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CN110964388A - Polyurea modified anti-pollution coating and preparation method and application thereof - Google Patents

Polyurea modified anti-pollution coating and preparation method and application thereof Download PDF

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Publication number
CN110964388A
CN110964388A CN201911265396.1A CN201911265396A CN110964388A CN 110964388 A CN110964388 A CN 110964388A CN 201911265396 A CN201911265396 A CN 201911265396A CN 110964388 A CN110964388 A CN 110964388A
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China
Prior art keywords
agent
coating
parts
paint
pollution
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CN201911265396.1A
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Chinese (zh)
Inventor
李建杰
赵琳
孟昭辉
高鹏
李伟
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Tianjin Colouroad Coating & Chemicals Co ltd
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Tianjin Colouroad Coating & Chemicals Co ltd
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Priority to CN201911265396.1A priority Critical patent/CN110964388A/en
Publication of CN110964388A publication Critical patent/CN110964388A/en
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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
    • C09D127/00—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 at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—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 at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—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 at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • 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
    • C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
    • C08G18/6415—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63 having nitrogen
    • C08G18/6438—Polyimides or polyesterimides
    • 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
    • C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
    • 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
    • C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
    • C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
    • C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
    • C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
    • C08G18/755—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group and at least one isocyanate or isothiocyanate group linked to a secondary carbon atom of the cycloaliphatic ring, e.g. isophorone diisocyanate
    • 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
    • C09D5/1606—Antifouling paints; Underwater paints characterised by the anti-fouling agent
    • C09D5/1637—Macromolecular compounds
    • 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
    • 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
    • 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
    • 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

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
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  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Paints Or Removers (AREA)

Abstract

The invention discloses a polyurea modified anti-pollution coating and a preparation method and application thereof. The coating consists of a main agent and a curing agent, wherein the weight parts of the main agent and the curing agent are 100: 10-100: 40; the thickness of the paint film is 40-60 mu m. The polyurea modified high-pollution-resistance coating does not contain heavy metal and limiting solvent. The new anti-pollution coating improves the solid content of the coating under the construction viscosity and reduces the VOC content. The paint meets the requirement of ultra-long outdoor use of various large public buildings, airports, gymnasiums, large railway bridges, offshore platforms, luxury yachts, plateau buildings, buildings and facilities with high humidity, high cold and the like, and is a long-acting, high-weather-resistance, high-pollution-resistance, self-cleaning high-grade external-use finish paint.

Description

Polyurea modified anti-pollution coating and preparation method and application thereof
Technical Field
The invention belongs to the technical field of polyurea modified fluororesin high-pollution-resistance coatings, and relates to a two-component coating using polyaspartic acid ester resin (polyurea), fluororesin, HDI diisocyanate and IPDI isophorone diisocyanate as curing agents. In particular to a technology of an efficient anti-pollution paint finish paint for large public building facilities, steel structure bridges, luxury yachts and the like, and a preparation method and application thereof.
Background
With the rapid development of economic construction in China, the requirements on coatings are higher and higher for the development of various large public buildings, large bridges, offshore platforms, luxury yachts and other buildings and facilities. An external finish paint with long-acting pollution resistance, self-cleaning property, good comprehensive performance and good matching performance with the middle-bottom paint is needed. The paint has good performance, convenient construction, quick drying, low VOC and environmental protection, and the service life of the paint reaches more than 30 years. Thereby reducing the construction and maintenance under severe environmental conditions such as high altitude, plateau, offshore platform, railway bridge, cold area and the like. The European and American countries and Japan have long service life and application in this respect.
The newly developed polyurea modified high-pollution-resistance fluorine coating is a coating product developed aiming at severe environments such as outdoor high pollution, high weather resistance, high humidity, high cold, sand storm and the like. The product is suitable for outdoor high-solid finish paint matched with steel structures, nonferrous metals, composite materials and middle bottom paint.
