CN116948587A - Preparation and application of bi-component silane modified polyether sealant - Google Patents
Preparation and application of bi-component silane modified polyether sealant Download PDFInfo
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- CN116948587A CN116948587A CN202310970920.5A CN202310970920A CN116948587A CN 116948587 A CN116948587 A CN 116948587A CN 202310970920 A CN202310970920 A CN 202310970920A CN 116948587 A CN116948587 A CN 116948587A
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- modified polyether
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- 239000004526 silane-modified polyether Substances 0.000 title claims abstract description 68
- 239000000565 sealant Substances 0.000 title claims abstract description 60
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 23
- 229920005989 resin Polymers 0.000 claims abstract description 23
- 239000000945 filler Substances 0.000 claims abstract description 14
- 239000004014 plasticizer Substances 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 239000004611 light stabiliser Substances 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 239000007822 coupling agent Substances 0.000 claims abstract description 6
- 239000000049 pigment Substances 0.000 claims abstract description 6
- 239000012763 reinforcing filler Substances 0.000 claims abstract description 6
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 6
- 239000002516 radical scavenger Substances 0.000 claims abstract description 4
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 92
- 238000007599 discharging Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 18
- ZVFDTKUVRCTHQE-UHFFFAOYSA-N Diisodecyl phthalate Chemical compound CC(C)CCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC(C)C ZVFDTKUVRCTHQE-UHFFFAOYSA-N 0.000 claims description 17
- 238000002156 mixing Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 11
- JRBPAEWTRLWTQC-UHFFFAOYSA-N dodecylamine Chemical group CCCCCCCCCCCCN JRBPAEWTRLWTQC-UHFFFAOYSA-N 0.000 claims description 10
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 9
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 6
- 239000002250 absorbent Substances 0.000 claims description 5
- 230000002745 absorbent Effects 0.000 claims description 5
- HBGGXOJOCNVPFY-UHFFFAOYSA-N diisononyl phthalate Chemical compound CC(C)CCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCC(C)C HBGGXOJOCNVPFY-UHFFFAOYSA-N 0.000 claims description 3
- 229920001451 polypropylene glycol Polymers 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 2
- 230000003197 catalytic effect Effects 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- KSBAEPSJVUENNK-UHFFFAOYSA-L tin(ii) 2-ethylhexanoate Chemical compound [Sn+2].CCCCC(CC)C([O-])=O.CCCCC(CC)C([O-])=O KSBAEPSJVUENNK-UHFFFAOYSA-L 0.000 claims description 2
- 101000623895 Bos taurus Mucin-15 Proteins 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 50
- 229910000019 calcium carbonate Inorganic materials 0.000 description 25
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 24
- 238000001514 detection method Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 10
- 239000006229 carbon black Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 8
- OCWYEMOEOGEQAN-UHFFFAOYSA-N bumetrizole Chemical compound CC(C)(C)C1=CC(C)=CC(N2N=C3C=C(Cl)C=CC3=N2)=C1O OCWYEMOEOGEQAN-UHFFFAOYSA-N 0.000 description 8
- 238000001723 curing Methods 0.000 description 8
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical group CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 239000004408 titanium dioxide Substances 0.000 description 8
- 239000004952 Polyamide Substances 0.000 description 7
- 229920002647 polyamide Polymers 0.000 description 7
- 239000004567 concrete Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000009864 tensile test Methods 0.000 description 6
- 239000004588 polyurethane sealant Substances 0.000 description 5
- 239000005995 Aluminium silicate Substances 0.000 description 4
- 235000012211 aluminium silicate Nutrition 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 4
- 239000003566 sealing material Substances 0.000 description 4
- 125000005372 silanol group Chemical group 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000004590 silicone sealant Substances 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical group [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 125000003545 alkoxy group Chemical group 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229910021485 fumed silica Inorganic materials 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 239000004587 polysulfide sealant Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229920002725 thermoplastic elastomer Polymers 0.000 description 2
- 239000004636 vulcanized rubber Substances 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 description 1
