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CN-122011649-A - HIPS material with scratch resistance and good toughness and preparation method thereof

CN122011649ACN 122011649 ACN122011649 ACN 122011649ACN-122011649-A

Abstract

The application relates to the technical field of HIPS material processing, in particular to a HIPS material with good scratch resistance and toughness and a preparation method thereof, and the HIPS material is prepared from, by weight, 60-70 parts of high impact polystyrene, 15-20 parts of polyethylene, 2-3 parts of styrene-butadiene rubber, 4-7 parts of polyether-polyamide block copolymer, 20-35 parts of scratch resistance agent and 3-5 parts of toughening agent. Wherein the polyethylene is compounded by three polyethylenes with melt flow rates of 0.5-1g/10min, 2-3g/10min and 3-5g/10min respectively. The application improves the compactness of the material by the low melt flow rate polyethylene, optimizes the interface compatibility by the medium melt flow rate polyethylene and ensures the processing fluidity by the high melt flow rate polyethylene, and the three synergistically improves the forming processing performance and the structural stability, the styrene-butadiene rubber, the polyether-polyamide segmented copolymer and the toughening agent synergistically improve the low-temperature toughness, and the scratch resistant agent synchronously improves the surface hardness and the scratch resistance. The prepared material has excellent scratch resistance and low-temperature toughness, and can be used in an environment of-20 ℃ to-40 ℃.

Inventors

  • ZHANG XIANGMENG
  • XIE TIAN
  • Song Chaoxuan
  • XIAO GAOJI

Assignees

  • 广东国亨优合新材料股份有限公司

Dates

Publication Date
20260512
Application Date
20260123

Claims (10)

  1. 1. The HIPS material with good scratch resistance and toughness is characterized by being prepared from the following raw materials in parts by weight: 60-70 parts of high impact polystyrene 15-20 Parts of polyethylene 2-3 Parts of styrene butadiene rubber 4-7 Parts of polyether-polyamide block copolymer Scratch-resistant agent 20-35 parts 3-5 Parts of toughening agent The polyethylene consists of polyethylene I, polyethylene II and polyethylene III; the melt flow rate of the polyethylene I under the condition of 190 ℃ per 2.16kg is 0.5-1g/10min; The melt flow rate of the polyethylene II under the condition of 190 ℃ per 2.16kg is 2-3g/10min; The melt flow rate of the polyethylene III at 190 ℃ per 2.16kg is 3-5g/10min.
  2. 2. The HIPS material with good scratch resistance and toughness according to claim 1, wherein the weight ratio of the polyethylene I, the polyethylene II and the polyethylene III is 5 (4-6): 2-4.
  3. 3. The scratch resistant and tough HIPS material of claim 1, wherein the scratch resistant agent is prepared by the following method: 1) Dispersing nano boron nitride and nano aluminum oxide in absolute ethyl alcohol, regulating the pH to 4.0-4.5 by hydrochloric acid, refluxing and stirring for 1-2h at 65-70 ℃, filtering and drying to obtain hydroxylated nano boron nitride and hydroxylated nano aluminum oxide; 2) Dispersing hydroxylated nano boron nitride and hydroxylated nano alumina in ethanol, performing ultrasonic dispersion, dropwise adding 3-aminopropyl triethoxysilane and glacial acetic acid, reacting for 5-6 hours at 60-65 ℃, filtering, and washing to obtain aminated nano boron nitride and aminated nano alumina; 3) Dispersing the aminated nano boron nitride and the aminated nano aluminum oxide in toluene, carrying out ultrasonic treatment, adding octamethyl cyclotetrasiloxane and tetramethylammonium hydroxide, heating to 105-110 ℃, reacting for 6-8 hours under the protection of nitrogen, cooling to room temperature, and carrying out centrifugal separation to obtain a product; 4) And mixing the product with polyester modified silicone to obtain the scratch resistant agent.
  4. 4. The scratch-resistant and tough HIPS material according to claim 3, characterized in that the raw materials used for preparing the scratch-resistant agent are as follows in parts by weight: 40-50 parts of nano boron nitride 15-25 Parts of nano alumina 10-15 Parts of aminopropyl triethoxy silane Glacial acetic acid 1-2 parts 15-20 Parts of octamethyl cyclotetrasiloxane 0.2 To 0.5 part of tetramethyl ammonium hydroxide 20-30 Parts of polyester modified silicone.
  5. 5. The HIPS material with good scratch resistance and toughness according to claim 1, wherein the toughening agent consists of methyl acrylate-butadiene-styrene copolymer and maleic anhydride grafted SEBS according to the weight ratio of (3-5): 1.
  6. 6. The HIPS material with good scratch resistance and toughness according to claim 1, wherein the average particle size of the nano boron nitride is 100-300nm, and the average particle size of the nano aluminum oxide is 400-800nm.
  7. 7. The HIPS material with good scratch resistance and toughness according to claim 1, wherein the polyether-polyamide block copolymer has a structural formula of PA-b-PEG-b-PA and/or PA-b-PPG-b-PA.
  8. 8. The HIPS material with good scratch resistance and toughness according to claim 1, wherein the styrene-butadiene rubber has a styrene content of 22.5-24.5% and a Mooney viscosity of 48-56.
  9. 9. The scratch resistant and tough HIPS material according to claim 1, wherein the polyethylene I has a melt flow rate of 0.7g/10min at 190 ℃ per 2.16 kg; the melt flow rate of the polyethylene II under the condition of 190 ℃ per 2.16kg is 2.6g/10min; The melt flow rate of the polyethylene III at 190 ℃ per 2.16kg is 4.1g/10min.
  10. 10. A process for the preparation of a scratch resistant and tough HIPS material according to any one of claims 1 to 9, comprising the following preparation steps: S1, mixing dried high impact polystyrene, polyethylene, styrene-butadiene rubber and polyether-polyamide block copolymer, and then adding a scratch resistant agent and a toughening agent for mixing to obtain a mixture; s2, placing the mixture in a double-screw extruder, extruding, granulating, and obtaining the HIPS material with good scratch resistance and toughness.

