Resin slurry and preparation method thereof, resin and application of resin in buttons

Abstract

The invention discloses a preparation method of resin slurry, which comprises the following steps: mixing o-benzene type and / or m-benzene type unsaturated polyester resin, part of reactive diluent and accelerant to prepare a first mixture with the viscosity of 700-800mPa. S; a material containing fruit powder is added, and a second mixture with the viscosity being 800-1000 mPa.s is prepared; adding the residual reactive diluent into the second mixture to prepare a third mixture with the viscosity of 700 to 900 mPa.s; and adding a curing agent into the third mixture to prepare the resin slurry. The resin slurry disclosed by the invention has excellent dispersing performance and a very good dispersing effect on biomass materials, the sedimentation rate of the biomass materials in the resin slurry is remarkably reduced, excellent processing performance is obtained, thicker resin materials and buttons are obtained under the condition of keeping excellent mechanical properties, and the buttons with unique color effects are prepared; the resin slurry can disperse more biomass materials, and is green and environment-friendly.

Description

Technical Field

[0001] The invention relates to the technical field of polymer resins, and in particular to a resin slurry and a preparation method thereof, a resin and an application thereof in buttons. Background Art

[0002] Buttons are a kind of items with practicality, decoration and artistry. The materials of buttons mainly include natural and synthetic materials. However, although natural materials have gorgeous colors, they are scarce and expensive, brittle and fragile, and cannot be widely used in the field of children's clothing. In addition, a large amount of scraps are produced during the preparation of buttons, which are difficult to reuse and cause waste of resources. Although buttons made of synthetic materials have high mechanical properties, they are not easy to degrade. After being discarded, they are easy to cause environmental pollution and are not environmentally friendly. With the increasing material living requirements of people, environmentally friendly buttons have emerged. They are prepared by natural biomass materials and degradable resins. They are green and environmentally friendly, but the dispersibility of natural materials such as plants in resins is poor, and the physical properties, chemical properties and color of the prepared buttons are difficult to meet the standards. Summary of the invention

[0003] Based on this, it is necessary to provide a resin slurry having good dispersibility for natural biomass materials and a preparation method, a resin and its application in buttons.

[0004] In a first aspect, the present invention provides a method for preparing a resin slurry, comprising the following steps:

[0005] Mixing orthophthalic and / or isophthalic unsaturated polyester resin, part of reactive diluent and accelerator to prepare a first mixed material with a viscosity of 700 mPa·s to 800 mPa·s;

[0006] Adding the material containing the fruit powder to prepare a second mixed material having a viscosity of 800 mPa·s to 1000 mPa·s;

[0007] Adding the remaining reactive diluent to the second mixed material to prepare a third mixed material having a viscosity of 700 mPa·s to 900 mPa·s;

[0008] A curing agent is added to the third mixed material to prepare a resin slurry.

[0009] In some embodiments, the resin slurry includes the following raw materials in parts by weight: 70-85 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 2-8 parts of styrene, 0.7-1.5 parts of accelerator, 0.7-1.5 parts of curing agent and 10-25 parts of material containing fruit powder.

[0010] In some embodiments, the preparation method further satisfies at least one of the following (1) to (6):

[0011] (1) The monomer diluent includes styrene and / or methylstyrene;

[0012] (2) The accelerator includes cobalt isooctoate and / or cobalt naphthenate;

[0013] (3) The curing agent includes methyl ethyl ketone peroxide and / or butanone peroxide;

[0014] (4) The material containing fruit powder includes natural fruit powder or button scraps;

[0015] (5) The powder size of the material containing fruit powder is 200 mesh - 300 mesh;

[0016] (6) The resin slurry includes raw materials in the following parts by mass: 70 - 75 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 3 - 6 parts of reactive diluent, 0.8 - 1.2 parts of accelerator, 0.8 - 1.2 parts of curing agent, and 15 - 20 parts of the material containing fruit powder.

[0017] In some embodiments, the resin slurry further includes a pigment;

[0018] Optionally, the addition amount of the pigment is 0.4wt% - 1.5wt%.

[0019] In a second aspect, the present invention also provides a resin slurry prepared by the above - described preparation method;

[0020] Optionally, the viscosity of the resin slurry is 700 mPa·s - 900 mPa·s.

[0021] In a third aspect, the present invention also provides a resin, the preparation raw materials of the resin include the above - described resin slurry, or include the resin slurry prepared by the above - described preparation method.

[0022] In a fourth aspect, the present invention also provides a method for preparing a resin, including the following steps:

[0023] Pour and cure the resin slurry on a centrifugal tablet machine, the centrifugal speed for pouring is 250 revolutions per minute - 300 revolutions per minute, the time is 20 seconds - 40 seconds, the centrifugal speed for curing is 150 revolutions per minute - 200 revolutions per minute, and the time is 25 minutes - 30 minutes to prepare the resin.

[0024] In some embodiments, pour the second layer of the resin slurry on the resin for pouring and curing to prepare the second - layer resin, and repeat the above steps until the last layer of the resin slurry is cured according to the number of layers required to prepare the resin;

[0025] Optionally, during the preparation of each layer of resin, the centrifugal speed during the pouring process of the resin slurry for the latter layer is increased by 0 to 20 revolutions per minute compared to the centrifugal speed during the pouring process of the resin slurry for the previous layer, and the time is reduced by 1 to 10 seconds.

[0026] Optionally, the centrifugal speed during the curing process of the resin slurry for the latter layer is increased by 0 to 10 revolutions per minute compared to the centrifugal speed during the curing process of the resin slurry for the previous layer, and the time is reduced by 0 to 5 minutes.

[0027] In a fifth aspect, the present invention also provides a button, and the raw materials for preparing the button include the above-mentioned resin, or the resin prepared by the above-mentioned preparation method.