- IYAZLDLPUNDVAG-UHFFFAOYSA-N 2-(benzotriazol-2-yl)-4-(2,4,4-trimethylpentan-2-yl)phenol Chemical compound CC(C)(C)CC(C)(C)C1=CC=C(O)C(N2N=C3C=CC=CC3=N2)=C1 IYAZLDLPUNDVAG-UHFFFAOYSA-N 0.000 description 1
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 description 1
- UWSMKYBKUPAEJQ-UHFFFAOYSA-N 5-Chloro-2-(3,5-di-tert-butyl-2-hydroxyphenyl)-2H-benzotriazole Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC(N2N=C3C=C(Cl)C=CC3=N2)=C1O UWSMKYBKUPAEJQ-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 229920005601 base polymer Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 1
- 125000003354 benzotriazolyl group Chemical group N1N=NC2=C1C=CC=C2* 0.000 description 1
- RSOILICUEWXSLA-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 RSOILICUEWXSLA-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004359 castor oil Substances 0.000 description 1
- 235000019438 castor oil Nutrition 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 125000001891 dimethoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 238000007541 indentation hardness test Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000013035 low temperature curing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013008 moisture curing Methods 0.000 description 1
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000009974 thixotropic effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
-
- 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
- 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
- C09J171/00—Adhesives based on polyethers obtained by reactions forming an ether link in the main chain; Adhesives based on derivatives of such polymers
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6801—Fillings therefor
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
- E04B1/68—Sealings of joints, e.g. expansion joints
- E04B1/6806—Waterstops
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The application discloses a preparation and application of a bi-component silane modified polyether sealant, and relates to the technical field of sealants, wherein the bi-component silane modified polyether sealant comprises a component A and a component B in a mass ratio of 10:1; the component A consists of the following components in parts by weight: the mass ratio of the silane modified polyether resin to the plasticizer component I to the thixotropic agent to the nanofiller component I to the reinforcing filler to the pigment and filler to the ultraviolet absorber to the light stabilizer to the water scavenger to the coupling agent is 90-110:70-100:1-5:150-300:0-30:5-20:0.5-2:0.5-2:0.5-1:1-5; the component B consists of the following components in parts by weight: the mass ratio of the nano filler component II to the plasticizer component II to the catalyst auxiliary agent is 15-50:10-40:1-5:0.5-1. The bi-component silane modified polyether sealant prepared by the application has excellent water resistance, weather resistance and mechanical property, fast curing, low modulus, simple and feasible preparation process, low production cost and excellent comprehensive performance.
Description
Technical Field
The application relates to the technical field of sealants, in particular to a preparation method and application of a bi-component silane modified polyether sealant.
Background
The sealant is a sealing material which deforms along with the shape of a sealing surface, is not easy to flow and has certain cohesiveness, is used for filling a configuration gap and has the sealing function, and has the functions of leakage prevention, water prevention, vibration prevention, sound insulation, heat insulation and the like.
Currently, the sealing materials on the market mainly comprise polysulfide sealant, polyurethane sealant and silicone sealant. Polysulfide sealants are increasingly eliminated due to the various problems of slow low temperature curing, poor durability, and the like; polyurethane sealants contain free isocyanate, and when cured, bubbles are easily formed, and the workability is poor and the polyurethane sealants are not resistant to high temperature, so that the polyurethane sealants are limited in many fields; the silicone sealant has poor adhesive strength, low tearing strength, poor coating property, easy oil precipitation of a glue layer, easy pollution to building materials and certain limitation on application.
The silane modified polyether sealant (MS sealant) is a high-performance environment-friendly sealant prepared by taking end-silane polyether (taking polyether as a main chain and end-capped by siloxane) as a base polymer. The curing mechanism of the MS sealant belongs to a moisture curing mechanism, under the existence of normal temperature, proper water vapor and a catalyst, alkoxy in a terminal silane group can rapidly react with water to generate silanol groups, and the silanol groups are mutually condensed to form a three-dimensional network structure.
