CN113563771A - Anti-cracking sound-insulation composite material and preparation method thereof - Google Patents
Anti-cracking sound-insulation composite material and preparation method thereof Download PDFInfo
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- CN113563771A CN113563771A CN202110948633.5A CN202110948633A CN113563771A CN 113563771 A CN113563771 A CN 113563771A CN 202110948633 A CN202110948633 A CN 202110948633A CN 113563771 A CN113563771 A CN 113563771A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D131/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Coating compositions based on derivatives of such polymers
- C09D131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09D131/04—Homopolymers or copolymers of vinyl acetate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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Abstract
The invention discloses a cracking-prevention sound-insulation composite material and a preparation method thereof, wherein the cracking-prevention sound-insulation composite material comprises the following raw materials in parts by weight: 5-20% of hollow glass beads and 0.2-0.5% of modified polycarboxylic acid water reducing agent; the vacuum degree of the hollow glass beads is 0.2g/cm3The particle size is 80 mu m; the modified polycarboxylate superplasticizer is prepared by reacting a polycarboxylate superplasticizer and a silane coupling agent with amino at the tail end in a weight ratio of 1: 2-5 under the action of organic weak base; modifying a polycarboxylate water reducing agent by using a silane coupling agent, and forming the polycarboxylate water reducing agent, the silane coupling agent and hollow glass beadsThe organic matrix-silane coupling agent-inorganic matrix bonding layer enhances the interaction force between the polycarboxylate superplasticizer and the hollow glass beads, the silane coupling agent has reactivity to the building substrate, the bonding force between the anti-cracking sound-insulation composite material and the building substrate is enhanced, and the prepared anti-cracking sound-insulation composite material has excellent sound insulation and heat insulation properties, strong bonding force, ultraviolet resistance, difficulty in cracking and falling and the like.
Description
Technical Field
The invention belongs to the field of buildings, and particularly relates to a cracking-prevention sound-insulation composite material and a preparation method thereof.
Background
With the development of society, industrial factories, entertainment places and vehicles are increased, noise pollution is more and more serious, and troubles are brought to work, study and life of people, so that the problem that how to reduce the influence of noise on the life of people is needed to be solved urgently is solved. In the prior art, the sound insulation material is generally prepared from the vitrified micro bubbles, but the vitrified micro bubbles have a general sound absorption effect, poor heat insulation performance and poor adhesive force, are easy to peel off after being washed by rainwater, are not ultraviolet-proof and are easy to yellow.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a cracking-prevention sound-insulation composite material, wherein a polycarboxylate water reducing agent is modified by a silane coupling agent, the polycarboxylate water reducing agent, the silane coupling agent and hollow glass beads form an organic matrix-silane coupling agent-inorganic matrix binding layer, the interaction force between the polycarboxylate water reducing agent and the hollow glass beads is enhanced, the silane coupling agent has reactivity to a building substrate, the binding force between the cracking-prevention sound-insulation composite material and the building substrate is enhanced, and the prepared cracking-prevention sound-insulation composite material has excellent sound insulation, heat insulation, strong binding force, ultraviolet resistance, difficulty in cracking and falling and the like.
The invention aims to provide a cracking-prevention sound-insulation composite material which comprises the following raw materials in parts by weight:
5-20% of hollow glass beads;
0.2 to 0.5 percent of modified polycarboxylic acid water reducing agent;
the vacuum degree of the hollow glass beads is 0.2g/cm3The particle size is 80 mu m;
the modified polycarboxylate superplasticizer is prepared by reacting a polycarboxylate superplasticizer and a silane coupling agent with amino at the tail end in a weight ratio of 1: 2-5 under the action of organic weak base.
Further, the anti-cracking sound-insulation composite material also comprises the following raw materials in parts by weight:
preferably, the polycarboxylate superplasticizer is an acrylic copolymer with polyether grafted on side chains.
Preferably, the silane coupling agent containing amino at the terminal is one or more of gamma-aminopropyltrimethoxysilane, gamma-aminopropyltriethoxysilane, gamma-aminopropylmethyldiethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltrimethoxysilane, N-beta (aminoethyl) -gamma-aminopropyltriethoxysilane, N-beta (aminoethyl) -gamma-aminopropylmethyldiethoxysilane and aminoethylaminopropyltrimethoxysilane.
Further, the acrylic copolymer of the side-chain graft polyether has a number average molecular weight of 10000-30000 and PDI of 2.5 to 4.0.
Further, the organic weak base is one or more of triethylamine, pyridine, DIPEA and DABCO.
