CN117229700A - Two-component coating composition - Google Patents
Two-component coating composition Download PDFInfo
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- CN117229700A CN117229700A CN202210643113.8A CN202210643113A CN117229700A CN 117229700 A CN117229700 A CN 117229700A CN 202210643113 A CN202210643113 A CN 202210643113A CN 117229700 A CN117229700 A CN 117229700A
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- coating composition
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- 239000008199 coating composition Substances 0.000 title claims abstract description 48
- 229920005862 polyol Polymers 0.000 claims abstract description 42
- 150000003077 polyols Chemical class 0.000 claims abstract description 42
- 239000000203 mixture Substances 0.000 claims abstract description 38
- 229920000642 polymer Polymers 0.000 claims abstract description 36
- 238000000576 coating method Methods 0.000 claims abstract description 28
- 239000005056 polyisocyanate Substances 0.000 claims abstract description 27
- 229920001228 polyisocyanate Polymers 0.000 claims abstract description 27
- 229920000805 Polyaspartic acid Polymers 0.000 claims abstract description 25
- 108010064470 polyaspartate Proteins 0.000 claims abstract description 25
- 150000002148 esters Chemical class 0.000 claims abstract description 24
- 239000011248 coating agent Substances 0.000 claims abstract description 23
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 claims abstract description 15
- 125000003277 amino group Chemical group 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 28
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 14
- 239000000758 substrate Substances 0.000 claims description 14
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 13
- 125000001931 aliphatic group Chemical group 0.000 claims description 11
- 239000000945 filler Substances 0.000 claims description 8
- 238000009736 wetting Methods 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 6
- 239000002516 radical scavenger Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- PCHXZXKMYCGVFA-UHFFFAOYSA-N 1,3-diazetidine-2,4-dione Chemical compound O=C1NC(=O)N1 PCHXZXKMYCGVFA-UHFFFAOYSA-N 0.000 claims description 5
- 125000005442 diisocyanate group Chemical group 0.000 claims description 5
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 5
- AVWRKZWQTYIKIY-UHFFFAOYSA-N urea-1-carboxylic acid Chemical compound NC(=O)NC(O)=O AVWRKZWQTYIKIY-UHFFFAOYSA-N 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- ZFSLODLOARCGLH-UHFFFAOYSA-N isocyanuric acid Chemical compound OC1=NC(O)=NC(O)=N1 ZFSLODLOARCGLH-UHFFFAOYSA-N 0.000 claims description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 3
- 239000013530 defoamer Substances 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 3
- 239000011247 coating layer Substances 0.000 claims description 2
- 239000002671 adjuvant Substances 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 3
- 239000007787 solid Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 7
- 239000000178 monomer Substances 0.000 description 7
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 6
- 229920005906 polyester polyol Polymers 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- -1 acrylic ester Chemical class 0.000 description 5
- 229920002635 polyurethane Polymers 0.000 description 5
- 239000004814 polyurethane Substances 0.000 description 5
- 239000008177 pharmaceutical agent Substances 0.000 description 4
- 229920001223 polyethylene glycol Polymers 0.000 description 4
- 239000002202 Polyethylene glycol Substances 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000012948 isocyanate Substances 0.000 description 3
- 150000002513 isocyanates Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- 239000013638 trimer Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 2
- 229920005628 alkoxylated polyol Polymers 0.000 description 2
- 238000001723 curing Methods 0.000 description 2
- JYGXADMDTFJGBT-VWUMJDOOSA-N hydrocortisone Chemical compound O=C1CC[C@]2(C)[C@H]3[C@@H](O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 JYGXADMDTFJGBT-VWUMJDOOSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002808 molecular sieve Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000011527 polyurethane coating Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000008313 sensitization Effects 0.000 description 2
