CN111925722A - Wear-resistant waterproof coating and preparation method thereof - Google Patents
Wear-resistant waterproof coating and preparation method thereof Download PDFInfo
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- CN111925722A CN111925722A CN202010756835.5A CN202010756835A CN111925722A CN 111925722 A CN111925722 A CN 111925722A CN 202010756835 A CN202010756835 A CN 202010756835A CN 111925722 A CN111925722 A CN 111925722A
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- component
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- waterproof coating
- resistant waterproof
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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
- C09D175/02—Polyureas
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
Abstract
The invention discloses a wear-resistant waterproof coating and a preparation method thereof, the raw materials of the wear-resistant waterproof coating comprise a component A and a component B, the raw materials of the component A comprise, by weight, 80-100 parts of isocyanate, 2-5 parts of chain extender, 1-2 parts of dimethylacetamide, 5-8 parts of plasticizer, 5-10 parts of water absorbent, 0.5-2 parts of wear-resistant filler and 0.05-0.2 part of silane coupling agent, the raw materials of the component B comprise 60 to 80 parts of amine-terminated polyether, 0.2 to 0.5 part of dispersant and 2 to 10 parts of dehydrating agent by weight, the preparation method of the wear-resistant waterproof coating is simple, and polyurea is further matched with the wear-resistant filler through polyurea to generate the wear-resistant waterproof coating, so that the wear resistance of the waterproof coating is further improved, the curing speed is high, and the using method is simple.
Description
Technical Field
The invention relates to the technical field of waterproof coatings, and particularly relates to a wear-resistant waterproof coating and a preparation method thereof.
Background
The polyurea coating is a fast-curing green environment-friendly elastic waterproof material, adopts a one-step coating process, has no chain joint no matter how large the area is, is a dust-free material polyurea coating, and has the characteristics of strong adhesive force, friction resistance, strong hardness and the like.
With the development of science and technology, the wear-resisting property requirement of common polyurea coating can not meet the requirement of people on the wear-resisting property of waterproof coating, and the wear-resisting property of most of the existing polyurea coatings is not enough, so that the wear-resisting property of the polyurea coating is abraded, and the normal use of equipment is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a waterproof coating with excellent wear resistance and a preparation method thereof, and the technical scheme is as follows:
the wear-resistant waterproof coating comprises a component A and a component B, wherein the raw materials of the component A comprise, by weight, 80-100 parts of isocyanate, 2-5 parts of a chain extender, 1-2 parts of dimethylacetamide, 5-8 parts of a plasticizer, 5-10 parts of a water absorbent, 0.5-2 parts of a wear-resistant filler and 0.05-0.2 part of a silane coupling agent, and the raw materials of the component B comprise, by weight, 60-80 parts of amino-terminated polyether, 0.2-0.5 part of a dispersing agent and 2-10 parts of a dehydrating agent.
Preferably, the weight ratio of the A component to the B component is 1-2: 1.
The weight ratio of the component A to the component B ensures that the component A and the component B can be uniformly mixed and then have prepolymerization reaction.
Preferably, the isocyanate in the component A is one of diphenylmethane cyanate.
The benzene methane diisocyanate has small volatility and small harm to human bodies, and avoids the harm to the environment in the process of preparing the waterproof coating.
Preferably, the wear-resistant filler in the component A is one of silicon carbide, silicon dioxide and ferric oxide.
The silicon carbide, the silicon dioxide and the ferric oxide in the inorganic substance have good wear resistance, and the silicon dioxide and the ferric oxide can be uniformly dispersed in the mixture formed by the component A under the action of the silane coupling agent, so that the wear resistance of the waterproof coating is effectively improved on the premise of ensuring uniform dispersion of the silicon carbide, the silicon dioxide and the ferric oxide.
Preferably, the plasticizer in the A component is dioctyl phthalate or dibutyl phthalate.
Preferably, the chain extender in the a component is dimethylthiotoluenediamine.
The preparation method of the wear-resistant waterproof coating specifically comprises the following steps:
respectively weighing the component A and the component B according to the formula, respectively mixing the weighed raw materials of the component A and the B, and stirring and mixing the mixed raw materials of the component A and the mixed raw materials of the component B for 10-15min to obtain the wear-resistant waterproof coating.
