CN115260908A - Low-density non-cured coating and preparation method thereof - Google Patents

Abstract

The invention discloses a low-density non-cured coating and a preparation method thereof, wherein the low-density non-cured coating comprises the following components in parts by mass: 35-55 parts of asphalt, 10-30 parts of oil, 2-8 parts of SBS, 0-6 parts of SBR, 0-7 parts of pre-sol, 1-5 parts of wax powder, 10-30 parts of silica powder and 10-32 parts of stone powder, wherein at least one of the SBR and the pre-sol is not 0, and the raw materials are mixed and stirred to prepare the low-density non-cured coating; the silicon powder adopted by the invention has the characteristics of small stacking density and large void volume, and the modified asphalt can obtain higher filling amount after the silicon powder is added, thereby affecting the performance of the coating. The invention reduces the density of the non-cured coating, improves the service capacity of the non-cured coating and improves the construction applicability of the non-cured coating.

Description

Low-density non-cured coating and preparation method thereof

Technical Field

The invention belongs to the technical field of coatings, and particularly relates to a low-density non-cured coating and a preparation method thereof.

Background

The non-cured rubber asphalt coating is a common coating, and although various physical and mechanical properties of the conventional non-cured coating meet the requirements of JC/T2428-2017 at present, the product appearance still has defects, such as dull appearance, no light, pores, middle sinking, low liquid level, construction applicability which does not meet the technical requirements, hot melting time is long during construction on site in a construction site, impurities exist, the wire drawing effect cannot meet the expected requirements, construction is inconvenient, the unit usage amount of the coating is large, and the construction cost is high.

The above-mentioned defects of the current non-curing coating are caused by the relatively high density of the non-curing coating, the usage amount per unit area exceeds the expected usage amount, the non-curing coating is generally added with inorganic salt filling materials such as stone powder to reduce the cost, and the density of the non-curing coating is generally more than 1.2g/cm³Due to the addition of the inorganic salt filling material, the product is easy to deposit and delaminate after being cooled after being filled at high temperature in production, the performances such as storage stability, aging resistance and the like are reduced, the product is not easy to melt in the construction process, the consumed time is long, impurities are still difficult to melt after the product is melted to the end, and the self-healing property and the peristalsis property of the non-solidified coating are directly greatly influenced. Therefore, it is necessary to provide a new low-density non-curable coating material to solve the above problems.

Disclosure of Invention

In order to solve the above technical problems, an object of the present invention is to provide a low-density non-curable coating material and a preparation method thereof, which can reduce the density of the non-curable coating material, improve the usability of the non-curable coating material, and improve the applicability of the non-curable coating material.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

in a first aspect of the present invention, the present invention provides a low-density non-curable coating, comprising, in parts by mass: 35-55 parts of asphalt, 10-30 parts of oil, 2-8 parts of SBS, 0-6 parts of SBR, 0-7 parts of pre-sol, 1-5 parts of wax powder, 10-30 parts of silica powder and 10-32 parts of stone powder, wherein at least one of the SBR and the pre-sol is not 0.

The silicon powder adopted by the invention has the characteristics of small stacking density and large void volume, and the modified asphalt can obtain higher filling amount after the silicon powder is added, thereby affecting the performance of the coating.

Preferably, the components of the low-density non-cured coating comprise, in parts by mass: 35-55 parts of asphalt, 10-30 parts of oil, 2-8 parts of SBS, 2-6 parts of SBR, 2-7 parts of pre-sol, 1-5 parts of wax powder, 10-30 parts of silica powder and 10-32 parts of stone powder, wherein the ratio of the pre-sol to the SBR is (1-2): 1.

in the invention, both the premelt and the SBR can improve the viscosity of the system, but when only one of the premelt and the SBR is added, the adhesion reaches a peak value along with the increase of the addition amount and then decreases, and cannot be improved continuously; the pre-sol and SBR are added in proportion to play a better balance role, so that the viscosity can exceed the highest value when the single SBR is used, and higher viscosity is obtained.

