CN115746772B - Toughened low-shrinkage marble adhesive - Google Patents
Toughened low-shrinkage marble adhesive Download PDFInfo
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- CN115746772B CN115746772B CN202211464944.5A CN202211464944A CN115746772B CN 115746772 B CN115746772 B CN 115746772B CN 202211464944 A CN202211464944 A CN 202211464944A CN 115746772 B CN115746772 B CN 115746772B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The invention belongs to the technical field of adhesives, and particularly relates to a toughened low-shrinkage marble adhesive. The component A comprises the following components in parts by weight: 100-150 parts of unsaturated polyester resin; 6-10 parts of a first shrinkage-resistant modifying component; 5-8 parts of a toughening agent; 30-60 parts of a first filler; the component B comprises the following components in parts by weight: 100-140 parts of peroxide initiator; 10-30 parts of a second shrinkage-resistant modified component; 20-60 parts of a blending agent; 40-100 parts of a second filler. The invention obviously improves the defect that the shrinkage property is large and the bonding property is affected in the curing stage of the marble adhesive by matching the first shrinkage-resistant modified component with low molecular weight and the second shrinkage-resistant modified component with high molecular weight, and obviously improves the defect that the brittleness is large and the adaptability deformation capability is weak after the curing of the marble adhesive by screening the toughening component. The marble adhesive has the advantages that the comprehensive performance is obviously improved, the application scene is further expanded, and the marble adhesive is expected to be used as a stone adhesive for bearing or assisting in bearing.
Description
Technical Field
The invention belongs to the technical field of adhesives, and particularly relates to a toughened low-shrinkage marble adhesive.
Background
According to industry standard, marble glue belongs to the product of executing JC/T989-2016 standard of stone adhesive for non-structural bearing, and is not used for stone dry hanging, and the main reason is that the marble glue uses unsaturated polyester resin as main resin, and shrinkage is obvious and appears brittle after solidification, so that the marble glue cannot be used for bearing, otherwise, the risk of stone falling exists. However, the marble adhesive has the advantages of quick solidification, low price and the like, and is widely applied in the industry, so that the improvement of shrinkage of the marble adhesive and the improvement of toughness of the marble adhesive have very important significance for improving the comprehensive performance of the marble adhesive and expanding the application of the marble adhesive.
Disclosure of Invention
Aiming at the problems of high shrinkage rate, poor toughness and weak bearing performance of the marble adhesive in the prior art, the invention provides the toughened low-shrinkage marble adhesive, which aims to inhibit shrinkage of the marble adhesive in the curing process and improve the toughness of the marble adhesive after curing, thereby improving the bearing performance of the marble adhesive. .
The toughened low-shrinkage marble adhesive provided by the invention comprises a component A and a component B;
the component A comprises the following components in parts by weight:
100-150 parts of unsaturated polyester resin;
6-10 parts of a first shrinkage-resistant modifying component;
5-8 parts of a toughening agent;
30-60 parts of a first filler;
the component B comprises the following components in parts by weight:
100-140 parts of peroxide initiator;
10-30 parts of a second shrinkage-resistant modified component;
20-60 parts of a blending agent;
40-100 parts of a second filler.
In the component A, the first shrinkage-resistant modified component is a component with low molecular weight shown in a formula I (shown in figure 1), and the X segment of the component A is polymerized by polyvinyl alcohol with low molecular weight.
In the component B, the second shrinkage-resistant modified component is a component shown in a high molecular weight formula I (shown in figure 1), and the X segment is polymerized from high molecular weight polyvinyl alcohol.
Further, in the toughened low-shrinkage marble adhesive, the polyvinyl alcohol used for polymerizing the X segment in the first shrinkage-resistant modified component has the viscosity in the range of 5.2-6.0 Pa.s and the alcoholysis degree in the range of 98.0-99.0 mol%.
Further, in the toughened low-shrinkage marble adhesive, the polyvinyl alcohol used for polymerizing the X segment in the second shrinkage-resistant modified component has the viscosity in the range of 54.0-66.0 Pa.s and the alcoholysis degree in the range of 98.0-99.0 mol%.
