阅读说明：本技术 一种含有碳氢链段及聚苯醚链段的低介电高耐热苯并噁嗪树脂及其制备方法 (Low-dielectric high-heat-resistance benzoxazine resin containing hydrocarbon chain segment and polyphenyl ether chain segment and preparation method thereof ) 是由 支肖琼 黄杰 廖曦 李欣 吴杰 于 2021-07-21 设计创作，主要内容包括：本发明公开了一种式(Ⅰ)所示的含有碳氢链段及聚苯醚链段的低介电高耐热苯并噁嗪树脂,该化合物的制备方法是：在装有搅拌器、温度计和冷凝管的反应器中,加入含双键苯并噁嗪树脂、碳氢树脂、溶剂和引发剂,升温至80～120℃,预聚30～300min；再将温度调至100～140℃,加入聚苯醚树脂、引发剂,在此温度下反应30～300min,降温,即制得。本发明制得的含有碳氢链段及聚苯醚链段的低介电高耐热苯并噁嗪树脂具有低介电常数、低介电损耗、高耐热性等特点,综合性能优异,特别适合作高频高速覆铜板用原料,也可用于层压板、集成电路封装、高密度互联网等领域。 (Ⅰ)。(The invention discloses a low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment, which is shown in a formula (I), and a preparation method of the compound comprises the following steps: adding benzoxazine resin containing double bonds, hydrocarbon resin, solvent and initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 80-120 ℃, and carrying out prepolymerization for 30-300 min; and adjusting the temperature to 100-140 ℃, adding the polyphenyl ether resin and the initiator, reacting for 30-300 min at the temperature, and cooling to obtain the catalyst. The low-dielectric high-heat-resistant benzoxazine resin containing the hydrocarbon chain segment and the polyphenyl ether chain segment has the characteristics of low dielectric constant, low dielectric loss, high heat resistance and the like, has excellent comprehensive performance, is particularly suitable for being used as a raw material for a high-frequency high-speed copper-clad plate, and can also be used for laminated plates,Integrated circuit packaging, high density internet and the like.)

1. A low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment is characterized in that: the compound has a chemical structural general formula shown in a formula (I):

（Ⅰ）

in formula (I): n is 1 to 10, R₁Is H, vinyl, allyl, or "-CH₂-、-C（CH₃）₂-、-SO₂-, -O-, -CO- "bisphenol with bridging group, double bond in benzo structure and double bond addition polymerization structure in formula (II), and double bond in benzo structure and double bond addition polymerization structure in formula (III);

R₂is phenyl, nitrobenzene, vinyl, allyl, methacryloyl, or "-CH₂-、-SO_2-"diamine which is a bridging group," addition polymerization structure of double bond on benzo structure and double bond in formula (II), "addition polymerization structure of double bond on benzo structure and double bond in formula (III");

R₃is H, allyl, an addition polymerization structure of double bonds on a benzo structure and double bonds in a formula (II) and an addition polymerization structure of double bonds on the benzo structure and double bonds in a formula (III);

（Ⅱ）

（Ⅲ）

in the formulas (II) and (III): x and y are 1-10, z is 5-20, m and n are 1-10, R₄Is H, methyl, vinyl, R₅is-CH₂-、-C（CH₃）₂-、-SO₂、-O-、-CO-，R₆H and allyl.

2. A preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment is characterized by comprising the following steps: adding 100g of double-bond-containing benzoxazine resin, 10-40 g of hydrocarbon resin, 50-80 g of solvent and 0.001-0.05 g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 80-120 ℃, and carrying out prepolymerization for 30-300 min; adjusting the temperature to 100-140 ℃, adding 10-30 g of polyphenyl ether resin and 0.005-0.05 g of initiator, reacting for 30-300 min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment;

the double-bond-containing benzoxazine resin is one or a mixture of more than two compounds with a chemical structural formula shown as a formula (IV) to a formula (VIII):

(Ⅳ)

(Ⅴ)

（Ⅵ）

(Ⅶ)