The MS sealant is divided into a single component and a double component, the single component curing mainly depends on moisture in air, is obviously influenced by external environment, is cured from the outside to the inside, is slow in deep curing, has limited curing depth, and is not suitable for waterproof sealing of deep and wide joints. The outside and inside of the adhesive layer are cured simultaneously by utilizing the moisture contained in the adhesive layer during the dual-component curing, so that the curing rate is high, and the deep curing can be achieved. However, the existing MS sealant has weak bonding strength to concrete, poor bonding durability, easy fatigue debonding, poor weather resistance, weak bonding, falling off, cracking and other phenomena, and cannot effectively bond the concrete. Therefore, there is an urgent need in the art to develop a silane-modified polyether sealant with excellent combination of properties.
Disclosure of Invention
The application aims to provide a preparation method and application of a bi-component silane modified polyether sealant, which solve the following technical problems:
the existing silane modified polyether sealant has weak bonding strength to concrete, poor bonding durability, easy fatigue debonding, poor weather resistance, weak bonding, falling off, cracking and other phenomena, and cannot effectively bond the concrete.
The aim of the application can be achieved by the following technical scheme:
a preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding silane modified polyether resin, a plasticizer component I and a thixotropic agent into a mixer for stirring, then continuously adding a nano filler I, a reinforcing filler and a pigment filler, heating to 80-100 ℃, vacuumizing, stirring for 1-2 hours, cooling to 45 ℃, discharging vacuum, continuously adding an ultraviolet absorbent, a light stabilizer, a water removing agent and a coupling agent, continuously vacuumizing, stirring for 20-30 minutes, and controlling the stirring process through a stirring strategy to obtain a component A;
(2) Adding the second nano filler component and the second plasticizer component into a reactor, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding a catalyst and a catalytic auxiliary agent, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
As a further aspect of the application: in the step (1), the mass ratio of the silane modified polyether resin to the plasticizer component I to the thixotropic agent to the nanofiller component I to the reinforcing filler to the pigment and filler to the ultraviolet absorber to the light stabilizer to the water scavenger to the coupling agent is (90-110): (70-100): (1-5): (150-300): (0-30): (5-20): (0.5-2): (0.5-2): (0.5-1): (1-5).
As a further aspect of the application: in the step (2), the mass ratio of the second nano filler component to the second plasticizer component to the catalyst auxiliary agent is (15-50): (10-40): (1-5): (0.5-1).
As a further aspect of the application: the silane modified polyether resin is prepared by mixing any one or more of trimethoxy end capped silane modified polyether resin, dimethoxy end capped silane modified polyether resin, triethoxy end capped silane modified polyether resin and diethoxy end capped silane modified polyether resin in any ratio.
As a further aspect of the application: the plasticizer component I is prepared by mixing any one or more of diisodecyl phthalate, diisononyl phthalate and polypropylene glycol according to any ratio.
As a further aspect of the application: the thixotropic agent is prepared by mixing one or more of fumed silica, hydrogenated castor oil, organic bentonite and polyamide wax in any ratio.
As a further aspect of the application: the first nano filler component is prepared by mixing one or more of talcum powder, silicon micropowder, kaolin, nano calcium carbonate and heavy calcium carbonate in any ratio.
As a further aspect of the application: the reinforcing filler is prepared by mixing any one or more of carbon black, white carbon black and asphalt powder in any ratio.
As a further aspect of the application: the pigment and filler is rutile type titanium dioxide.
As a further aspect of the application: the ultraviolet absorbent is benzotriazole ultraviolet absorbent; the benzotriazole ultraviolet absorbent comprises any one of Tinuvin326, tinuvin327 and Tinuvin 329.
As a further aspect of the application: the light stabilizer is a hindered amine light stabilizer; the hindered amine light stabilizer comprises any one of Tinuvin770, tinuvin292 and Tinuvin5050 of Pasteur light stabilizer in Germany.
