CN115449287A - Viscosity adjusting composition suitable for waterborne bi-component polyurethane system, and preparation method and application thereof - Google Patents
Viscosity adjusting composition suitable for waterborne bi-component polyurethane system, and preparation method and application thereof Download PDFInfo
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- CN115449287A CN115449287A CN202211036697.9A CN202211036697A CN115449287A CN 115449287 A CN115449287 A CN 115449287A CN 202211036697 A CN202211036697 A CN 202211036697A CN 115449287 A CN115449287 A CN 115449287A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
- C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
- C08G18/6666—Compounds of group C08G18/48 or C08G18/52
- C08G18/667—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
- C08G18/6681—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
- C08G18/6688—Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
Abstract
The invention discloses a viscosity adjusting composition suitable for a water-based two-component polyurethane system and a preparation method thereof. The viscosity regulating composition enables resin molecular chains to have more physical hydrophobic association points and chemical association points through the functional chain extender and a small amount of cross-linking agent, shows high thickening efficiency and excellent activation period in a water-based two-component polyurethane system with medium and high film-forming auxiliaries, and has better workability.
Description
The technical field is as follows:
the invention relates to an associative polyurethane rheological additive, which shows an excellent activation period in a water-based two-component polyurethane system. The invention also relates to a preparation method and application of the viscosity regulating composition.
Background art:
along with the stricter requirements of environmental laws and regulations, the oil-to-water conversion in the coating field is faster and wider. The water-based paint takes water as a dispersion medium, and has the advantages of environmental protection, safety, convenient construction, resource saving and the like.
The construction process of the water-based paint is complex, and comprises spraying, roller coating, dip coating, brush coating and the like, and different construction processes have large requirements on the rheological property of the paint. In order to make the rheological property of the water-based paint meet the requirements of construction process, a rheological additive is usually added into the water-based paint to adjust the rheological property of the system. The commonly used rheological additives in the water-based paint comprise bentonite, fumed silica, cellulose ethers, polyacrylic acid (ester) and associative polyurethane, wherein the associative polyurethane thickener is widely applied to the fields of textile printing, industrial paint and wood paint due to high thickening efficiency, good leveling property and storage stability and excellent chemical reagent resistance of a paint film.
CN110965362A uses hyperbranched polyester Boltorn H20 to prepare a branched-chain polyurethane thickener with multi-point association, the thickening efficiency of the branched-chain polyurethane thickener is far higher than that of a linear-chain polyurethane thickener, but the polymerization controllability is poor, and the easy hydrolysis of an ester bond influences the thickening stability.
CN112961320B uses HDI trimer to prepare a polyethylene glycol bridged star-linked structure polyurethane thickener, which has high thickening efficiency, but the polymerization process is relatively complex, and the thickening response speed is relatively slow.
CN112898529B uses a star chain extender of bis (2-hydroxyethyl) imino- (trihydroxymethyl) methane to prepare an asymmetric star polyurethane thickener with a cationic core, which has certain reverse electrolyte property and thickening efficiency higher than that of a common linear thickener, but still not high enough.
CN102101909 prepares a water-soluble associative polyurethane thickener through solution polymerization, and uses polyhydroxy compound to extend chain, the thickening efficiency is high, but needs to use a low boiling point solvent, and the process risk is high.
The associative polyurethane thickener products described in the above patents can be applied to water-based paint, but in a water-based two-component polyurethane system with medium and high cosolvent contents, the problems of low thickening efficiency and deviation of activation period exist. This patent is through function chain extender introduce certain quantity's long chain alkyl in the molecular chain, make physical association point number increase, thickening efficiency promotes, introduce proper amount chemical crosslinking point through a small amount of cross-linking agent simultaneously, promote solvent tolerance, the problem that the solvent destroys physical association point and leads to thickening efficiency to descend has been solved, the two combined action makes this viscosity adjust the composition possess high thickening efficiency and solvent tolerance, it is high to demonstrate thickening efficiency in aqueous two ingredient polyurethane systems such as industrial paint and wooden furniture lacquer, the activation period is excellent, the good characteristics of constructability.
