CN112624665A - Artificial stone for wall and ground and preparation method thereof - Google Patents
Artificial stone for wall and ground and preparation method thereof Download PDFInfo
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- CN112624665A CN112624665A CN202011591966.9A CN202011591966A CN112624665A CN 112624665 A CN112624665 A CN 112624665A CN 202011591966 A CN202011591966 A CN 202011591966A CN 112624665 A CN112624665 A CN 112624665A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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Abstract
The invention provides an artificial stone for wall surfaces and floors and a preparation method thereof, and the artificial stone comprises the following raw materials in percentage by weight: 4-9% of unsaturated resin, 0.5-1.5% of curing agent and the balance of stone aggregate; the content of styrene in the unsaturated resin is not more than 35 percent; the viscosity of the unsaturated resin is 0.20-0.65 Pa.s. The artificial stone prepared by using the unsaturated resin with specific viscosity and specific styrene content and matching with the high-energy pressing process has the linear thermal expansion coefficient less than 2.5x10‑5The artificial stone has small volume change and good dimensional stability under the condition of temperature change, can be applied to walls and ground, and widens the application scenes of the artificial stone. Meanwhile, the artificial stone has few components, no new component is added, the preparation process is simple, and industrial large-scale production can be realized.
Description
Technical Field
The invention relates to the field of artificial stones, in particular to an artificial stone capable of being used for walls and floors and a preparation method thereof.
Background
As a necessary basic building material, natural stone has the following five properties: the natural stone is easy to obtain, machine-shaping and transport, and has excellent mechanical property, durability and wide application, but the natural stone is gradually limited to be mined along with the reasons of excessive increase of mining amount, low mining utilization rate and the like, and the product of each mining area has unique color and variety, so that the difficulty in use is increased. People are always looking for alternatives.
With the gradual improvement of living standard of people, the synthetic stone is more and more popular to people as a novel building material due to beautiful color, novel pattern and elegant decorative effect, and various synthetic stones are produced.
The artificial stone is a third-generation stone following natural stones (granite, marble) and firing bricks (ceramic tiles, microlites and the like), has the advantages of greenness, environmental protection, safety, health, excellent quality, quick installation, rich colors, various styles, strong decoration and the like, and has higher hardness and better wear resistance compared with the natural stones.
Although the artificial stone has a plurality of advantages, the problem of large expansion coefficient exists, if the artificial stone is applied to the ground or the wall, the engineering quality is difficult to guarantee for a long time, and hollowing, corner raising and even cracking are easy to occur, so that in practice, the artificial stone is mainly used for cabinet table tops and the like, and a certain gap can be reserved between the table tops and the wall to avoid the problems of damage and the like caused by thermal expansion of artificial stone plates. But if lay in wall and ground, the gap of reserving is great then pleasing to the eye, is contrary to the original intention of adopting the rostone to do the decoration of ground or wall, and this has greatly restricted the application of rostone, and if can develop the coefficient of thermal expansion less, non-deformable's rostone panel has important meaning.
Disclosure of Invention
The invention mainly solves the technical problem of providing the artificial stone which can be used for the wall surface and the ground and the preparation method thereof, and has small thermal expansion coefficient and difficult deformation.
In order to solve the technical problems, the invention adopts a technical scheme that:
an artificial stone for wall and ground comprises the following raw materials in percentage by weight: 4-9% of unsaturated resin, 0.5-1.5% of curing agent and the balance of stone aggregate; the styrene content in the unsaturated resin is not more than 35%.
In one embodiment of the invention, the raw materials comprise the following components in percentage by weight: 7 percent of unsaturated resin, 1.0 percent of curing agent and the balance of stone aggregate.
Further, the viscosity of the unsaturated resin is 0.20-0.65 Pa.s.
In the field of artificial stones, the types of unsaturated resin commodities are many, and the inventor of the invention finds that when the content of styrene in the used unsaturated resin commodities is not more than 35% and the viscosity is within the range of 0.20-0.65 Pa.s, the expansion coefficient of the prepared artificial stone is low, and when the content of styrene in the used unsaturated resin commodities exceeds 35% and the viscosity is high, the prepared artificial stone plate has a large thermal expansion coefficient, is easy to warp, is fragile, not dense enough and has insufficient strength.
In the field, unsaturated resin products with styrene content less than 35% and viscosity within 0.2-0.65 Pa.s, such as Asterina TDS DRL 085, Changxing 2128V, Xinyang 7937, etc., can be applied to the invention.
Further, the unsaturated resin is shinyleaf pricklyash root 7937.
The Islamic blue TDS DRL 085, Changxing 2128V, Xinyang 7937 and the like refer to specific commodity models of resin, for example, the Xinyang 7937 refers to quartz stone resin with the model number of 7937 produced by Xinyang science and technology group.
