-linking agent and foaming agent into a mixing kettle, and uniformly mixing and stirring at 25 ℃ to obtain a component A;
2) sequentially adding Toluene Diisocyanate (TDI) and diphenylmethane diisocyanate (MDI) into the other mixing kettle, and uniformly mixing and stirring at 25 ℃ to obtain a component B;
3) and quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mold at 60 ℃, curing for 4-6 minutes, demolding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
Preferably, the component A comprises the following components in parts by weight: 200-300/g of low-VOC structural flame-retardant polyether polyol A, 400-600/g of low-VOC polyether polyol B, 200-300/g of low-VOC polymer polyol C, 4-8/g of low-volatility reactive amine catalyst, 3-6/g of flame-retardant low-volatility silicone oil, 6-10/g of environment-friendly cross-linking agent and 20-50/g of foaming agent.
Preferably, the component B comprises the following components in parts by weight: toluene Diisocyanate (TDI) 210-260/g and diphenylmethane diisocyanate (MDI) 160-210/g.
Preferably, in the step 1), the low-VOC structural flame-retardant polyether polyol A has a total volatile aldehyde ketone content of less than or equal to 5ug/g, and a hydroxyl value: 22-28mgKOH/g, viscosity: 1500-3000 mPa.s.
Preferably, in the step 1), the low-VOC polyether polyol B has a total volatile aldehyde ketone content of less than or equal to 5ug/g, and a hydroxyl value: 28 to 56mgKOH/g, number average molecular weight: 3000-12000.
Preferably, in the step (1), the low VOC polymer polyol C has a total volatile aldehyde ketone content of less than or equal to 5ug/g, a hydroxyl value: 20-32mgKOH/g, solid content: 23 to 45 percent.
(III) advantageous effects
Compared with the prior art, the invention provides a preparation method of an environment-friendly flame-retardant polyurethane handicraft, which has the following beneficial effects:
1. when the preparation method of the environment-friendly flame-retardant polyurethane artware is used for preparing the environment-friendly flame-retardant polyurethane artware, the obtained product has low content of volatile organic compounds, the content of formaldehyde, acetaldehyde, acrolein, acetone and propionaldehyde is obviously superior to the content of the volatile organic compounds of the common polyurethane artware, and the flame retardant property of the obtained product is obviously superior to that of the common polyurethane artware.
2. Compared with the common polyurethane artware, the preparation method of the environment-friendly flame-retardant polyurethane artware adopts the low-VOC polymer polyol to prepare the environment-friendly flame-retardant polyurethane artware, and the content of acrylonitrile and styrene is relatively less, so that the environment-friendly flame-retardant polyurethane artware is more environment-friendly.
Drawings
FIG. 1 shows the results of testing volatile organic compounds and flame retardant properties.
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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: a preparation method of an environment-friendly flame-retardant polyurethane handicraft comprises the following steps:
1) sequentially adding 200g of low-VOC structural flame-retardant polyether polyol A (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g hydroxyl value: 22mgKOH/g, viscosity: 1500mPa.s), 400g of low VOC polyether polyol B (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g, hydroxyl value: 28mgKOH/g, number average molecular weight: 3000) 200g of low VOC polymer polyol C (the total content of volatile aldehyde ketone substances is less than or equal to 5ug/g, hydroxyl value: 20mgKOH/g, solid content: 23 percent), 4g of low-volatility reactive amine catalyst A-33, 3g of flame-retardant low-volatility silicone oil 3555, 6g of environment-friendly cross-linking agent DEOA and 20g of foaming agent deionized water, and the components are mixed and stirred for 20 minutes at 25 ℃ to prepare a component A.
2) 210g of Toluene Diisocyanate (TDI) and 160g of diphenylmethane diisocyanate (MDI) were sequentially added to the mixing tank, and mixed and stirred at 25 ℃ for 10 minutes to prepare a B component.
3) Quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mould at 60 ℃ for curing for 4 minutes, then demoulding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
The component A comprises the following components in parts by weight: the low-VOC flame-retardant polyurethane foam material comprises low-VOC structural flame-retardant polyether polyol A200g, low-VOC polyether polyol B400g, low-VOC polymer polyol C200g, low-volatility reaction type amine catalyst 4g, flame-retardant low-volatility silicone oil 3g, environment-friendly cross-linking agent 6g and foaming agent 20 g.
The component B comprises the following components in parts by weight: 210g of Toluene Diisocyanate (TDI) and 160g of diphenylmethane diisocyanate (MDI).
