CN115710828A - Polyaspartic acid ester coating for skin and preparation method and application thereof - Google Patents
Polyaspartic acid ester coating for skin and preparation method and application thereof Download PDFInfo
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- CN115710828A CN115710828A CN202211481693.1A CN202211481693A CN115710828A CN 115710828 A CN115710828 A CN 115710828A CN 202211481693 A CN202211481693 A CN 202211481693A CN 115710828 A CN115710828 A CN 115710828A
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- 239000011248 coating agent Substances 0.000 title claims abstract description 45
- 150000002148 esters Chemical class 0.000 title claims abstract description 35
- 108010064470 polyaspartate Proteins 0.000 title claims abstract description 30
- 229920000805 Polyaspartic acid Polymers 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 58
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- 239000011347 resin Substances 0.000 claims abstract description 28
- 229920000608 Polyaspartic Polymers 0.000 claims abstract description 13
- 229920000728 polyester Polymers 0.000 claims abstract description 11
- 239000005058 Isophorone diisocyanate Substances 0.000 claims abstract description 8
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
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- 238000003756 stirring Methods 0.000 claims description 34
- 239000000843 powder Substances 0.000 claims description 8
- 239000000049 pigment Substances 0.000 claims description 5
- FYGHSUNMUKGBRK-UHFFFAOYSA-N 1,2,3-trimethylbenzene Chemical compound CC1=CC=CC(C)=C1C FYGHSUNMUKGBRK-UHFFFAOYSA-N 0.000 claims description 4
- YXRKNIZYMIXSAD-UHFFFAOYSA-N 1,6-diisocyanatohexane Chemical compound O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O YXRKNIZYMIXSAD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002518 antifoaming agent Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- 239000008096 xylene Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 13
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- 239000002994 raw material Substances 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000012948 isocyanate Substances 0.000 description 6
- 150000002513 isocyanates Chemical class 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 239000004721 Polyphenylene oxide Substances 0.000 description 4
- 238000004132 cross linking Methods 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229920000570 polyether Polymers 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 239000005057 Hexamethylene diisocyanate Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 229920002396 Polyurea Polymers 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
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- 239000000758 substrate Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000003513 alkali Substances 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000010985 leather Substances 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 125000000467 secondary amino group Chemical class [H]N([*:1])[*:2] 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000122205 Chamaeleonidae Species 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000002318 adhesion promoter Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- XLJMAIOERFSOGZ-UHFFFAOYSA-N anhydrous cyanic acid Natural products OC#N XLJMAIOERFSOGZ-UHFFFAOYSA-N 0.000 description 1
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- 230000008033 biological extinction Effects 0.000 description 1
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- 239000007789 gas Substances 0.000 description 1
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000004611 light stabiliser Substances 0.000 description 1
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- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
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- 230000003068 static effect Effects 0.000 description 1
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- 229920002994 synthetic fiber Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
Abstract
The invention belongs to the field of coatings, and particularly relates to a polyaspartic ester coating for skins, which comprises a component A and a component B, and is characterized in that the mass ratio of the component A to the component B is 1-3; the component A comprises 12 to 25 parts of polyaspartic ester resin and 50 to 60 parts of solvent by weight; the component B comprises an HDI tripolymer curing agent and an IPDI modified polyester curing agent; the mass ratio of the HDI tripolymer curing agent to the IPDI modified polyester curing agent is 1; the structure of the polyaspartic acid ester resin is as follows:
wherein R1 is-CH 2 (CH 2 )nCH(CH 3 )(CH 2 )mCH 2 -, n and m are independently an integer of 0 to 7. The coating provided by the invention can be directly sprayed and constructed, is good in matching compatibility with oxford skin, and has no fracture damage after being folded and no fracture damage after being kneaded for 30 ten thousand times.
Description
Technical Field
The invention belongs to the field of coatings, and particularly relates to a polyaspartic acid ester coating for skins, and a preparation method and application thereof.
Background
The camouflage is divided into two parts of 'hidden true' and 'false-showing', the hidden true technology faces more and more challenges with the development of modern science and technology, and the false-showing technology plays more and more roles in the battlefield at present through the combination of true, false, virtual, real and true.