(Ⅷ)

in formulae (IV) to (VIII): r_7、R_13、R₁₈Is- (CH)₂) -n (n =0, 1), -C = O, etc.; r_8、R_14、R₁₉Is H, -CH₃Etc.; r₉Is H, C₁～C₆Alkyl, phenyl, epoxy, amino, nitro, naphthyl or cyclohexyl of (a); r₁₀Phenyl, nitrobenzene, methacryloyl and the like; r_11、R_15、R₂₃Methoxy, etc.; r_12、R_16、R₂₂Is- (CH)₂) -n (n =0, 1), etc.; r₁₇is-CH₂-、-C（CH₃）₂-、-SO₂O-, -CO-, etc.; r₂₀H, allyl; r₁₄is-CH₂-、-SO₂Etc.;

R₂₁is-CH₂-、-SO₂-, -O-, etc.;

the hydrocarbon resin is a compound with a chemical structural formula shown as the formula (II);

the polyphenyl ether resin is a compound with a chemical structural formula shown as the formula (III);

the initiator is peroxide, azo compound or redox initiator.

3. The low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segment and polyphenylene ether segment as claimed in claim 2 and its preparation method, wherein: the initiator is one or a mixture of more than two of dicumyl peroxide, di-tert-butyl peroxide, tert-butyl peroxybenzoate, dicyclohexyl peroxydicarbonate, cumene hydroperoxide and azobisisobutyronitrile.

4. The low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segment and polyphenylene ether segment as claimed in claim 2 and its preparation method, wherein: the solvent is one or a mixture of more than two of butanone, toluene, xylene, cyclohexanone, propylene glycol monomethyl ether, propylene glycol methyl ether acetate, N-dimethylformamide, N-dimethylacetamide and methyl isobutyl ketone.

5. The low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segment and polyphenylene ether segment as claimed in claim 2 and its preparation method, wherein: the double-bond-containing benzoxazine resin is any one of bisphenol S/allylamine type benzoxazine resin, p-vinylphenol/aniline type benzoxazine resin, bisphenol F/vinylaniline type benzoxazine resin and MDA/p-vinylphenol type benzoxazine resin.

6. The low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segment and polyphenylene ether segment as claimed in claim 2 and its preparation method, wherein: the hydrocarbon resin is a poly (styrene-butadiene) resin.

7. The low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segment and polyphenylene ether segment as claimed in claim 6 and its preparation method, wherein: the hydrocarbon resin is one or a mixture of two of Ricon 100, Ricon181 and Ricon 184.

8. The low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segment and polyphenylene ether segment as claimed in claim 2 and its preparation method, wherein: the polyphenylene ether resin was sapick SA 9000.

Technical Field

The invention belongs to organic compounds and preparation thereof, and relates to a low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment and a preparation method thereof. The low-dielectric high-heat-resistance benzoxazine resin containing the hydrocarbon chain segment and the polyphenyl ether chain segment has the characteristics of low dielectric constant, low dielectric loss, high heat resistance and the like, is particularly suitable for being used as a raw material for a high-frequency high-speed copper-clad plate, and can also be used in the fields of laminated plates, integrated circuit packaging, high-density internet and the like.

Background

In the beginning of 2020, the Ministry of industry and communications in China issued a notice about promoting 5G to accelerate development, and clearly provided a plurality of measures of accelerating 5G network construction and deployment, enriching 5G technology application scenes, continuously increasing 5G technology research and development strength, forcefully constructing a 5G security guarantee system, strengthening organization and implementation and the like, which marks that China first enters the 5G commercial era. 5G is becoming one of the most influential technological changes. Due to the requirements of data transmission rate, high reliability and the like of 5G communication, very high requirements on the aspects of dielectric constant, dielectric loss factor, heat resistance and the like of used laminated plates and copper-clad plates are provided. The electronic resin used as an important component of the laminated board and the copper-clad board has the key points of research on reducing the dielectric constant and the dielectric loss factor and improving the heat resistance of the electronic resin.

The benzoxazine resin is a six-membered heterocyclic compound containing C, N, O and prepared by condensing phenol, primary amine and formaldehyde, and the benzoxazine resin is subjected to ring-opening polymerization under the action of heating or a catalyst to generate a nitrogen-containing network structure similar to phenolic resin, and a cured product has the characteristics of low dielectric constant, low dielectric loss, low water absorption, high heat resistance, processing dimensional stability, good flame retardance and the like, and is one of suitable raw materials for preparing the copper-clad plate. However, the conventional benzoxazine resins such as bisphenol a type and bisphenol F type resins have slightly high dielectric constant and dielectric loss, are only suitable for pressing of common copper clad laminates, and cannot be applied to high-frequency and high-speed copper clad laminates, and therefore, people try to further develop and synthesize benzoxazine with low dielectric property.