Disclosure of Invention
The invention relates to a coating with high pollution resistance requirements for severe environments such as large public buildings, airports, gymnasiums, railway bridges, offshore platforms, luxury yachts, high humidity, high cold, wind sand and the like. The curing agent is composed of a main agent and a curing agent, wherein the weight parts of the main agent and the curing agent are 100: 10-100: 40. the polyurea modified high-pollution-resistance coating uses polyaspartic acid ester resin and fluororesin. Adding materials such as a surfactant, a wetting dispersant, a defoaming agent, a leveling agent, an antiwear agent, an anti-fouling agent, an ultraviolet absorbent, a stabilizer and the like. Then matching HDI diisocyanate and IPDI isophorone diisocyanate, and singly or compositely using a curing agent to prepare the polyurea modified high anti-pollution coating. The high-pressure airless spraying or pressurized air spraying is carried out on the surface of the workpiece through a special double-pipeline paint proportioning machine conveying system. The coating is suitable for coating steel structures, nonferrous metals, composite materials and other substrates matched with epoxy medium primer, polyester medium primer and the like.
The invention utilizes the respective characteristics of the fluororesin and the polyurea resin in the compounding use, improves the curing speed of the product, improves the crosslinking density and density of the product, and improves the weather resistance and the stain resistance of the coating film by using the polyurea resin, the fluororesin and the stain resistant agent. Meanwhile, both the two resins have excellent weather resistance, and meet the technical requirements of external paint of the coating. The dirt resistance, the scratch resistance and the wear resistance of the coating are further improved by introducing the dirt resistance agent, the scratch resistance agent and the high-fluorine surface auxiliary agent. By adding the polyurea resin, the solid content of the coating is improved, and the VOC content is effectively reduced. By adding the polyurea resin, the curing speed of the coating is improved, the paint construction period is effectively improved, and the construction efficiency is improved.
The HDI hexamethylene diisocyanate and IPDI isophorone diisocyanate elastic curing agent are compounded and used in different proportions. The coating can be adjusted between rigidity and elasticity according to performance requirements by compounding according to different proportions, and the requirements of different environmental conditions on the performance of the coating are met.
By optimizing and reasonably using the surfactant and the flatting agent, the paint film has flat appearance, moderate luster and excellent appearance decoration, so that the paint film has loose coating, good mechanical property and good decoration.
The invention aims to use a new material anti-fouling agent and an elastic curing agent through modification of polyurea resin. The paint film has the advantages of quick drying, pollution resistance, graffiti resistance, acid rain resistance, balance of rigidity and elasticity of the paint film, and high humidity and severe cold environment applicability. The use of new materials and new technologies greatly improves the coating environment and improves the working efficiency. The polyurea modified high-pollution-resistance coating is a coating product developed aiming at the high requirements of aging resistance, pollution resistance, severe environment, long-acting outdoor use and self-cleaning. The service life of the paint is more than 30 years.
The polyurea modified high-pollution-resistance coating is conveyed by a double-pipeline paint proportioning machine, is mixed before a gun, can be constructed at low temperature and quickly cured, and has flat paint film coating, excellent pollution resistance, ageing resistance and chemical resistance when the paint film thickness is 40-60 mu m.
