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CN-122011666-A - Regenerated ABS material and preparation method thereof

CN122011666ACN 122011666 ACN122011666 ACN 122011666ACN-122011666-A

Abstract

The application relates to a regenerated ABS material and a preparation method thereof, belonging to the technical field of ABS materials, and comprising, based on 100% of the total mass of raw material components of the regenerated ABS material, 60-70% of ABS reclaimed materials, 15-25% of first ABS plastic, 9-12% of second ABS plastic, 5-10% of modified rubber powder and 0.1-2% of antioxidant, wherein the melt flow index of the first ABS plastic under the conditions of 220 ℃ per 10 kg is greater than that of the ABS reclaimed materials under the conditions of 220 ℃ per 10 kg; swelling the rubber powder with ethanol, reacting with water glass under alkaline condition to obtain a pretreatment product, performing graft copolymerization and reaction on the pretreatment product and gamma-urea propyl trimethoxy silane in an ethanol system, and performing suction filtration and vacuum drying to obtain the modified rubber powder. The regenerated ABS material prepared by the application meets the requirements of excellent melt fluidity and antistatic capability, and secondary processing is not affected.

Inventors

  • LI JIARONG
  • HU JIANPING

Assignees

  • 日彩复合塑料(深圳)有限公司

Dates

Publication Date
20260512
Application Date
20260324

Claims (10)

  1. 1. The regenerated ABS material is characterized by comprising, by total mass of raw material components of 100%, 60-70% of an ABS reclaimed material, 15-25% of a first ABS plastic, 9-12% of a second ABS plastic, 5-10% of modified rubber powder and 0.1-2% of an antioxidant, wherein the melt flow index of the first ABS plastic under the condition of 220 ℃ per 10 kg is greater than that of the ABS reclaimed material under the condition of 220 ℃ per 10 kg, and the preparation method of the modified rubber powder comprises the steps of swelling the rubber powder by ethanol, reacting the rubber powder with water glass under the alkaline condition to obtain a pretreated product, performing graft copolymerization and reaction on the pretreated product and gamma-urea propyl trimethoxy silane in an ethanol system, and performing suction filtration and vacuum drying to obtain the modified rubber powder.
  2. 2. The regenerated ABS material according to claim 1, wherein the regenerated ABS material comprises, by total mass of raw material components of the regenerated ABS material being 100%, 63-66% of an ABS reclaimed material, 18-22% of a first ABS plastic, 9.5-11% of a second ABS plastic, 5-8% of modified rubber powder and 0.1-0.5% of an antioxidant.
  3. 3. The reclaimed ABS material of claim 1 wherein the modified rubber powder preparation method comprises the steps of: S1, immersing rubber powder into an ethanol solution for first mixing, draining the ethanol solution in a system after the first mixing, adding water glass into the system after the draining for second mixing, adjusting the pH value of the system after the second mixing to 9-11, and finally sequentially standing and suction-filtering the system after the pH value adjustment to obtain a solid phase product which is a pretreatment product; S2, dispersing the pretreated product in an ethanol solution to form a swelling system, adding gamma-urea propyl trimethoxy silane into the swelling system for third mixing, adjusting the pH value of the system after the third mixing to 6-7, carrying out suction filtration on the system after the third mixing, and then carrying out vacuum drying on a solid phase product obtained by suction filtration at 55-65 ℃ to obtain the modified rubber powder.
  4. 4. The recycled ABS material of claim 3 wherein in step S1 the ratio of the amount of the gum, ethanol solution to water glass is 100 g:300~500 mL:10~20 mL.
  5. 5. The regenerative ABS material according to claim 3 or 4, wherein in step S2, the mass ratio of the pretreatment product to γ -ureidopropyltrimethoxysilane is 6 to 8:1.
  6. 6. The reclaimed ABS material of claim 3 or 4 wherein the particle size of the rubber powder is 20-60 mesh.
  7. 7. The recycled ABS material according to claim 1 or 2, wherein the melt flow index of the ABS recycled material at 220 ℃ per 10kg is 27-31 mL per 10 min, the test standard is ISO 1133-1-2011, the melt flow index of the first ABS plastic at 220 ℃ per 10kg is 36-39 mL per 10 min, the test standard is ISO 1133-1-2011, the melt flow index of the second ABS plastic at 200 ℃ per 21.6 kg is 18-21 g per 10 min, and the test standard is ASTMD 1238.
  8. 8. The recycled ABS material of claim 7 wherein the ABS recycle has an impact strength of 8 to 10 KJ/m 2 under test standard ISO 179-2, the first ABS plastic has an impact strength of 20 to 25 KJ/m 2 under test standard ISO 179-2, and the second ABS plastic has a notched izod impact strength of 26 to 34 kg-cm/cm under test standard ASTM D256.
  9. 9. The regenerative ABS material according to claim 1 or 2, wherein the antioxidant is a mixture of antioxidant 1010 and antioxidant 168, and the mass ratio of antioxidant 1010 to antioxidant 168 is 1:1.
  10. 10. A preparation method of the regenerated ABS material according to any one of claims 1-9 is characterized by comprising the steps of carrying out melt mixing on the ABS reclaimed material, a first ABS plastic, an antioxidant and 40-60 wt% of modified rubber powder in a premixing area of a double-screw extruder, carrying out blending on an obtained mixed product, the second ABS plastic and the rest of modified rubber powder in a reaction area of the double-screw extruder, and then vacuumizing, extruding, granulating, cooling and drying to obtain the regenerated ABS material, wherein the temperature of the premixing area is 160-180 ℃, and the temperature of the reaction area is 190-210 ℃.