As a further aspect of the application: the water scavenger is vinyl trimethoxy silane or vinyl triethoxy silane.
As a further aspect of the application: the coupling agent is any one or more of 3-aminopropyl trimethoxy silane (KH 540), gamma-aminopropyl triethoxy silane (KH 550), gamma-glycidol ether oxypropyl trimethoxy silane (KH 560) and N- (beta-aminoethyl) -gamma-aminopropyl trimethoxy silane (KH 792) which are mixed according to any ratio.
As a further aspect of the application: the second nano filler component is any one or more of talcum powder, silicon micropowder, kaolin, nano calcium carbonate and heavy calcium carbonate which are mixed according to any ratio.
As a further aspect of the application: the plasticizer component II is one or more of diisodecyl phthalate, diisononyl phthalate and polypropylene glycol which are mixed according to any ratio.
As a further aspect of the application: the catalyst is prepared by mixing any one or more of dibutyl tin dilaurate, stannous octoate and chelated tin according to any ratio.
As a further aspect of the application: the catalyst auxiliary agent is dodecylamine,
as a further aspect of the application: the catalyst auxiliary agent is laurylamine.
As a further aspect of the application: the stirring strategy comprises the following specific steps:
s1, uniformly dividing a stirring box into five areas with the same area at the center and four corners, stirring the five areas by using a five-head stirring shaft for five minutes, standing for 1 minute, and shooting a stirred component picture by using a camera module to obtain a stirred component image T;
s2, dividing the component image into a plurality of image blocks with the same area, taking the image blocks at the four corners and the center of the image, and calculating the average chromaticity value of the image blocks to obtain (S) zx ,s zs ,s zy ,s ys ,s yx ) Wherein s is zx Average chroma value s for the image block in the lower left corner zs Average chroma value s for the top left image block zy Is the average chroma value, s, of the image block at the center ys Average chroma value, s, for the image block in the upper right corner yx The average chromaticity value of the image block in the upper right corner is obtained by extracting the detected chromaticity safety range of the finished product, and the value is set as (s min ,s max )；
S3, extracting the average chromaticity value of each image block and the finished chromaticity safety range, and leading the average chromaticity value and the finished chromaticity safety range into a uniform value calculation formula to calculate the uniform value, wherein the calculation formula of the uniform value is as follows:wherein s is m The value of (2) is +.>Comparing the calculated uniformity value with a uniformity threshold, if the calculated uniformity value is greater than or equal to the uniformity threshold, indicating that stirring is not uniform and continuous stirring is needed, and if the uniformity value is less than the uniformity threshold, indicating that stirring is uniform and continuous stirring is not needed;
s4, pair (S) zx ,s zs ,s zy ,s ys ,s yx ) Is not in(s) min ,s max ) Extracting the chromaticity position in the range to obtain S, stirring the components in S for 5min, and repeating the steps S1-S4 until the calculated uniformity value is smaller than the uniformity threshold.
The prepared bi-component silane modified polyether sealant is applied to the expansion joint of a building.
The application has the beneficial effects that:
(1) The bi-component silane modified polyether sealant prepared by the application has the advantages that the alkoxy in the resin end silane groups can react with water rapidly to generate silanol groups, the silanol groups are mutually condensed to form a three-dimensional network structure, the advantages of silicone sealant and polyurethane sealant are achieved, the weather resistance and durability are excellent, the water resistance and mechanical property are excellent, the curing speed is high, the modulus is low, the preparation process is simple and feasible, the production cost is low, the comprehensive performance is excellent, and the bi-component silane modified polyether sealant can be widely applied to bonding and sealing of various materials.
(2) The bi-component silane modified polyether sealant prepared by the application does not need priming coat, and has excellent bonding durability.