Further, in the A component of the toughened low-shrinkage marble adhesive, the toughening agent is chlorinated paraffin.
Further, in the component B of the toughened low-shrinkage marble adhesive, the blending agent is dimethyl phthalate and/or dibutyl phthalate.
Further, in the toughened low-shrinkage marble adhesive, the first shrinkage-resistant modified component is prepared by the following method:
step 1.1: placing polyvinyl alcohol in a sealable reactor, stirring and heating to 102-105 ℃, vacuumizing and dehydrating for 15-20min, and then cooling to 45-50 ℃;
step 1.2: adding toluene-2, 4-diisocyanate into the reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 9-12% of the dosage of the polyvinyl alcohol in the step 1.1, controlling the temperature to 70-75 ℃ under stirring, reacting for 60-90min, and cooling to 45-50 ℃;
step 1.3: adding hydroxyethyl methacrylate and toluene-2, 4-diisocyanate into the reactor, wherein the dosage of the hydroxyethyl methacrylate and the toluene-2, 4-diisocyanate is 6-10% of the dosage of the polyvinyl alcohol in the step 1.1, reacting for 60-90min under the stirring state at the temperature of 75-80 ℃, and cooling to room temperature to obtain the first anti-shrinkage modified component.
Further preferred process parameters in step 1.1 are as follows: stirring and heating to 105 ℃, and vacuumizing and dehydrating for 18min.
Further, in the toughened low-shrinkage marble adhesive, the second shrinkage-resistant modified component is prepared by the following method:
step 2.1: placing polyvinyl alcohol in a sealable reactor, stirring and heating to 102-105 ℃, vacuumizing and dehydrating for 40-55min, and then cooling to 45-50 ℃;
step 2.2: adding toluene-2, 4-diisocyanate into the reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 8-11% of the dosage of the polyvinyl alcohol in the step 2.1, controlling the temperature to 70-75 ℃ under stirring, reacting for 60-90min, and cooling to 45-50 ℃;
step 2.3: adding hydroxyethyl methacrylate and toluene-2, 4-diisocyanate into the reactor, wherein the dosage of the hydroxyethyl methacrylate and the toluene-2, 4-diisocyanate is 5-9% of the dosage of the polyvinyl alcohol in the step 2.1, reacting for 60-90min under the condition of stirring and controlling the temperature to 75-80 ℃, and cooling to room temperature to obtain the second shrinkage-resistant modified component.
Further preferred process parameters in step 2.1 are as follows: stirring and heating to 105 ℃, and vacuumizing and dehydrating for 45min.
Further, in the toughened low-shrinkage marble adhesive, the first filler is fumed silica; the second filler is nano calcium carbonate.
The beneficial effects are that: compared with the prior art, the toughened low-shrinkage marble adhesive provided by the invention has the advantages that the defects that the shrinkage performance is large and the adhesive property is influenced in the curing stage of the marble adhesive are obviously improved by matching the first shrinkage-resistant modified component with low molecular weight and the second shrinkage-resistant modified component with high molecular weight, and the defects that the brittleness is large and the adaptability deformation capability is weak after the curing of the marble adhesive are obviously improved by screening the toughening component. Due to the improvement of the two aspects, the toughened low-shrinkage marble adhesive not only has obviously improved comprehensive performance, but also further expands application scenes, and is expected to be used as a stone adhesive for bearing or assisting in bearing.
Drawings
FIG. 1 is a structural general formula of a first shrink resistant modifying component and a second shrink resistant modifying component.
Detailed Description
The invention is further illustrated by the following specific examples, which are intended to illustrate the problem and to explain the invention, without limiting it.
