CN109111561A - A kind of eleostearic acid based polyurethanes sound-absorbing material and preparation method thereof - Google Patents
A kind of eleostearic acid based polyurethanes sound-absorbing material and preparation method thereof Download PDFInfo
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- CN109111561A CN109111561A CN201810973451.1A CN201810973451A CN109111561A CN 109111561 A CN109111561 A CN 109111561A CN 201810973451 A CN201810973451 A CN 201810973451A CN 109111561 A CN109111561 A CN 109111561A
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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
- C08G18/65—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
- C08G18/6696—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/36 or hydroxylated esters of higher fatty acids of C08G18/38
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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
- C08G18/30—Low-molecular-weight compounds
- C08G18/36—Hydroxylated esters of higher fatty acids
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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
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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
- C08G18/65—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
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- C—CHEMISTRY; METALLURGY
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- 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
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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
- C08G2350/00—Acoustic or vibration damping material
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Abstract
The invention discloses a kind of preparation methods of eleostearic acid based polyurethanes sound-absorbing material, it include: Step 1: eleostearic acid polyalcohol, polyether polyol, foaming agent, chain extender, the first catalyst, the second catalyst and foam stabiliser are added sequentially in dixie cup, standing；Step 2: being stirred with the first revolving speed, later, with the stirring of the second revolving speed, the first mixture is obtained, is stood later；Mold is placed in insulating box simultaneously and is preheated；Step 3: isocyanates is added into the first mixture after standing, later, with the stirring of third revolving speed, the second mixture is obtained；Step 4: the second mixture is poured into mold, mixture is paved in a mold, object to be mixed fills up mold rear cover upper mold lid and carries out foaming inclosed molds；Later, the mold equipped with foaming mixture is put into after solidifying in insulating box, is placed on and solidifies at room temperature；Step 5: the material being cured is removed from the molds, surface skining is removed, eleostearic acid based polyurethanes sound-absorbing material is obtained.
Description
Technical field
The invention belongs to acoustics field of packaging material, in particular to a kind of eleostearic acid based polyurethanes sound-absorbing material and its
Preparation method.
Background technique
In recent years, with the continuous development of society, total vehicle is being continuously increased, and people want in terms of car comfort
Ask also higher and higher.Automobile noise can be effectively reduced using the acoustics packaging of automobile, promote the comfort of automobile.Polyurethane is inhaled
Interior various noises can be effectively reduced as a kind of novel car acpistocs packaging in sound material, are widely used on automobile.
Currently, the raw material of the polyurethane sound absorption material used on automobile is extracted from petroleum, although having
Relatively good high frequency sound absorption effect, but the sound absorption effect of its low frequency is poor, it is big to the pollution of environment, and petroleum is that one kind can not
Regenerated resource.It is some using vegetable oil be raw material production environmental-friendly type polyurethane also just with its mechanical performance, and
It is unable to satisfy the acoustical behavior demand as sound-absorbing material.Tung oil is the important raw material of industry in China, can be eaily
It is obtained from tung oil tree.Therefore, in the case where guaranteeing acoustical behavior, a kind of polyurethane sound absorption material synthesized using tung oil is designed
Material, can satisfy the demand of acoustics packaging material, reduces the use of petroleum material, preferably protect environment.
Summary of the invention
An object of the present invention is to provide a kind of eleostearic acid based polyurethanes sound-absorbing material, relative to the poly- ammonia of general chemical base
Ester, this material have better low frequency absorption performance.
The second object of the present invention is to provide a kind of preparation method of eleostearic acid based polyurethanes sound-absorbing material, tung oil is used
Sour polyalcohol is primary raw material, partially substitutes traditional fossil material, easily decomposes processing is more energy-saving and environmentally friendly.