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- FKTHNVSLHLHISI-UHFFFAOYSA-N 1,2-bis(isocyanatomethyl)benzene Chemical class O=C=NCC1=CC=CC=C1CN=C=O FKTHNVSLHLHISI-UHFFFAOYSA-N 0.000 description 1
- AZYRZNIYJDKRHO-UHFFFAOYSA-N 1,3-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=CC(C(C)(C)N=C=O)=C1 AZYRZNIYJDKRHO-UHFFFAOYSA-N 0.000 description 1
- RTTZISZSHSCFRH-UHFFFAOYSA-N 1,3-bis(isocyanatomethyl)benzene Chemical compound O=C=NCC1=CC=CC(CN=C=O)=C1 RTTZISZSHSCFRH-UHFFFAOYSA-N 0.000 description 1
- 239000005059 1,4-Cyclohexyldiisocyanate Substances 0.000 description 1
- AGJCSCSSMFRMFQ-UHFFFAOYSA-N 1,4-bis(2-isocyanatopropan-2-yl)benzene Chemical compound O=C=NC(C)(C)C1=CC=C(C(C)(C)N=C=O)C=C1 AGJCSCSSMFRMFQ-UHFFFAOYSA-N 0.000 description 1
- ALQLPWJFHRMHIU-UHFFFAOYSA-N 1,4-diisocyanatobenzene Chemical compound O=C=NC1=CC=C(N=C=O)C=C1 ALQLPWJFHRMHIU-UHFFFAOYSA-N 0.000 description 1
- CDMDQYCEEKCBGR-UHFFFAOYSA-N 1,4-diisocyanatocyclohexane Chemical compound O=C=NC1CCC(N=C=O)CC1 CDMDQYCEEKCBGR-UHFFFAOYSA-N 0.000 description 1
- DFPJRUKWEPYFJT-UHFFFAOYSA-N 1,5-diisocyanatopentane Chemical compound O=C=NCCCCCN=C=O DFPJRUKWEPYFJT-UHFFFAOYSA-N 0.000 description 1
- QLOQTKGUQKAAAB-UHFFFAOYSA-N 1-isocyanato-2-(2-isocyanatoethoxy)ethane Chemical compound O=C=NCCOCCN=C=O QLOQTKGUQKAAAB-UHFFFAOYSA-N 0.000 description 1
- 241001507943 Cormus Species 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000004472 Lysine Substances 0.000 description 1
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920000604 Polyethylene Glycol 200 Polymers 0.000 description 1
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 1
- 229920002582 Polyethylene Glycol 600 Polymers 0.000 description 1
- KXBFLNPZHXDQLV-UHFFFAOYSA-N [cyclohexyl(diisocyanato)methyl]cyclohexane Chemical compound C1CCCCC1C(N=C=O)(N=C=O)C1CCCCC1 KXBFLNPZHXDQLV-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002969 artificial stone Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- JGCWKVKYRNXTMD-UHFFFAOYSA-N bicyclo[2.2.1]heptane;isocyanic acid Chemical compound N=C=O.N=C=O.C1CC2CCC1C2 JGCWKVKYRNXTMD-UHFFFAOYSA-N 0.000 description 1
- DZYFUUQMKQBVBY-UHFFFAOYSA-N bis(2-isocyanatoethyl) carbonate Chemical compound O=C=NCCOC(=O)OCCN=C=O DZYFUUQMKQBVBY-UHFFFAOYSA-N 0.000 description 1
- CDQSJQSWAWPGKG-UHFFFAOYSA-N butane-1,1-diol Chemical compound CCCC(O)O CDQSJQSWAWPGKG-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000007766 curtain coating Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
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- 229960000890 hydrocortisone Drugs 0.000 description 1
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- 239000004615 ingredient Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004579 marble Substances 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
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- 239000011707 mineral Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- JLFNLZLINWHATN-UHFFFAOYSA-N pentaethylene glycol Chemical compound OCCOCCOCCOCCOCCO JLFNLZLINWHATN-UHFFFAOYSA-N 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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- 210000003813 thumb Anatomy 0.000 description 1
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Landscapes
- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
Abstract
The present invention relates to a two-component coating composition, a method of coating and application of the composition, and a product coated using the coating composition. The coating composition comprises an A component and a B component, wherein the A component comprises polyaspartic acid ester, polymer polyol and auxiliary agent, the B component comprises polyisocyanate, and the molar ratio of isocyanate groups to amino groups of the composition is 0.2-5. The two-component coating composition provided by the invention has the advantages of long pot life, long construction time, short walkable time and high hardness.
Description
Technical Field
The present invention relates to a two-component coating composition, a coating method and application of the coating composition, and a product coated with the coating composition.
Background
With the continuous low number of workers in the construction industry, the construction industry faces the problem of labor shortage, which makes the construction market including the construction terrace market urgent to need new technology capable of improving construction efficiency to compensate the problem caused by labor shortage.
