CN114292611A - Environment-friendly water-based epoxy resin crack sealer with high weather resistance and preparation method thereof - Google Patents
Environment-friendly water-based epoxy resin crack sealer with high weather resistance and preparation method thereof Download PDFInfo
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- CN114292611A CN114292611A CN202111455010.0A CN202111455010A CN114292611A CN 114292611 A CN114292611 A CN 114292611A CN 202111455010 A CN202111455010 A CN 202111455010A CN 114292611 A CN114292611 A CN 114292611A
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- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 88
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- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 47
- 239000004593 Epoxy Substances 0.000 claims abstract description 32
- 239000013008 thixotropic agent Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 15
- 239000011347 resin Substances 0.000 claims abstract description 15
- 239000000049 pigment Substances 0.000 claims abstract description 11
- 230000004048 modification Effects 0.000 claims abstract description 5
- 238000012986 modification Methods 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 4
- 230000003449 preventive effect Effects 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 14
- 229920000570 polyether Polymers 0.000 claims description 14
- 239000003054 catalyst Substances 0.000 claims description 12
- 239000003242 anti bacterial agent Substances 0.000 claims description 11
- 239000002518 antifoaming agent Substances 0.000 claims description 11
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical group OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 10
- -1 1, 3-bis-aminopropyl-5, 5-dimethylhydantoin Chemical compound 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 9
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Chemical compound FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 6
- 229910021485 fumed silica Inorganic materials 0.000 claims description 6
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229920001577 copolymer Polymers 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 229960004889 salicylic acid Drugs 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000001228 spectrum Methods 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 4
- 229910000278 bentonite Inorganic materials 0.000 claims description 4
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 4
- QIJIUJYANDSEKG-UHFFFAOYSA-N 2,4,4-trimethylpentan-2-amine Chemical compound CC(C)(C)CC(C)(C)N QIJIUJYANDSEKG-UHFFFAOYSA-N 0.000 claims description 3
- 229910015900 BF3 Inorganic materials 0.000 claims description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- XFUOBHWPTSIEOV-UHFFFAOYSA-N bis(oxiran-2-ylmethyl) cyclohexane-1,2-dicarboxylate Chemical compound C1CCCC(C(=O)OCC2OC2)C1C(=O)OCC1CO1 XFUOBHWPTSIEOV-UHFFFAOYSA-N 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 239000004408 titanium dioxide Substances 0.000 claims description 3
- KYUGRJLPPCDMOH-UHFFFAOYSA-N 6-(7-oxabicyclo[4.1.0]heptan-3-ylmethoxy)-6-oxohexanoic acid Chemical compound C1C(COC(=O)CCCCC(=O)O)CCC2OC21 KYUGRJLPPCDMOH-UHFFFAOYSA-N 0.000 claims description 2
- 239000009261 D 400 Substances 0.000 claims description 2
- SVYKKECYCPFKGB-UHFFFAOYSA-N N,N-dimethylcyclohexylamine Chemical compound CN(C)C1CCCCC1 SVYKKECYCPFKGB-UHFFFAOYSA-N 0.000 claims description 2
- IMUDHTPIFIBORV-UHFFFAOYSA-N aminoethylpiperazine Chemical compound NCCN1CCNCC1 IMUDHTPIFIBORV-UHFFFAOYSA-N 0.000 claims description 2
- RUNBDQGENXJZOO-UHFFFAOYSA-N bis(oxiran-2-ylmethyl) 7-oxabicyclo[4.1.0]hept-5-ene-3,4-dicarboxylate Chemical compound C1C2OC2=CC(C(=O)OCC2OC2)C1C(=O)OCC1CO1 RUNBDQGENXJZOO-UHFFFAOYSA-N 0.000 claims description 2
- 239000004332 silver Substances 0.000 claims description 2
- 229910052709 silver Inorganic materials 0.000 claims description 2
- 229910021536 Zeolite Inorganic materials 0.000 claims 2
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims 2
- 239000010457 zeolite Substances 0.000 claims 2
- YXALYBMHAYZKAP-UHFFFAOYSA-N 7-oxabicyclo[4.1.0]heptan-4-ylmethyl 7-oxabicyclo[4.1.0]heptane-4-carboxylate Chemical compound C1CC2OC2CC1C(=O)OCC1CC2OC2CC1 YXALYBMHAYZKAP-UHFFFAOYSA-N 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 125000001931 aliphatic group Chemical group 0.000 abstract description 3
- 239000007787 solid Substances 0.000 abstract description 3
- 239000004844 aliphatic epoxy resin Substances 0.000 abstract description 2
- 150000001412 amines Chemical class 0.000 abstract description 2
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- 239000012855 volatile organic compound Substances 0.000 abstract 2