The invention content is as follows:
the invention aims to provide a viscosity regulating composition suitable for an aqueous two-component polyurethane system, wherein a resin molecular chain has more physical and hydrophobic association points and chemical association points through a functional chain extender and a small amount of cross-linking agent, and the viscosity regulating composition shows high thickening efficiency and excellent activation period in the aqueous two-component polyurethane system with medium and high film-forming auxiliaries.
It is another object of the present invention to provide a method for preparing the viscosity-regulating composition;
it is a further object of the present invention to provide the use of said viscosity modulating composition;
in order to achieve the above purpose, the invention is realized by the following technical scheme:
first, the present invention provides a viscosity-regulating composition suitable for aqueous two-component polyurethane systems, the viscosity-regulating composition being prepared by reacting raw materials comprising:
s1: one or more polyisocyanates;
s2: one or more hydrophilic macromolecular polyether polyols, wherein the weight fraction of the ethylene oxide chain segment in the structure is more than 80 percent;
s3: one or more functional chain extenders having the following structural formula:
wherein R is an alkyl group of 8 to 24 carbon atoms, preferably an alkyl group of 12 to 18 carbon atoms; x and y are any integer of 1-25;
s4: one or more crosslinking agents containing 3 to 4 reactive hydroxyl groups;
s5: one or more blocking agents having a hydrophobic structure with a reactive group on the structure that is reactive with isocyanate groups;
s6: one or more water-soluble viscosity-reducing substances;
s7: water;
s8: a catalyst capable of catalyzing the reaction of isocyanate groups with hydroxyl groups;
as a preferable aspect, in the present invention, in the above viscosity adjusting composition, based on the total mass of the components S1 to S7:
the amount of the component S1 is 1.0-4.0%, preferably 1.20-2.70%;
the amount of the component S2 is 10-40%, preferably 12-30%;
the amount of the component S3 is 0.01 to 0.5 percent, preferably 0.02 to 0.31 percent;
the amount of the component S4 is 0.01 to 0.2 percent, preferably 0.02 to 0.12 percent;
the amount of the component S5 is 0.2 to 3.0 percent, preferably 0.5 to 1.5 percent;
the amount of the component S6 is 10-50%, preferably 14-30%;
the amount of the component S7 is 25 to 78 percent, preferably 38 to 70 percent;
the amount of the component S8 is 0-2000ppm, preferably 100-400ppm;
in the component S1 of the present invention, the polyisocyanate includes, but is not limited to, one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, preferably one or more of isophorone diisocyanate and dicyclohexylmethane diisocyanate; and/or
In the component S2 of the present invention, the macromolecular polyether polyol includes, but is not limited to, polyoxyethylene glycol, polyoxyethylene-oxypropylene glycol, and polyoxyethylene triol, preferably polyoxyethylene glycol, wherein the molecular weight of the polyoxyethylene glycol is more preferably 1000-20000 daltons, and further preferably 4000-8000 daltons; and/or
In the component S3, the functional chain extender is ethoxylated fatty amine, the molecular weight is 100-10000 daltons, and the preferred molecular weight is 300-1000 daltons; and/or
In the component S4 of the present invention, the crosslinking agent includes, but is not limited to, one or more of glycerol, trimethylolpropane, triethanolamine and their ethoxylated or propoxylated products, preferably glycerol and/or trimethylolpropane; and/or
In the component S5 of the present invention, the end capping agent having a hydrophobic structure includes, but is not limited to, one or more of n-decanol, n-dodecanol, n-tetradecanol, n-hexadecanol, n-octadecanol, n-eicosanol, n-docosanol, n-tetracosanol, isomeric dodecanol, isomeric tridecanol, isomeric hexadecanol, isomeric eicosanol, isomeric tetracosanol, dodecylamine, tetradecylamine, hexadecylamine, and octadecylamine, preferably isomeric dodecanol and isomeric hexadecanol; and/or
In the component S6, the viscosity reducing substance comprises one or more of propylene glycol methyl ether, dipropylene glycol methyl ether, ethylene glycol butyl ether, diethylene glycol butyl ether, tripropylene glycol methyl ether, tripropylene glycol butyl ether and triethylene glycol butyl ether, preferably diethylene glycol butyl ether; and/or
In the component S8 of the present invention, the catalyst includes but is not limited to organic bismuth or organic tin catalysts, preferably Bi @8108 or butyl tin laurate of US leading company, more preferably Bi @8108 of US leading company.
