CN109439080B - Damping composition containing hydrophilic dispersion type PVC resin and preparation method thereof - Google Patents
Damping composition containing hydrophilic dispersion type PVC resin and preparation method thereof Download PDFInfo
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- 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
- C09D127/00—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 a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/04—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 a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C09D127/06—Homopolymers or copolymers of vinyl chloride
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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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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention discloses a damping composition containing hydrophilic dispersion type PVC resin, which comprises the following components: hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler, plasticizer and lubricant; a stabilizer. The damping composition of the invention takes loose spherical PVC resin as a matrix, and utilizes hydrophilic dispersion type PVC resin to make the coating water-borne. The damping composition disclosed by the invention is low in VOC type, and has the advantages of environmental friendliness, capability of mechanical spraying, better mechanical property, damping property and other properties and the like.
Description
Technical Field
The invention relates to a damping material special for automobiles, in particular to a damping composition containing hydrophilic dispersion type PVC resin and a preparation method thereof, which are widely applied to the fields of automobile manufacturing, ship manufacturing, aerospace, mechanical equipment and the like.
Background
The vibration and noise generated by the operation of the machine not only pollute the environment, but also affect the machining precision and the product quality of the machine, accelerate the fatigue damage of the mechanical structure and shorten the service life of the machine. The damping material taking PVC as the base material is a novel viscoelastic damping material capable of reducing noise and damping, can be better coated at a plurality of construction dead corners due to the characteristic of spraying, and has wider application field and application prospect.
The existing solvent-based damping paint is mainly prepared by adding specific fillers into coal tar pitch, polyurethane and the like, and the damping composition materials contain a large amount of VOC, so that the environmental pollution is serious. The existing water-based damping composition material is mainly prepared by adding specific fillers into acrylic acid, epoxy resin and the like, and the damping composition material has the advantages of long drying time, difficulty in thick coating, difficulty in meeting the requirement of automatic coating, lower damping factor and poorer performance. The PVC coating has the advantages of good stability, high damping performance, high mechanical strength, low material density, mechanical spraying and the like, but the traditional PVC material contains a large amount of organic solvent, is not in accordance with the concept of green environmental protection, is oil-soluble and is difficult to clean after mechanical construction.
The Chinese patent with the patent name of 'a PVC coating', and the patent publication number of CN107604750A, discloses a PVC coating and a preparation method thereof, and the PVC coating comprises the following components in percentage by mass: 10-30 parts of resin, 15-35 parts of calcium carbonate, 3-8 parts of viscosity reducer, 0.6-2.1 parts of stabilizer, 0.5-2.0 parts of foaming agent, 0.2-6 parts of titanium dioxide, 6-21 parts of plasticizer, 15-35 parts of phosphorus pentoxide, 15-10 parts of liquid organic glass and 2-1 parts of pigment color paste. The product is used for wallpaper full-covering spraying paint, and has good spraying effect, bright color and good flame retardant effect. The PVC coating prepared by the patent can only be used for beautifying the appearance, has poor damping performance, mechanical strength and other performances, cannot be used as a damping coating, contains organic solvents such as liquid organic glass and the like, has a large amount of VOC (volatile organic compounds) emission, and does not accord with the green environmental protection concept.
The patent is UV-LED light source cured PVC coating and a preparation method thereof, and the Chinese patent with the patent publication number of CN106752865A discloses a UV-LED light source cured PVC coating and a preparation method thereof. The components and mass ratio are as follows: 40-60 parts of urethane acrylate, 5-15 parts of modified acrylate oligomer, 5-10 parts of hyperbranched acrylate oligomer, 30-40 parts of acrylate reactive diluent, 3-7 parts of photoinitiator, 0.2-0.4 part of auxiliary agent and 0-20 parts of pigment and filler. The patent introduces a preparation method of a coating which uses various polyacrylates and oligomers thereof as matrixes through a UV-LED photocuring technology, and the coating is used as a PVC surface coating and has the advantages of high curing speed, good adhesion on PVC, good hardness and the like. However, the coating is an acrylic-based coating, has low solid content, is difficult to realize thick coating, has poor damping performance and mechanical strength performance, can only be used as a surface coating, and cannot be used as a damping material.