Further, the preparation method of the modified polycarboxylate superplasticizer comprises the following steps:
s1, mixing a polycarboxylate superplasticizer and a first solvent, stirring, and dropwise adding SOCl2Heating, refluxing and post-treating to obtain a solid, and adding a second solvent for dissolving;
s2, mixing the silane coupling agent with the amino at the tail end and a second solvent, heating, adding organic weak base, stirring in an inert gas atmosphere, dropwise adding the solid dissolved in the second solvent in the step S1, heating, stirring, and performing post-treatment to obtain the modified polycarboxylic acid water reducing agent.
Further, in step S1, the polycarboxylate superplasticizer is mixed with SOCl2The weight ratio of (A) to (B) is 1: 1.2-2.
Further, in step S1, the first solvent is one of anhydrous tetrahydrofuran, anhydrous chloroform, and anhydrous carbon tetrachloride.
Further, in step S1, the heating temperature is 60 to 80 ℃.
Further, in step S1, the post-treatment is distillation under reduced pressure.
Further, in step S2, the second solvent is one of toluene and benzene.
Further, in step S2, the heating temperature is 78 to 110 ℃.
Further, in step S2, the inert gas is one of nitrogen and argon.
Further, in step S2, the post-treatment is methanol precipitation, which is dried to constant weight under vacuum at 45 ℃ after twice cycles of dissolution/precipitation with a toluene/methanol mixed solvent.
The invention also aims to provide a preparation method of the anti-cracking sound-insulation composite material, which comprises the following steps:
s1, blending and ultrasonically treating a modified polycarboxylate superplasticizer, hollow glass beads and part of deionized water, adjusting the pH value to be alkaline, heating and stirring, and performing post-treatment to obtain a material for later use;
s2, adding the vinyl acetate-ethylene copolymer emulsion and the coarse whiting powder into a stirrer, stirring at a high speed, then regulating the rotating speed to be low, adding the product prepared in the step S1, stirring for a period of time, regulating the rotating speed to be low, and stirring to obtain a material for later use;
s3, adding the rest deionized water into a stirring tank, stirring, adding calcium silicate powder, an anti-settling suspending agent, a defoaming agent, silica fume and gypsum powder, stirring at a high speed, sampling, measuring the temperature, adding wood fiber and a retarder, and stirring to obtain a material for later use;
s4, when in use, the materials obtained in the steps S2 and S3 are mixed with water and stirred to obtain the slurry-shaped anti-cracking sound-insulation composite material.
Further, in step S1, the addition temperature is 40-60 ℃.
Further, in step S1, the pH adjustment to alkalinity is to adjust the pH to 9-11 by adding sodium hydroxide.
Further, in step S1, the post-treatment is trichloroacetic acid/deionized water cleaning.
Further, in step S2, the stirring speed of the high-speed stirring is 1000-1500 rpm.
Further, in step S2, the rotation speed of the agitator is adjusted to 300 rpm; the speed was then reduced to 150 rpm.
Further, in step S4, the weight ratio of the material obtained in step S2 to the material obtained in step S3 to water is 7:25: 1.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the polycarboxylate water reducing agent is modified by the silane coupling agent, the polycarboxylate water reducing agent, the silane coupling agent and the hollow glass beads form a bonding layer of an organic matrix, the silane coupling agent and an inorganic matrix, the interaction force between the polycarboxylate water reducing agent and the hollow glass beads is enhanced, the silane coupling agent has reactivity on a building substrate, the bonding force between the anti-cracking sound-insulation composite material and the building substrate is enhanced, and the dispersibility between the hollow glass beads and organic matters is enhanced; the sound insulation, heat insulation, adhesive force, ultraviolet resistance, difficult cracking and falling and other performances of the composite material are improved.
(2) The molecular chain of the polycarboxylate superplasticizer in the cracking-resistant sound-insulation composite material prepared by the invention contains branched chains and ester groups, and the ester bonds in the molecular chain are hydrolyzed in the alkaline medium of cement, so that the low-molecular-weight carboxylate copolymer with a dispersing effect and the silane coupling agent modified carboxylate copolymer are released, the dispersing effect of each particle of the composite material is improved, and the main chain of the polycarboxylate superplasticizer molecule can be firmly adsorbed on the surface of inorganic particles and the silane coupling agent has binding force to a building substrate, so that the composite material has better cracking resistance.
(3) The prepared anti-cracking sound-insulation composite material is coated on a roof, so that the roof can form an anti-cracking sound-insulation layer, and the coating can be prepared by mixing the anti-cracking sound-insulation layer with other substances.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples 1-3 and comparative examples 1-3: and (3) preparing the anti-cracking sound-insulation composite material.