Technical solution provided by the invention are as follows:
A kind of preparation method of eleostearic acid based polyurethanes sound-absorbing material, comprising:
Step 1: according to mass fraction, by 40~50 parts of eleostearic acid polyalcohols, 50~60 parts of polyether polyol, 2~3 parts
Foaming agent, 3~4 parts of chain extenders, 0.05~0.2 part of first catalyst, 1~2 part of second catalyst and 2~2.5 parts of foams are stablized
Agent is added sequentially in dixie cup, is stood；
Step 2:, with the stirring of the second revolving speed, obtaining first after being stirred to the substance in the dixie cup with the first revolving speed
Mixture is stood；Mold is placed in insulating box simultaneously and is preheated；
Step 3: according to mass fraction, after 35~45 parts of isocyanates are added into the first mixture after standing, with the
The stirring of three revolving speeds, obtains the second mixture；
Step 4: second mixture is poured into mold, and pave, is filled out to second mixture in a mold
Full mold rear cover upper mold lid carries out foaming inclosed molds；Mold equipped with foaming mixture is put into after solidifying in insulating box, is placed on
Solidify at room temperature；
Step 5: the material being cured is removed from the molds, surface skining is removed, obtains the sound absorption of eleostearic acid based polyurethanes
Material.
Preferably, in said step 1, the foaming agent is deionized water, and the chain extender is triethanolamine, institute
Stating foam stabiliser is silicone oil.
Preferably, first catalyst is N, and N- dimethyl ethyl ether, second catalyst is that mass fraction is
33% triethylene diamine solution.
Preferably, in the step 2, first revolving speed is 1500rpm, and second revolving speed is 1000rpm.
Preferably, the preheating temperature of the insulating box is 50~60 DEG C.
Preferably, in the step 3, the third rotary speed is 1000rpm.
Preferably, in the step 4, after solidifying 2 hours in insulating box, solidify 24 hours at room temperature.
Preferably, in said step 1, eleostearic acid polyalcohol, polyether polyol, foaming agent, chain extender, first are urged
The mass parts ratio of agent, the second catalyst and foam stabiliser is 40:60:2:3.8:0.05:2:2.
Preferably, in the step 3, according to mass fraction, into the first mixture after standing, 40 parts of addition is different
Cyanate.
A kind of eleostearic acid based polyurethanes sound-absorbing material uses the preparation method of the eleostearic acid based polyurethanes sound-absorbing material
It is prepared.
The beneficial effects of the present invention are:
1, eleostearic acid based polyurethanes sound-absorbing material provided by the invention, acoustic absorptivity when low frequency between 0.1 to 0.6,
Average sound absorption coefficient can achieve 0.55, and acoustical behavior is better than traditional polyurethane foam.
2, eleostearic acid based polyurethanes sound-absorbing material provided by the invention is for pure petroleum polyurethane, Mechanics of Machinery
Performance is more preferable and has smaller smell.
3, the preparation method of eleostearic acid based polyurethanes sound-absorbing material provided by the invention is using eleostearic acid polyalcohol as reaction
Object, partially substitutes traditional fossil material, and easily decomposes processing is more energy-saving and environmentally friendly.
Detailed description of the invention
Fig. 1 is the flow diagram of the preparation method of eleostearic acid based polyurethanes sound-absorbing material of the present invention.
Fig. 2 is the acoustic absorptivity and frequency relation of the eleostearic acid based polyurethanes sound-absorbing material prepared in the embodiment of the present invention 1
Curve.
Fig. 3 is the acoustic absorptivity and frequency relation of the eleostearic acid based polyurethanes sound-absorbing material prepared in the embodiment of the present invention 2
Curve.
Fig. 4 is the acoustic absorptivity and frequency relation of the eleostearic acid based polyurethanes sound-absorbing material prepared in the embodiment of the present invention 3
Curve.
Fig. 5 is the acoustic absorptivity and frequency relation of the eleostearic acid based polyurethanes sound-absorbing material prepared in comparative example 1 of the present invention
Curve.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figure 1, the present invention provides a kind of preparation methods of eleostearic acid based polyurethanes sound-absorbing material, including walk as follows
It is rapid:
Step 1: according to mass fraction, by 40~50 parts of eleostearic acid polyalcohol, 50~60 parts of polyether polyol, 2~3
Part foaming agent, 3~4 parts of chain extenders, 0.05~2 part of catalyst A1 (N, N- dimethyl ethyl ether), 1~2 part of catalyst A33 (matter
Amount score be 33% triethylene diamine solution), 2~2.5 parts of foam stabilisers be added sequentially in dixie cup in order, stand 3
Minute；
Wherein, the polyether polyol uses polyether polyol 3630, and foaming agent uses deionized water, and chain extender uses three
Ethanol amine, foam stabiliser use silicone oil.
