CN108084395A - A kind of low modulus silicane-modified polyurethane resin material and preparation method thereof - Google Patents
A kind of low modulus silicane-modified polyurethane resin material and preparation method thereof Download PDFInfo
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- CN108084395A CN108084395A CN201711440289.9A CN201711440289A CN108084395A CN 108084395 A CN108084395 A CN 108084395A CN 201711440289 A CN201711440289 A CN 201711440289A CN 108084395 A CN108084395 A CN 108084395A
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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
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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
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
-
- 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
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/288—Compounds containing at least one heteroatom other than oxygen or nitrogen
- C08G18/289—Compounds containing at least one heteroatom other than oxygen or nitrogen containing silicon
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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
- C08G18/4825—Polyethers containing two hydroxy groups
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
This application involves a kind of low modulus silicane-modified polyurethane resin materials.The application also provides a kind of method for preparing low modulus silicane-modified polyurethane resin material.In preparation method as described herein, specific polyether polyol is made to be reacted with isocyanates first, obtains base polyurethane prepolymer for use as；Then base polyurethane prepolymer for use as is made to be reacted with silane end-cappers, obtains low modulus silicane-modified polyurethane resin material.The advantageous effect of the application is under the low modulus silicane-modified polyurethane resin material room temperature of the application that viscosity is relatively low, colorless and odorless, and in the product for preparing low modulus silicane-modified polyurethane fluid sealant, excellent in stability meets moisture cure crosslinking, environment friendly and pollution-free.
Description
Technical field
This application involves fluid sealant technical fields.Specifically, this application involves a kind of low modulus silicane-modified polyurethanes
Resin material and preparation method thereof.
Background technology
Silicane-modified polyurethane resin material is mainly used in fluid sealant, and this fluid sealant has silicone sealant concurrently and gathers
The advantages of urethane fluid sealant and strong point, show excellent weatherability, durability, and good anti-deformational displacement ability is good
The advantages that caking property, covering with paint property, friendly property of environment, low staining, low-viscosity and excellent workability.Therefore, silane-modified poly- ammonia
Ester resin material has increasingly obtained the concern of domestic construction industry, and in industrial circle such as automobile making, track traffic, packaging
The fields such as case manufacture, device fabrication, electric are also just more and more being promoted the use.
Most of sealed product is all based on silicone adhesive and polyurethane adhesive, especially in China, silicone currently on the market
Glue captures the market of the overwhelming majority.Compared with silicone adhesive, this silane-modified resin material is prepared silane-modified close
Sealing product can brushing performance, be all significantly improved with substrate bonding performance, environment-friendly type etc..
Silicane-modified polyurethane resin mainly by after polyethers and isocyanates reaction again and the silane containing reactive group
Blocking agent reaction carries out end capping reaction by the design of polyether segment, the selection of isocyanates species and amount and silane, so as to
It can be designed that the product for meeting different application demand.
The principle of solidification of this resin mainly in the environment of certain temperature and humidity, the silane key of resinous terminal with
Steam reacts, and sloughs small molecule alcohol substance and reaches sealing function so as to fulfill certain cross-linked network structure.This silane changes
The property prepared silicane-modified polyurethane fluid sealant of polyurethane resin does not generate toxic and harmful gas under room temperature curing, is not precipitated
Oily substance, it is functional to substrate bonding.
Therefore, there is an urgent need in the art to develop a kind of low modulus silicane-modified polyurethane resin material and preparation method thereof.
The content of the invention
The application's is designed to provide a kind of low modulus silicane-modified polyurethane resin material, above-mentioned existing so as to solve
The technical issues of in technology.The purpose of the application, which also resides in provide, a kind of prepares low modulus silicane-modified polyurethane resin material
Method.In the method as described herein for preparing low modulus silicane-modified polyurethane resin material, make specific polyethers more first
First alcohol is reacted with isocyanates, obtains base polyurethane prepolymer for use as；Then base polyurethane prepolymer for use as is made to be reacted with silane end-cappers, is obtained low
Modulus silicane-modified polyurethane resin material.