The Chinese patent with the patent publication number of CN106833159A, named as a colored PVC coating, discloses a colored PVC coating and a preparation method thereof. The components and mass ratio are as follows: 400-450 parts of environment-friendly plasticizer, 300-350 parts of PVC paste resin, 20-30 parts of liquid stabilizer, 600-800 parts of cyclohexanone, 30-40 parts of mixed solvent and 20-30 parts of pigment color paste. The patent introduces a method of fully and uniformly mixing liquid phase solution, solid component resin, filler and various auxiliary agents to obtain a colored PVC coating which meets the building coating standard. The coating has the advantages of rich color, low price and the like, but the coating has low solid content and poor mechanical property and damping property because the addition amount of the plasticizer, cyclohexanone and other solvents is too large, and the coating cannot be used as a damping material. And the components contain a large amount of organic solvents such as cyclohexanone and xylene, so that the VOC emission is large, and the green environmental protection concept is not met.
The patent is 'a foaming type vehicle bottom stone-impact-resistant coating', and the patent publication number is CN 103483940A. The components and mass ratio are as follows: 20-35 parts of PVC copolymer resin, 20-35 parts of filler, 25-35 parts of plasticizer, 1-15 parts of tackifier, 3-5 parts of moisture absorbent, 1-5 parts of stabilizer and 1-5 parts of foaming agent. The car bottom stone impact resistant coating with small specific gravity is obtained by a PVC foaming technology. In the patent, only through mechanical blending, a foaming agent is difficult to disperse uniformly in the coating, the foaming uniformity of the material is poor, and local foaming is extremely easy to generate too high or too low. And the foaming material has poor mechanical strength, the coating is oil-soluble, and the cleaning is difficult to carry out after the construction.
Therefore, the existing coating taking the PVC resin as the base material possibly contains a large amount of organic solvent, so that the environment is polluted, and the adverse effect on the body health of operators is easily generated; on the other hand, other components, such as acrylic group and the like, are often added into the existing PVC coating, so that the mechanical property and the damping property of the material are poor, and the material cannot be used as a damping material. In addition, the coating taking PVC resin as a base material is generally oil-soluble, and is difficult to clean after mechanized construction.
Disclosure of Invention
Therefore, it is required to provide a damping composition containing a hydrophilic dispersion type PVC resin, which is prepared by using a loose spherical PVC resin as a matrix and making a coating material aqueous using the hydrophilic dispersion type PVC resin, and a method for preparing the same. The damping composition disclosed by the invention is low in VOC type, and has the advantages of environmental friendliness, capability of mechanical spraying, better mechanical property, damping property and other properties and the like.
In order to achieve the above object, the inventors provide a damping composition containing a hydrophilic dispersion type PVC resin, which comprises the following components in parts by weight:
preferably, the hydrophilic dispersion type PVC resin is obtained by copolymerizing sodium polyvinylbenzene sulfonate, polyacrylate and polyvinyl chloride, and the structural formula of the hydrophilic dispersion type PVC resin is shown as a formula I:
in the formula I, R is n-butyl, n-hexyl or n-octyl; x is a positive integer of 10 to 100, y is a positive integer of 10 to 200, and z is a positive integer of 200 to 800.
The hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonate, polyacrylate and polyvinyl chloride. The polyacrylate has excellent damping performance, has good internal plasticization performance on polyvinyl chloride, and can improve the aging resistance, cold resistance and lasting flexibility of the polyvinyl chloride. The polyvinyl benzene sulfonic acid sodium contains hydrophilic group sulfonic acid group and hydrophilic oil group conglobation vinyl group, and the coating can be changed into a hydrophilic dispersion type due to the characteristic, so that the storage, transportation, construction and spraying are convenient, and the low VOC type water-soluble green environment-friendly coating is realized. The polyvinyl benzene sulfonic acid sodium contains benzene ring, the steric hindrance effect is large, the molecular chain is easy to be tangled, and large internal friction force can be generated when external force is applied to achieve the damping effect.