[0028] In some embodiments, the resin is cut, button-turned, water-polished, polished, and laser-processed to prepare buttons.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] By mixing a material containing fruit powder with an orthophthalic and / or isophthalic unsaturated polyester resin in a certain proportion, and adding auxiliary materials such as styrene, accelerator, and curing agent within a specific content range, the present invention prepares a resin slurry with excellent dispersion performance, especially having a very good dispersion effect on the added material containing fruit powder, significantly reducing the sedimentation rate of the added material containing fruit powder in the resin slurry, enabling it to obtain excellent processing performance. Then, the resin slurry is cured to make buttons. Compared with existing ordinary buttons, the made buttons have good physical and chemical properties, especially excellent mechanical properties, being strong and not easily broken. Secondly, due to the good dispersion of the material containing fruit powder in the resin slurry and its non-settling property, excellent processing performance is obtained, and buttons with unique color effects can be realized, with distinct and natural colors. At the same time, resin materials and buttons with a thicker thickness can be obtained while maintaining excellent mechanical properties. In addition, through the combined action of the raw material ratio and the preparation process, the resin slurry of the present invention can disperse more biomass materials, achieving waste recycling, reducing the use of petrochemical materials, and conforming to the concept of sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the preparation process of the resin slurry of the present invention.

[0032] Figure 2 It is a schematic diagram of the button prepared in Example 7.

[0033] Figure 3 It is a schematic diagram of the button prepared in Example 8.

[0034] Figure 4 It is a schematic diagram of the button prepared in Example 9.

[0035] Figure 5 Schematic diagram of the button prepared in Comparative Example 4.

[0036] Figure 6 Schematic diagram of the button prepared in Comparative Example 5.

[0037] Figure 7 Schematic diagram of the button prepared in Comparative Example 6. Detailed implementation manners

[0038] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0040] It should be noted that the experimental methods without specific conditions in the following embodiments of the present invention are generally carried out under conventional conditions or according to the conditions recommended by the manufacturer. All common chemical reagents used in the embodiments are commercially available products.

[0041] In this application, in relation to "the first aspect", "the second aspect", "the third aspect", "the fourth aspect", etc., the terms "first", "second", "third", "fourth", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance or quantity, nor can they be understood as implicitly indicating the importance or quantity of the indicated technical features. Moreover, "first", "second", "third", "fourth", etc. only serve the purpose of non-exhaustive enumerative description and should be understood not to constitute a closed limitation on quantity.

[0042] In a first aspect, the present invention provides a method for preparing a resin slurry, comprising the following steps:

[0043] S10. Mix an orthophthalic and / or isophthalic unsaturated polyester resin, a partial reactive diluent, and a promoter to prepare a first mixture with a viscosity of 700 mPa·s - 800 mPa·s;

[0044] S20. Add a material containing fruit powder to prepare a second mixture with a viscosity of 800 mPa·s - 1000 mPa·s;

[0045] S30. Add the remaining reactive diluent to the second mixture to prepare a third mixture with a viscosity of 700 mPa·s - 900 mPa·s;

[0046] S40. Add a curing agent to the third mixture to prepare a resin slurry.

[0047] In the present invention, by adjusting the mixing viscosity of unsaturated polyester resin with additives such as reactive diluent, accelerator, and curing agent, good dispersion performance of biomass materials (materials containing fruit powder) in the unsaturated polyester resin is obtained, so as to reduce the sedimentation rate of biomass materials (materials containing fruit powder) in the resin slurry, thereby enabling better control of subsequent processes such as pouring and curing of the resin slurry.

[0048] In some embodiments, the orthophthalic and / or isophthalic unsaturated polyester resin, a part of the reactive diluent, and the accelerator are sequentially added and mixed to further ensure the control of the viscosity of the mixture.

[0049] In some embodiments, the orthophthalic and / or isophthalic unsaturated polyester resin, a part of the reactive diluent, and the accelerator are mixed by stirring, with a stirring speed of 200 - 400 revolutions per minute and a stirring time of 20 - 30 minutes.

[0050] In some embodiments, the material containing fruit powder is added slowly and in batches, which can further improve the dispersion of the material containing fruit powder in the mixture and reduce the caking phenomenon of the material containing fruit powder in the material.

[0051] In some embodiments, during the addition of the material containing fruit powder, a stirring speed of 400 - 500 revolutions per minute can further improve the dispersion of the material containing fruit powder in the mixture and reduce the caking phenomenon of the material containing fruit powder in the material.

[0052] In some embodiments, after the addition of the material containing fruit powder, stirring is continued for 30 - 40 minutes, which is beneficial to improving the dispersion uniformity and dispersion of the material containing fruit powder.

[0053] In the resin slurry of the present invention, within a specific content range of unsaturated polyester, reactive diluent, accelerator, and curing agent in the resin slurry, the physical and chemical properties of the resin after molding can be improved, and the content ratio of the material containing fruit powder in the resin slurry affects its dispersion uniformity and sedimentation in the resin slurry.

[0054] In some embodiments, the resin slurry comprises raw materials in the following parts by mass: 70 - 85 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 2 - 8 parts of reactive diluent, 0.7 - 1.5 parts of accelerator, 0.7 - 1.5 parts of curing agent, and 10 - 25 parts of a material containing fruit powder.

[0055] In some embodiments, the monomer diluent comprises styrene and / or methylstyrene.

[0056] In some embodiments, the accelerator comprises cobalt octoate and / or cobalt naphthenate.

[0057] In some embodiments, the curing agent comprises methyl ethyl ketone peroxide and / or butanone peroxide.

[0058] In some embodiments, the material containing fruit powder comprises natural fruit powder or button scraps. The natural fruit powder is a palm fruit from South America, and the button scraps are the remaining scraps generated after making buttons and are ground into powder by a grinder.

[0059] In some embodiments, the powder of the material containing fruit powder is 200 - 300 mesh, including but not limited to 200, 210, 220, 230, 240, 250, 260, 270, 280, 290, 300 mesh or the range formed by any two of the foregoing and any value within that range.

[0060] In some embodiments, the parts by mass of the materials charged in the steps are: 70 - 85 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 2 - 8 parts of styrene, 0.7 - 1.5 parts of accelerator, 0.4 - 1.5 parts of pigment, 0.7 - 1.5 parts of curing agent, and 10 - 20 parts of a material containing fruit powder.