Further, the curing agent is selected from one or more of methyl ethyl ketone peroxide, cycloethyl ketone peroxide and tert-butyl 2-ethylhexanoate peroxide.
Further, the stone aggregate is selected from one or more of quartz, natural stone particles, ceramic particles and ceramic powder.
Further, the paint also comprises pigment; further, the weight percentage of the pigment is 2%.
Further, the artificial stone has a linear thermal expansion coefficient of less than 2.5x10-5。
Further, the artificial stone has a linear thermal expansion coefficient of less than 2.0x10-5。
The invention also provides a preparation method of the artificial stone, which is characterized in that the vibration pressurizing energy during pressing is 1.6-3.0 kw per square meter, preferably 2.0-2.5 kw per square meter; the pressure is 50-80%, preferably 60-80% of the vibration force.
Further, the pressing time is 50 seconds to 180 seconds.
Further, the preparation method of the artificial stone comprises the following steps:
(1) mixing the components to obtain artificial stone pug;
(2) distributing artificial stone mud into a mold;
(3) carrying out vacuum vibration profiling on the artificial stone pug in a mould to form a plate body;
(4) and heating and curing the plate body.
Further, the vacuum degree of the vacuum vibration pressure type is that the pressure is less than or equal to 1500 Pa.
Further, the heating and curing temperature is 50-150 ℃, and preferably 100-150 ℃.
Compared with the prior art, the invention has the following beneficial effects:
(1) the artificial stone prepared by using the unsaturated resin with specific viscosity and specific styrene content and matching with the high-energy pressing process has the linear thermal expansion coefficient less than 2.5x10-5The artificial stone has small volume change and good dimensional stability under the condition of temperature change, can be applied to walls and ground, and widens the application scenes of the artificial stone.
(2) The invention has less stone-making components, no new components are added, the preparation process is simple, and the industrialized mass production can be realized.
Detailed Description
The technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The content of styrene in the unsaturated resin of Xinyang 7937, Shilan TDS DRL 085 and Changxing 2128V used in the embodiment is less than 35 percent, and the viscosity is within 0.2-0.65 Pa.s; the content of the unsaturated resin of rich water chestnut FL885N, rich water chestnut FL888MMA, Xintian and 721 is more than 35 percent, and the viscosity is more than 0.65 Pa.s.
Example 1
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Xinyang 7937), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.0kw per square meter, the pressure is 60 percent of the vibration force, and the pressing time is 100s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Example 2
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Xinyang 7937), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 3.0kw per square meter, the pressure is 80% of the vibration force, and the pressing time is 180s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Example 3
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Xinyang 7937), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Example 4
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Xinyang 7937), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 1.6kw per square meter, the pressure is 50% of the vibration force, and the pressing time is 50s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Example 5
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: 1919g of quartz sand 1000g, ceramic particles 600g and ceramic powder 319g, 80g of unsaturated resin (Xinyang 7937) and 1g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Example 6
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: 1827g of quartz sand 1000g, ceramic particles 600g, ceramic powder 227g, unsaturated resin (Xinyang 7937)170g, and methyl ethyl ketone peroxide 3 g.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, transferring the plate body into an oven for heating and curing, wherein the curing temperature is 150 ℃, and the curing time is 1h, so that a finished product of the artificial stone plate is obtained.
Example 7
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: 1817g of quartz sand 1000g, ceramic particles 600g and ceramic powder 217g, 180g of unsaturated resin (Xinyang 7937) and 3g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 150 ℃, and the curing time is 1.5 hours, so that a finished product of the artificial stone plate is obtained.
Example 8
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: 1000g of quartz sand, 600g of ceramic particles, 1858g of ceramic powder, 258g of unsaturated resin (Islamic TDS DRL 085), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Example 9
The artificial stone of the embodiment comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Changxing 2128V), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Comparative example 1
The artificial stone of the comparative example comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Fuling FL885N), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Comparative example 2
The artificial stone of the comparative example comprises the following raw materials: stone aggregate: 1000g of quartz sand, 600g of ceramic particles and 258g of ceramic powder, 1858g of unsaturated resin (rich diamond FL888MMA), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Comparative example 3
The artificial stone of the comparative example comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, ceramic powder 258g, unsaturated resin (Xintian and 721)140g, methyl ethyl ketone peroxide 2 g.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 2.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Comparative example 4
The artificial stone of the comparative example comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Xinyang 7937), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 1.5kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Comparative example 5
The artificial stone of the comparative example comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Xinyang 7937), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 1.0kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
Comparative example 6
The artificial stone of the comparative example comprises the following raw materials: stone aggregate: total 1858g of quartz sand 1000g, ceramic particles 600g, and ceramic powder 258g, 140g of unsaturated resin (Fuling FL885N), and 2g of methyl ethyl ketone peroxide.