Preferably, the silicon powder is silicon powder for organosilicon. The silicon powder for organosilicon is a compound which contains Si-O bonds and has an organic group directly connected with a silicon atom. The organic silicon is a bridge for connecting organic materials and inorganic materials, and has excellent thermal stability, super-strong adhesion performance, chemical stability, lasting elastic toughness adaptability, superior tensile strength, defoaming performance and antimicrobial performance. According to the invention, the silicon powder for organic silicon is mixed with the modified asphalt, so that the effect of reducing the density of the coating can be achieved, the performance of the coating can be enhanced, and the problem of more foaming of the coating can be solved.

Preferably, the silicon powder is 200-325 mesh silicon powder for organosilicon. The mesh number of the silicon powder also influences the performance of the coating, and the larger the mesh number is, the larger the specific surface area of the silicon powder is, the loose density is small, the contact area with the modified asphalt is large, and the silicon powder is beneficial to reducing the density of the coating and increasing the binding power of the coating.

Preferably, the mass ratio of the silicon powder to the mountain flour is 1. If the adding amount of the silicon powder is too small, the effect on the whole coating is small, the improvement of the construction applicability is not obvious, but if the adding amount is too large, the cost is greatly increased, the production is not favorable, the characteristics of low density and high performance of the silicon powder can be fully exerted in the coating within the proportion range, and on the premise of meeting the performance index, the adding amount of the expensive high-temperature modifier can be reduced.

In a second aspect of the present invention, the present invention provides a method for preparing a low-density non-cured coating, which is used for preparing the low-density non-cured coating, and comprises the following specific steps:

(1) Melting the bitumen and maintaining it in a pumpable state;

(2) Adding an oil product with the temperature not higher than 40 ℃ into the asphalt, and stirring and heating;

(3) Adding wax powder, adding pre-sol and/or SBR, continuing stirring and heating to 150-160 ℃, and keeping stirring at constant temperature;

(4) Adding the flowing asphalt again, and continuing stirring and heating; the asphalt is added once again, so that the components such as the modifier, the wax powder and the like can be pressed down to prevent the components from floating on the surface, the mixing is more uniform, the efficiency is improved, and the time required by modification is shortened;

(5) When the temperature reaches 165-175 ℃, adding SBS to modify the asphalt, and stirring and dispersing;

(6) After stirring, grinding the mixture, and then stirring again;

(7) Adding silica powder and stone powder, quickly stirring, cooling, reversely stirring, standing, and discharging.

Preferably, in the step (7), the discharge temperature is controlled to be 150-160 ℃.

Has the beneficial effects that:

according to the invention, the organosilicon silicon powder is added into the non-cured coating to replace part of stone powder, so that the modified asphalt has higher filling amount, the performance of the non-cured coating is improved, the silicon powder is used as a bridge for connecting organic components and inorganic components in the coating, the density of the non-cured coating is reduced, the problem of more bubbles of the coating is solved, the phenomenon of precipitation of the non-cured coating during cooling and standing is solved, the non-cured coating forms a relatively stable system, and the condition of layering or separation cannot easily occur, and the components such as a modifier, wax powder and the like can be pressed down by the preparation method of adding the asphalt twice, so that the components are prevented from floating on the surface, thereby enabling the mixing to be more uniform, improving the efficiency and reducing the time required by modification. The invention reduces the density of the non-cured coating, improves the using capacity of the non-cured coating, improves the construction applicability of the non-cured coating, increases the construction effect of the non-cured coating and improves the market competitiveness.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following describes specific embodiments of the present invention. It is obvious that the following description is only of some embodiments of the invention, and that for a person skilled in the art, other embodiments can be obtained according to these embodiments without inventive step.

The invention provides a low-density non-cured coating which comprises the following components in parts by weight:

35-55 parts of asphalt, 10-30 parts of oil product, 2-8 parts of SBS, 0-6 parts of SBR, 0-7 parts of pre-sol, 1-5 parts of wax powder, 10-30 parts of silica powder and 10-32 parts of stone powder, wherein at least one of the SBR and the pre-sol is not 0, namely, in the low-density non-cured coating, either SBR or the pre-sol can be contained, or both SBR and the pre-sol can be contained, and more preferably, the ratio of the pre-sol to SBR is (1-2): 1.

preferably, the silicon powder is silicon powder for organosilicon with the mesh number of 200-325 meshes, such as silicon powder for organosilicon produced by Zhejiang Kaiyuan silicon industry, inc., so as to reduce the density of the coating and improve the high-temperature performance of the coating.

