CN117777694A - Light SMC molding compound with whole body color and preparation method thereof - Google Patents
Light SMC molding compound with whole body color and preparation method thereof Download PDFInfo
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- CN117777694A CN117777694A CN202311835137.4A CN202311835137A CN117777694A CN 117777694 A CN117777694 A CN 117777694A CN 202311835137 A CN202311835137 A CN 202311835137A CN 117777694 A CN117777694 A CN 117777694A
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 57
- 238000000465 moulding Methods 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000011435 rock Substances 0.000 claims abstract description 63
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 35
- 239000003365 glass fiber Substances 0.000 claims abstract description 20
- 239000002562 thickening agent Substances 0.000 claims abstract description 14
- 229920006337 unsaturated polyester resin Polymers 0.000 claims abstract description 12
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000003112 inhibitor Substances 0.000 claims abstract description 7
- 238000006116 polymerization reaction Methods 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims description 42
- 239000011347 resin Substances 0.000 claims description 42
- 239000004743 Polypropylene Substances 0.000 claims description 32
- -1 polypropylene Polymers 0.000 claims description 32
- 229920001155 polypropylene Polymers 0.000 claims description 32
- 230000002378 acidificating effect Effects 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 13
- AZQWKYJCGOJGHM-UHFFFAOYSA-N 1,4-benzoquinone Chemical group O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 claims description 12
- 238000004513 sizing Methods 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 239000002202 Polyethylene glycol Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920001223 polyethylene glycol Polymers 0.000 claims description 8
- BWDBEAQIHAEVLV-UHFFFAOYSA-N 6-methylheptan-1-ol Chemical compound CC(C)CCCCCO BWDBEAQIHAEVLV-UHFFFAOYSA-N 0.000 claims description 7
- BVFSYZFXJYAPQJ-UHFFFAOYSA-N butyl(oxo)tin Chemical compound CCCC[Sn]=O BVFSYZFXJYAPQJ-UHFFFAOYSA-N 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 7
- 239000012535 impurity Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 238000003756 stirring Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- QEQBMZQFDDDTPN-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy benzenecarboperoxoate Chemical compound CC(C)(C)OOOC(=O)C1=CC=CC=C1 QEQBMZQFDDDTPN-UHFFFAOYSA-N 0.000 claims description 2
- IFXDUNDBQDXPQZ-UHFFFAOYSA-N 2-methylbutan-2-yl 2-ethylhexaneperoxoate Chemical compound CCCCC(CC)C(=O)OOC(C)(C)CC IFXDUNDBQDXPQZ-UHFFFAOYSA-N 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000000080 wetting agent Substances 0.000 claims description 2
- BWOITHKYQUJGSB-UHFFFAOYSA-N 2-methylbutan-2-ylperoxycyclohexane Chemical compound CCC(C)(C)OOC1CCCCC1 BWOITHKYQUJGSB-UHFFFAOYSA-N 0.000 claims 1
- 239000002994 raw material Substances 0.000 abstract description 3
- 239000003677 Sheet moulding compound Substances 0.000 description 33
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 14
- 239000000945 filler Substances 0.000 description 12
- 238000010521 absorption reaction Methods 0.000 description 9
- 239000000395 magnesium oxide Substances 0.000 description 9
- 239000003921 oil Substances 0.000 description 8
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- IMYCVFRTNVMHAD-UHFFFAOYSA-N 1,1-bis(2-methylbutan-2-ylperoxy)cyclohexane Chemical compound CCC(C)(C)OOC1(OOC(C)(C)CC)CCCCC1 IMYCVFRTNVMHAD-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000748 compression moulding Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 4
- 238000003892 spreading Methods 0.000 description 4
- 230000007480 spreading Effects 0.000 description 4
- GJBRNHKUVLOCEB-UHFFFAOYSA-N tert-butyl benzenecarboperoxoate Chemical compound CC(C)(C)OOC(=O)C1=CC=CC=C1 GJBRNHKUVLOCEB-UHFFFAOYSA-N 0.000 description 4
- 238000005303 weighing Methods 0.000 description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000006082 mold release agent Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 239000002002 slurry Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 239000005445 natural material Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229940113115 polyethylene glycol 200 Drugs 0.000 description 1
- 229940068918 polyethylene glycol 400 Drugs 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Macromonomer-Based Addition Polymer (AREA)
Abstract
The invention provides a whole-body-color lightweight SMC molding compound, which comprises the following components in parts by weight: 110-120 parts of unsaturated polyester resin, 60-70 parts of low shrinkage agent, 2.8-4 parts of viscosity-reducing dispersant, 0.9-1.3 parts of polymerization inhibitor, 8-9 parts of release agent, 2-2.5 parts of curing agent, 270-290 parts of modified volcanic rock powder, 8-11 parts of thickener and 166-203 parts of glass fiber. The invention also provides a preparation method of the whole-body-color lightweight SMC molding compound. The invention fully utilizes and modifies the natural raw material volcanic rock, and the SMC molding compound product has the advantages of low density, whole body color, light weight and high strength.
