CN107142002B - A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength and preparation method thereof - Google Patents
A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength and preparation method thereof Download PDFInfo
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- CN107142002B CN107142002B CN201710431662.8A CN201710431662A CN107142002B CN 107142002 B CN107142002 B CN 107142002B CN 201710431662 A CN201710431662 A CN 201710431662A CN 107142002 B CN107142002 B CN 107142002B
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/08—Polyurethanes from polyethers
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- 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
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- 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
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- 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
- C09D5/08—Anti-corrosive paints
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G2150/90—Compositions for anticorrosive coatings
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- 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
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Abstract
A kind of anti-cavitation polyurethane elastomer coat category paint field of high-adhesive-strength of the present invention, the present invention is made of polyurethane resin and two component of cold cure agent, the polyurethane resin, it is made of diisocyanate, dihydric alcohol and polyisocyanates, the cold cure agent is made of polynary amine polymer, polyhydric alcohol polymer, deicer, adhesion promoter, catalyst and pigments and fillers；Polyurethane resin and cold cure agent are uniformly mixed according to the ratio, using modes such as blade coating, brushing, roller coating and sprayings, it is applied over the hydraulic flow passage components metallic substrate surface by blasting treatment, after dry solidification 24 hours, i.e., the anti-cavitation polyurethane elastomer coat of high-adhesive-strength is obtained on hydraulic flow passage components surface.
Description
Technical field
A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength of the present invention and preparation method thereof, belongs to paint field,
More particularly to no-solvent polyurethane elastomer coatings.
Background technique
Cavitation erosion is a kind of failure mode generally existing in waterwork and hydraulic operational process, and it is rotten that it belongs to abrasion
Erosion a kind of special shape, be due to flow passage components near bubble acutely crumble and fall moment generation high-pressure shocking wave or high speed it is micro-
Jet stream, high frequency attack flow passage components outer surface locally occur biggish plastic deformation in outer surface, material surface are caused to produce
It is raw broken, it forms etch pit and exposes new substrate.As the cavitation erosion time increases, etch pit is gradually increased increasing deeply, when etch pit extends
After to a certain extent, flow passage components will be broken, so that the production and living of people are caused with the economic loss for being difficult to estimate
And casualties.
Cavitation erosion seriously constrains the development of water conservancy machinery and waterwork, currently, in addition to utilizing CAD, system
It makes and meets hydromechanical flow passage components and avoid occurring outside the service condition of cavitation phenomenon, can also have by exploitation excellent
The new material of cavitation resistive property, or by being surface-treated to overcurrent position, the comprehensive performance of substrate surface is improved, with
Effectively solve the cavitation problem of flow passage components.
In recent years, with the development of process for treating surface, and the development with good anti-cavitation performance coating, pass through
Process for treating surface greatly improves the anti-cavitation corrosion of flow passage components, extends the service life of flow passage components.Surface laser
Modification, surface plasma modification, thermal spraying on surface, surface carburization and built-up welding etc. are the process for treating surface being commonly used.These
The surface treatment process method for improving anti-cavitation corrosion is complicated, and coating higher cost requires sternly working environment and operation level
Lattice, it is difficult to which after being used in large-scale workpiece surface and coating damage, repairing is relatively difficult, is difficult to promote the use of a large area.
Anti-cavitation macromolecule organic-containing materials price is lower, good to the applicability of various substrates, and site operation is convenient, no
Defective work piece, and have the characteristics that protection period effect is long, easily repairs, it receives significant attention.Anti-cavitation polymeric coating material master
There is two class of rigid epoxy coating and elastic polyurethane coating of high strength and high hardness.Ceramic powders (aluminium oxide, silicon carbide) increase
Strong epoxy resin type coating has many advantages, such as that adhesive strength is big, hardness is high, flushing resistance is good, but its brittleness is big, anti-cavitation
Ability is poor, is not suitable for using in the serious occasion of cavitation erosion；Elastic polyurethane coating viscoplasticity is good, can largely absorb cavitation erosion
The high-frequency percussion energy of generation, cavitation resistive property is excellent, while its mechanical strength is high, the function admirables such as wear-resisting, antiscour, is reason
The cavitation coating material thought, but such coating material is limited in the bond strength of metallic substrate surface at present, in use, in the presence of
The risk to fall off.