Preferably, the loose spherical PVC resin is a homopolymer prepared from vinyl chloride by an emulsion method, and the polymerization degree is 500-2000. The loose spherical PVC resin added in the invention has good weather resistance, chemical resistance, higher mechanical strength, good damping performance, low price and wide source. PVC molecules have strong polar side group C-Cl bonds, and can generate large internal friction when stressed to achieve the damping effect. Meanwhile, the PVC added in the invention is used as a coating base material, so that the mechanical strength of the product is ensured.
Preferably, the filler is one or a mixture of two or more of the following: calcium carbonate, titanium dioxide, mica powder, talcum powder, kaolin, alumina powder, carbon black, quartz powder or white carbon black.
More preferably, the filler is one or a combination of two or more of the following: calcium carbonate, mica powder and white carbon black. The added filler can improve the toughness of the product and reduce the cost. The filler can be dispersed in the continuous resin phase as a dispersed phase, so that the polarity of PVC molecules is reduced, and the toughness of the product is increased. Meanwhile, heat dissipation is generated through the friction between the filler particles and the PVC macromolecular chain segment, so that the damping performance is improved.
Preferably, the plasticizer is one or a mixture of two or more of the following: phthalates, dioctyl isophthalate, dioctyl terephthalate; the structural formula of the phthalate ester is shown as a formula II:
in the formula II, R is ethyl, n-butyl, isobutyl, n-octyl, isooctyl or isononyl.
More preferably, the plasticizer is one or a combination of two or more of the following: dioctyl phthalate, dioctyl isophthalate or dioctyl terephthalate. The plasticizer added in the invention is mainly used for improving the film forming property and the elongation at break of the PVC, and the plasticizer is added to reduce the polarity of PVC molecules, reduce the intermolecular force and increase the flexibility of the product.
Preferably, the lubricant is one or a mixture of two or more of the following: liquid paraffin, naphthenic oil, hydrogenated castor oil, epoxidized soybean oil, butyl stearate, calcium stearate, zinc stearate, barium stearate or lanolin.
More preferably, the lubricant is one or a mixture of two or more of the following: liquid paraffin, naphthenic oil or lanolin. The lubricant added in the invention can reduce the viscosity of the coating, improve the film forming property of PVC and reduce the plasticizing temperature.
Preferably, the stabilizer is one or a mixture of two or more of the following: calcium zinc stabilizer, lead salt composite stabilizer, organic tin stabilizer, liquid composite stabilizer, barium zinc stabilizer and potassium zinc stabilizer. More preferably, the stabilizer is a calcium zinc stabilizer. The PVC coating can be decomposed to generate HCl in the high-temperature forming process, so that the product is yellowed, and the performances of all aspects are reduced. Therefore, the stabilizer is added in the invention to avoid the decomposition reaction of the coating in high-temperature plasticizing molding.
The invention also provides a preparation method of the damping composition containing the hydrophilic dispersion type PVC resin, which comprises the following steps:
1) at normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3-5 minutes;
2) at normal temperature, sequentially adding the plasticizer and the lubricant in parts by weight into the high-speed dispersion machine in the step 1) for dispersion until uniform pasty coating is obtained, vacuumizing and stirring for 4-10 minutes, and standing and curing for 18-32 hours.
3) Taking out the coating prepared in the step 2), spraying the coating on an electrophoresis plate, and plasticizing at the temperature of 120-160 ℃ for 25-40 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
The hydrophilic dispersion type PVC damping composition with high solid content, low VOC and environmental protection is obtained by selecting polyvinyl benzene sulfonate and polyacrylate modified hydrophilic dispersion type PVC resin, compounding loose spherical PVC resin with the polymerization degree of 500-2000, uniformly dispersing the loose spherical PVC resin in a plasticizer, further selecting proper filler to uniformly disperse the loose spherical PVC resin in a resin system, adding a lubricant to adjust the viscosity of the coating, and adding a stabilizer to ensure that the coating does not generate decomposition reaction in the plasticizing process.
