WO2022217941A1 - 用于饰品铸造的熔模铸造模料及其制备方法 - Google Patents
用于饰品铸造的熔模铸造模料及其制备方法 Download PDFInfo
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- WO2022217941A1 WO2022217941A1 PCT/CN2021/135164 CN2021135164W WO2022217941A1 WO 2022217941 A1 WO2022217941 A1 WO 2022217941A1 CN 2021135164 W CN2021135164 W CN 2021135164W WO 2022217941 A1 WO2022217941 A1 WO 2022217941A1
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- Prior art keywords
- thermoplastic elastomer
- wax
- sebs thermoplastic
- investment casting
- modified sebs
- Prior art date
Links
- 239000000463 material Substances 0.000 title claims abstract description 102
- 238000005495 investment casting Methods 0.000 title claims abstract description 94
- 238000002360 preparation method Methods 0.000 title claims abstract description 43
- 238000005266 casting Methods 0.000 title claims abstract description 25
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 claims abstract description 164
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 163
- 229920005989 resin Polymers 0.000 claims abstract description 80
- 239000011347 resin Substances 0.000 claims abstract description 80
- 239000012188 paraffin wax Substances 0.000 claims abstract description 52
- 239000004200 microcrystalline wax Substances 0.000 claims abstract description 50
- 235000019808 microcrystalline wax Nutrition 0.000 claims abstract description 50
- 239000001993 wax Substances 0.000 claims abstract description 49
- 239000002131 composite material Substances 0.000 claims abstract description 44
- -1 polypropylene Polymers 0.000 claims abstract description 39
- 239000004743 Polypropylene Substances 0.000 claims abstract description 33
- 229920001155 polypropylene Polymers 0.000 claims abstract description 33
- 239000012178 vegetable wax Substances 0.000 claims abstract description 12
- 238000002156 mixing Methods 0.000 claims abstract description 11
- 239000003208 petroleum Substances 0.000 claims description 31
- 238000003756 stirring Methods 0.000 claims description 29
- 238000000034 method Methods 0.000 claims description 26
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 23
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 23
- 239000000203 mixture Substances 0.000 claims description 22
- 239000000843 powder Substances 0.000 claims description 20
- 239000004203 carnauba wax Substances 0.000 claims description 15
- 235000013869 carnauba wax Nutrition 0.000 claims description 15
- 239000011159 matrix material Substances 0.000 claims description 12
- 239000004204 candelilla wax Substances 0.000 claims description 11
- 235000013868 candelilla wax Nutrition 0.000 claims description 11
- 229940073532 candelilla wax Drugs 0.000 claims description 11
- IUJAMGNYPWYUPM-UHFFFAOYSA-N hentriacontane Chemical compound CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC IUJAMGNYPWYUPM-UHFFFAOYSA-N 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- 229920002554 vinyl polymer Polymers 0.000 claims description 4
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims description 3
- 229920000089 Cyclic olefin copolymer Polymers 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 3
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims description 3
- 240000000111 Saccharum officinarum Species 0.000 claims description 3
- 235000007201 Saccharum officinarum Nutrition 0.000 claims description 3
- 150000001336 alkenes Chemical class 0.000 claims description 3
- 229920001400 block copolymer Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 229920006244 ethylene-ethyl acrylate Polymers 0.000 claims description 3
- 229920006225 ethylene-methyl acrylate Polymers 0.000 claims description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 claims description 3
- 239000004170 rice bran wax Substances 0.000 claims description 3
- 235000019384 rice bran wax Nutrition 0.000 claims description 3
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 abstract description 4
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 13
- 239000000155 melt Substances 0.000 description 10
- 230000035515 penetration Effects 0.000 description 10
- 238000000227 grinding Methods 0.000 description 9
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 229920006351 engineering plastic Polymers 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C7/00—Patterns; Manufacture thereof so far as not provided for in other classes
- B22C7/02—Lost patterns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D25/00—Special casting characterised by the nature of the product
- B22D25/02—Special casting characterised by the nature of the product by its peculiarity of shape; of works of art
- B22D25/026—Casting jewelry articles
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Definitions
- the invention relates to the technical field of investment precision casting, in particular to an investment casting mould material for jewelry casting and a preparation method thereof.
- the biggest feature of investment casting is that it can produce castings with complex shapes and high dimensional accuracy.
- Jewelry casting is different from ordinary investment casting.
- Jewelry products are complex in shape and have various small corners.
- the mold material also needs to have good deformation resistance. Ability and resilience.
- the investment casting process can take advantage of the fact that paraffin has no strength and is easy to engrave.
- the same paraffin material as the tomb of Zeng Houyi can be engraved, and then pouring, coating, and dewaxing are added. , pouring and other processes, you can get the tiny memorial plate of the tomb of Marquis Yi of Zeng.
- the application of this method has a long history, and it is still the main method for the production of many jewelry and handicrafts.
- an investment casting mold material for jewelry casting which has small shrinkage rate, strong toughness, high stability and moderate hardness.
- An investment casting mold material for jewelry casting in terms of mass percentage, comprises the following components: 20%-50% microcrystalline wax, 10%-30% paraffin wax, 0.5%-3% vegetable wax, 10%-20% polyalphamethylstyrene resin, 5%-15% tackifier resin, 4%-10% paste refiner, 0.5%-5% modified SEBS thermoplastic elastomer, each The total content of the components is 100%.
- the modified SEBS thermoplastic elastomer is prepared by blending and modifying SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:(2.5-3.5).