After the equipment is worn with the skin coated with the camouflage color, the appearance of the equipment is more puzzled, the identification degree is obviously reduced, and the equipment can be hidden in the surrounding environment like a chameleon. The skin coated with the camouflage pattern mostly takes oxford as a base material, the camouflage pattern is coated on the surface of the skin by machine printing ink, and then the skin is cut, spliced and sewn according to the shape of the simulated false target and the surface camouflage pattern. The technology of firstly printing ink and then cutting and sewing has the problems of complex process, unsatisfactory splicing and sewing effect, large consumption of manpower, material resources and financial resources and the like. And the machine-applied ink is a thermoplastic resin coating, no curing agent crosslinking reaction exists in the curing process, the performance of the coating is poor compared with that of thermosetting resin, the performance of the coating is greatly influenced by the environment, the temperature is high, the paint film is soft and low, and the paint film is hard. More importantly, the treated skin is easy to damage after being folded in half and has poor rubbing resistance.
The prior art CN 103485181B discloses that a coating obtained by 3-6 parts of polyethylene glycol, 0.7-2 parts of ethyl acrylate, 4-7 parts of polyvinyl acetate and 1-3 parts of toluene diisocyante is added into a reaction kettle, 10-15 parts of acetone is added as a solvent, the mixture is stirred and heated to 56-60 ℃ to evaporate acetone, 70-120 parts of water and 0.9 part of cross-linking agent are added, and the mixture is sprayed on the surface of oxford cloth. However, the technology of the invention needs to be dried for 1 to 1.5 hours at a temperature of between 120 and 180 ℃, which is not beneficial to the production. Toluene diisocyanyl ester is added, then water is added, and the existence of water proves that the reaction is not the reaction of isocyanic acid radical and amino active hydrogen, and the structure is unstable.
The prior art CN105670475A discloses a solvent-free polyaspartic ester polyurea coating, a preparation method and an application thereof, wherein the solvent-free polyaspartic ester polyurea coating comprises a component A and a component B, wherein the component A comprises the following components in percentage by weight: 60-80% of hexamethylene diisocyanate and 20-40% of urethane-based modified HDI tripolymer; the component B comprises the following components in percentage by weight: 60-70% of polyaspartic acid ester, 5-10% of pigment and filler, 10-20% of modified silicon micropowder, 1-3% of defoaming agent, 1-3% of flatting agent, 2-5% of adhesion promoter and 1-3% of coupling agent; the mass ratio of the component A to the component B is 3-5. By adopting the technical scheme, the low-temperature curability of the product is greatly improved; and the adhesive strength of the polyethylene with non-polar materials is enhanced, and the polyethylene has flexibility, high mechanical strength and chemical corrosion resistance.
The prior art CN 110760253A discloses a poly aspartic acid resin coating for a luggage compartment, a preparation method and an application thereof, and the poly aspartic acid resin coating is composed of a main agent and a curing agent, wherein the weight part of the main agent and the curing agent is 100: 25-100: 42. Wherein the main agent is prepared by adding corresponding materials such as flame retardant, dispersant, dust-proof agent, defoaming agent, pigment, filler, light absorbent, light stabilizer, catalyst, wear-resistant powder, flatting agent, solvent and the like into polyaspartic acid ester resin; the curing agent is prepared by adding materials such as a water absorbent, a solvent and the like into polyisocyanate, and the prepared main agent and the curing agent are matched to obtain the polyaspartic acid resin coating for the luggage compartment. The polyaspartic acid resin coating for the luggage compartment can be dried under the condition of self-drying or low-temperature baking after being coated, and the thickness of a once-coated paint film is 30-80 mu m. The poly-aspartic acid resin coating for the luggage compartment has the characteristics of thin coating, long-acting protection, excellent medium resistance, high solid content, wear resistance, flame retardance, excellent decoration and the like.
However, the two polyaspartic acid ester coatings can only be respectively coated on non-polar materials such as polyethylene, aluminum alloy and the like, cannot be matched with the skin of the oxford fabric substrate for use, and cannot meet the requirements of no damage to the skin due to folding in half and rubbing resistance.