In the prior art, documents have reported that long chain carbon chains are introduced into benzoxazine structures, and the effect of reducing dielectric constant, dielectric loss and the like is expected to be achieved by increasing the free volume of molecules, such as: the preparation method comprises the steps of preparing dodecylphenol benzoxazine resin (thermosetting resin, No. 2013), cardanol benzoxazine resin (high polymer material science and engineering, No. 2011, volume 27), nonylphenol modified benzoxazine resin (chemical and adhesion, No. 2018, volume 40) and the like, wherein carbon chain carbon atoms introduced into the structure are 6-12, and the increase of molecular free volume of benzoxazine is not obvious, so that the dielectric property of the resin after curing is not good, the heat resistance of the product is reduced along with the increase of the carbon chain, Tg is less than or equal to 140 ℃, and the application of the resin in the field of high-frequency high-speed copper clad plates is limited.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment and a preparation method thereof. The invention provides a low-dielectric and high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment and a preparation method thereof.

The content of the invention is as follows: a low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment is characterized in that: the chemical structure of the compound benzoxazine resin contains oxazine rings, and also contains reactive double bonds, hydrocarbon chain segments and polyphenyl ether chain segments, and the compound has a chemical structure general formula shown in formula (I) as follows:

in formula (I): n is 1 to 10, R₁Is H, vinyl, allyl, or "-CH₂-、-C(CH₃)₂-、-SO₂-, -O-, -CO- "bisphenol with bridging group, double bond in benzo structure and double bond addition polymerization structure in formula (II), double bond in benzo structure and double bond addition polymerization structure in formula (III), etc.;

R₂is phenyl, nitrobenzene, vinyl, allyl, methacryloyl, or "-CH₂-、-SO_2-"diamine which is a bridging group," addition polymerization structure of double bond on benzo structure and double bond in formula (II), "addition polymerization structure of double bond on benzo structure and double bond in formula (III)," and the like;

R₃h, allyl, an addition polymerization structure of a double bond on a benzo structure and a double bond in a formula (II), an addition polymerization structure of a double bond on a benzo structure and a double bond in a formula (III), and the like;

in the formulas (II) and (III): x and y are 1-10, z is 5-20, m and n are 1-10, R₄Is H, methyl, vinyl, etc., R₅is-CH₂-、-C(CH₃)₂-、-SO₂-O-, -CO-, etc., R₆H and allyl.

Another aspect of the invention is: a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment is characterized by comprising the following steps: adding 100g of double-bond-containing benzoxazine resin, 10-40 g of hydrocarbon resin, 50-80 g of solvent and 0.001-0.05 g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 80-120 ℃, and carrying out prepolymerization for 30-300 min; adjusting the temperature to 100-140 ℃, adding 10-30 g of polyphenyl ether resin and 0.005-0.05 g of initiator, reacting for 30-300 min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment;

the double-bond-containing benzoxazine resin is one or a mixture of more than two compounds with a chemical structural formula shown as a formula (IV) to a formula (VIII):

in formulae (IV) to (VIII): r_7、R_13、R₁₈Is- (CH)₂) -n (n ═ 0, 1), -C ═ O, and the like; r_8、R_14、R₁₉Is H, -CH₃Etc.; r₉Is H, C₁～C₆Alkyl, phenyl, epoxy, amino, nitro, naphthyl or cyclohexyl of (a); r₁₀Phenyl, nitrobenzene, methacryloyl and the like; r_11、R_15、R₂₃Methoxy, etc.; r_12、R_16、R₂₂Is- (CH)₂) -n (n ═ 0, 1), and the like; r₁₇is-CH₂-、-C(CH₃)₂-、-SO₂O-, -CO-, etc.; r₂₀H, allyl; r₁₄is-CH₂-、-SO₂Etc.; r₂₁is-CH₂-、-SO₂-, -O-, etc.

The hydrocarbon resin is a compound with a chemical structural formula shown as the formula (II) (product manufacturing and providing enterprises and brands can be one or a mixture of two of Ricon 100, Ricon181, Ricon 184 and the like);

the polyphenyl ether resin is a compound with a chemical structural formula shown as the formula (III) (product production providing enterprises and brands can be Saebick SA9000 and the like);

the initiator is peroxide, azo compound or redox initiator.