Description
Technical Field
The invention belongs to the field of organic high molecular compound materials, and particularly relates to a light-weight SMC molding compound with a full body color prepared from volcanic rock and a preparation method thereof.
Background
SMC sheet molding compounds generally contain 36-45% of filler, 26-32% of glass fiber yarn and the density of the product is generally 1.76-1.85g/cm 3 The density is 22-24% of the steel density. And the demands for low-density and light-weight products in the fields of railway traffic, new energy, military industry, high-rise building materials and the like are increasing greatly in the current development. Obviously, the density weight of a typical SMC molding compound does not meet the requirements for lightweight SMC articles. Volcanic rock is a natural material, has rich sources of raw materials, environmental protection, low cost and low density, and is an excellent choice as a light filler.
In addition, in the large number of SMC articles available, the color of the article (by color paste toning) and the filler (e.g., white calcium carbonate, etc.) are inconsistent, which results in excessive exposure of the filler color during use when accidental damage (e.g., scratches) occurs to the surface of the article, affecting the surface aesthetics. The volcanic rock powder is used for producing a material with a full body color by using the volcanic rock powder with colors instead of general white fillers such as calcium carbonate, so that the difference between the colors of the surface of the product and the fillers when the product is accidentally damaged (such as scratches) can be obviously reduced, and the aesthetic feeling of the product is maintained.
The year 2022 China is the largest new energy automobile producing country and consuming country in the world, and is also the largest new energy automobile export country in the standard. The export of the new energy automobile in China reaches 67.9 ten thousand, the export of the new energy automobile is increased by 120 percent in the same ratio, sales volume is continuously increased for 8 years, the new energy automobile in China realizes curve overtaking by virtue of the expression of the new energy automobile under the big background of global carbon reduction, energy conservation and emission reduction become the basic requirements of the healthy development of the automobile industry, and the new energy automobile not only reduces the weight of the self battery, but also reduces the weight of other parts and battery covers, thereby being one of the most effective ways for realizing the light weight of the automobile.
Volcanic rock is also called as an ejected rock (effective rock), belongs to a type of rock magma rock (igneous rock), and is an ejected rock formed by ejecting rock magma to the ground surface through a volcanic rock port and then condensing the rock magma. The rock formation in nature is varied and varied, such as bedrock, neutral rock, acid rock, and also alkaline rock, carbonate rock, and the like. Rough surface of volcanic rock appearance,Is porous and has a density of 1-1.25g/cm 3 Volcanic rock is an ideal natural green filler, contains a large amount of mineral elements such as silicon, potassium, sodium, iron, magnesium and the like, has high strength, heat preservation, heat insulation, sound absorption, water resistance, fire resistance, acid and alkali resistance, stain resistance, corrosion resistance, mildew resistance, no pollution, no radioactivity and the like.
The volcanic rock is very wide in producing area, the main distribution area of the volcanic rock is approximately the same as that of an earthquake zone, and the main distribution area is mainly distributed along the land zone of contact between the Pacific earthquake zone and the inner land plate of the continent, namely, the east coast line zone, the southwest, the northeast Changbai mountain area, the inner Mongolia, the Kunlun mountain area and the like.
Disclosure of Invention
The invention aims at solving the technical problems, and provides an SMC molding compound with stable color, light weight, low density and high strength by utilizing the characteristics of light weight, low density and original color of volcanic.