The existing technical system capable of meeting the requirement of high construction efficiency in the building terrace market is only a methyl methacrylate system. The system initiates the polymerization of the active monomer by the initiator and has very high reaction speed. Compared with the traditional epoxy and polyurethane systems, the construction time can be effectively shortened, and the effect of improving the construction efficiency is achieved. However, the methyl methacrylate system has obvious problems in terms of safety and environment, such as the odor of the reactive monomer and the sensitization.
CN111655805a discloses polyester polyols for use in low VOC polyurethane compositions. The polyester polyol is the reaction product of at least one aliphatic polycarboxylic acid, at least one alkoxylated polyol having a functionality of 2 or more, and one or more polyols other than the alkoxylated polyol. The polyester polyols can be formulated into polyurethane compositions to obtain polyurethanes having low VOC content.
CN110746877B provides a photo-curing polyurethane coating, a preparation method and application thereof. The coating consists of the following raw material components: the component A comprises the following components in parts by weight: 60-80 parts of polyurethane acrylic ester, 10-20 parts of reactive monomer diluent, 1-20 parts of amino resin, 0.05-10 parts of pigment and 10-30 parts of filler; the component B comprises the following components in parts by weight: 40-100 parts of isocyanate and 40-100 parts of polyol; the component C is a photoinitiator. After the photocuring polyurethane coating is cured, a compact pore-free elastic coating film with high mechanical strength, heat resistance, cold resistance, corrosion resistance and ageing resistance can be formed.
CN109843952 discloses a polyisocyanate composition comprising a low viscosity isocyanate and a polyol. The polyisocyanate has the characteristics of low viscosity, quick drying property and excellent solubility in low-polarity organic solvents.
CN110418824 provides a polyaspartic acid coating composition comprising an aspartic ester compound and a polyisocyanate composition comprising a polyisocyanate derived from 1 or more than 2 diisocyanates selected from the group consisting of aliphatic and/or alicyclic diisocyanates.
Disclosure of Invention
The invention aims to provide a two-component coating composition, a coating method and application of the coating composition, and a product obtained by coating with the coating composition.
A two-part coating composition according to the present invention comprises an a-part and a B-part, the a-part comprising:
a) A polyaspartic acid ester having a viscosity of 900 mPas to 2000 mPas, the viscosity test being in accordance with DIN53019;
b) A polymer polyol having a molecular weight of 250g/mol to 420 g/mol;
c) An auxiliary agent;
the polyaspartic acid ester has a structure of formula I:
wherein R is 1 And R is 2 Each independently selected from methyl, ethyl or butyl;
the amount of the polymer polyol is 0.15 wt% to 0.35 wt%, the sum of the weight of the polyaspartic acid ester and the polymer polyol is 40 wt% to 97 wt%, the amounts being relative to the total weight of the a-component;
the component B comprises a polyisocyanate which is an uretdione, allophanate, isocyanurate or a mixture thereof polymerized on the basis of aliphatic and/or cycloaliphatic diisocyanates and has a viscosity of 80 to 580 mpa.s, a viscosity test according to DIN EN ISO 3219/A.3, a test temperature of 23℃and a shear rate of 10s -1 The rotor selects MV-DIN; the composition has a molar ratio of isocyanate groups to amine groups of 0.2 to 5.
According to one aspect of the present invention there is provided the use of a coating composition according to the present invention for protecting a substrate surface or a substrate surface coating.
According to yet another aspect of the present invention, there is provided a coating method comprising the steps of: the coating composition provided according to the present invention is applied to a substrate surface, and then cured and dried.
According to a further aspect of the present invention there is provided a coated product comprising a substrate and a coating layer formed by applying a coating composition provided according to the present invention to the substrate, curing and drying.
The double-component coating composition has high hardness, and also has the characteristics of long pot life, long construction time and short walking time on the premise of meeting the construction requirement of one-time thick coating (the thickness of a dry film reaches 2 mm), thereby being beneficial to improving the coating construction efficiency.
In addition, the bi-component coating composition is a solvent-free bi-component polyaspartic acid ester coating, can solve the problems of large smell and high sensitization of the existing coating, and is a safe and environmentally-friendly and occupational health-friendly coating.