Example two:
a preparation method of an environment-friendly flame-retardant polyurethane handicraft comprises the following steps:
1) sequentially adding 300g of low-VOC structural flame-retardant polyether polyol A (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g hydroxyl value: 28mgKOH/g, viscosity: 3000mPa.s), 600g of low VOC polyether polyol B (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g, hydroxyl value: 56mgKOH/g, number average molecular weight: 12000) 300g of low VOC polymer polyol C (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g, hydroxyl value: 32mgKOH/g, solid content: 45 percent), 8g of low-volatility reactive amine catalyst A-33, 6g of flame-retardant low-volatility silicone oil 3555, 10g of environment-friendly cross-linking agent DEOA and 50g of foaming agent deionized water. The above materials were mixed and stirred at 25 ℃ for 20 minutes to prepare a component a.
2) 260g of Toluene Diisocyanate (TDI) and 210g of diphenylmethane diisocyanate (MDI) were sequentially added to the mixing tank, and mixed and stirred at 25 ℃ for 10 minutes to prepare a B component.
3) Quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mould at 60 ℃ for curing for 6 minutes, then demoulding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
The component A comprises the following components in parts by weight: the low-VOC flame-retardant polyurethane foam material comprises low-VOC structural flame-retardant polyether polyol A300g, low-VOC polyether polyol B600g, low-VOC polymer polyol C300g, low-volatility reaction type amine catalyst 8g, flame-retardant low-volatility silicone oil 6g, environment-friendly cross-linking agent 10g and foaming agent 50 g.
The component B comprises the following components in parts by weight: 260g of Toluene Diisocyanate (TDI) and 210g of diphenylmethane diisocyanate (MDI).
Example three: a preparation method of an environment-friendly flame-retardant polyurethane handicraft comprises the following steps:
1) sequentially adding 250g of low-VOC structural flame-retardant polyether polyol A (the total content of volatile aldehyde ketone substances is less than or equal to 5ug/g hydroxyl value: 24mgKOH/g, viscosity: 2000mpa.s), 500g of low VOC polyether polyol B (total volatile aldehyde ketone content not more than 5ug/g, hydroxyl value: 34mgKOH/g, number average molecular weight: 5000) 250g of low VOC polymer polyol C (the total content of volatile aldehyde ketone substances is less than or equal to 5ug/g, hydroxyl value: 22mgKOH/g, solid content: 40 percent), 5g of low-volatility reactive amine catalyst A-33, 5g of flame-retardant low-volatility silicone oil 3555, 7g of environment-friendly cross-linking agent DEOA and 30g of foaming agent deionized water. The above materials were mixed and stirred at 25 ℃ for 20 minutes to prepare a component a.
2) 255g of Toluene Diisocyanate (TDI) and 200g of diphenylmethane diisocyanate (MDI) were sequentially added to the mixing tank, and mixed and stirred at 25 ℃ for 10 minutes to prepare a B component.
3) Quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mould at 60 ℃ for curing for 5 minutes, then demoulding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
The component A comprises the following components in parts by weight: the low-VOC flame-retardant polyurethane foam material comprises, by weight, low-VOC structural flame-retardant polyether polyol A250g, low-VOC polyether polyol B500g, low-VOC polymer polyol C250g, low-volatility reaction type amine catalyst 5g, flame-retardant low-volatility silicone oil 5g, environment-friendly cross-linking agent 7g and foaming agent 20-50/g.
The component B comprises the following components in parts by weight: 255g of Toluene Diisocyanate (TDI) and 200g of diphenylmethane diisocyanate (MDI).
Experimental example: a preparation method of an environment-friendly flame-retardant polyurethane handicraft comprises the following steps:
1) sequentially adding 280g of low-VOC structural flame-retardant polyether polyol A (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g hydroxyl value: 26mgKOH/g, viscosity: 2500mPa.s), 550g of low VOC polyether polyol B (the total content of volatile aldehyde ketone substances is less than or equal to 5ug/g, the hydroxyl value: 28mgKOH/g, number average molecular weight: 6000) 220g of low VOC polymer polyol C (the total content of volatile aldehydes and ketones is less than or equal to 5ug/g, hydroxyl value: 25mgKOH/g, solid content: 25 percent) of the flame-retardant low-volatility amine catalyst A-33, 5g of flame-retardant low-volatility silicone oil 3555, 8g of environment-friendly cross-linking agent DEOA and 40g of foaming agent deionized water. The above materials were mixed and stirred at 25 ℃ for 20 minutes to prepare a component a.
2) To the mixing tank were added 240g of Toluene Diisocyanate (TDI) and 200g of diphenylmethane diisocyanate (MDI) in this order, and mixed and stirred at 25 ℃ for 10 minutes to prepare component B.
3) Quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mould at 60 ℃ for curing for 4 minutes, then demoulding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
The component A comprises the following components in parts by weight: the low-VOC flame-retardant polyurethane foam material comprises, by weight, low-VOC structural flame-retardant polyether polyol A280g, low-VOC polyether polyol B550g, low-VOC polymer polyol C220g, low-volatility reaction type amine catalyst 7g, flame-retardant low-volatility silicone oil 5g, environment-friendly cross-linking agent 8g and foaming agent 20-50/g.
The component B comprises the following components in parts by weight: 240g of Toluene Diisocyanate (TDI) and 200g of diphenylmethane diisocyanate (MDI).
Comparative example: a preparation method of an environment-friendly flame-retardant polyurethane handicraft comprises the following steps:
1) to the mixing kettle were added in sequence 600g of a common polyether polyol B (hydroxyl value: 28mgKOH/g, number average molecular weight: 3000) 200g of a conventional polymer polyol C (hydroxyl value: 20mgKOH/g, solid content: 23 percent), 4g of low-volatility reactive amine catalyst A-33, 3g of flame-retardant low-volatility silicone oil 3555, 6g of environment-friendly cross-linking agent DEOA, and 20g of foaming agent deionized water. The above materials were mixed and stirred at 25 ℃ for 20 minutes to prepare a component a.
2) 210g of Toluene Diisocyanate (TDI) and 160g of diphenylmethane diisocyanate (MDI) were sequentially added to the mixing tank, and mixed and stirred at 25 ℃ for 10 minutes to prepare a B component.
3) Quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mould at 60 ℃ for curing for 4 minutes, then demoulding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that 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 (6)
1. A preparation method of environment-friendly flame-retardant polyurethane artware is characterized by comprising the following steps: the method comprises the following steps:
1) sequentially adding low-VOC structural type flame-retardant polyether polyol A, low-VOC polyether polyol B, low-VOC polymer polyol C, low-volatility reactive amine catalyst, flame-retardant low-volatility silicone oil, environment-friendly cross-linking agent and foaming agent into a mixing kettle, and uniformly mixing and stirring at 25 ℃ to obtain a component A;
2) sequentially adding Toluene Diisocyanate (TDI) and diphenylmethane diisocyanate (MDI) into the other mixing kettle, and uniformly mixing and stirring at 25 ℃ to obtain a component B;
3) and quickly and uniformly stirring the component A and the component B at 25 ℃, pouring the mixture into a constant-temperature mold at 60 ℃, curing for 4-6 minutes, demolding, and coloring the polyurethane artware to obtain the environment-friendly flame-retardant polyurethane artware.
2. The preparation method of the environment-friendly flame-retardant polyurethane handicraft according to claim 1, wherein the component A comprises the following components in parts by weight: 200-300/g of low-VOC structural flame-retardant polyether polyol A, 400-600/g of low-VOC polyether polyol B, 200-300/g of low-VOC polymer polyol C, 4-8/g of low-volatility reactive amine catalyst, 3-6/g of flame-retardant low-volatility silicone oil, 6-10/g of environment-friendly cross-linking agent and 20-50/g of foaming agent.
3. The preparation method of the environment-friendly flame-retardant polyurethane handicraft according to claim 1, characterized in that: the component B comprises the following components in parts by weight: toluene Diisocyanate (TDI) 210-260/g and diphenylmethane diisocyanate (MDI) 160-210/g.
4. The preparation method of the environment-friendly flame-retardant polyurethane artware according to claim 1, wherein in the step 1), the low-VOC structural flame-retardant polyether polyol A has a total content of volatile aldehydes and ketones of less than or equal to 5ug/g, and a hydroxyl value: 22-28mgKOH/g, viscosity: 1500-3000 mPa.s.
5. The preparation method of the environment-friendly flame-retardant polyurethane handicraft according to claim 1, characterized in that: in the step 1), the low VOC polyether polyol B has a total content of volatile aldehyde ketone substances of less than or equal to 5ug/g, and a hydroxyl value: 28 to 56mgKOH/g, number average molecular weight: 3000-12000.
6. The preparation method of the environment-friendly flame-retardant polyurethane handicraft according to claim 1, characterized in that: in the step (1), the low VOC polymer polyalcohol C has the total content of volatile aldehyde ketone substances of less than or equal to 5ug/g, and the hydroxyl value: 20-32mgKOH/g, solid content: 23 to 45 percent.
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Application publication date: 20200619 |