CN106947426A - A kind of preparation method of weather resistant fluid sealant for building - Google Patents
A kind of preparation method of weather resistant fluid sealant for building Download PDFInfo
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- CN106947426A CN106947426A CN201710190824.3A CN201710190824A CN106947426A CN 106947426 A CN106947426 A CN 106947426A CN 201710190824 A CN201710190824 A CN 201710190824A CN 106947426 A CN106947426 A CN 106947426A
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—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
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
-
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/71—Monoisocyanates or monoisothiocyanates
- C08G18/718—Monoisocyanates or monoisothiocyanates containing silicon
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- 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
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
-
- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- 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
- C08K5/04—Oxygen-containing compounds
- C08K5/13—Phenols; Phenolates
- C08K5/134—Phenols containing ester groups
- C08K5/1345—Carboxylic esters of phenolcarboxylic acids
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- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Inorganic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention discloses a kind of preparation method of weather resistant fluid sealant for building, belong to the technical field of encapsulant.The present invention first mixes two kinds of different PPGs, and heating in vacuum removing bubble and water, it is subsequently added isocyanatopropyl triethoxysilane and dibutyl tin laurate, heated after vacuumizing and end silicane-modified polyurethane performed polymer is made, nano-calcium carbonate is surface-treated followed by oleic acid, optimize its high opacity and high brightness, improve the whiteness and mechanical property of product, finally by end silicane-modified polyurethane performed polymer, polypropylene glycol and modified nano calcium carbonate etc. are stirred under vacuum, it is subsequently added alkenyl trimethoxy silane, antioxidant etc. can obtain weather resistant fluid sealant for building, fluid sealant obtained by the present invention can be heat-resisting for a long time, it is difficult by ultraviolet illumination aging, quick solidifying, do not foamed in hot and humid environment lower glue layer, water resistance and good weatherability, the high performance requirements of architectural decoration glue can be met.
Description
Technical field
The invention discloses a kind of preparation method of weather resistant fluid sealant for building, belong to the technical field of encapsulant.
Background technology
Modern architecture teacher is man and nature exchange in process of architecture design is carried out, and the visual effect of people is put into
The characteristics of one very important status, glass curtain wall and lighting roof are because of its " light, thin, saturating ", it has also become one of modern architecture
Pith.Lighting roof, point supported curtain wall etc. are mostly using transparent white glass and the aluminium alloy extrusions of silver color, if having supported the use face
The fluid sealant of color, then can influence the whole structure of curtain wall and the visual appearance of people, and neutral transparent fluid sealant be able to compensate its defect.
Fluid sealant is to guide to deform with sealing surface shape, is difficult trickling, there is the encapsulant of certain caking property.Be for
Fill gap, the adhesive to play sealing function.With the effect such as anti-leak, waterproof, vibration proof and sound insulation, heat-insulated.Generally
Dope using the dryness such as pitch thing, natural resin or synthetic resin, natural rubber or synthetic rubber or non-dryness is matched somebody with somebody as base-material
The inert fillers such as talcum powder, carclazyte, carbon black, titanium dioxide and asbestos are closed, the system such as plasticizer, solvent, curing agent, accelerator is added
Into.Elastic sealant, material for liquid seal packing and sealant three major types can be divided into.It is widely used in building, communications and transportation, electronics
The sealing of instruments and meters and parts.There is the fluid sealant produced at present excellent wearability, low-temperature pliability, performance can adjust
Scope is wider, and mechanical strength is big, and elasticity is good, with excellent restoration, is suitably adapted for dynamic juncture；Oil resistance is excellent, resistance to
Biological aging, the characteristics of moderate.But can not be heat-resisting for a long time, light color formula is easily by ultraviolet illumination aging, generally solidification
Relatively slow, the bonding to pore-free material is needed to be surface-treated with primer, and the foaming of glue-line is easily caused under hot and humid environment,
Poor water resistance, adhesive property is bad.Therefore work out that a kind of curing rate is fast, water-tolerant, adhesive property is excellent, using being difficult
The fluid sealant of foaming, has good development prospect and social value in association area.