Detailed Description
The invention provides a two-component coating composition comprising an A component and a B component, the A component comprising: a) A polyaspartic acid ester having a viscosity of 900 mPas to 2000 mPas, the viscosity test being in accordance with DIN53019; b) A polymer polyol having a molecular weight of 250g/mol to 420 g/mol; and c) an auxiliary agent; the polyaspartic acid ester has a structure of formula I:
wherein R is 1 And R is 2 Each independently selected from methyl, ethyl or butyl; the amount of the polymer polyol is 0.15 wt% to 0.35 wt%, the sum of the weight of the polyaspartic acid ester and the polymer polyol is 40 wt% to 97 wt%, the amounts being relative to the total weight of the a-component; the component B comprises a polyisocyanate which is an uretdione, allophanate, isocyanurate or a mixture thereof polymerized on the basis of aliphatic and/or cycloaliphatic diisocyanates, the polyisocyanate having a viscosity of 80mPa.s to 580 mPa.s, the viscosity test being in accordance with DIN EN ISO 3219/A.3, the test temperature being 23℃and the shear rate being 10s -1 The rotor selects MV-DIN; the composition has a molar ratio of isocyanate groups to amine groups of 0.2 to 5. The invention also provides the two-component coating compositionAnd the use of the coating composition to coat the resulting product.
The term two-component coating composition as described herein refers to a coating composition comprising at least two components that must be stored in separate containers due to their mutual reactivity. When the two separate components are mixed and applied to a substrate, the mutually reactive compounds in the two components react to crosslink and form a cured coating.
The term "curing, drying" as used herein refers to the process of a liquid coating composition from a liquid to a cured state.
The solid content of the dispersion according to the invention refers to the content of the solid component of the dispersion or of the active component of the dispersion.
Two-component coating composition
The molar ratio of isocyanate groups to amine groups of the composition is preferably 1 to 1.5.
The two-component coating composition has an organic solvent content of less than 60g/L. The two-component coating composition is most preferably a solvent-free two-component coating composition.
A component
The weight of the polyaspartic acid ester and polymer polyol and preferably 40 wt% to 90 wt%, most preferably 40 wt% to 46 wt%, all relative to the total weight of the a-component.
Polyaspartic acid ester a)
The R is 1 And R is 2 Each independently most preferably ethyl.
The polyaspartic acid esters preferably have an amine number of 150mg KOH/g to 250mg KOH/g, according to 2011-0605401-05D.
The amino equivalent of the polyaspartic acid ester is preferably 200-300.
The solids content of the polyaspartic acid ester is preferably 100% by weight.
Polymer polyol b)
The molecular weight of the polymer polyol is preferably 320g/mol to 420g/mol.
The molecular weight is calculated by: molecular weight=56.1×1000×f/(hydroxyl number of polymer polyol+acid number of polymer polyol), where 56.1 is molecular weight of KOH and f is functionality of polymer polyol.
Hydroxyl number of polymer polyol = hydroxyl content of polymer polyol x 100 x 33, hydroxyl content of polymer polyol was determined according to DIN53 240/2. The acid number of the polymer polyol is determined according to DIN EN ISO 2114 standard.
The solids content of the polymer polyol is preferably 100% by weight.
The hydroxyl functionality of the polymer polyol is preferably not less than 2, most preferably 2-3.
The hydroxyl group content of the polymer polyol is preferably 8 wt% to 16 wt% relative to the total weight of the polymer polyol.
The amount of the polymer polyol is preferably 0.2 wt% to 0.3 wt% relative to the total weight of the a component.
The polymer polyol is preferably one or more of the following: polyester polyols and polyethylene glycols.
Auxiliary agent
The auxiliaries preferably comprise a surface auxiliary, an optional pigment filler and an optional water scavenger.
The surface-aid is preferably one or more of the following: wetting dispersant, defoamer and wetting leveling agent.
The amount of the surface auxiliary is preferably 0.1 wt% to 3 wt% relative to the total weight of the a component.
The wetting dispersant is preferably BYK111 manufactured by Pick chemical company, germany.
The defoamer is preferably BYK1799 from Pick chemical company, germany.
The wetting and leveling agent is preferably BYK320 manufactured by Pick chemical company, germany.
The pigment and filler is preferably a mixture of barium sulfate and titanium dioxide.
The titanium dioxide is preferably rutile titanium dioxide R706 produced by America Corp.
The barium sulfate is preferably 6000-mesh barium sulfate produced by Shahalibut, germany.
The water scavenger is preferably SYLOSIV A4 molecular sieve manufactured by Graves corporation of America.
