阅读说明：本技术 一种磷酸酯复合增韧abs树脂的制备方法 (Preparation method of phosphate composite toughened ABS resin ) 是由 孙传金 杨慧慧 孙传贵 于 2020-05-08 设计创作，主要内容包括：本发明公开了一种磷酸酯复合增韧ABS树脂的制备方法；涉及新材料技术领域,包括以下步骤：(1)硬脂酸/磷酸酯复合白炭黑；(2)塑炼处理；(3)熔融挤出；本发明方法制备的ABS树脂的极限氧指数具有大幅度的提高,由此可见,本发明方法制备的ABS树脂的阻燃性能得到大幅度的提高,本发明方法制备的ABS树脂的冲击强度具有大幅度的提高,磷酸酯与硬脂酸、酚醛树脂的质量比例对ABS树脂的冲击强度具有显著的影响。(The invention discloses a preparation method of phosphate composite toughened ABS resin; relates to the technical field of new materials, comprising the following steps: (1) stearic acid/phosphate composite white carbon black; (2) plasticating treatment; (3) melt extrusion; the limit oxygen index of the ABS resin prepared by the method is greatly improved, so that the flame retardant property of the ABS resin prepared by the method is greatly improved, the impact strength of the ABS resin prepared by the method is greatly improved, and the mass ratio of the phosphate to the stearic acid to the phenolic resin has obvious influence on the impact strength of the ABS resin.)

1. The preparation method of the phosphate composite toughened ABS resin is characterized by comprising the following steps:

(1) stearic acid/phosphate composite white carbon black:

uniformly dispersing white carbon black into acetone to prepare white carbon black dispersion liquid, adding stearic acid into the white carbon black dispersion liquid, adjusting the temperature to 80-90 ℃, then stirring for 40-45min, then adjusting the temperature to 112-116 ℃, then preserving heat for 10min, then adding phosphate, continuing stirring for 1-1.5 h, and then performing rotary evaporation drying to obtain stearic acid/phosphate composite white carbon black;

(2) plasticating treatment:

mixing ABS resin, polyamide wax and nano-alumina, adding into a plasticator for plastication,

the plasticating temperature is 180-;

(3) melt extrusion:

and adding the plasticated product into an extruder for extrusion granulation to obtain the product.

2. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 1, wherein: the white carbon black dispersion liquid has the mass fraction of 8-10%.

3. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 1, wherein: the mass ratio of the stearic acid to the white carbon black is 2-3: 15-18.

4. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 1 or 2, wherein: the mass ratio of the phosphate to the stearic acid is 1: 3.

5. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 1, wherein the preparation method comprises the following steps: the weight part ratio of the ABS resin to the polyamide wax to the nano-alumina is 85-90:1-4: 6-8.

6. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 1, wherein: the melt extrusion is as follows;

and mixing the plasticated product with phenolic resin, and adding the mixture into an extruder for extrusion granulation to obtain the phenolic resin plastic.

7. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 6, wherein: the mixing mass ratio of the stearic acid to the phenolic resin is 1: 4-6.

8. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 7, wherein: the phenolic resin is subjected to grafting treatment:

heating the phenolic resin to a molten state, then adding maleic anhydride into the phenolic resin, stirring at the rotating speed of 1200r/min for 45-50min, and then naturally cooling to room temperature to obtain the phenolic resin.

9. The preparation method of the phosphate ester composite toughened ABS resin as claimed in claim 8, wherein the mass ratio of the phenolic resin to the maleic anhydride is 20: 1-2.

Technical Field

The invention belongs to the technical field of new materials, and particularly relates to a preparation method of phosphate composite toughened ABS resin.

Background

ABS resin is one of the most widely used polymers with the largest yield, organically integrates various performances of PS, SAN and BS, and has excellent mechanical properties of toughness, hardness and rigidity balance. ABS is a terpolymer of acrylonitrile, butadiene and styrene, A represents acrylonitrile, B represents butadiene and S represents styrene.

The ABS resin is an Acrylonitrile-butadiene-styrene copolymer, and the ABS is an acronym of Acrylonitrile butadiene styrene, and is a thermoplastic high polymer material which has high strength, good toughness and easy processing and molding. The method is used for preparing various parts such as instruments, electrics, electrical appliances and machinery.

Disclosure of Invention

The invention aims to provide a preparation method of phosphate composite toughened ABS resin, which aims to overcome the defects in the prior art.

The technical scheme adopted by the invention is as follows:

a preparation method of phosphate composite toughened ABS resin comprises the following steps:

(1) stearic acid/phosphate composite white carbon black:

uniformly dispersing white carbon black into acetone to prepare white carbon black dispersion liquid, adding stearic acid into the white carbon black dispersion liquid, adjusting the temperature to 80-90 ℃, then stirring for 40-45min, then adjusting the temperature to 112-116 ℃, then preserving heat for 10min, then adding phosphate, continuing stirring for 1-1.5 h, and then performing rotary evaporation drying to obtain stearic acid/phosphate composite white carbon black;

(2) plasticating treatment:

mixing ABS resin, polyamide wax and nano-alumina, adding into a plasticator for plastication,

the plasticating temperature is 180-;

(3) melt extrusion:

and adding the plasticated product into an extruder for extrusion granulation to obtain the product.

The white carbon black dispersion liquid has the mass fraction of 8-10%.

The mass ratio of the stearic acid to the white carbon black is 2-3: 15-18.

The mass ratio of the phosphate to the stearic acid is 1: 3.

