CN108047923A - Assembled architecture modified silicone seal gum primary coat liquid and preparation method thereof - Google Patents
Assembled architecture modified silicone seal gum primary coat liquid and preparation method thereof Download PDFInfo
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- CN108047923A CN108047923A CN201711447622.9A CN201711447622A CN108047923A CN 108047923 A CN108047923 A CN 108047923A CN 201711447622 A CN201711447622 A CN 201711447622A CN 108047923 A CN108047923 A CN 108047923A
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- silane
- primary coat
- modified silicone
- coat liquid
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
-
- 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
- C08G18/30—Low-molecular-weight compounds
- C08G18/38—Low-molecular-weight compounds having heteroatoms other than oxygen
- C08G18/3855—Low-molecular-weight compounds having heteroatoms other than oxygen having sulfur
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/544—Silicon-containing compounds containing nitrogen
Abstract
The invention discloses a kind of assembled architecture modified silicone seal gum primary coat liquid and preparation method thereof, the modified silicone seal gum primary coat liquid includes the following component calculated by weight：Polyurethane prepolymer A；Silane-modified Isocyanate prepolymers body B；Ethyl orthosilicate 0.5 ~ 2%；Silane coupling agent 0.1 ~ 1.5%；Tin catalyst 0.05 ~ 0.2%；Amines catalyst 0.02 ~ 0.1%；Solvent 49 ~ 68%；Wherein, polyurethane prepolymer A is prepared by methyl diphenylene diisocyanate and polyol reaction, and the silane-modified isocyanates is prepared by silane and isocyanate-monomer reaction.Assembled architecture of the present invention is good to the applicability of fluid sealant with modified silicone seal gum primary coat liquid, and curing rate is fast, and mechanical property is good, water-tolerant, is not easy tacky, and resistance to soiling is good, and easy to use.
Description
Technical field
The present invention relates to high molecule sealing materials field, in particular it relates to a kind of assembled architecture modified silicon
Ketone seal gum primary coat liquid and preparation method thereof.
Background technology
Assembled architecture (PC buildings) be construction industry once great innovation, with energy saving, section material, it is water-saving, save land
And the advantages such as environment-friendly type, there is huge application prospect.But the development of assembled architecture industry also has some problems needs to go gram
Clothes, such as the water proofing property of live splicing seams are inadequate.Traditional mortar of filling up is easy to crack in delivery position, and is used at the position
Traditional silicone adhesive or polyurethane adhesive, which is sealed, equally exists some defects：Silicone adhesive is not good enough to concrete bonding, and
And its surface cannot brush, and influence subsequent brushing paint operation；Polyurethane sealant ultraviolet ageing test in effect compared with
Difference.From the point of view of resultant effect, the strong modified silicone seal gum of ultraviolet aging resistance, displacement capacity becomes assembled architecture inner-outer wall seam
The first choice of sealing.The wallboard of assembled architecture is completed in factory, in the preparation generally can be in mould for the convenience of the demoulding
Releasing agent is brushed in tool, these releasing agents for remaining in concrete surface influence whether cementability of the fluid sealant to concrete, change
Property silicone sealant is no exception.Therefore for the permanent seal of seam, concrete interface is done suitably before fluid sealant construction
Processing seem very necessary, brushing primary coat is considered as the way of most effective most convenient.
Silicone adhesive, polyurethane adhesive also need the situation of primary coat used in everyday through being commonly encountered, for example encounter difficult viscous base
When material or undesirable substrate surface property, but pass through our test and external research experience, find conventional silicon
The primary coat that alkane coupling agent is prepared or base polyurethane prepolymer for use as is prepared is not particularly suited for modified silicone seal gum, particularly two-component
Modified silicone seal gum is after these primary coats are used, and bonding force is almost without being obviously improved, and due to two-component modified silicon
Ketone seal gum is all very weak to the substrate bonding including concrete in the case of no primary coat, in addition, modified silicone glue
Small molecular auxiliary agent by easily migrating to the surface of glue after a certain period of time, and film surface is tacky, to splicing seams junction and PC
Building pollutes, and covering with paint property is poor, and presentation quality is bad, and resistance to soiling is poor, and small molecule is gathered in interface and can further interfere with and changes
Property silicone adhesive and PC building between cohesive force.Therefore need to seek suitable primary coat liquid.
