CN109734862A - Utilize the method for modified isocyanate and combinations thereof production hard polyurethane foam - Google Patents
Utilize the method for modified isocyanate and combinations thereof production hard polyurethane foam Download PDFInfo
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- CN109734862A CN109734862A CN201811644774.2A CN201811644774A CN109734862A CN 109734862 A CN109734862 A CN 109734862A CN 201811644774 A CN201811644774 A CN 201811644774A CN 109734862 A CN109734862 A CN 109734862A
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- polyurethane foam
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- hard polyurethane
- modified isocyanate
- foam
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Abstract
The present invention relates to polyurethane foam technology fields; more particularly to the method using modified isocyanate and combinations thereof production hard polyurethane foam; solve the disadvantage that spray polyurethane foam existing in the prior art easily fires; the following steps are included: S1: isocyanates and polyether polyatomic alcohol component being added in reaction kettle, is protected in kettle full of inert gas；S2: adding quantitative catalyst in stirred tank, and quantitative fire retardant is then added in stirring, stirs, for use；S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；S5: injecting in mold immediately when a large amount of foams occur, and demoulds to get polyurethane rigid foam plastic, process prepared by the present invention is reliable and stable, and adds fire retardant, reduces the security risk of hard polyurethane foam in use, the process of preparation is simple and convenient reliable simultaneously, easy to spread.
Description
Technical field
The present invention relates to polyurethane foam technology fields, more particularly to poly- using modified isocyanate and combinations thereof production
The method of urethane rigid foam.
Background technique
Spray polyurethane foam is a kind of novel synthetic material with heat preservation with water-proof function, and thermal coefficient is low, only
0.022~0.033W/ (m*K), is equivalent to the half of extruded sheet, is that thermal coefficient is minimum in current all thermal insulation materials, firmly
Matter polyurethane foam plastics is mainly used in exterior walls of buildings heat preservation, and waterproofing and thermal insulation of roofing is integrated, heat preservation of refrigeration storage is heat-insulated, pipeline
Thermal insulation material, building board, refrigerator car and the heat-insulated material of freezer etc..
Spray polyurethane foam itself has pole inflammability, is to lead to one of the arch-criminal of all kinds of fire disasters, therefore to poly-
The flammable processing of urethane hard bubble body is extremely urgent.
Therefore, it is used for we have proposed the method using modified isocyanate and combinations thereof production hard polyurethane foam
It solves the above problems.
Summary of the invention
The shortcomings that easily being fired the purpose of the present invention is to solve spray polyurethane foam existing in the prior art, and propose
Using modified isocyanate and combinations thereof production hard polyurethane foam method.
To achieve the goals above, present invention employs following technical solutions:
Method proposed by the present invention using modified isocyanate and combinations thereof production hard polyurethane foam, including with
Lower step:
S1: quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle, is full of in kettle lazy
Property gas is protected, and is warming up to 20-30 DEG C, 40-60min is sufficiently stirred；
S2: adding quantitative catalyst in stirred tank, and 10-15min is stirred under conditions of 30-45 DEG C, is then added
Quantitative fire retardant stirs 2-3h, for use under conditions of 50-65 DEG C；
S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；
S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；
S5: injecting in mold immediately when a large amount of foams occur, and 2-3h is cured at 50-65 DEG C, demoulds to get polyurethane
Rigid foam.
Preferably, the mass fraction of each component in preparation are as follows: 3-5 parts of polyether polyatomic alcohol component, catalyst 0.3-0.8
Part, 1-2 parts of fire retardant, 0.5-1 parts of foam stabiliser.
Preferably, the polyether polyatomic alcohol component includes polyether polyol A, polyether polyol B and polyether polyol C, and
The hydroxyl value of polyether polyol A is 450-500mgKOH/g, and the hydroxyl value of polyether polyol B is 320-440mgKOH/g, polyether polyols
The hydroxyl value of alcohol C is 360-430mgKOH/g.
Preferably, the catalyst is one of dimethyl benzylamine and glycinate, and the foam stabiliser is specially
Silicone oil L6900.
Preferably, the fire retardant is phosphate, ammonium polyphosphate, melamine phosphate compound, melamine cyanurea
One of hydrochlorate and hypophosphites are a variety of.
Preferably, in the S1, quantitative isocyanates and polyether polyol group are added in drying, clean reaction kettle
Point, it is protected in kettle full of inert gas, is warming up to 25 DEG C, 45min is sufficiently stirred.
Preferably, in the S2, quantitative catalyst is added in stirred tank, and 12min is stirred under conditions of 35 DEG C, and
Quantitative fire retardant is added afterwards, 2.5h is stirred under conditions of 55 DEG C, for use.
Preferably, it in the S5, is injected in mold immediately when a large amount of foams occur, 2.5h is cured at 55 DEG C, demoulded,
Up to polyurethane rigid foam plastic.
