CN108559059A - Polyurethane foams and preparation method thereof - Google Patents
Polyurethane foams and preparation method thereof Download PDFInfo
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- CN108559059A CN108559059A CN201810453972.4A CN201810453972A CN108559059A CN 108559059 A CN108559059 A CN 108559059A CN 201810453972 A CN201810453972 A CN 201810453972A CN 108559059 A CN108559059 A CN 108559059A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4829—Polyethers containing at least three hydroxy groups
-
- 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
- C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
-
- 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
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4205—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups
- C08G18/4208—Polycondensates having carboxylic or carbonic ester groups in the main chain containing cyclic groups containing aromatic 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
- C08G18/70—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
- 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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/797—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing carbodiimide and/or uretone-imine groups
-
- 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
- C08J9/142—Compounds containing oxygen but no halogen atom
-
- 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
- C08J9/147—Halogen containing compounds containing carbon and halogen atoms only
Abstract
The present invention provides a kind of polyurethane foams and preparation method thereof, the polyurethane foams includes that mass ratio is A：B=100:70~80 component A and B component, the component A include polyether polyol, polyester polyol, catalyst, surfactant, fire retardant, chain extender, crosslinking agent and the foam stabiliser of proportional assignment；The B component includes the isocyanates foaming agent and foam stabiliser of proportional assignment.The present invention also provides a kind of preparation methods of polyurethane foams, polyurethane foams made from the preparation method of the polyurethane foams of the present invention effectively improves the antioxygen rate and curing rate of polyurethane foams, while improving the use hardness of polyurethane foams of the present invention.
Description
Technical field
The present invention relates to a kind of polyurethane foams and preparation method thereof, belong to sealing material technical field.
Background technology
Polyurethane foams full name sealing agent of single component polyurethane foam is a kind of high performance foamed material, is commonly called as sending out
Infusion, foamed glue, PU gap fillers, heat-insulating property are optimal in various foamed materials, meanwhile, polyurethane foams has excellent
The different strength of materials is the common thermal insulation material of the field of thermal insulation such as current refrigerator, solar energy, heat distribution pipeline, building, cold chain.Into
One step, polyurethane foams is that aerosol technology and polyurethane foam technology intersect the product combined；It is a kind of by polyurethane
The components such as Yu Ju Wu ﹑ Fa Pao Ji ﹑ catalyst are loaded on the special polyurethane products in pressure-resistant inhalator jar.When material is from inhalator jar
When ejection, the polyurethane materials of foam shape, which can be expanded rapidly and are cured with the moisture in air or the matrix touched, reacts shape
At foam.It is applied widely.Have many advantages, such as that preceding foaming, highly expanded, contraction are small, and the intensity of foam is good, bonding force Gao Gu
Foam after change has the multi-effects such as Tian Feng ﹑ Nian Jie ﹑ Mi Feng ﹑ Ge Re ﹑ sound-absorbings, and being that a kind of Huan guarantor Jie Neng ﹑ are easy to use builds
Material is built, is applicable to Mi and blocks fill a vacancy Bu Feng ﹑ of Lou ﹑ to fix and bond, heat preservation and soundproof is particularly suitable for plastic-steel or aluminum alloy doors and windows
Sealing and plugging between wall and waterproof, however polyurethane foams in the prior art is with the lengthening of usage time, can be by
It gradually aoxidizes, the service life of polyurethane foams is caused to substantially reduce.
In view of this, it is necessory to provide a kind of new polyurethane foams and preparation method thereof, to solve the above problems.
Invention content
The purpose of the present invention is to provide a kind of preparation method of polyurethane foams, polyurethane foams of the invention
Preparation method preparation process is simple, convenient to promote the use of on a large scale.
For achieving the above object, the present invention provides a kind of polyurethane foams, the polyurethane foams includes
Mass ratio is A：B=100:70~80 component A and B component, the component A are made of following raw material (mass percent)：
The B component is made of following raw material (mass percent)：
Isocyanates 75~90%
Foaming agent 45~55%
Foam stabiliser 5~10%.
