Slurry composition and preparation method therefor

Abstract

A slurry composition and a preparation method therefor. The slurry composition comprises a filler, a slurry carrier, and a dispersing agent. The slurry carrier comprises a solvent or resin. The dispersing agent is a small molecule multifunctional cross-linking dispersing agent having at least two functional groups of crosslinkable double bonds, has a higher boiling point, thermal stability, and low polarity, and has good dispersion characteristics for fillers.

Claims

1. A slurry composition, comprising: a filler; a slurry carrier comprising a solvent or resin; and a dispersing agent, wherein a structure of the dispersing agent is represented by formula (1) or formula (2): ##STR00010## in formula (1), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R2 is C1 to C6 alkyl, R3 is a functional group with a crosslinkable double bond, and n+m is a positive integer from 1 to 8, ##STR00011## in formula (2), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R3 is a functional group with a crosslinkable double bond, and a is a positive integer from 1 to 4.

2. The slurry composition according to claim 1, wherein the functional group with the crosslinkable double bond comprises allyl, vinyl, acrylate or methacrylate.

3. The slurry composition according to claim 1, wherein n+m is 2 or 3.

4. The slurry composition according to claim 1, wherein the filler comprises silica or alumina.

5. The slurry composition according to claim 1, wherein the solvent comprises acetone, butanone, cyclohexanone, ethyl acetate, toluene, propylene glycol methyl ether, isopropanol or a petroleum solvent.

6. The slurry composition according to claim 1, wherein the resin comprises epoxy resin, urethane acrylate resin, polyphenylene ether, polytetrafluoroethylene or hydrocarbon resin.

7. The slurry composition according to claim 1, wherein a content of the filler is 30 phr to 70 phr, a content of the solvent is 20 phr to 70 phr, and a content of the dispersing agent is 0.5 phr to 5.0 phr.

8. The slurry composition according to claim 1, wherein a content of the filler is 30 phr to 50 phr, a content of the resin is 40 phr to 70 phr, and a content of the dispersing agent is 0.5 phr to 2.5 phr.

9. A preparation method of a slurry composition, for preparing the slurry composition according to claim 1, the preparation method of the slurry composition comprising: mixing a filler, a slurry carrier, and a dispersing agent, wherein the slurry carrier comprises a solvent or resin; and stirring to break agglomeration of filler particles in the filler, so that the filler particles are uniformly dispersed in the slurry carrier to form the slurry composition, wherein a structure of the dispersing agent is represented by formula (1) or formula (2): ##STR00012## in formula (1), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R2 is C1 to C6 alkyl, R3 is a functional group with a crosslinkable double bond, and n+m is a positive integer from 1 to 8, ##STR00013## in formula (2), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R3 is a functional group with a crosslinkable double bond, and a is a positive integer from 1 to 4.

10. The preparation method of the slurry composition according to claim 9, wherein the functional group with the crosslinkable double bond comprises allyl, vinyl, acrylate or methacrylate.

11. The preparation method of the slurry composition according to claim 9, wherein n+m is 2 or 3.

12. The preparation method of the slurry composition according to claim 9, wherein the filler comprises silica or alumina.

13. The preparation method of the slurry composition according to claim 9, wherein the solvent comprises acetone, butanone, cyclohexanone, ethyl acetate, toluene, propylene glycol methyl ether, isopropanol or a petroleum solvent.

14. The preparation method of the slurry composition according to claim 9, wherein the resin comprises epoxy resin, urethane acrylate resin, polyphenylene ether, polytetrafluoroethylene or hydrocarbon resin.

15. The preparation method of the slurry composition according to claim 9, wherein a method of stirring comprises ball milling, double-shaft stirring or three-drum grinding.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The accompanying drawings are included to provide a further understanding of the present invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

(2) FIG. 1 is an IR spectrum of the dispersing agent according to the present invention.

DESCRIPTION OF EMBODIMENTS

(3) Hereinafter, embodiments of the present invention will be described in detail. However, these embodiments are exemplary, and the present invention is not limited thereto.

(4) As used herein, a range represented by one value to another value is a general representation that avoids listing all the values in the range in the specification. Accordingly, the recitation of a particular numerical range includes any value within that numerical range as well as a smaller numerical range bounded by any values within that numerical range, as if the any value and the smaller numerical range are written in the specification.