Step 2: at room temperature with the blender of two panels leaf to be added dixie cup in substance be stirred, first with
1500rpm speed stirs 0.5~1 minute, is then stirred 0.5~1 minute with the speed of 1000rpm, obtains the first mixture, quiet
It sets 3~5 minutes；Square mold is placed in 50~60 DEG C of insulating box and is preheated simultaneously.
Step 3: 35~45 parts of isocyanates are quickly poured into the first mixing that step 2 obtains according to mass fraction
In object, the electric blender of two blades is then used to stir 5~10s with the speed of 1000rpm, obtains the second mixing of milk yellow
Object.
Step 4: the second mixture Quick uniform is poured into mold, and pave in a mold, allow its free growth,
Mold rear cover upper mold lid is filled up to the second mixture and carries out foaming inclosed molds, and the mould of foaming mixture will be housed after 2~3 minutes
Tool is put into preheated insulating box and solidifies 2~3 hours, then solidifies 24 hours at room temperature again.
Step 5: the material being cured is taken out, surface skining is removed, eleostearic acid based polyurethanes sound-absorbing material is obtained；Paulownia
Oleic acid based polyurethanes material can be processed to required various shape.
Wherein, the unit of the mass fraction be mass unit, can according to actual selection gram or kilogram.In step 1
In, selecting hydroxyl value is the eleostearic acid polyalcohol of 21~27mgKOH/g, and selecting hydroxyl value is the polyethers of 430~470mgKOH/g
Polyalcohol 3630.
The present invention also provides a kind of eleostearic acid based polyurethanes sound-absorbing materials, poly- using tung oil acidic group provided by the invention
It is prepared by the preparation method of urethane sound-absorbing material.
Embodiment 1
According to mass fraction, by 40 parts of eleostearic acid polyalcohols, 60 parts of polyether polyol, 3630,2 parts of foaming agent (deionizations
Water), 3.8 parts of chain extenders (triethanolamine), 0.05 part of catalyst A1,2 parts of catalyst A33,2 parts of foam stabilisers (silicone oil) are by suitable
Sequence is added sequentially in dixie cup, after standing 3 minutes, at room temperature with the blender of two panels leaf first with 1500rpm speed stirring 1
Minute, it is then stirred 1 minute with the speed of 1000rpm, obtains the first mixture, stand 3 minutes；Meanwhile by square mold
It is placed in 60 DEG C of insulating box and preheats.
According to mass fraction, 40 parts of isocyanates are quickly poured into the first mixture, then use the electricity of two blades
Dynamic blender stirs 10s with the speed of 1000rpm, obtains the second mixture of milk yellow.
Second mixture Quick uniform is poured into mold, the second mixture is paved in a mold, allows its free growth,
Mold rear cover upper mold lid is filled up to the second mixture and carries out foaming inclosed molds, and the mold of foaming mixture will be housed after 3 minutes, put
Enter to solidify in 60 DEG C of insulating boxs 2 hours, then solidify 24 hours at room temperature again.
The material being cured is taken out, surface skining is removed, material is processed into diameter 100, length 35mm；And diameter
For 28mm, length is two cylindrical bodies of 35mm, and two cylindrical bodies are carried out acoustical testing inside acoustic impedance pipe later.Such as figure
Shown in 2, the acoustic absorptivity of sound-absorbing material is obtained, test result is shown, acoustic absorptivity when polyurethane sound absorption material low frequency is 0.1
To between 0.7, average sound absorption coefficient can achieve 0.55, and acoustic absorptivity when high frequency can achieve 0.85, and acoustic absorptivity is higher,
It is better to represent sound absorption effect.And acoustic absorptivity when common pure petroleum base polyurethane sound absorption material low frequency is between 0.05-0.5,
Acoustic absorptivity of the average sound absorption coefficient at 0.5 or so, the present embodiment low frequency has large increase, also reduces petroleum-based feedstock
Use, illustrate that sound-absorbing material obtained may be used as automobile sound-absorbing material in the present embodiment.