- WVDDGKGOMKODPV-UHFFFAOYSA-N Benzyl alcohol Chemical compound OCC1=CC=CC=C1 WVDDGKGOMKODPV-UHFFFAOYSA-N 0.000 description 6
- 239000000839 emulsion Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
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- 235000019445 benzyl alcohol Nutrition 0.000 description 2
- 239000003085 diluting agent Substances 0.000 description 2
- DZIHTWJGPDVSGE-UHFFFAOYSA-N 4-[(4-aminocyclohexyl)methyl]cyclohexan-1-amine Chemical compound C1CC(N)CCC1CC1CCC(N)CC1 DZIHTWJGPDVSGE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
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- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
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- 239000012752 auxiliary agent Substances 0.000 description 1
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- 239000004568 cement Substances 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- GEQHKFFSPGPGLN-UHFFFAOYSA-N cyclohexane-1,3-diamine Chemical compound NC1CCCC(N)C1 GEQHKFFSPGPGLN-UHFFFAOYSA-N 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
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- 238000002474 experimental method Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- WNLRTRBMVRJNCN-UHFFFAOYSA-N hexanedioic acid Natural products OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses an environment-friendly water-based epoxy resin crack sealer with high weather resistance, which comprises the following components in percentage by mass: 42% of epoxy resin, 4-6% of waterborne modified epoxy resin, 2-4% of thixotropic agent, 33-40% of curing agent, 0.2-0.4% of curing accelerator and 7-10% of pigment; 0.2 to 0.6 percent of mildew preventive. The invention also discloses a preparation method of the crack sealer, which comprises the following steps: s1: waterborne modification of epoxy resin, S2: preparing a component A of the waterborne epoxy resin crack sealer, and carrying out S3: preparing a component B of the waterborne epoxy resin crack sealer, and carrying out S4: obtaining the waterborne epoxy crack sealer resin. According to the invention, organic amines with 100% of solid content are used as curing agents, so that the problems of odor and VOC (volatile organic compounds) emission of the epoxy resin crack sealing agent are solved; the product of the invention has more environmental protection property by modifying the epoxy resin in a water-based way; the modified aliphatic epoxy resin is used as a main body bonding material and an aliphatic curing agent, so that the weather resistance of the epoxy crack sealer is greatly improved.
Description
Technical Field
The invention relates to the field of coating adhesives, in particular to an environment-friendly water-based epoxy resin crack sealer with high weather resistance and a preparation method thereof.
Background
The epoxy resin seam beautifying agent is an upgraded product of a joint mixture and mainly comprises epoxy resin, a curing agent, pigment fillers, an auxiliary agent and the like. Compared with the defects of poor toughness, easy moisture absorption, poor stain resistance and poor mildew resistance and antibacterial property of the cement-based ceramic tile crack sealer, the cured epoxy resin crack sealer has the advantages of good flexibility, wear resistance, acid and alkali resistance, no shrinkage, water resistance, mildew resistance and the like; moreover, the epoxy resin seam beautifying agent is more popular in the home decoration market because the construction is convenient and no professional equipment or construction team is needed.
Chinese patent CN201610386973.2 proposes a preparation method of a bi-component epoxy seam beautifying agent, and the product has good mildew and water resistance, high glossiness and long retention time; solves the defects that the traditional caulking agent materials adopting high molecular polymer emulsion, gypsum and the like have poor mildew-proof and antibacterial properties and are not suitable for humid indoor environments such as kitchens and the like. However, the high-boiling benzyl alcohol solvent is adopted as the diluent in the patent, so that the production cost of the crack sealing agent is increased, and the VOC emission problem is generated in the construction and use process.
Chinese patent CN201710859132.3 mentions a preparation method using water-based epoxy emulsion as main resin of seam beautifying agent, and although the problem of VOC emission of oily seam beautifying agent and benzyl alcohol diluent is solved by using water-based epoxy emulsion as main resin, the solid content of epoxy resin emulsion is low (50-69%), the curing is slow, and the seam beautifying agent is easy to collapse after water evaporation and curing.