The content of the invention
The technical problems to be solved by the invention：Can not be heat-resisting for a long time for the fluid sealant used at present, easily by ultraviolet
Illumination ageing, solidification is relatively slow, and the foaming of glue-line is easily caused under hot and humid environment, and poor water resistance, adhesive property is bad
Defect is there is provided a kind of method of weather resistant fluid sealant for building, and the present invention first mixes two kinds of different PPGs, and
Heating in vacuum removes bubble and water, is subsequently added isocyanatopropyl triethoxysilane and dibutyl tin laurate, vacuumizes
Heat afterwards and end silicane-modified polyurethane performed polymer is made, nano-calcium carbonate is surface-treated followed by oleic acid, optimizes it
High opacity and high brightness, improve the whiteness and mechanical property of product, finally by end silicane-modified polyurethane performed polymer, poly- the third two
Alcohol and modified nano calcium carbonate etc. are stirred under vacuum, and being subsequently added alkenyl trimethoxy silane, antioxidant etc. can obtain for building
Weather resistant fluid sealant, the fluid sealant obtained by the present invention can be heat-resisting for a long time, is difficult by ultraviolet illumination aging, quick solidifying, in high temperature
High humidity environment lower glue layer does not foam, water resistance and good weatherability, can meet the high performance requirements of architectural decoration glue.
In order to solve the above technical problems, the present invention is using technical scheme as described below：
(1) 50~60mL PPGs 2000 are measured, 50~60mL PPGs 3000 load high-pressure reactor
In, 20~30min is stirred with 300~400r/min, it is 100~300Pa then to seal and be evacuated to vacuum in reactor,
110~120 DEG C of 2~3h of pretreatment are again heated to, are cooled to after room temperature, compound PPG must be pre-processed；
(2) it is combined to above-mentioned pretreatment in PPG and adds 160~240mL isocyanatopropyl triethoxysilanes,
3.0~3.6mL dibutyl tin laurates, and it is 10~100Pa to be evacuated to vacuum in reactor, is subsequently passed nitrogen extremely
Pressure is 3~5kPa in kettle, and is heated to 75~80 DEG C, and keeping temperature reacts 6~8h, is cooled to after room temperature and discharges, obtains end silicon
Alkane modified polyurethane prepolymer, it is standby；
(3) 200~300g nano-calcium carbonates are weighed, adds in 500~600mL absolute ethyl alcohols, is stirred with 300~400r/min
15~20min is mixed, 7~10mL oleic acid is added, and is heated to 60~70 DEG C, continues to stir 2~3h, is cooled to mistake after room temperature
Filter residue, with absolute ethanol washing filter residue 2~3 times, is then transferred in drying box by filter, and 2~3h is dried at 120~150 DEG C, is obtained
Modified nano calcium carbonate；
(4) count by weight, weigh end silicane-modified polyurethane performed polymer prepared by 100~120 parts of steps (2), 60
~80 parts of polypropylene glycols, 120~150 parts of above-mentioned modified nano calcium carbonates, 20~30 parts of gas-phase silicas load planetary mixer
In, 20~30min is stirred under vacuum, 6~8 parts of vinyltrimethoxy silanes are added, 4~5 parts of silane resin acceptor kh-550s,
0.3~0.5 part of dibutyl tin laurate, 0.3~0.5 part of antioxidant 1010 continues to be stirred under vacuum 20~30min, then
Discharge to obtain weather resistant fluid sealant for building.The present invention application process be：Floating ash, greasy dirt surfaces to be coated etc. are cleaned first dry
Only, Protection glue band and in the both sides at gluing position is sticked, it is 15~35 DEG C to keep space temperature, humidity is 55~75%, then
Weather resistant fluid sealant for building obtained by the present invention is loaded into glue bottle, top fitting is covered and glue bottle is packed into glue rifle, then in gluing
Last layer fluid sealant is squeezed at position, is gently smeared with the finger of adhesional wetting and is allowed to smooth in colloid surface, finally tears gluing position both sides off
Protection glue band, solidifies 1~3h, after testing, and the tensile strength of the weather resistant fluid sealant for building obtained by the present invention is 15.5
~19.5MPa, elongation at break be 360~440%, surface drying time be 8~10min, workable temperature range be -50~
250℃。
The present invention is compared with other method, and Advantageous Effects are：
(1) the weather resistant fluid sealant for building obtained by the present invention can be heat-resisting for a long time, is difficult by ultraviolet illumination aging, solidification
It hurry up, water resistance and weather resistance are good, can meet the high performance requirements of architectural decoration glue；
(2) the weather resistant fluid sealant for building obtained by the present invention does not foam in hot and humid environment lower glue layer, with good
Bond effect, preparation technology is simple, and required low cost is easy to use, is worth of widely use.
