CN103820017B - Epoxy modified polyurethane primer and preparation method thereof - Google Patents
Epoxy modified polyurethane primer and preparation method thereof Download PDFInfo
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- CN103820017B CN103820017B CN201410071904.3A CN201410071904A CN103820017B CN 103820017 B CN103820017 B CN 103820017B CN 201410071904 A CN201410071904 A CN 201410071904A CN 103820017 B CN103820017 B CN 103820017B
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- modified polyurethane
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- primary coat
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Abstract
The invention discloses an epoxy modified polyurethane primer. The epoxy modified polyurethane primer is bi-component coating comprising an A component and a B component. The A component comprises 20-45 parts by weight of polyisocyanate, prepolymer obtained by reacting 20-40 parts by weight of polyol with 5-15 parts by weight of epoxy resin, and 10-40 parts by weight of a solvent. The B component comprises 5-15 parts by weight of an amino curing agent, 5-30 parts by weight of a hydroxy curing agent and 50-85 parts by weight of a solvent. The epoxy modified polyurethane primer can be used for concrete surfaces and used in an environment with relatively large humidity and relatively low temperature, and has advantages of good pore blocking effects, high construction efficiency, high adhesive force, and the like.
Description
Technical field
The present invention relates to a kind of epoxy modified polyurethane primary coat, belongs to building material field.
Background technology
Polyureas must use special primary coat in concrete surface, and primary coat one is for closed concrete substrate surface capillary
Air and moisture in hole, it is to avoid bulge and pin-hole phenomena occur after polyurea coating spraying；Two can be the work for playing adhesive
With, the adhesion strength of polyurea coating and concrete substrate is improved, improve protection effect.
Primary coat in the market mainly has following several systems：
1st, polyurethane primary coat.Polyurethane primary coat is generally divided into double-component and one-component, monocomponent polyurethane primary coat user
But bin is shorter just,.Compared with dual-component polyurethane primary coat, easily there is in use foaming in monocomponent polyurethane primary coat
Phenomenon, its adhesion strength of dual-component polyurethane primary coat is relatively low, it is difficult to meet requirement of engineering.
2nd, epoxy resin primary coat.Epoxy resin primary coat is generally double-component, and component A is epoxy resin and epoxide resin reactive
Diluent and solvent are constituted, and B component is amino-epoxy firming agent.Although epoxy resin primary coat is with respect to polyurethane primary coat adhesion strength
It is good, affected little by ambient humidity, but its temperature influence, than larger, response speed is reduced quickly, below 5 DEG C below 15 DEG C
Almost it is difficult to solidify.
The content of the invention
For the defect of prior art, the present invention provides a kind of epoxy modified polyurethane primary coat, and the primary coat can be relatively wet
Degree use for concrete surface than brushing under relatively low environment than larger, temperature, with plug-hole effect it is good, efficiency of construction is high,
Adhesive force is strong, it is applied widely the advantages of.
For achieving the above object, the present invention is achieved through the following technical solutions：
A kind of epoxy modified polyurethane primary coat, is the two-component coating being made up of component A and B component, wherein component A be by
Performed polymer and solvent composition that the reaction of polyisocyanates, PEPA and epoxy resin is obtained；B component by amino curing agent,
Hydroxyl cure agent, solvent and auxiliary agent composition, wherein each component parts by weight are as follows：
Component A：
B component：
Amino curing agent 5～15
Hydroxyl cure agent 5～30
Solvent 50～85.
Accordingly, on the basis of the above, the invention discloses the epoxy modified polyurethane bottom for concrete surface
The preparation method of painting：
The preparation method of component A：PEPA is added in the reactor for having nitrogen to protect, is heated under agitation
100～120 DEG C, constant temperature is evacuated to more than pressure -0.095MPa in kettle and is dehydrated 3 hours, closes vacuum cool-down and adds to 50～60 DEG C
Enter the polyisocyanates of respective amount, be heated to 70～90 DEG C and react 3 hours, add epoxy resin to continue to react 1 hour, be cooled to
40～60 DEG C, stirring solvent is added uniformly to discharge afterwards and obtain；
The preparation method of B component：First solvent is added in reactor, lower addition amino curing agent and hydroxyl is then stirred
Under firming agent low rate mixing to be solidified dose be completely dissolved after, add the discharging of other auxiliary agent mix homogeneously and obtain.
