CN114163764B - SMC material capable of realizing rapid solidification for automobile tail door - Google Patents
SMC material capable of realizing rapid solidification for automobile tail door Download PDFInfo
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- CN114163764B CN114163764B CN202111405567.3A CN202111405567A CN114163764B CN 114163764 B CN114163764 B CN 114163764B CN 202111405567 A CN202111405567 A CN 202111405567A CN 114163764 B CN114163764 B CN 114163764B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/08—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- Chemical Kinetics & Catalysis (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
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Abstract
The invention relates to the technical field of composite materials, in particular to an SMC material capable of realizing rapid solidification of an automobile tail door. Aiming at the problem of low production efficiency caused by low curing rate of an SMC material applied to manufacturing of automobile tail doors in the prior art, the invention provides an SMC material capable of realizing rapid curing of the automobile tail doors. The rapid-curing composite reagent is added into the automobile tail gate material, so that the curing time of the material can be greatly shortened, the production efficiency is improved, the mass production is convenient, and meanwhile, the environment-friendly reagent is added into the automobile tail gate material, so that the VOC (volatile organic compound) amount generated in the process of producing the automobile tail gate can be effectively reduced, and the environment is friendly.
Description
Technical Field
The invention relates to the technical field of composite materials, in particular to an SMC material capable of realizing rapid solidification of an automobile tail door.
Background
SMC is an English abbreviation of sheet molding compound Sheet Molding Compound, wherein the middle core material is composed of glass fiber impregnated with resin paste, the upper and lower surfaces are covered by polyethylene films, and the SMC is a raw material for manufacturing a polyester glass fiber reinforced plastic product by a dry method: wherein, the resin paste contains unsaturated polyester resin, low shrinkage additive, internal release agent, styrene, thickener and other components to form a sandwich structure. In 1953 the united states first invents chemical thickening of unsaturated polyester resins. SMC on the world market starts on a production scale around the end of the 60s, and thereafter continues to grow at 20% per year. SMC is widely applied to the industries of construction, electronics and vehicles because of excellent mechanical property, heat resistance and corrosion resistance and adaptability to various molding processes. However, the SMC materials applied to the manufacture of automotive tailgates in the prior art have a slow cure rate, resulting in lower production efficiency.
For example, chinese patent application discloses a method for preparing SMC composite material [ application number: 201610861123.3], the invention application comprises the following steps: sequentially adding 18-25 parts of unsaturated resin, 18-22 parts of low-profile shrinking agent, 6-9 parts of thermoplastic plastic, 0.4-0.6 part of auxiliary agent, 0.3-0.6 part of curing agent, 2-4 parts of internal mold release agent, 0.15-0.3 part of polymerization inhibitor, 34-38 parts of inorganic filler, 6-9 parts of PE powder and 0.8-1 part of thickener to prepare resin paste; uniformly scraping the prepared resin paste on a high-density polyethylene film, chopping 24-26 parts of glass fibers to a length of 2-3CM, uniformly dispersing the glass fibers between two films of an upper layer and a lower layer of the high-density polyethylene film, and fully soaking the resin paste and alkali-free glass fibers to form a sheet; thickening the sheet at 40-45 ℃ for 6-12 hours to obtain the SMC sheet molding compound. And (3) placing the cut SMC sheet molding compound into a mold, wherein the molding temperature of the mold is 145-155 ℃, and after the pressure is maintained for a period of time, obtaining a final product through the processes of mold closing, demolding, trimming and the like.
The SMC product obtained by this application has the advantages of low density, high mechanical properties, high gloss surface, but it does not solve the above problems.
Disclosure of Invention
The invention aims to solve the problems and provide an automobile tail gate material capable of realizing rapid curing in 60S.
The SMC material capable of realizing rapid solidification of the automobile tail door comprises SMC resin, unsaturated polyester resin, a release agent, a low shrinkage agent, an environment-friendly agent, a filler and a rapid solidification compound agent.
The release agent comprises zinc stearate.
The SMC material of the automobile tail gate capable of realizing rapid curing comprises a polymer of 2-butenoic acid and vinyl acetate and a copolymer containing acidic groups.