The silicon powder particles are very tiny, the particle size is single, the silicon powder has the characteristics of low stacking density and large void volume, and the modified asphalt can obtain higher filling amount by adding the silicon powder into the modified asphalt, so that the performance of the coating is positively influenced. Specifically, the silicon powder has low bulk density and high filling amount, so that the silicon powder can obtain better dispersion degree in the asphalt; the silica powder has large specific surface area and large bonding area with the asphalt, so that the bonding force between a non-solidified surface and a base surface is increased; the micro-void structure between the silicon powder particles is equivalent to a micro-capillary tube, has a capillary action, and improves the interface acting force between the silicon powder particles and the asphalt; the addition of the silicon powder enables the asphalt to form a plurality of micro-deformation areas in the matrix when the asphalt is acted by external force, and the energy generated by the external force is consumed, so that the effect of toughening and reinforcing the asphalt oil is achieved, the problem of the wire drawing effect of the non-cured coating is solved, and the physical and mechanical properties of the coating are improved. And due to the principle of similarity and intermiscibility, the mixing of the silicon powder and the asphalt can form a stable system, the phenomenon of layering or separation is not easy to occur, and the phenomenon of precipitation of the existing non-solidified coating during cooling and standing is solved.

In the invention, the ratio of the silica powder to the stone powder is controlled to be between 1.8 and 1:2, and the characteristics of low density and high performance of the silica powder are fully exerted in the coating within the ratio range.

Preferably, the asphalt is regular road asphalt, brand number 90 #.

Preferably, the oil product is the conventional oil product, such as 60# produced by Shenzhen treasure Shenshu Co., ltd or 35# produced by Anhui east Jiaxin building materials science Co., ltd, which is used as the base oil of the non-cured product, so that the low-temperature performance of the coating is improved, and the melting degree of other modifiers is improved.

Preferably, the SBS is 3411 or 3501 produced by Qiyang industry Co., ltd, huizhou, and has effects of improving high and low temperature performance of the coating and increasing elasticity.

Preferably, the pre-sol is 0506 produced by Xuzhou Hongshun high-tech materials Co, ltd, so that the cohesion and the bonding force of the coating are increased.

Preferably, the SBR is selected from 95% SBR, 92% SBR manufactured by Shandong Gaokou Kogyo Co., ltd, which increases the cohesion and adhesion of the coating material and improves the drawing effect of the coating material.

Preferably, the wax powder is prepared from Ganzhi 602 produced by Changzhou Kesai successful plastic material Co., ltd and 8903 produced by Shenzhen Luqi Material science and technology Co., ltd, so that the high-temperature performance of the coating is improved.

Preferably, the stone powder is 600 meshes, 325 meshes or 1250 meshes produced by Tianyi calcium industry GmbH of Huzhou, and is used as a filling material, so that the cost is reduced.

The invention also provides a preparation method of the low-density non-cured coating, which comprises the following specific steps:

(1) Heating an asphalt storage tank to 110-120 ℃, keeping the pumpable state (namely flow state) of the asphalt, and keeping the temperature of an oil product storage tank below 40 ℃;

(2, adding an oil product with the temperature not higher than 40 ℃ into the asphalt, heating to over 120 ℃ under the condition of stirring at 16Hz, and stirring for 15min;

(3) Adding pre-sol (and/or SBR) and wax powder, stirring at 16Hz, heating, keeping constant temperature and stirring for 20min when the temperature is increased to 150-160 ℃, and then rapidly stirring and dispersing for 30min under the stirring state of 40 Hz;

(4) Adding the flowing asphalt again, then heating to 160-170 ℃, and stirring for 20min;

(5) When the temperature reaches 165-175 ℃, adding SBS to modify the asphalt, and rapidly stirring for 60min at 40 Hz;

(6) After stirring and dispersing, grinding the mixture once by a colloid mill, and continuously stirring for 30min at 16 Hz;

(7) Adding silica powder and stone powder, rapidly stirring at 30Hz for 40min, cooling to below 160 ℃, reversely stirring at 10Hz for 10min, standing for 30min, and discharging, wherein the discharging temperature is controlled at 150-160 ℃.