Method made above is only the present invention preferably preparation method, and not limiting the present invention can only adopt said method
Make, those skilled in the art are changed and can't change to heating-up temperature, vacuum, response time etc. on the basis of the above
The essence of the present invention, simply affects accordingly the preparation speed and yield of product, and this change is to be covered by present invention protection model
Within enclosing.
Further, the invention also discloses the user of the epoxy modified polyurethane primary coat for concrete surface
Two components are carried out mixing and stirring by method according to weight ratio for 2: 1～4: 1 ratio, using brushing or roller applications construction.
Being described in further detail and being embodied as in the present invention, the invention discloses the preferred type of various composition used,
The present invention is explained so as to more preferable, clearer, but this detailed description does not constitute the special restriction to the present invention, not against
These details and adopt technical field other general chemical materials, as long as it meets, the present invention is above-mentioned to be constituted into each
The restriction that point title is done, still belongs to protection scope of the present invention.
In the present invention, the polyisocyanates be selected from toluene di-isocyanate(TDI), methyl diphenylene diisocyanate, repeatedly
The aromatic polyisocyanates such as methyl polyphenyl polyisocyanate；Or selected from cyclohexane diisocyanate, the isocyanide of hexa-methylene two
The aliphatic polyisocyantes such as acid esters, isophorone diisocyanate；Or aromatic polyisocyanate and aliphatic polyisocyanic acid
The mixture of ester.
Preferably, the polyisocyanates is methyl diphenylene diisocyanate and/or many isocyanides of many phenyl of polymethine
Acid esters.
In the present invention, the polyhydric alcohol is selected from polyether polyol, PEPA, polytetrahydrofuran polyol
Plant and/or more than one mixture, its degree of functionality is 2～4, hydroxyl value equivalent is 500～2000.
The polyhydric alcohol is preferably PEPA, and its degree of functionality is 2～3, and hydroxyl value equivalent is 1000.
In the present invention, the epoxy resin is selected from bisphenol A type epoxy resin and/or bisphenol f type epoxy resin, its epoxy
Value is not less than 0.12.
The epoxy resin is preferably bisphenol A type epoxy resin, and its epoxide number is 0.20～0.56.
In the present invention, the amino curing agent is selected from 3,3 '-two chloro- 4,4 '-diaminodiphenyl-methane (MOCA), two
Ethyltoluene diamidogen, dimethythiotoluene diamine, N, N '-dialkyl methyl diphenylamines, 4, in 4 '-diaminodiphenyl-methane
A kind of and/or more than one mixture, its degree of functionality is 2～4.
The amino curing agent is preferably 3,3 '-two chloro- 4,4 '-diaminodiphenyl-methane (MOCA).
In the present invention, the hydroxyl cure agent is selected from BDO, glycerol, trimethylolpropane, triethanolamine, season
One kind and/or more than one mixture in penta tetrol, its degree of functionality is 2～4.
The hydroxyl cure agent is preferably trimethylolpropane (TMP).
In the present invention, the one kind and/or one kind of the solvent in ethyl acetate, butyl acetate, acetone, dimethylbenzene
Mixture above.
The solvent is preferably the mixture of butyl acetate and acetone.
Further, in the coating of the present invention, the B component may also include auxiliary agent to improve the multiple performance of coating,
For example：In B component, the auxiliary agents such as defoamer, antioxidant, UV absorbers, flow improving agent can be added as needed.