The SMC material for the automobile tail gate, which can realize rapid solidification, comprises superfine calcium carbonate.
In the SMC material capable of realizing rapid curing of the automobile tail gate, the environment-friendly agent comprises trimethylolpropane trimethacrylate.
In the SMC material capable of realizing rapid curing of the automobile tail gate, the environment-friendly reagent consists of trimethylolpropane trimethacrylate and lauric acid.
The SMC material for the automobile tail door capable of realizing rapid solidification comprises methyl ethyl ketone peroxide.
The SMC material capable of realizing rapid solidification of the automobile tail gate comprises tert-butyl peroxyisopropyl carbonate, methyl ethyl ketone peroxide and ethyl palmitate.
The SMC material capable of realizing rapid curing comprises, by mass, 250-350 parts of SMC resin, 50-65 parts of unsaturated polyester resin, 2-8 parts of zinc stearate, 20-30 parts of a polymer of 2-butenoic acid and vinyl acetate, 10-20 parts of an acidic group-containing copolymer, 1-5 parts of trimethylolpropane trimethacrylate, 1-2 parts of lauric acid, 160-220 parts of superfine calcium carbonate, 1-2 parts of tert-butyl peroxyisopropyl carbonate, 1-10 parts of methyl ethyl ketone peroxide and 0.5-1 part of ethyl palmitate.
The SMC material capable of realizing rapid curing comprises 300 parts of SMC resin, 57 parts of unsaturated polyester resin, 5 parts of zinc stearate, 24 parts of polymer of 2-butenoic acid and vinyl acetate, 17 parts of acid group-containing copolymer, 3 parts of trimethylolpropane trimethacrylate, 1.5 parts of lauric acid, 190 parts of superfine calcium carbonate, 1.3 parts of tert-butyl peroxyisopropyl carbonate, 5 parts of methyl ethyl ketone peroxide and 0.8 part of ethyl palmitate.
Compared with the prior art, the invention has the advantages that:
1. the rapid-curing composite reagent is added into the automobile tail gate material, so that the curing time of the material can be greatly shortened, the production efficiency is improved, and the mass production is facilitated.
2. The environment-friendly reagent is added into the automobile tail gate material provided by the invention, so that the VOC (volatile organic compound) amount generated in the use process of the produced automobile tail gate can be effectively reduced, and the environment is friendly.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
Example 1
The embodiment provides an SMC material capable of realizing rapid curing of an automobile tail gate, which comprises 250 parts of SMC resin, 65 parts of unsaturated polyester resin, 8 parts of zinc stearate, 30 parts of polymer of 2-butenoic acid and vinyl acetate, 20 parts of copolymer containing acid groups, 5 parts of trimethylolpropane trimethacrylate, 2 parts of lauric acid, 220 parts of superfine calcium carbonate, 2 parts of tert-butyl peroxyisopropyl carbonate, 10 parts of methyl ethyl ketone peroxide and 1 part of ethyl palmitate.
The SMC resin is unsaturated polyester resin, has the advantages of excellent electrical property, corrosion resistance, light weight, easy engineering design, flexibility and the like, and has mechanical properties comparable with those of partial metal materials, so that the SMC resin is widely applied to the industries of transportation vehicles, buildings, electronics/electrics and the like.
The unsaturated polyester resin is generally a linear polymer compound having an ester bond and an unsaturated double bond, which is obtained by polycondensation of an unsaturated dibasic acid and a diol or a saturated dibasic acid and an unsaturated diol. In general, the polyesterification polycondensation is carried out at 190 to 220℃until the desired acid value (or viscosity) is reached, and after the polyesterification polycondensation has ended, a certain amount of vinyl monomer is added while hot to prepare a viscous liquid, such a polymer solution being referred to as an unsaturated polyester resin. The unsaturated polyester tree in the invention can be P0423-902 type resin manufactured by Jinling Libiesi resin Co.
According to the Lewis acid-base theory, any acid can give out protons, and any base can accept protons. The copolymer contains a proton-donating group, namely an acidic group-containing copolymer. The copolymer containing acid groups can be BYK9010 type copolymer containing acid groups sold by new bridge and Teng trade in Shenzhen Baoan district.