Embodiment 2
According to mass fraction, by 50 parts of eleostearic acid polyalcohols, 50 parts of polyether polyol, 3630,2 parts of foaming agent (deionizations
Water), 3 parts of chain extenders (triethanolamine), 0.2 part of catalyst A1,1 part of catalyst A33,2 parts of foam stabilisers (silicone oil) in order
It is added sequentially in dixie cup, after standing 3 minutes, stirs 1 point first with the blender of two panels leaf at room temperature with 1500rpm speed
Then clock is stirred 0.5 minute with the speed of 1000rpm, obtain the first mixture, stands 4 minutes, square mold is placed on 60
DEG C insulating box in preheat.
According to mass fraction, 45 parts of isocyanates are quickly poured into the first mixture, then use the electricity of two blades
Dynamic blender stirs 10s with the speed of 1000rpm, obtains the second mixture of milk yellow.
Second mixture Quick uniform pours into mold, and the second mixture is paved in a mold, allows its free growth, to
Second mixture fills up mold rear cover upper mold lid and carries out foaming inclosed molds, and the mold of foaming mixture will be housed after 3 minutes, be put into
Solidify in 60 DEG C of insulating boxs 2.5 hours, then solidifies 24 hours at room temperature again.
The material being cured is taken out, surface skining is removed, material is processed into diameter 100, length 35mm；And diameter
For 28mm, length is two cylindrical bodies of 35mm, and two cylindrical bodies are carried out acoustical testing inside acoustic impedance pipe later.Such as figure
Shown in 3, the acoustic absorptivity of sound-absorbing material is obtained, test result is shown, acoustic absorptivity when polyurethane sound absorption material low frequency exists
Between 0.18 to 0.57, acoustic absorptivity when high frequency can be stablized 0.8, and average sound absorption coefficient can achieve 0.53.And it is common
Acoustic absorptivity when pure petroleum base polyurethane sound absorption material low frequency is between 0.05-0.5, and average sound absorption coefficient is 0.5 or so, originally
Acoustic absorptivity when embodiment low frequency has large increase, also reduces the use of petroleum-based feedstock, has good sound absorption effect
Fruit may be used as automobile sound-absorbing material.
Embodiment 3
According to mass fraction, by 40 parts of eleostearic acid polyalcohols, 60 parts of polyether polyol, 3630,2 parts of foaming agent deionized waters,
4 parts of chain extenders (triethanolamine), 0.05 part of catalyst A1,2 parts of catalyst A33,2.5 parts of foam stabilisers (silicone oil) in order according to
It is secondary to be added in dixie cup, after standing 3 minutes, 1 point is stirred with 1500rpm speed first with the blender of two panels leaf at room temperature
Then clock is stirred 1 minute with the speed of 1000rpm, obtain the first mixture, stands 3 minutes, square mold is placed on 60 DEG C
Insulating box in preheat.
According to mass fraction, 35 parts of isocyanates are quickly poured into the first mixture, then use the electricity of two blades
Dynamic blender stirs 10s with the speed of 1000rpm, obtains the second mixture of milk yellow.
Second mixture Quick uniform is poured into mold, the second mixture is paved in a mold, allows its free growth,
Mold rear cover upper mold lid is filled up to the second mixture and carries out foaming inclosed molds, and the mold of foaming mixture will be housed after 3 minutes, put
Enter to solidify in 60 DEG C of insulating boxs 2 hours, then solidify 24 hours at room temperature again.