The isocyanate, the chain extender and the amino-terminated polymer are subjected to polymerization reaction to generate polyurea, the polyurea has excellent wear resistance and can react without heating, the polyurea further conforms to the wear-resistant filler through the polyurea to generate the wear-resistant waterproof coating, the wear resistance of the waterproof coating is further improved, and the preparation method is simple, the curing speed is high, and the using method is simple.
The foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, the following is a detailed description of the preferred embodiments of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the invention. The invention is more particularly described in the following paragraphs with reference to examples. Advantages and features of the present invention will become apparent from the following description and from the claims.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Based on the above summary of the invention, examples 1-4 of the present invention are proposed as follows:
example 1
The raw materials of the component A of the wear-resistant waterproof coating material in the embodiment 1 comprise 80 parts by weight of diphenylmethane cyanate, 3 parts by weight of chain extender, 1 part by weight of dimethylacetamide, 8 parts by weight of plasticizer, 5 parts by weight of water absorbent, 0.5 part by weight of silicon dioxide and 0.1 part by weight of silane coupling agent; the raw materials of the component B comprise, by weight, 80 parts of amine-terminated polyether, 0.2 part of dispersant and 5 parts of dehydrating agent, and the weight ratio of the component A to the component B of the wear-resistant waterproof coating is 1: 1.
The raw materials of the component A and the component B of the wear-resistant waterproof coating material in the embodiment 1 are respectively mixed, and then the mixed component A and the mixed component B are stirred and mixed for 10-30min to obtain the wear-resistant waterproof coating material.
Example 2
The raw materials of the component A of the wear-resistant waterproof coating material in the embodiment 2 comprise 90 parts of diphenylmethane cyanate, 5 parts of chain extender, 1.5 parts of dimethylacetamide, 5 parts of plasticizer, 10 parts of water absorbent, 1 part of silicon dioxide and 0.05 part of silane coupling agent in parts by weight; the raw materials of the component B comprise, by weight, 60 parts of amine-terminated polyether, 0.3 part of dispersant and 2 parts of dehydrating agent, and the weight ratio of the component A to the component B of the wear-resistant waterproof coating is 2: 1.
The raw materials of the component A and the component B of the wear-resistant waterproof coating material in the embodiment 2 are respectively mixed, and then the mixed component A and the mixed component B are stirred and mixed for 10-30min to obtain the wear-resistant waterproof coating material.
Example 3
The raw materials of the component A of the wear-resistant waterproof coating material in the embodiment 3 comprise, by weight, 95 parts of diphenylmethane cyanate, 4 parts of chain extender, 2 parts of dimethylacetamide, 7 parts of plasticizer, 8 parts of water absorbent, 2 parts of silicon dioxide and 0.1 part of silane coupling agent; the raw materials of the component B comprise 70 parts of amine-terminated polyether, 0.4 part of dispersant and 8 parts of dehydrating agent by weight, and the weight ratio of the component A to the component B of the wear-resistant waterproof coating is 1.5: 1.
The raw materials of the component A and the component B of the wear-resistant waterproof coating material in the embodiment 3 are respectively mixed, and then the mixed component A and the mixed component B are stirred and mixed for 10-30min to obtain the wear-resistant waterproof coating material.
Example 4
The raw materials of the component A of the wear-resistant waterproof coating material in example 4 comprise, by weight, 100 parts of diphenylmethane cyanate, 2 parts of chain extender, 1.5 parts of dimethylacetamide, 6 parts of plasticizer, 6 parts of water absorbent, 1.5 parts of silica and 0.2 part of silane coupling agent; the raw materials of the component B comprise 65 parts of amino-terminated polyether, 0.5 part of dispersant and 10 parts of dehydrating agent by weight, and the weight ratio of the component A to the component B of the wear-resistant waterproof coating is 1.2: 1.
The raw materials of the component A and the component B of the wear-resistant waterproof coating material in the embodiment 4 are respectively mixed, and then the mixed component A and the mixed component B are stirred and mixed for 10-30min to obtain the wear-resistant waterproof coating material.
