阅读说明：本技术 苯丙共聚树脂及其制备方法与应用 (Styrene-acrylic copolymer resin and preparation method and application thereof ) 是由 向海波 郭勇 陈君山 戴耀民 于 2020-06-08 设计创作，主要内容包括：本发明公开了苯丙共聚树脂及其制备方法与应用,苯丙共聚树脂由树脂A、树脂B、树脂C在三元共聚物存在下,共挤出制备；树脂A的制备为,将苯乙烯、丙烯酸羟乙酯、富马酸单丁酯、引发剂、交联剂加入沸腾的甲苯中,保温反应后脱除溶剂,得到树脂A；树脂B的制备为,将苯乙烯、丙烯酸丁酯、引发剂、交联剂加入沸腾的二甲苯中,然后保持回流恒温反应后脱除溶剂,得到树脂B；树脂C的制备为,将苯乙烯、甲基丙烯酸丁酯、引发剂、交联剂加入沸腾的甲苯中,保温反应后脱除溶剂,得到树脂C。本发明得到无规树脂粉末粒径为0.5～1.5毫米,用于碳粉打印,具有良好的定影牢固度。(The invention discloses a styrene-acrylic copolymer resin and a preparation method and application thereof, wherein the styrene-acrylic copolymer resin is prepared by co-extruding a resin A, a resin B and a resin C in the presence of a terpolymer; the preparation of the resin A comprises the steps of adding styrene, hydroxyethyl acrylate, monobutyl fumarate, an initiator and a crosslinking agent into boiling toluene, and removing a solvent after heat preservation reaction to obtain the resin A; the preparation of the resin B comprises the steps of adding styrene, butyl acrylate, an initiator and a cross-linking agent into boiling dimethylbenzene, then keeping refluxing and reacting at a constant temperature, and removing a solvent to obtain the resin B; the preparation of the resin C is that styrene, butyl methacrylate, an initiator and a cross-linking agent are added into boiling toluene, and the solvent is removed after the heat preservation reaction to obtain the resin C. The particle size of the random resin powder obtained by the invention is 0.5-1.5 mm, and the random resin powder is used for carbon powder printing and has good fixation firmness.)

1. A styrene-acrylic copolymer resin is prepared by co-extruding a resin A, a resin B and a resin C in the presence of a terpolymer; the preparation of the resin A comprises the steps of adding styrene, hydroxyethyl acrylate, monobutyl fumarate, an initiator and a crosslinking agent into boiling toluene, and removing a solvent after heat preservation reaction to obtain the resin A; the preparation of the resin B comprises the steps of adding styrene, butyl acrylate, an initiator and a cross-linking agent into boiling dimethylbenzene, and removing a solvent after heat preservation reaction to obtain the resin B; the preparation of the resin C is that styrene, butyl methacrylate, an initiator and a cross-linking agent are added into boiling toluene, and the solvent is removed after the heat preservation reaction to obtain the resin C.

2. The styrene-acrylic copolymer resin as set forth in claim 1, wherein the weight ratio of the resin A to the resin B to the resin C is 50: 30-40: 10-20.

3. The styrene-acrylic copolymer resin as set forth in claim 2, wherein the weight ratio of the resin A, the resin B and the resin C is 50: 35: 15.

4. The styrene-acrylic copolymer resin as set forth in claim 1, wherein the terpolymer is used in an amount of 0.5 to 0.6% by weight based on the sum of the amounts of the resin A, the resin B and the resin C.

5. The styrene-acrylic copolymer resin as set forth in claim 1, wherein the crosslinking agent is divinylbenzene or butanediol diacrylate; the initiator is cumene hydroperoxide or di-tert-butyl peroxide.

6. The styrene-acrylic copolymer resin as set forth in claim 1, wherein the styrene, hydroxyethyl acrylate and monobutyl fumarate are prepared in a molar ratio of 7: 2: 1, the dosage of the initiator is 1.5 percent of the weight sum of the styrene, the hydroxyethyl acrylate and the monobutyl fumarate, and the dosage of the cross-linking agent is 5 percent of the weight sum of the styrene, the hydroxyethyl acrylate and the monobutyl fumarate.

7. The styrene-acrylic copolymer resin as recited in claim 1, wherein in the preparation of the resin B, the molar ratio of styrene to butyl acrylate is 8: 2, the amount of the initiator is 2% of the sum of the weight of styrene and butyl acrylate, and the amount of the cross-linking agent is 8% of the sum of the weight of styrene and butyl acrylate; in the preparation of the resin C, the molar ratio of the styrene to the butyl methacrylate is 3: 1, the dosage of the initiator is 4 percent of the sum of the weight of the styrene and the butyl methacrylate, and the dosage of the cross-linking agent is 3 percent of the sum of the weight of the styrene and the butyl methacrylate.