Example 2
The embodiment provides an SMC material capable of realizing rapid curing of an automobile tail gate, which comprises, by mass, 350 parts of an SMC resin, 50 parts of an unsaturated polyester resin, 2 parts of zinc stearate, 20 parts of a polymer of 2-butenoic acid and vinyl acetate, 10 parts of an acidic group-containing copolymer, 1 part of trimethylolpropane trimethacrylate, 1 part of lauric acid, 160 parts of superfine calcium carbonate, 1 part of tert-butyl peroxyisopropyl carbonate, 1 part of methyl ethyl ketone peroxide and 0.5 part of ethyl palmitate.
Example 3
The embodiment provides an SMC material capable of realizing rapid curing of an automobile tail gate, which comprises 300 parts of SMC resin, 57 parts of unsaturated polyester resin, 5 parts of zinc stearate, 24 parts of polymer of 2-butenoic acid and vinyl acetate, 17 parts of acid group-containing copolymer, 3 parts of trimethylolpropane trimethacrylate, 1.5 parts of lauric acid, 190 parts of superfine calcium carbonate, 1.3 parts of tert-butyl peroxyisopropyl carbonate, 5 parts of methyl ethyl ketone peroxide and 0.8 part of ethyl palmitate.
Application example 1
The application example provides an SMC material which comprises 300 parts by weight of SMC resin, 57 parts by weight of unsaturated polyester resin, 5 parts by weight of zinc stearate, 24 parts by weight of polymer of 2-butenoic acid and vinyl acetate, 17 parts by weight of acid group-containing copolymer, 3 parts by weight of trimethylolpropane trimethacrylate, 1.5 parts by weight of lauric acid, 190 parts by weight of superfine calcium carbonate and 5 parts by weight of methyl ethyl ketone peroxide.
Application example 2
The application example provides an SMC material which comprises 300 parts by weight of SMC resin, 57 parts by weight of unsaturated polyester resin, 5 parts by weight of zinc stearate, 24 parts by weight of polymer of 2-butenoic acid and vinyl acetate, 17 parts by weight of acid group-containing copolymer, 3 parts by weight of trimethylolpropane trimethacrylate, 1.5 parts by weight of lauric acid, 190 parts by weight of superfine calcium carbonate and 1.3 parts by weight of tert-butyl peroxyisopropyl carbonate.
Application example 3
The application example provides an SMC material which comprises 300 parts by weight of SMC resin, 57 parts by weight of unsaturated polyester resin, 5 parts by weight of zinc stearate, 24 parts by weight of polymer of 2-butenoic acid and vinyl acetate, 17 parts by weight of acid group-containing copolymer, 3 parts by weight of trimethylolpropane trimethacrylate, 1.5 parts by weight of lauric acid, 190 parts by weight of superfine calcium carbonate and 0.8 part by weight of ethyl palmitate.
Application example 4
The application example provides an SMC material which comprises 300 parts by weight of SMC resin, 57 parts by weight of unsaturated polyester resin, 5 parts by weight of zinc stearate, 24 parts by weight of polymer of 2-butenoic acid and vinyl acetate, 17 parts by weight of acid group-containing copolymer, 3 parts by weight of trimethylolpropane trimethacrylate, 1.5 parts by weight of lauric acid, 190 parts by weight of superfine calcium carbonate, 1.3 parts by weight of tert-butyl peroxyisopropyl carbonate and 5 parts by weight of methyl ethyl ketone peroxide.
Application example 5
The application example provides an SMC material which comprises 300 parts by weight of SMC resin, 57 parts by weight of unsaturated polyester resin, 5 parts by weight of zinc stearate, 24 parts by weight of polymer of 2-butenoic acid and vinyl acetate, 17 parts by weight of acid group-containing copolymer, 3 parts by weight of trimethylolpropane trimethacrylate, 1.5 parts by weight of lauric acid, 190 parts by weight of superfine calcium carbonate, 1.3 parts by weight of tert-butyl peroxyisopropyl carbonate and 0.8 part by weight of ethyl palmitate.