Comparative example 1
The comparative example used polyurea elastomer as the waterproof coating.
The waterproof coatings obtained in examples 1 to 4 and the waterproof coating of comparative example 1 were subjected to abrasion resistance, water resistance, and hardness tests according to the following test principles:
wear resistance: after the turntable is weighed, 500g of waterproof coating is coated on the turntable and then is cured for 30min, the turntable with the weight equal to 1kg is pressed on the waterproof coating, the waterproof coating is rapidly rubbed for 15min at the rotating speed of 60r/min, a sample is taken down, the turntable is weighed again, and the abrasion loss of the waterproof coating is calculated;
water resistance: coating 10g of waterproof paint on a plastic film, soaking the plastic film in water for 24 hours, taking out the plastic film, sucking water on the surfaces of the waterproof paint and the plastic film, weighing, and calculating the water absorption rate of the waterproof paint;
and (3) hardness testing: and (3) coating 10g of the waterproof coating on the smooth surface, waiting for curing for 30min, and testing the hardness of the cured waterproof coating by using a hardness tester.
The results of performance tests of the waterproof coatings obtained in examples 1 to 4 are shown in Table 1.
TABLE 1
| Examples | Amount of wear (g) | Water absorption (%) | hardness/HA |
| Example 1 | 0.25 | 1.98 | 78 |
| Example 2 | 0.21 | 1.87 | 82 |
| Example 3 | 0.18 | 1.85 | 80 |
| Example 4 | 0.19 | 1.93 | 83 |
| Comparative example 1 | 0.30 | 2.03 | 80 |
According to the results of the test in table 1, the abrasion loss of the waterproof coating after being compounded with the abrasion-resistant filler is obviously reduced, which indicates that the abrasion resistance of the waterproof coating after being compounded is obviously improved compared with that of the polyurea elastomer, the waterproof performance of the waterproof coating in examples 1-4 is not obviously reduced, and the hardness of the waterproof material in some examples is slightly reduced.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner; those of ordinary skill in the art can readily practice the present invention as described herein; however, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the scope of the invention as defined by the appended claims; meanwhile, any changes, modifications, and evolutions of the equivalent changes of the above embodiments according to the actual techniques of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. The wear-resistant waterproof coating is characterized by comprising a component A and a component B, wherein the raw materials of the component A comprise, by weight, 80-100 parts of isocyanate, 2-5 parts of a chain extender, 1-2 parts of dimethylacetamide, 5-8 parts of a plasticizer, 5-10 parts of a water absorbent, 0.5-2 parts of a wear-resistant filler and 0.05-0.2 part of a silane coupling agent, and the raw materials of the component B comprise, by weight, 60-80 parts of amino-terminated polyether, 0.2-0.5 part of a dispersing agent and 2-10 parts of a dehydrating agent.
2. The abrasion-resistant waterproof coating material according to claim 1, wherein the weight ratio of the A component to the B component is 1-2: 1.
3. The abrasion-resistant waterproof coating material according to claim 1, wherein the isocyanate in the component A is diphenylmethane cyanate.
4. The wear-resistant waterproof coating material of claim 1, wherein the wear-resistant filler in the component A is silicon carbide, silicon dioxide or ferric oxide.
5. The abrasion-resistant waterproof coating material according to claim 1, wherein the plasticizer in the component A is dioctyl phthalate or dibutyl phthalate.
6. The abrasion-resistant waterproof coating material according to claim 1, wherein the chain extender in the A component is dimethylthiotoluenediamine.
7. The preparation method of the wear-resistant waterproof coating as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
respectively weighing the component A and the component B according to the formula, respectively mixing the weighed raw materials of the component A and the B, and stirring and mixing the mixed raw materials of the component A and the mixed raw materials of the component B for 10-15min to obtain the wear-resistant waterproof coating.
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| CN202010756835.5A CN111925722A (en) | 2020-07-31 | 2020-07-31 | Wear-resistant waterproof coating and preparation method thereof |
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Application publication date: 20201113 |