CN113214697A - Organic silicon foaming connection coating and preparation method thereof - Google Patents
Organic silicon foaming connection coating and preparation method thereof Download PDFInfo
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- CN113214697A CN113214697A CN202110679885.2A CN202110679885A CN113214697A CN 113214697 A CN113214697 A CN 113214697A CN 202110679885 A CN202110679885 A CN 202110679885A CN 113214697 A CN113214697 A CN 113214697A
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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
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1675—Polyorganosiloxane-containing compositions
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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Abstract
The invention provides an organic silicon foaming connecting coating and a preparation method thereof, wherein the preparation method comprises the following steps: preparing the component A and the component B by adopting a high-speed dispersion method, blending the component A, the component B and the component C, and stirring uniformly to obtain a finished product; according to the antifouling matching foaming connection coating taking the hydroxyl organic silicon resin as the main base material, the interface bonding design is utilized to improve the interlayer adhesion between the antirust base coating and the low-surface-energy antifouling coating, and meanwhile, the connection coating is foamed in a chemical foaming manner, so that the elastic modulus of the connection coating is adjusted, the thickness of the coating is improved, and the antifouling performance of the antifouling coating is improved.
Description
Technical Field
The invention relates to the technical field of chemical materials, in particular to an organic silicon foaming connection coating and a preparation method thereof.
Background
The traditional antifouling paint mainly utilizes release of an antifouling agent to inhibit attachment of fouling organisms, but the antifouling agent has a certain destructive effect on marine ecology, and with the enhancement of environmental awareness of countries in the world, development of low-toxicity or nontoxic antifouling paint becomes a development trend of future antifouling paint, wherein novel environment-friendly antifouling paint represented by fouling release type antifouling paint is widely applied due to excellent antifouling performance. However, the resins used in the primer layer and the top coat layer have great difference in structure and performance, so that the matching connection performance between the two materials is poor, and the antifouling coating layer is easy to fall off. Therefore, a connecting coating needs to be coated between the base coating and the surface coating, so that the antifouling and anticorrosive coatings can be connected, and the adhesion between the coatings can be enhanced.
The different antifouling coatings are matched with different connecting coating systems, for example, the connecting paint of the chlorinated rubber antifouling paint used currently is based on chlorinated rubber. At present, commercial fouling release type antifouling paints on the market are few in types, the product technology is mostly mastered by several foreign manufacturers, and SeaLion Topulse series organosilicon low-surface-energy antifouling paints developed by Jotun coating company in Norway are composed of three components. The matched connecting paint SeaLion Tiecoat is also composed of three components, wherein the component A is a base material, the component B is a curing agent, the component C is an accelerator, and the curing volume ratio of the three components is 16.7:0.6: 0.9.
At present, a patent discloses that a resin base material is compounded by epoxy resin and epichlorohydrin or vinyl chloride-vinyl acetate resin; the patent also discloses a preparation method of epoxy acrylic acid connecting paint, but the antifouling paint applicable to the connecting paint disclosed in the 2 patents is mainly abrasion type or self-polishing type antifouling paint, and has poor matching performance for fouling release type antifouling paint taking organic silicon fluororesin as a base material, and the phenomena of paint film foaming and the like are easy to occur after soaking.
The antifouling performance of the fouling release type antifouling paint is related to the elastic modulus of the entire mating coating layer in addition to the surface characteristics thereof, and in order to increase the elastic modulus of the antifouling coating layer, the antifouling performance is generally achieved by increasing the thickness of the antifouling coating layer. In the construction process, at least 2 or more constructions are generally needed to effectively improve the thickness of the antifouling coating, so that the material cost is increased, and the construction cost is also increased.