In order to achieve the aim of the invention, the invention provides a full-body-color lightweight SMC molding compound, which comprises the following components in parts by weight: 110-120 parts of unsaturated polyester resin, 60-70 parts of low shrinkage agent, 2.8-4 parts of viscosity-reducing dispersant, 0.9-1.3 parts of polymerization inhibitor, 8-9 parts of release agent, 2-2.5 parts of curing agent, 270-290 parts of modified volcanic rock powder, 8-11 parts of thickener and 166-203 parts of glass fiber.
Preferably, the modified volcanic rock powder is obtained by modifying basic volcanic rock powder by an acidic wetting agent.
More preferably, the acidic sizing agent is prepared by the following steps: adding polyethylene glycol, maleic anhydride and monobutyl tin oxide, heating to 80-88 ℃ under the protection of nitrogen, preserving heat, reacting for 2-3 hours, adding isooctanol, reacting for 1.5-2 hours, and obtaining the acidic impregnating compound, wherein the molar ratio of the polyethylene glycol, the maleic anhydride, the monobutyl tin oxide and the isooctanol is [1-1.1]: [1.95-2.05]:0.00005-0.00007: [0.85-0.9]. More preferably, the molecular weight of the acidic sizing agent is 912-1090g/mol, and the acid value is 55-69mgKOH/g.
More preferably, the acidic sizing agent is used for alkaline volcanic rock powderThe modification steps are as follows: after removing impurities, grinding the alkaline volcanic rock into particles with the diameter of 13-18 mu m, preheating to the material temperature of 105-110 ℃, stirring and drying for 10-15 minutes, adding an acidic impregnating compound, and modifying for 5-10 minutes to obtain the modified volcanic rock powder. The water content of the final modified volcanic rock powder is controlled to be 0.06-0.09%, and the density is 1.03-1.07g/cm 3 . Preferably, the alkaline volcanic rock powder has an oil absorption value of 42 to 50.
Preferably, the polyethylene glycol is one or more of polyethylene glycol 200, polyethylene glycol 400.
Preferably, the viscosity reducing dispersant is one or more of BYK-W9010, BYK-W985 and BYK-W996.
Preferably, the low shrinkage agent is LY-D1, a low shrinkage agent sold by Zhaoqing Futian chemical Co.
Preferably, the polymerization inhibitor is p-benzoquinone.
Preferably, the unsaturated polyester resin is an unsaturated polyester resin LY-809 produced by Zhaoqing Futian chemical Co., ltd.
Preferably, the release agent is one or more of zinc stearate and BYK-P9065.
Preferably, the curing agent is one or more of tert-butyl peroxybenzoate, tert-amyl peroxy-2-ethylhexanoate, and 1, 1-bis (tert-amyl peroxy) cyclohexane.
Preferably, the thickener is a magnesium oxide paste.
Preferably, the glass fibers are alkali-free glass fibers, preferably 43mm to 52mm in length.
In addition, the invention also provides a method for preparing the whole-body-color lightweight SMC molding compound, which comprises the following steps of:
(1) Uniformly mixing unsaturated polyester resin, a low shrinkage agent, a viscosity reduction dispersing agent, a polymerization inhibitor, a release agent, a curing agent and modified volcanic rock powder to obtain resin paste;
(2) Adding a thickening agent, mixing with the resin paste on line to obtain a finished resin paste, respectively coating the finished resin paste on the inner surfaces of an upper polypropylene film and a lower polypropylene film, uniformly distributing glass fiber yarns on the polypropylene film coated with the finished resin paste, paving the other polypropylene film coated with the finished resin paste on the glass fiber yarns, pressing a rod, removing bubbles, soaking, pressurizing, packaging, and curing at 38-42 ℃ for 18-24 hours to obtain the SMC molding compound.