The content of the invention
Based on this, the defects of the invention reside in the prior art is overcome, a kind of assembled architecture is provided and is sealed with modified silicone
Glue primary coat liquid, good to the applicability of fluid sealant it is suitable for the primary coat of assembled architecture modified silicone seal gum, curing rate
Soon, mechanical property is good, water-tolerant, is not easy tacky, and resistance to soiling is good, and easy to use.
Another object of the present invention is to provide the preparation side of the assembled architecture modified silicone seal gum primary coat liquid
Method.
Its technical solution is as follows：
A kind of assembled architecture modified silicone seal gum primary coat liquid, including the component calculated by weight as follows：
Polyurethane prepolymer A；
Silane-modified Isocyanate prepolymers body B；
Ethyl orthosilicate 0.5~2%
Silane coupling agent 0.1~1.5%；
Tin catalyst 0.05~0.2%；
Amines catalyst 0.02~0.1%；
Solvent 48~68%；
Wherein, polyurethane prepolymer A is prepared by methyl diphenylene diisocyanate and polyol reaction, institute
Silane-modified isocyanates is stated to be prepared by silane and isocyanate-monomer reaction；The polyurethane prepolymer A changes with silane
Property Isocyanate prepolymers body B weight part ratio be 1:1~3:1, polyurethane prepolymer A and silane-modified Isocyanate prepolymers body B
Account for the 30%~50% of total amount.
The present invention is by selecting suitable polyurethane prepolymer, silane-modified Isocyanate prepolymers body, by itself and positive silicic acid
The cooperations such as ethyl ester, silane coupling agent, tin catalyst, amines catalysis, and a proportioning is adjusted, it has prepared suitable for modified silicone
The primary coat liquid of fluid sealant, after the primary coat liquid primary coat processing of the present invention, fluid sealant has concrete substrate remarkable bonding
Power, and fluid sealant remains to keep this cementability after soaked for a long time, and fluid sealant can keep long-time surface not tacky, it is resistance to
Dirt is good, while the primary coat liquid curing rate is fast, does not delay gluing operation.
In one of the embodiments, the polyurethane prepolymer A is prepared as follows obtaining：By polyol
120 DEG C are heated to, after 3~4h of vacuum dehydration vacuum degree is kept to be cooled to 50~80 DEG C, diphenyl is added under the protection of nitrogen
Methane diisocyanate reacts 2~4h, until NCO mass fractions are remained between 3~6%, cooling discharge, wherein, it is described more
The molar ratio of hydroxyl and isocyano in methyl diphenylene diisocyanate is 1 in hydroxy compounds:1.5~2.1.
In one of the embodiments, the silane-modified Isocyanate prepolymers body B is prepared as follows obtaining：By silicon
Alkane puts into reaction kettle with isocyanate-monomer, reacts 3~5h at 40~70 DEG C, until the mass fraction of residual NCO is 3~6%
Between, the molar ratio of active hydrogen and isocyano in isocyanate-monomer is 1 in cooling discharge, wherein silane:1.2~1.5.
In one of the embodiments, the polyol is polyoxypropyleneglycol, polypropylene oxide triol, gathers
Erythritan, polyadipate ethylene glycol fat glycol, polyadipate hexylene glycol-propylene glycol ester glycol, poly-epsilon-caprolactone glycol,
One or more in castor oil, polyadipate diglycol esterdiol.
In one of the embodiments, the isocyanate-monomer is '-diphenylmethane diisocyanate (MDI), isophorone
One in diisocyanate (IPDI), hexamethylene diisocyanate (HDI), poly methylene poly phenyl poly isocyanate (PAPI)
Kind is a variety of.
In one of the embodiments, the silane is 3- mercaptopropyl trimethoxysilanes, γ-(2,3- the third oxygen of epoxy) third
Base trimethoxy silane, two (γ-trimethoxy-silylpropyl) amine, 3- (2,3- glycidyl) propyl trimethoxy silicane
In one or more.
In one of the embodiments, the tin catalyst be dibutyl tin laurate, it is dibutyltin diacetate, pungent
Sour stannous, two (dodecyl sulphur) dibutyl tins, in one or more.
In one of the embodiments, the amines catalyst be N, N- dimethyl cyclohexyl amines, double (2- dimethylamino second
Base) ether, N, N, N', N'- tetramethyls Alkylenediamine, triethylamine, N, N- dimethyl benzylamines, N-ethylmorpholine, N, N '-diethyl
One or more in piperazine, triethanolamine, DMEA.