As a further improvement on the present invention, the polyether polyol is using glycerine as initiator, and number-average molecular weight is
4500~5000, and the polypropylene oxide trihydroxylic alcohol blocked with propylene oxide.
As a further improvement on the present invention, the polyester polyol is the aromatic series that number-average molecular weight is 4500~5000
Polyester polyol.
As a further improvement on the present invention, the isocyanates is toluene di-isocyanate(TDI), pure MDI, carbodiimides
At least two of modified MDI and MDI-50 mix.
As a further improvement on the present invention, the catalyst is dimethyl cyclohexyl amine, dimethyl benzylamine, triethylamine, pyrrole
Any one or more combination in pyridine.
As a further improvement on the present invention, the surfactant is the castor-oil plant sodium alkoxide of poly methylsiloxane and sulfonation
Salt.
As a further improvement on the present invention, the polyurethane foams also includes that 0.5~1% borax and 0.5~2% are poly-
Vinyl alcohol.
The present invention also provides a kind of preparation methods of polyurethane foams, include the following steps：
Component A is made, by polyether polyol, polyester polyol, catalyst, surfactant, fire retardant, chain extender and friendship
Connection agent, which is transferred in reaction kettle, stirs 60min, and the speed of agitator of the reaction kettle is 250~270r/min, and controls described anti-
It is 40 DEG C to answer the temperature in kettle；Foaming agent is added after stirring 60min in the reaction kettle to continue to stir 30min；
B component is made, isocyanates, foam stabiliser are proportionally added in another reaction kettle and mixed, is controlled
The speed of agitator of the reaction kettle is 130~140r/min, and it is 60 DEG C to control the temperature in the reaction kettle；Stir 45min
Foaming agent is added in the reaction kettle afterwards to continue to stir 30min；
By the component A and the B component A in proportion：B=100:70~80 pour into inhalator jar, and polyurethane hair is made
Infusion.
The beneficial effects of the invention are as follows：Polyurethane foams of the present invention and preparation method thereof is by controlling component A, B groups
The raw material when reaction condition of each raw material, effectively improves the antioxygen rate and curing rate of polyurethane foams, simultaneously in point
The use hardness for improving polyurethane foams of the present invention effectively improves the polyurethane foams scope of application of the present invention.
Specific implementation mode
The present invention provides a kind of polyurethane foams, the polyurethane foams includes that mass ratio is A：B=100:70
~80 component A and B component, the component A are made of following raw material (mass percent)：
The B component is made of following raw material (mass percent)：
Isocyanates 75~90%
Foaming agent 45~55%
Foam stabiliser 5~10%.
To make the objectives, technical solutions, and advantages of the present invention clearer, with reference to specific embodiment to the present invention
It is described in detail.
Embodiment 1
The component A is (being calculated in mass percent)：
Polyether polyol 65%
Polyester polyol 17%
Catalyst 20%
Surfactant 5%
Fire retardant 4%；
Chain extender 1.2%
Crosslinking agent 0.8%
Foam stabiliser 15%；
Wherein, the polyether polyol is using glycerine as initiator, and number-average molecular weight is 4500~5000, and uses epoxy
The polypropylene oxide trihydroxylic alcohol of propane sealing end；The polyester polyol is that the aromatic polyester that number-average molecular weight is 4600 is polynary
Alcohol.The foaming agent is dimethyl ether；The catalyst is triethanolamine and bis- (2- dimethylaminoethyls) ethers, the triethanolamine
Mass percent with bis- (2- dimethylaminoethyls) ethers is 7:3；The surfactant is that mass ratio is 3:7 poly methyl
The castor-oil plant sodium alkoxide of siloxanes and sulfonation；The fire retardant is tributyl phosphate；The chain extender is 2- imidazolidinones；The friendship
Connection agent is glycerine.