Disclosure of Invention
The invention aims to provide an environment-friendly water-based epoxy resin crack sealer with high weather resistance and a preparation method thereof, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following components in percentage by mass: 42% of epoxy resin, 4-6% of waterborne modified epoxy resin, 2-4% of thixotropic agent, 33-40% of curing agent, 0.2-0.4% of curing accelerator and 7-10% of pigment; 0.2 to 0.6 percent of mildew preventive;
the waterborne modified epoxy resin comprises the following components in percentage by mass: 60-70% of substance containing polyether chain segment, 30% of epoxy resin, 0.6-0.9% of catalyst and 0.3-0.5% of defoaming agent.
Preferably, the substance containing polyether chain segment is polyethylene glycol or Hensmeipolyetheramine
M-600、
M-1000、
One or two mixtures of M-2070; the epoxy resin is one or a mixture of two of 3, 4-epoxy cyclohexyl methyl formate-3, 4-epoxy cyclohexyl methyl ester, adipic acid bis-3, 4-epoxy cyclohexyl methyl ester, 4, 5-epoxy tetrahydro phthalic acid diglycidyl ester and cyclohexane-1, 2-dicarboxylic acid diglycidyl ester.
Preferably, the catalyst is one of boron trifluoride complex, tert-octylamine and triphenylphosphine, and the thixotropic agent is one of fumed silica and bentonite.
Preferably, the curing accelerator is salicylic acid, and the pigment is one of titanium dioxide, noble silver and gold-plating powder.
Preferably, the curing agent is one or a mixture of two of 1, 3-cyclohexyldimethylamine, 4-diaminodicyclohexylmethane, 1, 3-bis-aminopropyl-5, 5-dimethylhydantoin, N-aminoethyl piperazine, polyetheramine D-220, polyetheramine D-400 and polyetheramine D-205.
Preferably, the defoaming agent is polyether segment modified grafted silicon ether copolymer,
a preparation method of an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following steps:
s1: performing waterborne modification on epoxy resin, namely adding a substance containing a polyether chain segment and the epoxy resin into a four-neck flask respectively, adding a catalyst and an inorganic antibacterial agent, heating to 100-130 ℃, then heating to 130 ℃, and performing heat preservation reaction for 2-5 h; monitoring the epoxy equivalent value in the reaction system by a spectrum analyzer, cooling to stop the reaction until the epoxy equivalent value in the system is not changed any more, and discharging when the temperature is reduced to 40-50 ℃ to obtain the waterborne modified epoxy resin;
s2: preparing a component A of the waterborne epoxy resin crack sealer, taking 42g of epoxy resin, adding 6g of waterborne modified epoxy resin synthesized in the step S1, and stirring and dispersing at 2000rpm for 20-30 min; taking out, adding 2g of thixotropic agent into the system, and continuously stirring for 10 minutes under the condition of rotating speed of 1000rpm of 800-;
s3: preparing a component B of the waterborne epoxy resin crack sealer, taking 40g of curing agent, adding 0.2-0.4g of curing accelerator, 2-4g of thixotropic agent and 0.2-0.5g of inorganic antibacterial agent, and stirring and dispersing for 5min at the rotating speed of 800rpm to ensure that the thixotropic agent is uniformly dispersed in the curing agent. Taking out, adding 7-10g of pigment into the system, continuing stirring for 10min to uniformly disperse the powder, and taking out to obtain a curing agent component B;
s4: obtaining water-based epoxy seam beautifying agent resin, wherein A, B components of the water-based epoxy seam beautifying agent resin are mixed according to the mass ratio of 1: 1 proportion, and the mixture is filled into a bi-component rubber tube to obtain the final bi-component epoxy crack sealer product.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts organic amine with 100 percent of solid content as the curing agent, thereby overcoming the environmental protection risk caused by diluting the reaction system with organic solvent in the market; and secondly, the product of the invention has more environmental protection property by modifying the epoxy resin in a water-based way. Finally, different from the E51 epoxy resin commonly used in the market as the film-forming resin, the modified aliphatic epoxy resin is adopted as the main body bonding material, so that the defect of poor weather resistance of the E51 resin is overcome, and the weather resistance of the epoxy crack sealer is greatly improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a technical scheme that: an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following components in percentage by mass: 42% of epoxy resin, 6% of waterborne modified epoxy resin, 2% of thixotropic agent, 40% of curing agent, 0.4% of curing accelerator and 9% of pigment; 0.6 percent of inorganic antibacterial agent;
the waterborne modified epoxy resin comprises the following components in percentage by mass: 69% of a substance containing a polyether chain segment, 30% of epoxy resin, 0.6% of a catalyst and 0.4% of a defoaming agent;