The silane coupling agent is γ-(the third oxygen of 2,3- epoxies) propyl trimethoxy silicane, N- β-(aminoethyl)-γ-ammonia
One or more in propyl trimethoxy silicane, gamma-aminopropyl-triethoxy-silane, 3- aminopropyl trimethoxysilanes.
In one of the embodiments, the solvent for toluene, dimethylbenzene, acetone, ethyl acetate, butanone, butyl acetate,
Cyclohexanone or in one or more.
The assembled architecture of the present invention preparation method of modified silicone seal gum primary coat liquid, includes the following steps：It will
Polyurethane prepolymer A is mixed with silane-modified Isocyanate prepolymers body B, add in solvent be uniformly mixed, add ethyl orthosilicate,
Silane coupling agent, tin catalyst and amines catalyst discharge after stirring evenly, are sealed.
Assembled architecture of the present invention is simple with the preparation method of modified silicone seal gum primary coat liquid, it is only necessary to each component
Room temperature is mixed evenly.In use, to ensure that concrete substrate is dustless and dry, the primary coat liquid of preparation is brushed
It applies, generally requires and brush 2~3 times back and forth, gluing operation can be carried out at once after finishing by brushing operation.
The beneficial effects of the present invention are：Primary coat liquid of the present invention has assembled architecture modified silicone seal gum
There is outstanding applicability, after the primary coat liquid primary coat processing of the present invention, fluid sealant can be significantly improved, concrete substrate is glued
Relay can also improve the water resistance and resistance to soiling of fluid sealant, brush the present invention primary coat liquid after fluid sealant after soaked 7 days still
The cementability to concrete can be kept, is more than《JC/T 881-2001 concrete joint fluid sealants》Immersion 4 days in standard
Test specification, and assembled architecture of the present invention is fast with modified silicone seal gum primary coat liquid curing rate, construction efficiency is high.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention more comprehensible, below in conjunction with specific embodiment, to this
Invention is described in further detail.It should be appreciated that the specific embodiments described herein are only explaining this hair
It is bright, do not limit protection scope of the present invention.
Embodiment 1
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition are as follows：
Polyurethane prepolymer A 100g；
Silane-modified Isocyanate prepolymers body B 100g；
Ethyl orthosilicate 5g
N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane 2.5g；
Dibutyl tin laurate 0.5g；
N, N- dimethyl cyclohexyl amine 0.25g；
Ethyl acetate 291g；
The preparation process of polyurethane prepolymer A is as follows：By polyethers DL-100D (the Shandong blue stars that 200g molecular weight is 1000
Dong great Co., Ltds) at 120 DEG C after vacuum dehydration 4h, logical nitrogen is cooled to 80 DEG C, at such a temperature by 76g diphenyl methanes two
Isocyanates is put into, and insulated and stirred reaction 4h until the isocyanate value of final product reaches 3%, is finally cooled to room temperature, goes out
Expect and be sealed.
The preparation process of silane-modified Isocyanate prepolymers body B is as follows：300g by 3- mercaptopropyl trimethoxysilanes with
230g '-diphenylmethane diisocyanates put into reaction kettle, react 5h at 50 DEG C, until the mass fraction of residual NCO is 3%, cooling
It discharges and is sealed.
Polyurethane prepolymer A with silane-modified Isocyanate prepolymers body B is mixed by above-mentioned parts by weight, solvent is added in and mixes
It closes, adds ethyl orthosilicate, silane coupling agent, tin catalyst and amines catalyst, discharge sealing after stirring evenly
It preserves.
Embodiment 2
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition are as follows：
Polyurethane prepolymer A 100g；
Silane-modified Isocyanate prepolymers body B 100g；
N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane 7.5g；
Ethyl orthosilicate 6.4g
Dibutyl tin laurate 1g；
N, N- dimethyl cyclohexyl amine 0.1g；
Ethyl acetate 285g.
Polyurethane prepolymer A, the preparation process of silane-modified Isocyanate prepolymers body B are same as Example 1.By embodiment
1 preparation method prepares assembled architecture modified silicone seal gum primary coat liquid.