The silicane-modified polyurethane resin material of the application is free of free isocyanate, environment friendly and pollution-free.The silicon of the application
The prepared silane-modified fluid sealant product of alkane modified resin can crosslink in the case of certain temperature and humidity
React the performance for reaching adhering and sealing.Toxic and harmful gas is not discharged simultaneously, oily substance is not discharged, greatly improves close
Sealing is to the adhesive property of base material.
To achieve these goals, the application provides following technical proposals.
In the first aspect, the application provides a kind of method for preparing low modulus silicane-modified polyurethane resin material, institute
The method of stating may include following step：
S1:At a temperature of 60-100 DEG C, polyether polyol is made to react for the first predetermined time with organic multiple isocyanate, is obtained
To base polyurethane prepolymer for use as；And
S2：At a temperature of 60-100 DEG C, the base polyurethane prepolymer for use as is made to react for the second predetermined time with silane end-cappers,
Obtain the low modulus silicane-modified polyurethane resin material；
Wherein described polyether polyol degree of functionality is 2-3, number-average molecular weight 12000-20000.
In a kind of embodiment of first aspect, the method is additionally included in before step S1, to the polyether polyols
Alcohol carries out dehydration degassing process.
In a kind of embodiment of first aspect, dehydration degassing process is carried out to the polyether polyol and is included in vacuum
Under the conditions of and at a temperature of 100-120 DEG C by the polyether polyol handle the 3rd predetermined time.
In a kind of embodiment of first aspect, when the 3rd predetermined time is 2-5 small.
In a kind of embodiment of first aspect, when first predetermined time is 2-5 small；And/or described second is pre-
Fix time for 2-5 it is small when.
In a kind of embodiment of first aspect, the organic multiple isocyanate includes diphenylmethane diisocyanate
One or more of ester, isophorone diisocyanate or hexamethylene diisocyanate.
In a kind of embodiment of first aspect, in the step S1, the isocyanates of the base polyurethane prepolymer for use as
Base (- NCO) content is 0.6%-1.0%, and the percentage accounts for base polyurethane prepolymer for use as gross mass for the quality of isocyanate group
Percentage.
In a kind of embodiment of first aspect, counted on the basis of weight, in the step S2, silane end-cappers
Additive amount is the 90%-110% of isocyanate group content.
In second aspect, the application provide it is a kind of by as described in relation to the first aspect prepare the low silane-modified poly- ammonia of modulus
The method of ester resin material is come the low modulus silicane-modified polyurethane resin material for preparing.
In a kind of embodiment of second aspect, the low modulus silicane-modified polyurethane resin material with catalyst
The surface drying time that dibutyl tin laurate is uniformly mixed and moisture solidification conserves gel after a week in air is less than or equal to
60 minutes.
Compared with prior art, the advantageous effect of the application is the low modulus silicane-modified polyurethane resinous wood of the application
Expect that viscosity is relatively low under room temperature, colorless and odorless, in the product for preparing low modulus silicane-modified polyurethane fluid sealant, stability is excellent
It is different, moisture cure crosslinking is met, it is environment friendly and pollution-free.
Specific embodiment
Unless otherwise indicated, from context cues or the convention of the prior art is belonged to, otherwise number all in the application
Weight is all based on percentage, and test used and characterizing method are all synchronous with the submission date of the application.It is being applicable in
In the case of, any patent, patent application or disclosure involved in the application are fully incorporated in this as reference, and its
Patent families of equal value is also introduced into as reference, disclosed by these special documents in this field synthetic technology, product
With the definition of fabrication design, polymer, comonomer, initiator or catalyst etc..If the specific art disclosed in the prior art
Defining for language is inconsistent with any definition provided herein, then term provided herein of being subject to defines.
Digital scope in the application is approximation, therefore unless otherwise stated, it may include the number beyond scope
Value.Numberical range include with the increased all numerical value from lower limiting value to upper limit value of 1 unit, condition be any lower value with
There are the intervals of at least two unit between arbitrary high value.If for example, compositional, physics or other property (such as molecules
Amount, melt index (MI) etc.) it is 100 to 1000, it is meant that clearly list all single numbers, such as 100,101,102 etc., with
And all subranges, such as 100 to 166,155 to 170,198 to 200 etc..For comprising the numerical value less than 1 or comprising big
In the scope of 1 fraction (such as 1.1,1.5 etc.), then suitably regard 1 unit as 0.0001,0.001,0.01 or 0.1.