To achieve the above object, the present invention discloses the following technical contents
The polyurea modified high-pollution-resistance coating is characterized by comprising a main agent and a curing agent, wherein the weight parts of the main agent and the curing agent are 100: 10-100: 40; the thickness of a paint film is 40-60 mu m; the main agent and the curing agent respectively comprise the following raw materials in parts by weight:
a main agent:
10-40 of fluororesin
Aspartic acid ester resin 5-20
Pigments 2 to 30
0 to 10 portions of filler
0 to 8 portions of delustering agent
0.2-1.0 parts of leveling agent
Wetting dispersant 0.3-1.0
Defoaming agent 0.2-1.0
Anti-fouling agent 2-5
3-10 parts of antiwear agent
Ultraviolet absorbent 2-8
15-30 parts of solvent
Curing agent:
HDI hexamethylene diisocyanate prepolymer 5-25
IPDI isophorone diisocyanate elastic prepolymer 0-40
0.5-1.5% of stabilizer
The matting agent in the main agent comprises: PERGOPAK (M2 … M4), Grace ED30, ED40 or Texas OK-412, OK-512; the leveling agent is: BYK-306, BYK-323, BYK-333, DISPARLON LHP-95, EFKA3239, or EFKA 3777; the wetting dispersant is: EFKA PU4061, DISPARLON DA325, BYK-163, or tego 260; defoaming agents BYK-141, HD-106 (made by China), DISPARLON P-420, SPX-35 or EFKA2021, EFKA 2022; anti-fouling agent: japan Dajin L-5F, TEGO 5000N; an antiwear agent: MOMENTIVE COATOSIL DRa10, PGI- (10 … 40), or trilobal SST-3D; UV absorbers Pasfu or Taiwan permanent light (Taiwan);
the anti-fouling agent 1 is Japan damagin L-5F
Antifoulant 2 is TEGO 5000N
The pigment in the main agent is mainly titanium dioxide, and comprises: coloring pigments such as carbon black, phthalocyanine blue, weatherable organic yellow, basf 254 organic red, 170 red, and iron red; the filling material is mainly precipitated barium sulfate, and comprises products of different models made in China and imported.
The curing agent HDI diisocyanate is: n75, N3900, HI-100, HT-100, C-HXR; IPDI isophorone diisocyanate SP-103S, GB905A-90, GB102-75 and Bayer 3800; the stabilizer is: TI water absorption stabilizer.
The solvent comprises: xylene, heavy aromatics, ethyl acetate, butyl acetate, propylene glycol butyl ether, propylene glycol methyl ether acetate (PMA), ethyl 3-ethoxypropionate (EEP).
Wherein the weight parts determined by the main agent and the curing agent are preferably 100: 10-100: 40. According to a formula of selecting different curing agent proportion combinations, the equivalent resin values in the paint are different, and the determined weight parts are 100: 10-100: 40. Particularly preferred four groups of mixture ratios are 100 parts by weight: 15; 100: 20; 100: 30; 100: 40.
wherein the solvent is preferably the following raw materials in parts by weight:
50-70 parts of dimethylbenzene
Heavy aromatic S-1000-10
20-30 parts of butyl acetate
PMA 0-5
EEP 0-5。
The invention further discloses a preparation method of the polyurea modified high-pollution-resistance coating, which is characterized by comprising the following steps:
(1) preparing a main agent:
A. preparing resin: adding polyaspartic acid ester resin, fluororesin, anti-fouling agent 1 and 70% of solvent in the formula into a reaction kettle, screwing down a kettle cover, introducing circulating water into a condenser, stirring for 20-30min at room temperature until the resin is uniformly stirred and mixed for later use.
B. Grinding the paint slurry: adding the prepared resin, respectively adding a defoaming agent, a wetting agent, a pigment and a filler, adjusting to the required viscosity by using a solvent, stirring for 20-30min, grinding for 2-4 times by using a sand mill until the fineness is below 20 mu m, and detecting the solid for later use.
C. Preparing paint: respectively adding the paint paste (the paint paste is used according to the solid part conversion), the defoaming agent, the flatting agent, the ultraviolet absorbent, the antiwear agent, the delustering agent and the anti-fouling agent according to the formula amount 2, stirring at a high speed for 30-60min until the solid part is 70 +/-1%, coating the mixture at a viscosity of-4 cups for 40-60S, and adjusting the mixture with a small amount of color paste until the color of the color card reaches the technological requirement index.
(2) Preparation of a curing agent: mixing the HDI diisocyanate, the IPDI isophorone diisocyanate, the stabilizer TI and the solvent according to the weight parts, stirring uniformly, adjusting the viscosity and the solid parts according to the process requirements, filtering and packaging.