Preparation of first shrinkage-resistant modified component
Step 1.1: placing polyvinyl alcohol into a sealable reactor, and selecting a low molecular weight polyvinyl alcohol product with the following specification: viscosity is 5.2-6.0 Pa.s, alcoholysis degree is 98.0-99.0mol%; stirring and heating to 105 ℃, vacuumizing and dehydrating for 18min, and then cooling to 45 ℃;
step 1.2: adding toluene-2, 4-diisocyanate into the reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 10% of the dosage of the polyvinyl alcohol in the step 1.1, controlling the temperature to 72 ℃ under stirring for reacting for 75min, and reducing the temperature to 50 ℃;
step 1.3: adding hydroxyethyl methacrylate, wherein the dosage of toluene-2, 4-diisocyanate is 8% of the dosage of polyvinyl alcohol in the step 1.1, reacting for 75min under the stirring state at the temperature of 75 ℃, and cooling to room temperature to obtain the first anti-shrinkage modified component.
Preparation of a second shrink resistant modification component
Step 2.1: placing polyvinyl alcohol into a sealable reactor, and selecting a high molecular weight polyvinyl alcohol product with the following specification: viscosity is 54.0-66.0 Pa.s, alcoholysis degree is 98.0-99.0mol%; stirring and heating to 105 ℃, vacuumizing and dehydrating for 45min, and then cooling to 45 ℃;
step 2.2: adding toluene-2, 4-diisocyanate into the reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 9% of the dosage of the polyvinyl alcohol in the step 2.1, controlling the temperature to 72 ℃ under stirring for reacting for 75min, and reducing the temperature to 50 ℃;
step 2.3: adding hydroxyethyl methacrylate, wherein the dosage of toluene-2, 4-diisocyanate is 6% of the dosage of polyvinyl alcohol in the step 2.1, reacting for 75min under the stirring state at the temperature of 75 ℃, and cooling to room temperature to obtain a second anti-shrinkage modified component.
Example 1
A toughened low-shrinkage marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
100 parts of unsaturated polyester resin;
10 parts of a first shrinkage-resistant modifying component;
8 parts of a toughening agent;
60 parts of a first filler;
the component B comprises the following components in parts by weight:
100 parts of peroxide initiator;
30 parts of a second shrinkage-resistant modifying component;
60 parts of a blending agent;
and 100 parts of a second filler.
In the component A of the embodiment, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B of the embodiment, the blending agent is dimethyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Example 2
A toughened low-shrinkage marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
150 parts of unsaturated polyester resin;
6 parts of a first shrinkage-resistant modifying component;
5 parts of a toughening agent;
30 parts of a first filler;
the component B comprises the following components in parts by weight:
140 parts of peroxide initiator;
10 parts of a second shrinkage-resistant modifying component;
20 parts of a blending agent;
40 parts of a second filler.
In the component A of the embodiment, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B of the embodiment, the blending agent is dimethyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Example 3
A toughened low-shrinkage marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
8 parts of a first shrinkage-resistant modifying component;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
20 parts of a second shrinkage-resistant modifying component;
40 parts of a blending agent;
70 parts of a second filler.
In the component A of the embodiment, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B of the embodiment, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Example 4
A toughened low-shrinkage marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
115 parts of unsaturated polyester resin;
7 parts of a first shrinkage-resistant modifying component;
7 parts of a toughening agent;
50 parts of a first filler;
the component B comprises the following components in parts by weight:
110 parts of peroxide initiator;
16 parts of a second shrinkage-resistant modifying component;
35 parts of a blending agent;
55 parts of a second filler.
In the component A of the embodiment, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B of the embodiment, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Example 5
A toughened low-shrinkage marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
135 parts of unsaturated polyester resin;
9 parts of a first shrinkage-resistant modifying component;
7 parts of a toughening agent;
48 parts of a first filler;
the component B comprises the following components in parts by weight:
130 parts of peroxide initiator;
22 parts of a second shrinkage-resistant modifying component;
45 parts of a blending agent;
and 85 parts of a second filler.