(1) Weighing the raw materials according to the formula, pouring the stone aggregate into a stirring cylinder, and stirring for 10 minutes to uniformly mix the stone aggregate.
(2) And (3) adding unsaturated resin and methyl ethyl ketone peroxide into the stirring cylinder mixed with the stone aggregate in the step (1), and stirring for 10 minutes to uniformly mix the unsaturated resin and the methyl ethyl ketone peroxide to obtain the artificial stone pug.
(3) The artificial stone pug is flatly arranged in a die frame according to the required thickness, and a demoulding layer is respectively paved on the bottom surface and the top surface of the artificial stone pug.
(4) And (3) carrying out vacuum exhaust on the pug with the well-distributed demolding layer, then sending the pug into a forming device for vacuum vibration pressing, firstly vacuumizing to be within 1500Pa, starting vibration and pressurizing, wherein the energy of the vibration and pressurizing pressure is 1.0kw per square meter, the pressure is 70% of the vibration force, and the pressing time is 150s, thus obtaining the formed plate body.
(5) And demolding the plate body, and transferring the plate body into an oven for heating and curing, wherein the curing temperature is 100 ℃, and the curing time is 2 hours, so that a finished product of the artificial stone plate is obtained.
The artificial stone plate is subjected to performance detection by adopting European Union standard EN 15285-2008:
the linear expansion coefficients (25 to 130 ℃) of the artificial stone slabs manufactured in examples 1 to 9 and comparative examples 1 to 6 were measured, and the results are shown in table 1:
TABLE 1
According to the results in table 1, compared with the comparative example, the thermal expansion coefficients of examples 1 to 9 are lower and can be as low as 1.3, which shows that the artificial stone prepared by adopting the unsaturated resin with specific styrene content and specific viscosity and combining with the specific pressing process has better dimensional stability and lower thermal expansion coefficient, and can be applied to decoration of ground and wall surfaces. The artificial stone prepared by the conventional pressing process has a high thermal expansion coefficient, and is not suitable for being used on the ground or the wall.
The strength of the artificial stone slabs manufactured in examples 1 to 9 and comparative examples 1 to 6 was measured, and the results are shown in table 2:
TABLE 2
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An artificial stone for wall and ground is characterized in that the raw materials comprise the following components in percentage by weight: 4-9% of unsaturated resin, 0.5-1.5% of curing agent and the balance of stone aggregate; the styrene content in the unsaturated resin is not more than 35%.
2. An artificial stone according to claim 1, wherein the raw materials comprise the following components in weight percent: 7 percent of unsaturated resin, 1.0 percent of curing agent and the balance of stone aggregate.
3. An artificial stone according to claim 1, wherein the unsaturated resin has a viscosity of 0.20 to 0.65 pa.s;
further, the unsaturated resin is selected from one or more of Asterina TDSDRL 085, Changxing 2128V and Xinyang 7937, preferably Xinyang 7937.
4. An artificial stone according to claim 1, wherein the curing agent is selected from one or more of methyl ethyl ketone peroxide, cycloethyl ketone peroxide, and tert-butyl 2-ethylhexanoate peroxide.
5. An artificial stone according to claim 1, wherein the stone aggregate is selected from one or more of quartz sand, natural stone particles, ceramic particles, metal particles, ceramic powder.
6. An engineered stone according to claim 1, further comprising a pigment;
further, the pigment is an organic pigment and/or an inorganic pigment;
further, the pigment is 0-2% by weight.
7. An artificial stone according to any one of claims 1 to 6, having a coefficient of linear thermal expansion of less than 2.5x10-5Further, the artificial stone has a linear thermal expansion coefficient of less than 2.0x10-5。
8. A method for producing an artificial stone according to any one of claims 1 to 7, wherein the vibration pressurizing energy at the time of pressing is 1.6 to 3.0kw per square meter, preferably 2.0 to 2.5kw per square meter; the pressure is 50-80% of the vibration force, preferably 60-80%;
further, the pressing time is 50 seconds to 180 seconds.
9. A method of making an artificial stone according to claim 8, comprising the steps of:
(1) mixing the components to obtain artificial stone pug;
(2) distributing artificial stone mud into a mold;
(3) carrying out vacuum vibration profiling on the artificial stone pug in a mould to form a plate body;
(4) and heating and curing the plate body.
10. A method for producing an artificial stone according to claim 9, wherein a degree of vacuum of the vacuum vibration press is 1500Pa or less;
further, the heating and curing temperature is 50-150 ℃, and preferably 100-150 ℃.
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