In the prior art, CN 108559391A provides a polyaspartic ester finish paint and a preparation method thereof, wherein glass flakes are subjected to grafting modification to enhance the interfacial adhesion between the glass flakes and resin and simultaneously improve the problem that the glass flakes are easy to agglomerate. The modified glass flakes are added into resin, so that the bonding force between the glass flakes and the resin can be improved, a solid integral film is formed on a cured film layer, and the polyaspartic acid ester finish paint with good weather resistance, excellent mechanical properties, acid and alkali resistance, aging resistance, corrosion resistance and good construction performance is prepared. The finish paint is used as a surface protection finish paint for metal, concrete, polyurea coatings and other synthetic materials. However, the elastic isocyanate curing agent disclosed by the invention is a polyether type isocyanate prepolymer, is used on a common metal base material, is added with glass flakes, and has poor matching performance with oxford skin, folding fracture and poor weather resistance.
Disclosure of Invention
The invention aims to provide a sprayable polyaspartic ester coating for skin, which meets the performance requirements of no damage to folding of the skin coating and rubbing resistance.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a polyaspartic acid ester coating for skin comprises two components A and B, wherein the mass ratio of the component A to the component B is 1-3; the component A comprises 12 to 25 parts of polyaspartic ester resin and 50 to 60 parts of solvent by weight; the component B comprises an HDI trimer curing agent and an IPDI modified polyester curing agent; the mass ratio of the HDI tripolymer curing agent to the IPDI modified polyester curing agent is 1;
the structure of the polyaspartic acid ester resin is as follows:
In the present invention, since R1 is-CH 3 The steric hindrance and the polarity of the polyaspartic ester resin are dual functions, the activity of active hydrogen on amino in the polyaspartic ester resin is inhibited, the reaction activity is reduced, the pot life is longer,the coating is favorable for coating spraying construction, does not contain a benzene ring rigid structure in a molecular structure, and has good weather resistance, excellent elasticity and good matching performance with the Oxford cloth coating.
Meanwhile, if the proportion of the component B is too large, the excessive isocyanate curing agent is easy to react with water in the air to release carbon dioxide gas and the like, so that the paint film defects are caused, and if the proportion of the component B is too small, the complete curing cannot be realized, and the strength is not feasible.
Preferably, in the R1, n is 1 or 2, m is 3 or 4.
In the polyaspartic acid ester resin, the carbon chain is moderate with 8-10, the carbon chain is too long, the elasticity is good, but the crosslinking density is too low, and the strength is poor; the carbon chain is too short, the crosslinking density is higher, but the paint film is brittle and has poor elasticity.
Preferably, the HDI trimer curing agent is Bayer N3390 curing agent, and the IPDI modified polyester curing agent is GB926-85 curing agent.
The GB926-85 curing agent used alone has poor drying property, poor film forming property and stickiness, and other curing agents are required to be added for compounding and curing because the curing agent used alone has low crosslinking density.
And the applicant proves through a large number of experiments that the Bayer N3390 curing agent has better elastic and mechanical properties, but the Bayer N3390 curing agent and the GB926-85 curing agent are compounded to have complementary properties. However, the GB926-85 curing agent is compounded with other curing agents, and the folding and rubbing resistance performance of the curing agent is deviated.
Preferably, the component A also comprises 5-9 parts of matting powder, 0.5-2 parts of defoaming agent and 5-25 parts of pigment.
The resin has high gloss, and the gloss must be reduced to below 3 in order to reduce the use amount of the gloss extinction powder. The addition of the matting powder can affect the strength of a paint film, and the addition of the pigment can also affect the strength of the paint film, but the addition of the matting powder is too small, so that the covering power of the paint is not good. Therefore, the fixed resin and the curing agent must be matched to meet the performance requirement of the skin.
Preferably, the solvent is one or more of xylene, trimethylbenzene and butyl acetate.
The invention also claims a preparation method of the polyaspartic ester coating for the skin, which comprises the following steps:
sequentially adding the components A according to the weight percentage under the stirring state, uniformly stirring and grinding for later use;
mixing the components in the component B according to the weight parts for later use; mixing the components A and B at a certain ratio before use.
The invention also claims application of the polyaspartic ester coating for the skin in preparing camouflage equipment.
