CN107955525B - Construction method for preventing ultraviolet corrosion of polyurethane sealant - Google Patents
Construction method for preventing ultraviolet corrosion of polyurethane sealant Download PDFInfo
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- CN107955525B CN107955525B CN201711206399.9A CN201711206399A CN107955525B CN 107955525 B CN107955525 B CN 107955525B CN 201711206399 A CN201711206399 A CN 201711206399A CN 107955525 B CN107955525 B CN 107955525B
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- polyurethane sealant
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- resistant coating
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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
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- 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
- C09D143/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and containing boron, silicon, phosphorus, selenium, tellurium, or a metal; Coating compositions based on derivatives of such polymers
- C09D143/04—Homopolymers or copolymers of monomers containing silicon
-
- 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
- C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
-
- 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
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention relates to the technical field of sealants, in particular to a construction method for preventing ultraviolet corrosion of a polyurethane sealant. The construction method for preventing the polyurethane sealant from being corroded by ultraviolet rays comprises the following steps: firstly, constructing a polyurethane sealant at a required position; and secondly, after the surface of the polyurethane sealant is dried or completely cured, brushing or spraying a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant. Coatings with uv resistance include: the main body resin, the filler, the silane coupling agent oligomer, the ultraviolet absorbent and the organic solvent. The construction method has the advantage of simple and convenient construction, the ultraviolet-resistant coating on the surface of the polyurethane sealant can effectively prevent the polyurethane sealant from being corroded by ultraviolet rays, and the required unit cost is low, so that the ultraviolet-corrosion-resistant construction method of the polyurethane sealant can improve the weather resistance of the polyurethane sealant, reduce the production cost and ensure that various performances of the sealant are not changed.
Description
Technical Field
The invention relates to the technical field of sealants, in particular to a construction method for preventing ultraviolet corrosion of a polyurethane sealant.
Background
The polyurethane sealant has high tensile strength, excellent elasticity, wear resistance, oil resistance and cold resistance, and is widely used as a caulking sealing material for buildings, squares and roads, and sealing for automobile manufacturing, glass installation, electronic filling, submarines, rockets and the like. However, the weather resistance of the polyurethane sealant is generally poor, and the polyurethane resin can be decomposed by ultraviolet rays after being exposed to the sun for a long time, so that the surface of the sealant is pulverized and cracked. The existing technology for improving the weather resistance of the polyurethane sealant is to add certain ultraviolet absorbers, antioxidants, anti-aging agents and the like into a sealing colloid system, but the addition of the additives can change other properties of the sealant, and the cost is greatly increased.
In view of the weather resistance of the polyurethane sealant, the polyurethane sealant is usually replaced by the silicone sealant and the silicon modified polyether sealant with better weather resistance in the industry, but the strength and the wear resistance of the two sealants are far inferior to those of the polyurethane sealant, the compatibility of the silicone sealant and paint is poor, the cost of the silicon modified polyether sealant is far higher than that of the polyurethane sealant, and more inconvenience and cost increase are brought to the application. Therefore, the technical problem of poor weather resistance of the polyurethane sealant is needed to be solved.
Disclosure of Invention
The invention aims to provide a construction method for preventing ultraviolet corrosion of a polyurethane sealant aiming at the defects of the prior art, and the construction method for preventing ultraviolet corrosion of the polyurethane sealant can improve the weather resistance of the polyurethane sealant, reduce the production cost and ensure the strength and the wear resistance of the sealant.
In order to achieve the purpose, the invention adopts the following technical scheme:
the construction method for preventing the polyurethane sealant from being corroded by ultraviolet rays comprises the following steps:
firstly, constructing a polyurethane sealant at a required position;
step two, after the polyurethane sealant in the step one is dried or completely cured, coating or spraying a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
preferably, the ultraviolet-resistant coating comprises the following components in percentage by weight:
wherein, the ultraviolet-resistant coating layer can also comprise filler, and the filler accounts for 1-15% of the ultraviolet-resistant coating layer by weight.
Wherein, the ultraviolet-resistant coating layer can also comprise pigment, and the pigment accounts for 0.01-1% of the ultraviolet-resistant coating layer by weight.
In the above technical scheme, the main resin is one or a composition of two or more of silicone resin, silane-modified polyether resin, and silicone-modified acrylic resin.
In the technical scheme, the silane coupling agent oligomer is a compound which is obtained by hydrolyzing and condensing a silane coupling agent and has a silane oxygen group.
In the technical scheme, the filler is one or a composition of more than two of heavy calcium carbonate, light calcium carbonate, hollow glass microspheres, talcum powder, rutile type titanium dioxide, silica micropowder, calcined kaolin, diatomite, PVC paste resin or attapulgite.
In the above technical scheme, the organic solvent is one or a composition of more than two of ethyl acetate, butyl acetate, cyclohexanone, xylene or butanone.
In the technical scheme, in the step one, the polyurethane sealant is modified after being constructed at a required position.
