CN110698969A - Novel polyurethane waterproof coating and preparation method thereof - Google Patents
Novel polyurethane waterproof coating and preparation method thereof Download PDFInfo
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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
- C08G18/12—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation 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
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4804—Two or more polyethers of different physical or chemical nature
- C08G18/4812—Mixtures of polyetherdiols with polyetherpolyols having at least three hydroxy groups
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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
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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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
- 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
- C09D7/63—Additives non-macromolecular organic
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Inorganic Chemistry (AREA)
- Polyurethanes Or Polyureas (AREA)
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Abstract
The invention relates to a novel polyurethane waterproof coating and a preparation method thereof, wherein the novel polyurethane waterproof coating consists of a component A and a component B, wherein the component A consists of the following raw materials in parts by weight: 300 portions of polyether N-240200-; the component B comprises the following raw materials in parts by weight: 400 parts of polyether N-330300-; the weight ratio of the component A to the component B is 1: 1-3. The novel polyurethane waterproof coating disclosed by the invention is excellent in various performances, free of solvent and plasticizer, friendly to environment and human bodies, representative of the development trend of ecological environment-friendly waterproof materials, and suitable for popularization and application.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a novel polyurethane waterproof coating and a preparation method thereof.
Background
The polyurethane waterproof material is developed in the 60 th of the 20 th century, and is developed from the initial tar polyurethane waterproof coating to the asphalt polyurethane waterproof coating and the current polyurethane color waterproof coating in China.
At present, the two-component polyurethane waterproof coating for domestic buildings mainly comprises asphalt and solvent type waterproofing, and contains a solvent and a plasticizer, wherein the solvent is added, so that a certain amount of VOC (volatile organic compounds) is generated in the curing process of the product and is released into the atmosphere to cause environmental pollution and is not good for human health, the cost can be reduced by adding the plasticizer into the coating, the tensile strength, toughness, extensibility and other properties of the coating are improved to a certain extent, but the coating has higher process requirements and is easy to oxidize and separate out, and meanwhile, the environmental protection problem caused by the coating is not ignored.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a novel polyurethane waterproof coating and a preparation method thereof. The novel polyurethane waterproof coating has excellent performances, does not contain solvent and plasticizer, and is environment-friendly and human-friendly.
The technical scheme of the invention is as follows:
a novel polyurethane waterproof coating comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight: 300 portions of polyether N-240200-;
the component B comprises the following raw materials in parts by weight: 400 parts of polyether N-330300-;
the weight ratio of the component A to the component B is 1: 1-3.
Preferably, the component A consists of the following raw materials in parts by weight: polyether N-240250, polyether N-3050450 and diphenylmethane diisocyanate 350; the component B comprises the following raw materials in parts by weight: polyether N-330350 parts, coarse whiting 550 parts, antioxidant 2 parts, ultraviolet absorbent 2 parts, toner 15 parts, p-chloroaniline methane 50 parts, and catalyst 3 parts.
Preferably, the antioxidant is a mixture of phosphite antioxidants and hindered phenol antioxidants.
Preferably, the ultraviolet absorbent is any one of 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone and resorcinol monobenzoate.
Preferably, the catalyst is organic bismuth and/or organic zinc.
A method for preparing the novel polyurethane waterproof coating, which comprises the following steps:
(1) preparing a component A: adding polyether N-240 and polyether N-3050 into a reaction kettle, heating to 110 ℃, stirring while vacuumizing, then cooling to 60 ℃, adding diphenylmethane diisocyanate to fully react to obtain a component A;
(2) preparing a component B: adding polyether N-330, heavy calcium carbonate, an antioxidant, an ultraviolet absorbent, toner, p-di-o-chloroaniline methane and a catalyst into a reaction kettle, heating to 100-;
(3) preparing a novel polyurethane waterproof coating: and (3) uniformly mixing and stirring the component A prepared in the step (1) and the component B prepared in the step (2) to obtain the novel polyurethane waterproof coating.
Preferably, in the step (1), the stirring speed is 1000-; the reaction temperature is 70-75 ℃, and the reaction time is 3-5 h.
Preferably, in step (1), the NCOwt% of the A component is 7.5-8.5%, and the A component has a viscosity of 3000-7000cps at 25 ℃.
Preferably, in the step (2), the stirring speed is 2500-.
Preferably, in step (2), the viscosity of the B component at 25 ℃ is 15000-30000 cps.