(1) Examples 1-3 and comparative examples 1-3 compositions of crack resistant acoustical composites.
TABLE 1 parts by weight composition of the crack prevention acoustic composite of examples 1-3 and comparative examples 1-3.
(2) Examples 1-3 preparation of modified polycarboxylic acid water reducing agent.
S1, adding 10 parts by weight of polycarboxylic acid water reducing agent and 30mL of anhydrous tetrahydrofuran into a dry branch mouth bottle provided with a reflux condenser tube, stirring, and dropwise adding SOCl215 parts by weight, heating and refluxing at 66 ℃, distilling under reduced pressure to obtain a solid, and adding anhydrous toluene to dissolve the solid;
s2, adding gamma-aminopropyl trimethoxy silane and anhydrous toluene into a dry branch-mouth bottle provided with a reflux condenser tube, heating at 75 ℃, adding pyridine, stirring in a nitrogen atmosphere, dropwise adding the solid dissolved in the anhydrous toluene in the step S1, heating at 85 ℃, stirring, precipitating the product by methanol, circulating the solution/precipitation twice by a toluene/methanol mixed solvent, and drying at 45 ℃ in vacuum to constant weight to obtain the modified polycarboxylic acid water reducer.
(3) Examples 1-3 preparation of crack resistant acoustical composites.
S1, blending a modified polycarboxylate superplasticizer, hollow glass beads and part of deionized water for 10 minutes according to parts by weight, dropwise adding a sodium hydroxide solution to adjust the pH value to 10, heating and stirring at 50 ℃, continuously cleaning trichloroacetic acid/deionized water until the pH value of the solution is about 7, and obtaining a material for later use;
s2, adding the vinyl acetate-ethylene copolymer emulsion and the heavy calcium powder into a stirrer according to the parts by weight, stirring at a high speed of 1000 r/min for 10 minutes, then reducing the rotating speed to 300 r/min, adding the product prepared in the step S1, stirring for 10 minutes, reducing the rotating speed to 150 r/min, and stirring for 5 minutes to obtain a material for later use;
s3, adding the rest deionized water into a stirring tank according to the weight parts, stirring at a high speed of 1000 revolutions per minute for 2 minutes, adding calcium silicate powder, an anti-settling suspending agent, a defoaming agent, silica fume and gypsum powder, stirring at a high speed of 1200 revolutions per minute for 30 minutes, sampling, measuring the temperature, adding wood fiber and a retarder when the temperature is lower than 35 ℃, and stirring at 1000 revolutions per minute for 5 minutes to obtain a material for later use;
s4, when in use, the material prepared in the step S2, the material prepared in the step S3 and water are mixed according to the weight ratio of 1:3:1, and the mixture is stirred for 10 minutes at 300 revolutions per minute to obtain the slurry-shaped anti-cracking sound-insulation composite material.
Comparative example 1
The hollow glass microspheres of example 2 were replaced with vitrified microspheres and the remaining steps were unchanged.
Comparative example 2
The modified polycarboxylate superplasticizer of example 2 was substituted for the polycarboxylate superplasticizer, and the remaining steps were unchanged.
Comparative example 3
The hollow glass beads in the embodiment 2 are replaced by vitrified beads, and the modified polycarboxylate superplasticizer is replaced by polycarboxylate superplasticizer, and the rest steps are unchanged.
And (3) performance testing:
the cracking-prevention sound-insulation composite materials prepared in the examples 1-3 and the materials prepared in the comparative examples 1-3 are respectively prepared into dry coating films with the thickness of 2mm in a blade coating mode, the dry coating films are coated on a cement mortar block, a peeling and bonding performance test is carried out according to JG/T375-2012, a water resistance performance test is carried out according to GB/T1733 + 1993, a heat conductivity performance test is carried out by using a heat conductivity tester HS-DR-5, and the test results are shown in Table 2.
TABLE 2 Performance test results for the crack resistant acoustical composites prepared in examples 1-3 and comparative examples 1-3.
As can be seen from Table 2, the anti-cracking sound-insulating composite materials prepared in examples 1 to 3 have excellent properties of sound insulation, heat insulation, strong adhesion, difficulty in cracking and falling, ultraviolet resistance and the like.
Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes and modifications can be made therein without departing from the scope of the invention as defined by the appended claims.
Claims (10)
1. The anti-cracking sound-insulation composite material is characterized by comprising the following raw materials in parts by weight:
5-20% of hollow glass beads;
0.2 to 0.5 percent of modified polycarboxylic acid water reducing agent;
the vacuum degree of the hollow glass beads is 0.2g/cm3The particle size is 80 mu m;
the modified polycarboxylate superplasticizer is prepared by reacting a polycarboxylate superplasticizer and a silane coupling agent with amino at the tail end in a weight ratio of 1: 2-5 under the action of organic weak base.