The invention utilizes natural alkaline volcanic rock, after being modified by acid impregnating compound, the low density characteristic and self color of the modified volcanic rock powder are used as low density filler and provide color function to replace traditional calcium carbonate, aluminum hydroxide, glass bead filler and color paste components thereof in SMC molding compound to prepare SMC molding compound, the volcanic rock powder can be used as filler and endow color function, when the volcanic rock powder is used in the SMC molding compound, other fillers and pigments are not added, and the original colors (including red, black and gray) of the volcanic rock are utilized, so that the external surface and internal color of the product are the same (whole body color), and the whole body color lightweight molding compound can be prepared by compounding. In addition, the original alkaline volcanic powder is modified by the acidic impregnating compound to obtain the modified volcanic powder with low oil absorption value, so that the impregnating binding force of the resin and the volcanic powder is increased, and the consistency and the mechanical strength of the product are improved. Compared with the prior art, the invention fully utilizes the volcanic rock as a natural raw material, and the SMC molding compound product can realize stable color, light weight and density of 1.25-1.31g/cm 3 The weight is reduced by 36-41% compared with the conventional SMC molding compound, and the molding compound has high strength.
Detailed Description
In order to more clearly illustrate the present invention, the following describes the technical scheme of the present invention in detail in conjunction with specific embodiments. It should be understood that the following examples are illustrative only and are not limiting of the present application.
The components used in the present invention are commercially available unless otherwise specified as existing products. For example, the viscosity reducing dispersant exemplified for use in the present invention may be BYK-W9010, BYK-W985, BYK-W996 products available from Pick corporation, the mold release agent may be one or more of zinc stearate, BYK-P9065, the unsaturated polyester resin may be one of LY-809, which is manufactured and sold by Zhaoqing Fu chemical Co., ltd, the low shrinkage agent may be one of LY-D1, which is manufactured and sold by Zhaoqing Fu chemical Co., ltd, and the thickener magnesium oxide may be one of LY-39003, which is manufactured and sold by Zhaoqing Fu chemical Co., ltd, but not limited thereto, and those skilled in the art may select the same kind and have the same or similar properties as those manufactured and sold by other manufacturers.
The expression "parts" of components referred to herein, unless otherwise indicated, refer to parts by weight.
Example 1
1mol of polyethylene glycol, 1.95mol of maleic anhydride and 0.00005mol of monobutyl tin oxide are added into a container containing stirring slurry, the mixture is heated to 80 ℃ under the protection of nitrogen to react for 2 hours under the heat preservation, 0.85mol of isooctanol is added to react for 1.5 hours, and the acidic sizing agent is obtained, the molecular weight Mn (daltons) of the acidic sizing agent is 912g/mol, and the acid value is 69mgKOH/g.
Removing impurities from alkaline volcanic rock (pH 9), and grinding into particles with the diameter of 13 mu m; 100g of volcanic rock after grinding is firstly preheated to the material temperature of 105 ℃, stirred and dried for 10 minutes, 0.8g of acid impregnating compound is added after metering, the modification time is 5 minutes, and the volcanic rock powder finished product is obtained, the pH value is 8.0, the oil absorption value is 42, the water content is 0.06 percent, and the density is 1.05g/cm 3 。
The resin paste was obtained by uniformly mixing 110g of LY-809 unsaturated polyester resin, 70g of LY-D1 low shrinkage agent, 2.8g of BYK-9010, 0.9g of p-benzoquinone, 8g of zinc stearate as a mold release agent, 1g of t-butyl peroxybenzoate as a curing agent, 1g of 1, 1-bis (t-amyl peroxy) cyclohexane as a curing agent, and 270g of modified volcanic powder.
8g of thickener magnesia paste is added on line through a metering pump, and is mixed with the prepared resin paste on line to obtain a finished resin paste, the finished resin paste is respectively coated on the inner surfaces of an upper polypropylene film and a lower polypropylene film, 166g of glass fiber yarn with the length of 43mm is cut by adjusting the speed of a cutter and uniformly distributed on the polypropylene film coated with the finished resin paste, the other polypropylene film coated with the finished resin paste is paved on the glass fiber yarn, and the polypropylene film is driven by a driving wheel to undergo bar pressing, bubble removal, infiltration, pressurization and packaging, and then is cured for 18 hours at 42 ℃ to obtain the cured lightweight SMC molding compound sheet.
Cutting the cured SMC molding compound sheet, tearing off two polypropylene films on the surface of the SMC molding compound sheet, weighing, and spreading in a mould at 140-148 ℃ for compression molding.