(3) The polyurea modified high-pollution-resistance coating is prepared by the following steps: when in use, the main agent and the curing agent which are respectively packaged are mixed according to the ratio of 100: 10-100: 40 (according to the package mark) and the paint conveying system of the double-pipeline paint proportioning machine adopts high-pressure airless spraying or pressurized air spraying for coating construction.
The invention further discloses a matching application of the polyurea modified high-pollution-resistance coating in applying steel structures, nonferrous metals and composite materials to epoxy insole painting and polyester insole painting. The test results prove that: the polyurea modified high anti-pollution coating introduces new materials of anti-pollution agents and anti-wear agents, and greatly improves the weather resistance and anti-pollution performance of the coating. The introduction of the polyurea resin greatly improves the compactness of the coating so as to further improve the pollution resistance, and simultaneously reduces the system viscosity, improves the solid content of the coating and reduces the VOC content.
The invention mainly introduces polyurea resin, selects new material anti-fouling agent, and improves paint conveying system and coating process, so that the product can be popularized and applied. The main difficulty is that the resin is cured quickly and difficultly; the surfactant with high efficiency and excellent anti-pollution performance is selected, so that the aging resistance and the anti-pollution performance of the surfactant are greatly improved, and a paint film has a self-cleaning function; the high-efficiency wear-resistant and scratch-resistant agent improves the impact and abrasion of the paint film caused by wind and sand in a severe environment, and prolongs the service life of the paint film. By optimizing and matching the coating, the function of the coating is fully utilized, the service life of the coating is greatly prolonged, and the service life can reach 30 years.
Compared with the prior art, the polyurea modified high-pollution-resistance coating disclosed by the invention has the positive effects that:
(1) the polyurea modified high-pollution-resistance coating fills up the domestic blank, and meets the requirements of large public facilities, steel structure bridges, luxury yachts and the like on the coating, and the coating product has the advantages of good pollution resistance, self cleaning, long service life, good decoration, no maintenance and high performance.
(2) The polyurea modified high-pollution-resistance coating does not contain heavy metal and limiting solvent. The use of new materials and new technologies can quickly dry the paint and improve the schedule and the working efficiency of the construction period. Greatly reduces the VOC content and improves the coating environment.
(3) The polyurea modified high-pollution-resistance coating is suitable for coating materials comprising: coating steel structure, nonferrous metal, engineering plastics, composite materials and other substrates coated by the epoxy resin system midsole coating and the polyester resin system midsole coating.
Detailed Description
The invention is described below by means of specific embodiments. Unless otherwise specified, the technical means used in the present invention are well known to those skilled in the art. In addition, the embodiments should be considered illustrative, and not restrictive, of the scope of the invention, which is defined solely by the claims. It will be apparent to those skilled in the art that various changes or modifications in the components and amounts of the materials used in these embodiments can be made without departing from the spirit and scope of the invention. The raw materials and reagents used in the present invention are commercially available.
Specifically, the following are mentioned: flatting agents BYK-306, BYK-323, BYK-333, EFKA3239, EFKA3777 and DISPARLON LHP-95; defoaming agents BYK-141, HD-106, DISPARLON P-420, SPX-35 or EFKA2021, EFKA 2022; the wetting agent dispersant is: DISPARLON DA325, BYK-163, tego260, or EFKA PU 4061; an antiwear agent: MOMENTIVE COATOSIL DRa10, PGI- (10 … 40), or trilobal SST-3D; a flatting agent: PERGOPAK (M2 … M4), Grace ED30, ED40 or degussa OK-412, OK-512. UV absorbers Pasfu or Taiwan permanent light (Taiwan); anti-fouling agent: japan Dajin L-5F, TEGO 5000N; wherein EFKA represents Effka (BASF corporation), DISPARLON represents Nanmu corporation, BYK represents Bick chemical, TEGO represents Digao corporation, degussa represents Degussa corporation, MOMENTIVE represents Myographical corporation. TI water-absorbing stabilizers, and other reagents, auxiliaries, resins, pigments, curing agents, etc. used are commercially available unless otherwise specified. That is, the chemical reagents for preparing the present invention are either commercially available or can be easily prepared by known methods.