In the above technical scheme, in the second step, after the polyurethane sealant in the first step is dried or completely cured, a brush or a spray-washing tool is used to brush or spray a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant.
Compared with the prior art, the invention has the beneficial effects that:
(1) the construction method for preventing the ultraviolet corrosion of the polyurethane sealant has the advantage of simple and convenient construction, the ultraviolet-resistant coating on the surface of the polyurethane sealant can effectively prevent the ultraviolet from corroding the polyurethane sealant, and the required unit cost is low, so the construction method for preventing the ultraviolet corrosion of the polyurethane sealant can improve the weather resistance of the polyurethane sealant, reduce the production cost and ensure that all properties of the sealant are not changed.
(2) According to the construction method for preventing the ultraviolet corrosion of the polyurethane sealant, the ultraviolet-resistant coating which is painted or sprayed on the surface of the polyurethane sealant has good adhesive force with the polyurethane sealant, on one hand, the main resin and the polyurethane have similar structures and reactivity, and on the other hand, the silane coupling agent oligomer and the polyurethane form a covalent bond, so that the ultraviolet-resistant coating and the polyurethane sealant have strong adsorption force.
(3) The construction method for preventing the polyurethane sealant from being corroded by ultraviolet rays has the characteristics of simple method and suitability for industrial large-scale application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1.
The construction method of the polyurethane sealant for preventing ultraviolet corrosion comprises the following steps:
firstly, constructing a polyurethane sealant at a required position;
step two, after the polyurethane sealant in the step one is dried or completely cured, brushing a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant by using a brush;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
in this embodiment, the main resin is a silicone resin.
Wherein, the silane coupling agent oligomer is a compound which is obtained by hydrolyzing and condensing a silane coupling agent and has a silane oxygen group.
In this example, the filler was ground calcium carbonate.
In this example, the organic solvent was ethyl acetate.
Example 2.
The construction method of the polyurethane sealant for preventing ultraviolet corrosion comprises the following steps:
firstly, after the polyurethane sealant is constructed at a required position, modifying the polyurethane sealant;
step two, after the polyurethane sealant in the step one is dried or completely cured, spraying a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant by using a spraying tool;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
in this embodiment, the uv-resistant coating may further include a filler, wherein the filler accounts for 8% by weight of the uv-resistant coating.
In this embodiment, the uv-resistant coating may further include a pigment, wherein the pigment is 0.5% by weight of the uv-resistant coating.
In this embodiment, the main resin is a silane-modified polyether resin.
Wherein, the silane coupling agent oligomer is a compound which is obtained by hydrolyzing and condensing a silane coupling agent and has a silane oxygen group.
In this example, the filler is precipitated calcium carbonate.
In this example, the organic solvent is butyl acetate.
Example 3.
The construction method of the polyurethane sealant for preventing ultraviolet corrosion comprises the following steps:
firstly, after the polyurethane sealant is constructed at a required position, modifying the polyurethane sealant;
step two, after the polyurethane sealant in the step one is dried or completely cured, brushing a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant by using a brush;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
in this embodiment, the uv-resistant coating may further include a filler, and the filler accounts for 1% by weight of the uv-resistant coating.
In this embodiment, the uv-resistant coating may further include a pigment, wherein the pigment is 0.01% by weight of the uv-resistant coating.
In this embodiment, the main resin is a silicone-modified acrylic resin.
Wherein, the silane coupling agent oligomer is a compound which is obtained by hydrolyzing and condensing a silane coupling agent and has a silane oxygen group.
In this example, the filler is a composition of hollow glass beads, talc powder and rutile titanium dioxide.
In this example, the organic solvent is xylene.
Example 4.
The construction method of the polyurethane sealant for preventing ultraviolet corrosion comprises the following steps:
firstly, after the polyurethane sealant is constructed at a required position, modifying the polyurethane sealant;
step two, after the polyurethane sealant in the step one is dried or completely cured, spraying a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant by using a spraying tool;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
in this embodiment, the uv-resistant coating may further include a filler, wherein the filler accounts for 15% by weight of the uv-resistant coating.
In this embodiment, the uv-resistant coating may further include a pigment, wherein the pigment is 1% by weight of the uv-resistant coating.
In this example, the main resin was a composition of a silicone resin and a silane-modified polyether resin.
Wherein, the silane coupling agent oligomer is a compound which is obtained by hydrolyzing and condensing a silane coupling agent and has a silane oxygen group.
In this example, the filler was a composition of fine silica powder, calcined kaolin, diatomaceous earth, PVC paste resin, and attapulgite.
In this example, the organic solvent is a combination of cyclohexanone and xylene.
Example 5.
The construction method of the polyurethane sealant for preventing ultraviolet corrosion comprises the following steps:
firstly, after the polyurethane sealant is constructed at a required position, modifying the polyurethane sealant;
step two, after the polyurethane sealant in the step one is dried or completely cured, brushing a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant by using a brush;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
in this embodiment, the uv-resistant coating may further include a filler, wherein the filler accounts for 4% by weight of the uv-resistant coating.