Example 2
1.05mol of polyethylene glycol, 2mol of maleic anhydride and 0.00006mol of monobutyl tin oxide are added into a container containing stirring slurry, the mixture is heated to 85 ℃ under the protection of nitrogen to react for 2.5 hours at a constant temperature, 0.88mol of isooctanol is added to react for 1.8 hours, and an acidic sizing agent is obtained, wherein the molecular weight Mn (daltons) of the acidic sizing agent is 1005g/mol, and the acid value is 62mgKOH/g.
Removing impurities from alkaline volcanic rock (pH 9), and grinding into particles with the particle size of 15 mu m; 100g of volcanic rock after grinding is preheated to the material temperature of 108 ℃ and is stirred and dried for 12 minutes, 0.9g of acid impregnating compound is added, the modification time is 7 minutes, and the finished product of the modified volcanic rock powder is obtained, the pH value is 8.6, the oil absorption value is 47, the water content is 0.08 percent, and the density is 1.03g/cm 3 。
115g of LY-809 unsaturated polyester resin, 68g of LY-D1 low shrinkage agent, 3.5g of BYK-9010, 1.1g of p-benzoquinone, 8.5g of release agent zinc stearate, 1.2g of curing agent tert-butyl peroxybenzoate, 1.1g of curing agent 1, 1-bis (tert-amyl peroxy) cyclohexane and 280g of modified volcanic rock powder are uniformly mixed to obtain resin paste.
10g of thickener magnesia paste is added on line through a metering pump, the thickener magnesia paste is mixed with the prepared resin paste on line to obtain a finished product resin paste, the finished product resin paste is respectively coated on the inner surfaces of an upper polypropylene film and a lower polypropylene film, 184g of glass fiber yarn with the length of 43mm is cut by adjusting the speed of a cutter and uniformly distributed on the polypropylene film coated with the finished product resin paste, the other polypropylene film coated with the finished product resin paste is paved on the glass fiber yarn, and the polypropylene film is driven by a driving wheel to be cured for 20 hours at 40 ℃ after being pressed, defoamed, infiltrated, pressurized and packaged, so that the cured lightweight SMC molding compound sheet is obtained.
Cutting the cured SMC molding compound sheet, tearing off two polypropylene films on the surface of the SMC molding compound sheet, weighing, and spreading in a mould at 140-148 ℃ for compression molding.
Example 3
1.1mol of polyethylene glycol, 2.05mol of maleic anhydride and 0.00007mol of monobutyl tin oxide are added into a container containing stirring slurry, the mixture is heated to 88 ℃ under the protection of nitrogen to react for 3 hours under the heat preservation, 0.9mol of isooctanol is added to react for 2 hours, and an acidic sizing agent is obtained, the molecular weight Mn (daltons) of the acidic sizing agent is 1090g/mol, and the acid value is 55mgKOH/g.
Removing impurities from alkaline volcanic rock (pH 10), and grinding into particles with the diameter of 18 mu m; 100g of volcanic rock after grinding is preheated to the material temperature of 110 ℃, stirred and dried for 15 minutes, 1.1g of acid impregnating compound is added, the modification time is 10 minutes, and the finished product of the modified volcanic rock powder is obtained, the pH value is 9, the oil absorption value is 50, the water content is 0.09 percent, and the density is 1.07g/cm 3 。
The resin paste was obtained by uniformly mixing 120g of LY-809 unsaturated polyester resin, 60g of LY-D1 low shrinkage agent, 4g of BYK9010, 1.3g of p-benzoquinone, 9g of zinc stearate as a mold release agent, 1.5g of tert-butyl peroxybenzoate as a curing agent, 1.0g of 1, 1-bis (tert-amyl peroxy) cyclohexane as a curing agent, and 290g of modified volcanic powder.
11g of thickener magnesia paste is added on line through a metering pump, the thickener magnesia paste is mixed with the prepared resin paste on line to obtain a finished product resin paste, the finished product resin paste is respectively coated on the inner surfaces of an upper polypropylene film and a lower polypropylene film, 203g of glass fiber yarn with the length of 52mm is cut by adjusting the speed of a cutter and uniformly distributed on the polypropylene film coated with the finished product resin paste, the other polypropylene film coated with the finished product resin paste is paved on the glass fiber yarn, and the polypropylene film is driven by a driving wheel to be cured for 24 hours at 38 ℃ after being pressed, defoamed, infiltrated, pressurized and packaged, so that the cured lightweight SMC molding compound sheet is obtained.