Wherein, the parts by weight of auxiliary agent, for other compositions, not higher than 5, i.e., 0～5.It should be noted that this
The consumption of place's description auxiliary agent has used numerical expression scope as 0-x, is for expressing the consumption of such components by the upper limit
Restriction, as long as playing corresponding function by adding this component in composition, under normal conditions using auxiliary agent in order to improve
Particular characteristic in terms of certain, but according to the needs for using, do not use auxiliary agent to be also feasible.
The epoxy modified polyurethane primary coat of the present invention is applied to concrete surface process, the predominantly concrete of spray polyurea
The process of basal plane, with wide applicability, is applicable to extensive humidity and temperature range.
Specific embodiment
The spirit of the present invention can be better understood from conjunction with specific embodiments, in following enforcement, there is provided this
Invention is some preferred embodiment to be constituted with material, but the present invention is not limited in implementing using following manner, this area
Change, replacement, improvement that technical staff is carried out on the basis of essence of the present invention is understood to the present invention etc. still belongs to this
Bright protection domain.
In the following embodiments, each raw material can be from market purchasing, such as：
PM-200 polyisocyanates (Yantai Wanhua Polyurethane Co., Ltd.)
M20S polyisocyanates (BASF Aktiengesellschaft)
PS-2000 PEPAs (imported from America)
MOCA amino curing agents (Hunan garden chemical industry)
E-44, E-51 bisphenol A type epoxy resin (Shanghai Resin Factory's manufacture)
Embodiment 1
40 weight of polyester dihydroxylic alcohols PS-2000 and 5 parts by weight epoxy resin E-44 are added in the reactor of nitrogen charging, plus
To (105～115) DEG C, constant temperature is evacuated in kettle more than pressure -0.095MPa and is dehydrated 3 hours temperature, close vacuum cool-down to (50～
DEG C 60) add 20 weight portion PM-200, be heated to (70～90) DEG C reaction 3 hours, be cooled to (50～60) DEG C, add 35 weight
Part acetone, discharging after stirring is component A.B component be by 5 weight portion MOCA, 5 weight portion TMP, 40 pbw acetones,
The attachment of 45 weight portion butyl acetates, 1 weight portion defoamer, 1 weight portion levelling agent, the catalyst of 1 weight portion and 2 weight portions is made every effort to promote
Enter agent and be uniformly mixed in a kettle. to make.When using, A: B=2: 1 (mass ratio) mixing and stirring.
Embodiment 2
30 weight of polyester dihydroxylic alcohols PS-2000 and 10 parts by weight epoxy resin E-44 are added in the reactor of nitrogen charging,
It is heated up to (105～115) DEG C, constant temperature is evacuated to more than pressure -0.095MPa in kettle and is dehydrated 3 hours, closes vacuum cool-down to (50
60) DEG C～add 30 weight portion PM-200, be heated to (70～90) DEG C reaction 3 hours, it is cooled to (50～60) DEG C, add 30 weights
Amount part acetone, discharging after stirring is component A.B component is by 10 weight portion MOCA, 10 weight portion TMP, 40 weight portions third
The attachment of ketone, 35 weight portion butyl acetates, 1 weight portion defoamer, 1 weight portion levelling agent, the catalyst of 1 weight portion and 2 weight portions
Power accelerator is uniformly mixed in a kettle. makes.When using, A: B=2: 1 (mass ratio) mixing and stirring.
Embodiment 3
20 weight of polyester dihydroxylic alcohols PS-2000 and 15 parts by weight epoxy resin E-44 are added in the reactor of nitrogen charging,
It is heated up to (105～115) DEG C, constant temperature is evacuated to more than pressure -0.095MPa in kettle and is dehydrated 3 hours, closes vacuum cool-down to (50
60) DEG C～add 45 weight portion PM-200, be heated to (70～90) DEG C reaction 3 hours, it is cooled to (50～60) DEG C, add 15 weights
Amount part acetone, discharging after stirring is component A.B component is by 12 weight portion MOCA, 20 weight portion TMP, 25 weight portions third
The attachment of ketone, 35 weight portion butyl acetates, 1 weight portion defoamer, 1 weight portion levelling agent, the catalyst of 1 weight portion and 2 weight portions
Power accelerator is uniformly mixed in a kettle. makes.When using, A: B=2: 1 (mass ratio) mixing and stirring.