In the present invention, the above-mentioned viscosity-regulating composition suitable for aqueous two-component polyurethane systems preferably has a solids content of from 10 to 55% by weight, more preferably from 15 to 35% by weight.
In another aspect of the present invention, there is also provided a method for preparing the viscosity-adjusting composition for an aqueous two-component polyurethane system, comprising the steps of:
(1) Mixing the components S1, S2 and S8, and reacting at 60-95 ℃ until NCO reaches a theoretical value to generate a diisocyanate-terminated prepolymer;
(2) Adding the components S5, S3 and S4 into the prepolymer in the step (1) for mixing, and reacting at 60-95 ℃ until the NCO percent is less than 0.05 percent; then, uniformly dispersing the resin into the mixed solvent of S6 and S7 to obtain the viscosity regulating composition suitable for the aqueous two-component polyurethane system;
in the step (1), the water content of the polyether polyol is lower than 500ppm, and in some specific embodiments of the invention, the polyether polyol comprises dehydration treatment before reaction, the method is vacuum dehydration, and the dehydration temperature can be selected from 90-120 ℃, preferably 100-110 ℃; the dewatering time can be selected from 0.5 to 2 hours, preferably from 1 to 1.5 hours.
Finally, the invention provides for the use of the viscosity-regulating composition as a rheology aid in component A of an aqueous two-component polyurethane system.
The beneficial effects of the invention are mainly embodied in the following aspects:
the functional chain extender is used for introducing a certain amount of long-chain alkyl into a molecular chain, so that the number of physical association points is increased, the thickening efficiency is improved, meanwhile, a proper amount of chemical cross-linking points are introduced through a small amount of cross-linking agents, the solvent tolerance is improved, the problem that the thickening efficiency is reduced due to the fact that the physical association points are destroyed by a solvent is solved, the viscosity adjusting composition has high thickening efficiency and high solvent tolerance under the combined action of the two, the thickening efficiency and the activation period are high in the aqueous two-component polyurethane system of the medium and high film-forming auxiliary agents, and the construction performance is better.
Detailed Description
The following examples are further illustrative of the present invention and are not intended to limit the scope of the present invention. It will be understood by those skilled in the art that various modifications and equivalents may be made thereto without departing from the spirit and scope of the present invention, and all such modifications and equivalents are intended to be included within the scope of the appended claims. Within the scope of the present invention, the above-described technical features of the present invention and the technical features described in detail below (e.g., the examples) may be combined with each other to constitute a new or preferred technical solution.
Examples main raw material sources:
4, 4-dicyclohexylmethane diisocyanate (HMDI): industrial grade, wanhua chemical group, inc;
isophorone diisocyanate: industrial grade, wanhua chemical group, inc;
catalyst: bi @8108, industrial grade, leading USA Inc.;
polyethylene glycol-8000: industrial grade, wanhua chemical group, inc;
polyethylene glycol-6000: technical grade, CLARIANT;
polyethylene glycol-4000: technical grade, CLARIANT;
isomeric dodecanol: industrial grade, saso chemical ltd;
isomeric hexadecanol: industrial grade, saso chemical ltd;
n-dodecanol, analytically pure, pharmaceutical chemicals ltd;
n-hexadecanol, analytically pure, national chemical reagents ltd;
n-octadecanol, analytically pure, national chemical reagents ltd;
2 EO-ethoxylated fatty amine (Genamin O020), technical grade, CLARIANT;
8 EO-ethoxylated fatty amine (Genamin O080), technical grade, CLARIANT;
10 EO-ethoxylated fatty amine (Genamin T100), technical grade, CLARIANT;
glycerol, analytical pure, pharmaceutical chemicals limited;
trimethylolpropane, industrial grade, wanhua chemical group, inc;
diethylene glycol butyl ether, technical grade, DOW;
the analytical instrument and the test method are as follows:
the solid content testing method comprises the following steps: weighing a proper amount of the dispersion in a container made of tin foil paper, weighing the weight change at 150 ℃ for 20min, and calculating the solid content of the dispersion;
an activation period: taking the prepared two-component paint, adjusting the viscosity to about 30s by using a paint No. four cup, putting the paint into a constant-temperature oven with the preset temperature of 35 ℃, taking out the viscosity of the test paint every 1 hour, recording the viscosity, and observing the viscosity change.