Patent of invention " a kind of erosion resistant coating of matrix surface cavitation and its preparation of Publication No. CN106349771A
Method ", it is prepared for a kind of erosion resistant coating of matrix surface cavitation using cubic boron nitride, epoxide-resin glue and curing agent,
The coating can be applied to that liquid is solid and the environment of biphase gas and liquid flow convection current in Anti-erosion and anti-cavitation, promoted matrix service life and
Safety.Publication No. CN 102020841A patent of invention " nano-polyurethane elastomer and preparation method thereof and with its into
The wear-resistant etching method of row " provide a kind of anti-sky that power station flow passage components, hydraulic engineering affiliated facility and mining machinery can be improved
Corrosion energy, abrasion resistance, water resistance and the nano-polyurethane elastomer for springing back extension property resist the coating with good
Energy, good abrasion resistance, excellent water resistance and good rebound, extension property, but the polyurethane vulcanization that coating uses
Agent MOCA be it is powdered, polyurethane need to be heated to 100 DEG C, workpiece is heated to 50 DEG C of constructions, and needs heat preservation solidification, operation difficulty
Larger, construction quality is difficult to ensure.
Summary of the invention
The purpose of the present invention is to provide a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength and its preparation sides
Method, the polyurethane elastomer coat room temperature construction, normal temperature cure, adhesive strength is big, the hybrid manipulation time of two components is long, rear solid
Change the advantages that speed is fast, constructing operation is simple, cohesive strength is high, elasticity is good, long service life, using in hydraulic flow passage
Part surface effectively solves the problems, such as cavitation erosion and the erosion attack of flow passage components.
The purpose of the present invention is what is be achieved through the following technical solutions:
One, a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength of the present invention, by polyurethane resin and cold cure
Two component of agent composition, by mass, polyurethane resin are 100 parts, and cold cure agent is 80~120 parts, by the proportion, will be gathered
Urethane resin is mixed evenly with cold cure agent, using modes such as brushing, roller coating and blade coatings, is applied over metal hydraulic mistake
Stream unit surface obtains the anti-cavitation polyurethane elastomer coat of high-adhesive-strength, institute on hydraulic flow passage components surface
Polyurethane resin is stated, component formula by mass is as follows:
35~45 parts of diisocyanate；
3~6 parts of polyisocyanates；
40~60 parts of dihydric alcohol；
The isocyanates is methylenebis phenyl isocyanate (MDI), toluene di-isocyanate(TDI) (TDI), isophorone two
One of isocyanates IPDI or two kinds；
The polyisocyanates is HDI trimer；
The dihydric alcohol is polytetrahydrofuran ether PTMG1000；
The cold cure agent, by mass component formula are as follows:
15~25 parts of polynary amine polymer；
55~70 parts of polyhydric alcohol polymer；
3~4 parts of deicer；
0.2~0.5 part of adhesion promoter；
0.02~0.06 part of catalyst；
1~2 part of pigments and fillers.
The polynary amine polymer is 4,4'- di-secondary fourth aminodiphenylmethane (MBDA), dimethythiotoluene diamine
(DMTDA) and one of diethyl toluene diamine (DETDA)；
The polyhydric alcohol polymer is polytetrahydrofuran ether PTMG2000；
The deicer is 600 mesh of particle size~1000 mesh lagoriolite powder；
The adhesion promoter is amino silicane coupling agent；
The catalyst is organozinc catalyst；
The pigments and fillers are conventional coloring pigment.