- the paste refiner is polyethylene, ethylene-acrylic acid copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer
- polyethylene ethylene-acrylic acid copolymer
- ethylene-vinyl acetate copolymer ethylene-ethyl acrylate copolymer
- ethylene-acrylic acid copolymer ethylene-methyl acrylate copolymer
- the tackifying resin is one or more combinations of C9 petroleum resin, C5/C9 copolymerized petroleum resin, C9 hydrogenated petroleum resin or hydrogenated rosin resin.
- the vegetable wax is one or more combinations of carnauba wax, candelilla wax, rice bran wax or sugar cane wax.
- the paraffin wax is one or more combinations of 58#, 60#, 62#, 64# fully refined or semi-refined paraffin wax.
- the microcrystalline wax is one or more combinations of 70#, 75#, and 80# microcrystalline waxes.
- an investment casting mold material for jewelry casting By blending and modifying SEBS thermoplastic elastomer with engineering plastics, the resistance of the investment casting mold material is improved. Impact properties, crystallization properties and low temperature toughness.
- a preparation method of investment casting mould material for ornament casting comprising the following steps:
- modified SEBS thermoplastic elastomer blending and stirring SEBS thermoplastic elastomer and polypropylene to obtain modified SEBS thermoplastic elastomer.
- Preparation of basic wax/modified SEBS thermoplastic elastomer composite material add paraffin wax and microcrystalline wax to the reaction kettle, heat and melt, then add modified SEBS thermoplastic elastomer and mix and stir until the modified SEBS thermoplastic elastomer is uniformly dispersed in the paraffin wax In the matrix of microcrystalline wax, the composite material of base wax/modified SEBS thermoplastic elastomer is obtained.
- Preparation of investment casting mold material add vegetable wax, polyalpha methyl styrene resin, tackifying resin and paste refiner to the composite material of base wax/modified SEBS thermoplastic elastomer in sequence, continue to heat, mix and stir evenly, After cooling, the investment casting mold material is obtained.
- the heating reaction temperature is 150°C-160°C.
- the heating reaction temperature is 120°C-130°C.
- the modified SEBS thermoplastic elastomer is ground into a 100 mesh powder by a ball mill.
- the invention uses paraffin wax, microcrystalline wax and modified SEBS thermoplastic elastomer as the basic composite material of the investment casting mold material, supplemented by vegetable wax, polyalpha methyl styrene resin, tackifying resin, paste refiner and other materials , making the investment casting mold material low viscosity, good fluidity, small shrinkage, strong toughness, moderate hardness, strong resistance to high and low temperature deformation, can be widely used in jewelry, handicrafts and watches and other products.
- the present application provides an investment casting mold material for jewelry casting, which, in mass percentage, comprises the following components: 20%-50% microcrystalline wax, 10%-30% paraffin wax, 0.5%-3% Vegetable wax, 10%-20% polyalphamethyl styrene resin, 5%-15% tackifying resin, 4%-10% paste refiner, 0.5%-5% modified SEBS thermoplastic elasticity
- 20%-50% microcrystalline wax 10%-30% paraffin wax, 0.5%-3% Vegetable wax, 10%-20% polyalphamethyl styrene resin, 5%-15% tackifying resin, 4%-10% paste refiner, 0.5%-5% modified SEBS thermoplastic elasticity
- the total content of each component is 100%.
- the invention uses paraffin wax, microcrystalline wax and modified SEBS thermoplastic elastomer as the basic composite material of the investment casting mold material, supplemented by vegetable wax, polyalpha methyl styrene resin, tackifying resin, paste refiner and other materials , so that the mold material has small shrinkage, strong toughness, high stability and moderate hardness, and can be widely used in jewelry, handicrafts, watches and other products; its excellent performance and low cost make the investment casting mold material prepared by the present invention. With broad market prospects, to meet the requirements of today's market.
- the modified SEBS thermoplastic elastomer is prepared by blending and modifying SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:(2.5-3.5); more preferably, SEBS thermoplastic elastomer and polypropylene The ratio of propylene is 10:3.
- SEBS thermoplastic elastomer As a new type of polymer elastomer, SEBS thermoplastic elastomer not only has high elasticity and high plasticity, but also has high thermal stability and mechanical properties. It is blended and modified with engineering plastics. Compared with SEBS thermoplastic elastomer, polypropylene itself has higher hardness, and adding it to SEBS thermoplastic elastomer can play a strengthening role. It is embodied in: (1) The compatibility of polypropylene and SEBS thermoplastic elastomer is excellent, and polypropylene can be interlaced with SEBS thermoplastic elastomer to form an inter-transmissive polymer network when added to SEBS thermoplastic elastomer.
- the polypropylene plays a supporting role, thereby resisting the external force and protecting the SEBS thermoplastic elastomer from external damage.
- the hardness and tensile strength of the modified SEBS thermoplastic elastomer increase because the addition of polypropylene will cause crystallization and hinder the destruction of the material.
- the blending modification of SEBS thermoplastic elastomer and polypropylene further improves the impact resistance, crystallinity and hardness of SEBS thermoplastic elastomer, and also solves the problems of high viscosity and poor fluidity of SEBS thermoplastic elastomer.
- the overall performance is better. Therefore, the addition of the modified SEBS thermoplastic elastomer greatly improves the shape, toughness and thermal stability of the investment casting mold material, which meets the performance requirements of the investment casting mold material for jewelry casting.
- the paraffin wax is one or more combinations of 58#, 60#, 62#, 64# fully refined or semi-refined paraffin wax.
- Paraffin is a by-product of crude oil cracking, and it is a widely used material in investment casting. Ability to change performance.