The B component is (being calculated in mass percent)：
Isocyanates 80%
Foaming agent 50%
Foam stabiliser 7%.
Wherein, the isocyanates is toluene di-isocyanate(TDI) and pure MDI according to 6:The mixture of 4 mixing；The hair
Infusion is trichorotrifluoroethane；The foam stabiliser is organic foam stabilizer.
In the present embodiment, it is number-average molecular weight, same time control by controlling property and the polyester polyol of polyether polyol
The mass ratio of each component in catalyst and surfactant processed so that the component A prepared in the present embodiment is mixed with B component
Polyurethane foams have preferable ageing resistance, effectively improve the service life of polyurethane foams in the present embodiment.
Embodiment 2
The component A is (being calculated in mass percent)：
Polyether polyol 75%
Polyester polyol 30%
Catalyst 10%
Surfactant 6%
Fire retardant 4.5%；
Chain extender 1.2%
Crosslinking agent 1.5%
Foam stabiliser 22%；
Wherein, the polyether polyol is using glycerine as initiator, and number-average molecular weight is 4500~5000, and uses epoxy
The polypropylene oxide trihydroxylic alcohol of propane sealing end；The polyester polyol is the aromatic polyester that number-average molecular weight is 4500~5000
Polyalcohol.The foaming agent is 1,1,2,2 ,-tetrafluoroethane；Bis- (2- dimethylaminoethyls) ethers of catalyst；The surface
Activating agent is that mass ratio is 6:4 poly methylsiloxane and the castor-oil plant sodium alkoxide of sulfonation；The fire retardant is tributyl phosphate；
The chain extender is 2- imidazolidinones；The crosslinking agent is glycerine.
The B component is (being calculated in mass percent)：
Isocyanates 75%
Foaming agent 40%
Foam stabiliser 12%.
Wherein, it is 5 that the isocyanates, which is mass ratio,:5 pure MDI and Carbodiimide-Modified MDI；The foaming agent is
Dicholorodifluoromethane；The foam stabiliser is organic foam stabilizer.
In the present embodiment, by control in isocyanates the ratio of each component and the type of chain extender and crosslinking agent and
Usage amount so that the component A prepared in the present embodiment has preferable anti-aging with the polyurethane foams that B component is mixed with
Property simultaneously, have higher hardness.
Embodiment 3
The component A is (being calculated in mass percent)：
Wherein, the polyether polyol be using glycerine as initiator, number-average molecular weight be 6500 ± 100, and with aoxidize second
The polypropylene oxide trihydroxylic alcohol of alkene sealing end；The foaming agent is dimethyl ether；The catalyst be N-ethylmorpholine and NMM, it is described
The mass percent of N-ethylmorpholine and the NMM are 6:4；The surfactant is that mass ratio is 5:5 poly methyl silicon
The mass percent of the castor-oil plant sodium alkoxide of oxygen alkane and sulfonation, the poly methylsiloxane and the propylene oxide is 4:6；It is described
Fire retardant is that chain extender described in tricresyl phosphate-diphenyl ester is 2- imidazolidinones；The crosslinking agent is glycerine.
The B component is (being calculated in mass percent)：
Isocyanates 90%
Foaming agent 42%
Foam stabiliser 11%.
Wherein, it is 7 that the isocyanates, which is mass ratio,:The mixture of 3 Carbodiimide-Modified MDI and MDI-50；Institute
It is DMFA to state foaming agent；The foam stabiliser is organic foam stabilizer.
In the present embodiment, by controlling castor-oil plant sodium alkoxide and poly first in component A preparation process by choosing sulfonation
Radical siloxane controls the number-average molecular weight of polyether polyol in component A as mixed surfactant so that the present embodiment
The component A of middle preparation has preferable ageing resistance simultaneously with the polyurethane foams that B component is mixed with, and has higher make
Use intensity.