Embodiment
50~60mL PPGs 2000 are measured, 50~60mL PPGs 3000 are fitted into high-pressure reactor, with
300~400r/min stirs 20~30min, and it is 100~300Pa then to seal and be evacuated to vacuum in reactor, then is added
Heat is cooled to after room temperature to 110~120 DEG C of 2~3h of pretreatment, must pre-process compound PPG；It is multiple to above-mentioned pretreatment
Close and 160~240mL isocyanatopropyl triethoxysilanes, 3.0~3.6mL di lauric dibutyls are added in PPG
Tin, and it is 10~100Pa to be evacuated to vacuum in reactor, it is 3~5kPa to be subsequently passed pressure in nitrogen to kettle, and is heated
To 75~80 DEG C, keeping temperature reacts 6~8h, is cooled to after room temperature and discharges, must hold silicane-modified polyurethane performed polymer, standby；
Weigh 200~300g nano-calcium carbonates, add in 500~600mL absolute ethyl alcohols, with 300~400r/min stirrings 15~
20min, adds 7~10mL oleic acid, and is heated to 60~70 DEG C, continues to stir 2~3h, is cooled to after room temperature and filters, with nothing
Filter residue, is then transferred in drying box, 2~3h is dried at 120~150 DEG C, must be modified and receive by water-ethanol washing filter residue 2~3 times
Rice calcium carbonate；Count by weight, weigh the end silicane-modified polyurethane performed polymer of 100~120 parts of preparations, 60~80 parts poly- third
Glycol, 120~150 parts of above-mentioned modified nano calcium carbonates, 20~30 parts of gas-phase silicas are fitted into planetary mixer, vacuum is stirred
20~30min is mixed, 6~8 parts of vinyltrimethoxy silanes, 4~5 parts of silane resin acceptor kh-550s, 0.3~0.5 part are added
Dibutyl tin laurate, 0.3~0.5 part of antioxidant 1010 continues to be stirred under vacuum 20~30min, then discharging to build
Use weather resistant fluid sealant.
Example 1
50mL PPGs 2000 are measured, 50mL PPGs 3000 are fitted into high-pressure reactor, with 300r/min
20min is stirred, it is 100Pa then to seal and be evacuated to vacuum in reactor, be again heated to 110 DEG C of pretreatment 2h, cooling
To room temperature, compound PPG must be pre-processed；It is combined to above-mentioned pretreatment in PPG and adds 160mL isocyanic acids third
Ethyl triethoxy silicane alkane, 3.0mL dibutyl tin laurates, and it is 10Pa to be evacuated to vacuum in reactor, is subsequently passed
Pressure is 3kPa in nitrogen to kettle, and is heated to 75 DEG C, keeping temperature reaction 6h, is cooled to after room temperature and discharges, silane must be held to change
Property base polyurethane prepolymer for use as, it is standby；200g nano-calcium carbonates are weighed, adds in 500mL absolute ethyl alcohols, is stirred with 300r/min
15min, adds 7mL oleic acid, and is heated to 60 DEG C, continues to stir 2h, is cooled to after room temperature and filters, filtered with absolute ethanol washing
Filter residue, is then transferred in drying box by slag 2 times, and 2h is dried at 120 DEG C, modified nano calcium carbonate is obtained；Count, claim by weight
Take the end silicane-modified polyurethane performed polymer of 100 parts of preparations, 60 parts of polypropylene glycols, 120 parts of above-mentioned modified nano calcium carbonates, 20 parts
Gas-phase silica, is fitted into planetary mixer, is stirred under vacuum 20min, adds 6 parts of vinyltrimethoxy silanes, 4 parts of silane
Coupling agent KH-550,0.3 part of dibutyl tin laurate, 0.3 part of antioxidant 1010 continues to be stirred under vacuum 20min, then gone out
Expect to obtain weather resistant fluid sealant for building.
Floating ash, greasy dirt surfaces to be coated etc. are cleaned totally first, and Protection glue band is sticked in the both sides at gluing position, is protected
Space temperature is held for 15 DEG C, humidity is 55%, the weather resistant fluid sealant for building obtained by the present invention is then loaded into glue bottle, put
Glue bottle is simultaneously packed into glue rifle by ozzle, is then squeezed last layer fluid sealant at gluing position, is gently smeared in colloid surface with the finger of adhesional wetting
It is allowed to smooth, finally tears the Protection glue band of gluing position both sides off, solidifies 1h, it is after testing, for building obtained by the present invention
The tensile strength of weather resistant fluid sealant is 15.5MPa, and elongation at break is 360%, and surface drying time is 8min, workable temperature
For -50 DEG C.