Ku viscosity: refer to the national standard GB/T9269-2009 Stomer viscosity determination method for paint viscosity;
example 1
(1) 150g of dehydrated PEG-6000, 13.12g4,4' -dicyclohexylmethane diisocyanate HMDI and 0.27g of Bi @8108 are added into a 1L four-neck flask and stirred uniformly, the temperature is heated to 75 ℃, and NCO is sampled and monitored in the experimental process until the NCO reaches a theoretical value of 1.29 percent to generate a diisocyanate-terminated prepolymer;
(2) After the reaction in the step (1) is finished, adding 1.21g of isomeric dodecanol, 6.10g of isomeric hexadecanol, 0.15g of Genamin O020 and 0.54g of glycerol into a flask, and continuing to perform heat preservation reaction until the NCO% is less than 0.05%; then, 171.11g of diethylene glycol butyl ether and 342.23g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition VAM1 suitable for the water-based two-component polyurethane system is prepared.
Example 2
(1) 150g of dehydrated PEG-6000, 11.48g of isophorone diisocyanate (IPDI) and 0.27g of Bi @8108 are added into a 1L four-neck flask and are uniformly stirred, the temperature is increased to 80 ℃, and a sample is taken to monitor NCO in the experimental process until the NCO reaches a theoretical value of 1.39 percent to generate a diisocyanate-terminated prepolymer;
(2) After the reaction in the step (1) is finished, adding 0.96g of n-dodecanol, 6.06g of n-hexadecanol, 1.62g of Genamin O080 and 0.75g of trimethylolpropane into a flask, and continuing to perform heat preservation reaction until the NCO percent is less than 0.05 percent; then, 170.88g of diethylene glycol butyl ether and 341.76g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition VAM2 suitable for the aqueous two-component polyurethane system is prepared.
Example 3
(1) Adding 85.7g of dehydrated PEG-6000, 64.3g of dehydrated PEG-4000, 14.29g of 4,4' -dicyclohexylmethane diisocyanate HMDI and 0.28g of Bi @8108 into a 1L four-neck flask, uniformly stirring, heating to 85 ℃, sampling and monitoring NCO in the experimental process until the NCO reaches a theoretical value of 1.41 percent, and generating a diisocyanate-terminated prepolymer;
(2) After the reaction in the step (1) is finished, adding 1.54g of isomeric dodecanol, 5.57g of isomeric hexadecanol, 0.47g of Genamin O020 and 0.66g of glycerol into a flask, and continuing to perform heat preservation reaction until the NCO% is less than 0.05%; then, 172.53g of diethylene glycol monobutyl ether and 345.05g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition VAM3 suitable for the aqueous two-component polyurethane system is prepared.
Example 4
(1) 150g of dehydrated PEG-6000, 13.55g of 4,4' -dicyclohexylmethane diisocyanate (HMDI) and 0.22g of Bi @8108 are added into a 1L four-neck flask and stirred uniformly, the mixture is heated to 90 ℃, and NCO is sampled and monitored in the experimental process until the NCO reaches a theoretical value of 1.37 percent to form a diisocyanate-terminated prepolymer;
(2) After the reaction in the step (1) is finished, adding 1.24g of isomeric dodecanol, 5.05g of isomeric hexadecanol, 3.21g of Genamin O020 and 0.23g of glycerol into a flask, and continuing to perform heat preservation reaction until the NCO% is less than 0.05%; then, 151.63g of diethylene glycol monobutyl ether and 758.16g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition VAM4 suitable for the aqueous two-component polyurethane system is prepared.