Cutting the cured SMC molding compound sheet, tearing off two polypropylene films on the surface of the SMC molding compound sheet, weighing, and spreading in a mould at 140-148 ℃ for compression molding.
Comparative example
Basic volcanicRemoving impurities from rock (pH 10), and grinding into particles with the diameter of 15 mu m; 100g of volcanic rock after grinding is preheated to the material temperature of 110 ℃ and is stirred and dried for 15 minutes, the water content is 0.085 percent, and the density is 1.02g/cm 3 The oil absorption value was 63.
115g of LY-809 unsaturated polyester resin, 68g of LY-D1 low shrinkage agent, 3.5g of BYK-9010, 1.1g of p-benzoquinone, 8.5g of release agent zinc stearate, 1.2g of curing agent tert-butyl peroxybenzoate, 1.1g of curing agent 1, 1-bis (tert-amyl peroxy) cyclohexane and 280g of alkaline volcanic powder are mixed to obtain resin paste. In the comparative example, the volcanic rock powder is not treated by the acid impregnating compound, the oil absorption value of the volcanic rock powder is higher, the initial viscosity of the resin paste is higher, and the viscosity is 4.4E 4 CP/38.7℃。
10g of thickener magnesium oxide paste is added on line through a metering pump, the thickener magnesium oxide paste is mixed with the prepared resin paste on line to obtain a finished product resin paste, the finished product resin paste is respectively coated on the inner surfaces of an upper polypropylene film and a lower polypropylene film, 184g of glass fiber yarn with the length of 43mm is cut through adjusting the speed of a cutter and uniformly distributed on the polypropylene film coated with the finished product resin paste, the other polypropylene film coated with the finished product resin paste is paved on the glass fiber yarn, the polypropylene film is driven by a driving wheel to be subjected to bar pressing, bubble removal, infiltration and pressurization, and after packaging, the finished product resin paste is cured for 18 hours at 42 ℃ to obtain a cured SMC molding compound sheet.
Cutting the cured SMC molding compound sheet, tearing off two polypropylene films on the surface of the SMC molding compound sheet, weighing, and spreading in a mould at 140-148 ℃ for compression molding.
Performance test results
The test and comparison data of the lightweight SMC molding compound prepared by the invention are shown in the following table 1.
Table 1: performance test results of SMC molding compound
| Performance of | Unit (B) | Example 1 | Example 2 | Example 3 | Comparative example |
| Density of | g/cm 3 | 1.25 | 1.27 | 1.31 | 1.27 |
| Tensile Strength | MPa | 53.7 | 56.2 | 57.8 | 45.2 |
| Modulus of elasticity in tension | MPa | 11358 | 10862 | 11813 | 9670 |
| Flexural Strength | MPa | 157 | 159 | 164 | 148 |
| Flexural modulus of elasticity | MPa | 10430 | 10847 | 12103 | 10192 |
| Impact toughness | kJ/m 2 | 51 | 51 | 52 | 46 |
| Bar Ke Yingdu | --- | 65 | 65 | 65 | 65 |
From the above experimental data, it was found that the light-weight SMC molding materials prepared in example 1, example 2 and example 3 had a product density of 1.25 to 1.31g/cm 3 The physical characteristics are not greatly different, and each example has the compoundability in the range of numerical values, the comparative example adopts volcanic rock powder which is not modified by an acid impregnating compound, and the unmodified volcanic rock powder has larger oil absorption value, and the resin and the volcanic rock powder are in poor impregnating binding force, so that the viscosity of the resin paste is larger, the resin paste is in poor impregnation with glass fiber yarns, the glass fiber yarns in the sheet are partially white, the product strength is lower than that of examples 1-3, the performance detection results of examples 1-3 show that the volcanic rock powder is required to be modified, and the filler used for preparing SMC molding compound has better performance, and the technical scheme of the inventionThe light SMC molding compound prepared based on the modified volcanic rock has the performance advantages of stable color, light weight and high strength.