(5) The present invention provides a slurry composition which includes a filler, a slurry carrier, and a dispersing agent. In more detail, the filler may include silica or alumina. The slurry carrier may include a solvent or resin. The solvent may include acetone, butanone, cyclohexanone, ethyl acetate, toluene, propylene glycol methyl ether, isopropanol or a petroleum solvent. The resin may include epoxy resin, urethane acrylate resin, polyphenylene ether, polytetrafluoroethylene or hydrocarbon resin. However, the present invention is not limited thereto. In the slurry composition of the present invention, the content of the filler is, for example, 30 phr to 70 phr, the content of the solvent is, for example, 20 phr to 70 phr, and the content of the dispersing agent is, for example, 0.5 phr to 5.0 phr or the content of the filler is, for example, 30 phr to 50 phr, the content of the resin is, for example, 40 phr to 70 phr, and the content of the dispersing agent is, for example, 0.5 phr to 2.5 phr.

(6) In this embodiment, the structure of the dispersing agent can be represented by formula (1) or formula (2):

(7) ##STR00005##

(8) In formula (1), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R2 is C1 to C6 alkyl, R3 is a functional group with a crosslinkable double bond, n+m is a positive integer from 1 to 8, and n+m is preferably 2 or 3,

(9) ##STR00006##

(10) In formula (2), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R3 is a functional group with a crosslinkable double bond, and a is a positive integer from 1 to 4.

(11) FIG. 1 is an IR spectrum of the dispersing agent according to the present invention, wherein 1600 cm-1 is the characteristic signal of the double bond.

(12) In more detail, in formula (1) and formula (2), R3 is a functional group with a crosslinkable double bond. The functional group with a crosslinkable double bond may include allyl, vinyl, acrylate or methacrylate, but the present invention is not limited thereto. In addition, it should be noted that, in formula (1) and formula (2), R3 may or may not contain an oxygen atom. If R3 contains an oxygen atom, for example, an oxygen atom may be attached first, and then the functional group with a crosslinkable double bond may be attached.

(13) The present invention also provides a preparation method of a dispersing agent, which is used to prepare the above-mentioned dispersing agent represented by formula (1) and formula (2), and a synthesis reaction formula thereof is represented by reaction formula (1):

(14) ##STR00007##

(15) In reaction formula (1), X is linear or branched C1 to C6 alkyl, cycloalkyl or sulfonyl, R1 is linear or branched C1 to C6 alkyl or aryl, R2 is C1 to C6 alkyl, R3 is a functional group with a crosslinkable double bond, n+m is a positive integer from 1 to 8, n+m is preferably 2 or 3, and a is a positive integer from 1 to 4.

(16) In more detail, in reaction formula (1), R3 is a functional group with a crosslinkable double bond. The functional group with a crosslinkable double bond may include allyl, vinyl, acrylate or methacrylate, but the present invention is not limited thereto. In addition, it should be noted that, in reaction formula (1), R3 may or may not contain an oxygen atom. If R3 contains an oxygen atom, for example, an oxygen atom may be attached first, and then the functional group with a crosslinkable double bond may be attached.

(17) As shown in the above reaction formula (1), the present invention mainly utilizes a diallyl bisphenol compound with hydroxyl at both ends and a silane with at least one alkoxy at the end group and at least one functional group with a crosslinkable double bond to perform a dealcoholization reaction at a high temperature under the action of a catalyst so as to obtain the dispersing agent having a functional group with a crosslinkable double bond at the end group (that is, the dispersing agent represented by formula (1) and formula (2)).

(18) In this embodiment, the reaction temperature of reaction formula (1) is, for example, 100 C. to 180 C., preferably 130 C. to 160 C., and the reaction time is, for example, 2 hours to 15 hours. In more detail, the diallyl bisphenol compound and the silane having a functional group with a crosslinkable double bond may be placed at the bottom of a reaction tank for reaction, or the diallyl bisphenol compound may be placed at the bottom of the reaction tank and the silane having a functional group with a crosslinkable double bond may be added dropwise for reaction, and the dropwise addition time is, for example, 1 hour to 10 hours. When calculated based on the molar ratio of the hydroxyl of the diallyl bisphenol compound to the alkoxy of the dialkoxysilane having a functional group with a crosslinkable double bond, the ratio of the diallyl bisphenol compound to the dialkoxysilane having a functional group with a crosslinkable double bond is, for example, 1:0.5 to 1:4.0.