8. The styrene-acrylic copolymer resin as set forth in claim 1, wherein in the preparation of the resin A, the reaction is carried out at 110 ℃ for 2.5 hours; in the preparation of the resin B, the reaction is carried out for 3 hours at the temperature of 140 ℃; in the preparation of the resin C, the reaction was carried out at 110 ℃ for 2 hours.

9. Use of the styrene-acrylic copolymer resin as defined in claim 1 for the preparation of carbon powder.

10. The use according to claim 9, wherein the carbon powder has a constant temperature fixing fastness property.

Technical Field

The invention belongs to a high polymer synthesis technology, and particularly relates to styrene-acrylic copolymer resin and a preparation method and application thereof.

Background

Carbon powder resins used in printers and copiers are mostly styrene-acrylic copolymer resins, but in view of structural characteristics of the styrene-acrylic copolymer resins, the softening point (Ts) is also high at a relatively suitable glass transition temperature (Tg), so that the low-temperature fixing is not good, and the application of the styrene-acrylic copolymer resins in high-speed printers and copiers is also limited.

Disclosure of Invention

The invention discloses a styrene-acrylic copolymer resin and a preparation method and application thereof, wherein styrene-acrylic resins with different molecular weights are obtained through selection of monomers and limitation of polymer parameters, and then are co-extruded into sheets and crushed to obtain resin powder (the particle size is about 0.5-1.5 mm), so that the styrene-acrylic copolymer resin is used for carbon powder printing and has good fixation firmness.

The invention adopts the following technical scheme:

a styrene-acrylic copolymer resin is prepared by co-extruding a resin A, a resin B and a resin C in the presence of a terpolymer; the preparation of the resin A comprises the steps of adding styrene, hydroxyethyl acrylate, monobutyl fumarate, an initiator and a crosslinking agent into boiling toluene, and removing a solvent after heat preservation reaction to obtain the resin A; the preparation of the resin B comprises the steps of adding styrene, butyl acrylate, an initiator and a cross-linking agent into boiling dimethylbenzene, and removing a solvent after heat preservation reaction to obtain the resin B; the preparation of the resin C is that styrene, butyl methacrylate, an initiator and a cross-linking agent are added into boiling toluene, and the solvent is removed after the heat preservation reaction to obtain the resin C.

In the invention, the weight ratio of the resin A to the resin B to the resin C is 50: 30-40: 10-20, preferably 50: 35: 15; the prepared styrene-acrylic copolymer resin has good thermal property and electrical property according to a proper proportion, can be suitable for high-performance printing and particularly has good fixation firmness.

In the invention, the usage amount of the terpolymer is 0.5-0.6% of the sum of the weight of the resin A, the weight of the resin B and the weight of the resin C. The styrene-acrylic resin with good electrical property can be obtained by direct coextrusion without adding the terpolymer, but the fixation firmness is slightly inferior, the terpolymer originally used among different resins is creatively added into the same resin A, resin B and resin C in a small amount, the printing property of a product obtained by coextrusion is improved, and the improvement of the uniformity of the properties of the three resins is probably facilitated by adding the terpolymer.

In the invention, the cross-linking agent is divinyl benzene or butanediol diacrylate; the initiator is cumene hydroperoxide or di-tert-butyl peroxide.

In the invention, in the preparation of the resin A, the molar ratio of styrene to hydroxyethyl acrylate to the monobutyl fumarate is 7: 2: 1, the dosage of the initiator is 1.5 percent of the sum of the weight of the styrene, the hydroxyethyl acrylate and the monobutyl fumarate, and the dosage of the cross-linking agent is 5 percent of the sum of the weight of the styrene, the hydroxyethyl acrylate and the monobutyl fumarate; in the preparation of the resin B, the molar ratio of the styrene to the butyl acrylate is 8: 2, the dosage of the initiator is 2 percent of the sum of the weight of the styrene and the butyl acrylate, and the dosage of the cross-linking agent is 8 percent of the sum of the weight of the styrene and the butyl acrylate; in the preparation of the resin C, the molar ratio of the styrene to the butyl methacrylate is 3: 1, the dosage of the initiator is 4 percent of the sum of the weight of the styrene and the butyl methacrylate, and the dosage of the cross-linking agent is 3 percent of the sum of the weight of the styrene and the butyl methacrylate.

In the invention, in the preparation of the resin A, the reaction is carried out for 2.5 hours at the temperature of 110 ℃; in the preparation of the resin B, the reaction is carried out for 3 hours at the temperature of 140 ℃; in the preparation of the resin C, the reaction was carried out at 110 ℃ for 2 hours.

In the invention, the solvent is removed by vacuum reduced pressure distillation, and the operation of the vacuum reduced pressure distillation is a conventional technology, so that the solvent can be removed.

In the invention, the resin A, the resin B, the resin C and the terpolymer are added into a screw extruder, and styrene-acrylic copolymer resin is prepared by coextrusion; screw extrusion is a conventional technology, and the specific selection does not influence the realization of the technical effect of the invention.

Detailed Description