[0061] In some embodiments, the resin slurry comprises raw materials in the following parts by mass: 70 - 75 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 3 - 6 parts of reactive diluent, 0.8 - 1.2 parts of accelerator, 0.8 - 1.2 parts of curing agent, and 15 - 20 parts of a material containing fruit powder.

[0062] In some embodiments, the content of orthophthalic and / or isophthalic unsaturated polyester resin in the resin slurry includes but is not limited to 70, 72, 75, 78, 80, 82, 85 parts by mass or the range formed by any two of the foregoing and any value within that range.

[0063] In some embodiments, the content of reactive diluent in the resin slurry includes but is not limited to 2, 3, 4, 5, 6, 7, 8 parts by mass or the range formed by any two of the foregoing and any value within that range.

[0064] In some embodiments, the accelerator content includes but is not limited to 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 parts by mass or the range formed by any two of the foregoing and any value within the range.

[0065] In some embodiments, the curing agent content includes but is not limited to 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.3, 1.4, 1.5 parts by mass or the range formed by any two of the foregoing and any value within the range.

[0066] In some embodiments, the content of the material containing fruit powder includes but is not limited to 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 parts by mass or the range formed by any two of the foregoing and any value within the range.

[0067] In some embodiments, the resin slurry comprises raw materials in the following parts by mass: 70 - 75 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 3 - 6 parts of styrene, 0.8 - 1.2 parts of accelerator, 0.8 - 1.2 parts of curing agent, and 15 - 20 parts of the material containing fruit powder.

[0068] In some embodiments, the resin slurry comprises the following raw material dosages: 70 - 71 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 4 - 5.5 parts of styrene, 0.9 - 1.1 parts of accelerator, 0.8 - 1.1 parts of curing agent, and 18 - 20 parts of the material containing fruit powder.

[0069] In some embodiments, the resin slurry further comprises a pigment.

[0070] In some embodiments, the pigment is added before the curing agent is added.

[0071] In some embodiments, the pigment addition amount is 0.4wt% - 1.5wt%, including but not limited to 0.4wt%, 0.5wt%, 0.6wt%, 0.8wt%, 0.9wt%, 1wt%, 1.2wt%, 1.4wt%, 1.5wt% parts by mass or the range formed by any two of the foregoing and any value within the range.

[0072] In a second aspect, the present invention also provides a resin slurry prepared by the above - mentioned preparation method.

[0073] In some embodiments, the viscosity of the resin slurry is 700 - 900 mPa·s.

[0074] The resin slurry of the present invention has good dispersibility, especially for biomass materials, such as the material containing fruit powder, with a more significant effect, enabling the biomass material to be uniformly dispersed in the resin slurry and reducing its sedimentation rate.

[0075] In a third aspect, the present invention further provides a resin, and the raw materials for preparing the resin include the above-mentioned resin slurry, or include the resin slurry prepared by the above-mentioned preparation method.

[0076] In some embodiments, the raw materials for preparing the resin further include one or more of a crosslinking agent, a stabilizer, a plasticizer, a polymerization inhibitor, and a solvent.

[0077] In a fourth aspect, the present invention further provides a method for preparing the above-mentioned resin, comprising the following steps:

[0078] Pour and cure the resin slurry on a centrifugal tablet press. The centrifugal speed for pouring is 250 - 300 revolutions per minute, and the time is 20 - 40 seconds. The centrifugal speed for curing is 150 - 200 revolutions per minute, and the time is 25 - 30 minutes to prepare the resin.

[0079] In some embodiments, pour the second layer of the resin slurry onto the above-mentioned resin for pouring and curing to prepare the second layer of resin. Repeat the above steps until the last layer of resin slurry is cured according to the number of layers required to prepare the resin.

[0080] In some embodiments, the centrifugal speed in the pouring process of the latter layer of resin slurry is increased by 0 - 20 revolutions per minute compared with that of the previous layer of resin slurry, and the time is reduced by 1 - 10 seconds.

[0081] In some embodiments, the centrifugal speed in the curing process of the latter layer of resin slurry is increased by 0 - 10 revolutions per minute compared with that of the previous layer of resin slurry, and the time is reduced by 0 - 5 minutes.

[0082] In some embodiments, the method for preparing the resin comprises the following steps:

[0083] Pour and cure the resin slurry on a centrifugal tablet press. The centrifugal speed for pouring is 250 - 300 revolutions per minute, and the time is 20 - 40 seconds. The centrifugal speed for curing is 150 - 200 revolutions per minute, and the time is 25 - 30 minutes to obtain the first layer of resin;

[0084] Pour the resin slurry onto the first layer of resin for pouring and curing, and adjust the centrifugal speed and time to obtain the second layer of resin;

[0085] Pour the resin slurry onto the second layer of resin for pouring and curing, and adjust the centrifugal speed and time to obtain the third layer of resin. According to the number of layers required, cycle according to the preparation method until the last layer of resin slurry is cured to prepare the resin.

[0086] In some embodiments, one or more steps of cooling, refrigerating, and soaking are further included in the preparation process of the resin.

[0087] In some embodiments, the cooling temperature is 20°C - 30°C.

[0088] In some embodiments, the soaking time is 8 hours - 12 hours.

[0089] In some embodiments, the thickness of each layer of the resin is 0.5 - 5 mm, including but not limited to 0.5 mm, 1 mm, 1 mm, 1.5 mm, 2 mm, 2.5 mm, 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, or any value within the range formed by any two of the foregoing and within the range.

[0090] In some embodiments, the resin slurry compositions of each layer are the same or different, including that the contents of orthophthalic and / or isophthalic unsaturated polyester resins, styrene, accelerator, curing agent, and the material containing fruit powder in the resin slurry of each layer are different, or the content of the pigment is different, but the contents of each component in the resin slurry of each layer are within the following resin slurry composition ranges.