The invention is not limited to the embodiments described above, but several improvements and modifications can be made by a person skilled in the art without departing from the point of view of the invention, which improvements and modifications are also considered to be within the scope of the invention. What is not described in detail in this specification is prior art known to those skilled in the art.
Claims (10)
1. The whole-color light SMC molding compound is characterized by comprising the following components in parts by weight: 110-120 parts of unsaturated polyester resin, 60-70 parts of low shrinkage agent, 2.8-4 parts of viscosity-reducing dispersant, 0.9-1.3 parts of polymerization inhibitor, 8-9 parts of release agent, 2-2.5 parts of curing agent, 270-290 parts of modified volcanic rock powder, 8-11 parts of thickener and 166-203 parts of glass fiber.
2. The SMC molding compound of claim 1, wherein said modified volcanic powder is obtained by modifying a basic volcanic powder with an acidic wetting agent.
3. The SMC molding compound according to claim 2, characterized in that said acidic sizing agent is prepared by the steps of: adding polyethylene glycol, maleic anhydride and monobutyl tin oxide, heating to 80-88 ℃ under the protection of nitrogen, preserving heat, reacting for 2-3 hours, adding isooctanol, reacting for 1.5-2 hours, and obtaining the acidic impregnating compound, wherein the molar ratio of the polyethylene glycol, the maleic anhydride, the monobutyl tin oxide and the isooctanol is [1-1.1]: [1.95-2.05]:0.00005-0.00007: [0.85-0.9].
4. The SMC molding compound of claim 3, wherein the acidic sizing agent has a molecular weight of 912 to 1090g/mol and an acid value of 55 to 69mgKOH/g.
5. The SMC molding compound of claim 2, wherein the step of modifying the basic volcanic powder with an acidic sizing agent is as follows: after removing impurities, grinding the alkaline volcanic rock into particles with the diameter of 13-18 mu m, preheating to the material temperature of 105-110 ℃, stirring and drying for 10-15 minutes, adding an acidic impregnating compound, and modifying for 5-10 minutes to obtain the modified volcanic rock powder.
6. The SMC molding compound according to claim 1, characterized in that said viscosity reducing dispersant is one or more of BYK-W9010, BYK-W985, BYK-W996.
7. The SMC molding compound of claim 1, wherein said inhibitor is p-benzoquinone.
8. The SMC molding compound of claim 1, wherein said release agent is one or more of zinc stearate, BYK-P9065.
9. The SMC molding compound of claim 1, wherein said curing agent is one or more of t-butyl peroxybenzoate, t-amyl peroxy-2-ethylhexanoate, 1-bis (t-amyl peroxy) cyclohexane.
10. A method of preparing the SMC molding compound of claim 1, comprising the steps of:
(1) Uniformly mixing unsaturated polyester resin, a low shrinkage agent, a viscosity reduction dispersing agent, a polymerization inhibitor, a release agent, a curing agent and modified volcanic rock powder to obtain resin paste;
(2) Adding a thickening agent, mixing with the resin paste on line to obtain a finished resin paste, respectively coating the finished resin paste on the inner surfaces of an upper polypropylene film and a lower polypropylene film, uniformly distributing glass fiber yarns on the polypropylene film coated with the finished resin paste, paving the other polypropylene film coated with the finished resin paste on the glass fiber yarns, pressing a rod, removing bubbles, soaking, pressurizing, packaging, and curing at 38-42 ℃ for 18-24 hours to obtain the SMC molding compound.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311835137.4A CN117777694A (en) | 2023-12-28 | 2023-12-28 | Light SMC molding compound with whole body color and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311835137.4A CN117777694A (en) | 2023-12-28 | 2023-12-28 | Light SMC molding compound with whole body color and preparation method thereof |
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| CN117777694A true CN117777694A (en) | 2024-03-29 |
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| CN202311835137.4A Pending CN117777694A (en) | 2023-12-28 | 2023-12-28 | Light SMC molding compound with whole body color and preparation method thereof |
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- 2023-12-28 CN CN202311835137.4A patent/CN117777694A/en active Pending
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