The weight part ratio of the ABS resin to the polyamide wax to the nano-alumina is 85-90:1-4: 6-8.

The melt extrusion is as follows;

and mixing the plasticated product with phenolic resin, and adding the mixture into an extruder for extrusion granulation to obtain the phenolic resin plastic.

The mixing mass ratio of the stearic acid to the phenolic resin is 1: 4-6.

The phenolic resin is subjected to grafting treatment:

heating the phenolic resin to a molten state, then adding maleic anhydride into the phenolic resin, stirring at the rotating speed of 1200r/min for 45-50min, and then naturally cooling to room temperature to obtain the phenolic resin.

The mass ratio of the phenolic resin to the maleic anhydride is 20: 1-2.

Has the advantages that: the ABS resin prepared by the method has greatly improved impact strength, the mass ratio of the phosphate ester to the stearic acid and the phenolic resin has obvious influence on the impact strength of the ABS resin, the mass ratio of the phosphate ester to the stearic acid and the phenolic resin is changed, but the impact strength of the ABS resin is greatly reduced, the comprehensive performance of the ABS resin can be further improved through the combined action of the stearic acid, the phosphate ester and the phenolic resin, but the synergistic action of the phenolic resin, the stearic acid and the phosphate ester has a certain condition, the mass ratio of the stearic acid to the phosphate ester to the phenolic resin has a direct influence relation, the phenolic resin and the stearic acid can inhibit the volatilization of the phosphate ester and generate esterification/ester exchange reaction with the phosphate ester, the phosphate ester is used as a connecting point to connect phenolic resin molecules with ABS resin molecules to form a compact network structure, thereby greatly improving the impact toughness of the ABS resin and effectively improving the flame retardant property of the ABS resin; however, when the ratio of stearic acid, phosphate ester and phenolic resin exceeds the limit, the excessive phosphate ester or stearic acid can cause physical interference or chemical interference on the esterification/transesterification reaction, thereby causing the dispersion of network nodes, promoting the network to be broken and reducing the performance of the ABS resin.

Detailed Description

A preparation method of phosphate composite toughened ABS resin comprises the following steps:

(1) stearic acid/phosphate composite white carbon black:

uniformly dispersing white carbon black into acetone to prepare white carbon black dispersion liquid, adding stearic acid into the white carbon black dispersion liquid, adjusting the temperature to 80-90 ℃, then stirring for 40-45min, then adjusting the temperature to 112-116 ℃, then preserving heat for 10min, then adding phosphate, continuing stirring for 1-1.5 h, and then performing rotary evaporation drying to obtain stearic acid/phosphate composite white carbon black;

white carbon black: average particle size 40 microns; the molecular formula is as follows: SiO 2₂(H₂O) content: 90, respectively;

and (3) executing quality standards: HG/T3061-1999;

(2) plasticating treatment:

mixing ABS resin, polyamide wax and nano-alumina, adding into a plasticator for plastication,

the plasticating temperature is 180-;

(3) melt extrusion:

and adding the plasticated product into an extruder at 185 ℃ for extrusion granulation to obtain the product.

A TEM48 type twin-screw extruder is adopted;

according to the invention, a large number of active reaction groups can be added on the surface of the white carbon black through the stearic acid/phosphate ester composite white carbon black, and further, the white carbon black can be easily subjected to a bonding reaction with ABS resin molecules, so that the white carbon black can be more uniformly dispersed into an ABS resin system, and the toughness and the impact strength of the ABS resin can be effectively enhanced.

The white carbon black dispersion liquid has the mass fraction of 8-10%.

The mass ratio of the stearic acid to the white carbon black is 2-3: 15-18.

The mass ratio of the phosphate to the stearic acid is 1: 3.

The weight part ratio of the ABS resin to the polyamide wax to the nano-alumina is 85-90:1-4: 6-8.

The melt extrusion is as follows;

and mixing the plasticated product with phenolic resin, and adding the mixture into an extruder for extrusion granulation to obtain the phenolic resin plastic.

The mixing mass ratio of the stearic acid to the phenolic resin is 1: 4-6; according to the invention, the comprehensive performance of the ABS resin can be further improved through the combined action of stearic acid, phosphate ester and phenolic resin, but the synergistic action of the phenolic resin, stearic acid and phosphate ester has a certain condition, the mass ratio of the phenolic resin, stearic acid, phosphate ester and phenolic resin has a direct influence relationship, the phenolic resin and stearic acid can inhibit the volatilization of the phosphate ester and have an esterification/ester exchange reaction with the phosphate ester, the phosphate ester is used as a connecting point to connect phenolic resin molecules with ABS resin molecules to form a compact network structure, so that the impact strength of the ABS resin is greatly improved; however, when the ratio of stearic acid, phosphate ester and phenolic resin exceeds the limit, the excessive phosphate ester or stearic acid can cause physical interference or chemical interference on the esterification/transesterification reaction, thereby causing the dispersion of network nodes, promoting the network to be broken and reducing the performance of the ABS resin.

The phenolic resin is subjected to grafting treatment:

heating phenolic resin to a molten state, then adding maleic anhydride into the phenolic resin, stirring at the rotating speed of 1200r/min for 45-50min, and then naturally cooling to room temperature to obtain the phenolic resin; the phenolic resin is grafted, so that the performance of the phenolic resin can be further improved, and the reaction active points of the phenolic resin can be improved.

The mass ratio of the phenolic resin to the maleic anhydride is 20: 1-2.

The following will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.