The pigment filler preferably does not exceed 60 wt%, most preferably 35 wt% to 45 wt%, relative to the total weight of the a component.
The water scavenger is preferably not more than 10% by weight, most preferably 4% to 6% by weight, relative to the total weight of the a component.
Component B
The polyisocyanate contained in the component B can be one polyisocyanate or a mixture of polyisocyanates.
The polyisocyanates are preferably based on uretdiones, allophanates, isocyanurates or mixtures thereof polymerized from aliphatic and/or cycloaliphatic diisocyanates.
The aliphatic diisocyanate is preferably one or more of the following: hexamethylene Diisocyanate (HDI), 2-dimethylpentanediisocyanate, 2, 4-trimethylhexanediisocyanate, butene diisocyanate, 1, 3-butadiene-1, 4-diisocyanate, 2, 4-trimethyl 1, 6-hexanediisocyanate, bis (isocyanatoethyl) carbonate, bis (isocyanatoethyl) ether and lysine methyl diisocyanate, with hexamethylene diisocyanate being most preferred.
The cycloaliphatic isocyanate preferably comprises one or more of the following: isophorone diisocyanate (IPDI), isomeric bis (4, 4' -isocyanatocyclohexyl) methane or mixtures of any of its isomeric contents, 1, 4-cyclohexylene diisocyanate, 1, 3-bis (isocyanatomethyl) benzene (XDI), 1, 3-and/or 1, 4-bis (2-isocyanatoprop-2-yl) -benzene (TMXDI), norbornane diisocyanate (NBDI), hydrogenated xylylene diisocyanate (H 6 XDI), 1, 4-cyclohexyl diisocyanate (H) 6 PPDI), 1, 5-Pentanediisocyanate (PDI), and dicyclohexylmethane diisocyanate.
Most preferred are uretdiones, allophanates, isocyanurates or mixtures thereof based on hexamethylene diisocyanate polymerization.
The isocyanate functionality of the polyisocyanate of the B component is preferably greater than 2 and less than 3, most preferably 2.5.
The polyisocyanates of the component B have a viscosity of most preferably from 100 mPas to 560 mPas, a viscosity test according to DIN EN ISO 3219/A.3, a test temperature of 23℃and a shear rate of 10s -1 The rotor selects MV-DIN.
The solids content of the polyisocyanates of the B component is preferably 100% by weight, relative to the total weight of the B component.
The isocyanate group content of the polyisocyanate of the B component is preferably 18% to 22% by weight relative to the total weight of the polyisocyanate.
Use of the same
Substrate material
The substrate may be artificial stone, wood, artificial wood, marble, terrazzo, ceramic, linoleum, metal, mineral material, plastic, rubber, concrete, composite board, paper, leather, or glass.
The substrate may be pretreated, preferably by sanding or coating.
Coating method
The application may be by methods well known to those skilled in the art, such as knife coating, dip coating, brush coating, roller coating, spray coating or curtain coating.
Coated product
The coated product is preferably a floor.
The thickness of the coating is preferably 1mm to 3mm.
The coating may be single-layered or multi-layered.
Examples
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. To the extent that the definitions of terms in this specification are inconsistent with the ordinary understanding of those skilled in the art to which this invention pertains, the definitions described herein control.
Unless otherwise indicated, all numbers expressing quantities of ingredients, reaction conditions, and so forth used in the specification and claims are to be understood as being modified in all instances by the term "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth herein are approximations that may vary depending upon the desired properties to be obtained.
As used herein, "and/or" means one or all of the elements mentioned.
The use of "including" and "comprising" herein encompasses both the situation in which only the elements are mentioned and the situation in which other elements not mentioned are present in addition to the elements mentioned.
All percentages in the present invention are by weight unless otherwise indicated.
Analytical measurements according to the invention were carried out at 25.+ -. 2 ℃ and 60.+ -. 10% humidity, unless otherwise indicated.
The isocyanate group (NCO) content was determined by volume according to DIN-EN ISO 11909 and the data determined included the free and potentially free NCO content.
Isocyanate functionality was determined according to GPC.
The amine group content was determined according to AFAM 2011-06054.
The viscosity of the polyaspartic acid esters was determined in accordance with DIN 53019.
Viscosity test of polyisocyanates according to DIN EN ISO 3219/A.3, test temperature 23℃and shear rate 10s -1 The rotor selects MV-DIN.