a preparation method of an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following steps:
s1: carrying out waterborne modification on epoxy resin, namely adding 69g of polyethylene glycol, 30g of 3, 4-epoxy cyclohexyl methyl 3, 4-epoxy cyclohexyl formate into a four-neck flask, adding 0.6g of tert-octylamine serving as a catalyst and 0.4g of polyether chain segment modified and grafted silicon ether copolymer serving as a defoaming agent, heating to 100 ℃, and carrying out heat preservation reaction for 2-5 hours; and monitoring the epoxy equivalent value in the reaction system by a spectrum analyzer until the epoxy equivalent value in the system is not changed any more, and cooling to stop the reaction. Cooling to 45 ℃, and discharging to obtain the waterborne modified epoxy resin;
s2: preparing a component A of the waterborne epoxy resin crack sealer, taking 42g of 3, 4-epoxy cyclohexyl formic acid-3, 4-epoxy cyclohexyl methyl ester, adding 6g of waterborne modified epoxy resin synthesized in the step S1, and stirring and dispersing at a high speed of 2000rpm for 20 min; taking out, adding 2g of fumed silica into the system, and continuously stirring for 10 minutes at the rotating speed of 800rpm to obtain a component A;
s3: preparing a component B of the water-based epoxy resin crack sealer, taking 40g of 4, 4-diaminodicyclohexylmethane, adding 0.4g of salicylic acid as a curing accelerator, 3g of fumed silica as a thixotropic agent, 0.6g of nano Ag as an inorganic antibacterial agent, and stirring and dispersing for about 5min at the rotating speed of 800rpm so that the thixotropic agent is uniformly dispersed in a curing agent. Taking out, adding 9g of titanium dioxide into the system, continuing stirring for 10min to uniformly disperse the powder, and taking out to obtain a curing agent component B;
s4: and (3) obtaining water-based epoxy seam beautifying agent resin, wherein 50 g of A, B components and A, B components of the water-based epoxy seam beautifying agent resin are respectively filled into a bi-component rubber tube, so that a final bi-component epoxy seam beautifying agent product can be obtained.
Example two
The invention provides a technical scheme that: an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following components in percentage by mass: 42% of epoxy resin, 6% of waterborne modified epoxy resin, 2% of thixotropic agent, 40% of curing agent, 0.4% of curing accelerator and 9% of pigment; 0.6 percent of inorganic antibacterial agent;
the waterborne modified epoxy resin comprises the following components in percentage by mass: 69% of a substance containing a polyether chain segment, 30% of epoxy resin, 0.6% of a catalyst and 0.4% of a defoaming agent;
a preparation method of an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following steps:
s1: the epoxy resin is modified by water, 60g of the epoxy resin is added into a four-neck flask respectively
M-2070 polyetheramine, 30g of 3, 4-epoxy cyclohexyl methyl formate-3, 4-epoxy cyclohexyl methyl ester, 0.6g of triphenylphosphine serving as a catalyst and 0.3g of polyether chain segment modified and grafted silicon ether copolymer serving as a defoaming agent are added, then the temperature is raised to 100 ℃, and the heat preservation reaction is carried out for 2 to 5 hours; and monitoring the epoxy equivalent value in the reaction system by a spectrum analyzer until the epoxy equivalent value in the system is not changed any more, and cooling to stop the reaction. Cooling to 45 ℃, and discharging to obtain the waterborne modified epoxy resin;
s2: preparing a component A of the waterborne epoxy resin crack sealer, taking 42g of bis 3, 4-epoxycyclohexylmethyl adipate, adding 6g of waterborne modified epoxy resin synthesized in the step S1, and stirring and dispersing at a high speed of 2000rpm for 20 min; taking out, adding 2g of bentonite into the system, and continuously stirring for 10 minutes at the rotating speed of 800rpm to obtain a component A;
s3: preparing a component B of the waterborne epoxy resin crack sealer, taking 40g of 1, 3-di-aminopropyl-5, 5-dimethyl hydantoin, adding 0.4g of salicylic acid as a curing accelerator, 3g of bentonite as a thixotropic agent, 0.6g of nano Ag as an inorganic antibacterial agent, and stirring and dispersing for about 5min at the rotating speed of 800rpm to ensure that the thixotropic agent is uniformly dispersed in the curing agent. Taking out, adding 9g of space ash into the system, continuing stirring for 10min to uniformly disperse the powder, and taking out to obtain a curing agent component B;
s4: and (3) obtaining water-based epoxy seam beautifying agent resin, wherein 50 g of A, B components and A, B components of the water-based epoxy seam beautifying agent resin are respectively filled into a bi-component rubber tube, so that a final bi-component epoxy seam beautifying agent product can be obtained.