Example 2
60mL PPGs 2000 are measured, 60mL PPGs 3000 are fitted into high-pressure reactor, with 400r/min
30min is stirred, it is 300Pa then to seal and be evacuated to vacuum in reactor, be again heated to 120 DEG C of pretreatment 3h, cooling
To room temperature, compound PPG must be pre-processed；It is combined to above-mentioned pretreatment in PPG and adds 240mL isocyanic acids third
Ethyl triethoxy silicane alkane, 3.6mL dibutyl tin laurates, and it is 100Pa to be evacuated to vacuum in reactor, is subsequently passed
Pressure is 5kPa in nitrogen to kettle, and is heated to 80 DEG C, keeping temperature reaction 8h, is cooled to after room temperature and discharges, silane must be held to change
Property base polyurethane prepolymer for use as, it is standby；300g nano-calcium carbonates are weighed, adds in 600mL absolute ethyl alcohols, is stirred with 400r/min
20min, adds 10mL oleic acid, and is heated to 70 DEG C, continues to stir 3h, is cooled to after room temperature and filters, use absolute ethanol washing
Filter residue, is then transferred in drying box by filter residue 3 times, and 3h is dried at 150 DEG C, modified nano calcium carbonate is obtained；Count by weight,
Weigh the end silicane-modified polyurethane performed polymer of 120 parts of preparations, 80 parts of polypropylene glycols, 150 parts of above-mentioned modified nano calcium carbonates, 30
Part gas-phase silica, is fitted into planetary mixer, is stirred under vacuum 30min, adds 8 parts of vinyltrimethoxy silanes, 5 parts of silicon
Alkane coupling agent KH-550,0.5 part of dibutyl tin laurate, 0.5 part of antioxidant 1010 continues to be stirred under vacuum 30min, then
Discharge to obtain weather resistant fluid sealant for building.
Floating ash, greasy dirt surfaces to be coated etc. are cleaned totally first, and Protection glue band is sticked in the both sides at gluing position, is protected
Space temperature is held for 35 DEG C, humidity is 75%, the weather resistant fluid sealant for building obtained by the present invention is then loaded into glue bottle, put
Glue bottle is simultaneously packed into glue rifle by ozzle, is then squeezed last layer fluid sealant at gluing position, is gently smeared in colloid surface with the finger of adhesional wetting
It is allowed to smooth, finally tears the Protection glue band of gluing position both sides off, solidifies 3h, it is after testing, for building obtained by the present invention
The tensile strength of weather resistant fluid sealant is 19.5MPa, and elongation at break is 440%, and surface drying time is 10min, workable temperature
Spend for 250 DEG C.
Example 3
55mL PPGs 2000 are measured, 55mL PPGs 3000 are fitted into high-pressure reactor, with 350r/min
25min is stirred, it is 200Pa then to seal and be evacuated to vacuum in reactor, be again heated to 115 DEG C and pre-process 2.5h, it is cold
But to compound PPG after room temperature, must be pre-processed；It is combined to above-mentioned pretreatment in PPG and adds 200mL isocyanic acids
Propyl-triethoxysilicane, 3.3mL dibutyl tin laurates, and it is 55Pa to be evacuated to vacuum in reactor, it is then logical
It is 4kPa to enter in nitrogen to kettle pressure, and is heated to 77 DEG C, and keeping temperature reaction 7h is cooled to after room temperature and discharged, obtains end silane
Modified polyurethane prepolymer, it is standby；250g nano-calcium carbonates are weighed, adds in 550mL absolute ethyl alcohols, is stirred with 350r/min
17min, adds 8mL oleic acid, and is heated to 65 DEG C, continues to stir 2.5h, is cooled to after room temperature and filters, use absolute ethanol washing
Filter residue, is then transferred in drying box by filter residue 2 times, and 2.5h is dried at 135 DEG C, modified nano calcium carbonate is obtained；By weight
Meter, weighs the end silicane-modified polyurethane performed polymer of 110 parts of preparations, 70 parts of polypropylene glycols, 135 parts of above-mentioned modified nano-meter caco 3s
Calcium, 25 parts of gas-phase silicas, is fitted into planetary mixer, is stirred under vacuum 25min, adds 7 parts of vinyltrimethoxy silanes,
4 parts of silane resin acceptor kh-550s, 0.4 part of dibutyl tin laurate, 0.4 part of antioxidant 1010 continues to be stirred under vacuum
25min, then discharge to obtain weather resistant fluid sealant for building.