Description

Regenerated ABS material and preparation method thereof Technical Field The application relates to the technical field of ABS materials, in particular to a regenerated ABS material and a preparation method thereof. Background The regenerated ABS is subjected to multiple thermo-mechanical operations, so that the problems of molecular chain degradation, multiple impurities, uneven color, poor melt fluidity and the like are commonly existed, and the application of the regenerated ABS in high-end products is limited. In order to improve the melt fluidity of the ABS reclaimed materials, a lubricant is generally added into the reclaimed materials, but the lubricant is easy to migrate to the surface under high shear or high temperature, so that 'frosting' is caused, and secondary processing (such as spraying and bonding) is influenced, meanwhile, the common reclaimed ABS materials generally have no antistatic capability and cannot be directly used for electronic components, the existing improvement mode is that the antistatic agent or conductive filler is added, the compatibility of the antistatic agent or conductive filler and the reclaimed ABS is poor, agglomeration or migration is easy to generate, and the comprehensive performance of the reclaimed plastics is poor. Disclosure of Invention The application aims at solving the defects that the regenerated ABS material in the prior art is difficult to simultaneously meet the excellent melt fluidity and antistatic capacity and secondary processing is not influenced, and provides a regenerated ABS material and a preparation method thereof. According to the technical scheme, the regenerated ABS material comprises, by total mass of raw material components of the regenerated ABS material being 100%, 60-70% of ABS reclaimed materials, 15-25% of first ABS plastic, 9-12% of second ABS plastic, 5-10% of modified rubber powder and 0.1-2% of antioxidant, wherein the melt flow index of the first ABS plastic under the condition of 220 ℃ per 10 kg is larger than that of the ABS reclaimed materials under the condition of 220 ℃ per 10 kg, and the preparation method of the modified rubber powder comprises the steps of swelling the rubber powder by ethanol, reacting the rubber powder with water glass under an alkaline condition to obtain a pretreated product, carrying out graft copolymerization and reaction on the pretreated product and gamma-urea propyl trimethoxy silane in an ethanol system, and carrying out suction filtration and vacuum drying to obtain the modified rubber powder. According to the technical scheme, the Si-O-Si network formed by the water glass penetrates through the rubber powder to form the hybrid rubber powder, gamma-urea propyl trimethoxy silane grafted on the surface of the hybrid rubber powder is hydrolyzed to form ureido, nitrogen atoms and carbonyl oxygen in the ureido have strong polarities, environmental water molecules can be adsorbed to form a hydrogen bond network, adsorbed water is dissociated in the hydrogen bond network to generate H + and OH -, directional migration is carried out under the drive of an electric field, the surface resistance is reduced, meanwhile, the Si-O-Si network is used as a rigid framework, the supporting ureido is uniformly distributed, the breakage of a conductive path caused by aggregation is avoided, the charge mobility is improved, so that the antistatic capacity is improved, and the gamma-urea propyl trimethoxy silane forms an organic modification layer on the surface of the rubber powder, so that the interfacial compatibility between the modified rubber powder and an ABS matrix is improved, the interfacial friction resistance is reduced, the flow of an ABS chain segment is facilitated in the melt processing process, and the phenomena of yellowing, embrittlement and the like of the prepared regenerated ABS material can be prevented by cooperatively adding an antioxidant. Optionally, the raw material components of the regenerated ABS material comprise, by weight, 63-66% of an ABS reclaimed material, 18-22% of a first ABS plastic, 9.5-11% of a second ABS plastic, 5-8% of modified rubber powder and 0.1-0.5% of an antioxidant, wherein the total mass of the raw material components of the regenerated ABS material is 100%. Optionally, the preparation method of the modified rubber powder comprises the following steps: S1, immersing rubber powder into an ethanol solution for first mixing, draining the ethanol solution in a system after the first mixing, adding water glass into the system after the draining for second mixing, adjusting the pH value of the system after the second mixing to 9-11, and finally sequentially standing and suction-filtering the system after the pH value adjustment to obtain a solid phase product which is a pretreatment product; S2, dispersing the pretreated product in an ethanol solution to form a swelling system, adding gamma-urea propyl trimethoxy silane into the swelling system for third mixing, adju