The prepared damping composition is subjected to a PVC spray forming process to obtain the hydrophilic dispersion type PVC-containing damping composition material with excellent performance. According to the damping composition material containing the hydrophilic dispersion type PVC, due to the addition of the hydrophilic dispersion type PVC resin, the coating is changed into water-based, the internal friction force generated by molecular vibration of the coating is increased, and the damping composition material has good damping performance; the coating is shear thinning type pseudoplastic fluid, shows low viscosity under high shear and is sprayed, shows high viscosity under low shear, avoids slipping and sagging, and has good constructability; the filler is dispersed in the resin phase as a disperse phase, so that the molecular polarity is reduced, the flexibility is increased, and the elongation at break of the product is high.
The invention has the beneficial effects that: 1. the method comprises the following steps of (1) designing a formula and a product structure: loose spherical PVC resin is used as a matrix, and hydrophilic dispersion PVC resin is introduced, so that the damping performance and the mechanical strength of the coating are improved, and the coating is water-based. By regulating and controlling the addition amount of the filler and the plasticizer, the density and viscosity of the damping composition can be accurately controlled according to requirements, and meanwhile, the toughness of the damping composition can be controlled and improved. 2. From the aspect of workability: the rheological characteristics of the damping composition coating under different shear rates are utilized to realize mechanical automatic spraying, sag resistance and slip resistance. 3. From the aspect of process cost: the addition amount of the filler is large, the raw material cost is low, and the production efficiency is high. 4. From the aspect of product performance: high damping factor, high tensile strength and high elongation at break. 5. And (3) environment-friendly aspect: has the characteristics of low VOC, water solubility, no pollution and green chemistry.
Drawings
FIG. 1 is a graph of viscosity values of damping composition coatings prepared according to examples 1-10 of the present invention;
FIG. 2 is a graph of the loss factor of damping composition coatings prepared in examples 1-10 of the present invention.
Detailed Description
To explain technical contents, structural features, and objects and effects of the technical solutions in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
The invention discloses a damping composition containing hydrophilic dispersion type PVC resin, which comprises the following components in parts by weight:
the invention also discloses a preparation method of the damping composition containing the hydrophilic dispersion type PVC resin, which comprises the following steps:
1) at normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3-5 minutes;
2) at normal temperature, sequentially adding the plasticizer and the lubricant in parts by weight into the high-speed dispersion machine in the step 1) for dispersion until uniform pasty coating is obtained, vacuumizing and stirring for 4-10 minutes, and standing and curing for 18-32 hours.
3) Taking out the coating prepared in the step 2), spraying the coating on an electrophoresis plate, and plasticizing at the temperature of 120-160 ℃ for 25-40 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 1
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, polybutyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 500, the filler is calcium carbonate, the plasticizer is dioctyl phthalate, the lubricant is liquid paraffin, and the stabilizer is a calcium-zinc stabilizer, specifically, the loose spherical PVC resin is prepared by mixing calcium ricinoleate and zinc laurate in a mass ratio of 1: 1.
2) At normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 5 minutes and placed for curing for 24 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing for 30 minutes at 140 ℃ to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 2
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium salt, poly hexyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 1250, the filler is mica powder, the plasticizer is dioctyl terephthalate, the lubricant is naphthenic oil, and the stabilizer is a lead salt composite stabilizer, in particular lead stearate.
2) At normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 10 minutes and placed for curing for 24 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing at 140 ℃ for 25 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 3
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, poly octyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 2000, the filler is white carbon black, the plasticizer is dioctyl isophthalate, the lubricant is lanolin, and the stabilizer is an organic tin stabilizer, specifically octyl tin maleate.
2) At normal temperature, putting the hydrophilic dispersion type PVC resin, the loose spherical PVC resin, the filler and the stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 5 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 8 minutes and placed for curing for 32 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing at 120 ℃ for 40 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 4
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, polybutyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 1250, the filler is a mixture of calcium carbonate, mica powder and white carbon black according to the mass ratio of 1:1:1, the plasticizer is dioctyl phthalate, the lubricant is a mixture of calcium stearate, zinc stearate and barium stearate according to the mass ratio of 1:1:1, and the stabilizer is a barium-zinc stabilizer, specifically a mixture of barium ricinoleate and zinc laurate according to the mass ratio of 1: 1.