The material being cured is taken out, surface skining is removed, material is processed into diameter 100, length 35mm；And diameter
For 28mm, length is two cylindrical bodies of 35mm, and two cylindrical bodies are carried out acoustical testing inside acoustic impedance pipe later.Such as figure
Shown in 4, the acoustic absorptivity of sound-absorbing material is obtained, test result is shown, acoustic absorptivity when polyurethane sound absorption material low frequency exists
Between 0.13 to 0.56, average sound absorption coefficient can achieve 0.52, and high frequency acoustic absorptivity is 0.8 or so.And common pure petroleum base
Acoustic absorptivity when polyurethane sound absorption material low frequency is between 0.05-0.5, and for average sound absorption coefficient 0.5 or so, the present embodiment is low
Acoustic absorptivity when frequency has large increase, also reduces the use of petroleum-based feedstock, has good sound absorption effect, Ke Yiyong
Make automobile sound-absorbing material.
Comparative example 1
According to mass fraction, by 30 parts of eleostearic acid polyalcohols, 70 parts of polyether polyol, 3630,4 parts of foaming agent (deionizations
Water), 3.8 parts of chain extenders (triethanolamine), 0.05 part of catalyst A1,1.5 parts of catalyst A33,2.5 parts of foam stabilisers (silicone oil)
It is added sequentially in dixie cup in order, after standing 3 minutes, at room temperature with the blender of two panels leaf first with 1500rpm speed
Then stirring 1 minute is stirred 1 minute with the speed of 1000rpm, obtain the first mixture, 3 minutes is stood, by square mold
It is placed in 60 DEG C of insulating box and preheats.
According to mass fraction, 40 parts of isocyanates are quickly poured into the first mixture, then use the electricity of two blades
Dynamic blender stirs 10s with the speed of 1000rpm, obtains the second mixture of milk yellow.
Second mixture Quick uniform is poured into mold, the second mixture is paved in a mold, allows its free growth,
Mold rear cover upper mold lid is filled up to the second mixture and carries out foaming inclosed molds, and the mold of foaming mixture will be housed after 3 minutes, put
Enter to solidify in 60 DEG C of insulating boxs 2 hours, then solidify 24 hours at room temperature again.
The material being cured is taken out, surface skining is removed, material is processed into diameter 100, length 35mm；And diameter
For 28mm, length is two cylindrical bodies of 35mm, and two cylindrical bodies are carried out acoustical testing inside acoustic impedance pipe later.Such as figure
Shown in 5, the acoustic absorptivity of sound-absorbing material is obtained, test result is shown, acoustic absorptivity when polyurethane sound absorption material low frequency is 0.1
To between 0.4, average sound absorption coefficient only has 0.42, and acoustic absorptivity when low frequency is lower, and is unsatisfactory for generally absorbing sound in engineering
Material average sound absorption coefficient is maintained at 0.5 or more requirement, is not suitable as sound-absorbing material.
Comparative example 2
According to mass fraction, by 40 parts of eleostearic acid polyalcohols, 60 parts of polyether polyol, 3630,2 parts of foaming agent (deionizations
Water), 4 parts of chain extenders (triethanolamine), 0.05 part of catalyst A1,1.5 parts of catalyst A33,1 part of foam stabiliser (silicone oil) is by suitable
Sequence is added sequentially in dixie cup, after standing 3 minutes, at room temperature with the blender of two panels leaf first with 1500rpm speed stirring 1
Minute, it is then stirred 1 minute with the speed of 1000rpm, obtains the first mixture, stood 3 minutes, square mold is placed on 60
DEG C insulating box in preheat.
According to mass fraction, 45 parts of isocyanates are quickly poured into the first mixture, then use the electricity of two blades
Dynamic blender stirs 10s with the speed of 1000rpm, obtains the second mixture of milk yellow.
Second mixture Quick uniform is poured into mold, the second mixture is paved in a mold, allows its free growth,
Mold rear cover upper mold lid is filled up to the second mixture and carries out foaming inclosed molds, and the mold of foaming mixture will be housed after 3 minutes, put
Enter to solidify in 60 DEG C of insulating boxs 2 hours, then solidify 24 hours at room temperature again.
The material being cured is taken out, removes surface skining, big crackle occurs in discovery material internal, and abscess is formed
Unevenly, it is unsuitable as sound-absorbing material.