(3) The silane modified polyether sealant reaction system has good thixotropic property, and the base material is easy to dehydrate in the mixing process, so that the stability of the system is ensured. The ultraviolet absorber and the light stabilizer are added to ensure that the sealant has good protection effect, and can effectively improve the weather resistance of the system.
(4) According to the stirring method, the stirring box is uniformly divided into five areas of the center and the four corners by the stirring strategy, the average chromaticity value in the areas is calculated respectively, the concept of uniform value is introduced, the stirring box is divided into uniform values, the uniformity in the stirring process is effectively improved, the stirring efficiency is improved, and the influence of excessive stirring on the quality of materials is avoided.
Drawings
FIG. 1 is a schematic diagram showing the open time and the dry time broken lines of the sealants prepared in comparative example 1 and examples 1 to 6 of the present application;
FIG. 2 is a schematic diagram of broken lines of hardness and tensile strength of the sealants prepared in comparative example 1 and examples 1-6 of the present application;
FIG. 3 is a drawing of the tensile test 1 of the present application;
FIG. 4 is a drawing of the tensile test 2 of the present application;
FIG. 5 is a drawing of the tensile test 3 of the present application.
Detailed Description
The following description will clearly and fully describe the technical solutions of the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Comparative example 1
A preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding 100 parts by weight of silane modified polyether resin S810, 90 parts by weight of diisodecyl phthalate and 2 parts by weight of fumed silica into a double-planetary power mixer, stirring for 10-15min, then adding 115 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate and 5 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling the mixed material to below 45 ℃, discharging vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane and 4 parts by weight of KH550, vacuumizing, continuously stirring for 20-30min, cooling, discharging, and controlling the stirring process through a stirring strategy to obtain a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
Example 1
A preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding 100 parts by weight of silane modified polyether resin S810, 90 parts by weight of diisodecyl phthalate and 2 parts by weight of polyamide wax into a double planetary power mixer, stirring for 10-15min, then adding 115 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate and 5 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling the mixed material to below 45 ℃, discharging vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane and 4 parts by weight of KH550, vacuumizing, continuously stirring for 20-30min, cooling, discharging vacuum, and obtaining a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
Example 2
A preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding 100 parts by weight of silane modified polyether resin S810, 90 parts by weight of diisodecyl phthalate and 2 parts by weight of polyamide wax into a double planetary power mixer, stirring for 10-15min, then adding 205 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate and 5 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling the mixed material to below 45 ℃, discharging the vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane, 3 parts by weight of KH550 and 1 part by weight of KH792, vacuumizing, continuously stirring for 20-30min, cooling, discharging the vacuum, and obtaining a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
Example 3
A preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding 110 parts by weight of silane modified polyether resin S810, 100 parts by weight of diisodecyl phthalate and 2 parts by weight of polyamide wax into a double planetary power mixer, stirring for 10-15min, then adding 205 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate, 5 parts by weight of carbon black and 15 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling the mixture to below 45 ℃, discharging vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane, 3 parts by weight of KH550 and 1 part by weight of KH792, vacuumizing, continuing stirring for 20-30min, cooling, discharging vacuum, and obtaining a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
Example 4
A preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding 100 parts by weight of silane modified polyether resin S810, 90 parts by weight of diisodecyl phthalate and 5 parts by weight of polyamide wax into a double planetary power mixer, stirring for 10-15min, then adding 205 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate and 5 parts by weight of carbon black, 5 parts by weight of white carbon black and 5 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling the mixed material to below 45 ℃, discharging vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane, 3 parts by weight of KH550 and 1 part by weight of KH792, vacuumizing, continuously stirring for 20-30min, cooling, discharging vacuum, and obtaining a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
