CN109337042A - Steam-cooking cabinet polyurethane foam heat insulation material and preparation method thereof - Google Patents
Steam-cooking cabinet polyurethane foam heat insulation material and preparation method thereof Download PDFInfo
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- CN109337042A CN109337042A CN201811130485.0A CN201811130485A CN109337042A CN 109337042 A CN109337042 A CN 109337042A CN 201811130485 A CN201811130485 A CN 201811130485A CN 109337042 A CN109337042 A CN 109337042A
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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
-
- 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
- C08G18/3278—Hydroxyamines containing at least three hydroxy groups
- C08G18/3281—Hydroxyamines containing at least three hydroxy groups containing three hydroxy groups
-
- 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
- C08G18/28—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
-
- 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
- C08J9/141—Hydrocarbons
-
- 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
-
- 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
-
- 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
- C08J2203/20—Ternary blends of expanding agents
- C08J2203/204—Ternary blends of expanding agents of chemical foaming agent and physical blowing agents
Abstract
The invention belongs to polyurethanes technology fields, and in particular to a kind of steam-cooking cabinet polyurethane foam heat insulation material and preparation method thereof.Steam-cooking cabinet is made of with polyurethane foam heat insulation material component A and B component, component A: polyether polyol A, polyether polyol B, polyether polyol C, crosslinking agent, process auxiliaries, foam stabiliser, chemical foaming agent, catalyst, physical blowing agent；B component is polymeric diphenylmethane diisocyanate.The present invention effectively increases the cohesive force of foam and stainless steel substrate, adhere to foam preferably in substrate surface, using high temperature resistant type main body polyether polyol additional processing aids, increase anti-carbonization and non-deformability of the foam under the conditions of long term high temperature, the use limitation for efficiently solving the common complete high black material material ratio of water high temperature resistant system simultaneously, substantially increases the service life under the operative weldability used and steam-cooking cabinet hot conditions.
Description
Technical field
The invention belongs to polyurethanes technology fields, and in particular to a kind of steam-cooking cabinet polyurethane foam heat insulation material and its system
Preparation Method.
Background technique
Polyurethane foam plastics is anti-under the action of the auxiliary agents such as foaming agent, catalyst by the pure and mild isocyanates of polyether polyols
Answer foamed product obtained.With excellent thermal insulation property, mechanical property, electric property and chemical resistance, especially have
There is excellent heat-insulating property, is widely used in the adiabatic heat-insulations such as refrigerator, freezer, pipeline, battenboard and water heater field.
Steam-cooking cabinet, also known as steam-cooking cabinet, meal braizing machine or rice steaming box.Refer to and is generated heat using electricity, combustion gas, the large-scale kitchen of cooking rice
Baking room equipment.Vehicle body is cabinet body shape, and material is stainless steel, generally multi-purpose 304 stainless steel makings.Steam-cooking cabinet be chiefly used in hotel,
The large size dining room such as army, factory of school.Steam-cooking cabinet can also steam pork, chicken and duck etc. other than being used to steamed rice, steamed bun, steamed stuffed bun
Meat also is specifically used to steam the seafood steam cabinet of seafood, can also stew.Combustion gas steam-cooking cabinet, electric heating can be divided by heating method
The dual-purpose steam-cooking cabinet of steam-cooking cabinet, electric-heating steam.It is steam heated to ripe principle due to using, work long hours can for vapor (steam) temperature in cabinet
Up to 140 DEG C or more, the high temperature resistance for the polyurethane foam for playing insulation effect is proposed under the conditions of long-time service higher
It is required that be easy to cause foamed material carbonization deformation at high temperature, separated with substrate, so that the effect of heat preservation is lost, additionally, due to
Most of cabinet bodies use stainless steel material, this material itself and the cohesive force of polyurethane foam are poor, be easy to produce foam with
The disengaging of substrate does not have better heat insulation effect yet.