2. The crack-resistant sound-insulating composite material as claimed in claim 1, further comprising the following raw materials in parts by weight:
5-10% of calcium silicate powder;
0.1 to 0.5 percent of anti-settling suspending agent;
0.1 to 0.2 percent of retarder;
0.1 to 0.2 percent of defoaming agent;
0.2-1% of wood fiber;
1-5% of silica fume;
1-10% of gypsum powder;
40-50% of vinyl acetate-ethylene copolymer emulsion;
1-5% of heavy calcium powder;
15-25% of deionized water.
3. The crack-resistant sound-insulating composite material as claimed in claim 1, wherein the polycarboxylate superplasticizer is an acrylic copolymer with polyether grafted on side chains.
4. The crack-resistant acoustic composite material according to claim 1, wherein the amino-terminated silane coupling agent is one or more of γ -aminopropyltrimethoxysilane, γ -aminopropyltriethoxysilane, γ -aminopropylmethyldiethoxysilane, N- β (aminoethyl) - γ -aminopropyltrimethoxysilane, N- β (aminoethyl) - γ -aminopropyltriethoxysilane, N- β (aminoethyl) - γ -aminopropylmethyldiethoxysilane, and aminoethylaminopropyltrimethoxysilane.
5. The crack-resistant acoustical composite of claim 3 wherein the acrylic copolymer of the side-chain grafted polyether has a number average molecular weight of 10000-30000 and PDI of 2.5-4.0.
6. The crack-resistant sound-insulating composite material as claimed in claim 1, wherein the organic weak base is one or more of triethylamine, pyridine, DIPEA and DABCO.
7. The anti-cracking sound-insulation composite material as claimed in claim 1, wherein the preparation method of the modified polycarboxylic acid water reducer comprises the following steps:
s1, mixing a polycarboxylate superplasticizer and a first solvent, stirring, and dropwise adding SOCl2Heating, refluxing and post-treating to obtain a solid, and adding a second solvent for dissolving;
s2, mixing the silane coupling agent with the amino at the tail end and a second solvent, heating, adding organic weak base, stirring in an inert gas atmosphere, dropwise adding the solid dissolved in the second solvent in the step S1, heating, stirring, and performing post-treatment to obtain the modified polycarboxylic acid water reducing agent.
8. The crack-resistant acoustical composite of claim 7 wherein in step S1, the polycarboxylate water reducer is blended with SOCl2The weight ratio of (A) to (B) is 1: 1.2-2.
9. The crack-resistant sound-insulating composite material as claimed in claim 7, wherein in step S2, the post-treatment is methanol precipitation, and after two cycles of dissolution/precipitation with a mixed solvent of toluene and methanol, the material is dried at 45 ℃ in vacuum to constant weight.
10. The preparation method of the anti-cracking sound-insulation composite material is characterized by comprising the following steps of:
s1, blending and ultrasonically treating a modified polycarboxylate superplasticizer, hollow glass beads and part of deionized water, adjusting the pH value to be alkaline, heating and stirring, and performing post-treatment to obtain a material for later use;
s2, adding the vinyl acetate-ethylene copolymer emulsion and the coarse whiting powder into a stirrer, stirring at a high speed, then regulating the rotating speed to be low, adding the product prepared in the step S1, stirring for a period of time, regulating the rotating speed to be low, and stirring to obtain a material for later use;
s3, adding the rest deionized water into a stirring tank, stirring, adding calcium silicate powder, an anti-settling suspending agent, a defoaming agent, silica fume and gypsum powder, stirring at a high speed, sampling, measuring the temperature, adding wood fiber and a retarder, and stirring to obtain a material for later use;
s4, when in use, the materials obtained in the step S2 and the step S3 and water are mixed and stirred according to the weight ratio of 7:25:1 to obtain the slurry-shaped anti-cracking sound-insulation composite material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114149662A (en) * | 2021-12-03 | 2022-03-08 | 李存森 | Building energy-saving sound-insulation material and preparation method and application thereof |
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2021
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| JP2000264754A (en) * | 1999-03-19 | 2000-09-26 | Spacer Kogyo:Kk | Production of fine particulate balloon-containing lightweight high strength concrete |
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| CN114149662A (en) * | 2021-12-03 | 2022-03-08 | 李存森 | Building energy-saving sound-insulation material and preparation method and application thereof |
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