The parts referred by the invention can be grams and kilograms, which are mainly selected according to the actual requirements of production.
Example 1
The process comprises the following steps:
a main agent: mixing (adding resin, an anti-fouling agent 1, a solvent, a wetting dispersant and a defoaming agent) → stirring → adding pigment, filling → grinding until the fineness is qualified → mixing paint (adding a flatting agent, an anti-wear agent, a color-finding paste, a defoaming agent, a leveling agent, an anti-fouling agent 2, an ultraviolet absorbent and a solvent) → adjusting the viscosity, detecting the solid part → filtering and packaging.
Curing agent: ingredients (adding curing agent, solvent and water absorbent) → stirring uniformly → adjusting viscosity and solid portion → detecting qualified → filtering and packaging.
Ratio of main raw materials
A main agent: curing agent =100:15
A main agent:
polyaspartic acid ester resin 5.0 parts
Fluororesin 32.0 parts
Titanium white R-70625.0 parts
Filler Blanc Fixe F5.0 parts
LHP-950.4 parts of flatting agent
Wetting dispersant BYK-1630.8 parts
Defoaming agent SPX-350.4 parts
11.5 parts of anti-fouling agent
21.5 parts of anti-fouling agent
Antiwear agent SST-3D 3.5 parts
Flatting agent PERGPAK M33.5 parts
21.4 parts of solvent
Wherein the solvent:
xylene (12.0 parts)
Butyl acetate 4.4 parts
Heavy aromatic S-1003.0 parts
PMA 2.0 parts
Curing agent:
HI-1009.5 parts
3.5 parts of dimethylbenzene
1.5 portions of butyl acetate
0.5 portion of stabilizer (TI water absorption stabilizer)
Example 2
The process comprises the following steps: same as example 1
Ratio of main raw materials
A main agent: curing agent =100:20
A main agent:
polyaspartic acid ester resin 7.0 parts
38.0 parts of fluororesin
Titanium white R-70624.5 parts
0.5 portion of carbon black (soft black)
LHP-950.4 parts of flatting agent
Wetting dispersant BYK-1630.8 parts
Defoaming agent SPX-350.4 parts
11.5 parts of anti-fouling agent
21.0 parts of anti-fouling agent
Antiwear agent SST-3D 3.0 parts
Flatting agent PERGOPAK M33.0 parts
19.9 portions of solvent
Wherein the solvent:
xylene 12.5 parts
Butyl acetate 5.4 parts
PMA 2.0 parts
Curing agent:
HI-10012.8 parts
4.7 parts of dimethylbenzene
2.0 parts of butyl acetate
0.5 portion of stabilizer (TI water absorption stabilizer)
Example 3
The process comprises the following steps: same as example 1
Ratio of main raw materials
A main agent: curing agent =100:30
A main agent:
polyaspartic acid ester resin 17.0 parts
Fluororesin 28.3 parts
Titanium white R-70615.0 parts
Phthalein blue BGS 1.5 parts
Leveling agent BYK-3230.3 parts
40610.8 parts of wetting dispersant
Defoaming agent DISPARLON P-4200.4 parts
11.5 parts of anti-fouling agent
21.2 parts of anti-fouling agent
5.0 portions of antiwear agent SST-3D
Matting agent ED 303.5 parts
25.5 parts of solvent
Wherein the solvent:
15.8 parts of dimethylbenzene
6.7 parts of butyl acetate
PMA 1.0 part
EEP 2.0 parts
Curing agent:
HI-10014.8 parts
N38005.2 parts
6.7 parts of dimethylbenzene
2.8 parts of butyl acetate
0.5 portion of stabilizer (TI water absorption stabilizer)
Example 4
The process comprises the following steps: same as example 1
Ratio of main raw materials
A main agent: curing agent =100:40
A main agent:
12.0 parts of aspartate resin
Fluororesin 40.0 part
Red 1708.0 parts
7.7 parts of filler Blankec Fixe F
LHP-950.5 parts of flatting agent
Wetting dispersant BYK-1630.6 parts
Wetting dispersant Efka PU 40610.3 parts
Defoaming agent DISPARLON P-4200.4 parts
11.0 parts of anti-fouling agent
21.3 parts of anti-fouling agent
5.0 portions of antiwear agent SST-3D
Flatting agent PERGPAK M34.0 parts
Anti-settling agent R-9721.5 parts
17.7 parts of solvent
Wherein the solvent:
9.9 portions of dimethylbenzene
Butyl acetate 4.3 parts
PMA 2.0 parts