Example 5
(1) 150g of dehydrated PEG-6000, 13.12g4,4' -dicyclohexylmethane diisocyanate HMDI and 0.21g of Bi @8108 are added into a 1L four-neck flask and uniformly stirred, heated to 85 ℃, and a sample is taken in the experimental process to monitor NCO until NCO reaches a theoretical value of 1.29%, so that a diisocyanate-terminated prepolymer is generated;
(2) After the reaction in the step (1) is finished, adding 1.21g of isomeric dodecanol, 5.90g of isomeric hexadecanol, 0.30g of Genamin T100 and 0.54g of glycerol into a flask, and continuing to perform heat preservation reaction until the NCO percent is less than 0.05 percent; then, 145.34g of diethylene glycol monobutyl ether and 202.43g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition VAM5 suitable for the aqueous two-component polyurethane system is prepared.
Comparative example 1
(1) 150g of dehydrated PEG-6000, 8.75g of 4,4' -dicyclohexylmethane diisocyanate HMDI and 0.16g of Bi @8108 are added into a 1L four-neck flask and stirred uniformly, heated to 85 ℃, and NCO is sampled and monitored in the experimental process until the NCO reaches the theoretical value of 0.44 percent, so that diisocyanate-terminated prepolymer is generated;
(2) After the reaction in the step (1) is finished, adding 0.55g of isomeric dodecanol, 2.85g of isomeric hexadecanol and 0.09g of trimethylolpropane into a flask, and continuing to perform heat preservation reaction until the NCO percent is less than 0.05 percent; then, 162.23g of diethylene glycol butyl ether and 324.45g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition C1 suitable for the aqueous two-component polyurethane system is prepared.
Comparative example 2
(1) Adding 45g of dehydrated PPG-6000, 105g of dehydrated PEG6000, 8.75g of 4,4' -dicyclohexylmethane diisocyanate HMDI and 0.16g of Bi @8108 into a 1L four-neck flask, uniformly stirring, heating to 85 ℃, sampling and monitoring NCO in the experimental process until the NCO reaches a theoretical value of 0.44%, and generating a diisocyanate-terminated prepolymer;
(2) After the reaction in the step (1) is finished, adding 0.27g of hexanol, 2.59g of isomeric hexadecanol and 1.18g of GenaminT 100 into a flask, and continuing to perform heat preservation reaction until the NCO% is less than 0.05%; then, 163.5g of diethylene glycol monobutyl ether and 327.00g of deionized water are used for uniformly dispersing the high-viscosity resin, and the viscosity adjusting composition C2 suitable for the aqueous two-component polyurethane system is prepared.
Comparative example 3
The same type of product available on the market, vesmody U905;
the formulations used for the thickening efficiency test are shown in table 1:
weighing the emulsion according to the table 1, sequentially adding Tego245, tego270, DPM, DPnB, water and a thickening agent under the stirring of 1200rpm, continuously stirring for 30min, and then standing for 2h at 25 +/-0.5 ℃ for testing;
TABLE 1
Note: the addition amount of the thickening agent is adjusted to the same effective addition amount according to the actual solid content of the embodiment and the comparative example;
the thickening efficiency of the examples and comparative examples in the application formulations is shown in table 2:
TABLE 2
Note: eta 6rpm 、η 60rpm Viscosities of 25 + -0.5 deg.C measured with a Brookfield viscometer at 6rpm and 60rpm, respectively; TI value of η 6rpm /η 60rpm And characterizing the thixotropy of the system.
The formulations used for the pot life tests are shown in table 3:
TABLE 3
Note: the amount of thickener added during the pot life test was determined to be exactly 30s for cup four after mixing of the a and B components.