2) At normal temperature, putting the hydrophilic dispersion type PVC resin, the loose spherical PVC resin, the filler and the stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 5 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 10 minutes and placed for curing for 18 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing at 160 ℃ for 25 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 5
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, polybutyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 1250, the filler is a mixture of calcium carbonate, mica powder and white carbon black according to the mass ratio of 3:1:1, the plasticizer is a mixture of dioctyl phthalate, dioctyl terephthalate and dioctyl isophthalate according to the mass ratio of 1:1:1, the lubricant is a mixture of liquid paraffin and naphthenic oil according to the mass ratio of 1:1, and the stabilizer is a potassium-zinc stabilizer, specifically a mixture of potassium laurate and zinc laurate according to the mass ratio of 1: 1.
2) At normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 7 minutes and placed for curing for 28 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing for 28 minutes at 150 ℃ to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 6
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium salt, poly hexyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 2000, the filler is a mixture of calcium carbonate, mica powder and white carbon black according to the mass ratio of 3:1:1, the plasticizer is a mixture of dioctyl phthalate, dioctyl terephthalate and dioctyl isophthalate according to the mass ratio of 3:1:1, the lubricant is a mixture of liquid paraffin and wool fat according to the mass ratio of 1:1, and the stabilizer is a calcium-zinc stabilizer, specifically a mixture of calcium ricinoleate and zinc laurate according to the mass ratio of 1: 1.
2) At normal temperature, putting the hydrophilic dispersion type PVC resin, the loose spherical PVC resin, the filler and the stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 4 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 5 minutes and placed for curing for 30 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing at 130 ℃ for 35 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 7
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, poly octyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 1250, the filler is a mixture of calcium carbonate, mica powder and white carbon black according to the mass ratio of 3:1:1, the plasticizer is a mixture of dioctyl phthalate, dioctyl terephthalate and dioctyl isophthalate according to the mass ratio of 3:1:1, the lubricant is a mixture of naphthenic oil and wool grease according to the mass ratio of 1:1, and the stabilizer is a liquid composite stabilizer, specifically a mixture of barium isooctanoate and zinc isooctanoate according to the mass ratio of 1: 1.
2) At normal temperature, putting the hydrophilic dispersion type PVC resin, the loose spherical PVC resin, the filler and the stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 5 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 8 minutes and placed for curing for 20 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing for 30 minutes at 140 ℃ to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 8
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, poly octyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 500, the filler is a mixture of calcium carbonate, mica powder and white carbon black according to the mass ratio of 3:1:1, the plasticizer is a mixture of dioctyl phthalate, dioctyl terephthalate and dioctyl isophthalate according to the mass ratio of 3:1:1, the lubricant is a mixture of hydrogenated castor oil, epoxy soybean oil and butyl stearate according to the mass ratio of 1:1:1, and the stabilizer is a calcium-zinc stabilizer and a barium-zinc stabilizer, specifically a mixture of calcium ricinoleate, barium ricinoleate and zinc laurate according to the mass ratio of 1:1: 1.
2) At normal temperature, putting the hydrophilic dispersion type PVC resin, the loose spherical PVC resin, the filler and the stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 5 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 5 minutes and placed for curing for 24 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing for 28 minutes at 150 ℃ to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 9
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium salt, poly hexyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 500, the filler is the mixture of talcum powder, kaolin and carbon black according to the mass ratio of 3:1:1, the plasticizer is the mixture of dibutyl phthalate, dioctyl terephthalate and dioctyl isophthalate according to the mass ratio of 3:1:1, and the lubricant is naphthenic oil, wool grease and liquid paraffin according to the mass ratio of 1:1, and the stabilizer is a calcium-zinc stabilizer and a potassium-zinc stabilizer, and specifically is a mixture of calcium ricinoleate, zinc laurate and potassium laurate in a mass ratio of 1:1: 1.