EEP 1.5 parts
Curing agent:
HI-10016.2 parts
SP-103S 10.0 parts
9.3 parts of dimethylbenzene
Butyl acetate 4.0 parts
0.5 portion of stabilizer (TI water absorption stabilizer)
Examples 1-4 methods for preparing polyurea modified high stain resistant coatings comprising the steps of:
(1) preparing a main agent:
A. preparing resin: adding the polyurea resin, the fluororesin, the anti-fouling agent 1 and 70% of solvent in the formula into a reaction kettle, screwing down a kettle cover, introducing circulating water into a condenser, stirring for 20-30min at room temperature until the resin is uniformly stirred and mixed for later use.
B. Grinding the paint slurry: adding the prepared resin, respectively adding a defoaming agent, a wetting agent, a pigment, an anti-settling agent and a filler, adjusting to the required viscosity by using a solvent, grinding for 2-4 times by using a sand mill until the fineness is below 20 mu m, and detecting the solid content. And (5) standby.
C. Preparing paint: respectively adding the paint paste (the paint paste is used according to the conversion of solid parts), the defoaming agent, the flatting agent, the ultraviolet absorbent, the antiwear agent, the flatting agent and the anti-fouling agent according to the formula amount 2, stirring at a high speed for 30-60min until the solid parts are 60 +/-1%, coating the viscosity for-4 cups, and adjusting the color of the color card to meet the technological requirement index by using a small amount of color paste after 40-60S; (can be adjusted within a certain range according to the existing coating equipment and process parameters).
(2) Preparation of a curing agent: mixing the HDI diisocyanate, the IPDI isophorone diisocyanate, the stabilizer TI and the solvent according to the weight parts, stirring uniformly, adjusting the viscosity and the solid parts according to the process requirements, filtering and packaging;
(3) the polyurea modified high anti-fouling coating comprises the following components in percentage by weight: respectively packaging the main agent and the curing agent in a ratio of 100: 10-100: and 40 (according to package marks) converting the weight parts into volume ratio marks (according to package marks).
Example 5
And (3) practical use:
the separately packaged base and curing agent prepared in example 2 was mixed at a ratio of 100:20 parts by weight of the paint is subjected to index test. As a result: the appearance of the paint film is as follows: leveling and smoothing; adhesion (cross-cut method) mm: level 0; hardness: 2H; flexibility: 1 mm; impact: 50 cm; graffiti resistance type C: passing; water resistance 480 h: paint filmNo cracking, no falling off and 2mm and 0 grade division; acid resistance: h2SO40.05mol/L48h, no bubble, rust, slight light loss, 1mm 0 grade of grid division; alkali resistance: NaOH is 0.1mol/L48h, no bubble and rust are generated, and the grid is divided into 1mm 0 grade; oil resistance (93 # gasoline) 8 h: the paint film does not wrinkle, crack or fall off (according to the product requirement); wear resistance: 1000g/1000 rev, not more than 20 mg: moisture and heat resistance 240 h: the paint film is intact, and the size is 2mm and 0 grade; high and low temperature tests: -40 ℃ to 80 ℃ for 30 cycles: the paint film is intact, and the size is 2mm and 0 grade; heat aging resistance: 80 ℃/30d, and the light loss rate of a paint film is less than 10 percent; salt spray resistance: 2000h (matched coating): the paint film has no bubble, rust and shedding, the rust and the foaming on one side of the scribing line are not more than 2mm, and the scribing grid is 2mm and 0 grade; the aging resistance is 2000h, the light loss rate is not more than 15%, the color difference is not more than 3, and the product meets the design requirements.