The invention has the beneficial effects that:
the novel polyurethane waterproof coating is prepared by fully reacting a prepolymer prepared by taking polyether N-240, polyether N-3050 and diphenylmethane diisocyanate as raw materials with polyether N-330, coarse whiting, an antioxidant, an ultraviolet absorbent, toner, p-chloroaniline methane and a catalyst, and is prepared by controlling the excess percentage of the diphenylmethane diisocyanate relative to the polyether (polyether N-240, polyether N-3050 and polyether N-330) and the proportion of difunctional polyether (polyether N-240) to trifunctional polyether (polyether N-3050 and polyether N-330) so that the finally prepared novel polyurethane waterproof coating is short in surface drying and actual drying time, high in solid content, low in curing shrinkage, high in tensile strength and free of solvents and plasticizers, The elongation at break and the tearing strength are both high, the shock resistance is high, and the weather aging resistance is good; the invention has no VOC emission, no free TDI, is environment-friendly and human-friendly, represents the development trend of ecological environment-friendly waterproof materials, and is suitable for popularization and application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention. In the following examples, 1 part by weight represents 1 g.
Example 1
The embodiment provides a novel polyurethane waterproof coating, which consists of a component A and a component B,
the component A comprises the following raw materials in parts by weight: polyether N-240250, polyether N-3050450 and diphenylmethane diisocyanate 350;
the component B comprises the following raw materials in parts by weight: polyether N-330350 parts, heavy calcium carbonate 550 parts, antioxidant (B225)2 parts, ultraviolet absorbent (2-hydroxy-4-N-octoxybenzophenone) 2 parts, toner 15 parts, p-chloroaniline methane 50 parts, and organic zinc catalyst (zinc isooctanoate) 3 parts.
The weight ratio of the component A to the component B is 1: 2.
Further, a method for preparing the novel polyurethane waterproof coating is provided, which comprises the following steps:
(1) preparing a component A: adding polyether N-240 and polyether N-3050 into a reaction kettle, heating to 100 ℃, stirring at the speed of 1000r/min for 1.5h, simultaneously extracting vacuum until the vacuum degree is-0.085 Mp, then cooling to 60 ℃, adding diphenylmethane diisocyanate to fully react for 3h at the temperature of 70-75 ℃ to obtain a component A with the NCOwt% of 7.5% and the viscosity of 5000cps/25 ℃;
(2) preparing a component B: adding polyether N-330, heavy calcium carbonate, an antioxidant (B225), an ultraviolet absorbent (2-hydroxy-4-N-octoxybenzophenone), a toner, p-chloroaniline methane and an organic zinc catalyst (zinc isooctanoate) into a reaction kettle, heating to 100 ℃, stirring at the speed of 2500r/min for 1.5h, simultaneously extracting vacuum to the vacuum degree of-0.085 Mp, and then cooling to obtain a component B with the viscosity of 20000cps/25 ℃;
(3) preparing a novel polyurethane waterproof coating: and (3) uniformly mixing and stirring the component A prepared in the step (1) and the component B prepared in the step (2) to obtain the novel polyurethane waterproof coating.
Example 2
The embodiment provides a novel polyurethane waterproof coating, which consists of a component A and a component B,
the component A comprises the following raw materials in parts by weight: polyether N-240200 parts, polyether N-3050400 parts and diphenylmethane diisocyanate 300 parts;
the component B comprises the following raw materials in parts by weight: polyether N-330300 parts, coarse whiting 500 parts, antioxidant (B225)1 part, ultraviolet absorbent (2-hydroxy-4-methoxybenzophenone) 1 part, toner 10 parts, p-chloroaniline methane 40 parts, and organic bismuth catalyst (DY-20)1 part;
the weight ratio of the component A to the component B is 1: 1.
Further, a method for preparing the novel polyurethane waterproof coating is provided, which comprises the following steps:
(1) preparing a component A: adding polyether N-240 and polyether N-3050 into a reaction kettle, heating to 100 ℃, stirring at the speed of 1000r/min for 1h, simultaneously extracting vacuum until the vacuum degree is-0.085 Mp, then cooling to 60 ℃, adding diphenylmethane diisocyanate to fully react for 3h at the temperature of 70-75 ℃ to obtain a component A with the NCOwt% of 7.5% and the viscosity of 3000cps/25 ℃;
(2) preparing a component B: adding polyether N-330, coarse whiting, an antioxidant (B225), an ultraviolet absorbent (2-hydroxy-4-methoxybenzophenone), a toner, p-chloroaniline methane and an organic bismuth catalyst (DY-20) into a reaction kettle, heating to 100 ℃, stirring for 1h at the speed of 2500r/min, simultaneously vacuumizing to the vacuum degree of-0.085 Mp, and then cooling to obtain a component B with the viscosity of 15000cps/25 ℃;
(3) preparing a novel polyurethane waterproof coating: and (3) uniformly mixing and stirring the component A prepared in the step (1) and the component B prepared in the step (2) to obtain the novel polyurethane waterproof coating.