In the present invention, the pre-sol and the SBR may be used simultaneously, or only either one of the pre-sol and the SBR may be used.

The technical scheme of the invention is described in detail by specific comparative examples and examples, wherein the non-curing coating is prepared by the preparation method of the comparative examples and the examples.

Comparative example

Comparative example 1

The specific components of this comparative example 1 are: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 3.5 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602 and 28 parts of 600-mesh stone powder.

Comparative example 2

The specific components of this comparative example 2 were: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 3.5 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602, 7 parts of 200-mesh silicon powder and 21 parts of 325-mesh stone powder.

Comparative example 3

The specific components of this comparative example 3 are: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 3.5 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602, 15 parts of 200-mesh silicon powder and 13 parts of 325-mesh stone powder.

Comparative example 4

The specific components of this comparative example 4 are: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 3.5 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602, 28 parts of 200-mesh silicon powder and 0 part of 325-mesh stone powder.

Comparative example 5

The specific components of this comparative example 5 are: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 0.7 part of SBR, 2.8 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder matcha 602, 28 parts of 200-mesh silicon powder and 0 part of 325-mesh stone powder, wherein the ratio of the pre-sol to the SBR is 4:1.

comparative example 6

The specific components of this comparative example 6 were: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 0.7 part of SBR, 2.8 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602, 20 parts of 200-mesh silicon powder and 8 parts of 325-mesh stone powder.

Examples

Example 1

The concrete components of the embodiment 1 are as follows: 49 parts of asphalt, 14 parts of No. 35 oil product, 2.5 parts of SBS3411, 3.5 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602, 15 parts of 325-mesh silica powder and 13 parts of 1250-mesh stone powder.

Example 2

The concrete components of the embodiment 2 are as follows: 47.5 parts of asphalt, 16 parts of No. 35 oil product, 2.0 parts of SBS3411, 4 parts of pre-sol 0506, 1.5 parts of wax powder 8903, 1 part of wax powder Kesai 602, 15 parts of 325-mesh silica powder and 13 parts of 1250-mesh stone powder.

Example 3

The concrete components of the embodiment 3 are as follows: 45 parts of asphalt, 19 parts of 35# oil product, 2.0 parts of SBS3411, 2 parts of SBR, 2 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder kesai 602, 15 parts of 200-mesh silicon powder and 12 parts of 1250-mesh stone powder.

Example 4

The concrete components of the embodiment 4 are as follows: 45 parts of asphalt, 19 parts of 35# oil product, 2.0 parts of SBS3411, 2 parts of SBR, 2 parts of pre-sol 0506, 1 part of wax powder 8903, 2 parts of wax powder Cusai 602, 15 parts of 325-mesh silica powder and 12 parts of 1250-mesh stone powder.

The specific component comparisons of comparative examples 1 to 6 and examples 1 to 4 are shown in table 1, in which the components are expressed in mass percent (%).

The results of the coating tests of comparative examples 1 to 6 and examples 1 to 4 are shown in Table 2.

TABLE 1 specific compositions of comparative examples and examples

TABLE 2 test results of comparative examples and examples

According to the test result of the comparative example 1, under the condition of not using silicon powder, the physical and mechanical properties of the non-cured coating meet the standard requirement and have a certain margin, but the density is far higher than the standard requirement, the unit area usage is increased during the specification construction, the economy is insufficient, the product appearance and the construction applicability are poor, and the improvement is needed.

According to the test results of comparative example 2, it can be seen that the density of the non-cured coating is significantly reduced but still higher than the density value required by the standard after a small portion of stone powder is replaced by 200 mesh silica powder, and after the silica powder is used, the heat resistance and low temperature performance of the physical mechanical properties of the non-cured coating are not significantly changed, but the extensibility is improved, and the problems of the appearance and construction applicability of the non-cured coating still exist. From the test results of comparative example 2, it is possible to add silicon powder to the non-curable coating.