The performance test results of above example are shown in Table
The performance test results of the embodiment of table 1 (room temperature)
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Surface drying time/h | 1.5 | 1.0 | 0.5 |
| Do solid work the time/h | 4 | 3.5 | 3 |
| Adhesion strength/MPa | 3.8 | 4.4 | 4.9 |
| Peel strength N/mm | 7.9 | 9.5 | 10.8 |
By above-mentioned experimental data can be seen that the present invention coating by under described composition properties it is good,
Meet application demand.
By the product of above-described embodiment be used for low temperature under concrete surface process, carried out respectively temperature for 12 DEG C,
Humidity 60%, temperature is 3 DEG C, the checking in the case of humidity 75%, as a result as shown in table 2 below, 3：
The performance test results of the embodiment of table 2
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Surface drying time/h | 1.5 | 1.1 | 0.6 |
| Do solid work the time/h | 4.1 | 3.8 | 3.2 |
| Adhesion strength/MPa | 3.5 | 4.0 | 4.7 |
| Peel strength N/mm | 7.5 | 9.5 | 10.5 |
The performance test results of the embodiment of table 3
| Project | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Surface drying time/h | 1.7 | 1.4 | 0.7 |
| Do solid work the time/h | 4.2 | 3.9 | 3.5 |
| Adhesion strength/MPa | 3.5 | 4.0 | 4.5 |
| Peel strength N/mm | 7.5 | 9.2 | 10.2 |
Although it is seen from the above data that the performance of coating of the present invention occurred in that and slightly reduce under low temperature, high humility,
But still meet construction demand.
There is rapid drawdown in conventional epoxy resin primary coat performance in the range of 10-15 DEG C, in 5 DEG C and temperature below substantially without applying
Work feasibility, the epoxy modified polyurethane primary coat of the present invention then overcomes this problem.
Claims (7)
1. a kind of epoxy modified polyurethane primary coat, it is characterised in that two-component coating, the component A are made up of component A and B component
Performed polymer and solvent are constituted obtained by polyisocyanates, polyhydric alcohol and epoxy resin react；The B component solidifies including amino
Agent, hydroxyl cure agent, solvent, wherein each component parts by weight are as follows：
Component A：
B component：
Amino curing agent 5～15
Hydroxyl cure agent 5～30
Solvent 50～85；
Wherein, the polyisocyanates is aromatic polyisocyanate and/or aliphatic polyisocyante；The polyhydric alcohol is selected from
One or more mixture of polyether polyol, PEPA, its degree of functionality be 2～4, hydroxyl value equivalent be 500～
2000；The epoxy resin is bisphenol A type epoxy resin and/or bisphenol f type epoxy resin, and its epoxide number is not less than 0.12；Institute
State amino curing agent and be selected from 3,3 '-two chloro- 4,4 '-diaminodiphenyl-methane (MOCA), diethyl toluene diamine, dimethyl sulphur-based
Toluenediamine, N, N '-dialkyl methyl diphenylamines, 4, one or more the mixing in 4 '-diaminodiphenyl-methane
Thing, its degree of functionality is 2～4；The hydroxyl cure agent is selected from BDO, glycerol, trimethylolpropane, triethanolamine, season
One or more mixture in penta tetrol, its degree of functionality is 2～4.
2. epoxy modified polyurethane primary coat according to claim 1, it is characterised in that the polyhydric alcohol is PolyTHF
Polyhydric alcohol.
3. epoxy modified polyurethane primary coat according to claim 1, it is characterised in that the polyisocyanates is diphenyl
Methane diisocyanate and/or polymethine polyphenyl polyisocyanate.
4. epoxy modified polyurethane primary coat according to claim 1, it is characterised in that the epoxy resin is bisphenol A-type ring
Oxygen tree fat, its epoxide number is 0.20～0.56.