Disclosure of Invention
In order to solve the problems, the invention provides an organic silicon foaming connecting coating and a preparation method thereof, the foaming connecting coating for antifouling matching takes hydroxyl organic silicon resin as a main base material, the interface bonding design is utilized to improve the interlayer adhesive force between an antirust base coating and a low-surface-energy antifouling coating, and simultaneously, the connecting coating is foamed in a chemical foaming mode, so that the elastic modulus of the connecting coating is adjusted, the thickness of the coating is improved, and the antifouling performance of the antifouling coating is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: a preparation method of an organic silicon foaming connection coating comprises the following preparation steps:
step one, preparation of a component A: the component A comprises the following components in parts by mass: 10-60 parts of hydroxyl organic silicon resin, 1-5 parts of monobasic organic acid, 10-20 parts of pigment and filler, 0.5-1 part of thixotropic agent and 10-20 parts of solvent I; the preparation method of the component A comprises the following steps: according to the mass parts, adding 10-60 parts of hydroxyl organic silicon resin, 1-5 parts of monobasic organic acid and 10-20 parts of solvent I into a reactor, carrying out high-speed dispersion for 15-25 min, adding 10-20 parts of pigment and filler, continuing to disperse for 3-6 h at high speed, adding 0.5-1 part of thixotropic agent, continuing to disperse for 1-3 h at high speed, and filtering and discharging when the fineness of the coating is reduced to 60-80 mu m;
step two, preparation of the component B: the component B comprises the following components in parts by mass: 0.5-5 parts of silane coupling agent, 0.1-0.5 part of catalyst and 5-10 parts of solvent II, wherein the preparation method of the component B comprises the following steps: adding 0.5-5 parts of silane coupling agent, 0.1-0.5 part of catalyst and 5-10 parts of solvent II into a reactor by mass, dispersing at high speed for 4-6 min, and discharging after the materials are uniformly dispersed;
step three, mixing the component A, the component B and the component C according to a mass ratio of 10: 0.8-1.6: blending 0.9-1.3, and uniformly stirring to obtain a finished product.
Furthermore, in the first step, the hydroxyl organic silicon resin is polymethyl siloxane containing hydroxyl at two ends, and the viscosity of the polymethyl siloxane is 2000-20000 cP.
Further, in the step one, the monobasic organic acid is one or a combination of several of formic acid, acetic acid, propionic acid, butyric acid, benzoic acid and salicylic acid.
Further, in the first step, the pigment and filler is one or a combination of more of mica powder, talcum powder, light calcium carbonate, titanium dioxide, precipitated barium sulfate, carbon black and iron black.
Further, in the first step, one or a combination of several of thixotropic agent polyamide wax, organic bentonite and fumed silica.
Further, in the second step, the catalyst is one or a combination of stannous octoate and dibutyltin dilaurate.
Further, in the second step, the silane coupling agent is one or a combination of more of ethyl silicate 28, ethyl silicate 32, ethyl silicate 40, KH560 and KH 550.
Furthermore, the solvent I and the solvent II are one or a combination of more of dimethylbenzene, n-butyl alcohol, butyl acetate, cyclohexanone and ethyl acetate.
Further, the third component is isocyanate, and the isocyanate is one or a combination of several of N3390, N75, Hexamethylene Diisocyanate (HDI), Toluene Diisocyanate (TDI) and diphenylmethane diisocyanate (MDI).
An organosilicon foaming connecting coating which is prepared by the preparation method of any one of claims 1 to 9.
The invention has the beneficial effects that: the invention develops a foaming connection coating for antifouling matching by taking hydroxyl organic silicon resin as a base material and a preparation method thereof, on one hand, the interface bonding design is utilized to improve the interlayer adhesion between an antirust base coating and a low-surface-energy antifouling coating, on the other hand, the connection coating is foamed in a chemical foaming mode, the elastic modulus of the connection coating is adjusted, the coating thickness is increased, and the antifouling performance of the antifouling coating is improved. The connection coating adopts hydroxyl organic silicon resin as a base material, a silane coupling agent with a side chain having an active group as a curing agent, and a composition of isocyanate and acid as a chemical foaming agent, and the foaming connection coating can effectively improve the comprehensive antifouling performance of the antifouling coating, prolong the service life of an anticorrosive antifouling coating system, reduce the construction number of antifouling paints and improve the construction efficiency.