[0091] In a fifth aspect, the present invention further provides a button, and the raw materials for preparing the button include the resin described above, or the resin prepared by the preparation method described above.

[0092] In some embodiments, the resin is cut, button-turned, water-polished, polished, and laser-processed to obtain the button.

[0093] For the experimental parameters not specified in the following specific embodiments, the guidelines given in this application document are preferably referred to, and the experimental manuals in the art or other experimental methods known in the art can also be referred to, or the experimental conditions recommended by the manufacturer can be referred to.

[0094] The raw materials and reagents involved in the following specific embodiments can be obtained commercially, or those skilled in the art can prepare them according to known means.

[0095] In the specific embodiments of the present invention, the material containing fruit powder is selected from natural fruit powder or button scraps, and the components of the natural fruit powder or button scraps are derived from palm fruits, including but not limited to ivory nuts (COROZO NUT). In specific embodiments, the natural fruit powder is selected from the powder (200 - 300 mesh) obtained by pulverizing ivory nuts (COROZO NUT); the button scraps are selected from the scraps and waste materials generated during the preparation of fruit buttons from ivory nuts (COROZO NUT), and the powder (200 - 300 mesh) obtained by pulverizing the scraps and waste materials.

[0096] In a specific embodiment of the present invention, the orthophthalic unsaturated polyester resin used is H51A-1, purchased from Xin Shuangli (Huizhou) Resin Co., Ltd.

[0097] In a specific embodiment of the present invention, the isophthalic unsaturated polyester resin used is M53V, purchased from Xin Shuangli (Huizhou) Resin Co., Ltd.

[0098] Example 1. Preparation of resin slurry

[0099] The preparation steps of the resin slurry in this example are as follows, and the raw material feeding amounts are in parts by mass:

[0100] Mix 71 parts of orthophthalic unsaturated polyester resin H51A-1, 2 parts of styrene, and 1 part of cobalt isooctoate and stir for 30 minutes at a stirring speed of 300 revolutions per minute to obtain a first mixture with a viscosity of 750 mPa·s.

[0101] Then, slowly add 20 parts of the material containing fruit powder to the first mixture in batches and stir well at a stirring speed of 400 revolutions per minute to obtain a second mixture with a viscosity of 920 mPa·s.

[0102] Add 2 parts of styrene to the second mixture, and at a stirring speed of 400 revolutions per minute, obtain a third mixture with a viscosity of 850 mPa·s. Continue to stir for 30 minutes, then add 2.5 parts of pigment and mix evenly, and send it to a vacuum machine to remove air bubbles by vacuum.

[0103] Add an appropriate amount of methyl ethyl ketone peroxide to the third mixture after vacuuming and stir for 0.5 minutes to obtain a resin slurry with a viscosity of 820 mPa·s - 840 mPa·s.

[0104] The resin slurries of different colors are prepared by the above preparation method, and the color is only affected by the chroma of the pigment.

[0105] According to the above preparation method, four resin slurries of different colors, namely red, blue, gray, and yellow, are prepared in this example. There are two parts each of red and blue, and the specific addition amounts of methyl ethyl ketone peroxide are as follows:

[0106] The addition amount of methyl ethyl ketone peroxide in the red resin slurry is 1 part by mass for the first pouring and 0.8 part by mass for the second pouring.

[0107] The addition amount of methyl ethyl ketone peroxide in the blue resin slurry is 1 part by mass for the first pouring and 0.8 part by mass for the second pouring.

[0108] The addition amount of methyl ethyl ketone peroxide in the gray resin slurry is 0.8 part by mass.

[0109] The addition amount of methyl ethyl ketone peroxide in the yellow resin slurry is 1 part by mass.

[0110] Example 2, Preparation of Resin Slurry

[0111] The preparation steps of the resin slurry in this example are as follows, and the raw material feeding amounts are in parts by mass:

[0112] Mix 70 parts of o-phthalic unsaturated polyester resin H51A-1, 2 parts of styrene, and 1 part of cobalt naphthenate and stir for 30 minutes at a stirring speed of 400 revolutions per minute to obtain a first mixture with a viscosity of 750 mPa·s.

[0113] Then slowly and in batches add 20 parts of the material containing fruit powder to the first mixture and stir well at a stirring speed of 500 revolutions per minute to obtain a second mixture with a viscosity of 920 mPa·s for the mixture.

[0114] Add 3.5 parts of styrene to the second mixture, and at a rotation speed of 500 revolutions per minute, prepare a third mixture with a viscosity of 820 mPa·s, continue to stir for 40 minutes, then add 2.5 parts of pigment and mix evenly, and send it to a vacuum machine to evacuate bubbles.

[0115] Add an appropriate amount of methyl ethyl ketone peroxide to the third mixture after vacuum evacuation and stir for 1 minute to obtain a resin slurry with a viscosity of 790 mPa·s - 810 mPa·s.

[0116] The resin slurries of different colors are prepared by the above preparation method, and the color is only affected by the chroma of the pigment.

[0117] According to the above preparation method, four resin slurries of different colors, namely red, blue, gray, and yellow, are prepared in this example. There are two parts each of red and blue. The specific addition amounts of methyl ethyl ketone peroxide are as follows:

[0118] The addition amount of methyl ethyl ketone peroxide in the red resin slurry is 1 part by mass for the first pour and 0.8 part by mass for the second pour.

[0119] The addition amount of methyl ethyl ketone peroxide in the blue resin slurry is 1 part by mass for the first pour and 0.8 part by mass for the second pour.

[0120] The addition amount of methyl ethyl ketone peroxide in the gray resin slurry is 0.8 part by mass.

[0121] The addition amount of methyl ethyl ketone peroxide in the yellow resin slurry is 1 part by mass.

[0122] Example 3, Preparation of Resin Slurry

[0123] The preparation steps of the resin slurry in this example are as follows, and the raw material feeding amounts are in parts by mass:

[0124] Mix 71 parts of m-phthalic unsaturated polyester resin M53V, 2 parts of styrene, and 1 part of cobalt naphthenate and stir for 25 minutes at a stirring speed of 350 revolutions per minute to obtain a first mixture with a viscosity of 750 mPa·s.