(19) In this embodiment, the amount of the catalyst in reaction formula (1) is, for example, 500 ppm to 5000 ppm relative to the weight of the diallyl bisphenol compound. The type of the catalyst may include, but not limited to, an acid catalyst, a base catalyst, a metal compound catalyst, an ester catalyst or a combination thereof. Preferably, the catalyst is, for example, ethyl triphenyl phosphine chloride (ETPPCl), ethyl triphenyl phosphine bromide (ETPPBr), ethyl triphenyl phosphine iodide (ETPPI), ethyl triphenyl phosphine acetate (ETPPAAc), tetrabutyl ammonium bromide (TBAB), triphenyl phosphine (TPP) or tetra-n-butyl ammonium acetate (TBAAc), but the present invention is not limited thereto.

(20) In reaction formula (1), the alkoxysilane having a functional group with a crosslinkable double bond used in the present invention is represented by formula (A):

(21) ##STR00008##

(22) As described above, in formula (A), R1 is linear or branched C1 to C6 alkyl or aryl, R2 is C1 to C6 alkyl, and R3 is a functional group with a crosslinkable double bond. The functional group with a crosslinkable double bond may include allyl, vinyl, acrylate or methacrylate, but the present invention is not limited thereto. In this embodiment, specific examples of formula (A) may include methylvinyldimethoxysilane, methylvinyldiethoxysilane, allylmethyldimethoxysilane, 1-allyl-2,2-dimethoxy-1,2-azasilacyclopentane or a combination thereof, but the present invention is not limited thereto. The chemical structural formulas of the specific examples are as follows:

(23) ##STR00009##

(24) Furthermore, the present invention also provides a preparation method of a slurry composition for preparing the above-mentioned slurry composition, which includes the following steps. A filler, a slurry carrier, and a dispersing agent are mixed. The slurry carrier includes a solvent or a resin, and the structure of the dispersing agent is represented by formula (1) or formula (2). Thereafter, stirring is performed to break the agglomeration of filler particles, so that the filler particles are uniformly dispersed in the slurry carrier to form the slurry composition. In more detail, a method of performing the stirring may include ball milling, double-shaft stirring or three-drum grinding, but the present invention is not limited thereto. In the present invention, the agglomeration between the filler particles is broken through the dispersing effect of the dispersing agent on the filler and stirring, thereby forming a stable slurry composition. The slurry composition can then be used as a raw material and mixed with resin glue to be processed and cured, and the pre-dispersing effect of the slurry can easily disperse the filler particles in the resin glue to facilitate processing and reduce defects due to uneven dispersion of the filler after curing. The details of the filler, solvent, resin, and structures of formula (1) and formula (2) have been described above, and therefore will not be repeated here.

(25) In this embodiment, there are two different methods for mixing and adding the filler, the slurry carrier, and the dispersing agent. The first method is to pre-dissolve the dispersing agent in the resin or solvent, and then add the filler. The second method is to pre-mix the solvent or resin with the filler, and then add the dispersing agent. After the filler, the slurry carrier, and the dispersing agent are preliminarily mixed, the mixture is sufficiently stirred to obtain the slurry of the present invention. In more detail, the stirring method may include ball milling, double-shaft stirring or three-drum grinding, but the present invention is not limited thereto.

(26) Hereinafter, the slurry composition and the preparation method thereof according to the present invention will be described in detail based on experimental examples. However, the following experimental examples are not intended to limit the present invention.

EXPERIMENTAL EXAMPLE

(27) In order to show that the slurry composition and the preparation method according to the present invention effectively exert the effects of dispersion and anti-precipitation, the following experimental examples were carried out.

Example 1

(28) The multifunctional dispersing agent of the present invention and cyclohexanone were uniformly mixed at a weight ratio of 5 phr:25 phr, and then 70 phr of a spherical silica filler without surface treatment was added. With simple stirring, the filler was initially mixed with the cyclohexanone solution containing the dispersing agent of the present invention. After the mixture was sealed, it was mixed with a double-shaft mixer (planetary mixer) under a high shear force. The stirring conditions were 2000 rpm for 10 min, followed by 2200 rpm for 2 min. After the stirring was completed, it was placed still to be cooled. The appearance of the sample was visually observed, and after being placed still for one day, the sample was inverted to observe the precipitation state at the bottom of the sample.

