CN114085605A - High-storage-stability anti-settling type single-component polyurethane waterproof coating and preparation method thereof - Google Patents
High-storage-stability anti-settling type single-component polyurethane waterproof coating and preparation method thereof Download PDFInfo
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- CN114085605A CN114085605A CN202111570037.4A CN202111570037A CN114085605A CN 114085605 A CN114085605 A CN 114085605A CN 202111570037 A CN202111570037 A CN 202111570037A CN 114085605 A CN114085605 A CN 114085605A
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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
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/45—Anti-settling agents
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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Abstract
The invention belongs to the technical field of polyurethane waterproof coatings, and particularly relates to an anti-settling single-component polyurethane waterproof coating with high storage stability and a preparation method thereof. The single-component polyurethane waterproof coating comprises the following raw materials in percentage by weight: 25-35 parts of mixed polyether polyol, 4-7 parts of isocyanate, 40-50 parts of solid filler, 10-15 parts of plasticizer, 8-12 parts of solvent oil, 0.05-0.2 part of pigment, 0.2-0.5 part of dispersing agent, 0.2-0.5 part of defoaming agent, 0.05-0.2 part of catalyst, 0.2-0.8 part of water absorbent, 0.05-0.2 part of anti-settling agent and 0.5-1.5 parts of latent curing agent. The single-component polyurethane waterproof coating has high storage stability and the property of preventing solid fillers from settling; the invention also provides a preparation method of the composition.
Description
Technical Field
The invention belongs to the technical field of polyurethane waterproof coatings, and particularly relates to an anti-settling single-component polyurethane waterproof coating with high storage stability and a preparation method thereof.
Background
The polyurethane waterproof coating is a common waterproof material and has wide application in the field of building waterproofing. The product has single and double components, wherein the single-component polyurethane waterproof paint gradually becomes the main stream product of the polyurethane paint due to the convenient construction, the main raw materials of the product comprise polyether, isocyanate, plasticizer, solid filler, catalyst, dispersant, defoamer, solvent oil, pigment, latent curing agent and the like, the solid filler is the cheapest in cost, and the common filler comprises heavy calcium carbonate, bentonite, talcum powder, kaolin and the like. In order to produce more economical single-component polyurethane coatings, most manufacturers increase the proportion of powder to 40-50%, even more than 50%. According to the requirements of GB/T19250-.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the anti-settling single-component polyurethane waterproof coating with high storage stability is provided, has high storage stability and has the property of preventing solid fillers from settling; the invention also provides a preparation method of the composition.
The high-storage-stability anti-settling single-component polyurethane waterproof coating comprises the following raw materials in percentage by weight:
the mixed polyether polyol is a mixture of 2-functionality polyether polyol and 3-functionality polyether polyol with molecular weight of 2000-5000-. Wherein the difunctional polyether mainly provides linear chain extension of polyurethane molecular chains, and the trifunctional polyether mainly provides crosslinking among the polyurethane molecular chains.
Preferably, the mixed polyether polyol is a mixture of polyether polyol DL-2000 (east blue Star) and polyether polyol EP-330N (east blue Star) in a mixing mass ratio of 1.5-3: 1.
The isocyanate is toluene diisocyanate, the component and polyether are subjected to chemical reaction to generate polyurethane macromolecules blocked by-NCO groups, the polyurethane macromolecules can be further subjected to reaction with water in the air for crosslinking during coating construction to form reticular polyurethane macromolecule chains, and the rest raw materials are filled among the reticular macromolecule chains.
The solid filler, the pigment and the anti-settling agent are all used as polyurethane fillers, and the mechanical property of polyurethane can be improved and the production cost can be reduced by adding the solid filler.
Preferably, the solid filler is one or a mixture of heavy calcium carbonate and talcum powder.
Preferably, the pigment is carbon black.
Preferably, the anti-settling agent is organic bentonite; more preferably, the organic bentonite is one of 908 bentonite anti-settling agent, 818 bentonite anti-settling agent and BS-1B bentonite anti-settling agent, and can play a certain role in preventing powder from settling. The invention screens the bentonite of a plurality of manufacturers, wherein the bentonite of a plurality of manufacturers contains a certain quaternary ammonium salt, has a certain catalytic action on-NCO groups in the coating, is not beneficial to the storage stability of the finished coating, and the influence of the three types of bentonite on the storage stability of the coating is small after the screening, so the three types of bentonite are selected as raw materials.