2) At normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty coating is obtained, and the uniform pasty coating is vacuumized, stirred for 5 minutes and placed for curing for 24 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing for 30 minutes at 140 ℃ to prepare a sheet-shaped plate with the thickness of 3 mm.
Example 10
A preparation method of a hydrophilic dispersion type PVC-based damping composition material comprises the following steps:
1) weighing the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing polyvinyl benzene sulfonic acid sodium, polybutyl acrylate and polyvinyl chloride, and the structural formula (I) of the hydrophilic dispersion type PVC resin is shown as follows:
wherein: the polymerization degree of the loose spherical PVC resin is 1250, the filler is a mixture of titanium dioxide, alumina powder and quartz powder in a mass ratio of 3:1:1, the plasticizer is a mixture of diethyl phthalate, dioctyl terephthalate and dioctyl isophthalate in a mass ratio of 3:1:1, the lubricant is a mixture of naphthenic oil, wool fat and liquid paraffin in a mass ratio of 1:1:1, and the stabilizer is a calcium-zinc stabilizer, specifically a mixture of calcium ricinoleate and zinc laurate in a mass ratio of 1: 1.
2) At normal temperature, putting the hydrophilic dispersion type PVC resin, the loose spherical PVC resin, the filler and the stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 4 minutes;
3) at normal temperature, the plasticizer and the lubricant in parts by weight are sequentially put into a high-speed dispersion machine for dispersion until uniform pasty damping composition coating is obtained, and the damping composition coating is vacuumized, stirred for 5 minutes and placed for curing for 24 hours.
4) Taking out the coating obtained in the step 3), spraying the coating on an electrophoresis plate, and plasticizing for 30 minutes at 140 ℃ to prepare a sheet-shaped plate with the thickness of 3 mm.
The paste coating prepared in examples 1 to 10 and the sheet-like plate were subjected to various performance tests under the following conditions:
1. mechanical strength
And cutting the sheet-shaped plate into the standard sample according to the national standard GB/T1040-2006, and testing the tensile property by using a tensile machine.
2. Sagging property
Samples were tested for viscosity values at different rotational speeds using DHR.
3. Damping performance
The sheet-like plates were cut into 25mm × 3mm bars and the samples were tested for loss factor at different frequencies using DMA.
The damping composition coatings containing hydrophilic dispersion PVC prepared in examples 1-10 were tested according to the above test methods, and the specific test data are shown in Table 1.
TABLE 1 test data for coatings of hydrophilic dispersion PVC-containing damping compositions prepared in examples 1-10
From table 1, it can be seen that: the damping composition coating containing hydrophilic dispersion PVC prepared by the method of the invention has excellent tensile strength, elongation at break and high loss factor.
FIG. 1 is a graph of viscosity values of PVC-based damping composition coatings prepared in examples 1-10 of the present invention. As can be seen from FIG. 1, the hydrophilic dispersion type PVC-based damping composition coating prepared by the invention has higher viscosity at a low shear rate and lower viscosity at a high shear rate, and has good sag resistance and sprayability.
FIG. 2 is a graph of the loss factor for PVC-based damping composition materials prepared in examples 1-10 of the present invention. As can be seen from FIG. 2, the hydrophilic dispersion type PVC-based damping composition material prepared by the present invention has a high dissipation factor.
The core of the invention is that the hydrophilic dispersion type PVC resin is compounded with loose spherical PVC resin, so that the prepared damping composition coating has high damping factor, is water-based, has low VOC, is pollution-free, and is green and environment-friendly. Meanwhile, the inorganic particles are used as the filler, and the organic esters are used as the plasticizer, so that the density and viscosity of the product can be conveniently controlled. In addition, the inorganic particle filler is dispersed in the PVC matrix, so that the intramolecular friction of the product is increased, the tensile strength and the elongation at break of the product are improved, and meanwhile, the coating is endowed with excellent sagging resistance, so that the coating has sprayability. In conclusion, the hydrophilic dispersion type PVC-based damping composition material prepared by the invention has excellent tensile strength, elongation at break, sag resistance and high loss factor.