In the component A of the embodiment, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B of the embodiment, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 1
This comparative example is different from example 3 in that neither the first shrinkage-resistant modifying component nor the second shrinkage-resistant modifying component is used, as follows.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 2
This comparative example is different from example 3 in that the first shrinkage-resistance modifying component is not used, as follows.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
20 parts of a second shrinkage-resistant modifying component;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 3
This control differs from example 3 in that no second shrink resistant modification component is used, in particular as follows.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
8 parts of a first shrinkage-resistant modifying component;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 4
This comparative example differs from example 3 in that the first shrink resistant modification component is replaced with a second shrink resistant modification component of equal mass, in the following manner.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
8 parts of a second shrinkage-resistant modifying component;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
20 parts of a second shrinkage-resistant modifying component;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 5
This comparative example differs from example 3 in that the second shrink resistant modification component is replaced with an equivalent mass of the first shrink resistant modification component, as follows.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
8 parts of a first shrinkage-resistant modifying component;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
20 parts of a first shrinkage-resistant modifying component;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 6
This comparative example differs from example 3 in that the first shrink resistant modification component in the a-component and the second shrink resistant modification component in the B-component are exchanged.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
20 parts of a second shrinkage-resistant modifying component;
6 parts of a toughening agent;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
8 parts of a first shrinkage-resistant modifying component;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the toughening agent is chlorinated paraffin; the first filler is fumed silica having a particle size in the range of 5-80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Comparative example 7
This control is different from example 3 in that no toughening agent is used, as follows.
A marble adhesive comprises a component A and a component B;
the component A comprises the following components in parts by weight:
130 parts of unsaturated polyester resin;
8 parts of a first shrinkage-resistant modifying component;
45 parts of a first filler;
the component B comprises the following components in parts by weight:
120 parts of peroxide initiator;
20 parts of a second shrinkage-resistant modifying component;
40 parts of a blending agent;
70 parts of a second filler.
In the component A, the first filler is fumed silica with the particle size ranging from 5 nm to 80 nm.
In the component B, the blending agent is dibutyl phthalate; the second filler is nano calcium carbonate with the particle size in the range of 5-80 nm; the peroxide initiator is benzoyl peroxide.
Performance testing
The materials of the component A and the component B in the adhesives of the examples and the comparative examples are respectively and uniformly mixed, and then the component A and the component B are mixed, so that the mass ratio of the peroxide initiator after mixing is 2.5%, and the unsaturated polyester resin involved in each case is m-benzene unsaturated polyester resin. Each sample was tested according to the building material industry standard JC/T989-2016 of the people's republic of China, and the flexural modulus of elasticity, impact toughness, and compression shear bond strength (standard) were measured as shown in table 1; in addition, the total volume shrinkage was measured according to ISO 3521-1997 determination of total volume shrinkage of unsaturated polyesters and epoxy resins, and is shown in Table 1.
TABLE 1 Performance test results
As can be seen from the results of table 1, the properties of the adhesives of the embodiments of the present invention are all significantly due to the industry standard, and the first shrinkage-resistant modified component and the second shrinkage-resistant modified component prepared according to the present invention have significant effects on inhibiting shrinkage of the adhesive in the curing stage and improving adhesive properties, the first shrinkage-resistant modified component needs to be premixed in the a component, the second shrinkage-resistant modified component needs to be premixed in the B component, and the manner of adding or replacing the first shrinkage-resistant modified component and the second shrinkage-resistant modified component with each other is changed, which shows properties substantially equivalent to those of not adding the shrinkage-resistant modified component. In addition, the toughening agent chlorinated paraffin used in the invention has very important functions of improving toughness and improving bonding performance.