Table 1 gives the performance indicator for the polyurethane foams that combination according to the ... of the embodiment of the present invention obtains, with existing skill
Polyurethane foams in art ensure that polyurethane is sent out compared to the inoxidizability of polyurethane foams of the invention and using hardness
The practicability of infusion.
Table 1 is the performance indicator that Examples 1 to 3 prepares gained polyurethane foams.
| Detection project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Density (kg/m3) | 62 | 64 | 59 |
| Antioxygen rate (%) | 70 | 66 | 76 |
| Indentation force deflection (N) | 190 | 210 | 197 |
| Tensile strength (Kpa) | 0.4 | 0.5 | 0.46 |
| Tearing strength (kN/m) | 0.44 | 0.25 | 0.3 |
| Elongation (%) | 100 | 97 | 105 |
| Appearance | It is smooth, no peeling | It is more smooth, no peeling | It is smooth, no peeling |
1 Examples 1 to 3 of table prepares the performance indicator of gained polyurethane foams
Embodiment 4
For above-described embodiment 1-3, the present invention is respectively to after completing component A and being mixed with B component, being further added by and increasing separately
Component C：Borax is put into according to proportioning in reaction kettle with polyvinyl alcohol and is mixed, the component A, B component, component C
After preparation, according to (A+B：C)=80:1 mass ratio respectively pours into component A, B component, component C in inhalator jar, double groups
Part polyurethane foams preparation terminates.
Specifically, on the basis of above-described embodiment 1,0.5 borax and 0.5 polyvinyl alcohol is added；
Specifically, on the basis of above-described embodiment 2,0.8% borax and 1.0% polyvinyl alcohol is added；
Specifically, on the basis of above-described embodiment 3,1.0% borax and 2.0% polyvinyl alcohol is added.
By detect dual-component polyurethane foaming agent use experiment effect, comparison be added component C foaming agent with it is existing
The fitting power of product after to the foaming agent use in wooden, metal door and window, is added the foaming agent of component C and not had by test
Have to be added and be compared using the foaming agent that component C is added, the fitting power that the product of the foaming agent of component C is added improves 40%-65%.
By component C, increase the fitting power using product.
The present invention also provides a kind of preparation methods of polyurethane foams, include the following steps：
Component A is made, by polyether polyol, polyester polyol, catalyst, surfactant, fire retardant, chain extender and friendship
Connection agent, which is transferred in reaction kettle, stirs 60min, and the speed of agitator of the reaction kettle is 250~270r/min, and controls described anti-
It is 40 DEG C to answer the temperature in kettle；Foaming agent is added after stirring 60min in the reaction kettle to continue to stir 30min；
B component is made, isocyanates, foam stabiliser are proportionally added in another reaction kettle and mixed, is controlled
The speed of agitator of the reaction kettle is 130~140r/min, and it is 60 DEG C to control the temperature in the reaction kettle；Stir 45min
Foaming agent is added in the reaction kettle afterwards to continue to stir 30min；
By the component A and the B component A in proportion：B=100:70~80 pour into inhalator jar, and polyurethane hair is made
Infusion.
The preparation method of the polyurethane foams of the present invention is by controlling the parameter in polyurethane foams preparation process, side
The polyurethane foams preparation.
After completing component A and being mixed with B component, it is further added by and increases separately component C：By borax and polyvinyl alcohol according to proportioning
It is put into reaction kettle and is mixed, after prepared by the component A, B component, component C, according to (A+B)：C=80:1
Mass ratio respectively pours into component A, B component, component C in inhalator jar.
The above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although with reference to preferred embodiment to this hair
It is bright to be described in detail, it will be understood by those of ordinary skill in the art that, can modify to technical scheme of the present invention or
Person's equivalent replacement, without departing from the spirit of the technical scheme of the invention and range.