In another aspect of the invention: the initiator can be one or a mixture of more than two of dicumyl peroxide, di-tert-butyl peroxide, tert-butyl peroxybenzoate, dicyclohexyl peroxydicarbonate, cumene hydroperoxide and azobisisobutyronitrile.

In another aspect of the invention: the solvent is one or a mixture of more than two of butanone, toluene, xylene, cyclohexanone, propylene glycol monomethyl ether, propylene glycol methyl ether acetate, N-dimethylformamide, N-dimethylacetamide and methyl isobutyl ketone.

In another aspect of the invention: the benzoxazine resin containing double bonds is any one of bisphenol S/allylamine type benzoxazine resin (self-made), p-vinylphenol/aniline type benzoxazine resin (self-made), bisphenol F/vinylphenylamine type benzoxazine resin (self-made), and MDA (short for diaminodiphenylmethane)/p-vinylphenylphenol type benzoxazine resin (self-made).

The preparation method of the benzoxazine containing double bonds comprises the steps of adding 37% of formaldehyde solution into a three-necked bottle provided with a stirrer, a thermometer and a condenser, adjusting the pH value by using 1mol/L of NaOH solution, adding ethanol, and uniformly stirring, wherein the adding amount of the ethanol is 4 times of that of the formaldehyde solution. Then adding primary amine compound in batches, controlling the molar ratio of the amine group to the formaldehyde at 1:2.1, and controlling the reaction temperature to be not more than 30 ℃. After the reaction is finished in batches, the reaction is maintained for 10min, and then the phenolic compound is added, wherein the molar ratio of the phenolic hydroxyl group to the amino group is 1: 1. The reaction mixture was heated to reflux temperature, and the reaction was maintained for 4 hours, and the heating was stopped. And taking the resin layer, and removing the solvent by using a rotary evaporator to obtain the benzoxazine resin containing double bonds.

In another aspect of the invention: the hydrocarbon resin is a poly styrene-butadiene resin, and the product production and provision enterprises and the brands can be one or a mixture of two of Clevix Ricon 100, Ricon181, Ricon 184 and the like.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

(1) by adopting the preparation method, the benzoxazine resin containing double bonds is adopted in the preparation of the low-dielectric and high-heat-resistance benzoxazine resin containing the hydrocarbon chain segment and the polyphenyl ether chain segment, the double bonds in the molecular structure can be used as reaction active points to introduce other high-performance resins containing double bonds, and the crosslinking points can be increased in the resin curing process, so that the resin crosslinking density is improved, and the heat resistance of the product is further improved;

(2) according to the invention, in the low-dielectric and high-heat-resistance benzoxazine resin containing the hydrocarbon chain segment and the polyphenyl ether chain segment, phenolic hydroxyl and double bonds in the benzoxazine structure react with double bonds of the hydrocarbon resin, so that more hydrocarbon chain segments are added in the whole structure, the dielectric constant and the dielectric loss of the product are low, and in addition, hydrocarbon containing a large number of benzene ring structures is selected, so that the benzoxazine resin has good heat resistance;

(3) the low-dielectric and high-heat-resistance benzoxazine resin containing the hydrocarbon chain segment and the polyphenyl ether chain segment is subjected to double bond in a benzoxazine structure and double bond introduced by the hydrocarbon resin after being pre-polymerized with the hydrocarbon resin, and the two double bonds react with terminal double bonds in the polyphenyl ether to introduce polyether bond, so that the dielectric constant and the dielectric loss of the benzoxazine resin are further reduced, and the heat resistance is further improved due to a large number of benzene ring structures;

(4) the low-dielectric and high-heat-resistant benzoxazine resin containing the hydrocarbon chain segment and the polyphenyl ether chain segment has the following properties: the dielectric constant is less than or equal to 2.90(1 MHz); the dielectric loss is less than or equal to 0.004(1 MHz); the heat resistance Td5 percent is more than or equal to 370 ℃, and the Tg is more than or equal to 230 ℃; the resin has the characteristics of low dielectric constant, low dielectric loss and high glass transition temperature, has excellent comprehensive performance, and can be used as resin for a high-performance copper-clad plate;

(5) the product of the invention has simple preparation process, good product performance and strong practicability.

Detailed Description

The following examples are intended to further illustrate the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims appended hereto.