Example 5
A preparation method of a bi-component silane modified polyether sealant comprises the following steps:
(1) Adding 100 parts by weight of silane modified polyether resin S810, 90 parts by weight of diisodecyl phthalate and 5 parts by weight of polyamide wax into a double planetary power mixer, stirring for 10-15min, then adding 165 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate, 25 parts by weight of silica micropowder, 20 parts by weight of kaolin, 5 parts by weight of carbon black, 5 parts by weight of white carbon black and 5 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling to below 45 ℃, discharging vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane, 3 parts by weight of KH550 and 1 part by weight of KH792, vacuumizing, continuously stirring for 20-30min, cooling, discharging vacuum, and obtaining a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
Example 6
Example 6 a two-component silane modified polyether sealant was prepared using the stirring strategy proposed in the present application based on example 5:
(1) Adding 100 parts by weight of silane modified polyether resin S810, 90 parts by weight of diisodecyl phthalate and 5 parts by weight of polyamide wax into a double planetary power mixer, stirring for 10-15min, then adding 165 parts by weight of nano calcium carbonate, 50 parts by weight of heavy calcium carbonate, 25 parts by weight of silica micropowder, 20 parts by weight of kaolin, 5 parts by weight of carbon black, 5 parts by weight of white carbon black and 5 parts by weight of rutile type titanium dioxide, heating to 80-100 ℃, vacuumizing, stirring for 1-2h, cooling to below 45 ℃, discharging vacuum, adding 1 part by weight of Tinuvin326, 1 part by weight of Tinuvin770, 1 part by weight of vinyl trimethoxysilane, 3 parts by weight of KH550 and 1 part by weight of KH792, vacuumizing, continuously stirring for 20-30min, cooling, discharging vacuum, and obtaining a component A;
(2) Adding 16.4 parts by weight of diisodecyl phthalate and 30 parts by weight of heavy calcium carbonate into a double planetary power mixer, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding 3 parts by weight of dibutyltin dilaurate and 0.6 part by weight of laurylamine, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
The stirring strategy comprises the following specific steps:
s1, uniformly dividing a stirring box into five areas with the same area at the center and four corners, stirring the five areas by using a five-head stirring shaft for five minutes, standing for 1 minute, and shooting a stirred component picture by using a camera module to obtain a stirred component image T;
s2, dividing the component image into a plurality of image blocks with the same area, taking the image blocks at the four corners and the center of the image, and calculating the average chromaticity value of the image blocks to obtain (S) zx ,s zs ,s zy ,s ys ,s yx ) Wherein s is zx Average chroma value s for the image block in the lower left corner zs Average chroma value s for the top left image block zy Is the average chroma value, s, of the image block at the center ys Average chroma value, s, for the image block in the upper right corner yx Graph in upper right cornerThe average chromaticity value of the image block is extracted from the detected chromaticity safety range of the finished product, and is set as (s min ,s max )；
S3, extracting the average chromaticity value of each image block and the finished chromaticity safety range, and leading the average chromaticity value and the finished chromaticity safety range into a uniform value calculation formula to calculate the uniform value, wherein the calculation formula of the uniform value is as follows:wherein s is m The value of (2) is +.>Comparing the calculated uniformity value with a uniformity threshold, if the calculated uniformity value is greater than or equal to the uniformity threshold, indicating that stirring is not uniform and continuous stirring is needed, and if the uniformity value is less than the uniformity threshold, indicating that stirring is uniform and continuous stirring is not needed;
s4, pair (S) zx ,s zs ,s zy ,s ys ,s yx ) Is not in(s) min ,s max ) Extracting the chromaticity position in the range to obtain S, stirring the components in S for 5min, and repeating the steps S1-S4 until the calculated uniformity value is smaller than the uniformity threshold.
Specific examples of stirring strategies are presented below, we score 500 for expert in the art and then average to obtain an optimum value of 0.276 for the uniformity threshold, we extract the chromaticity safety range of the finished product, and the extraction result is (0.23-0.27), to obtain s m Is 0.25, for(s) zx ,s zs ,s zy ,s ys ,s yx ) We have found in one experiment that the value is (0.24,0.25,0.27,0.25,0.26), where the uniformity value is p=0.16, less than 0.276, so that stirring is uniform.