Compared with prior art, the beneficial effects of the present invention are:
1, the present invention is added with fire retardant during producing hard polyurethane foam, utilizes the reduction of fire retardant as far as possible
The combustibility of hard polyurethane foam, and then reduce the existing security risk of hard polyurethane foam in use.
2, the present invention during the preparation process, is added with catalyst, inert gas shielding and foam stabiliser, and each step is steady
Fixed reliable distribution carries out, so that the good stability of final hard polyurethane foam obtained, improves final product quality.
In conclusion process prepared by the present invention is reliable and stable, and adds fire retardant, reducing hard polyurethane foam makes
With security risk in the process, while the process prepared is simple and convenient reliable, easy to spread.
Specific embodiment
Unless otherwise defined, all technologies used herein and scientific term have and the common skill of fields of the present invention
The normally understood identical meaning of art personnel.When there is a conflict, the definition in this specification shall prevail." quality, concentration, temperature
What degree, time or other values or parameter were limited with range, preferred scope or a series of upper limit preferred values and lower preferable values
When Range Representation, this be should be understood as specifically disclosing by any range limit or preferred value and any range lower limit or preferably
Any pairing of value is formed by all ranges, regardless of whether the range separately discloses.For example, the range of 1-50 should be understood that
Be include selected from 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,
26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49 or 50
Any number, number combinatorics on words or subrange and all fractional values between above-mentioned integer, for example, 1.1,1.2,
1.3,1.4,1.5,1.6,1.7,1.8 and 1.9.It is specific to consider the extension since any endpoint in range about subrange
" nested subrange ".For example, the nested subrange of exemplary range 1-50 may include 1-10,1-20 on a direction,
1-30 and 1-40, or 50-40,50-30,50-20 and 50-10 in another direction."
Combined with specific embodiments below the present invention is made further to explain.
Embodiment one
Method proposed by the present invention using modified isocyanate and combinations thereof production hard polyurethane foam, including with
Lower step:
S1: quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle, is full of in kettle lazy
Property gas is protected, and is warming up to 20 DEG C, 40min is sufficiently stirred；
S2: adding quantitative catalyst in stirred tank, and 10min is stirred under conditions of 30 DEG C, then adds quantitative
Fire retardant stirs 2h, for use under conditions of 50 DEG C；
S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；
S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；
S5: injecting in mold immediately when a large amount of foams occur, and 2h is cured at 50 DEG C, demoulds to get rigid poly urethanes
Foamed plastics.
Further, catalyst is dimethyl benzylamine, and foam stabiliser is specially silicone oil L6900, and fire retardant is phosphate.
Embodiment two
Method proposed by the present invention using modified isocyanate and combinations thereof production hard polyurethane foam, including with
Lower step:
S1: quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle, is full of in kettle lazy
Property gas is protected, and is warming up to 24 DEG C, 50min is sufficiently stirred；
S2: adding quantitative catalyst in stirred tank, and 12min is stirred under conditions of 35 DEG C, then adds quantitative
Fire retardant stirs 2h, for use under conditions of 55 DEG C；
S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；
S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；
S5: injecting in mold immediately when a large amount of foams occur, and 2h is cured at 55 DEG C, demoulds to get rigid poly urethanes
Foamed plastics.
Further, catalyst is dimethyl benzylamine, and foam stabiliser is specially silicone oil L6900, and fire retardant is hypophosphorous acid
Salt.
Embodiment three
Method proposed by the present invention using modified isocyanate and combinations thereof production hard polyurethane foam, including with
Lower step:
S1: quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle, is full of in kettle lazy
Property gas is protected, and is warming up to 28 DEG C, 50min is sufficiently stirred；
S2: adding quantitative catalyst in stirred tank, and 15min is stirred under conditions of 40 DEG C, then adds quantitative
Fire retardant stirs 2.5h, for use under conditions of 60 DEG C；
S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；
S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；
S5: injecting in mold immediately when a large amount of foams occur, and 2.5h is cured at 60 DEG C, demoulds to get rigid polyurethane
Matter foamed plastics.
Further, catalyst is glycinate, and foam stabiliser is specially silicone oil L6900, and fire retardant is melamine
Phosphate compound.
Example IV
Method proposed by the present invention using modified isocyanate and combinations thereof production hard polyurethane foam, including with
Lower step:
S1: quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle, is full of in kettle lazy
Property gas is protected, and is warming up to 30 DEG C, 60min is sufficiently stirred；
S2: adding quantitative catalyst in stirred tank, and 15min is stirred under conditions of 45 DEG C, then adds quantitative
Fire retardant stirs 3h, for use under conditions of 65 DEG C；
S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；
S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；
S5: injecting in mold immediately when a large amount of foams occur, and 3h is cured at 65 DEG C, demoulds to get rigid poly urethanes
Foamed plastics.