Embodiment 3
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition are as follows：
Polyurethane prepolymer A 150g；
Silane-modified Isocyanate prepolymers body B 100g；
Ethyl orthosilicate 2.75g
N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane 0.5g；
Dibutyl tin laurate 0.25g；
N, N- dimethyl cyclohexyl amine 0.5g；
Ethyl acetate 246g.
Polyurethane prepolymer A, the preparation process of silane-modified Isocyanate prepolymers body B are same as Example 1.By embodiment
1 preparation method prepares assembled architecture modified silicone seal gum primary coat liquid.
Embodiment 4
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition are as follows：
Polyurethane prepolymer A 112.5g；
Silane-modified Isocyanate prepolymers body B 37.5g；
Ethyl orthosilicate 10g
N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane 5g；
Dibutyl tin laurate 2.5g；
N, N- dimethyl cyclohexyl amine 2.5g；
Ethyl acetate 330g.
Polyurethane prepolymer A, the preparation process of silane-modified Isocyanate prepolymers body B are same as Example 1.By embodiment
1 preparation method prepares assembled architecture modified silicone seal gum primary coat liquid.
Embodiment 5
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition are as follows：
Polyurethane prepolymer A 120g；
Silane-modified Isocyanate prepolymers body B 120g；
Ethyl orthosilicate 5g
N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane 7.5g；
Dibutyl tin laurate 5g；
N, N- dimethyl cyclohexyl amine 2.5g；
Ethyl acetate 240g.
Polyurethane prepolymer A, the preparation process of silane-modified Isocyanate prepolymers body B are same as Example 1.By embodiment
1 preparation method prepares assembled architecture modified silicone seal gum primary coat liquid.
Embodiment 6
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition is same as Example 1, and difference lies in institutes
The preparation process for stating polyurethane prepolymer A is as follows：100g molecular weight is taken off for vacuum at 1,000 120 DEG C of polytetrahydrofuran diol
After water 4h, logical nitrogen is cooled to 50 DEG C, at such a temperature puts into 52.5g methyl diphenylene diisocyanates, insulated and stirred is anti-
4h is answered, until the isocyanate value of final product reaches 6%, room temperature is finally cooled to, discharges and be sealed.
Embodiment 7
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition is same as Example 1, and difference lies in institutes
Silane-modified Isocyanate prepolymers body B is stated to be prepared as follows obtaining：By 180g bis- (γ-trimethoxy-silylpropyl)
Amine puts into reaction kettle with 88g isoflurane chalcone diisocyanates monomer, reacts 4h at 55 DEG C, until the mass fraction of residual NCO exists
5%, cooling discharge.
Embodiment 8
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition are as follows：
Polyurethane prepolymer A 100g；
Silane-modified Isocyanate prepolymers body B 100g；
N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane 2.5g；
Two (dodecyl sulphur) dibutyl tin 0.5g；
N, N- dimethyl benzylamine 0.25g；
Ethyl acetate 200g；
Acetone 96g；
Polyurethane prepolymer A, the preparation process of silane-modified Isocyanate prepolymers body B are same as Example 1.By embodiment
1 preparation method prepares assembled architecture modified silicone seal gum primary coat liquid.
Comparative example 1
The polyurethane silane coupling agent PU100 for being applicable in polyurethane sealant that Yong Xu sealing elements Co., Ltd is selected to prepare.
Comparative example 2
Not brush primary coat liquid, directly test piece maintenance is made in sizing to concrete block after the cleaning.
Comparative example 3
A kind of assembled architecture modified silicone seal gum primary coat liquid, composition is substantially similar to embodiment 1, distinguishes
In, the silane-modified Isocyanate prepolymers body B described in silane chain extender alternate embodiment 1 of this comparative example 3, and positive silicon is not used
Acetoacetic ester, silane chain extender are prepared as follows obtaining：By 66 parts of γ-glycidyl ether oxygen propyl trimethoxy silicanes and 18
Part dimethylbenzene is added in flask is slowly added to 45 parts of ethanolamines at a temperature of 75 DEG C, when then insulation reaction 2.5 is small, obtains silane
Chain extender.
Polyurethane prepolymer A, catalyst are mixed, above-mentioned silane chain extender is slowly added under the conditions of adding in 85 DEG C, is added dropwise
After insulation reaction 2 it is small when, add solvent, silane coupling agent, be uniformly mixing to obtain primary coat liquid.