- the microcrystalline wax is one or more combinations of 70#, 75#, and 80# microcrystalline waxes.
- microcrystalline wax is also a by-product of crude oil cracking, and is a widely used material in investment casting. Compared with paraffin wax, microcrystalline wax endows the mold material with certain strength and toughness. Therefore, using the mixture of paraffin wax and microcrystalline wax as the basic wax of the investment casting mold material can provide a better foundation for the investment casting mold material. performance.
- the vegetable wax is one or more combinations of carnauba wax, candelilla wax, rice bran wax, or sugar cane wax.
- the tackifying resin is one or more combinations of C9 petroleum resin, C5/C9 copolymerized petroleum resin, C9 hydrogenated petroleum resin or hydrogenated rosin resin; its softening point is 85°C-105°C.
- the tackifying resin has high viscosity, which can improve the cohesiveness and initial viscosity of the mold material; and the tackifying resin has a high softening point, high hardness and strength, which provides the strength and hardness requirements for the injection processing of the mold material.
- Poly ⁇ methylstyrene resin is a white block or powder low molecular weight thermoplastic monomer resin with a molecular weight of 590 ⁇ 1416; its softening point is 70°C-85°C.
- the resin has good compatibility with various oils, waxes, alkyd resins, polymers and elastomers. Low melt viscosity improves initial viscosity, bonding strength and fluidity; at the same time, it also has good thermal stability and color stability, which improves the shrinkage performance of the mold material and improves the dimensional accuracy of the mold material.
- the paste refiner is polyethylene, ethylene acrylic acid copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer
- polyethylene ethylene acrylic acid copolymer, ethylene-vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ethylene-methyl acrylate copolymer
- One or more combinations of polymer, ethylene propylene diene rubber, olefin block copolymer or vinyl olefin copolymer are examples of polymer, ethylene propylene diene rubber, olefin block copolymer or vinyl olefin copolymer.
- the present application also provides a method for preparing an investment casting mold material for jewelry casting, comprising the following steps:
- modified SEBS thermoplastic elastomer blending and stirring SEBS thermoplastic elastomer and polypropylene to obtain modified SEBS thermoplastic elastomer;
- Preparation of basic wax/modified SEBS thermoplastic elastomer composite material add paraffin wax and microcrystalline wax to the reaction kettle, heat and melt, then add modified SEBS thermoplastic elastomer and mix and stir until SEBS thermoplastic elastomer in modified SEBS thermoplastic elastomer
- the elastomer and polypropylene are uniformly dispersed in the matrix of paraffin wax and microcrystalline wax to obtain the composite material of basic wax/modified SEBS thermoplastic elastomer;
- Preparation of investment casting mold material add vegetable wax, polyalpha methyl styrene resin, tackifying resin and paste refiner to the composite material of base wax/modified SEBS thermoplastic elastomer in sequence, continue to heat, mix and stir evenly, After cooling, the investment casting mold material is obtained.
- the heating reaction temperature in the process of preparing the base wax/modified SEBS thermoplastic elastomer composite material, is 150°C-160°C; in the process of preparing the investment casting mold material, the heating reaction temperature is It is 120°C-130°C.
- the modified SEBS thermoplastic elastomer is ground into a 100 mesh powder by a ball mill.
- the subsequent reaction rate can be increased to prevent the modified SEBS thermoplastic elastomer from agglomerating during the reaction.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 11.5% of 64# paraffin, 40% of 70# microcrystalline wax, and 0.5% of modified SEBS thermoplastic elastomer , 20% polyalpha methyl styrene resin, 15% C9 hydrogenated petroleum resin, 3% candelilla wax and 10% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 17.5% of 64# paraffin, 40% of 70# microcrystalline wax, and 1% of modified SEBS thermoplastic elastomer , 20% polyalpha methyl styrene resin, 10% C9 petroleum resin, 2.5% candelilla wax and 9% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 12.5% of 64# paraffin, 45% of 70# microcrystalline wax, and 1.5% of modified SEBS thermoplastic elastomer , 18% polyalpha methyl styrene resin, 12% C9 hydrogenated petroleum resin, 2% candelilla wax and 9% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 28.5% of 64# paraffin, 30% of 70# microcrystalline wax, and 2% of modified SEBS thermoplastic elastomer , 15% polyalpha methyl styrene resin, 5% C9 petroleum resin, 10% C9 hydrogenated petroleum resin, 1.5% candelilla wax and 8% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 29.5% of 64# paraffin, 35% of 70# microcrystalline wax, and 2.5% of modified SEBS thermoplastic elastomer , 15% polyalpha methyl styrene resin, 10% C9 hydrogenated petroleum resin, 1% carnauba wax and 7% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 25% of 64# paraffin wax, 45% of 70# microcrystalline wax, and 3% of modified SEBS thermoplastic elastomer , 12% polyalpha methyl styrene resin, 8% C9 hydrogenated petroleum resin, 1% carnauba wax and 6% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 30% of 64# paraffin, 40.5% of 70# microcrystalline wax, and 4% of modified SEBS thermoplastic elastomer , 10% polyalpha methyl styrene resin, 10% C9 hydrogenated petroleum resin, 0.5% carnauba wax and 5% ethylene-vinyl acetate copolymer
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 20.5% of 64# paraffin, 50% of 70# microcrystalline wax, and 5% of modified SEBS thermoplastic elastomer , 15% polyalpha methyl styrene resin, 5% C9 hydrogenated petroleum resin, 0.5% carnauba wax and 4% ethylene-vinyl acetate copolymer.