Drawings
FIG. 1 is a graph showing the foaming effect of example 1 of the present invention;
FIG. 2 is a graph showing the foaming effect of example 2 of the present invention;
FIG. 3 is a graph showing the foaming effect in example 3 of the present invention.
Detailed Description
The embodiments of the present invention are described in detail with reference to the accompanying drawings, and the embodiments and specific operations of the embodiments are provided on the premise of the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
A preparation method of an organic silicon foaming connection coating comprises the following preparation steps:
step one, preparation of a component A: the component A comprises the following components in parts by mass: 10-60 parts of hydroxyl organic silicon resin, 1-5 parts of monobasic organic acid, 10-20 parts of pigment and filler, 0.5-1 part of thixotropic agent and 10-20 parts of solvent I; the preparation method of the component A comprises the following steps: according to the mass parts, 10-60 parts of hydroxyl organic silicon resin, 1-5 parts of monobasic organic acid and 10-20 parts of solvent I are added into a reactor, the reactor can be a dispersion pulling cylinder, high-speed dispersion is carried out for 15-25 min, 10-20 parts of pigment and filler are added, high-speed dispersion is continued for 3-6 h, 0.5-1 part of thixotropic agent is added, high-speed dispersion is continued for 1-3 h, and when the fineness of the coating is reduced to 60-80 mu m, the coating is filtered and discharged;
step two, preparation of the component B: the component B comprises the following components in parts by mass: 0.5-5 parts of silane coupling agent, 0.1-0.5 part of catalyst and 5-10 parts of solvent II, wherein the preparation method of the component B comprises the following steps: adding 0.5-5 parts of silane coupling agent, 0.1-0.5 part of catalyst and 5-10 parts of solvent II into a reactor by mass, dispersing at high speed for 4-6 min, and discharging after the materials are uniformly dispersed;
step three, mixing the component A, the component B and the component C according to a mass ratio of 10: 0.8-1.6: blending 0.9-1.3, and uniformly stirring to obtain a finished product.
Further, in the first step, the hydroxyl silicone resin is polymethylsiloxane containing hydroxyl groups at two ends, the viscosity of the polymethylsiloxane is 2000-20000 cP, and the structural formula of the hydroxyl silicone oil is as follows:
wherein n is an integer greater than 1.
Further, in the step one, the monobasic organic acid is one or a combination of several of formic acid, acetic acid, propionic acid, butyric acid, benzoic acid and salicylic acid.
Further, in the first step, the pigment and filler is one or a combination of more of mica powder, talcum powder, light calcium carbonate, titanium dioxide, precipitated barium sulfate, carbon black and iron black.
Further, in the first step, one or a combination of several of thixotropic agent polyamide wax, organic bentonite and fumed silica.
Further, in the second step, the catalyst is one or a combination of stannous octoate and dibutyltin dilaurate.
Further, in the second step, the silane coupling agent is one or a combination of more of ethyl silicate 28, ethyl silicate 32, ethyl silicate 40, KH560 and KH 550.
Furthermore, the solvent I and the solvent II are one or a combination of more of dimethylbenzene, n-butyl alcohol, butyl acetate, cyclohexanone and ethyl acetate.
Further, the third component is isocyanate, and the isocyanate is one or a combination of several of N3390, N75, Hexamethylene Diisocyanate (HDI), Toluene Diisocyanate (TDI) and diphenylmethane diisocyanate (MDI).
An organosilicon foaming connecting coating which is prepared by the preparation method of any one of claims 1 to 9.
The interface bonding process of the connection coating, the epoxy coating and the antifouling coating material is as follows: hydroxyl organic silicon resin in the component A of the connecting paint reacts with a silane coupling agent for curing, and epoxy groups or amino groups of side chains in the silane coupling agent can react with amino groups or epoxy groups in the primer to realize the interface bonding of the connecting coating and the primer; meanwhile, the curing agent silane coupling agent can react with the hydroxyl organic silicon resin in the antifouling surface coating to realize the interface bonding of the connecting coating and the antifouling coating, thereby realizing the good connection between the connecting coating and the primer coating as well as the surface coating.