For the scope of the units comprising less than 10 (such as 1 to 5), usually regarding 1 unit as 0.1., these are only intended to table
The specific example of the content reached, and all possible combination of the numerical value between cited minimum and peak is all recognized
For clear record in this application.Numberical range in the application particularly provides various comonomers in acrylate copolymer
In content, content of the various components in photoetching compositions, temperature and these components during acrylic ester synthesizing it is each
Kind feature and property.
On chemical compound in use, unless explicitly stated otherwise, otherwise odd number includes all isomeric forms, otherwise also
So (for example, " hexane " either individually or collectively includes whole isomers of hexane).In addition, it unless explicitly stated otherwise, otherwise uses
"one", the noun that " one kind " or "the" are described also includes its plural form.
Term "comprising", " comprising ", " having " and their derivative are not excluded for any other component, step or mistake
The presence of journey, and whether disclose in this application with these other components, step or process unrelated.To eliminate any query,
Unless expressly stated, otherwise all in the application to use term "comprising"s, the composition of " comprising " or " having ", which can include, appoints
What additional additive, auxiliary material or compound.On the contrary, out to necessary to operating characteristics those, term " substantially by ...
Composition " excludes any other component, step or process outside the scope of any term description.Term " by ...
Composition " does not include any component, step or the process that do not specifically describe or list.Unless expressly stated, otherwise term "or" refers to
The separate member listed or any combination thereof.
In the first aspect, the application provides a kind of method for preparing low modulus silicane-modified polyurethane resin material, institute
The method of stating may include following step：
S1:At a temperature of 60-100 DEG C, polyether polyol is made to react for the first predetermined time with organic multiple isocyanate, is obtained
To base polyurethane prepolymer for use as；And
S2：At a temperature of 60-100 DEG C, the base polyurethane prepolymer for use as is made to react for the second predetermined time with silane end-cappers,
Obtain the low modulus silicane-modified polyurethane resin material；
Wherein described polyether polyol degree of functionality is 2-3, number-average molecular weight 12000-20000.
In second aspect, the application provide it is a kind of by as described in relation to the first aspect prepare the low silane-modified poly- ammonia of modulus
The method of ester resin material is come the low modulus silicane-modified polyurethane resin material for preparing.
In a kind of specific embodiment, this application provides a kind of low modulus silicane-modified polyurethane resin material and its
Preparation method, the preparation method include the following steps：
(1) by certain molecular weight polyether polyol and organic multiple isocyanate mixing and react, obtain base polyurethane prepolymer for use as；
The polyether polyols alcohol functionalities are 2-3, number-average molecular weight 12000-20000；
(2) above-mentioned base polyurethane prepolymer for use as is mixed at a certain temperature with the silane end-cappers with active group
Reaction is to get silicane-modified polyurethane resin.
In step (1), the polyether polyol is the polyether polyol of conventional commercial, and for degree of functionality in the range of 2-3, number is equal
Molecular weight control can be used in the range of 12000-20000.It is preferred that the polyether polyol is polyether polyol SD-
1001st, the one or more in polyether polyol SD-1002, polyether polyol SD-1003 and polyether polyol SD-1004.Institute
Polyether polyol SD-1001, SD-1002, SD-1003 and SD-1004 is stated preferably to be provided by Shanghai Dongda Chemical Co., Ltd..
In step (1), it is preferred that the polyether polyol is needed by dehydration degassing process.The dehydration degassing process
It can be carried out according to this field routine operation：I.e. under certain stirring, vacuumized by heating and carry out dehydration degassing.It is described
The treatment temperature of dehydration degassing is preferably 100-120 DEG C, and the processing time of the dehydration degassing can be this field Conventional Time,
Such as 2-3 it is small when.
In step (1), the organic multiple isocyanate is organic multiple isocyanate commonly used in the art.It is preferred that
The organic multiple isocyanate for methyl diphenylene diisocyanate (MDI) and/or isophorone diisocyanate (IPDI) and/
Or hexamethylene diisocyanate (HDI).The methyl diphenylene diisocyanate (MDI) can be each of this field conventional commercial
The MDI-50 of the MDI of kind specification, preferably Yantai Wanhua Polyurethane Co., Ltd's production.Two isocyanide of isophorone
Acid esters (IPDI) can be the IPDI of the IPDI of this field conventional commercial specification, preferably Cohan creation production.The hexa-methylene
Diisocyanate (HDI) can be the HDI of the HDI of this field conventional commercial specification, preferably Cohan creation production.