The results of the pot life test are shown in table 4:
TABLE 4
As can be seen from the results of tables 2 and 4, the viscosity-adjusting compositions prepared in examples 1 to 5 have better thickening efficiency and more excellent pot life in the aqueous two-component polyurethane system, as compared to comparative examples 1 to 3.
Claims (10)
1. A viscosity modifying composition suitable for use in an aqueous two-component polyurethane system, the viscosity modifying composition being prepared from the reaction of raw materials comprising:
s1: one or more polyisocyanates;
s2: one or more hydrophilic macromolecular polyether polyols, wherein the weight fraction of the ethylene oxide chain segment in the structure is more than 80 percent;
s3: one or more functional chain extenders having the following structural formula:
wherein R is an alkyl group of 8 to 24 carbon atoms, preferably an alkyl group of 12 to 18 carbon atoms; x and y are any integer of 1-25;
s4: one or more crosslinking agents containing 3 to 4 reactive hydroxyl groups;
s5: one or more blocking agents having a hydrophobic structure with a reactive group on the structure that is reactive with isocyanate groups;
s6: one or more water-soluble viscosity-reducing substances;
s7: water;
s8: a catalyst capable of catalyzing the reaction of isocyanate groups with hydroxyl groups.
2. Viscosity-regulating composition suitable for aqueous two-component polyurethane systems according to claim 1, characterized in that, based on the total mass of components S1 to S7:
the amount of the component S1 is 1.0-4.0%, preferably 1.20-2.70%;
the amount of the component S2 is 10-40%, preferably 12-30%;
the amount of the component S3 is 0.01 to 0.5 percent, preferably 0.02 to 0.31 percent;
the amount of the component S4 is 0.01 to 0.2 percent, preferably 0.02 to 0.12 percent;
the amount of the component S5 is 0.2 to 3.0 percent, preferably 0.5 to 1.5 percent;
the amount of the component S6 is 10-50%, preferably 14-30%;
the amount of the component S7 is 25 to 78 percent, preferably 38 to 70 percent;
the amount of the component S8 is 0 to 2000ppm, preferably 100 to 400ppm.
3. The viscosity-regulating composition according to claim 1 or 2, suitable for use in aqueous two-component polyurethane systems, wherein in component S1, the polyisocyanate comprises, but is not limited to, one or more of toluene diisocyanate, diphenylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and dicyclohexylmethane diisocyanate, preferably one or more of isophorone diisocyanate and dicyclohexylmethane diisocyanate.
4. Viscosity modifying composition suitable for aqueous two-component polyurethane systems according to any of claims 1-3, wherein in said component S2, said macromolecular polyether polyol comprises, but is not limited to, polyoxyethylene glycol, polyoxyethylene-oxypropylene glycol, polyoxyethylene triol, preferably polyoxyethylene diol, wherein more preferably polyoxyethylene diol has a molecular weight of 1000-20000 daltons, and even more preferably 4000-8000 daltons.
5. Viscosity modifying composition suitable for use in aqueous two-component polyurethane systems according to any of claims 1 to 4, characterized in that in component S3, the functional chain extender is an ethoxylated fatty amine with a molecular weight of 100 to 10000 Dalton, preferably 300 to 1000 Dalton; and/or, in the component S4, the cross-linking agent includes one or more of glycerol, trimethylolpropane, triethanolamine and their ethoxylation or propoxylation products, preferably glycerol and/or trimethylolpropane.
6. The viscosity-adjusting composition for aqueous two-component polyurethane systems according to any of claims 1 to 5, wherein the end-capping agent having a hydrophobic structure in component S5 comprises one or more of, but not limited to, n-decanol, n-dodecanol, n-tetradecanol, n-hexadecanol, n-octadecanol, n-eicosanol, n-docosanol, n-tetracosanol, isomeric dodecanol, isomeric tridecanol, isomeric hexadecanol, isomeric eicosanol, isomeric tetracosanol, dodecylamine, tetradecylamine, hexadecylamine, octadecylamine, preferably isomeric dodecanol and isomeric hexadecanol; and/or in the component S6, the viscosity reducing substance comprises one or more of but not limited to propylene glycol methyl ether, dipropylene glycol methyl ether, ethylene glycol butyl ether, diethylene glycol butyl ether, tripropylene glycol methyl ether, tripropylene glycol butyl ether and triethylene glycol butyl ether, and preferably diethylene glycol butyl ether.