The above embodiments are illustrative for the purpose of illustrating the technical concept and features of the present invention so that those skilled in the art can understand the content of the present invention and implement it accordingly, and thus do not limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (8)
1. The utility model provides a toughened low shrinkage marble adhesive which characterized in that: comprises a component A and a component B;
the component A comprises the following components in parts by weight:
100-150 parts of unsaturated polyester resin;
6-10 parts of a first shrinkage-resistant modifying component;
5-8 parts of a toughening agent;
30-60 parts of a first filler;
the component B comprises the following components in parts by weight:
100-140 parts of peroxide initiator;
10-30 parts of a second shrinkage-resistant modified component;
20-60 parts of a blending agent;
40-100 parts of a second filler;
the first shrinkage-resistant modified component is a component shown in a formula I with low molecular weight, and an X segment of the first shrinkage-resistant modified component is polymerized by polyvinyl alcohol with low molecular weight;
the second shrinkage-resistant modified component is a component shown in a formula I with high molecular weight, and an X segment of the second shrinkage-resistant modified component is obtained by polymerizing high molecular weight polyvinyl alcohol;
the polyvinyl alcohol used for polymerizing the X segment in the first shrinkage-resistant modified component has a viscosity in the range of 5.2-6.0mPa.s and an alcoholysis degree in the range of 98.0-99.0mol%;
the polyvinyl alcohol used for polymerizing the X segment in the second anti-shrinkage modified component has a viscosity in the range of 54.0-66.0mPa.s and an alcoholysis degree in the range of 98.0-99.0 mol%.
2. The toughened low shrinkage marble glue of claim 1, wherein: in the component A, the toughening agent is chlorinated paraffin.
3. The toughened low shrinkage marble glue of claim 1, wherein: in the component B, the blending agent is dimethyl phthalate and/or dibutyl phthalate.
4. The toughened low shrinkage marble glue of claim 1, wherein: the first shrinkage-resistant modified component is prepared by the following method:
step 1.1: placing polyvinyl alcohol in a sealable reactor, stirring and heating to 102-105 ℃, vacuumizing and dehydrating for 15-20min, and then cooling to 45-50 ℃;
step 1.2: adding toluene-2, 4-diisocyanate into a reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 9-12% of the dosage of the polyvinyl alcohol in the step 1.1, controlling the temperature to 70-75 ℃ under stirring for reacting for 60-90min, and reducing the temperature to 45-50 ℃;
step 1.3: adding hydroxyethyl methacrylate into the reactor, wherein the dosage of toluene-2, 4-diisocyanate is 6-10% of the dosage of polyvinyl alcohol in the step 1.1, reacting for 60-90min under the condition of stirring at the temperature of 75-80 ℃, and cooling to room temperature to obtain the first anti-shrinkage modified component.
5. The toughened low shrinkage marble glue of claim 1, wherein: the second shrinkage-resistant modified component is prepared by the following method:
step 2.1: placing polyvinyl alcohol in a sealable reactor, stirring and heating to 102-105 ℃, vacuumizing and dehydrating for 40-55min, and then cooling to 45-50 ℃;
step 2.2: adding toluene-2, 4-diisocyanate into a reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 8-11% of the dosage of the polyvinyl alcohol in the step 2.1, controlling the temperature to 70-75 ℃ under stirring for reacting for 60-90min, and reducing the temperature to 45-50 ℃;
step 2.3: adding hydroxyethyl methacrylate into the reactor, wherein the dosage of the toluene-2, 4-diisocyanate is 5-9% of the dosage of the polyvinyl alcohol in the step 2.1, reacting for 60-90min under the condition of stirring at the temperature of 75-80 ℃, and cooling to room temperature to obtain the second anti-shrinkage modified component.
6. The toughened low shrinkage marble adhesive of claim 4, wherein: in the step 1.1, stirring and heating to 105 ℃, and vacuumizing and dehydrating for 18min.
7. The toughened low shrinkage marble glue of claim 5, wherein: in the step 2.1, stirring and heating to 105 ℃, and vacuumizing and dehydrating for 45min.
8. The toughened low shrinkage marble glue of claim 1, wherein: the first filler is fumed silica; the second filler is nano calcium carbonate.
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| CN202211464944.5A CN115746772B (en) | 2022-11-22 | 2022-11-22 | Toughened low-shrinkage marble adhesive |
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| CN115746772A (en) | 2023-03-07 |
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