The plasticizer is phthalate plasticizer, and the water content of the plasticizer is required to be less than 0.1%; further preferably, the plasticizer is dibutyl phthalate or diisononyl phthalate. The addition of the plasticizer can improve the elongation of the coating and reduce the viscosity of the finished product so as to facilitate better construction.
The solvent oil is one of S-100 and S-150, and plays a role in reducing the viscosity of the coating and adjusting the surface solid drying time.
The dispersing agent, the defoaming agent, the catalyst, the water absorbent and the latent curing agent are all liquid small materials.
Preferably, the dispersant is one of YRFC-06 and FT-203; the function of dispersing the solid filler into the liquid coating more uniformly to prevent the powder from settling is achieved.
Preferably, the defoaming agent is one of FT-3530 and FT-3680, and can eliminate mechanical bubbles caused by stirring in the preparation process of polyurethane and chemical bubbles caused by reaction in the curing process of a finished product.
Preferably, the catalyst is dibutyltin dilaurate T-12.
Preferably, the water absorbing agent is TI. The water-absorbing agent is often added at the final stage of the production of the coating material, and the storage stability of the coating material can be improved.
Preferably, the latent curing agent is one of LH-102 and LH-104, which plays a role in eliminating reaction bubbles in the coating curing process.
As a general inventive concept, the present invention also provides a method for preparing the anti-settling type mono-component polyurethane waterproof coating with high storage stability, comprising the steps of:
(1) adding mixed polyether polyol, solid filler, pigment, dispersant and anti-settling agent into a reaction kettle, uniformly stirring, heating to 110 ℃ to carry out vacuum dehydration on the materials until the water content of the mixed solution is less than or equal to 0.03 wt%, then cooling to below 40 ℃, adding isocyanate and solvent oil, heating to 70-80 ℃ to react for 1-3h, then adding catalyst, and continuing to react for 0.5-2 h;
(2) and after the reaction is finished, cooling the reaction system to below 50 ℃, adding a plasticizer, stirring for 0.2-1h, sequentially adding a defoaming agent, a water absorbent and a latent curing agent, continuously stirring and carrying out vacuum defoaming on the reaction system to obtain the anti-settling mono-component polyurethane waterproof coating with high storage stability.
Preferably, in the step (1), the vacuum degree of vacuum dehydration is less than-0.09 MPa, and the dehydration time is between 2 and 3 hours.
In the step (2), the vacuum degree of vacuum defoaming is below-0.09 MPa, and the defoaming time is between 0.5 and 1 hour.
Compared with the prior art, the invention has the following beneficial effects:
(1) the storage stability of the finished coating product is improved by introducing the water absorbent, so that the viscosity of the finished coating product is only slightly increased in a long-term storage process, the product quality is improved, the amount of the water absorbent is preferably 0.2-0.8%, the mechanical property of a coating film is influenced by excessive addition, and the effect of preventing the viscosity of the finished product from being increased cannot be realized by too little addition;
(2) according to the invention, through the combined action of the dispersing agent and the anti-settling agent, powder in the coating can be stably dispersed in a liquid sample for a long time without settling, and the product quality is improved.
Detailed Description
The principles and features of the present invention are described below, and the examples are provided for illustration only and are not intended to limit the scope of the invention. The following examples are given by way of illustration of the preparation of the coating materials according to the above procedure.
Example 1
A single-component polyurethane waterproof coating is composed of the following raw materials in parts by weight:
polyether polyol DL-200020 parts, polyether polyol EP-330N 5 parts, isocyanate T804 parts, heavy calcium carbonate 47 parts, dibutyl phthalate 12 parts, solvent oil S-10010 parts, carbon black 0.1 part, dispersant FT-2030.3 parts, defoamer FT-35300.3 parts, catalyst T-120.2 parts, water absorbent TI 0.2 part, 908 bentonite 0.1 part and latent curing agent LH-1040.7 parts.