In this embodiment, the uv-resistant coating may further include a pigment, wherein the pigment is 0.8% by weight of the uv-resistant coating.
In this embodiment, the main resin is a composition of a silicone resin, a silane-modified polyether resin, and a silicone-modified acrylic resin.
Wherein, the silane coupling agent oligomer is a compound which is obtained by hydrolyzing and condensing a silane coupling agent and has a silane oxygen group.
In this example, the filler was a combination of diatomaceous earth, PVC paste resin, and attapulgite.
In this example, the organic solvent is a combination of cyclohexanone, xylene, and butanone.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. The construction method for preventing the polyurethane sealant from being corroded by ultraviolet rays is characterized by comprising the following steps of: it comprises the following steps:
firstly, constructing a polyurethane sealant at a required position;
step two, after the polyurethane sealant in the step one is dried or completely cured, coating or spraying a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant;
the ultraviolet-resistant coating comprises the following components in percentage by weight:
the main resin is one or a composition of more than two of organic silicon resin, silane modified polyether resin or organic silicon modified acrylic resin;
the silane coupling agent oligomer is a compound which is obtained by utilizing a silane coupling agent through hydrolytic condensation and has a silane oxygen group.
2. The polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: the ultraviolet-resistant coating comprises the following components in percentage by weight:
3. the polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: the ultraviolet-resistant coating also comprises filler, and the filler accounts for 1-15 wt% of the ultraviolet-resistant coating.
4. The polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: the ultraviolet-resistant coating also comprises a pigment, wherein the pigment accounts for 0.01-1% of the ultraviolet-resistant coating by weight.
5. The polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: the filler is one or a composition of more than two of heavy calcium carbonate, light calcium carbonate, hollow glass microspheres, talcum powder, rutile titanium dioxide, silicon micropowder, calcined kaolin, diatomite, PVC paste resin or attapulgite.
6. The polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: the organic solvent is one or a composition of more than two of ethyl acetate, butyl acetate, cyclohexanone, xylene or butanone.
7. The polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: in the first step, the polyurethane sealant is modified after being constructed at a required position.
8. The polyurethane sealant construction method for preventing ultraviolet corrosion according to claim 1, wherein: and in the second step, after the polyurethane sealant in the first step is dried or completely cured, a brush or a spray-washing tool is used for brushing or spraying a layer of ultraviolet-resistant coating on the surface of the polyurethane sealant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711206399.9A CN107955525B (en) | 2017-11-27 | 2017-11-27 | Construction method for preventing ultraviolet corrosion of polyurethane sealant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711206399.9A CN107955525B (en) | 2017-11-27 | 2017-11-27 | Construction method for preventing ultraviolet corrosion of polyurethane sealant |
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| CN107955525A CN107955525A (en) | 2018-04-24 |
| CN107955525B true CN107955525B (en) | 2020-04-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666655A (en) * | 2009-11-25 | 2012-09-12 | 大日精化工业株式会社 | Polysiloxane-modified polyhydroxy polyurethane resin, method for producing same, heat-sensitive recording material using the resin, imitation leather, thermoplastic polyolefin resin skin material, material for weather strip, and weather strip |
| CN106987223A (en) * | 2017-04-19 | 2017-07-28 | 常熟市恒信粘胶有限公司 | Polyether-modified structure sealant of high intensity and preparation method thereof |
| CN107057625A (en) * | 2017-01-16 | 2017-08-18 | 广东长鹿精细化工有限公司 | Housing industrialization building sealant and preparation method thereof |
| CN107177340A (en) * | 2017-06-21 | 2017-09-19 | 三友（天津）高分子技术有限公司 | Transparent single component silane modified polyether seal glue of waterproof mould-proof-type and preparation method thereof |
-
2017
- 2017-11-27 CN CN201711206399.9A patent/CN107955525B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102666655A (en) * | 2009-11-25 | 2012-09-12 | 大日精化工业株式会社 | Polysiloxane-modified polyhydroxy polyurethane resin, method for producing same, heat-sensitive recording material using the resin, imitation leather, thermoplastic polyolefin resin skin material, material for weather strip, and weather strip |
| CN107057625A (en) * | 2017-01-16 | 2017-08-18 | 广东长鹿精细化工有限公司 | Housing industrialization building sealant and preparation method thereof |
| CN106987223A (en) * | 2017-04-19 | 2017-07-28 | 常熟市恒信粘胶有限公司 | Polyether-modified structure sealant of high intensity and preparation method thereof |
| CN107177340A (en) * | 2017-06-21 | 2017-09-19 | 三友（天津）高分子技术有限公司 | Transparent single component silane modified polyether seal glue of waterproof mould-proof-type and preparation method thereof |
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| CN107955525A (en) | 2018-04-24 |
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