By the assembled architecture obtained by embodiment 1-8 and comparative example 1-3 with modified silicone seal gum primary coat liquid coated on mixed
On solidifying soil test specimen, tensile propcrties test, soaked test and drying time test are carried out, test method or standard are as follows：
(1) tensile propcrties are tested：According to standard《The test of GB/T13477.8-2002 tensile propcrties》In concrete
Primary coat 3 times is brushed on test specimen cavity inner wall, the two-component modified silicone glue stirred evenly is squeezed into cavity, test specimen progress is made
Maintenance carries out extension test after being conserved 14 days according to A methods；
(2) soaked test：The test specimen conserved is immersed in distilled water, soaking time is taken out at the standard conditions after 7 days
Extension test is carried out after hanging 1 day；
(3) drying time tests：With each 3 times of the uniform brushing primary coat liquid of brush, measurement surface drying time on concrete.
(4) resistance to soiling is tested：Primary coat 3 times is brushed on concrete sample cavity inner wall, the two-component stirred evenly is changed
Property silicone adhesive, which is squeezed into cavity, is made test specimen, according to《The test of GB/T13477.8-2002 tensile propcrties》A methods maintenance 14
My god, then with the lines of 3 1-2cm of free ink pen picture, wet towel wiping if wiping can scrub for 1-2 times, shows it
Resistance to soiling is excellent, if 3-4 ability wiped clean of wiping, shows that its resistance to soiling is general, if being unable to wiped clean for 4 times shows it
Resistance to soiling is poor.
Test result is shown in Table 1.
Table 1
Test specimen is stretched to destruction, and bond failure or cohesional failure are generally divided by the situation of destruction, cohesional failure i.e. from
Colloid internal sabotage, this indicates that glue is good to the bonding force of concrete, that is, primary coat is good to the applicability of glue；Bonding is broken in this way
Bad is that glue is destroyed in the interface of glue and concrete, this illustrates glue and concrete bonding force difference.
It was found from above-mentioned test result, the primary coat liquid prepared by base polyurethane prepolymer for use as of no inorganic agent and routine is all inapplicable
In two-component modified silicone seal gum, have to the bonding force effect for improving two-component modified silicone seal gum and concrete substrate
Limit can not meet standard requirement.The primary coat liquid of the present invention has outstanding be applicable in assembled architecture modified silicone seal gum
Property, after the primary coat liquid processing of the present invention, fluid sealant has concrete substrate remarkable bonding force, and fluid sealant is long-term
It remains to keep this cementability after soaked, and the resistance to soiling of fluid sealant is excellent, while the primary coat curing rate is fast, does not delay gluing
Operation.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and description is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that come for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of assembled architecture modified silicone seal gum primary coat liquid, which is characterized in that including as follows by weight percentage
The component of calculation：
Polyurethane prepolymer A；
Silane-modified Isocyanate prepolymers body B；
Ethyl orthosilicate 0.5 ~ 2%；
Silane coupling agent 0.1 ~ 1.5%；
Tin catalyst 0.05 ~ 0.2%；
Amines catalyst 0.02 ~ 0.1%；
Solvent 48 ~ 68%；
Wherein, polyurethane prepolymer A is prepared by methyl diphenylene diisocyanate and polyol reaction, the silicon
Alkane modified isocyanate is prepared by silane and isocyanate-monomer reaction；The polyurethane prepolymer A with it is silane-modified different
The weight part ratio of cyanate performed polymer B is 1:1~3:1, polyurethane prepolymer A and silane-modified Isocyanate prepolymers body B account for total amount
30%~50%.
2. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the polyurethane
Prepolymer A is prepared as follows obtaining：Polyol is heated to 120 DEG C, vacuum degree is kept after 3 ~ 4h of vacuum dehydration
50 ~ 80 DEG C are cooled to, methyl diphenylene diisocyanate is added under the protection of nitrogen and reacts 2 ~ 4h, until residual NCO mass
Fraction is between 3 ~ 6%, cooling discharge, wherein, in the polyol hydroxyl with it is different in methyl diphenylene diisocyanate
The molar ratio of cyanate radical is 1：1.5~2.1.
3. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the silane changes
Property Isocyanate prepolymers body B is prepared as follows obtaining：Silane and isocyanate-monomer are put into reaction kettle, at 40 ~ 70 DEG C
React 3 ~ 5h, until residual NCO mass fraction between 3 ~ 6%, active hydrogen and isocyanates in cooling discharge, wherein silane
The molar ratio of isocyano is 1 in monomer：1.2~1.5.
4. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the polyhydroxy
Compound is polyoxypropyleneglycol, polypropylene oxide triol, polytetrahydrofuran diol, polyadipate ethylene glycol fat glycol, poly-
In adipic acid hexylene glycol-propylene glycol ester glycol, poly-epsilon-caprolactone glycol, castor oil, polyadipate diglycol esterdiol
One or more.
5. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the isocyanic acid
Ester monomer is '-diphenylmethane diisocyanate, isoflurane chalcone diisocyanate, hexamethylene diisocyanate, the more benzene of polymethylene
One or more in the isocyanates of Quito.
6. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the silane is
3- mercaptopropyl trimethoxysilanes, γ-(the third oxygen of 2,3- epoxies) propyl trimethoxy silicane, two（γ-trimethyoxysilane
Base propyl）Amine, 3-（2,3- glycidyl）One or more in propyl trimethoxy silicane.
7. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the tin class is urged
Agent is dibutyl tin laurate, one kind in dibutyltin diacetate, stannous octoate, two (dodecyl sulphur) dibutyl tins
It is or a variety of.
8. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the amine is urged
Agent is N, N- dimethyl cyclohexyl amines, double (2- dimethylaminoethyls) ethers, N, N, N', N'- tetramethyls Alkylenediamine, three second
Amine, N, N- dimethyl benzylamines, N-ethylmorpholine, N, the one or more in N '-diethyl piperazine, triethanolamine, DMEA.
9. assembled architecture modified silicone seal gum primary coat liquid according to claim 1, which is characterized in that the silane is even
Connection agent for γ-(the third oxygen of 2,3- epoxies) propyl trimethoxy silicane, N- β-(aminoethyl)-γ-aminopropyltrimethoxysilane,
One or more in gamma-aminopropyl-triethoxy-silane, 3- aminopropyl trimethoxysilanes.
10. the preparation method of assembled architecture modified silicone seal gum primary coat liquid described in claim 1-9 any claims,
It is characterised in that it includes following steps：Polyurethane prepolymer A with silane-modified Isocyanate prepolymers body B is mixed, adds in solvent
It is uniformly mixed, adds ethyl orthosilicate, silane coupling agent, tin catalyst and amines catalyst, discharge after stirring evenly
It is sealed.
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| CN201711447622.9A CN108047923B (en) | 2017-12-27 | 2017-12-27 | Modified silicone sealant primer for fabricated building and preparation method thereof |
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| CN201711447622.9A CN108047923B (en) | 2017-12-27 | 2017-12-27 | Modified silicone sealant primer for fabricated building and preparation method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111117410A (en) * | 2018-10-31 | 2020-05-08 | 娄从江 | High-water-resistance primer for silane modified building sealant |
| CN111117376A (en) * | 2018-10-31 | 2020-05-08 | 娄从江 | Primer for silane modified building sealant |
| CN111117411A (en) * | 2018-10-31 | 2020-05-08 | 娄从江 | High-stability in-situ formulation primer for silane modified building sealant |
| CN111117411B (en) * | 2018-10-31 | 2021-10-29 | 娄从江 | High-stability in-situ formulation primer for silane modified building sealant |
| CN111117489B (en) * | 2018-10-31 | 2022-01-07 | 娄从江 | Primer for silane modified building sealant with rapid film formation and high barrier property |
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| CN112225870A (en) * | 2020-10-15 | 2021-01-15 | 北京理工大学 | Preparation method of bonding-free polyurethane lining die |
| CN115820099A (en) * | 2021-09-17 | 2023-03-21 | 中海油常州涂料化工研究院有限公司 | Solvent-free polyaspartate polyurea coating and preparation method thereof |
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Address after: 528303 one of the 38 industrial parks in Hongqi Middle Road, Shunde District, Foshan, Guangdong. Patentee after: KESHUN WATERPROOF TECHNOLGIES Co.,Ltd. Address before: 528303 Guangdong Province, Foshan city Shunde District Ronggui Rongqi Road No. fifteen Tiancheng Building Floor Patentee before: KESHUN WATERPROOF TECHNOLGIES Co.,Ltd. |