Example 3
The embodiment provides a novel polyurethane waterproof coating, which consists of a component A and a component B,
the component A comprises the following raw materials in parts by weight: polyether N-240300, polyether N-3050500 and diphenylmethane diisocyanate 400;
the component B comprises the following raw materials in parts by weight: polyether N-330400 parts, heavy calcium carbonate 600 parts, antioxidant (B215)3 parts, ultraviolet absorbent (resorcinol monobenzoate) 3 parts, toner 20 parts, p-chloroaniline methane 60 parts and organic zinc catalyst (KRZN1)5 parts;
the weight ratio of the component A to the component B is 1: 3.
Further, a method for preparing the novel polyurethane waterproof coating is provided, which comprises the following steps:
(1) preparing a component A: adding polyether N-240 and polyether N-3050 into a reaction kettle, heating to 110 ℃, stirring at the speed of 2000r/min for 2h, simultaneously vacuumizing until the vacuum degree is-0.1 Mp, then cooling to 60 ℃, adding diphenylmethane diisocyanate to fully react at 70-75 ℃ for 5h to obtain a component A with the NCOwt% of 8.5% and the viscosity of 7000cps/25 ℃;
(2) preparing a component B: adding polyether N-330, heavy calcium carbonate, an antioxidant (B215), an ultraviolet absorbent (resorcinol monobenzoate), toner, p-chloroaniline methane and an organic zinc catalyst (KRZN1) into a reaction kettle, heating to 110 ℃, stirring for 2 hours at the speed of 3000r/min, simultaneously vacuumizing to the vacuum degree of-0.1 Mp, and then cooling to obtain a component B with the viscosity of 30000cps/25 ℃;
(3) preparing a novel polyurethane waterproof coating: and (3) uniformly mixing and stirring the component A prepared in the step (1) and the component B prepared in the step (2) to obtain the novel polyurethane waterproof coating.
Comparative example 1
The difference from example 1 is only that the composition of the raw material of the component A is different, and the component A of the comparative example consists of the following raw materials in parts by weight: polyether N-240450, polyether N-3050250 and diphenylmethane diisocyanate 350.
Comparative example 2
The difference from example 1 is only that the composition of the raw material of the component A is different, and the component A of the comparative example consists of the following raw materials in parts by weight: polyether N-240250 parts, polyether N-3050450 parts and diphenylmethane diisocyanate 600 parts.
Comparative example 3
The difference from example 1 is only that the composition of the raw material of the component B is different, and the component B of the comparative example consists of the following raw materials in parts by weight: polyether N-330350 parts, heavy calcium carbonate 550 parts, plasticizer DOP 4 parts, toner 15 parts, p-chloroaniline methane 50 parts, and organic zinc catalyst (zinc isooctanoate) 3 parts.
In order to further confirm the effect of the invention, the inventor of the application refers to the GB/T19250-2013 standard to perform various performance tests of the embodiment 1 and the comparative examples 1-3 of the invention, and the results are shown in the table 1:
table 1 results of performance testing
The results show that the ratio between polyether N-240 and polyether N-3050 and the ratio between polyether (polyether N-240 and polyether N-3050) and diphenylmethane diisocyanate, including the dry-out time, the tensile strength, the elongation at break, the tear strength, and the heat shrinkage, are changed, indicating that the ratio of the materials has a significant effect on the properties of the final coating, and further analysis shows that the ratio between the difunctional polyether (polyether N-240) and the trifunctional polyether (polyether N-3050) and the excess percentage of diphenylmethane diisocyanate to the polyether (polyether N-240, polyether N-3050) in the absence of solvent and plasticizer have a significant effect on the physical properties of the coating: the excessive percentage of the diphenylmethane diisocyanate is large, the tensile strength and the tearing strength of the coating are high, the heating shrinkage rate is small, the excessive percentage of the diphenylmethane diisocyanate is small, the tensile strength and the tearing strength of the coating are low, and the heating shrinkage rate is large; the ratio of difunctional polyether to trifunctional polyether is reduced, the surface drying time is shortened, the tensile strength is relatively increased, and the foaming is relatively easy. In addition, the invention obtains various performance indexes equivalent to those of the plasticizer, but the invention has no VOC emission, is more beneficial to the environment and human health, and therefore, is obviously better in the aspect of environmental protection.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A novel polyurethane waterproof coating is characterized by comprising a component A and a component B,
the component A comprises the following raw materials in parts by weight: 300 portions of polyether N-240200-;
the component B comprises the following raw materials in parts by weight: 400 parts of polyether N-330300-;
the weight ratio of the component A to the component B is 1: 1-3.