Comparative Example 1

(29) The preparation and measurement were performed according to the procedure of Example 1, but the weight ratio of the dispersing agent:cyclohexanone was changed to 0:30 phr.

(30) The formulation contents and observation results of Example 1 and Comparative Example 1 are shown in Table 1 below. As shown in Table 1, regarding the slurry prepared by adding the dispersing agent of the present invention in Example 1, the weight ratio of the filler could be as high as 70 wt %, and there was no obvious precipitation at the bottom of the slurry after it was placed still for one day; on the other hand, after Comparative example 1 which was not added with the dispersing agent of the present invention was placed still for one day, most of the filler settled at the bottom. It can be seen that Example 1 shows that the dispersing agent of the present invention effectively exerts the effects of dispersion and anti-precipitation in this slurry

(31) TABLE-US-00001 TABLE 1 Filler Slurry Slurry Spherical Additive appearance stability SiO.sub.2 Dispersing Observe Observe filler without agent of the visually precipitation surface Solvent present Shake after placing treatment Cyclohexanone invention manually still for one day Example 1 70 25 5 Free-flowing No or little dispersing precipitation solution Comparative 70 30 0 Free-flowing Most example 1 dispersing precipitation solution

Example 2

(32) The dispersing agent of the present invention and cyclohexanone were uniformly mixed at a weight ratio of 1.4 phr:28.6 phr, and then 70 phr of a surface-treated crushed silica filler (manufacturer: Sibelco, model: FS04ARV) was added. With simple stirring, the filler was initially mixed with the cyclohexanone solution containing the dispersing agent of the present invention. After the mixture was sealed, it was mixed with a double-shaft mixer (planetary mixer) under a high shear force. The stirring conditions were 2000 rpm for 10 min, followed by 2200 rpm for 2 min. After the stirring was completed, it was placed still to be cooled. The appearance of the sample was visually observed, and after being placed still for one day, the sample was inverted to observe the precipitation state at the bottom of the sample.

Example 2-1

(33) The preparation and measurement were performed according to the procedure of Example 2, but the order of mixing and adding the filler, the slurry carrier, and the dispersing agent was changed. Cyclohexanone and the surface-treated crushed silica filler were premixed first, and then the dispersing agent was added.

Comparative Example 2

(34) The preparation and measurement were performed according to the procedure of Example 2, but the weight ratio of the dispersing agent:cyclohexanone was changed to 0:30 phr.

(35) The formulation contents and observation results of Example 2, Example 2-1, and Comparative example 2 are shown in Table 2 below. As shown in Table 2, regarding the slurry prepared by adding the dispersing agent of the present invention in Example 2, the weight ratio of the filler could be as high as 70 wt %, and there was no obvious precipitation at the bottom of the slurry after it was placed still for one day; on the other hand, Comparative example 2 which was not added with the dispersing agent of the present invention showed a non-flowing paste after double-shaft stirring, and there were still undispersed filler agglomerates at the bottom of the sample. Example 2 shows that the dispersing agent of the present invention effectively exerts the effects of dispersion and anti-precipitation in this slurry system. In addition, the flow situation of Example 2-1 after cooling to room temperature was slower than that of Example 2, but the flow situation became the same as Example 2 after being placed for one day. Therefore, it can be seen that if the order of mixing and adding the filler, the slurry carrier, and the dispersing agent is changed, the effects of dispersion and anti-precipitation still exist, but it takes a longer time to take effect.

(36) TABLE-US-00002 TABLE 2 Slurry Slurry Additive appearance stability Dispersing Observe Observe filler agent of the visually; precipitation Filler Solvent present Shake after placing FS04ARV Cyclohexanone invention manually still for one day Example 2 70 28.6 1.4 Milky white No dispersing precipitation solution, easy to flow Example 2-1 70 28.6 1.4 After sample mixing, the flow situation after cooling to room temperature was slower than that of Example 2, but the flow situation became the same as Example 2 after being placed for one day Comparative 70 30 0 Viscous paste, no flow, with a example 2 large amount of undispersed filler agglomeration at the bottom of the sample

Example 3

(37) The dispersing agent of the present invention and bisphenol A epoxy resin (Nanya Plastics, model: NPEL128E) were uniformly mixed at a ratio of 1 phr:49 phr, and then 50 phr of a ALM-43 alumina filler (Sumitomo Chemical) was added. With simple stirring, the filler was initially mixed with the epoxy resin containing the dispersing agent of the present invention. After the mixture was sealed, it was mixed with a double-shaft mixer (planetary mixer) under a high shear force. The stirring conditions were 2000 rpm for 10 min, followed by 2200 rpm for 2 min. After the stirring was completed, it was placed still to be cooled. The appearance of the sample was visually observed, and the viscosity of the sample was measured at a constant temperature of 25 C. The sample jar was tilted to observe the flow of the sample.