According to the test result of the comparative example 3, when the ratio of the silica powder to the stone powder is close to 1:1, the density of the non-cured coating is continuously reduced, the physical and mechanical properties are not obviously changed, and the construction applicability and the appearance are greatly improved.

From the test results of comparative examples 2 to 3 and examples 2 to 4, it is understood that the appearance of the non-cured coating is effectively improved when the content of stone powder is reduced, wherein the appearance of the non-cured coating is acceptable and the gloss is higher when the content of stone powder is reduced and the ratio of silica powder to stone powder is within the range of the present invention.

According to the test results of comparative example 4, it can be seen that the density of the non-cured coating is improved, the heat resistance is also improved, and the appearance and the construction applicability are not obviously changed after the silica powder is completely substituted for the stone powder, and from the test results of comparative example 4, the stone powder and the silica powder both have a positive effect on reducing the density of the non-cured coating, and the silica powder cannot be completely substituted for the stone powder.

According to the test results of the examples 1 and 2, when the part of the oil is increased, the appearance of the non-cured coating is better, and according to the test results of the comparative examples 2-3 and the examples 1-3, the part of the oil is properly increased, the part of the stone powder is properly reduced, and the appearance of the non-cured coating can be effectively improved. From the test results of examples 2-4, it can be seen that the non-cured coating is greatly changed after the high-mesh silicon powder and the stone powder are used, the physical and mechanical properties are slightly improved, and the problems of appearance and construction applicability are solved, particularly, the non-cured coating has better appearance after the high-mesh silicon powder is used; the density of the non-cured coating substantially meets the requirements.

The embodiments provided by the present invention have been explained in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can also make several improvements and modifications, and those improvements and modifications also fall into the protection scope of the present claims.

Claims (8)

1. The low-density non-cured coating is characterized by comprising the following components in parts by mass: 35-55 parts of asphalt, 10-30 parts of oil, 2-8 parts of SBS, 0-6 parts of SBR, 0-7 parts of pre-sol, 1-5 parts of wax powder, 10-30 parts of silica powder and 10-32 parts of stone powder, wherein at least one of the SBR and the pre-sol is not 0.

2. The low-density non-curable coating according to claim 1, wherein the silicon powder is a silicon powder for silicone.

3. The low-density non-curable coating according to claim 2, wherein the silicon powder is 200 to 325 mesh silicon powder for organosilicon.

4. The low-density non-curable coating according to claim 1, wherein the mass ratio of the silica powder to the stone powder is 1.8 to 1:2.

5. The low-density non-curable coating according to claim 1, wherein the components of the low-density non-curable coating comprise, in parts by mass: 35 to 55 parts of asphalt, 10 to 30 parts of oil, 2 to 8 parts of SBS, 2 to 6 parts of SBR, 2 to 7 parts of pre-sol, 1 to 5 parts of wax powder, 10 to 30 parts of silica powder and 10 to 32 parts of stone powder.

6. The low density non-curable coating according to claim 5, wherein the ratio of pre-sol to SBR is (1-2): 1.

7. a method for preparing a low-density non-curable coating, characterized in that it is used to prepare a low-density non-curable coating according to any one of claims 1 to 6, by the following steps:

(1) Melting and maintaining the asphalt in a molten state;

(2) Adding an oil product with the temperature not higher than 40 ℃ into the asphalt, and stirring and heating;

(3) Adding wax powder, adding pre-sol and/or SBR, continuing stirring and heating to 150-160 ℃, and keeping stirring at constant temperature;

(4) Adding the flowing asphalt again, and continuing stirring and heating;

(5) When the temperature reaches 165-175 ℃, adding SBS to modify the asphalt, and stirring and dispersing;

(6) After stirring, grinding the mixture, and then stirring again;

(7) Adding silica powder and stone powder, quickly stirring, cooling, reversely stirring, standing, and discharging.

8. The method for preparing a low-density non-curable coating according to claim 7, wherein in the step (7), the discharge temperature is controlled to 150 to 160 ℃.