Performance detection
(1) Surface dry time, real dry time: the detection is carried out according to the standard of the national standard GB/T13477-1992 building sealing material test method, and the detection result is shown in Table 1;
(2) Hardness: according to the first part of the national standard GB/T531.1-2008 "vulcanized rubber or thermoplastic rubber indentation hardness test method: standard detection of Shore hardness (Shore hardness), and the detection result is shown in Table 1;
(3) Tensile strength and elongation at break: the detection is carried out according to the standard of national standard GB/T528-2009 "determination of tensile stress and strain properties of vulcanized rubber or thermoplastic rubber", and the detection result is shown in Table 1;
(4) Stretch-fixing adhesiveness: the detection is carried out according to JC/T881-2017 standard of sealing glue for concrete building joints, and the detection result is shown in Table 1;
(5) Tensile modulus: the detection is carried out according to JC/T881-2017 standard of sealing glue for concrete building joints, and the detection result is shown in Table 1;
(6) Elastic recovery rate: the detection results are shown in Table 1 according to the standard of national standard GB/T13477.17-2017 "determination of elastic recovery of the 17 th part of the building sealing Material test method".
Table 1: comparative examples and examples 1-6 Performance test data
According to the table, the surface drying time of the comparative example is more than 23% of the average value of the embodiment of the application, and the real drying time of the comparative example is more than 80% of the average value of the embodiment of the application, so that the bicomponent silane modified polyether sealant prepared by the preparation method provided by the embodiment of the application has the advantage of quick solidification;
as can be seen from the table above, the hardness, tensile strength, elongation at break, tensile modulus and elastic recovery rate of the comparative example are obviously smaller than those of the bicomponent silane modified polyether sealant prepared by the preparation method provided by the embodiment of the application, so that the bicomponent silane modified polyether sealant prepared by the preparation method provided by the embodiment of the application has the advantages of excellent weather resistance, durability and excellent water resistance and mechanical properties;
FIG. 1 is a schematic diagram showing the open time and the dry time broken lines of the sealants prepared in comparative example 1 and examples 1 to 6 of the present application;
FIG. 2 is a schematic diagram of broken lines of hardness and tensile strength of the sealants prepared in comparative example 1 and examples 1-6 of the present application;
as can be seen from Table 1 and FIGS. 1-5, most of the parameters of example 6 are better than those of examples 1-5, the uniformity of the surface in the stirring process is further effectively improved by the stirring strategy, the stirring efficiency is accelerated, the influence of excessive stirring on the quality of materials is avoided, and the performance of the sealant is effectively improved.
FIG. 3 is a drawing of the tensile test 1 of the present application;
FIG. 4 is a drawing of the tensile test 2 of the present application;
FIG. 5 is a drawing of the tensile test 3 of the present application.
From fig. 3 to 5, it can be seen that the bicomponent silane modified polyether sealant prepared by the preparation method provided by the embodiment of the application does not break when being stretched to a specified length, and the bicomponent silane modified polyether sealant prepared by the preparation method provided by the embodiment of the application has better extensibility.
The foregoing describes one embodiment of the present application in detail, but the description is only a preferred embodiment of the present application and should not be construed as limiting the scope of the application. All equivalent changes and modifications within the scope of the present application are intended to be covered by the present application.
Claims (9)
1. The preparation method of the bi-component silane modified polyether sealant is characterized by comprising the following steps of:
(1) Adding silane modified polyether resin, a plasticizer component I and a thixotropic agent into a mixer for stirring, then continuously adding a nano filler I, a reinforcing filler and a pigment filler, heating to 80-100 ℃, vacuumizing, stirring for 1-2 hours, cooling to 45 ℃, discharging vacuum, continuously adding an ultraviolet absorbent, a light stabilizer, a water removing agent and a coupling agent, continuously vacuumizing, stirring for 20-30 minutes, and controlling the stirring process through a stirring strategy to obtain a component A;
(2) Adding the second nano filler component and the second plasticizer component into a reactor, heating to 30-40 ℃, vacuumizing, stirring for 0.5-1h, discharging vacuum, adding a catalyst and a catalytic auxiliary agent, continuously vacuumizing, and stirring for 10-20min to obtain a component B;
(3) And uniformly mixing the component A and the component B according to the proportion of 10:1 to obtain the bi-component silane modified polyether sealant.