- modified SEBS thermoplastic elastomer Physically blend and stir SEBS thermoplastic elastomer and polypropylene in a mass ratio of 10:3 to obtain modified SEBS thermoplastic elastomer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 29.5% of 64# paraffin, 35% of 70# microcrystalline wax, 2.5% of SEBS thermoplastic elastomer, 15% of % polyalphamethylstyrene resin, 10% C9 hydrogenated petroleum resin, 1% carnauba wax and 7% ethylene-vinyl acetate copolymer.
- the investment casting mold material for jewelry casting in this embodiment in terms of mass percentage, includes the following components: 12% of 64# paraffin, 40% of 70# microcrystalline wax, and 20% of polyalphamethyl styrene Resin, 15% C9 Hydrogenated Petroleum Resin, 3% Carnauba Wax and 10% Ethylene Vinyl Acetate Copolymer
- the method for preparing the investment casting mold material of the present embodiment includes the following steps: adding quantitative 64# paraffin wax and 70# microcrystalline wax to the reaction kettle, heating the temperature to 120 ° C, and then adding quantitative carnauba wax, poly alpha methyl wax in sequence base styrene resin, C9 hydrogenated petroleum resin and ethylene-vinyl acetate copolymer, continue to heat, mix and stir evenly, and then cool and form to obtain an investment casting mold material.
- the softening point of the investment casting mold material prepared in Example 1 is 71.6/°C, the penetration is 0.73 at 25°C and 0.1 mm, the viscosity is 193.39 mPa.s, the linear shrinkage rate is 0.84%, and the impact strength is was 2.03 KJ/m 2 and the melt flow rate was 28.9 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 2 is 71.9 ° C, the penetration is 0.70 at 25 ° C and 0.1 mm, the viscosity is 176.41 mPa.s, the linear shrinkage rate is 0.78%, and the impact strength is 2.11 KJ/m 2 , the melt flow rate was 30.5 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 3 is 72.2 ° C, the penetration is 0.69 at 25 ° C and 0.1 mm, the viscosity is 167.94 mPa.s, the linear shrinkage rate is 0.75%, and the impact strength is 2.29 KJ/m 2 , and the melt flow rate was 32.3 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 4 is 72.5 ° C, the penetration is 0.67 at 25 ° C and 0.1 mm, the viscosity is 143.86 mPa.s, the linear shrinkage rate is 0.69%, and the impact strength is 2.37 KJ/m 2 , and the melt flow rate was 34.1 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 5 is 72.6 ° C, the penetration is 0.66 at 25 ° C and 0.1 mm, the viscosity is 121.73 mPa.s, the linear shrinkage rate is 0.65%, and the impact strength is 2.49 KJ/m 2 , the melt flow rate was 36.8 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 6 is 72.2 ° C, the penetration is 0.64 at 25 ° C and 0.1 mm, the viscosity is 136.58 mPa.s, the linear shrinkage rate is 0.62%, and the impact strength is 2.52 KJ/m 2 , the melt flow rate was 37.3 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 7 is 72.4 ° C, the penetration is 0.61 at 25 ° C and 0.1 mm, the viscosity is 161.23 mPa.s, the linear shrinkage rate is 0.78%, and the impact strength is 2.58 KJ/m 2 , the melt flow rate was 37.9 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Example 8 is 71.9 ° C, the penetration is 0.63 at 25 ° C and 0.1 mm, the viscosity is 180.15 mPa.s, the linear shrinkage rate is 0.86%, and the impact strength is 2.61 KJ/m 2 , the melt flow rate was 38.2 g/min at 60°C.
- the softening point of the investment casting mold material prepared in Comparative Example 1 is 72.5 ° C, the penetration is 0.75 at 25 ° C and 0.1 mm, the viscosity is 220.16 mPa.s, the linear shrinkage rate is 0.91%, and the impact strength is 1.88 KJ/m 2 , the melt flow rate was 25.7 g/min at 60°C.
- the investment casting mold material prepared in Comparative Example 2 has a softening point of 71.8°C, a penetration of 0.83 at 25°C and 0.1 mm, a viscosity of 200.77 mPa.s, a linear shrinkage rate of 1.24%, and an impact strength of 1.39 KJ/m 2 , the melt flow rate was 23.8 g/min at 60°C.
- the modified SEBS thermoplastic elastomer has a certain degree of improvement in various performance parameters of investment casting mold materials, with low viscosity, good toughness, moderate softening point and hardness, and shrinkage rate. It is small, can well meet the actual production and writing needs, and has high market competitiveness.