EXAMPLE III
The invention provides a technical scheme that: an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following components in percentage by mass: 42% of epoxy resin, 6% of waterborne modified epoxy resin, 2% of thixotropic agent, 40% of curing agent, 0.4% of curing accelerator and 9% of pigment; 0.4 percent of inorganic antibacterial agent;
the waterborne modified epoxy resin comprises the following components in percentage by mass: 69% of a substance containing a polyether chain segment, 30% of epoxy resin, 0.6% of a catalyst and 0.4% of a defoaming agent;
a preparation method of an environment-friendly water-based epoxy resin crack sealer with high weather resistance comprises the following steps:
s1: the epoxy resin is modified by water, 60g of the epoxy resin is added into a four-neck flask respectively
M-1000 polyetheramine, 30g of hydrogenated epoxy resin, 0.6g of boron trifluoride complex serving as a catalyst and 0.3g of polyether chain segment modified and grafted silicon ether copolymer serving as a defoaming agent are added, then the temperature is raised to 100 ℃, and the heat preservation reaction is carried out for 2-5h; and monitoring the epoxy equivalent value in the reaction system by a spectrum analyzer until the epoxy equivalent value in the system is not changed any more, and cooling to stop the reaction. Cooling to 45 ℃, and discharging to obtain the waterborne modified epoxy resin;
s2: preparing a component A of the waterborne epoxy resin crack sealer, taking 42g of cyclohexane-1, 2-dicarboxylic acid diglycidyl ester, adding 6g of waterborne modified epoxy resin synthesized in the step S1, and stirring and dispersing at a high speed of 2000rpm for 20 min; taking out, adding 2g of fumed silica into the system, and continuously stirring for 10 minutes at the rotating speed of 800rpm to obtain a component A;
s3: preparing a component B of the waterborne epoxy resin crack sealer, taking 40g of a mixture of 1, 3-cyclohexanediamine and polyetheramine D220, adding 0.4g of salicylic acid serving as a curing accelerator, 3g of fumed silica serving as a thixotropic agent, 0.4g of nano Ag serving as an inorganic antibacterial agent, and stirring and dispersing for about 5min at the rotating speed of 800rpm to ensure that the thixotropic agent is uniformly dispersed in a curing agent. Taking out, adding 9g of gold-plating powder into the system, continuing stirring for 10min to uniformly disperse the powder, and taking out to obtain a curing agent B component;
s4: and (3) obtaining water-based epoxy seam beautifying agent resin, wherein 50 g of A, B components and A, B components of the water-based epoxy seam beautifying agent resin are respectively filled into a bi-component rubber tube, so that a final bi-component epoxy seam beautifying agent product can be obtained.
Through the comparative experiment of the four groups of examples, each group of examples can improve the weather resistance of the epoxy seam beautifying agent, and has environmental protection, wherein the weather resistance effect of the scheme of the third embodiment is the best.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The environment-friendly water-based epoxy resin crack sealer with high weather resistance is characterized by comprising the following components in percentage by mass: 42% of epoxy resin, 4-6% of waterborne modified epoxy resin, 2-4% of thixotropic agent, 33-40% of curing agent, 0.2-0.4% of curing accelerator and 7-10% of pigment; 0.2 to 0.6 percent of inorganic antibacterial agent;
the waterborne modified epoxy resin comprises the following components in percentage by mass: 60-70% of substance containing polyether chain segment, 30% of epoxy resin, 0.6-0.9% of catalyst and 0.3-0.5% of defoaming agent.