Floating ash, greasy dirt surfaces to be coated etc. are cleaned totally first, and Protection glue band is sticked in the both sides at gluing position, is protected
Space temperature is held for 25 DEG C, humidity is 65%, the weather resistant fluid sealant for building obtained by the present invention is then loaded into glue bottle, put
Glue bottle is simultaneously packed into glue rifle by ozzle, is then squeezed last layer fluid sealant at gluing position, is gently smeared in colloid surface with the finger of adhesional wetting
It is allowed to smooth, finally tears the Protection glue band of gluing position both sides off, solidifies 2h, it is after testing, for building obtained by the present invention
The tensile strength of weather resistant fluid sealant is 17.5MPa, and elongation at break is 400%, and surface drying time is 9min, workable temperature
For 100 DEG C.
Claims (1)
1. a kind of preparation method of weather resistant fluid sealant for building, it is characterised in that specifically preparation process is：
(1) 50~60mL PPGs 2000 are measured, 50~60mL PPGs 3000 are fitted into high-pressure reactor, with
300~400r/min stirs 20~30min, and it is 100~300Pa then to seal and be evacuated to vacuum in reactor, then is added
Heat is cooled to after room temperature to 110~120 DEG C of 2~3h of pretreatment, must pre-process compound PPG；
(2) it is combined to above-mentioned pretreatment in PPG and adds 160~240mL isocyanatopropyl triethoxysilanes, 3.0~
3.6mL dibutyl tin laurates, and it is 10~100Pa to be evacuated to vacuum in reactor, is subsequently passed in nitrogen to kettle
Pressure is 3~5kPa, and is heated to 75~80 DEG C, and keeping temperature reacts 6~8h, is cooled to after room temperature and discharges, silane must be held to change
Property base polyurethane prepolymer for use as, it is standby；
(3) 200~300g nano-calcium carbonates are weighed, are added in 500~600mL absolute ethyl alcohols, 15 are stirred with 300~400r/min
~20min, adds 7~10mL oleic acid, and is heated to 60~70 DEG C, continues to stir 2~3h, is cooled to after room temperature and filters, use
Filter residue, is then transferred in drying box by absolute ethanol washing filter residue 2~3 times, and 2~3h is dried at 120~150 DEG C, modification is obtained
Nano-calcium carbonate；
(4) count by weight, weigh end silicane-modified polyurethane performed polymer prepared by 100~120 parts of steps (2), 60~80
Part polypropylene glycol, 120~150 parts of above-mentioned modified nano calcium carbonates, 20~30 parts of gas-phase silicas are fitted into planetary mixer,
20~30min is stirred under vacuum, 6~8 parts of vinyltrimethoxy silanes are added, 4~5 parts of silane resin acceptor kh-550s, 0.3~
0.5 part of dibutyl tin laurate, 0.3~0.5 part of antioxidant 1010 continues to be stirred under vacuum 20~30min, then discharged
Weather resistant fluid sealant for building.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710190824.3A CN106947426A (en) | 2017-03-28 | 2017-03-28 | A kind of preparation method of weather resistant fluid sealant for building |
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| CN201710190824.3A CN106947426A (en) | 2017-03-28 | 2017-03-28 | A kind of preparation method of weather resistant fluid sealant for building |
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| CN106947426A true CN106947426A (en) | 2017-07-14 |
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| CN201710190824.3A Pending CN106947426A (en) | 2017-03-28 | 2017-03-28 | A kind of preparation method of weather resistant fluid sealant for building |
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| CN (1) | CN106947426A (en) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107760249A (en) * | 2017-09-15 | 2018-03-06 | 广东普赛达密封粘胶有限公司 | A kind of not bubbling road gap-grouting glue used under hot and humid environment and preparation method thereof |
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| CN108410412A (en) * | 2018-03-28 | 2018-08-17 | 陈太师 | A kind of rapid curing polyurethane water-proof fluid sealant and preparation method thereof |
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Application publication date: 20170714 |