[0125] Then, slowly add 20 parts of the material containing fruit powder to the first mixture in batches and stir well at a stirring speed of 500 revolutions per minute to obtain a second mixture with a viscosity of 920 mPa·s.

[0126] Add 2.5 parts of styrene to the second mixture and, at a rotation speed of 500 revolutions per minute, obtain a third mixture with a viscosity of 830 mPa·s. Continue stirring for 30 minutes, then add 2.5 parts of pigment and mix evenly, and send it to a vacuum machine to evacuate air bubbles.

[0127] Add an appropriate amount of methyl ethyl ketone peroxide to the third mixture after vacuum evacuation and stir for 1 minute to obtain a resin slurry with a viscosity of 800 mPa·s - 820 mPa·s.

[0128] The resin slurries of different colors are prepared by the above preparation method, and the colors are only affected by the chroma of the pigment.

[0129] According to the above preparation method, in this example, resin slurries of four different colors, namely red, blue, gray, and yellow, are prepared. There are two parts each of red and blue. The specific addition amounts of methyl ethyl ketone peroxide are as follows:

[0130] For the red resin slurry, the addition amount of methyl ethyl ketone peroxide is 1 part by mass for the first pouring and 0.8 part by mass for the second pouring.

[0131] For the blue resin slurry, the addition amount of methyl ethyl ketone peroxide is 1 part by mass for the first pouring and 0.8 part by mass for the second pouring.

[0132] For the gray resin slurry, the addition amount of methyl ethyl ketone peroxide is 0.8 part by mass.

[0133] For the yellow resin slurry, the addition amount of methyl ethyl ketone peroxide is 1 part by mass.

[0134] Example 4. Preparation of resin blanks

[0135] The resin blanks in this example are prepared using the resin slurry prepared in Example 1, and the specific steps are as follows:

[0136] First, take 50 g of the mixed slurry and add 1 part by mass to test the curing time. A curing time between 6 - 10 minutes meets the requirements for film production.

[0137] The first layer of resin

[0138] Pour the yellow resin slurry onto a centrifugal tablet press for tablet pouring and curing. During the tablet pouring process, the centrifugal speed of the centrifugal tablet press is 280 revolutions per minute, and the tablet pouring process takes 30 seconds. Adjust the centrifugal speed to 150 revolutions per minute for curing for 20 minutes. When the surface of the resin slurry on the centrifugal tablet press is cured until there is no flow and it does not stick to the hand, the first layer of resin is obtained.

[0139] The second layer of resin

[0140] Immediately pour the red resin slurry for tablet pouring and curing after the surface of the first layer of resin is cured. During the tablet pouring process, the centrifugal speed is 280 revolutions per minute, and the tablet pouring process takes 25 seconds. Adjust the centrifugal speed to 150 revolutions per minute for curing for 18 minutes. When the surface of the resin slurry on the centrifugal tablet press is cured until there is no flow and it does not stick to the hand, the second layer of resin is obtained.

[0141] The third to sixth layers of resin

[0142] According to the above steps, pour and cure the blue resin slurry, gray resin slurry, blue resin slurry, and red resin slurry in sequence until the surface of the last layer of resin slurry is cured. The centrifugal speed and time of the centrifugal tablet press during the tablet pouring and curing process of each layer of resin slurry are as follows:

[0143] Blue resin slurry: The centrifugal speed during pouring is 290 revolutions per minute, and the time is 25 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing for 14 minutes.

[0144] Gray resin slurry: The centrifugal speed during pouring is 290 revolutions per minute, and the time is 25 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing for 12 minutes.

[0145] Blue resin slurry: The centrifugal speed during pouring is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing for 8 minutes.

[0146] Red resin slurry: The centrifugal speed during pouring is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing for 5 minutes.

[0147] In this embodiment, the thickness of the prepared resin is 24.2 mm, and the thickness of each layer of resin is about 4 mm.

[0148] After obtaining the last layer of cured resin according to the above steps, measure the surface temperature of the resin. When the temperature is 35 °C or above, turn on the cold water pipe outside the machine, and at the same time start the centrifugal speed of the centrifugal tablet press to 280 revolutions per minute. Release cold water onto the tablet, keep the cold water flowing, and at the same time suck out the water on the tablet with a rubber hose to keep the cooling water constantly updated and take away the heat. When the temperature drops below 30 °C, stop cooling and soak it in a cold water tank for 8 hours to allow the resin to gradually cool down until it cures to sufficient hardness to obtain a fully cured resin.

[0149] Example 5. Preparation of resin embryo tablets

[0150] The resin in this example is prepared using the resin slurry prepared in Example 2, and specifically includes the following steps:

[0151] First, take 50 g of the mixed slurry and add 1 part by mass to test the curing time. A curing time between 6 - 10 minutes meets the requirements for tablet production.

[0152] The first layer of resin

[0153] Pour and cure the yellow resin slurry on a centrifugal tablet press. During the pouring process, the centrifugal speed of the centrifugal tablet press is 280 revolutions per minute, and the entire process of pouring the resin slurry takes 30 seconds. Adjust the centrifugal speed to 180 revolutions per minute for curing. When the surface of the resin slurry on the centrifugal tablet press cures to the point where there is no flow and it is not sticky to the touch after 20 minutes, the first layer of resin is obtained.

[0154] The second layer of resin

[0155] Immediately pour the red resin slurry for pouring and curing when the surface of the first layer of resin cures. During the pouring process, the centrifugal speed is 280 revolutions per minute, and the pouring process takes 25 seconds. Adjust the centrifugal speed to 180 revolutions per minute for curing. When the surface of the resin slurry on the centrifugal tablet press cures to the point where there is no flow and it is not sticky to the touch after 18 minutes, the second layer of resin is obtained.