2. The preparation method of the two-component silane-modified polyether sealant according to claim 1, wherein in the step (1), the mass ratio of the silane-modified polyether resin to the plasticizer component I to the thixotropic agent to the nanofiller component I to the reinforcing filler to the pigment and filler to the ultraviolet absorber to the light stabilizer to the water scavenger to the coupling agent is (90-110): (70-100): (1-5): (150-300): (0-30): (5-20): (0.5-2): (0.5-2): (0.5-1): (1-5).
3. The preparation method of the two-component silane modified polyether sealant according to claim 1, wherein the mass ratio of the second nanofiller component to the second plasticizer component to the catalyst promoter in the step (2) is (15-50): (10-40): (1-5): (0.5-1).
4. The method for preparing the two-component silane-modified polyether sealant according to claim 1, wherein the silane-modified polyether resin is one or more of trimethoxy-terminated silane-modified polyether resin, dimethoxy-terminated silane-modified polyether resin, triethoxy-terminated silane-modified polyether resin and diethoxy-terminated silane-modified polyether resin.
5. The preparation method of the two-component silane modified polyether sealant according to claim 1, wherein the plasticizer component I is one or more of diisodecyl phthalate, diisononyl phthalate and polypropylene glycol which are mixed in any ratio.
6. The preparation method of the two-component silane modified polyether sealant according to claim 1, wherein the catalyst is prepared by mixing one or more of dibutyl tin dilaurate, stannous octoate or chelated tin in any ratio.
7. The method for preparing a two-component silane-modified polyether sealant according to claim 1, wherein the catalyst auxiliary agent is dodecylamine.
8. The method for preparing the two-component silane-modified polyether sealant according to claim 1, wherein the stirring strategy comprises the following specific steps:
s1, uniformly dividing a stirring box into five areas with the same area at the center and four corners, stirring the five areas by using a five-head stirring shaft for five minutes, standing for 1 minute, and shooting a stirred component picture by using a camera module to obtain a stirred component image T;
s2, dividing the component image into a plurality of image blocks with the same area, taking the image blocks at the four corners and the center of the image, and calculating the average chromaticity value of the image blocks to obtain (S) zx ,s zs ,s zy ,s ys ,s yx ) Wherein s is zx Average chroma value s for the image block in the lower left corner zs Average chroma value s for the top left image block zy Is the average chroma value, s, of the image block at the center ys Average chroma value, s, for the image block in the upper right corner yx The average chromaticity value of the image block in the upper right corner is obtained by extracting the detected chromaticity safety range of the finished product, and the value is set as (s min ,s max )；
S3, extracting the average chromaticity value of each image block and the finished chromaticity safety range, and leading the average chromaticity value and the finished chromaticity safety range into a uniform value calculation formula to calculate the uniform value, wherein the calculation formula of the uniform value is as follows:wherein s is m The value of (2) is +.>Comparing the calculated uniformity value with a uniformity threshold, if the calculated uniformity value is greater than or equal to the uniformity threshold, indicating that stirring is not uniform and continuous stirring is needed, and if the uniformity value is less than the uniformity threshold, indicating that stirring is uniform and continuous stirring is not needed;
s4, pair (S) zx ,s zs ,s zy ,s ys ,s yx ) Is not in(s) min ,s max ) Extracting the chromaticity position in the range to obtain S, stirring the components in S for 5min, and repeating the steps S1-S4 until the calculated uniformity value is smaller than the uniformity threshold.
9. Use of the two-component silane modified polyether sealant prepared according to claim 1 in a building expansion joint.
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