2. The novel polyurethane waterproof coating material as claimed in claim 1, wherein the component A is prepared from the following raw materials in parts by weight: polyether N-240250, polyether N-3050450 and diphenylmethane diisocyanate 350; the component B comprises the following raw materials in parts by weight: polyether N-330350 parts, coarse whiting 550 parts, antioxidant 2 parts, ultraviolet absorbent 2 parts, toner 15 parts, p-chloroaniline methane 50 parts, and catalyst 3 parts.
3. The novel polyurethane waterproofing coating according to claim 1 wherein the antioxidant is a mixture of a phosphite antioxidant and a hindered phenol antioxidant.
4. The novel polyurethane waterproofing coating according to claim 1, wherein the ultraviolet absorber is any one of 2, 4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone, and resorcinol monobenzoate.
5. The novel polyurethane waterproofing coating according to claim 1, wherein the catalyst is organobismuth and/or organozinc.
6. A process for preparing a novel polyurethane waterproofing coating according to any of claims 1 to 5, comprising the steps of:
(1) preparing a component A: adding polyether N-240 and polyether N-3050 into a reaction kettle, heating to 110 ℃, stirring while vacuumizing, then cooling to 60 ℃, adding diphenylmethane diisocyanate to fully react to obtain a component A;
(2) preparing a component B: adding polyether N-330, heavy calcium carbonate, an antioxidant, an ultraviolet absorbent, toner, p-di-o-chloroaniline methane and a catalyst into a reaction kettle, heating to 100-;
(3) preparing a novel polyurethane waterproof coating: and (3) uniformly mixing and stirring the component A prepared in the step (1) and the component B prepared in the step (2) to obtain the novel polyurethane waterproof coating.
7. The preparation method according to claim 6, wherein in the step (1), the stirring speed is 1000-2000r/min, the stirring time is 1-2h, and the vacuum degree is less than-0.085 Mp; the reaction temperature is 70-75 ℃, and the reaction time is 3-5 h.
8. The method as set forth in claim 6, wherein in the step (1), NCOwt% in the A-component is 7.5 to 8.5%, and the A-component has a viscosity of 3000-7000cps at 25 ℃.
9. The method as claimed in claim 6, wherein in the step (2), the stirring speed is 2500-3000r/min, the stirring time is 1-2h, and the vacuum is applied until the vacuum degree is less than-0.085 Mp.
10. The method according to claim 6, wherein in the step (2), the viscosity of the B component is 15000-30000cps at 25 ℃.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115260892A (en) * | 2022-08-08 | 2022-11-01 | 中油佳汇(广东)防水股份有限公司 | Double-component polyurethane waterproof coating |
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| CN102504166A (en) * | 2011-10-12 | 2012-06-20 | 武汉海源九天新材料有限公司 | Preparation method of hyperbranched water-based polyurethane hydroxy component |
| CN103540254A (en) * | 2013-09-30 | 2014-01-29 | 潍坊市宏源防水材料有限公司 | Preparation method of single-component water-cured polyurethane waterproof paint |
| CN104774551A (en) * | 2015-03-30 | 2015-07-15 | 广西超星太阳能科技有限公司 | Aqueous polyurethane waterproof paint and preparation method thereof |
| CN106010205A (en) * | 2016-07-14 | 2016-10-12 | 四川蜀羊防水材料有限公司 | Environment-friendly polyurethane waterproof coating |
| CN106189762A (en) * | 2016-08-11 | 2016-12-07 | 科顺防水科技股份有限公司 | A kind of stereo set spray polyurea coating |
| CN109354986A (en) * | 2018-11-11 | 2019-02-19 | 浙江锦丰新材料科技有限公司 | A kind of preparation method of quick-dry type one pack system aliphatic Polyurea paint |
| CN109554101A (en) * | 2018-11-15 | 2019-04-02 | 唐山东方雨虹防水技术有限责任公司 | A kind of polyurethane water-proof paint |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115260892A (en) * | 2022-08-08 | 2022-11-01 | 中油佳汇(广东)防水股份有限公司 | Double-component polyurethane waterproof coating |
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