Two, a kind of preparation method of the anti-cavitation polyurethane elastomer coat of high-adhesive-strength of the present invention is:
(1) diisocyanate is added in reaction kettle, composition weighs dihydric alcohol by mass, under stiring, slowly adds
Enter into diisocyanate, after temperature is stablized, is heated to 75 DEG C, stirs insulation reaction 1.5 hours, after being cooled to room temperature, press
Polyisocyanates is added in quality meter composition, and polyurethane resin is made.
(2) it forms by mass, by polynary amine polymer, polyhydric alcohol polymer, deicer, adhesion promoter, catalysis
Agent, pigments and fillers are added in dispersion tank, and high-speed stirred is uniformly dispersed, and cold cure agent is made.
Three, a kind of application method of the anti-cavitation polyurethane elastomer coat of high-adhesive-strength of the present invention is:
It is matched, polyurethane resin is uniformly mixed with cold cure agent, using blade coating, brushing, roller coating and spray according to quality meter
The modes such as painting, are applied over the metal hydraulic flow passage components surface by blasting treatment, after dry solidification 24 hours, i.e., in water
The anti-cavitation polyurethane elastomer coat of power machinery flow passage components surface acquisition high-adhesive-strength.
A kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength of the present invention is pre- using diisocyanate and dihydric alcohol
Reaction is prepared into polyurethane prepolymer, and the mode that polyisocyanates is then added is prepared into polyurethane resin, and polyisocyanates exists
When reacting with cold cure agent, cross-linked structure node is provided, obtains the polyurethane elastomer of excellent in mechanical performance, to have
Excellent cavitation resistive property, while polyisocyanates has diluting effect to polyurethane resin under which, can reduce polyurethane
The viscosity of resin helps to improve resin in the wettability of substrate surface, to improve the adhesive strength of coating.And routine obtains
The method for obtaining partial cross-linking structure, is that trihydroxylic alcohol is added during preparing polyurethane prepolymer, the polyurethane of which preparation
Resin viscosity increases, and is unfavorable for construction and resin in the wetting of substrate surface, the bond strength for preparing elastomer coating is low.
The present invention uses the polynary amine polymer of high activity low molecular weight and the polyhydric alcohol polymer of low activity high molecular weight
As cold cure agent, the polynary amine polymer of high activity low molecular weight provides high intensity, and the polyalcohol of low activity high molecular weight is poly-
It closes object and high resiliency is provided, the use of low activity polyalcohol can make the cold cure agent of preparation have longer mix with polyurethane resin
Operation phase and moderate gel time make cold cure agent and polyurethane resin mixture have sufficient wetting in substrate surface
Time, to improve elastomer coating in the adhesive strength of substrate surface；Solidify the organozinc catalyst of catalytic effect after having
It is added, in the case where not reducing hybrid manipulation phase and gel time, can effectively accelerate the cured later speed of coating, make poly- ammonia
Ester elastomer at normal temperature can rapid curing.In addition, amino silicane coupling agent is added in the present invention in cold cure agent, chemistry
Active function groups amino contained in structure can be reacted with the isocyanates in polyurethane resin, formed chemical bonding, formed a film
In the process, the siloxy in coupling agent can form Hydrogenbond with the oxide skin of metallic substrate surface, to substantially enhance bullet
Adhesive strength of the property body coating in metallic substrate surface.The molecular sieve powder with water removal effect is added in cold cure agent prescription,
It can avoid the moisture content that cold cure agent absorbs to react with polyurethane resin, reduce the mechanical property of polyurethane elastomer.System of the present invention
Standby polyurethane resin and cold cure agent viscosity is smaller, and mixing working life is long, can brush, scratch, roller coating and double component solvent-free
The mode of spray gun spraying is constructed.