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- Oil, Petroleum & Natural Gas (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
本发明涉及一种用于饰品铸造的熔模铸造模料及其制备方法，先通过混合0.5%-5%的SEBS热塑性弹性体和聚丙烯，制得改性SEBS热塑性弹性体：再将10%-30%的石蜡、20%-50%的微晶蜡与制备改性SEBS热塑性弹性体混合，制得基础蜡/改性SEBS热塑性弹性体复合材料；最后混合0.5%-3%的植物蜡、10%-20%的聚α甲基苯乙烯树脂、5%-15%的增粘树脂和4%-10%的膏体细化剂，制得熔模铸造模料。
Description
相关申请的交叉引用
本申请要求于2021 年04月16日提交中国专利局、申请号为“202110412569.9”、发明名称为“用于饰品铸造的熔模铸造模料及其制备方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本发明涉及熔模精密铸造技术领域，特别是用于饰品铸造的熔模铸造模料及其制备方法。
熔模精密铸造的最大特点是可制作各种形状复杂的尺寸精度高的铸件。而饰品铸造区别于普通的熔模精密铸造，首饰件产品形状复杂，存在各种细小的边角，在高尺寸精度和高表面质量的性能要求的同时，还需要模料具体较好的耐变形能力和韧性。在首饰制造中，熔模精密铸造工艺可以利用石蜡没有强度、易于雕刻的特点，用普通工具就可以雕刻出与曾侯乙墓尊盘一样的石蜡材质工艺品，然后再附加浇注、涂料、脱蜡、浇注等工艺，就可以得到精美的曾侯乙墓尊盘。在金属首饰以及很多非金属工艺品的制造上，这种方法的应用源远流长，至今仍然是很多首饰和工艺品生产的主要方法。
但随着科技的不断进步，人们对金属首饰以及很多非金属工艺品的要求也越来越高，这些工件制备的复杂程度也随之加强。产品形状复杂程度的大大提高以及对尺寸精度和表面质量的提高，市面上普通的精密铸造模料已不能很好的满足首饰件的尺寸和精度的需求。
根据本申请的各种实施例，提供一种用于饰品铸造的熔模铸造模料，收缩率小，韧性强，稳定性高，硬度适中。
一种用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：20%-50%的微晶蜡、10%-30%的石蜡、0.5%-3%的植物蜡、10%-20%的聚α甲基苯乙烯树脂、5%-15%的增粘树脂、4%-10%的膏体细化剂、0.5%-5%的改性SEBS热塑性弹性体，各组分总含量为100%。
在其中一个实施例中，所述改性SEBS热塑性弹性体由SEBS热塑性弹性体和聚丙烯按质量比10:(2.5-3.5)共混改性制得。
在其中一个实施例中，所述膏体细化剂为聚乙烯、乙烯丙烯酸共聚物、乙烯—醋酸乙烯共聚物、乙烯—丙烯酸乙酯共聚物、乙烯—丙烯酸共聚物、乙烯—丙烯酸甲酯共聚物、三元乙丙橡胶、烯烃嵌段共聚物或者乙烯基烯烃共聚物中的一种或多种组合。
在其中一个实施例中，所述增粘树脂为C9石油树脂、C5/C9共聚石油树脂、C9氢化石油树脂或者氢化松香树脂的一种或多种组合。
在其中一个实施例中，所述植物蜡为巴西棕榈蜡、小烛树蜡、米糠蜡或者甘蔗蜡的一种或多种组合。
在其中一个实施例中，所述石蜡为58#、60#、62#、64#全精炼或半精炼石蜡的一种或多种组合。
在其中一个实施例中，所述微晶蜡为70#、75#、80#微晶蜡的一种或多种组合。
根据本申请的各种实施例，还提供一种用于饰品铸造的熔模铸造模料的制备方法，通过利用工程塑料对SEBS热塑性弹性体进行共混改性，提高熔模铸造模料的抗冲击性能、结晶性能与低温韧性。
一种用于饰品铸造的熔模铸造模料的制备方法，包括如下步骤：
制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯共混搅拌，获得改性SEBS热塑性弹性体。
制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入石蜡和微晶蜡，加热熔融后再加入改性SEBS热塑性弹性体共混搅拌，直至改性SEBS热塑性弹性体均匀分散于石蜡和微晶蜡的基体中，即得到基础蜡/改性SEBS热塑性弹性体的复合材料。
制备熔模铸造模料：于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入植物蜡、聚α甲基苯乙烯树脂、增粘树脂和膏体细化剂，继续加热混合搅拌均匀，冷却后即得到熔模铸造模料。
在其中一个实施例中，在制备基础蜡/改性SEBS热塑性弹性体复合材料的过程中，加热反应温度为150℃-160℃。
在其中一个实施例中，在制备熔模铸造模料的过程中，加热反应温度为120℃-130℃。
在其中一个实施例中，在制备基础蜡/改性SEBS热塑性弹性体复合材料步骤之前，改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
本发明以石蜡、微晶蜡和改性SEBS热塑性弹性体作为熔模铸造模料的基础复合材料，辅以植物蜡、聚α甲基苯乙烯树脂、增粘树脂、膏体细化剂等材料，使得熔模铸造模料粘度低、流动性好、收缩小、韧性强、硬度适中、抗高低温变形性强，可广泛应用于饰品、工艺品和钟表等产品中。
为了更好地描述和说明这里公开的那些发明的实施例和/或示例，可以参考一幅或多幅附图。用于描述附图的附加细节或示例不应当被认为是对所公开的发明、目前描述的实施例和/或示例以及目前理解的这些发明的最佳模式中的任何一者的范围的限制。
为了便于理解本发明，下面将对本发明进行更全面的描述。但是，本发明可以以许多不同的形式来实现，并不限于本文所描述的实施例。相反地，提供这些实施例的目的是使对本发明的公开内容的理解更加透彻全面。
除非另有定义，本文所使用的所有的技术和科学术语与属于本发明的技术领域的技术人员通常理解的含义相同。本文中在本发明的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本发明。
本申请提供一种用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：20%-50%的微晶蜡、10%-30%的石蜡、0.5%-3%的植物蜡、10%-20%的聚α甲基苯乙烯树脂、5%-15%的增粘树脂、4%-10%的膏体细化剂、0.5%-5%的改性SEBS热塑性弹性体，各组分总含量为100%。
本发明以石蜡、微晶蜡和改性SEBS热塑性弹性体作为熔模铸造模料的基础复合材料，辅以植物蜡、聚α甲基苯乙烯树脂、增粘树脂、膏体细化剂等材料，使得模料的收缩率小，韧性强，稳定性高，硬度适中，可广泛应用于首饰、工艺品和钟表等产品中；其优异的性能和低廉的成本使得本发明制备的熔模铸造模料具备广阔的市场前景，满足当今市场的要求。