The foaming process of the connecting coating is as follows: the monobasic organic acid in the component A reacts with the isocyanate in the component C to release carbon dioxide, so that the foaming of the connecting coating is realized, the thickness and the elastic modulus of the connecting coating can be adjusted through the foaming of the connecting coating, the construction thickness of the antifouling coating is effectively reduced, and the comprehensive antifouling performance of the matched coating is improved.
The invention is further illustrated by the following examples in which the amounts of the various materials added are in parts by mass.
Example 1
The ingredients of the component A, the component B and the component C are shown in Table 1, the component A, the component B and the component C are blended according to the ingredient ratio in the Table 1 when the paint is used, construction can be carried out after the paint is uniformly stirred, and the connecting paint can be constructed by adopting the construction processes of brushing, roller coating, high-pressure airless spraying, air spraying and the like.
Example 2
The ingredients of the component A, the component B and the component C are shown in Table 1, the component A, the component B and the component C are blended according to the ingredient ratio in the Table 1 when the paint is used, construction can be carried out after the paint is uniformly stirred, and the connecting paint can be constructed by adopting the construction processes of brushing, roller coating, high-pressure airless spraying, air spraying and the like.
Example 3
The ingredients of the component A, the component B and the component C are shown in Table 1, the component A, the component B and the component C are blended according to the ingredient ratio in the Table 1 when the paint is used, construction can be carried out after the paint is uniformly stirred, and the connecting paint can be constructed by adopting the construction processes of brushing, roller coating, high-pressure airless spraying, air spraying and the like.
The addition amounts of the substances in the examples in Table 1 are parts by mass;
TABLE 1 formulation of jointing varnish for different examples
The organosilicon jointing varnish of the invention is shown in formula 1, formula 2 and formula 3 of the examples, and the curing ratio of the methyl component to the ethyl component to the propyl component is 10:1: 1. Inspecting the matched adhesion with epoxy primer and fouling release type low-surface-energy antifouling paint, wherein the epoxy primer adopts H44-61 epoxy antirust primer of Xiamen Shuangrui paint company, the antifouling paint adopts self-made FG-009 fouling release type antifouling paint, the coating interval of matched coating is 1 day, and GB/T5210 plus 2006 paint and varnish Pull-open method adhesion test is adopted for testing, and the test data is shown in Table 2:
TABLE 2 adhesion of the mating coatings
As can be seen from the data in Table 2, the adhesion force between the organosilicon foaming connecting paint and the primer is basically 2.1-2.5 MPa, and is cohesive failure of the connecting paint, and the adhesion force between the connecting paint and the antifouling paint is 1.7MPa, and is cohesive failure of the antifouling paint, which indicates that the interface adhesion performance between the foaming connecting paint and the primer and the antifouling paint is good.
In order to research the foaming performance of the connection coatings prepared in examples 1 to 3, the connection coatings are sliced, the connection coating slices are tested by a scanning electron microscope for the foaming appearance, the test pictures of examples 1, 2 and 3 correspond to fig. 1, 2 and 3 respectively, and it can be seen from the drawings that the uniform cell structure can be obtained by foaming in a chemical foaming manner, the cell density is gradually increased along with the increase of the content of the foaming agent (isocyanate and monobasic organic acid), and the formed cells are all closed cell structures, so that the permeation of external water molecules can be effectively prevented.