The preparation method comprises the following steps:
(1) adding polyether polyol DL-2000, polyether polyol EP-330N, heavy calcium carbonate, carbon black and dispersing agents FT-203 and FT 908 bentonite into a reaction kettle, uniformly stirring, heating to 100 ℃, vacuumizing to below-0.09 MPa, carrying out vacuum dehydration on the materials for 2 hours until the water content of the mixed solution is less than or equal to 0.03 wt%, then cooling to below 40 ℃, adding isocyanate T80 and solvent oil S-100, heating to 70 ℃, reacting for 2 hours, then adding a catalyst T-12, and continuing to react for 1 hour;
(2) and after the reaction is finished, cooling the reaction system to below 50 ℃, adding dibutyl phthalate, stirring for 0.5h, sequentially adding a defoaming agent FT-3530, a water absorbent TI and a latent curing agent LH-104, continuously stirring, vacuumizing the reaction system to below-0.09 MPa, and performing vacuum defoaming for 0.5h to obtain the high-storage-stability anti-settling mono-component polyurethane waterproof coating.
Example 2
A single-component polyurethane waterproof coating is composed of the following raw materials in parts by weight:
polyether polyol DL-200018 parts, polyether polyol EP-330N 4 parts, isocyanate T804 parts, heavy calcium carbonate 50 parts, dibutyl phthalate 12 parts, solvent oil S-10010 parts, carbon black 0.1 part, dispersant FT-2030.3 parts, defoamer FT-35300.3 parts, catalyst T-120.2 parts, water absorbent TI 0.2 parts, 908 bentonite 0.1 part and latent curing agent LH-1040.7 parts.
The preparation method comprises the following steps:
(1) adding polyether polyol DL-2000, polyether polyol EP-330N, heavy calcium carbonate, carbon black and dispersing agents FT-203 and FT 908 bentonite into a reaction kettle, uniformly stirring, heating to 100 ℃, vacuumizing to below-0.09 MPa, carrying out vacuum dehydration on the materials for 2 hours until the water content of the mixed solution is less than or equal to 0.03 wt%, then cooling to below 40 ℃, adding isocyanate T80 and solvent oil S-100, heating to 70 ℃, reacting for 2 hours, then adding a catalyst T-12, and continuing to react for 1 hour;
(2) and after the reaction is finished, cooling the reaction system to below 50 ℃, adding dibutyl phthalate, stirring for 0.5h, sequentially adding a defoaming agent FT-3530, a water absorbent TI and a latent curing agent LH-104, continuously stirring, vacuumizing the reaction system to below-0.09 MPa, and performing vacuum defoaming for 0.5h to obtain the high-storage-stability anti-settling mono-component polyurethane waterproof coating.
Example 3
A single-component polyurethane waterproof coating is composed of the following raw materials in parts by weight:
polyether polyol DL-200020 parts, polyether polyol EP-330N 5 parts, isocyanate T804 parts, heavy calcium carbonate 47 parts, dibutyl phthalate 12 parts, solvent oil S-10010 parts, carbon black 0.1 part, dispersant YRFC-060.3 parts, defoaming agent FT-36800.3 parts, catalyst T-120.2 parts, water absorbent TI 0.2 parts, 818 bentonite 0.1 part and latent curing agent LH-1040.7 parts.
The preparation method comprises the following steps:
(1) adding polyether polyol DL-2000, polyether polyol EP-330N, heavy calcium carbonate, carbon black, dispersing agent YRFC-06, 818 bentonite into a reaction kettle, uniformly stirring, heating to 100 ℃, vacuumizing to below-0.09 MPa, carrying out vacuum dehydration on the materials for 2 hours until the water content of the mixed solution is less than or equal to 0.03 wt%, then cooling to below 40 ℃, adding isocyanate T80 and solvent oil S-100, heating to 70 ℃, reacting for 2 hours, then adding catalyst T-12, and continuing to react for 1 hour;
(2) and after the reaction is finished, cooling the reaction system to below 50 ℃, adding dibutyl phthalate, stirring for 0.5h, sequentially adding a defoaming agent FT-3680, a water absorbent TI and a latent curing agent LH-104, continuously stirring, vacuumizing the reaction system to below-0.09 MPa, and performing vacuum defoaming for 0.5h to obtain the high-storage-stability anti-settling mono-component polyurethane waterproof coating.