It should be noted that, although the above embodiments have been described herein, the invention is not limited thereto. Therefore, based on the innovative concepts of the present invention, the technical solutions of the present invention can be directly or indirectly applied to other related technical fields by making changes and modifications to the embodiments described herein, or by using equivalent structures or equivalent processes performed in the content of the present specification and the attached drawings, which are included in the scope of the present invention.
Claims (9)
1. A damping composition containing hydrophilic dispersion type PVC resin is characterized in that: the paint comprises the following components in parts by weight:
the hydrophilic dispersion type PVC resin is obtained by copolymerizing sodium polyvinylbenzene sulfonate, polyacrylate and polyvinyl chloride, and the structural formula of the hydrophilic dispersion type PVC resin is shown as a formula I:
in the formula I, R is n-butyl, n-hexyl or n-octyl; x is a positive integer of 10 to 100, y is a positive integer of 10 to 200, and z is a positive integer of 200 to 800.
2. The damping composition containing hydrophilic dispersion PVC resin according to claim 1, characterized in that: the loose spherical PVC resin is a homopolymer prepared from chloroethylene by an emulsion method, and the polymerization degree is 500-2000.
3. The damping composition containing hydrophilic dispersion PVC resin according to claim 1, characterized in that: the filler is one or a mixture of more than two of the following materials: calcium carbonate, titanium dioxide, mica powder, talcum powder, kaolin, alumina powder, carbon black, quartz powder or white carbon black.
4. The hydrophilic dispersion type PVC resin-containing damping composition according to claim 3, wherein: the filler is one or a mixture of more than two of the following materials: calcium carbonate, mica powder or white carbon black.
5. The damping composition containing hydrophilic dispersion PVC resin according to claim 1, characterized in that: the plasticizer is one or a mixture of more than two of the following components: phthalates, dioctyl isophthalate, dioctyl terephthalate; the structural formula of the phthalate ester is shown as a formula II:
in the formula II, R is ethyl, n-butyl, isobutyl, n-octyl, isooctyl or isononyl.
6. The damping composition containing hydrophilic dispersion PVC resin according to claim 1, characterized in that: the lubricant is one or a mixture of more than two of the following components: liquid paraffin, naphthenic oil, hydrogenated castor oil, epoxidized soybean oil, butyl stearate, calcium stearate, zinc stearate, barium stearate or lanolin.
7. The hydrophilic dispersion type PVC resin-containing damping composition according to claim 6, wherein: the lubricant is one or a mixture of more than two of the following components: liquid paraffin, naphthenic oil or lanolin.
8. The damping composition containing hydrophilic dispersion PVC resin according to claim 1, characterized in that: the stabilizer is one or a mixture of more than two of the following components: calcium zinc stabilizer, lead salt composite stabilizer, organic tin stabilizer, liquid composite stabilizer, barium zinc stabilizer and potassium zinc stabilizer.
9. A method for preparing a damping composition comprising hydrophilic dispersion PVC resin according to any one of claims 1 to 8, characterized in that: the preparation method comprises the following steps:
1) at normal temperature, putting hydrophilic dispersion type PVC resin, loose spherical PVC resin, filler and stabilizer in parts by weight into a high-speed dispersion machine for dispersion for 3-5 minutes;
2) at normal temperature, sequentially adding the plasticizer and the lubricant in parts by weight into the high-speed dispersion machine in the step 1) for dispersion until uniform pasty coating is obtained, vacuumizing and stirring for 4-10 minutes, and standing and curing for 18-32 hours;
3) taking out the coating prepared in the step 2), spraying the coating on an electrophoresis plate, and plasticizing at the temperature of 120-160 ℃ for 25-40 minutes to prepare a sheet-shaped plate with the thickness of 3 mm.
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| CN112852233B (en) * | 2020-12-31 | 2022-09-20 | 东莞职业技术学院 | New energy battery box with water-based stone-strike preventing coating |
| CN116218294A (en) * | 2022-11-16 | 2023-06-06 | 保光(天津)汽车零部件有限公司 | Damping stone-impact-resistant coating and preparation method thereof |
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