[0156] The third to sixth layers of resin

[0157] According to the above steps, pour and cure the blue resin slurry, gray resin slurry, blue resin slurry, and red resin slurry in sequence until the surface of the last layer of resin slurry cures. The centrifugal speed and time of the centrifugal tablet press during the pouring and curing process of each layer of resin slurry are as follows:

[0158] Blue resin slurry: The centrifugal speed during the pouring process is 280 revolutions per minute, and the time is 22 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing, and the time is 14 minutes.

[0159] Grey resin slurry: The centrifugal speed during pouring is 280 revolutions per minute, and the time is 22 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing, and the time is 12 minutes.

[0160] Blue resin slurry: The centrifugal speed during pouring is 290 revolutions per minute, and the time is 18 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing, and the time is 8 minutes.

[0161] Red resin slurry: The centrifugal speed during pouring is 290 revolutions per minute, and the time is 18 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing, and the time is 5 minutes.

[0162] In this embodiment, the thickness of the prepared resin is 24.2 mm, and the thickness of each layer of resin is about 4 mm.

[0163] After obtaining the last layer of cured resin according to the above steps, measure the surface temperature of the resin. When the temperature is 35°C or above, turn on the external cold water pipe of the machine. At the same time, start the centrifugal speed of the centrifugal tablet press to 280 revolutions per minute, put cold water on the tablet, keep the cold water flowing, and at the same time suck out the water on the tablet with a rubber hose to keep the cooling water constantly updated and take away the heat. When the temperature drops below 30°C, stop cooling and soak it in a cold water tank for 8 hours to let the resin gradually cool down until it cures to sufficient hardness to obtain a fully cured resin.

[0164] Example 6. Preparation of resin embryo tablets

[0165] The resin in this embodiment is prepared using the resin slurry prepared in Example 3, and specifically includes the following steps:

[0166] First, take 50 g of the mixed slurry and add 1 part by mass to test the curing time. The curing time between 6 - 10 minutes meets the requirements for tablet making.

[0167] The first layer of resin

[0168] Pour and cure the yellow resin slurry on the centrifugal tablet press. During the pouring process, the centrifugal speed of the centrifugal tablet press is 280 revolutions per minute, and the total time for pouring the resin slurry is 30 seconds. Adjust the centrifugal speed to 150 revolutions per minute for curing. When the surface of the resin slurry on the centrifugal tablet press is cured to the state where there is no flow and it does not stick to the hand after 20 minutes, the first layer of resin is obtained.

[0169] The second layer of resin

[0170] Immediately after the surface of the first layer of resin is cured, pour the red resin slurry for slicing and curing. The centrifugal speed during the slicing process is 280 revolutions per minute, and the slicing process takes 25 seconds. Adjust the centrifugal speed to 150 revolutions per minute for curing. When the surface of the resin slurry on the centrifugal tablet press is cured until there is no flow and it does not stick to the hand after 18 minutes, the second layer of resin is obtained.

[0171] The third to sixth layers of resin

[0172] According to the aforementioned steps, perform slicing and curing on the blue resin slurry, gray resin slurry, blue resin slurry, and red resin slurry in sequence until the surface of the last layer of resin slurry is cured. The centrifugal speeds and times of the centrifugal tablet press during the slicing and curing processes of each layer of resin slurry are as follows:

[0173] Blue resin slurry: The centrifugal speed during the pouring process is 290 revolutions per minute, and the time is 24 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing, and the time is 14 minutes.

[0174] Gray resin slurry: The centrifugal speed during the pouring process is 290 revolutions per minute, and the time is 24 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing, and the time is 12 minutes.

[0175] Blue resin slurry: The centrifugal speed during the pouring process is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing, and the time is 8 minutes.

[0176] Red resin slurry: The centrifugal speed during the pouring process is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing, and the time is 5 minutes.

[0177] In this embodiment, the thickness of the prepared resin is 4.2 mm, and the thickness of each layer of resin is approximately 0.7 mm.

[0178] Since the thickness of each layer is thin and the heat generation is small, there is no need for external cooling water to cool down. After curing on the machine for 25 minutes, when the surface reaches 50 - 60 Shore degrees, the whole piece is taken off and soaked in water at 80 °C for 40 minutes and then cured to obtain a fully cured resin.

[0179] Example 7. Preparation of buttons

[0180] Cut the resin obtained in Example 4 into strips with a gear cutting machine or a laser cutting machine according to a thickness of 4.2 mm (finished product thickness 3.6 mm plus 0.6 mm loss). Then lay the cut strips flat with the six-color stripes as the surface, and cut them into square button blanks with a length of 24.2 mm. The button diameter is 23 mm (diameter loss 1.2 mm). Finally, make button finished products through processing procedures such as button turning, water grinding, polishing, and laser. For details, see Figure 2Due to the combined influence of the preparation process of the resin slurry and the curing process of the resin, during the preparation of the buttons in this embodiment, the material containing fruit powder settles slowly, and the color gradient of the buttons is obvious.

[0181] Example 8: Preparation of Buttons

[0182] The resin obtained in Example 5 was cut into strips with a gear cutting machine or a laser cutting machine at a thickness of 4.2 mm (finished product thickness of 3.6 mm plus 0.6 mm loss). Then, the cut strips were laid flat with the six-color stripes as the surface, and cut into square button blanks with a length of 24.2 mm. The button diameter was 23 mm (diameter loss of 1.2 mm). Finally, the button blanks were processed through operations such as button turning, water grinding, polishing, and laser engraving to obtain the finished buttons. See details in Figure 3 Due to the combined influence of the preparation process of the resin slurry and the curing process of the resin, during the preparation of the buttons in this embodiment, the material containing fruit powder settles slightly faster, and the color gradient of the buttons is less obvious.

[0183] Example 9: Preparation of Buttons

[0184] The resin obtained in Example 6 was punched into button blanks with a finished diameter of 23 mm using a blanking machine, and cut into strips with a gear cutting machine or a laser cutting machine at a thickness of 4.2 mm (finished product thickness of 3.6 mm plus 0.6 mm loss). The button diameter was 23 mm. Finally, the button blanks were processed through operations such as button turning, water grinding, polishing, and laser engraving to obtain the finished buttons. See details in Figure 4 Due to the combined influence of the preparation process of the resin slurry and the curing process of the resin, during the preparation of the buttons in this embodiment, the material containing fruit powder settles slowly, and the color gradient of the buttons is obvious.