In step (1), the temperature that the polyether polyol is mixed with isocyanates can be this field ordinary temperature, preferably
For 40-55 DEG C.
In step (1), the polyether polyol can be that such in this field reacts normal with the temperature that isocyanates reacts
Temperature, preferably 75-85 DEG C are advised, is more preferably 80-82 DEG C.
In step (1), the polyether polyol can be that such in this field reacts normal with the time that isocyanates reacts
It advises the time, when preferably 2-3 is small.
In step (1), the reaction generally carries out in reaction kettle commonly used in the art, and the reaction kettle one is well matched
Have a blender, a thermocouple thermometer and a vacuum elbow, the vacuum elbow, which needs to connect vacuum pump etc. to vacuumize, to be set
It is standby.
In step (1), isocyanate group (- NCO) content of the base polyurethane prepolymer for use as is preferably 0.6%-1.0%,
The percentage accounts for the percentage of base polyurethane prepolymer for use as gross mass for the quality of isocyanate group.
In one preferred embodiment of the application, the preparation process of the base polyurethane prepolymer for use as is as follows：Under stirring, in
At 100-120 DEG C, by polyether polyol vacuumize dehydration degassing process 2-3 it is small when after, being then cooled to 40-55 DEG C and adding in has
Machine polyisocyanate compound, reactive polymeric obtain base polyurethane prepolymer for use as.
In step (2), the silane end-cappers with active group are mostly amino-silane terminated dose.The amino silane
End-capping reagent is amino silane commonly used in the art, is preferably J-13.
In step (2), the additive amount of silane end-cappers is the 90%-110% of isocyanate group content, is preferably
98%-105%.
In step (2), the addition temperature of silane end-cappers is 70-85 DEG C, is preferably 78-82 DEG C.
In step (2), when the reaction time is 2-3 small after the addition of silane end-cappers.
It is silane-modified poly- present invention also provides low modulus made from above-mentioned preparation method in a kind of specific embodiment
Urethane resin material.
On the basis of common knowledge of the art, above-mentioned each optimum condition can be combined to get each preferable reality of the application
Example.
Embodiment
Below in conjunction with embodiments herein, clear and complete description is carried out to the technical solution of the application.Such as nothing
It illustrates, reagent used and raw material can all be bought by commercial sources.Actual conditions is not specified in the following example
Experimental method selects according to conventional methods and conditions or according to product manual.
In following embodiments, polyether polyol SD-1001, polyether polyol SD-1002, polyether polyol SD-1003 and
Polyether polyol SD-1004 is provided by Shanghai Dongda Chemical Co., Ltd., and degree of functionality is 2-3, and number-average molecular weight is
12000-20000.Methyl diphenylene diisocyanate (MDI) is the MDI- of Yantai Wanhua Polyurethane Co., Ltd's production
50.Isophorone diisocyanate (IPDI) can be the IPDI of Cohan creation production.Hexamethylene diisocyanate (HDI) can be section
Think the HDI of creation production.
In following implementations, reaction in a reaction kettle equipped with blender, thermocouple thermometer and vacuum plant into
Row.
Embodiment 1
A kind of low modulus silicane-modified polyurethane resin material, is made by following preparation method：
(1) 400g polyether polyol SD-1001 is put into reaction kettle, is warming up to 110 DEG C, stirring vacuumizes dehydration degassing 3
Hour, 40 DEG C are cooled to, then adds in 16g methyl diphenylene diisocyanates (MDI), under 80 DEG C of reaction temperature, reaction
When polyase 13 is small, 416g base polyurethane prepolymer for use as is obtained；Wherein, the degree of functionality of polyether polyol SD-1001 is 2, and number-average molecular weight is
13500；Base polyurethane prepolymer for use as-NCO content be 0.7%；
(2) by under base polyurethane prepolymer for use as stirring obtained by step (1), with 22g amino silane SILQUEST A-1120
Silane (step figure) reacted at 80 DEG C 2-3 it is small when to get.