5. epoxy modified polyurethane primary coat according to claim 1, it is characterised in that the solvent is selected from ethyl acetate, second
One or more mixture in acid butyl ester, acetone, dimethylbenzene.
6. epoxy modified polyurethane primary coat according to claim 1, it is characterised in that the B component also includes auxiliary agent, helps
The parts by weight of agent are not higher than 5.
7. the preparation method of the epoxy modified polyurethane primary coat described in any one of claim 1-6, it is characterised in that：
The preparation method of component A：Polyhydric alcohol is added in the reactor for having nitrogen to protect, 100～120 are heated under agitation
DEG C, constant temperature is evacuated to more than pressure -0.095MPa in kettle and is dehydrated 3 hours, closes vacuum cool-down to 50～60 DEG C of addition respective amounts
Polyisocyanates, be heated to 70～90 DEG C react 3 hours, add epoxy resin continue react 1 hour, be cooled to 40～60
DEG C, add stirring solvent uniformly to discharge afterwards and obtain；
The preparation method of B component：First solvent is added in reactor, lower addition amino curing agent and hydroxyl cure is then stirred
Under agent low rate mixing to be solidified dose be completely dissolved after, add the discharging of other auxiliary agent mix homogeneously and obtain.
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| CN105153389A (en) * | 2015-10-23 | 2015-12-16 | 蓝星（成都）新材料有限公司 | Polyurethane-epoxy resin material and preparation method thereof |
| CN106700887B (en) * | 2016-12-28 | 2019-05-28 | 北京金盾建材有限公司 | A kind of basecoat of low-temperature setting concrete foundation processing |
| CN106928809B (en) * | 2017-03-21 | 2020-01-03 | 新疆科能防水防护技术股份有限公司 | Epoxy resin coating and preparation method thereof |
| CN107760191A (en) * | 2017-09-29 | 2018-03-06 | 东来涂料技术（上海）有限公司 | A kind of waterborne conductive priming paint applied to automobile carbon fiber and preparation method thereof |
| CN108841308B (en) * | 2018-06-22 | 2021-02-19 | 中国石油天然气集团公司管材研究所 | Curing agent and preparation method thereof, and anticorrosive paint and preparation method thereof |
| CN111269647A (en) * | 2020-03-24 | 2020-06-12 | 宜兴市华夏化工材料有限公司 | Preparation method and application of epoxy resin modified polyurethane coating agent |
| CN112980377A (en) * | 2021-01-29 | 2021-06-18 | 佛山市高明大都化工有限公司 | Oil skin nylon treating agent and preparation method thereof |
| CN114989709B (en) * | 2022-06-17 | 2023-10-24 | 中车株洲车辆有限公司 | Water-based precoating primer, coating and product with coating |
| CN115926605B (en) * | 2022-11-25 | 2023-10-13 | 四川昕悦环保科技有限公司 | Spray film material, preparation method and application thereof |
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| CN1280364C (en) * | 2004-11-01 | 2006-10-18 | 中国化工建设总公司常州涂料化工研究院 | Polyamide primer for precoating coiled material |
| DE102006015774A1 (en) * | 2006-04-04 | 2007-10-11 | Construction Research & Technology Gmbh | Two-component (aqueous) hybrid reactive resin system, process for its preparation and its use |
| CN102079940A (en) * | 2010-12-08 | 2011-06-01 | 上海瑞鹏化工材料科技有限公司 | Preparation method and application technique of hard pure-polyurea coating material sprayed in pipelines |
| CN102675584B (en) * | 2011-03-08 | 2014-01-29 | 北京市大禹王防水工程集团有限公司 | Polyurethane base coat special for spraying polyurea on concrete base face and preparation method and application of polyurethane base coat |
| CN102993929B (en) * | 2012-09-29 | 2015-09-02 | 北京东方雨虹防水技术股份有限公司 | A kind of epoxide modified spray polyurea protective system for steel structure surface and preparation and application thereof |
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