[0185] Test Example 1: Performance Testing of Buttons

[0186] The buttons prepared in Examples 7 - 9 were subjected to physical property tests. The test methods and results are shown in Table 1:

[0187] Table 1: Physical Property Test Methods and Results

[0188]

[0189] Comparative Example 1

[0190] The difference from Example 1 is that the raw material feeding amount and the viscosity of the mixed material of the resin slurry in this comparative example are different, as follows:

[0191] 71 parts of orthophthalic unsaturated polyester resin H51A - 1, 2 parts of styrene, and 1 part of cobalt isooctanoate were mixed and stirred for 30 minutes at a stirring speed of 300 revolutions per minute to obtain a first mixed material with a viscosity of 750 mPa·s.

[0192] Then, 10 parts of the material containing fruit powder were slowly added to the first mixture in batches and stirred thoroughly at a stirring speed of 400 revolutions per minute to obtain a second mixture with a viscosity of 870 mPa·s.

[0193] 4 parts of styrene were added to the second mixture, and at a stirring speed of 400 revolutions per minute, a third mixture with a viscosity of 680 mPa·s was obtained. Stirring continued for 30 minutes, and then 2.5 parts of pigment were added respectively and mixed evenly, and then sent to a vacuum machine to evacuate air bubbles.

[0194] The same amount of methyl ethyl ketone peroxide as in the example was added to the third mixture after vacuuming, and stirred for 0.5 minutes to obtain a resin slurry with a viscosity of 600 mPa·s - 670 mPa·s.

[0195] The remaining steps were the same as those in Example 1.

[0196] Comparative Example 2

[0197] The difference from Example 1 was that the preparation method of the resin slurry in this comparative example was different, specifically as follows:

[0198] 71 parts of m-phthalic unsaturated polyester resin M53V, 2 parts of styrene, 1 part of cobalt isooctoate, and 20 parts of the material containing fruit powder were added simultaneously and mixed and stirred for 30 minutes at a stirring speed of 300 revolutions per minute to obtain a first mixture with a viscosity of 960 mPa·s.

[0199] 2 parts of styrene were added to the first mixture, and at a speed of 300 revolutions per minute, a second mixture with a viscosity of 900 mPa·s was obtained. Stirring continued for 30 minutes, and then 2.5 parts of pigment were added and mixed evenly, and then sent to a vacuum machine to evacuate air bubbles.

[0200] An appropriate amount of methyl ethyl ketone peroxide was added to the third mixture after vacuuming, and stirred for 0.5 minutes to obtain a resin slurry with a viscosity of 850 mPa·s - 880 mPa·s.

[0201] The remaining steps were the same as those in Example 1.

[0202] Comparative Example 3

[0203] The difference from Example 4 was that the film inversion and curing processes of the resin in this comparative example were different, specifically as follows:

[0204] The first layer of resin

[0205] Pour the yellow resin slurry onto a centrifugal tablet press for pouring and curing. During the pouring process, the centrifugal speed of the centrifugal tablet press is 280 revolutions per minute, and the pouring process takes 30 seconds. Adjust the centrifugal speed to 150 revolutions per minute for curing for 16 minutes. The surface of the resin slurry on the centrifugal tablet press cures until there is no flow on the surface. When pressed with a finger, there is an obvious sticky and uncured situation, and the first layer of resin is obtained.

[0206] The second layer of resin

[0207] Immediately pour the red resin slurry for pouring and curing when there is still obvious stickiness and uncuring on the surface of the first layer of resin. During the pouring process, the centrifugal speed is 300 revolutions per minute, and the pouring process takes 20 seconds. Adjust the centrifugal speed to 150 revolutions per minute for curing for 14 minutes. The surface of the resin slurry on the centrifugal tablet press cures until there is no flow on the surface, and the second layer of resin is obtained.

[0208] The third to sixth layers of resin

[0209] According to the above steps, pour and cure the blue resin slurry, gray resin slurry, blue resin slurry, and red resin slurry in sequence until the surface of the last layer of resin slurry cures. The centrifugal speed and time of the centrifugal tablet press during the pouring and curing process of each layer of resin slurry are as follows:

[0210] Blue resin slurry: The centrifugal speed during pouring is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing for 12 minutes.

[0211] Gray resin slurry: The centrifugal speed during pouring is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 160 revolutions per minute for curing for 10 minutes.

[0212] Blue resin slurry: The centrifugal speed during pouring is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing for 8 minutes.

[0213] Red resin slurry: The centrifugal speed during pouring is 300 revolutions per minute, and the time is 20 seconds; adjust the centrifugal speed to 150 revolutions per minute for curing for 5 minutes.

[0214] In this embodiment, the thickness of the prepared resin is 24.2 mm, and the thickness of each layer of resin is about 4 mm.

[0215] After obtaining the last layer of cured resin according to the above steps, measure the surface temperature of the resin. When the temperature is 35°C or above, turn on the external cold water pipe of the machine. At the same time, start the centrifugal speed of the centrifugal tablet press to 280 revolutions per minute, release cold water onto the tablet, keep the cold water flowing, and at the same time suck out the water on the tablet with a rubber hose to keep the cooling water constantly updated and take away the heat. When the temperature drops below 30°C, stop cooling and soak it in a cold water tank for 8 hours to allow the resin to gradually cool down until it cures to sufficient hardness to obtain a fully cured resin.