The polyurea modified high-wear-resistant coating for the vehicle prepared by the invention has the following detection indexes:
1. main technical parameters
Figure 64845DEST_PATH_IMAGE001
2. Main performance index
Figure 591641DEST_PATH_IMAGE002
Figure 57257DEST_PATH_IMAGE003
3. The polyurea modified high-pollution-resistance coating prepared by the invention has the following excellent characteristics:
3.1, the polyurea modified high-pollution-resistance coating has the service life of 30 years with the matched coating of the epoxy middle coating.
3.2, the polyurea modified high-pollution-resistance coating has a self-cleaning function, so that the building can be kept clean for a long time, and is more attractive and beautiful. The building block is widely applied to permanent buildings in airports, gymnasiums, superstores, railway bridges, offshore platforms, luxury yachts, plateaus and high-humidity and high-cold areas.
3.3, through research on the coating, the introduction of a new material anti-fouling agent delays the erosion of the coating film in severe environments such as bird droppings corrosion, acid rain corrosion and the like in natural environment. Meanwhile, the shoulder has the scrawling resistance function.
3.4, the wear resistance, sand resistance and scratch resistance of the resin are further improved by matching the polyurea modified fluororesin, the new material anti-wear agent and the curing agent in terms of a resin structure and the addition of the functional anti-wear agent, and the service life of large facilities such as public buildings, bridges and the like is protected.
3.5, the viscosity of a coating system is reduced and the solid content of the coating under the construction viscosity is improved by using the polyurea modified resin, so that the VOC content is reduced, and the coating is more environment-friendly and safer.
3.6, the polyurea modified high-pollution-resistance coating has good rapid curing capability, improves the working efficiency, saves energy, reduces consumption and shortens the construction period.

Claims (7)

1. The polyurea modified anti-pollution coating is characterized by comprising a main agent and a curing agent, wherein the weight parts of the main agent and the curing agent are 100: 10-100: 40; the thickness of a paint film is 40-60 mu m; the main agent and the curing agent respectively comprise the following raw materials in parts by weight:
a main agent:
10-40 of fluororesin
Aspartic acid ester resin 5-20
Pigments 2 to 30
0 to 10 portions of filler
0 to 8 portions of delustering agent
0.2-1.0 parts of leveling agent
Wetting dispersant 0.3-1.0
Defoaming agent 0.2-1.0
Anti-fouling agent 2-5
3-10 parts of antiwear agent
Ultraviolet absorbent 2-8
15-30 parts of solvent
Curing agent:
HDI hexamethylene diisocyanate prepolymer 5-25
IPDI isophorone diisocyanate elastic prepolymer 0-40
0.5-1.5% of stabilizer;
the matting agent in the main agent comprises: PERGOPAK (M2 … M4), Grace ED30, ED40 or Texas OK-412, OK-512; the leveling agent is: BYK-306, BYK-323, BYK-333, DISPARLON LHP-95, EFKA3239, or EFKA 3777; the wetting dispersant is: EFKA PU4061, DISPARLON DA325, BYK-163, or tego 260; defoaming agents BYK-141, HD-106, DISPARLON P-420, SPX-35 or EFKA2021, EFKA 2022; anti-fouling agent: japan Dajin L-5F, TEGO 5000N; an antiwear agent: MOMENTIVE COATOSIL DRa10, PGI- (10 … 40), or trilobal SST-3D; UV absorbers Pasfu or Taiwan permanent light (Taiwan);
the pigment in the main agent is mainly titanium dioxide, and comprises: coloring pigments such as carbon black, phthalocyanine blue, weatherable organic yellow, basf 254 organic red, 170 red, and iron red; the filler is mainly precipitated barium sulfate and comprises products of different models made in China and imported;
the curing agent HDI diisocyanate is: n75, N3900, HI-100, HT-100, C-HXR; IPDI isophorone diisocyanate SP-103S, GB905A-90, GB102-75 and Bayer 3800; the stabilizer is: a TI water absorption stabilizer;
the solvent comprises: xylene, heavy aromatics, ethyl acetate, butyl acetate, propylene glycol butyl ether, propylene glycol methyl ether acetate (PMA) or ethyl 3-ethoxypropionate (EEP).