Embodiment 2
A kind of low modulus silicane-modified polyurethane resin material, is made by following preparation method：
1) 400g polyether polyol SD-1002 is put into reaction kettle, is warming up to 110 DEG C, stirring vacuumizes dehydration degassing 3
Hour, 40 DEG C are cooled to, then adds in 13.2g isophorone diisocyanate (IPDI), under 80 DEG C of reaction temperature, reaction
When polyase 13 is small, 413.2g base polyurethane prepolymer for use as is obtained；Wherein, the degree of functionality of polyether polyol SD-1002z is 2, the equal molecule of number
It measures as 14500；Base polyurethane prepolymer for use as-NCO content be 0.65%；
(2) by under base polyurethane prepolymer for use as stirring obtained by step (1), with 20.4g amino silane SILQUEST A-1120
Silane (step figure) reacted at 80 DEG C 2-3 it is small when to get.
Embodiment 3
A kind of low modulus silicane-modified polyurethane resin material, is made by following preparation method：
1) 400g polyether polyol SD-1003 is put into reaction kettle, is warming up to 110 DEG C, stirring vacuumizes dehydration degassing 3
Hour, 40 DEG C are cooled to, then adds in 8.7g hexamethylene diisocyanates (HDI), under 80 DEG C of reaction temperature, reaction is poly-
Close 3 it is small when, obtain 408.7g base polyurethane prepolymer for use as；Wherein, the degree of functionality of polyether polyol SD-1003 is 2, and number-average molecular weight is
16000；Base polyurethane prepolymer for use as-NCO content be 0.55%；
(2) by under base polyurethane prepolymer for use as stirring obtained by step (1), with 17.3g amino silane SILQUEST A-1120
Silane (step figure) reacted at 80 DEG C 2-3 it is small when to get.
Embodiment 4
A kind of low modulus silicane-modified polyurethane resin material, is made by following preparation method：
1) 400g polyether polyol SD-1004 is put into reaction kettle, is warming up to 110 DEG C, stirring vacuumizes dehydration degassing 3
Hour, 40 DEG C are cooled to, then adds in 6.5g hexamethylene diisocyanates (HDI), under 80 DEG C of reaction temperature, reaction is poly-
Close 3 it is small when, obtain 406.5g base polyurethane prepolymer for use as；Wherein, the degree of functionality of polyether polyol SD-1004 is 2, and number-average molecular weight is
20000；Base polyurethane prepolymer for use as-NCO content be 0.38%；
(2) by under base polyurethane prepolymer for use as stirring obtained by step (1), with 11.9g amino silane SILQUEST A-1120
Silane (step figure) reacted at 80 DEG C 2-3 it is small when to get.
Embodiment 5
A kind of low modulus silicane-modified polyurethane resin material, is made by following preparation method：
1) 200g polyether polyol SD-1001 and 200g polyether polyol SD-1004 is put into reaction kettle, is warming up to 110
DEG C, stirring, vacuumize dehydration degassing 3 it is small when, be cooled to 40 DEG C, then add in 9.1g hexamethylene diisocyanates (HDI),
Under 80 DEG C of reaction temperature, when reactive polymeric 3 is small, 409.1g base polyurethane prepolymer for use as is obtained；Wherein, polyether polyol SD-1001
Degree of functionality for 2, number-average molecular weight 13500；The degree of functionality of polyether polyol SD-1004 is 2, number-average molecular weight 20000；
Base polyurethane prepolymer for use as-NCO content be 0.6%；
(2) by under base polyurethane prepolymer for use as stirring obtained by step (1), with 18.8g amino silane SILQUEST A-1120
Silane (step figure) reacted at 80 DEG C 2-3 it is small when to get.
Effect example
At 25 DEG C, the low modulus silicane-modified polyurethane resin material viscosity of testing example 1-5, is tested simultaneously respectively
Its with catalyst dibutyltin dilaurylate after mixing, the moisture solidification maintenance modulus of gel, surface drying after a week in air
With tensile strength, test result is as shown in table 1 below for time, elongation at break.