2. The environment-friendly water-based epoxy resin crack sealer with high weather resistance as claimed in claim 1, wherein: the material containing polyether chain segment is polyethylene glycol or Hensmeipolyetheramine
M-600、
M-1000、
M-2070, wherein the epoxy resin is one or a mixture of 3, 4-epoxycyclohexylmethyl 3, 4-epoxycyclohexylformate, bis 3, 4-epoxycyclohexylmethyl adipate, 4, 5-epoxytetrahydrophthalic acid diglycidyl ester and cyclohexane-1, 2-dicarboxylic acid diglycidyl ester.
3. The environment-friendly water-based epoxy resin crack sealer with high weather resistance as claimed in claim 1, wherein: the catalyst is one of boron trifluoride complex, tert-octylamine and triphenylphosphine, and the thixotropic agent is one of fumed silica and bentonite.
4. The environment-friendly water-based epoxy resin crack sealer with high weather resistance as claimed in claim 1, wherein: the curing accelerator is salicylic acid, and the pigment is one of titanium dioxide, noble silver and gold-plating powder.
5. The environment-friendly water-based epoxy resin crack sealer with high weather resistance as claimed in claim 1, wherein: the curing agent is one or a mixture of two of 1, 3-cyclohexyldimethylamine, 4-diaminodicyclohexylmethane, 1, 3-bis-aminopropyl-5, 5-dimethylhydantoin, N-aminoethyl piperazine, polyetheramine D-220, polyetheramine D-400 and polyetheramine D-205.
6. The environment-friendly water-based epoxy resin crack sealer with high weather resistance as claimed in claim 1, wherein: the defoaming agent is polyether chain segment modified and grafted silicon ether copolymer, and the mildew preventive and the inorganic antibacterial agent are one of nano Ag, nano ZnO, nano TiO2, zeolite-loaded Zn or zeolite-loaded Ag.
7. The preparation method of the environment-friendly water-based epoxy resin crack sealer with high weather resistance as claimed in claim 1, characterized by comprising the following steps:
s1: performing waterborne modification on epoxy resin, namely adding 60-70g of a substance containing a polyether chain segment and 30g of epoxy resin into a four-neck flask respectively, adding 0.6-0.9g of a catalyst and 0.3-0.5g of a defoaming agent, and performing heat preservation reaction for 2-5h when the temperature is raised to 100 ℃ and 130 ℃; monitoring the epoxy equivalent value in the reaction system by a spectrum analyzer, cooling to stop the reaction until the epoxy equivalent value in the system is not changed any more, and discharging when the temperature is reduced to 40-50 ℃ to obtain the waterborne modified epoxy resin;
s2: preparing a component A of the waterborne epoxy resin crack sealer, taking 42g of epoxy resin, adding 6g of waterborne modified epoxy resin synthesized in the step S1, and stirring and dispersing at 2000rpm for 20-30 min; taking out, adding 2g of thixotropic agent into the system, and continuously stirring for 10 minutes under the condition of rotating speed of 1000rpm of 800-;
s3: preparing a component B of the waterborne epoxy resin crack sealer, taking 40g of curing agent, adding 0.2-0.4g of curing accelerator, 2-4g of thixotropic agent and 0.2-0.5g of inorganic antibacterial agent, and stirring and dispersing for 5min at the rotating speed of 800rpm to ensure that the thixotropic agent is uniformly dispersed in the curing agent; taking out, adding 7-10g of pigment into the system, continuing stirring for 10min to uniformly disperse the powder, and taking out to obtain a curing agent component B;
s4: obtaining water-based epoxy seam beautifying agent resin, wherein A, B components of the water-based epoxy seam beautifying agent resin are mixed according to the mass ratio of 1: 1 proportion, and the mixture is filled into a bi-component rubber tube to obtain the final bi-component epoxy crack sealer product.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116285822A (en) * | 2023-04-06 | 2023-06-23 | 安徽牛元新材料有限公司 | Mildew-proof joint beautifying agent and preparation method thereof |
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| CN109777179A (en) * | 2017-11-13 | 2019-05-21 | 中国石油化工股份有限公司 | A kind of aqueous epoxy resins joint trimming agent and its preparation method and application |
| CN113185939A (en) * | 2021-06-07 | 2021-07-30 | 梅州市金诚防水材料有限公司 | Water-based crack sealer and preparation method thereof |
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Application publication date: 20220408 |