在一个或多个实施例中，改性SEBS热塑性弹性体由SEBS热塑性弹性体和聚丙烯按质量比10:(2.5-3.5)共混改性制得；更优选地，SEBS热塑性弹性体和聚丙烯的比例为10:3。
SEBS热塑性弹性体作为新型的高分子弹性体，在兼具高弹性、高塑性的同时，还具有较高的热稳定性和力学性能。使用工程塑料对其进行共混改性，与SEBS热塑性弹性体相比，聚丙烯自身的硬度较大，加入到SEBS热塑性弹性体中可起到增强的作用。具体体现在：(1)聚丙烯与SEBS热塑性弹性体的相容性极好，聚丙烯加入到SEBS热塑性弹性体中可与之相互交错形成互传聚合网络。(2)当外界的载荷作用于改性SEBS热塑性弹性体时，聚丙烯起到支撑作用，从而抵抗外力，并保护SEBS热塑性弹性体免受外界的破坏。(3)因为聚丙烯的加入会产生结晶，阻碍材料被破坏，从而改性SEBS热塑性弹性体的硬度和拉伸强度增加。(4)聚丙烯的加入使得SEBS热塑性弹性体分子链中的自由体积减小，分子链之间的间隙变小，故分子链可以自由移动的空间变小，从而限制了SEBS热塑性弹性体分子链的伸展运动，导致改性SEBS热塑性弹性体的柔韧性降低，但SEBS热塑性弹性体和聚丙烯的比例在10:(2.5-3.5)时，其拉伸伸长率只下降15%，而硬度及拉伸强度却分别上升了近100%和150%。
综合而言，SEBS热塑性弹性体与聚丙烯共混改性进一步提高了SEBS热塑性弹性体的抗冲击性能、结晶性能及硬度，同时还解决了SEBS热塑性弹性体粘度大、流动性较差的问题，综合性能更为优异。故改性SEBS热塑性弹性体的加入，使熔模铸造模料的塑形、韧性和热稳定性等等得到了较大的提高，符合饰品铸造的熔模铸造模料的各项性能要求。
在一个或多个实施例中，石蜡为58#、60#、62#、64#全精炼或半精炼石蜡的一种或多种组合。
石蜡是原油裂解产生的副产品，是目前熔模铸造中广泛被使用的材料，其价格低廉、低粘度、低表面张力、低熔点和高熔化热，增强了模料的流动性和注射温度的流变性能的能力。
在一个或多个实施例中，微晶蜡为70#、75#、80#微晶蜡的一种或多种组合。
与石蜡相同，微晶蜡也是原油裂解产生的副产品，是目前熔模铸造中广泛被使用的材料。而微晶蜡对于相比于石蜡，赋予了模料一定的强度和韧性，因此以石蜡和微晶蜡的混合物作为熔模铸造模料的基础蜡可为熔模铸造模料提供较好的基础性能。
在一个或多个实施例中，植物蜡为巴西棕榈蜡、小烛树蜡、米糠蜡或者甘蔗蜡的一种或多种组合。
在一个或多个实施例中，增粘树脂为C9石油树脂、C5/C9共聚石油树脂、C9氢化石油树脂或者氢化松香树脂的一种或多种组合；其软化点为85℃-105℃。
由于基础蜡的粘结性差、收缩大，进而导致模料的成形质量较差。而增粘树脂粘性较大，可提高模料的粘结性和初粘性；并且增粘树脂的软化点高、硬度和强度较大，提供了模料的注射加工所需的强度和硬度要求。
聚α甲基苯乙烯树脂是一种分子量在590~1416的白色块状或粉状的低分子量热塑性单体树脂；其软化点为70℃-85℃。该树脂与各种油类、蜡类、醇酸树脂、聚合物和弹性体等都具有较好的相容性，应用于首饰模料中，在不影响粘性和粘合性能情况下可以产生较低的熔融粘度，提高初黏性、粘接强度和流动性；同时还具备较好的热稳定性及色泽稳定性，改善了模料的收缩性能，提高了模料的尺寸精度。
在一个或多个实施例中，膏体细化剂为聚乙烯、乙烯丙烯酸共聚物、乙烯—醋酸乙烯共聚物、乙烯—丙烯酸乙酯共聚物、乙烯—丙烯酸共聚物、乙烯—丙烯酸甲酯共聚物、三元乙丙橡胶、烯烃嵌段共聚物或者乙烯基烯烃共聚物中的一种或多种组合。
除此之外，本申请还提供了一种用于饰品铸造的熔模铸造模料的制备方法，包括如下步骤：
制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯共混搅拌，获得改性SEBS热塑性弹性体；
制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入石蜡和微晶蜡，加热熔融后再加入改性SEBS热塑性弹性体共混搅拌，直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于石蜡和微晶蜡的基体中，即得到基础蜡/改性SEBS热塑性弹性体的复合材料；
制备熔模铸造模料：于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入植物蜡、聚α甲基苯乙烯树脂、增粘树脂和膏体细化剂，继续加热混合搅拌均匀，冷却后即得到熔模铸造模料。
在一个或多个实施例中，在制备基础蜡/改性SEBS热塑性弹性体复合材料的过程中，加热反应温度为150℃-160℃；在制备熔模铸造模料的过程中，加热反应温度为120℃-130℃。
在一个或多个实施例中，在制备改性SEBS热塑性弹性体之后、制备基础蜡/改性SEBS热塑性弹性体复合材料步骤之前，改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。通过将改性SEBS热塑性弹性体进行研磨，可以提高后续反应速率，防止改性SEBS热塑性弹性体在反应时团聚。
以下为实施例说明。
实施例1：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：11.5%的64#石蜡、40%的70#微晶蜡、0.5%的改性SEBS热塑性弹性体、20%的聚α甲基苯乙烯树脂、15%的C9加氢石油树脂、3%的小烛树蜡及10%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至150℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至120℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的小烛树蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例2：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：17.5%的64#石蜡、40%的70#微晶蜡、1%的改性SEBS热塑性弹性体、20%的聚α甲基苯乙烯树脂、10%的C9石油树脂、2.5%的小烛树蜡及9%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至150℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至120℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的小烛树蜡、聚α甲基苯乙烯树脂、C9石