Example 1:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of bisphenol S/allylamine type benzoxazine resin, 20g of poly (styrene-butadiene) resin (Ricon 100), 70g of xylene and 0.01g of dicumyl peroxide into a reactor provided with a stirrer, a thermometer and a condenser, heating to 120 ℃, prepolymerizing for 60min, slightly cooling to 110 ℃, adding 20g of polyphenylene ether resin (SA9000) and 0.02g of dicumyl peroxide, reacting for 150min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenylene ether chain segment, wherein the low-dielectric high-heat-resistant benzoxazine resin is a reddish brown transparent liquid, the solid content is 66.7%, and the chemical structure is as shown in the following formula (9):

in formula (9): x, y, m, n are 1-10, z is 5-20.

Example 2:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of p-vinylphenol/aniline benzoxazine resin, 20g of poly (styrene-butadiene) resin (Ricon 184), 80g of ethylene glycol monomethyl ether and 0.02g of tert-butyl peroxybenzoate into a reactor provided with a stirrer, a thermometer and a condenser, heating to 100 ℃, prepolymerizing for 60min, heating to 120 ℃, adding 20g of polyphenylene ether resin (SA9000) and 0.02g of tert-butyl peroxybenzoate, reacting for 150min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenylene ether chain segment, wherein the benzoxazine resin is a red-brown transparent liquid, the solid content is 64%, and the chemical structure is as follows (10):

in formula (10): x, y, m, n are 1-10, z is 5-20.

Example 3:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of bisphenol F/vinyl aniline benzoxazine resin, 30g of poly (styrene-butadiene) resin (Ricon181), 50g of cyclohexanone and 0.01g of tert-butyl peroxybenzoate into a reactor provided with a stirrer, a thermometer and a condenser, heating to 120 ℃, prepolymerizing for 60min, slightly cooling to 100 ℃, adding 30g of polyphenylene ether resin (SA9000) and 0.01g of benzoyl peroxide, reacting for 120min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenylene ether chain segment, wherein the benzoxazine resin is a red-brown transparent liquid, the solid content is 76.2%, and the chemical structure is as shown in the following formula (11):

in formula (11): x, y, m, n are 1-10, z is 5-20.

Example 4:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of MDA/p-vinylphenol benzoxazine resin, 40g of poly (styrene-butadiene) resin (Ricon 100), 70g of toluene and 0.02g of dicyclohexyl peroxydicarbonate into a reactor provided with a stirrer, a thermometer and a condenser, heating to 100 ℃, prepolymerizing for 3min, heating to 140 ℃, adding 10g of polyphenylene ether resin (SA9000) and 0.005g of dicyclohexyl peroxydicarbonate, reacting for 200min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenylene ether chain segment, wherein the benzoxazine resin is a red-brown transparent liquid, the solid content is 71.4%, and the chemical structure is as shown in the following formula (12):

in formula (12): x, y, m, n are 1-10, z is 5-20.

The technical properties of the low-dielectric and high-heat-resistant benzoxazine resin part containing the hydrocarbon chain segment and the polyphenyl ether chain segment prepared in the embodiment of the invention are shown in the following table 1:

table 1: examples 1-4 resin Performance results Table:

the low dielectric and high heat-resistant benzoxazine resin containing hydrocarbon chain segments and polyphenyl ether chain segments prepared in the embodiment of the invention and the benzoxazine resin in the comparative example are cured according to the procedures of 140 ℃ for 1 hour, 160 ℃ for 1 hour, 180 ℃ for 1 hour and 200 ℃ for 2 hours to prepare a casting body of 50mm multiplied by 0.8mm, and part of the technical performance comparison conditions of the tested casting body are shown in the following table 2:

table 2: examples 1-4 cast body performance results are shown in the table:

comparative examples 1 and 2 are data of performance tests of outsourced long chain benzoxazine resin castings.

The technical performance test methods in table 2 are as follows:

(1) dielectric constant

The dielectric constant at 1MHz was measured by the plate method according to IPC-TM-650, 2.5.5.9.

(2) Dielectric loss tangent

The dielectric loss tangent at 1MHz was measured by the plate method according to IPC-TM-650, 2.5.5.9.

(3) Glass transition temperature (Tg)

According to differential scanning calorimetry, the measurement was carried out according to the DSC method defined by 2.4.25 in IPC-TM-650.