Comparative example 3
According to mass fraction, by 40 parts of eleostearic acid polyalcohols, 60 parts of polyether polyol, 3630,2 parts of foaming agent (deionizations
Water), 3.8 parts of chain extenders (triethanolamine), 1 part of catalyst A1,2.5 parts of catalyst A33,2 parts of foam stabilisers (silicone oil) are by suitable
Sequence is added sequentially in dixie cup, after standing 3 minutes, at room temperature with the blender of two panels leaf first with 1500rpm speed stirring 1
Minute, it is then stirred 1 minute with the speed of 1000rpm, obtains the first mixture, stood 3 minutes, square mold is placed on 60
DEG C insulating box in preheat.
According to mass fraction, 40 parts of isocyanates are quickly poured into the first mixture, then use the electricity of two blades
Dynamic blender stirs 10s with the speed of 1000rpm, obtains the second mixture of milk yellow.
Second mixture Quick uniform is poured into mold, mixture is paved in a mold, allows its free growth, to mixed
It closes object and fills up mold rear cover upper mold lid progress foaming inclosed molds, the mold of foaming mixture will be housed after 3 minutes, be put into 60 DEG C of perseverances
Solidify in incubator 2 hours, then solidifies 24 hours at room temperature again.
The material being cured is taken out, surface skining is removed, discovery material heartburn phenomenon occurs, no due to reacting too fast
It is suitable as sound-absorbing material.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of preparation method of eleostearic acid based polyurethanes sound-absorbing material, which comprises the steps of:
Step 1: according to mass fraction, by 40~50 parts of eleostearic acid polyalcohols, 50~60 parts of polyether polyol, 2~3 parts of foaming
Agent, 3~4 parts of chain extenders, 0.05~0.2 part of first catalyst, 1~2 part of second catalyst and 2~2.5 parts of foam stabilisers according to
It is secondary to be added in dixie cup, it stands；
Step 2:, with the stirring of the second revolving speed, obtaining the first mixing after being stirred to the substance in the dixie cup with the first revolving speed
Object is stood；Mold is placed in insulating box simultaneously and is preheated；
Step 3: after 35~45 parts of isocyanates are added into the first mixture after standing, being turned according to mass fraction with third
Speed stirring, obtains the second mixture；
Step 4: second mixture is poured into mold, and pave in a mold, fills up mould to second mixture
Have rear cover upper mold lid and carries out foaming inclosed molds；Mold equipped with foaming mixture is put into after solidifying in insulating box, is placed on room temperature
Lower solidification；
Step 5: the material being cured is removed from the molds, surface skining is removed, obtains eleostearic acid based polyurethanes sound absorption material
Material.
2. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 1, which is characterized in that in the step
In rapid one, the foaming agent is deionized water, and the chain extender is triethanolamine, and the foam stabiliser is silicone oil.
3. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 2, which is characterized in that described first
Catalyst is N, and N- dimethyl ethyl ether, second catalyst is the triethylene diamine solution that mass fraction is 33%.
4. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 1 or 3, which is characterized in that in institute
It states in step 2, first revolving speed is 1500rpm, and second revolving speed is 1000rpm.
5. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 4, which is characterized in that the constant temperature
The preheating temperature of case is 50~60 DEG C.
6. according to the preparation method of eleostearic acid based polyurethanes sound-absorbing material described in claim 5 any one, which is characterized in that
In the step 3, the third rotary speed is 1000rpm.
7. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 6, which is characterized in that in the step
In rapid four, after solidifying 2 hours in insulating box, solidify 24 hours at room temperature.
8. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 7, which is characterized in that in the step
In rapid one, eleostearic acid polyalcohol, polyether polyol, foaming agent, chain extender, the first catalyst, the second catalyst and foam are stablized
The mass parts ratio of agent is 40:60:2:3.8:0.05:2:2.
9. the preparation method of eleostearic acid based polyurethanes sound-absorbing material according to claim 8, which is characterized in that in the step
In rapid three, according to mass fraction, 40 parts of isocyanates are added into the first mixture after standing.
10. a kind of eleostearic acid based polyurethanes sound-absorbing material, which is characterized in that using as described in any one of claim 1-9
The preparation method of eleostearic acid based polyurethanes sound-absorbing material prepared.
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