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例3：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：12.5%的64#石蜡、45%的70#微晶蜡、1.5%的改性SEBS热塑性弹性体、18%的聚α甲基苯乙烯树脂、12%的C9加氢石油树脂、2%的小烛树蜡及9%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至150℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至120℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的小烛树蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例4：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：28.5%的64#石蜡、30%的70#微晶蜡、2%的改性SEBS热塑性弹性体、15%的聚α甲基苯乙烯树脂、5%的C9石油树脂、10%的C9加氢石油树脂、1.5%的小烛树蜡及8%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至150℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至120℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的小烛树蜡、聚α甲基苯乙烯树脂、C9石油树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例5：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：29.5%的64#石蜡、35%的70#微晶蜡、2.5%的改性SEBS热塑性弹性体、15%的聚α甲基苯乙烯树脂、10%的C9加氢石油树脂、1%的巴西棕榈蜡及7%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至150℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至120℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的巴西棕榈蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例6：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：25%的64#石蜡、45%的70#微晶蜡、3%的改性SEBS热塑性弹性体、12%的聚α甲基苯乙烯树脂、8%的C9加氢石油树脂、1%的巴西棕榈蜡及6%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至160℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至130℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的巴西棕榈蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例7：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：30%的64#石蜡、40.5%的70#微晶蜡、4%的改性SEBS热塑性弹性体、10%的聚α甲基苯乙烯树脂、10%的C9加氢石油树脂、0.5%的巴西棕榈蜡及5%的乙烯—醋酸乙烯共聚物
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至160℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至130℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的巴西棕榈蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
实施例8：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：20.5%的64#石蜡、50%的70#微晶蜡、5%的改性SEBS热塑性弹性体、15%的聚α甲基苯乙烯树脂、5%的C9加氢石油树脂、0.5%的巴西棕榈蜡及4%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯按质量比10:3物理共混搅拌，获得改性SEBS热塑性弹性体。
（2）研磨：将改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
（3）制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至160℃，加热熔融。再加入定量的改性SEBS热塑性弹性体粉末，搅拌直至改性SEBS热塑性弹性体中的SEBS热塑性弹性体和聚丙烯均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/改性SEBS热塑性弹性体的复合材料。
（4）制备熔模铸造模料：将反应釜中的温度降温至130℃，并于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入定量的巴西棕榈蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
对比例1：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分： 29.5%的64#石蜡、35%的70#微晶蜡、2.5%的SEBS热塑性弹性体、15%的聚α甲基苯乙烯树脂、10%的C9加氢石油树脂、1%的巴西棕榈蜡及7%的乙烯—醋酸乙烯共聚物。
制备本实施例的熔模铸造模料的方法包括如下步骤：
（1）制备基础蜡/SEBS热塑性弹性体复合材料：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至150℃，加热熔融。再加入定量的SEBS热塑性弹性体搅拌，直至SEBS热塑性弹性体均匀分散于64#石蜡和70#微晶蜡的基体中，即可得到基础蜡/SEBS热塑性弹性体的复合材料。