Further, catalyst is glycinate, and foam stabiliser is specially silicone oil L6900, and fire retardant is melamine
Cyanurate.
The hard polyurethane foam prepared to above-described embodiment one to example IV detects, as a result as follows:
The present invention is added with fire retardant during producing hard polyurethane foam, utilizes fire retardant reducing as far as possible
The combustibility of hard polyurethane foam, and then the existing security risk of hard polyurethane foam in use is reduced,
In preparation process, it is added with catalyst, inert gas shielding and foam stabiliser, and the distribution progress that each step is reliable and stable,
So that the good stability of final hard polyurethane foam obtained, improves final product quality.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (8)
1. the method for producing hard polyurethane foam using modified isocyanate and combinations thereof, which is characterized in that including following
Step:
S1: quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle, is full of indifferent gas in kettle
Body is protected, and is warming up to 20-30 DEG C, and 40-60min is sufficiently stirred；
S2: adding quantitative catalyst in stirred tank, and 10-15min is stirred under conditions of 30-45 DEG C, and then addition is quantitative
Fire retardant, 2-3h is stirred under conditions of 50-65 DEG C, for use；
S3: reaction solution obtained above is evaporated under reduced pressure, and recycles organic solvent, obtains retaining liquid；
S4: foam stabiliser, high-speed stirred to foaming are added in retention liquid obtained above；
S5: injecting in mold immediately when a large amount of foams occur, and 2-3h is cured at 50-65 DEG C, demoulds to get rigid poly urethanes
Foamed plastics.
2. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, the mass fraction of each component in preparation are as follows: 3-5 parts of polyether polyatomic alcohol component, 0.3-0.8 parts of catalyst, resistance
Agent 1-2 parts, 0.5-1 parts of foam stabiliser of combustion.
3. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, the polyether polyatomic alcohol component includes polyether polyol A, polyether polyol B and polyether polyol C, and polyethers
The hydroxyl value of polyalcohol A is 450-500mgKOH/g, and the hydroxyl value of polyether polyol B is 320-440mgKOH/g, polyether polyol C's
Hydroxyl value is 360-430mgKOH/g.
4. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, the catalyst is one of dimethyl benzylamine and glycinate, the foam stabiliser is specially silicone oil
L6900。
5. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, the fire retardant is phosphate, ammonium polyphosphate, melamine phosphate compound, melamine cyanurate
With one of hypophosphites or a variety of.
6. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, quantitative isocyanates and polyether polyatomic alcohol component are added in drying, clean reaction kettle in the S1,
It is protected in kettle full of inert gas, is warming up to 25 DEG C, 45min is sufficiently stirred.
7. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, adding quantitative catalyst in stirred tank in the S2,12min is stirred under conditions of 35 DEG C, is then added
The fire retardant for the amount of reordering stirs 2.5h, for use under conditions of 55 DEG C.
8. the method according to claim 1 using modified isocyanate and combinations thereof production hard polyurethane foam,
It is characterized in that, inject in mold immediately when a large amount of foams occur in the S5, cure 2.5h at 55 DEG C, demoulding to get
Polyurethane rigid foam plastic.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811644774.2A CN109734862A (en) | 2018-12-29 | 2018-12-29 | Utilize the method for modified isocyanate and combinations thereof production hard polyurethane foam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811644774.2A CN109734862A (en) | 2018-12-29 | 2018-12-29 | Utilize the method for modified isocyanate and combinations thereof production hard polyurethane foam |
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| CN109734862A true CN109734862A (en) | 2019-05-10 |
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Citations (6)
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|---|---|---|---|---|
| CN103467704A (en) * | 2013-09-26 | 2013-12-25 | 南京年吉冷冻食品有限公司 | Preparation method of polyurethane hard foamed plastic with high weather ability |
| CN103483546A (en) * | 2013-09-26 | 2014-01-01 | 南京年吉冷冻食品有限公司 | Preparation method for water-repellent oil-repellent fluorinated polyurethane rigid foamed plastic |
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| CN103755914A (en) * | 2013-12-20 | 2014-04-30 | 苏州市万泰真空炉研究所有限公司 | Preparation method of light-stable polyurethane hard foamed plastic |
| CN104163908A (en) * | 2014-08-06 | 2014-11-26 | 蒋鹏 | Preparation method of high-weather-resistant hard foamed insulation material |
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2018
- 2018-12-29 CN CN201811644774.2A patent/CN109734862A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103467704A (en) * | 2013-09-26 | 2013-12-25 | 南京年吉冷冻食品有限公司 | Preparation method of polyurethane hard foamed plastic with high weather ability |
| CN103483546A (en) * | 2013-09-26 | 2014-01-01 | 南京年吉冷冻食品有限公司 | Preparation method for water-repellent oil-repellent fluorinated polyurethane rigid foamed plastic |
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