Example 3-1

(38) The preparation and measurement were performed according to the procedure of Example 3, but the order of mixing and adding the filler, the slurry carrier, and the dispersing agent was changed. Bisphenol A epoxy resin and the ALM-43 alumina filler were premixed first, and then the dispersing agent was added.

Comparative Example 3

(39) The preparation and measurement were performed according to the procedure of Example 3, but the weight ratio of the dispersing agent:epoxy resin was changed to 0:50 phr.

(40) The formulation contents and observation results of Example 3, Example 3-1, and Comparative example 3 are shown in Table 3 below. As shown in Table 3, the dispersing agent of the present invention can be well compatible with epoxy resin; in the case of the same filler ratio, the dispersing agent of the present invention can effectively disperse the untreated alumina filler, thereby reducing the viscosity of the resin system and facilitating subsequent processing. Example 3 shows that the dispersing agent of the present invention effectively exerts the effects of dispersing, reducing viscosity, and improving flow characteristics in this slurry system. In addition, after Example 3-1 was heated to 40 C., the viscosity was almost the same as that of Example 3. Therefore, it can be seen that if the order of mixing and adding the filler, the slurry carrier, and the dispersing agent is changed, the effects of dispersion and anti-precipitation still exist, but the temperature needs to be raised to take effect.

(41) TABLE-US-00003 TABLE 3 Slurry Additive appearance Dispersing Observe Flow agent of visually; Characteristics 25 C. 40 C. 50 C. 60 C. Filler Solvent the present Shake Sample jar viscosity viscosity viscosity viscosity ALM43 128E invention manually tilted for 3 s cps cps cps cps Example 3 50 49 1 Viscous Smooth flow, 33,000 7,250 2,000 800 mixture, faster flowable Example 3-1 50 49 1 50,000 7,000 2,100 900 Comparative 50 50 0 Viscous Smooth flow, 48,000 11,000 3,300 1,700 example 3 mixture, slightly slower flowable

Example 4

(42) The dispersing agent of the present invention and bisphenol A epoxy resin (Nanya Plastics, model: NPEL128E) were uniformly mixed at a ratio of 1 phr:49 phr, and then 50 phr of a silica filler (Sibelco, model: G2C) was added. With simple stirring, the filler was initially mixed with the epoxy resin containing the dispersing agent of the present invention. After the mixture was sealed, it was mixed with a double-shaft mixer (planetary mixer) under a high shear force. The stirring conditions were 2000 rpm for 10 min, followed by 2200 rpm for 2 min. After the stirring was completed, it was placed still to be cooled. The appearance of the sample was visually observed, and the viscosity of the sample was measured at a constant temperature of 25 C. The sample jar was tilted to observe the flow of the sample.

Example 4-1

(43) The preparation and measurement were performed according to the procedure of Example 4, but the order of mixing and adding the filler, the slurry carrier, and the dispersing agent was changed. Bisphenol A epoxy resin and the silica filler were premixed first, and then the dispersing agent was added.

Comparative Example 4

(44) The preparation and measurement were performed according to the procedure of Example 4, but the weight ratio of the dispersing agent:epoxy resin was changed to 0:50 phr.

(45) The formulation contents and observation results of Example 4, Example 4-1, and Comparative example 4 are shown in Table 4 below. As shown in Table 4, the dispersing agent of the present invention can be well compatible with epoxy resin; in the case of the same filler ratio, the dispersing agent of the present invention can effectively disperse the untreated silica filler, thereby greatly reducing the viscosity and improving the flow characteristics of the resin system and facilitating subsequent processing. Example 4 shows that the dispersing agent of the present invention effectively exerts the effects of dispersing, reducing viscosity, and improving flow characteristics in this slurry system. In addition, after the temperature of Example 4-1 was raised, the viscosity was almost the same as that of Example 4. Therefore, it can be seen that if the order of mixing and adding the filler, the slurry carrier, and the dispersing agent is changed, the effects of dispersion and anti-precipitation still exist, but the temperature needs to be raised to take effect.