Claims (8)
1. a kind of polyurethane foams, it is characterised in that：The polyurethane foams includes that mass ratio is A：B=100:70~80
Component A and B component, the component A is made of following raw material (mass percent)：
The B component is made of following raw material (mass percent)：
Isocyanates 75~90%
Foaming agent 45~55%
Foam stabiliser 5~10%.
2. the polyurethane foams according to claim, it is characterised in that：The polyether polyol is to be with glycerine
Beginning agent, number-average molecular weight is 4500~5000, and the polypropylene oxide trihydroxylic alcohol blocked with propylene oxide.
3. polyurethane foams according to claim 1, it is characterised in that：The polyester polyol is that number-average molecular weight is
4500~5000 aromatic polyester polyol.
4. polyurethane foams according to claim 1, it is characterised in that：The isocyanates is toluene diisocynate
Ester, pure MDI, Carbodiimide-Modified MDI and MDI-50 at least two are mixed.
5. polyurethane foams according to claim 1, it is characterised in that：The catalyst is dimethyl cyclohexyl amine, two
Any one or more combination in methylbenzylamine, triethylamine, pyridine.
6. polyurethane foams according to claim 1, it is characterised in that：The surfactant is more methyl polysilicones
The castor-oil plant sodium alkoxide of alkane and sulfonation.
7. polyurethane foams according to claim 1, which is characterized in that the polyurethane foams also include 0.5~
1% borax and 0.5~2% polyvinyl alcohol.
8. a kind of preparation method of polyurethane foams, it is characterised in that include the following steps：
Component A is made, by polyether polyol, polyester polyol, catalyst, surfactant, fire retardant, chain extender and crosslinking agent
It is transferred in reaction kettle and stirs 60min, the speed of agitator of the reaction kettle is 250~270r/min, and controls the reaction kettle
Interior temperature is 40 DEG C；Foaming agent is added after stirring 60min in the reaction kettle to continue to stir 30min；
B component is made, isocyanates, foam stabiliser are proportionally added in another reaction kettle and mixed, described in control
The speed of agitator of reaction kettle is 130~140r/min, and it is 60 DEG C to control the temperature in the reaction kettle；Institute after stirring 45min
Addition foaming agent in reaction kettle is stated to continue to stir 30min；
By the component A and the B component A in proportion：B=100:70~80 pour into inhalator jar, and polyurethane foams is made.
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| CN201810453972.4A CN108559059A (en) | 2018-05-14 | 2018-05-14 | Polyurethane foams and preparation method thereof |
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| CN201810453972.4A CN108559059A (en) | 2018-05-14 | 2018-05-14 | Polyurethane foams and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111214990A (en) * | 2020-02-28 | 2020-06-02 | 李亚 | Polyurethane foaming agent preparation foaming process |
| CN111533867A (en) * | 2020-05-26 | 2020-08-14 | 中电保力（北京）科技有限公司 | Polyurethane gel foam and preparation method thereof |
| CN111826115A (en) * | 2020-07-20 | 2020-10-27 | 山东鑫合利电力科技有限公司 | Environment-friendly fireproof and moistureproof material and preparation method thereof |
| CN114031738A (en) * | 2021-11-25 | 2022-02-11 | 杭州每步材料科技有限公司 | Polyurethane grouting material capable of repeatedly expanding in water and preparation method thereof |
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|---|---|---|---|---|
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| CN111533867A (en) * | 2020-05-26 | 2020-08-14 | 中电保力（北京）科技有限公司 | Polyurethane gel foam and preparation method thereof |
| CN111826115A (en) * | 2020-07-20 | 2020-10-27 | 山东鑫合利电力科技有限公司 | Environment-friendly fireproof and moistureproof material and preparation method thereof |
| CN114031738A (en) * | 2021-11-25 | 2022-02-11 | 杭州每步材料科技有限公司 | Polyurethane grouting material capable of repeatedly expanding in water and preparation method thereof |
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