(4) Thermal decomposition temperature (Td)

The measurement was carried out according to the method defined in IPC-TM-650, 2.4.26.

As can be seen from table 2, the low dielectric benzoxazine resin having hydrocarbon segments and polyphenylene ether segments obtained by applying the examples of the present invention has excellent heat resistance, a low dielectric constant and a low dielectric loss tangent. The resin can be used in the fields of laminated boards, integrated circuit packaging, high-frequency high-speed copper-clad plates, high-density internet and the like, and has wide application prospect.

Example 5:

a low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment, wherein the chemical structure of the compound benzoxazine resin contains an oxazine ring, a reactive double bond, the hydrocarbon chain segment and the polyphenyl ether chain segment, and the compound has a chemical structure general formula shown in a formula (I) as follows:

in formula (I): n is 1 to 10, R₁Is H, vinyl, allyl, or "-CH₂-、-C(CH₃)₂-、-SO₂A bisphenol in which-O-, -CO- "is a bridging group, an addition polymerization structure of a double bond on a benzo structure and a double bond in the formula (II), an addition polymerization structure of a double bond on a benzo structure and a double bond in the formula (III), and the like;

R₂is phenyl, nitrobenzene, vinyl, allyl, methacryloyl, or "-CH₂-、-SO_2-"diamine which is a bridging group," addition polymerization structure of double bond on benzo structure and double bond in formula (II), "addition polymerization structure of double bond on benzo structure and double bond in formula (III)," and the like;

R₃h, allyl, an addition polymerization structure of a double bond on a benzo structure and a double bond in a formula (II), an addition polymerization structure of a double bond on a benzo structure and a double bond in a formula (III), and the like;

in the formulas (II) and (III): x and y are 1-10, z is 5-20, m and n are 1-10, R₄Is H, methyl, vinyl, etc., R₅is-CH₂-、-C(CH₃)₂-、-SO₂-O-, -CO-, etc., R₆H and allyl.

Example 6:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of double-bond-containing benzoxazine resin, 40g of hydrocarbon resin, 80g of solvent and 0.05g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 120 ℃, and carrying out prepolymerization for 30 min; and then adjusting the temperature to 140 ℃, adding 30g of polyphenyl ether resin and 0.05g of initiator, reacting for 30min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment.

Example 7:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of double-bond-containing benzoxazine resin, 10g of hydrocarbon resin, 50g of solvent and 0.001g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 80 ℃, and carrying out prepolymerization for 300 min; and adjusting the temperature to 100 ℃, adding 10g of polyphenyl ether resin and 0.005g of initiator, reacting for 300min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment.

Example 8:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of double-bond-containing benzoxazine resin, 25g of hydrocarbon resin, 65g of solvent and 0.025g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 100 ℃, and carrying out prepolymerization for 160 min; and then adjusting the temperature to 120 ℃, adding 20g of polyphenyl ether resin and 0.025g of initiator, reacting for 160min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment.

Example 9:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of double-bond-containing benzoxazine resin, 18g of hydrocarbon resin, 60g of solvent and 0.015g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 90 ℃, and carrying out prepolymerization for 80 min; and then adjusting the temperature to 110 ℃, adding 16g of polyphenyl ether resin and 0.015g of initiator, reacting for 90min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment.

Example 10:

a preparation method of low-dielectric high-heat-resistance benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment comprises the following steps: adding 100g of double-bond-containing benzoxazine resin, 32g of hydrocarbon resin, 72g of solvent and 0.035g of initiator into a reactor provided with a stirrer, a thermometer and a condenser, heating to 110 ℃, and carrying out prepolymerization for 200 min; and then adjusting the temperature to 130 ℃, adding 26g of polyphenyl ether resin and 0.035g of initiator, reacting for 200min at the temperature, and cooling to obtain the low-dielectric high-heat-resistant benzoxazine resin containing a hydrocarbon chain segment and a polyphenyl ether chain segment.