7. Viscosity modifying composition according to any of claims 1 to 6, wherein the catalyst in component S8 comprises but is not limited to organo-bismuth or organo-tin catalysts, preferably Bi @8108 from the leading American company or butyl tin laurate, more preferably Bi @8108 from the leading American company.
8. Process for the preparation of a viscosity-regulating composition suitable for aqueous two-component polyurethane systems according to any of claims 1 to 7, comprising the steps of:
(1) Mixing the components S1, S2 and S8, and reacting at 60-95 ℃ until NCO reaches a theoretical value to generate a diisocyanate-terminated prepolymer;
(2) Adding the components S5, S3 and S4 into the prepolymer in the step (1) for mixing, and reacting at 60-95 ℃ until the NCO% is less than 0.05%; then, the resin is uniformly dispersed into the mixed solvent of S6 and S7, and the viscosity adjusting composition suitable for the water-based two-component polyurethane system is prepared.
9. The method of claim 8, wherein in step (1), the polyether polyol has a water content of less than 500ppm.
10. Use of a viscosity-regulating composition for aqueous two-component polyurethane systems according to any of claims 1 to 7 or a viscosity-regulating composition for aqueous two-component polyurethane systems prepared according to the preparation process according to any of claims 8 to 9 as a rheology aid in aqueous two-component polyurethane systems.
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211036697.9A Pending CN115449287A (en) | 2022-08-29 | 2022-08-29 | Viscosity adjusting composition suitable for waterborne bi-component polyurethane system, and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116410433A (en) * | 2022-12-30 | 2023-07-11 | 广州海豚新材料有限公司 | Silicon-containing polyurethane resin, preparation method thereof and synthetic leather bass |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499233A (en) * | 1983-05-03 | 1985-02-12 | Nl Industries, Inc. | Water dispersible, modified polyurethane and a thickened aqueous composition containing it |
| US5023309A (en) * | 1987-09-18 | 1991-06-11 | Rheox, Inc. | Water dispersible, modified polyurethane thickener with improved high shear viscosity in aqueous systems |
| US6020407A (en) * | 1995-11-07 | 2000-02-01 | Rheox, Inc. | Super dispersable thickening composition for aqueous systems and a method of thickening said aqueous systems |
| EP0978522A1 (en) * | 1998-08-06 | 2000-02-09 | National Starch and Chemical Investment Holding Corporation | Associative thickeners for aqueous systems |
-
2022
- 2022-08-29 CN CN202211036697.9A patent/CN115449287A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4499233A (en) * | 1983-05-03 | 1985-02-12 | Nl Industries, Inc. | Water dispersible, modified polyurethane and a thickened aqueous composition containing it |
| US5023309A (en) * | 1987-09-18 | 1991-06-11 | Rheox, Inc. | Water dispersible, modified polyurethane thickener with improved high shear viscosity in aqueous systems |
| US6020407A (en) * | 1995-11-07 | 2000-02-01 | Rheox, Inc. | Super dispersable thickening composition for aqueous systems and a method of thickening said aqueous systems |
| EP0978522A1 (en) * | 1998-08-06 | 2000-02-09 | National Starch and Chemical Investment Holding Corporation | Associative thickeners for aqueous systems |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116410433A (en) * | 2022-12-30 | 2023-07-11 | 广州海豚新材料有限公司 | Silicon-containing polyurethane resin, preparation method thereof and synthetic leather bass |
| CN116410433B (en) * | 2022-12-30 | 2023-10-24 | 广州海豚新材料有限公司 | Silicon-containing polyurethane resin, preparation method thereof and synthetic leather bass |
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