Summary of the invention
The purpose of the present invention is overcome the deficiencies of the prior art and provide a kind of steam-cooking cabinet polyurethane foam heat insulation material.
The polyurethane foam heat insulation material and stainless steel cabinet body material have a better cohesive force, the flexibility of foam more preferably, smooth
Surface of stainless steel be easier to adhere to, the deformation of anti-delamination increases service life, has better high temperature resistance, long
Under phase hot conditions using keep foam original state, avoid the occurrence of foam carbonization burn or deformation rate greatly caused by cabinet
The phenomenon that rises is sent out, it is environmental-friendly, it can satisfy the insulation effect under steam-cooking cabinet is used for a long time；Present invention simultaneously provides its preparation sides
Method.
Steam-cooking cabinet polyurethane foam heat insulation material of the present invention, is made of component A and B component, component A and B group
The weight ratio divided is 1:1.0-1.2；Wherein, based on parts by weight, raw material composition is as follows:
Component A:
Polyether polyol A, polyether polyol B and tri- kinds of raw material gross weight numbers of polyether polyol C are 100 parts.
Polyether polyol A is 5-6 degree of functionality, and hydroxyl value is the polyether polyol of 360-400mgKOH/g.
Polyether polyol B is 3-4 degree of functionality, and hydroxyl value is the polyether polyol of 300-340mgKOH/g, and initiator used is
Sorbierite and pentaerythrite.
Polyether polyol C is 4 degrees of functionality, and hydroxyl value is the polyether polyol of 310-370mgKOH/g, and initiator used is first
Base o-phenylenediamine.
B component is polymeric diphenylmethane diisocyanate.
Wherein:
B component is polymeric diphenylmethane diisocyanate, preferably PM200 (Yantai Wanhua Polyurethane Co., Ltd)
Or M20s (BASF AG).
The preferred Inovol R5118G of polyether polyol A, manufacturer is Shandong Inov New Material Co., Ltd.；
The preferred sorbeth polyalcohol Inovol R6332 of polyether polyol B, manufacturer are the one limited public affairs of Nowe new material of Shandong
Department；The preferred NJ-410HN of polyether polyol C, manufacturer are Jurong Ningwu new material limited liability company.
Crosslinking agent is 3 degrees of functionality, and hydroxyl value is the amine small molecule chain extender of 1128mgKOH/g.
Crosslinking agent is triethanolamine (TEA), and manufacturer is Fushun Jia Hua polyurethane Co., Ltd.
Process auxiliaries are to resist heartburn, oxidation resistant CS-29, and manufacturer is Mitugao New Material Group Co., Ltd.
Foam stabiliser is silicone foam stabiliser silicone oil AK8860, and manufacturer is that the Dehua Jiangsu Mei Si share has
Limit company.
Chemical foaming agent is water.
Catalyst is N, N, N ', N ", N "-five methyl diethylentriamine (PC5), N, N- dimethyl cyclohexyl amine (Y-12),
The mixture of N, N- dimethyl benzylamine (Y-27) and potassium acetate.
N, N, N ', N ", N "-five methyl diethylentriamine, N, N- dimethyl cyclohexyl amine, N, the production of N- dimethyl benzylamine
Producer is US Air gasification chemical product Co., Ltd.
N, N, N ', N ", N "-five methyl diethylentriamine belong to strong inspiration catalyst, and initial reaction stage promotes black material and water
Reaction and discharge heat, provide heat with reacting for polyalcohol for later period black material, and to physical blowing agent volatilization taken away
Heat supplement；N, N- dimethyl cyclohexyl amine belong to gel-type catalyst, provide power, shape for the reaction of polyalcohol and black material
At basic polyurethane skeleton and wrap up gaseous Blowing agent molecules formation hole-closing structure；N, N- dimethyl benzylamine are conducive to accelerate
The surface of foam itself cures, and improves the cohesive force of foam and stainless steel substrate；Potassium acetate belongs to stronger rear curing catalysts,
Be conducive to accelerate the frame strength for improving foam that solidifies of reaction later period foam, stable bubble hole structure mentions to increase rate of closed hole
High foam thermal insulation performance.