High-adhesive-strength of the present invention anti-cavitation polyurethane elastomer coat film forming after, with carbon steel, stainless steel and
Bond strength >=10MPa of composite material surface；Polyurethane elastomer ontology tensile strength >=35MPa, elongation at break >=
350%；Magnetostriction cavitation test 160 hours, no destruction；It can effectively realize the anti-cavitation and Anti-erosion protection of flow passage components.
Specific embodiment
The present invention is further illustrated by the following examples.
Embodiment 1:
It forms by mass, takes 35 parts of diisocyanate (MDI), be added in reaction kettle, under stiring, by dihydric alcohol
(PTMG1000) it is slowly added into reaction kettle for 40 parts, after temperature is stablized, is heated to 75 DEG C, stirs insulation reaction 1.5 hours,
It is cooled to room temperature, is added (3390) 3 parts of polyisocyanates, is mixed evenly, obtains polyurethane resin.
It forms by mass, by 15 parts of polynary amine polymer (MBDA), 55 parts of polyhydric alcohol polymer (PTMG2000), water removal
3 parts of agent (600 mesh lagoriolite), 0.2 part of adhesion promoter (KH550), 0.02 part of catalyst (organic zinc KRZN1) and pigment
1 part of (titanium dioxide) is added in dispersion tank, and high speed dispersion stirs evenly, and obtains cold cure agent.
In use, 100 parts of polyurethane resin are uniformly mixed by composition with 80 parts of cold cure agent by mass, using scraping
The modes coatings such as painting, brushing and roller coating.
After curing of coating is dry, anti-cavitation polyurethane elastomer tensile strength 36MPa, elongation at break 420%, with metal
The bond strength of substrate is up to 11.24MPa, and magnetostriction cavitation test 160 hours, no destruction；It can effectively realize flow passage components
Anti-cavitation and Anti-erosion protection.
Embodiment 2:
It forms by mass, takes 45 parts of diisocyanate (TDI), be added in reaction kettle, under stiring, by dihydric alcohol
(PTMG1000) it is slowly added into reaction kettle for 60 parts, after temperature is stablized, is heated to 75 DEG C, stirs insulation reaction 1.5 hours,
It is cooled to room temperature, is added (3390) 6 parts of polyisocyanates, is mixed evenly, obtains polyurethane resin.
It forms, by 25 parts of polynary amine polymer (DMTDA), 70 parts of polyhydric alcohol polymer (PTMG2000), removes by mass
4 parts of aqua (1000 mesh lagoriolite), 0.5 part of adhesion promoter (KH550), 0.062 part of catalyst (organic zinc KRZN1) and
2 parts of pigment (carbon black) is added in dispersion tank, and high speed dispersion stirs evenly, and obtains cold cure agent.
In use, 100 parts of polyurethane resin are uniformly mixed by composition with 120 parts of cold cure agent by mass, use
The modes coatings such as blade coating, brushing and roller coating.
After curing of coating is dry, anti-cavitation polyurethane elastomer tensile strength 42MPa, elongation at break 390%, with metal
The bond strength of substrate is up to 12.36MPa, and magnetostriction cavitation test 160 hours, no destruction；It can effectively realize flow passage components
Anti-cavitation and Anti-erosion protection.
Embodiment 3:
It forms by mass, takes 30 parts of diisocyanate (TDI), 5 parts of diisocyanate (IPDI) is added to reaction kettle
In, under stiring, dihydric alcohol (PTMG1000) is slowly added into reaction kettle for 50 parts, after temperature is stablized, is heated to 75 DEG C,
Stirring insulation reaction 1.5 hours, is cooled to room temperature, and is added (3390) 4 parts of polyisocyanates, is mixed evenly, obtains poly- ammonia
Ester resin.
It forms, by 25 parts of polynary amine polymer (DETDA), 70 parts of polyhydric alcohol polymer (PTMG2000), removes by mass
3 parts of aqua (800 mesh lagoriolite), 0.3 part of adhesion promoter (KH550), 0.04 part of catalyst (organic zinc KRZN2) and face
1 part of material (carbon black) is added in dispersion tank, and high speed dispersion stirs evenly, and obtains cold cure agent.