（2）制备熔模铸造模料：将反应釜中的温度降温至120℃，并于基础蜡/SEBS热塑性弹性体的复合材料中依次加入定量的巴西棕榈蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
对比例2：
本实施例的用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：12%的64#石蜡、40%的70#微晶蜡、20%的聚α甲基苯乙烯树脂、15%的C9加氢石油树脂、3%的巴西棕榈蜡及10%的乙烯—醋酸乙烯共聚物
制备本实施例的熔模铸造模料的方法包括如下步骤：于反应釜中加入定量的64#石蜡和70#微晶蜡，升温至120℃，再依次加入定量的巴西棕榈蜡、聚α甲基苯乙烯树脂、C9加氢石油树脂、乙烯-醋酸乙烯共聚物，继续加热混合搅拌均匀，冷却成型即可得到熔模铸造模料。
对本发明的实施例1~8和对比例1~2进行性能测试，其结果如下所示。
实施例1制得的熔模铸造模料，其软化点为71.6/℃，针入度在25℃、0.1mm时为0.73，粘度为193.39mPa.s，线收缩率为0.84%，抗冲击强度为2.03KJ/m
2，熔体流动速率在60℃为28.9g/min。
实施例2制得的熔模铸造模料，其软化点为71.9℃，针入度在25℃、0.1mm时为0.70，粘度为176.41mPa.s，线收缩率为0.78%，抗冲击强度为2.11KJ/m
2，熔体流动速率在60℃为30.5g/min。
实施例3制得的熔模铸造模料，其软化点为72.2℃，针入度在25℃、0.1mm时为0.69，粘度为167.94mPa.s，线收缩率为0.75%，抗冲击强度为2.29KJ/m
2，熔体流动速率在60℃为32.3g/min。
实施例4制得的熔模铸造模料，其软化点为72.5℃，针入度在25℃、0.1mm时为0.67，粘度为143.86mPa.s，线收缩率为0.69%，抗冲击强度为2.37KJ/m
2，熔体流动速率在60℃为34.1g/min。
实施例5制得的熔模铸造模料，其软化点为72.6℃，针入度在25℃、0.1mm时为0.66，粘度为121.73mPa.s，线收缩率为0.65%，抗冲击强度为2.49KJ/m
2，熔体流动速率在60℃为36.8g/min。
实施例6制得的熔模铸造模料，其软化点为72.2℃，针入度在25℃、0.1mm时为0.64，粘度为136.58mPa.s，线收缩率为0.62%，抗冲击强度为2.52KJ/m
2，熔体流动速率在60℃为37.3g/min。
实施例7制得的熔模铸造模料，其软化点为72.4℃，针入度在25℃、0.1mm时为0.61，粘度为161.23mPa.s，线收缩率为0.78%，抗冲击强度为2.58KJ/m
2，熔体流动速率在60℃为37.9g/min。
实施例8制得的熔模铸造模料，其软化点为71.9℃，针入度在25℃、0.1mm时为0.63，粘度为180.15mPa.s，线收缩率为0.86%，抗冲击强度为2.61KJ/m
2，熔体流动速率在60℃为38.2g/min。
对比例1制得的熔模铸造模料，其软化点为72.5℃，针入度在25℃、0.1mm时为0.75，粘度为220.16mPa.s，线收缩率为0.91%，抗冲击强度为1.88KJ/m
2，熔体流动速率在60℃为25.7g/min。
对比例2制得的熔模铸造模料，其软化点为71.8℃，针入度在25℃、0.1mm时为0.83，粘度为200.77mPa.s，线收缩率为1.24%，抗冲击强度为1.39KJ/m
2，熔体流动速率在60℃为23.8g/min。
由上述的性能测试结果可以看出，改性SEBS热塑性弹性体对于熔模铸造模料的各项性能参数指标都有一定程度的提升，其粘度低，韧性好，软化点和硬度适中，收缩率小，能够很好的满足实际生产写需求，具备较高的市场竞争力。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
以上所述实施例仅表达了本发明的一种实施方式，其描述较为具体和详细，但并不能因此而理解为对发明专利范围的限制。应当指出的是，对于本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变形和改进，这些都属于本发明的保护范围。因此，本发明专利的保护范围应以所附权利要求为准。
Claims (11)
- 一种用于饰品铸造的熔模铸造模料，以质量百分比计，包括如下组分：20%-50%的微晶蜡、10%-30%的石蜡、0.5%-3%的植物蜡、10%-20%的聚α甲基苯乙烯树脂、5%-15%的增粘树脂、4%-10%的膏体细化剂、0.5%-5%的改性SEBS热塑性弹性体，各组分总含量为100%。
- 根据权利要求1所述的熔模铸造模料，所述改性SEBS热塑性弹性体由SEBS热塑性弹性体和聚丙烯按质量比10:(2.5-3.5)共混改性制得。
- 根据权利要求1所述的熔模铸造模料，所述膏体细化剂为聚乙烯、乙烯丙烯酸共聚物、乙烯—醋酸乙烯共聚物、乙烯—丙烯酸乙酯共聚物、乙烯—丙烯酸共聚物、乙烯—丙烯酸甲酯共聚物、三元乙丙橡胶、烯烃嵌段共聚物或者乙烯基烯烃共聚物中的一种或多种组合。
- 根据权利要求1所述的熔模铸造模料，所述增粘树脂为C9石油树脂、C5/C9共聚石油树脂、C9氢化石油树脂或者氢化松香树脂的一种或多种组合。
- 根据权利要求1所述的熔模铸造模料，所述植物蜡为巴西棕榈蜡、小烛树蜡、米糠蜡或者甘蔗蜡的一种或多种组合。
- 根据权利要求1所述的熔模铸造模料，所述石蜡为58#、60#、62#、64#全精炼或半精炼石蜡的一种或多种组合。
- 根据权利要求1所述的熔模铸造模料，所述微晶蜡为70#、75#、80#微晶蜡的一种或多种组合。
- 一种用于饰品铸造的熔模铸造模料的制备方法，包括如下步骤：制备改性SEBS热塑性弹性体：将SEBS热塑性弹性体和聚丙烯共混搅拌，获得改性SEBS热塑性弹性体；制备基础蜡/改性SEBS热塑性弹性体复合材料：于反应釜中加入石蜡和微晶蜡，加热熔融后再加入改性SEBS热塑性弹性体共混搅拌，直至改性SEBS热塑性弹性体均匀分散于石蜡和微晶蜡的基体中，即得到基础蜡/改性SEBS热塑性弹性体的复合材料；制备熔模铸造模料：于基础蜡/改性SEBS热塑性弹性体的复合材料中依次加入植物蜡、聚α甲基苯乙烯树脂、增粘树脂和膏体细化剂，继续加热混合搅拌均匀，冷却后即得到熔模铸造模料。
- 根据权利要求8所述的方法，在制备基础蜡/改性SEBS热塑性弹性体复合材料的过程中，加热反应温度为150℃-160℃。
- 根据权利要求8所述的方法，在制备熔模铸造模料的过程中，加热反应温度为120℃-130℃。
- 根据权利要求8所述的方法，在制备基础蜡/改性SEBS热塑性弹性体复合材料步骤之前，改性SEBS热塑性弹性体经球磨机研磨成100目的粉末。
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