(46) TABLE-US-00004 TABLE 4 Slurry Additive appearance Dispersing Observe Flow agent of visually; Characteristics 25 C. 40 C. 50 C. 60 C. Filler Solvent the present Shake Sample jar viscosity viscosity viscosity viscosity G2C 128E invention manually tilted for 5 s cps cps cps cps Example 4 50 49 1 Viscous Slow flow, 92,000 13,000 5,500 1,900 mixture, faster flowable Example 4-1 50 49 1 134,000 12,800 5,400 2,000 Comparative 50 50 0 Viscous Slow flow, 162,000 28,000 13,250 7,000 example 4 mixture, faster flowable

Example 5

(47) The dispersing agent of the present invention and urethane acrylate resin (Double Bond Chemical Industry, model: Doublemer 553) were uniformly mixed at a ratio of 1 phr:49 phr, and then 50 phr of a silica filler (Sibelco, model: G2C) was added. With simple stirring, the filler was initially mixed with the urethane acrylate resin containing the dispersing agent of the present invention. After the mixture was sealed, it was mixed with a double-shaft mixer (planetary mixer) under a high shear force. The stirring conditions were 2000 rpm for 10 min, followed by 2200 rpm for 2 min. After the stirring was completed, it was placed still to be cooled. The appearance of the sample was visually observed, and the viscosity of the sample was measured at a constant temperature of 25 C. The sample jar was tilted to observe the flow of the sample.

Comparative Example 5

(48) The preparation and measurement were performed according to the procedure of Example 5, but the weight ratio of the dispersing agent:urethane acrylate resin was changed to 0:50 phr.

(49) The formulation contents and observation results of Example 5 and Comparative example 5 are shown in Table 5 below. As shown in Table 5, the dispersing agent of the present invention can be well compatible with the urethane acrylate resin, and in the case of the same filler ratio, the dispersing agent of the present invention can effectively disperse the untreated silica filler, thereby greatly reducing the viscosity of the resin system and improving flow characteristics for subsequent processing. Since the dispersing agent of the present invention has at least two reactive vinyl functional groups, the dispersing agent can participate in the cross-linking reaction of the urethane acrylate resin so it is especially suitable for use in UV coating systems.

(50) TABLE-US-00005 TABLE 5 Slurry Additive appearance Dispersing Observe agent of visually; 40 C. 50 C. 60 C. Filler Resin the present Shake viscosity viscosity viscosity No. G2C 553 invention manually cps cps cps Example 5 50 49 1 Uniform 1,090,000 600,000 165,000 viscous paste Comparative 50 50 0 Uniform 1,400,000 980,000 860,000 example 5 viscous paste

(51) In summary, the present invention provides a slurry composition and a preparation method thereof. The slurry composition includes a dispersing agent. The dispersing agent has at least two functional groups of crosslinkable double bonds, has a high boiling point, thermal stability, and low polarity, has good dispersion characteristics for fillers, and can be used in combination with resin to prepare a stable slurry. In more detail, the present invention breaks the agglomeration between the filler particles through the dispersing effect of the dispersing agent on the filler, and the slurry composition can be further processed and cured after being mixed with the resin glue as a raw material.

(52) The dispersing agent of the present invention has multiple double bonds that can participate in the cross-linking reaction and can be co-cross-linked with other resin containing double bonds, and has good dispersion characteristics for inorganic fillers such as silica and alumina, which can effectively increase the addition ratio of the filler in the resin glue to achieve the effect of improving dimensional stability. In addition, the molecular structure of the dispersing agent of the present invention is symmetrical and low in polarity and has good electrical properties, which is especially suitable for the requirements of high-frequency and high-speed materials. The molecular structure has a core of bisphenol A and a stable SiO chemical bond, which has certain flame retardant properties. A single molecule with four crosslinkable double bonds and two silicon atoms has excellent affinity and dispersibility for fillers. Thus, the dispersing agent of the present invention can participate in the curing and cross-linking reaction of a resin system, which makes the addition amount more flexible and solve the problems of the existing non-reactive dispersing agent. Moreover, the dispersing agent of the present invention has good compatibility with most organic solvents, and can be applied to both solvent and solvent-free systems.