阅读说明：本技术 苯丙共聚树脂组合物及其制备方法与应用 (Styrene-acrylic copolymer resin composition 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组合物及其制备方法与应用,树脂A、树脂B、树脂C在三元共聚物存在下共挤出制备苯丙共聚树脂；将100份上述苯丙共聚树脂树脂粉、炭黑、聚乙烯蜡、3,5-二叔丁基水杨酸的锌化合物、硅微粉在常规混料机中预混15分钟后加入混练机中,常规混练,得到苯丙共聚树脂组合物。本发明得到粒径为5～12微米的苯丙共聚树脂组合物,用于打印,具有良好的定影牢固度。(The invention discloses a styrene-acrylic copolymer resin composition and a preparation method and application thereof, wherein resin A, resin B and resin C are co-extruded in the presence of a terpolymer to prepare styrene-acrylic copolymer resin; and premixing 100 parts of the styrene-acrylic copolymer resin powder, carbon black, polyethylene wax, zinc compound of 3, 5-di-tert-butyl salicylic acid and silicon micropowder in a conventional mixer for 15 minutes, adding into a mixing machine, and conventionally mixing to obtain the styrene-acrylic copolymer resin composition. The styrene-acrylic copolymer resin composition with the particle size of 5-12 microns is used for printing and has good fixing firmness.)

1. A styrene-acrylic copolymer resin composition is prepared by mixing styrene-acrylic copolymer resin powder, carbon black, polyethylene wax, zinc compound of 3, 5-di-tert-butyl salicylic acid and silicon micropowder and then kneading to obtain the styrene-acrylic copolymer resin composition; the styrene-acrylic copolymer resin powder is prepared by co-extruding resin A, resin B and 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 composition according to claim 1, wherein the weight ratio of the resin A to the resin B to the resin C is 50: 30 to 40: 10 to 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 composition according to claim 1, wherein the terpolymer is used in an amount of 0.5 to 0.6% by weight of the sum of the weight of the resin A, the weight of the resin B and the weight of the resin C.

5. The styrene-acrylic copolymer resin composition according to 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 composition as set forth in claim 1, wherein the resin A is prepared in a molar ratio of styrene, hydroxyethyl acrylate and monobutyl fumarate 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 composition as set forth 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% by weight of the sum of the styrene and butyl acrylate, and the amount of the crosslinking agent is 8% by weight of the sum of the 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 composition according to 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. The styrene-acrylic copolymer resin composition as set forth in claim 1, wherein the weight ratio of the styrene-acrylic copolymer resin powder, the carbon black, the polyethylene wax, the zinc compound of 3, 5-di-t-butyl salicylic acid and the fine silicon powder is 100: 8.8: 1.8: 3: 1.5.

10. Use of the styrene-acrylic copolymer resin composition according to claim 1 as a carbon powder.

Technical Field

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

Background

The carbon powder is a powdery substance used for imaging and fixing on paper in a laser printer and comprises components such as binding resin, carbon black, a charge control agent, an external additive and the like. Pigments of other colors and the like are also required to be added to the color toner. In printing, a monomer remaining in the resin is volatilized by heating, which may cause a pungent odor, and in view of structural characteristics of the styrene-acrylic copolymer resin, its softening point (Ts) is also high at a relatively suitable glass transition temperature (Tg), which is not good in low-temperature fixing, and application of the styrene-acrylic copolymer resin to high-speed printers and copiers is also limited.

Disclosure of Invention

The invention discloses a styrene-acrylic copolymer resin composition and a preparation method and application thereof, styrene-acrylic resins with different molecular weights are obtained through selection of monomers and limitation of polymer parameters, and then are co-extruded to obtain resin powder with the particle size of 0.5-1.5 mm, and the prepared carbon powder is used for printing and has good fixing firmness.

The invention adopts the following technical scheme:

a styrene-acrylic copolymer resin composition is prepared by mixing styrene-acrylic copolymer resin powder, carbon black, polyethylene wax, zinc compound of 3, 5-di-tert-butyl salicylic acid and silicon micropowder and then kneading to obtain the styrene-acrylic copolymer resin composition; the styrene-acrylic copolymer resin powder is prepared by co-extruding resin A, resin B and 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 weight ratio of the styrene-acrylic copolymer resin powder, the carbon black, the polyethylene wax, the zinc compound of the 3, 5-di-tert-butyl salicylic acid and the silicon micro powder is 100: 8.8: 1.8: 3: 1.5.

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.

Compared with the comparative carbon powder, the carbon powder prepared by using the styrene-acrylic copolymer resin as the resin matrix obviously increases the development density, and the gray level, the waste powder rate and the powder consumption of the carbon powder are reduced to different degrees, so that the printing quality can be improved.

Detailed Description