Pot life of two-part coating composition: starting to measure the viscosity of the system until 10000 mPa.s-12000 mPa.s by using a Brookfield rotor viscometer (64 # rotor, rotating speed 20rpm, ambient temperature 23 ℃ and ambient humidity 50%) at 3 rd minute after mixing the component A and the component B, and stopping measuring and recording the time at the moment as the pot life; if the viscosity had not reached 10000 mPa.s for a duration of 50 minutes after mixing, the measurement was stopped and the pot life was 50 minutes. And the pot life is more than or equal to 10 minutes and is qualified.
The construction time is as follows: the component A and the component B are mixed to obtain a bi-component coating composition, a proper amount of the composition is poured on a stainless steel iron plate, a sawtooth scraper with the thickness of 2mm is used for trowelling the coating, a defoaming roller is used for defoaming the surface of the coating every 5 minutes, and if the rolling mark of the defoaming roller cannot be eliminated, stopping and recording the duration as the construction time of the coating composition. And the construction time is more than or equal to 10 minutes and is qualified.
Walking time: the A component and the B component are mixed to obtain a two-component coating composition, a proper amount of the coating composition is poured into a circular PE plastic film tool with the diameter of 7.5cm to form a coating film with the thickness of 2mm, the coating film is pressed with thumb and fingernails under the pressure of 3kg every 30 minutes to check, and if the coating film does not generate obvious collapse after being pressed or can recover by itself within 10 seconds, the coating film is stopped and the lasting time is recorded as the walkable time. The walking time is not more than 3 hours and is qualified.
Hardness: the test was performed according to JIS K6253 (Shore D). And the hardness is more than or equal to 70 and is qualified.
Raw materials and reagents
NH 1420: polyaspartic acid ester, 100% by weight solids, amine group functionality of 2.0, amine equivalent of 279, viscosity of 900-2000mPa.s (25 ℃) was purchased from Cortish Co., ltd.
NH 1220: the polyaspartic acid ester, 100% by weight solids, has an amine group functionality of 2.0, an amine equivalent of 234 and a viscosity of 100mPa.s or less (25 ℃ C.) and is available from Cortish Co., ltd.
NH 1520: polyaspartic acid ester, 100% by weight solids, an amine group functionality of 2.0, an amine equivalent of 290 and a viscosity of 800-2000mPa.s (25 ℃ C.) available from Cortisol, germany.
NH 2850: the polyaspartic acid ester, 100% by weight solids, has an amine group equivalent of 295 and a viscosity of 80mPa.s (25 ℃) and is available from Cortish Co., ltd.
N3400: 100% by weight of the aliphatic uretdione based on HDI, having an NCO content of 21.8% by weight, an HDI monomer content of less than 0.3% by weight, an isocyanate functionality of 2.5 and a viscosity of about 175 mPas (23 ℃) are available from Corp.
N31100: based on the aliphatic trimer of HDI and allophanate, 100% by weight solids, NCO content of 19.5% by weight, HDI monomer content of less than 0.1% by weight, isocyanate functionality of 2.5, viscosity of about 500 mPas (23 ℃ C.) are available from Kogyo Co.
N3600: based on the aliphatic trimer of HDI, 100% by weight solids, NCO equivalent 183, NCO content of 23.0% by weight, HDI monomer content of less than 0.25% by weight, isocyanate functionality of 3.2, viscosity of 1200 mPas (23 ℃ C.) are available from Kogyo Co. />N3900: based on the aliphatic trimer of HDI, 100 wt.% solids, NCO content of 23.5wt.%, HDI monomer content of less than 0.25wt.%, isocyanate functionality of 3.2, viscosity of about 730 mpa.s (23 ℃, commercially available from koku corporation).
DISPERBYK 111: copolymers containing acidic groups, wetting dispersants, are available from pick chemistry.
BYK1799: mixtures of foam breaking polysiloxanes and hydrophobic particles, defoamers, are available from pick chemistry.
BYK320: polyether modified polymethylalkylsiloxane solution, wetting leveling agent, commercially available from pick chemistry.
BaSO 4 : pigment filler, 6000 mesh, available from sa Ha Liben.
R706: titanium dioxide, pigment and filler, available from Cormu.
SYLOSIV A4: water scavenger, molecular sieve, available from glaes.