Application example 6
The application example provides an SMC material which comprises 300 parts by weight of SMC resin, 57 parts by weight of unsaturated polyester resin, 5 parts by weight of zinc stearate, 24 parts by weight of polymer of 2-butenoic acid and vinyl acetate, 17 parts by weight of acid group-containing copolymer, 3 parts by weight of trimethylolpropane trimethacrylate, 1.5 parts by weight of lauric acid, 190 parts by weight of superfine calcium carbonate, 5 parts by weight of methyl ethyl ketone peroxide and 0.8 part by weight of ethyl palmitate.
Application example 7
The application example provides an SMC material which comprises, by mass, 300 parts of an SMC resin, 57 parts of an unsaturated polyester resin, 5 parts of zinc stearate, 24 parts of a polymer of 2-butenoic acid and vinyl acetate, 17 parts of an acidic group-containing copolymer, 3 parts of trimethylolpropane trimethacrylate, 190 parts of superfine calcium carbonate, 1.3 parts of tert-butyl peroxyisopropyl carbonate, 5 parts of methyl ethyl ketone peroxide and 0.8 part of ethyl palmitate.
Application example 8
The application example provides an SMC material which comprises, by mass, 300 parts of an SMC resin, 57 parts of an unsaturated polyester resin, 5 parts of zinc stearate, 24 parts of a polymer of 2-butenoic acid and vinyl acetate, 17 parts of an acidic group-containing copolymer, 1.5 parts of lauric acid, 190 parts of superfine calcium carbonate, 1.3 parts of tert-butyl peroxyisopropyl carbonate, 5 parts of methyl ethyl ketone peroxide and 0.8 part of ethyl palmitate.
Application example 1
Molding materials 1 to 7 were prepared with the material compositions described in example 3 and comparative examples 1 to 6, respectively, the molding materials 1 to 7 were molded into a mold, respectively, and a disk having a thickness of 5mm and a diameter of 50mm was press-molded at 140℃and the curing reaction times of the disks were measured, respectively, and the results are shown in the following table:
analysis of results: the experimental results show that the curing rate of the material 1 is far faster than that of the materials 2-7, so that the invention achieves the expected purposes of greatly shortening the curing time of the materials, improving the production efficiency and being convenient for mass production.
Application example 2
Molding material 1 and molding materials 8 to 9 were prepared with the material compositions described in example 3 and comparative examples 7 to 8, respectively. The automobile tail door 1, the automobile tail door 8 and the automobile tail door 9 are manufactured by using three identical mould pressing moulds as production moulds and respectively applying the mould pressing materials 1 and 8-9 to mould pressing production of identical automobile tail door products. All of the automobile tail gate 1, the automobile tail gate 8 and the automobile tail gate 9 are placed in an oven at 140 ℃ for pretreatment for 5 hours, then a 1-cube VOC emission test cabin is utilized, and VOC release of the automobile tail gate 1, the automobile tail gate 8 and the automobile tail gate 9 is detected, wherein the results are shown in the following table:
analysis of results: the experimental results show that the VOC concentration released by the automobile tail gate 1 is far lower than the VOC concentration released by the automobile tail gate 8 and the automobile tail gate 9, so that the expected aim of effectively reducing the VOC quantity generated in the use process of the produced automobile tail gate and protecting the environment is achieved.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (1)
1. An SMC material of car tail-gate that can realize quick curing, its characterized in that: the SMC material comprises 300 parts of SMC resin, 57 parts of unsaturated polyester resin, 5 parts of zinc stearate, 24 parts of polymer of 2-butenoic acid and vinyl acetate, 17 parts of acid group-containing copolymer, 3 parts of trimethylolpropane trimethacrylate, 1.5 parts of lauric acid, 190 parts of superfine calcium carbonate, 1.3 parts of tert-butyl peroxyisopropyl carbonate, 5 parts of methyl ethyl ketone peroxide and 0.8 part of ethyl palmitate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111405567.3A CN114163764B (en) | 2021-11-24 | 2021-11-24 | SMC material capable of realizing rapid solidification for automobile tail door |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111405567.3A CN114163764B (en) | 2021-11-24 | 2021-11-24 | SMC material capable of realizing rapid solidification for automobile tail door |
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| CN114163764B true CN114163764B (en) | 2023-09-29 |
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