Physical blowing agent is the mixture of HCFC-141b and pentane, and the content of HCFC-141b is 65-75wt%, positive penta
The content of alkane is 25-35wt%, and above-mentioned percentage is the percentage relative to foaming agent gross mass.
The preparation method of steam-cooking cabinet polyurethane foam heat insulation material of the present invention, specifically includes that steps are as follows:
(1) first load weighted polyether polyol A, polyether polyol B, polyether polyol C and crosslinking agent, process auxiliaries are added
Enter in reaction kettle and stir evenly, then load weighted foam stabiliser, catalyst, chemical foaming agent, physics are added into reaction kettle
Foaming agent stirs 1.0-1.5 hours at normal temperature, obtains component A；
(2) it is reacted in use, component A is proportionally uniformly mixed with B component, prepares steam-cooking cabinet polyurethane
Cellular insulant.
Wherein:
For the control of reaction temperature described in step (2) at 20-24 DEG C, the reaction time is usually according to stopping in a mold
Time calculates, this time is known as open time, in 8-10min or so.
Main body polyether polyol A, B that the present invention uses is that my company's independent research produces, and is used for steam-cooking cabinet poly-
The use environment of urethane foam, the higher functionality polyethers R5118G of research and development, guarantee foaming process in higher crosslink density and
Speed, foamy body significantly improve, while foam has more preferably dimensional stability, avoids out under long term high temperature use condition
Existing problem on deformation, the lower preferable mobility of hydroxyl value guarantee system, while assigning foam and preferably being bonded with stainless steel substrate
Property avoid be used for a long time environment under delamination problems；R6332 polyethers, using combining for sorbierite and pentaerythrite initiator,
The molecular structure of the two is more regular, this just imparts the better dimensional stability of polyethers itself and heat-resisting quantity, is conducive to
It is resistance to carbonization under hot conditions, while there is lower viscosity, it can equilibrium system viscosity problem；Special initiator polyethers NJ-
410HN and small molecule amine cross-linking agent TEA, intensity with higher itself and faster curing performance, while increasing polyurethane
Hard segment content in segment further increases the non-deformability of foam body；Process auxiliaries CS-29 can effectively improve foam and exist
Oxidation resistance under the conditions of long term high temperature, while avoiding high temperature cabonization；The present invention uses 141b and pentane foaming agent phase simultaneously
In conjunction with foaming system, experimental study shows that in terms of high temperature resistant, pentane foaming agent shows better effect, uses simultaneously
141b balances the viscosity of component A system, improves the comprehensive performance of foams.
Compared with the prior art, the present invention has the following beneficial effects:
(1) steam-cooking cabinet polyurethane foam heat insulation material prepared by the present invention, according to the special stainless steel of steam-cooking cabinet itself
The needs of material and applied at elevated temperature environment are voluntarily researched and developed applicable main body polyethers and the suitable process auxiliaries of selection, are effectively improved
The cohesive force of foam and stainless steel material avoids delamination problems from influencing service life；Foam is improved in long term high temperature ring simultaneously
Anti-oxidant and non-deformability under border, suitable polyethers system effectively reduce the black material material of height of common full water high temperature resistant system
Than substantially increasing the service life under the operative weldability used and steam-cooking cabinet hot conditions, there is better heat-resisting quantity
Can, avoid the occurrence of foam carbonization burn or deformation rate it is excessive caused by cabinet hair rise phenomenon, it is high for a long time to can satisfy steam-cooking cabinet
Insulation effect of the temperature under.
(2) preparation method of steam-cooking cabinet polyurethane foam heat insulation material of the present invention, easy, easy to operate, production
Process three-waste free pollution, safety and environmental protection.