Comparative example 1
This comparative example differs from example 1 in that: the amount of the added ground calcium carbonate was 47.3 parts, and the amount of the added water absorbing agent TI was 0 part.
Comparative example 2
This comparative example differs from example 1 in that: the amount of heavy calcium carbonate added was 47.3 parts, and the amount of dispersant FT-203 added was 0 part.
Comparative example 3
This comparative example differs from example 1 in that: the amount of heavy calcium carbonate added was 47.1 parts, and the amount of 908 bentonite added was 0 part.
The polyurethane waterproof coatings prepared in the examples and the comparative examples are tested according to GB/T19250-2013, wherein the storage stability test of the finished products is to place the finished products of the coatings in an environment at 50 ℃ for 15 days and observe the viscosity increase condition of the coatings; the finished product settlement experiment is to observe whether powder settles at the bottom of a paint container after the paint is placed in an environment at 50 ℃ for 15 days. The test data are shown in table 1.
TABLE 1 data for performance testing of examples and comparative examples
As can be seen from Table 1, the addition of water-absorbing agent TI to the coating formulation provides a significant improvement in the storage stability of the finished product over that before the addition of water-absorbing agent TI; the dispersing agent and the anti-settling agent can both play a role in preventing powder from settling, and the mixed use effect is better.
The above-described specific embodiments are merely illustrative of the present invention and are not intended to limit the invention as claimed in the claims.
Claims (10)
1. The high-storage-stability anti-settling single-component polyurethane waterproof coating is characterized in that: comprises the following raw materials in percentage by weight:
the mixed polyether polyol is a mixture of 2-functionality polyether polyol and 3-functionality polyether polyol with molecular weight of 2000-5000-.
2. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the mixed polyether polyol is a mixture of polyether polyol DL-2000 and polyether polyol EP-330N, and the mixing mass ratio of the mixed polyether polyol to the polyether polyol is 1.5-3: 1.
3. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the isocyanate is toluene diisocyanate.
4. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the solid filler is one or a mixture of heavy calcium carbonate and talcum powder; the pigment is carbon black; the anti-settling agent is organic bentonite.
5. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the plasticizer is phthalate plasticizer.
6. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the solvent oil is one of S-100 and S-150.
7. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the dispersant is one of YRFC-06 and FT-203; the defoaming agent is one of FT-3530 and FT-3680; the catalyst is dibutyltin dilaurate T-12; the water absorbing agent is TI.
8. The high storage stability anti-settling one-component polyurethane waterproof coating material according to claim 1, wherein: the latent curing agent is one of LH-102 and LH-104.
9. A method for preparing the high storage stability anti-settling one-component polyurethane waterproofing paint according to any one of claims 1 to 8, comprising the steps of:
(1) adding mixed polyether polyol, solid filler, pigment, dispersant and anti-settling agent into a reaction kettle, uniformly stirring, heating to 110 ℃ to carry out vacuum dehydration on the materials until the water content of the mixed solution is less than or equal to 0.03 wt%, then cooling to below 40 ℃, adding isocyanate and solvent oil, heating to 70-80 ℃ to react for 1-3h, then adding catalyst, and continuing to react for 0.5-2 h;
(2) and after the reaction is finished, cooling the reaction system to below 50 ℃, adding a plasticizer, stirring for 0.2-1h, sequentially adding a defoaming agent, a water absorbent and a latent curing agent, continuously stirring and carrying out vacuum defoaming on the reaction system to obtain the anti-settling mono-component polyurethane waterproof coating with high storage stability.
10. The method for preparing the high storage stability anti-settling type mono-component polyurethane waterproof paint according to claim 9, wherein: in the step (1), the vacuum degree of vacuum dehydration is below-0.09 MPa, and the dehydration time is between 2 and 3 hours; in the step (2), the vacuum degree of vacuum defoaming is below-0.09 MPa, and the defoaming time is between 0.5 and 1 hour.
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Cited By (1)
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| CN117946582A (en) * | 2023-12-25 | 2024-04-30 | 福建科顺新材料有限公司 | Composition for polyurethane coating, application of composition, polyurethane coating and preparation method of polyurethane coating |
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