The invention is further explained below:
the polyaspartic acid ester resin has moderate active hydrogen reaction activity on secondary amine in the resin, can realize spraying construction, and selects the modified polyester type isocyanate curing agent, so that the modified polyester type isocyanate curing agent has good elasticity and excellent weather resistance. But the modified polyester type isocyanate elastic curing agent is singly used, so that the phenomena of slow curing and incomplete curing of a paint film exist, the soft elastic strength of the paint film is low, and the compounded N3390 curing agent has high elasticity and high strength. Because the 60-degree gloss of the camouflage paint is required to be less than or equal to 3, the gloss of the polyaspartic acid ester paint is high, the amount of matting powder is large, and the amount of matting powder is required to be 5-9% of the mass of the paint, excessive cracking and breaking of a coating can be caused, a high-elasticity high-strength resin system is adopted, the formula is optimized, the combination of the strength and the low gloss of the coating is realized, the camouflage paint is finally applied to the oxford leather, the coating cannot be broken and damaged when folded, and the rubbing resistance cannot be damaged for 30 ten thousand times.
Compared with the products on the market, the coating provided by the invention can be applied to the soft oxford leather, and is different from the polyaspartic acid ester coating on the market which is generally used on a hard metal substrate or a glass fiber reinforced plastic substrate. The camouflage paint for the oxford skin cloth can be directly sprayed and constructed on the premise that the technology meets the requirements of camouflage paint, and has good compatibility with the oxford skin, no fracture damage when folded, and no fracture damage when kneaded for 30 ten thousand times.
Detailed Description
The technical solution of the present invention is further described with reference to the following specific embodiments. In the following implementation, the acid and alkali resistant environment-friendly static conductive coating prepared by the invention is applied to coating of closed structures.
The specific information of each component of the examples is shown in table 1.
TABLE 1 information on the components of the examples
Example 1
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at the stirring speed of 800r/min, adds the raw materials while stirring, and grinds to the fineness of less than or equal to 20 mu m after stirring for 20min at the speed of 800 r/min.
B, preparation of a component: m (GB 926-85) m (N3390) =4, and the mixture is stirred uniformly. m (A): m (B) = 1.
Example 2
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at the stirring speed of 800r/min, adds the raw materials while stirring, and grinds to the fineness of less than or equal to 20 mu m after stirring for 20min at the speed of 800 r/min.
B, preparation of a component: m (GB 926-85), m (N3390) =6, and the mixture is stirred uniformly. m (A): m (B) = 1.
Example 3
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at the stirring speed of 800r/min, adds the raw materials while stirring, and grinds to the fineness of less than or equal to 20 mu m after stirring for 20min at the speed of 800 r/min.
B, preparation of a component: m (GB 926-85), m (N3390) =5, and the mixture is stirred uniformly. m (A): m (B) = 3.
The specific information for each component of the comparative example is shown in table 2.
TABLE 2 information on the respective proportional components
Comparative example 1
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at 800r/min, adds raw materials while stirring, and grinds to fineness less than or equal to 20 μm after stirring for 20min at 800 r/min.
B, preparation of a component: m (GB 926-85) m (N3390) =4, and the mixture is stirred uniformly. m (A): m (B) = 1.
Comparative example 2
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at the stirring speed of 800r/min, adds the raw materials while stirring, and grinds to the fineness of less than or equal to 20 mu m after stirring for 20min at the speed of 800 r/min.
B, preparation of a component: m (GB 926-85) m (N3800) =4, and the components are uniformly stirred to obtain the compound. m (A): m (B) = 2.
Comparative example 3
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at the stirring speed of 800r/min, adds the raw materials while stirring, and grinds to the fineness of less than or equal to 20 mu m after stirring for 20min at the speed of 800 r/min.
B, preparation of a component: m (GB 926-85) m (N3900) =4, and the components are uniformly stirred. m (A): m (B) = 1.
Comparative example 4
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at 800r/min, adds raw materials while stirring, and grinds to fineness less than or equal to 20 μm after stirring for 20min at 800 r/min.
B, preparation of a component: m (GB 926-85) m (HT 100) =4, and the mixture is stirred uniformly. m (A): m (B) = 2.