BDO: butanediol, hydroxyl content 37.8%, hydroxyl functionality 2, calculated molecular weight 90g/mol, is commercially available from national pharmaceutical agents.
VP LS 2249/1: the polyester polyol, 100% by weight solids, has a hydroxyl content of 15.5% by weight, a hydroxyl functionality of 3 and a calculated molecular weight of 329g/mol, available from Cortish Co., ltd.
850: the polyester polyol, 100% by weight solids, has a hydroxyl content of 8.5% by weight, a hydroxyl functionality of 2 and a calculated molecular weight of 400g/mol, available from Cortish Co., ltd.
1380BT: the polyether polyol, 100% by weight solids, has a hydroxyl content of 11.7% by weight, a hydroxyl functionality of 3 and a calculated molecular weight of 436g/mol, available from Cortish Co., ltd.
C1100: polycaprolactone-modified straight chainAn aliphatic polycarbonate polyol having a hydroxyl content of 3.3 wt% and a hydroxyl functionality of 2 and a calculated molecular weight of 1030g/mol was obtained from Kogyo Co., ltd.
3170: polyether polyols based on polypropylene oxide and polyethylene oxide, having a hydroxyl content of 3.0% by weight, a hydroxyl functionality of 6 and a calculated molecular weight of 3400g/mol, are commercially available from Cortish Co.
PEG200: polyethylene glycol, 17% by weight hydroxyl content, hydroxyl functionality of 2, calculated molecular weight of 200g/mol, is commercially available from national pharmaceutical agents.
PEG400: polyethylene glycol, having a hydroxyl content of 8.5% by weight, a hydroxyl functionality of 2 and a calculated molecular weight of 400g/mol, is commercially available from national pharmaceutical agents.
PEG600: polyethylene glycol, having a hydroxyl content of 5.66% by weight, a hydroxyl functionality of 2 and a calculated molecular weight of 600g/mol, is commercially available from national pharmaceutical agents.
The molecular weight of the polymer polyol is calculated as follows: molecular weight=56.1×1000×f/(hydroxyl number of polymer polyol+acid number of polymer polyol), where 56.1 is molecular weight of KOH and f is functionality of polymer polyol, toVP LS2249/1 is exemplified by hydroxyl value=33 =33 +.>Hydroxyl content of VP LS2249/1 100=33×15.5% 100=511.5, acid number 0, ++>VP LS2249/1 molecular weight calculated = 56.1 x 1000 x 3/(511.5+0) =329 g/mol.
Process for preparing coating composition
Preparing a component A: according to the amounts shown in Table 1, polyaspartic acid ester was added and stirred at a speed of 1000 to 2000 rpm, then polymer polyol and surface auxiliary agent were added and stirring was continued at a speed of 1000 to 2000 rpm for 5 to 10 minutes, and pigment filler and water scavenger were added and stirring was continued at a speed of 1500 to 2500 rpm for 15 to 30 minutes to obtain the A component.
And (3) preparing a component B: the use of the individual polyisocyanates as component B requires no additional formulation by using the supplied form. When the polyisocyanates are compounded and used, the polyisocyanates are put into the mixture in sequence and stirred for 5 to 10 minutes at the speed of 500 to 1000 revolutions per minute to obtain the component B.
The two-component coating compositions of examples and comparative examples were prepared by mixing the B-component and the A-component in the NCO/NH ratio shown in Table 1 and stirring at 2000 rpm for 2 minutes.
Examples 1 to 7 and comparative examples 1 to 14
Table 1 shows the components of the two-component coating compositions of examples 1-7 and comparative examples 1-14 and the results of the performance tests of the compositions.
As can be seen from examples 1-7, the two-part coating compositions of the present invention have a long pot life, short walkable time and high hardness.
The polymer polyols contained in the two-component coating compositions of comparative examples 1 to 6 had a molecular weight of less than 250g/mol or greater than 420g/mol, and the coating compositions did not satisfy the balance between pot life, pot life and pot life.
Comparative example 1 and comparative examples 7-8, the coating composition has a long walkable time or a short work time when the polymer polyol content in the two-part coating composition is 0.135 wt% and 0.405 wt%.
Comparative examples 4-6 and comparative examples 9-11, when the polyisocyanate viscosity of the B component of the two-component coating composition is less than 80 mPas or greater than 580 mPas, the pot life of the coating composition is short and the pot life is short.