Specific embodiment
The invention will be further described with reference to embodiments.
Embodiment 1
The steam-cooking cabinet polyurethane foam heat insulation material, is made of component A and B component, the weight of component A and B component
Amount is than being 1:1.0, in which:
Component A is, based on parts by weight:
B component is PM200.
When preparation, by load weighted polyether polyol A, polyether polyol B, polyether polyol C and crosslinking agent, process auxiliaries
It is added in reaction kettle and stirs, be then proportionally sufficiently mixed load weighted physical blowing agent, be added and weigh into reaction kettle
Foam stabiliser well, catalyst, chemical foaming agent, well-mixed physical blowing agent are stirred 1.0 hours at normal temperature, are obtained
To component A；Component A is uniformly mixed progress instead according to weight ratio 1:1.0 with polymeric diphenylmethane diisocyanate PM200
It answers, prepares steam-cooking cabinet polyurethane foam heat insulation material.
Steam-cooking cabinet prepared by the present embodiment 1 is tested for the property with polyurethane foam heat insulation material, specific targets are such as
Under:
Dimensional stability:
80 DEG C, 95%RH 48h:0.16%
- 30 DEG C, 48h -0.09%
Rate of closed hole 95.8%.
Embodiment 2
The steam-cooking cabinet polyurethane foam heat insulation material, is made of component A and B component, the weight of component A and B component
Amount is than being 1:1.1, in which:
Component A is, based on parts by weight:
B component is M20S.
When preparation, by load weighted polyether polyol A, polyether polyol B, polyether polyol C and crosslinking agent, process auxiliaries
It is added in reaction kettle and stirs, be then proportionally sufficiently mixed load weighted physical blowing agent, be added and weigh into reaction kettle
Foam stabiliser well, catalyst, chemical foaming agent, well-mixed physical blowing agent are stirred 1.5 hours at normal temperature, are obtained
To component A；Component A is uniformly mixed with isocyanates (M20S) according to weight ratio 1:1.1 and is reacted, steam-cooking cabinet use is prepared
Polyurethane foam heat insulation material.
Steam-cooking cabinet prepared by the present embodiment 2 is tested for the property with polyurethane foam heat insulation material, specific targets are such as
Under:
Dimensional stability:
- 30 DEG C, 48h:-0.21%
80 DEG C, 95%RH 48h:0.26%
Rate of closed hole 94.7%.
Embodiment 3
The steam-cooking cabinet polyurethane foam heat insulation material, is made of component A and B component, the weight of component A and B component
Amount is than being 1:1.2, in which:
Component A is, based on parts by weight:
B component is M20S.
When preparation, by load weighted polyether polyol A, polyether polyol B, polyether polyol C and crosslinking agent, process auxiliaries
It is added in reaction kettle and stirs, be then proportionally sufficiently mixed load weighted physical blowing agent, be added and weigh into reaction kettle
Foam stabiliser well, catalyst, chemical foaming agent, well-mixed physical blowing agent are stirred 1.0 hours at normal temperature, are obtained
To component A；Component A is uniformly mixed with isocyanates (M20S) according to weight ratio 1:1.2 and is reacted, steam-cooking cabinet use is prepared
Polyurethane foam heat insulation material.
Steam-cooking cabinet prepared by the present embodiment 3 is tested for the property with polyurethane foam heat insulation material, specific targets are such as
Under:
Dimensional stability:
- 30 DEG C, 48h:-0.23%
80 DEG C, 95%RH 48h:0.31%
Rate of closed hole 95.0%.