2. The polyurea modified anti-fouling coating of claim 1, wherein the base agent and the curing agent are present in 100 parts by weight: 15-100: 20.
3. The polyurea modified anti-fouling coating of any one of claims 1-2, wherein the solvent is selected from the group consisting essentially of the following raw materials in parts by weight:
50-70 parts of dimethylbenzene
Heavy aromatic S-1000-10
20-30 parts of butyl acetate
PMA 0-5
EEP 0-5。
4. A method for preparing the polyurea modified anti-pollution coating material according to any one of claims 1 to 3, which comprises the following steps:
(1) preparing a main agent:
A. preparing resin: adding polyaspartic acid ester resin, fluororesin, anti-fouling agent 1 and 70% of solvent in the formula into a reaction kettle, screwing down a kettle cover, introducing circulating water into a condenser, stirring for 20-30min at room temperature until the resin is uniformly stirred and mixed for later use;
B. grinding the paint slurry: adding the prepared resin, respectively adding a defoaming agent, a wetting agent, a pigment and a filler, adjusting to the required viscosity by using a solvent, stirring for 20-30min, grinding for 2-4 times by using a sand mill until the fineness is below 20 mu m, and detecting the solid for later use;
C. preparing paint: respectively adding the paint paste (the paint paste is used according to the solid part conversion), the defoaming agent, the flatting agent, the ultraviolet absorbent, the antiwear agent, the delustering agent and the anti-fouling agent according to the formula amount 2, stirring at a high speed for 30-60min until the solid part is 70 +/-1%, coating the paint at a viscosity of-4 cups for 40-60S, and adjusting the color of the color card to meet the technological requirement index by using a small amount of color paste;
(2) preparation of a curing agent: mixing the HDI diisocyanate, the IPDI isophorone diisocyanate, the stabilizer TI and the solvent according to the weight parts, stirring uniformly, adjusting the viscosity and the solid parts according to the process requirements, filtering and packaging;
(3) the polyurea modified high-pollution-resistance coating is prepared by the following steps: when in use, the main agent and the curing agent which are respectively packaged are mixed according to the ratio of 100: 10-100: 40 (according to the package mark) and the paint conveying system of the double-pipeline paint proportioning machine adopts high-pressure airless spraying or pressurized air spraying for coating construction.
5. Use of the polyurea modified anti-fouling coating of any one of claims 1 to 3 in a matched topcoat for use as a basecoat in epoxy systems and as a basecoat in polyester systems; the epoxy system and the polyester system are applied to the surface of a substrate comprising: coating steel structure, nonferrous metal, composite material and engineering plastic substrate.
6. The polyurea modified anti-pollution coating material as claimed in any one of claims 1 to 3, which is a long-acting, self-cleaning coating material with extremely high requirements on aging resistance, pollution resistance and use in severe environment, and the service life of the polyurea modified anti-pollution coating material is more than 30 years.
7. The use according to claim 5, wherein the coating is applied to the surface of the workpiece by high pressure airless spraying or pressurized air spraying via a dedicated dual-line paint proportioning machine delivery system.
CN201911265396.1A 2019-12-11 2019-12-11 Polyurea modified anti-pollution coating and preparation method and application thereof Pending CN110964388A (en)

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