Comparative example 7 and comparative examples 12-14, when the polyaspartic acid ester in the a-component of the two-component coating composition of comparative example does not have the structure of formula I, the short pot life of the composition results in no construction or long walkable times and poor hardness.
It will be evident to those skilled in the art that the invention is not limited to the precise details set forth, and that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description; and therefore any changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (17)
1. A two-part coating composition comprising an a-part and a B-part, the a-part comprising:
a) A polyaspartic acid ester having a viscosity of 900 mPas to 2000 mPas, the viscosity test being in accordance with DIN53019;
b) A polymer polyol having a molecular weight of 250g/mol to 420 g/mol;
c) An auxiliary agent;
the polyaspartic acid ester has a structure of formula I:
wherein R is 1 And R is 2 Each independently selected from methyl, ethyl or butyl;
the amount of the polymer polyol is 0.15 wt% to 0.35 wt%, the sum of the weight of the polyaspartic acid ester and the polymer polyol is 40 wt% to 97 wt%, the amounts being relative to the total weight of the a-component;
the component B comprises a polyisocyanate which is an uretdione, allophanate, isocyanurate or a mixture thereof polymerized on the basis of aliphatic and/or cycloaliphatic diisocyanates, the polyisocyanate having a viscosity of 80mPa.s to 580 mPa.s, the viscosity test being in accordance with DIN EN ISO 3219/A.3, the test temperature being 23℃and the shear rate being 10s -1 The rotor selects MV-DIN; the composition has a molar ratio of isocyanate groups to amine groups of 0.2 to 5.
2. The composition of claim 1, wherein R 1 And R is 2 Each independently is ethyl.
3. The composition of claim 1 or 2, wherein the polyaspartic acid ester has at least one of the following characteristics:
amine number from 150mg KOH/g to 250mg KOH/g, amine number test according to 2011-0605401-05D;
the amine group equivalent is 200-300.
4. The composition of claim 1, wherein the polymer polyol has a molecular weight of 320g/mol to 420g/mol.
5. The composition of claim 1, wherein the polymer polyol has a hydroxyl functionality of not less than 2.
6. The composition of claim 1, wherein the polymer polyol is present in an amount of 0.2 wt% to 0.3 wt% relative to the total weight of the a component.
7. The composition of claim 1, wherein the adjuvant comprises a surface adjuvant, an optional pigment filler, and an optional water scavenger.
8. The composition of claim 7, wherein the surface aid is one or more of the following: wetting dispersant, defoamer and wetting leveling agent.
9. The composition of claim 7 wherein the surface aid is present in an amount of 0.1 wt% to 3 wt% relative to the total weight of the a component.
10. The composition of claim 1 wherein the polyisocyanate of the B component is a uretdione, allophanate, isocyanurate, or mixture thereof polymerized based on hexamethylene diisocyanate.
11. The composition of claim 1 wherein the polyisocyanate of the B component has an isocyanate functionality of greater than 2 and less than 3, most preferably 2.5.
12. The composition of claim 1, wherein the polyisocyanate of the B component has a viscosity of from 100 mPas to 560 mPas and a viscosity test according to DIN EN ISO 3219/A.3 at a test temperature of 23℃and a shear rate of 10s -1 The rotor selects MV-DIN.
13. The composition of claim 1, wherein the composition has a molar ratio of isocyanate groups to amine groups of from 1 to 1.5.
14. Use of a coating composition according to any of claims 1-13 for protecting a substrate surface or a substrate surface coating.
15. A coating method comprising the steps of: a coating composition according to any one of claims 1 to 13 applied to a substrate surface, followed by curing and drying.
16. A coated product comprising a substrate and a cured, dried coating layer formed by applying the coating composition according to any one of claims 1-13 to said substrate.
17. The coated product of claim 16, wherein the coated product is a floor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210643113.8A CN117229700A (en) | 2022-06-08 | 2022-06-08 | Two-component coating composition |
| PCT/EP2023/063920 WO2023237339A1 (en) | 2022-06-08 | 2023-05-24 | Two-component coating composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210643113.8A CN117229700A (en) | 2022-06-08 | 2022-06-08 | Two-component coating composition |
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| CN202210643113.8A Pending CN117229700A (en) | 2022-06-08 | 2022-06-08 | Two-component coating composition |
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