In use, 100 parts of polyurethane resin are uniformly mixed by composition with 120 parts of cold cure agent by mass, use
The modes coatings such as blade coating, brushing and roller coating.
After curing of coating is dry, anti-cavitation polyurethane elastomer tensile strength 38MPa, elongation at break 410%, with metal
The bond strength of substrate is up to 10.28MPa, and magnetostriction cavitation test 160 hours, no destruction；It can effectively realize flow passage components
Anti-cavitation and Anti-erosion protection.
Claims (5)
1. a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength, cavitation erosion and erosion for hydraulic flow passage components
Tamper protection, it is characterized in that:
The anti-cavitation polyurethane elastomer coat of high-adhesive-strength is made of polyurethane resin and two component of cold cure agent, by quality
Meter, polyurethane resin are 100 parts, and cold cure agent is 80~120 parts, the polyurethane resin, by mass component formula
It is as follows:
35~45 parts of diisocyanate；
3~6 parts of polyisocyanates；
40~60 parts of dihydric alcohol；
The isocyanates is methylenebis phenyl isocyanate (MDI), toluene di-isocyanate(TDI) (TDI), two isocyanide of isophorone
One of acid esters IPDI or two kinds；
The polyisocyanates is HDI trimer；
The dihydric alcohol is polytetrahydrofuran ether PTMG1000；
The cold cure agent, by mass component formula are as follows:
15~25 parts of polynary amine polymer；
55~70 parts of polyhydric alcohol polymer；
3~4 parts of deicer；
0.2~0.5 part of adhesion promoter；
0.02~0.06 part of catalyst；
1~2 part of pigments and fillers.
2. a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength according to claim 1, which is characterized in that remove
Aqua is 600 mesh of particle size~1000 mesh lagoriolite powder.
3. a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength according to claim 1, which is characterized in that urge
Agent is organozinc catalyst.
4. a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength according to claim 1, which is characterized in that attached
Adhesion promoter is amino silicane coupling agent.
5. a kind of anti-cavitation polyurethane elastomer coat of high-adhesive-strength according to claim 1, which is characterized in that system
It is standby that steps are as follows:
(1) diisocyanate is added in reaction kettle, by mass composition weigh dihydric alcohol, under stiring, be slowly added to
In diisocyanate, after temperature is stablized, 75 DEG C are heated to, is stirred insulation reaction 1.5 hours, after being cooled to room temperature, by quality
Polyisocyanates is added in meter composition, and polyurethane resin is made；
(2) it forms by mass, by polynary amine polymer, polyhydric alcohol polymer, deicer, adhesion promoter, catalyst, face
Filler is added in dispersion tank, and high-speed stirred is uniformly dispersed, and cold cure agent is made.
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| CN109735223A (en) * | 2018-12-29 | 2019-05-10 | 北京东方雨虹防水技术股份有限公司 | A kind of modified double components polyurethane water-proof paint and preparation method thereof |
| CN110183610A (en) * | 2019-05-21 | 2019-08-30 | 哈尔滨工程大学 | A kind of anti-cavitation corrosion elastic polyurethane layer and preparation method thereof |
| CN111748272A (en) * | 2020-07-08 | 2020-10-09 | 黄海千 | Preparation method of high cavitation erosion resistance coating |
| CN114672239B (en) * | 2022-04-01 | 2022-11-18 | 吉林大学 | Cavitation-corrosion-resistant and corrosion-resistant multifunctional paint and coating |
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| CN102020841A (en) * | 2010-11-10 | 2011-04-20 | 黄河水利委员会黄河水利科学研究院 | Nano-polyurethane (PU) elastomer, preparation method of PU elastomer and abrasion resisting method using PU elastomer |
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