Compared with conventional steam-cooking cabinet thermal insulation material system, foaming properties of the present invention are as shown in table 1 below:
1 performance data table of table
| Index | System of the present invention | Conventional system |
| Material is than (POL:ISO) | 1:1.0-1.2 | 1:1.3-1.5 |
| Moulding core density kg/m3 | 34-36 | 36-38 |
| Thermal coefficient W/mK | ≤0.0200 | ≤0.0220 |
| Compressive strength kPa | ≥190 | ≥170 |
| Adhesion strength kPa | ≥200 | ≥180 |
| Low-temperature stability % | ≤0.5 | ≤1.0 |
| High-temperature stability % | ≤0.5 | ≤2.0 |
| Rate of closed hole | >=94% | >=92% |
Claims (10)
1. a kind of steam-cooking cabinet polyurethane foam heat insulation material, which is characterized in that be made of component A and B component, component A and B group
The weight ratio divided is 1:1.0-1.2；Wherein, based on parts by weight, raw material composition is as follows:
Component A:
Polyether polyol A, polyether polyol B and tri- kinds of raw material gross weight numbers of polyether polyol C are 100 parts；
Polyether polyol A is 5-6 degree of functionality, and hydroxyl value is the polyether polyol of 360-400mgKOH/g；
Polyether polyol B is 3-4 degree of functionality, and hydroxyl value is the polyether polyol of 300-340mgKOH/g, and initiator used is sorb
Pure and mild pentaerythrite；
Polyether polyol C is 4 degrees of functionality, and hydroxyl value is the polyether polyol of 310-370mgKOH/g, and initiator used is that methyl is adjacent
Phenylenediamine；
B component is polymeric diphenylmethane diisocyanate.
2. steam-cooking cabinet polyurethane foam heat insulation material according to claim 1, it is characterised in that: crosslinking agent is 3 functions
Degree, hydroxyl value are the amine small molecule chain extender of 1128mgKOH/g.
3. steam-cooking cabinet polyurethane foam heat insulation material according to claim 2, it is characterised in that: crosslinking agent is three ethyl alcohol
Amine.
4. steam-cooking cabinet polyurethane foam heat insulation material according to claim 1, it is characterised in that: process auxiliaries are anti-burning
The heart, oxidation resistant CS-29.
5. steam-cooking cabinet polyurethane foam heat insulation material according to claim 1, it is characterised in that: foam stabiliser is silicon
Ketone foam stabiliser silicone oil AK8860.
6. steam-cooking cabinet polyurethane foam heat insulation material according to claim 1, it is characterised in that: chemical foaming agent is
Water.
7. steam-cooking cabinet polyurethane foam heat insulation material according to claim 1, it is characterised in that: catalyst N, N,
N ', N ", N "-five methyl diethylentriamine, N, N- dimethyl cyclohexyl amine, N, the mixture of N- dimethyl benzylamine and potassium acetate.
8. steam-cooking cabinet polyurethane foam heat insulation material according to claim 1, it is characterised in that: physical blowing agent is
The mixture of HCFC-141b and pentane, the content of HCFC-141b are 65-75wt%, and the content of pentane is 25-35wt%.
9. a kind of preparation method of any steam-cooking cabinet polyurethane foam heat insulation material of claim 1-8, feature exist
In: specifically include that steps are as follows:
(1) first load weighted polyether polyol A, polyether polyol B, polyether polyol C and crosslinking agent, process auxiliaries are added anti-
It answers in kettle and stirs evenly, then load weighted foam stabiliser, catalyst, chemical foaming agent, physical blowing are added into reaction kettle
Agent stirs 1.0-1.5 hours at normal temperature, obtains component A；
(2) it is reacted in use, component A is proportionally uniformly mixed with B component, prepares steam-cooking cabinet polyurethane foam
Thermal insulation material.
10. the preparation method of steam-cooking cabinet polyurethane foam heat insulation material according to claim 9, it is characterised in that: step
Suddenly reaction temperature described in (2) is 20-24 DEG C, open time 8-10min.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114230751A (en) * | 2021-11-30 | 2022-03-25 | 山东一诺威新材料有限公司 | Hard foam polyurethane material for head portrait and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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