Comparative example 5
The component A is prepared according to the weight of the following table 1: the stirring disperser uniformly disperses at the stirring speed of 800r/min, adds the raw materials while stirring, and grinds to the fineness of less than or equal to 20 mu m after stirring for 20min at the speed of 800 r/min.
B, preparation of a component: m (GB 805B-100) = m (HT 100) =4, and the mixture is stirred uniformly. m (A): m (B) = 1.
And (3) performance testing:
the polyaspartic acid ester coating prepared in each example and comparative example was sprayed on oxford skin cloth, and the performance was tested after curing at room temperature for 24 hours. The results obtained are shown in tables 3 and 4.
TABLE 3 test results for the examples
Table 4 comparative test results
As can be seen from Table 3, the polyaspartic acid ester coating camouflage protective coating for skins, which is prepared in the embodiments 1-3 of the invention, can meet the technical requirements of camouflage coating specifications through formula optimization, color difference and 60-degree gloss, and can be matched with Oxford fabric skins, so that the coating is good in compatibility, free of damage after being folded, resistant to rubbing for 30 ten thousand times and free of falling damage.
According to comparative example 1 it can be seen that: the polyaspartic acid ester resin with different structures is adopted, the steric hindrance of the annular structure of the F524 resin is large, the activity of active hydrogen of secondary amine groups in the polyaspartic acid ester resin is low, the curing reaction with a curing agent is influenced, the curing is incomplete under the normal temperature condition, the strength is low, and the rubbing resistance is damaged after 20 ten thousand times of curing.
According to comparative example 2 it can be seen that: the N3800 curing agent is adopted, N3800 is a curing agent with excellent weather resistance and flexibility, and the prepared coating has excellent weather resistance, good elasticity, good toughness, low strength and poor rubbing resistance.
According to comparative example 3 it can be seen that: by adopting the N3900 curing agent, the weather resistance is excellent, the flexibility is deviated, and the skin is broken and damaged when being folded in half.
As can be seen from comparative example 4: the HT100 curing agent is adopted, so that the weather resistance is excellent, the flexibility is deviated, and the skin is broken and damaged when folded in half.
According to comparative example 5 it can be seen that: GB805B-100 curing agent is adopted, GB805B-100 is polyether modified curing agent, flexibility is good, strength is high, and the curing agent is well matched with oxford skin, but weather resistance of the polyether modified curing agent is deviated. However, the coating obtained by matching the polyether modified curing agent with the resin of the invention has poor weather resistance.
Claims (7)
1. A polyaspartic acid ester coating for skin comprises two components A and B, and is characterized in that the mass ratio of the component A to the component B is 1-3; the component A comprises 12 to 25 parts of polyaspartic ester resin and 50 to 60 parts of solvent by weight; the component B comprises an HDI trimer curing agent and an IPDI modified polyester curing agent; the mass ratio of the HDI tripolymer curing agent to the IPDI modified polyester curing agent is 1;
the structure of the polyaspartic acid ester resin is as follows:
2. The polyaspartate coating for skin according to claim 1, wherein in R1, n is 1 or 2, and m is 3 or 4.
3. The polyaspartic acid ester coating for the skin as claimed in claim 1, wherein the HDI trimer curing agent is Bayer N3390 curing agent, and the IPDI modified polyester curing agent is GB926-85 curing agent.
4. The polyaspartic ester coating for the skin as claimed in claim 1, wherein the component A further comprises 5-9 parts of matting powder, 0.5-2 parts of defoaming agent and 5-25 parts of pigment.
5. The polyaspartate coating for the skin of claim 1, wherein the solvent is one or more of xylene, trimethylbenzene and butyl acetate.
6. The method for preparing the polyaspartate coating for the skin according to any one of claims 1 to 5, comprising the steps of:
sequentially adding the components A according to the weight percentage under the stirring state, uniformly stirring and grinding for later use;
mixing the components in the component B according to the weight parts for later use; mixing the components A and B at a certain ratio before use.
7. Use of the polyaspartate coating for skinning according to any of claims 1 to 5 in the preparation of camouflage equipment.
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| CN115710828B (en) | 2024-05-14 |
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