In examples 6 to 10 above:

the double-bond-containing benzoxazine resin is one or a mixture of more than two compounds with a chemical structural formula shown as a formula (IV) to a formula (VIII):

in formulae (IV) to (VIII): r_7、R_13、R₁₈Is- (CH)₂) -n (n ═ 0, 1), -C ═ O, and the like; r_8、R_14、R₁₉Is H, -CH₃Etc.; r₉Is H, C₁～C₆Alkyl, phenyl, epoxy, amino, nitro, naphthyl or cyclohexyl of (a); r₁₀Phenyl, nitrobenzene, methacryloyl and the like; r_11、R_15、R₂₃Methoxy, etc.; r_12、R_16、R₂₂Is- (CH)₂) -n (n ═ 0, 1), and the like; r₁₇is-CH₂-、-C(CH₃)₂-、-SO₂O-, -CO-, etc.; r₂₀H, allyl; r₁₄is-CH₂-、-SO₂Etc.; r₂₁is-CH₂-、-SO₂-, -O-, etc.

The hydrocarbon resin is a compound with a chemical structural formula shown in the formula (II) (product production and supply enterprises and brands can be one or a mixture of two of Clevix Ricon 100, Ricon 184, Ricon181 and the like);

the polyphenyl ether resin is a compound with a chemical structural formula shown as the formula (III) (product production and supply enterprises and brands can be Saebick SA9000 and the like);

the initiator is peroxide, azo compound or redox initiator, and is specifically one or a mixture of more than two of dicumyl peroxide, di-tert-butyl peroxide, tert-butyl peroxybenzoate, dicyclohexyl peroxydicarbonate, cumene hydroperoxide and azobisisobutyronitrile;

the solvent is one or a mixture of more than two of butanone, toluene, xylene, cyclohexanone, propylene glycol monomethyl ether, propylene glycol methyl ether acetate, N-dimethylformamide, N-dimethylacetamide and methyl isobutyl ketone.

The invention and the above embodiments: the double-bond-containing benzoxazine resin is any one of bisphenol S/allylamine type benzoxazine resin (self-made), p-vinylphenol/aniline type benzoxazine resin (self-made), bisphenol F/vinylphenylamine type benzoxazine resin (self-made), and MDA (short for diaminodiphenylmethane)/p-vinylphenylphenol type benzoxazine resin (self-made).

The preparation method of the benzoxazine containing double bonds comprises the steps of adding 37% of formaldehyde solution into a three-necked bottle provided with a stirrer, a thermometer and a condenser, adjusting the pH value by using 1mol/L of NaOH solution, adding ethanol, and uniformly stirring, wherein the adding amount of the ethanol is 4 times of that of the formaldehyde solution. Then adding primary amine compound in batches, controlling the molar ratio of the amine group to the formaldehyde at 1:2.1, and controlling the reaction temperature to be not more than 30 ℃. After the reaction is finished in batches, the reaction is maintained for 10min, and then the phenolic compound is added, wherein the molar ratio of the phenolic hydroxyl group to the amino group is 1: 1. The reaction mixture was heated to reflux temperature, and the reaction was maintained for 4 hours, and the heating was stopped. And taking the resin layer, and removing the solvent by using a rotary evaporator to obtain the benzoxazine resin containing double bonds.

In examples 6 to 10 above: the hydrocarbon resin is a poly styrene-butadiene resin (the product production and provision enterprises and the brands can be one or a mixture of two of Clevix Ricon 100, Ricon181, Ricon 184 and the like).

In the above embodiment: the definition of the amount of solids is: the percentage of solid neat resin in solution to the total solution (resin plus solvent) is, for example: the amount of solids of 66.7% in example 1 means that the percentage of pure resin of chemical formula (9) in the total solution is 66.7%.

The technical properties of the low dielectric and high heat resistant benzoxazine resin containing hydrocarbon segments and polyphenylene ether segments prepared in the above examples 6-10 are shown in Table 3 below:

table 3: examples 6-10 resin Performance results Table:

the low dielectric, high heat resistant benzoxazine resins containing hydrocarbon segments and polyphenylene ether segments prepared in examples 6-10 above were cured according to the procedures of 140 ℃ for 1 hour, 160 ℃ for 1 hour, 180 ℃ for 1 hour, and 200 ℃ for 2 hours to form 50mm x 0.8mm castings, and some of the technical performance comparative conditions of the test castings are shown in Table 4 below:

table 4: examples 6-10 cast performance results table:

in the above embodiment: the process parameters (temperature, time, etc.) and the numerical values of the components in each step are in the range, and any point can be applicable.

The present invention and the technical contents not specifically described in the above examples are the same as those of the prior art, and the raw materials are all commercially available products.

The present invention is not limited to the above-described embodiments, and the present invention can be implemented with the above-described advantageous effects.