[0216] Comparative Example 4

[0217] Prepare the resin from the resin slurry prepared in Comparative Example 1 according to the resin preparation method of Example 4. Then, cut the resin into strips with a gear cutting machine or a laser cutting machine at a thickness of 4.2 mm (finished product thickness of 3.6 mm plus 0.6 mm loss). Then, lay the cut strips flat with the six-color stripes facing up and cut them into square button blanks with a length of 24.2 mm. The button diameter is 23 mm (diameter loss of 1.2 mm). Finally, make the button into a finished product through processes such as button turning, water grinding, polishing, and laser engraving. See Figure 5 . Due to the combined influence of the raw material feeding amount and the preparation process of the resin slurry, during the preparation of the buttons in this comparative example, the material containing fruit powder settles quickly, and the color gradient of the buttons is not obvious.

[0218] Comparative Example 5

[0219] Prepare the resin from the resin slurry prepared in Comparative Example 2 according to the resin preparation method of Example 4. Then, cut the resin into strips with a gear cutting machine or a laser cutting machine at a thickness of 4.2 mm (finished product thickness of 3.6 mm plus 0.6 mm loss). Then, lay the cut strips flat with the six-color stripes facing up and cut them into square button blanks with a length of 24.2 mm. The button diameter is 23 mm (diameter loss of 1.2 mm). Finally, make the button into a finished product through processes such as button turning, water grinding, polishing, and laser engraving. See Figure 6 . Due to the influence of the preparation process of the resin slurry, during the preparation of the buttons in this comparative example, the viscosity of the mixture is high, the material containing fruit powder settles very slowly, and the color gradient of the buttons is not obvious.

[0220] Comparative Example 6

[0221] Cut the resin prepared in Comparative Example 3 into strips with a gear cutting machine or a laser cutting machine at a thickness of 4.2 mm (finished product thickness of 3.6 mm plus 0.6 mm loss). Then, lay the cut strips flat with the six-color stripes facing up and cut them into square button blanks with a length of 24.2 mm. The button diameter is 23 mm (diameter loss of 1.2 mm). Finally, make the button into a finished product through processes such as button turning, water grinding, polishing, and laser engraving. See Figure 7Due to the combined influence of factors such as the centrifugal speed and time during the resin slurry pouring process and the centrifugal speed and time during the curing process, the resin layers prepared in this comparative example partially penetrate each other, resulting in a lack of color gradient in the button and affecting the overall effect of the button.

[0222] Experimental Example 2: Performance Testing of Buttons

[0223] The buttons prepared in Comparative Examples 4 to 6 were subjected to physical property testing. The testing method was the same as that in Experimental Example 1, and the testing results are as follows:

[0224]

[0225] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0226] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A method for preparing a resin slurry, characterized in that: The following steps are involved: Mixing orthophthalic and / or isophthalic unsaturated polyester resin, part of reactive diluent and accelerator to prepare a first mixed material with a viscosity of 700 mPa·s to 800 mPa·s; Adding the material containing the fruit powder to prepare a second mixed material having a viscosity of 800 mPa·s to 1000 mPa·s; Adding the remaining reactive diluent to the second mixed material to prepare a third mixed material having a viscosity of 700 mPa·s to 900 mPa·s; A curing agent is added to the third mixed material to prepare a resin slurry.

2. The preparation method according to claim 1, characterized in that: The resin slurry comprises the following raw materials in parts by weight: 70-85 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 2-8 parts of active diluent, 0.7-1.5 parts of accelerator, 0.7-1.5 parts of curing agent and 10-25 parts of material containing fruit powder.

3. The preparation method according to claim 1 or 2, characterized in that: The preparation method satisfies at least one of the following (1) to (6): (1) The monomer diluent includes styrene and / or methyl styrene; (2) The promoter includes cobalt isooctanoate and / or cobalt cyclohexaneate; (3) The curing agent includes methyl ethyl ketone peroxide and / or methyl ethyl ketone peroxide; (4) The material containing fruit powder includes natural fruit powder or button scraps; (5) The powder size of the material containing fruit powder is 200-300 mesh; (6) The resin slurry comprises the following raw materials in parts by weight: 70-75 parts of orthophthalic and / or isophthalic unsaturated polyester resin, 3-6 parts of active diluent, 0.8-1.2 parts of accelerator, 0.8-1.2 parts of curing agent and 15-20 parts of material containing fruit powder.

4. The preparation method according to claim 1 or 2, characterized in that: The resin slurry also includes a pigment; Optionally, the amount of pigment added to the resin slurry is 0.4wt%-1.5wt%.

5. A resin slurry, characterized in that: The resin slurry is a resin slurry prepared by the preparation method according to any one of claims 1 to 4; Optionally, the resin slurry has a viscosity of 700 mPa·s-900 mPa·s.

6. A resin, characterized in that The raw material for preparing the resin includes the resin slurry described in claim 5, or includes the resin slurry prepared by the preparation method described in any one of claims 1 to 4.

7. A method for preparing a resin, characterized in that: The resin comprises the resin according to claim 6, comprising the following steps: The resin slurry is turned over and solidified on a centrifugal tabletting machine, the centrifugal speed of the turning over is 250 rpm-300 rpm, the time is 20 seconds-40 seconds, and the centrifugal speed of the solidification is 150 rpm-200 rpm, the time is 25 minutes-30 minutes, to prepare the resin.

8. The method for preparing the resin according to claim 7, characterized in that: Pour the second layer of the resin slurry on the resin, pour it into the film, and solidify it to prepare the second layer of resin. According to the number of layers required, repeat the steps until the last layer of resin slurry is solidified to prepare resin; Optionally, the centrifugal speed of the resin slurry pouring process of the latter layer is increased by 0 rpm-20 rpm, and the time is reduced by 0 sec-10 sec compared with the centrifugal speed of the resin slurry pouring process of the former layer; Optionally, the centrifugal speed of the resin slurry curing process of the latter layer is increased by 0 rpm-10 rpm, and the time is reduced by 0 min-5 min compared with the centrifugal speed of the resin slurry curing process of the former layer.

9. A button, characterized in that: The raw material for preparing the button includes the resin described in claim 6, or includes the resin prepared by the preparation method described in any one of claims 7 to 8.

10. The button according to claim 9, characterized in that: The resin is cut, buttoned, water-grinded, polished and laser processed to prepare buttons.

Images