The invention discloses a foaming connection coating for an antifouling matching use and a preparation method thereof, wherein hydroxyl organic silicon resin is used as a base material, on one hand, the interface bonding design is utilized to improve the interlayer adhesion between an antirust base coating and a low-surface-energy antifouling coating, on the other hand, the connection coating is foamed in a chemical foaming mode, the elastic modulus of the connection coating is adjusted, the coating thickness is improved, and the antifouling performance of the antifouling coating is improved. The connection coating adopts hydroxyl organic silicon resin as a base material, a silane coupling agent with a side chain having an active group as a curing agent, and a composition of isocyanate and acid as a chemical foaming agent, and the foaming connection coating can effectively improve the comprehensive antifouling performance of the antifouling coating, prolong the service life of an anticorrosive antifouling coating system, reduce the construction number of antifouling paints and improve the construction efficiency.
The above embodiments are merely to illustrate the technical solutions of the present invention and not to limit the present invention, and the present invention has been described in detail with reference to the preferred embodiments. It will be understood by those skilled in the art that various modifications and equivalent arrangements may be made without departing from the spirit and scope of the present invention and it should be understood that the present invention is to be covered by the appended claims.
Claims (10)
1. A preparation method of an organic silicon foaming connection coating is characterized by comprising the following steps: the preparation method comprises the following preparation steps:
step one, preparation of a component A: the component A comprises the following components in parts by mass: 10-60 parts of hydroxyl organic silicon resin, 1-5 parts of monobasic organic acid, 10-20 parts of pigment and filler, 0.5-1 part of thixotropic agent and 10-20 parts of solvent I; the preparation method of the component A comprises the following steps: according to the mass parts, adding 10-60 parts of hydroxyl organic silicon resin, 1-5 parts of monobasic organic acid and 10-20 parts of solvent I into a reactor, carrying out high-speed dispersion for 15-25 min, adding 10-20 parts of pigment and filler, continuing to disperse for 3-6 h at high speed, adding 0.5-1 part of thixotropic agent, continuing to disperse for 1-3 h at high speed, and filtering and discharging when the fineness of the coating is reduced to 60-80 mu m;
step two, preparation of the component B: the component B comprises the following components in parts by mass: 0.5-5 parts of silane coupling agent, 0.1-0.5 part of catalyst and 5-10 parts of solvent II, wherein the preparation method of the component B comprises the following steps: adding 0.5-5 parts of silane coupling agent, 0.1-0.5 part of catalyst and 5-10 parts of solvent II into a reactor by mass, dispersing at high speed for 4-6 min, and discharging after the materials are uniformly dispersed;
step three, mixing the component A, the component B and the component C according to a mass ratio of 10: 0.8-1.6: blending 0.9-1.3, and uniformly stirring to obtain a finished product.
2. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: in the first step, the hydroxyl organic silicon resin is polymethyl siloxane containing hydroxyl at two ends, and the viscosity of the polymethyl siloxane is 2000-20000 cP.
3. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: in the first step, the monobasic organic acid is one or a combination of more of formic acid, acetic acid, propionic acid, butyric acid, benzoic acid and salicylic acid.
4. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: in the first step, the pigment and filler is one or a combination of more of mica powder, talcum powder, light calcium carbonate, titanium dioxide, precipitated barium sulfate, carbon black and iron black.
5. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: in the first step, one or a combination of more of thixotropic agent polyamide wax, organic bentonite and fumed silica.
6. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: in the second step, the catalyst is one or a combination of stannous octoate and dibutyltin dilaurate.
7. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: in the second step, the silane coupling agent is one or a combination of more of ethyl silicate 28, ethyl silicate 32, ethyl silicate 40, KH560 and KH 550.
8. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: the solvent I and the solvent II are one or a combination of more of dimethylbenzene, n-butyl alcohol, butyl acetate, cyclohexanone and ethyl acetate.
9. The method for preparing the silicone foaming connecting coating according to claim 1, characterized in that: the third component is isocyanate which is one or the combination of more of N3390, N75, Hexamethylene Diisocyanate (HDI), Toluene Diisocyanate (TDI) and diphenylmethane diisocyanate (MDI).
10. An organic silicon foaming connection coating is characterized in that: the coating is prepared by the preparation method of any one of claims 1 to 9.
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2021
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