The performance data of 1. low modulus silicane-modified polyurethane resin material of table and its gel
The above-mentioned description to embodiment is understood that for the ease of those skilled in the art and using this Shen
Please.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiments without paying performing creative labour.Therefore, the application is not limited to implementation here
Example, those skilled in the art make according to herein disclosed content in the case where not departing from the application scope and spirit
It improves and changes within all scope of the present application.
Claims (10)
1. a kind of method for preparing low modulus silicane-modified polyurethane resin material, the described method includes following step：
S1:At a temperature of 60-100 DEG C, polyether polyol is made to react for the first predetermined time with organic multiple isocyanate, is gathered
Urethane performed polymer；And
S2：At a temperature of 60-100 DEG C, the base polyurethane prepolymer for use as is made to react for the second predetermined time with silane end-cappers, is obtained
The low modulus silicane-modified polyurethane resin material；
Wherein described polyether polyol degree of functionality is 2-3, number-average molecular weight 12000-20000.
2. the method for low modulus silicane-modified polyurethane resin material is prepared as described in claim 1, which is characterized in that described
Method is additionally included in before step S1, and dehydration degassing process is carried out to the polyether polyol.
3. the method for low modulus silicane-modified polyurethane resin material is prepared as claimed in claim 2, which is characterized in that institute
It states polyether polyol and carries out dehydration degassing process including under vacuum and at a temperature of 100-120 DEG C that the polyethers is more
First alcohol handled for the 3rd predetermined time.
4. the method for low modulus silicane-modified polyurethane resin material is prepared as claimed in claim 3, which is characterized in that described
When 3rd predetermined time was 2-5 small.
5. the method for preparing low modulus silicane-modified polyurethane resin material as any one of claim 1-4, special
Sign is, when first predetermined time is 2-5 small；And/or second predetermined time for 2-5 it is small when.
6. the method for preparing low modulus silicane-modified polyurethane resin material as any one of claim 1-4, special
Sign is that the organic multiple isocyanate includes methyl diphenylene diisocyanate, isophorone diisocyanate or six methylenes
One or more of group diisocyanate.
7. the method for preparing low modulus silicane-modified polyurethane resin material as any one of claim 1-4, special
Sign is, in the step S1, isocyanate group (- NCO) content of the base polyurethane prepolymer for use as is 0.6%-1.0%, institute
State the percentage that the quality that percentage is isocyanate group accounts for base polyurethane prepolymer for use as gross mass.
8. the method for preparing low modulus silicane-modified polyurethane resin material as any one of claim 1-4, special
Sign is, is counted on the basis of weight, and in the step S2, the additive amount of silane end-cappers is isocyanate group content
90%-110%.
9. a kind of side for preparing low modulus silicane-modified polyurethane resin material by as any one of claim 1-8
Method is come the low modulus silicane-modified polyurethane resin material for preparing.
10. low modulus silicane-modified polyurethane resin material as claimed in claim 9, which is characterized in that the low modulus silicon
Alkane modified polyurethane resin material be uniformly mixed with catalyst dibutyltin dilaurylate and in air moisture solidification conserve
The surface drying time of gel is less than or equal to 60 minutes after a week.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109852343A (en) * | 2018-12-26 | 2019-06-07 | 上海东大化学有限公司 | A kind of silane-modified nail-free glue and preparation method thereof |
| CN111471155A (en) * | 2020-05-08 | 2020-07-31 | 株洲飞鹿高新材料技术股份有限公司 | Silane-terminated modified polyurethane resin, high-strength low-modulus modified polyurethane sealant and preparation method thereof |
| CN115677971A (en) * | 2022-11-18 | 2023-02-03 | 道生天合材料科技(上海)股份有限公司 | Polyurethane prepolymer and preparation method thereof |
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| CN109852343A (en) * | 2018-12-26 | 2019-06-07 | 上海东大化学有限公司 | A kind of silane-modified nail-free glue and preparation method thereof |
| CN111471155A (en) * | 2020-05-08 | 2020-07-31 | 株洲飞鹿高新材料技术股份有限公司 | Silane-terminated modified polyurethane resin, high-strength low-modulus modified polyurethane sealant and preparation method thereof |
| CN115677971A (en) * | 2022-11-18 | 2023-02-03 | 道生天合材料科技(上海)股份有限公司 | Polyurethane prepolymer and preparation method thereof |
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Application publication date: 20180529 |