Description

HIPS material with scratch resistance and good toughness and preparation method thereof Technical Field The application relates to the technical field of HIPS material processing, in particular to a HIPS material with scratch resistance and good toughness and a preparation method thereof. Background High impact polystyrene is an important thermoplastic resin material, which is prepared by blending and modifying polystyrene with rubber elastomer. Because of the good rigidity, easy processability and low cost of polystyrene and the impact resistance imparted by rubber phase, HIPS materials have been widely used in the fields of automotive upholstery, household appliance housings, office equipment, electronic and electrical products, packaging materials and the like. However, with the continuous increase in the demands of downstream applications for product performance, the inherent drawbacks of conventional HIPS materials are increasingly pronounced, mainly in the following aspects: First, the surface hardness is insufficient and scratch resistance is poor. The surface hardness of the traditional HIPS material is generally low, and the traditional HIPS material is easily scratched by sharp objects in the daily use process, so that scratches appear on the surface of a product, the appearance quality of the product is affected, the user experience is reduced, and the crack expansion caused by stress concentration is possibly caused, so that the service life of the product is shortened. Especially in application scenes with strict requirements on appearance, such as automotive interiors, high-end household appliance shells and the like, scratch resistance is one of key indexes for measuring material quality. Second, the low temperature toughness is poor, and the impact strength is obviously reduced. Although HIPS materials have better impact resistance under normal temperature environment, due to higher glass transition temperature, molecular chain segment movement of the materials is limited under low temperature environment (such as-20 ℃ to-40 ℃), so that toughness is rapidly reduced, and brittleness tendency is remarkably increased. This disadvantage severely limits the application of HIPS materials in cold areas or under low temperature conditions, such as electrical equipment for outdoor use, low temperature shipping packaging, and automotive exterior parts and components. The technical defects limit the application expansion of HIPS materials in high-end markets and special environments to a great extent. Therefore, how to effectively improve the surface hardness and the low-temperature toughness of HIPS materials on the basis of maintaining the original cost advantage and the processing performance of HIPS materials has become a problem to be solved. Disclosure of Invention In order to solve the problems of insufficient HIPS surface hardness and poor low-temperature toughness, the application provides a HIPS material with scratch resistance and good toughness and a preparation method thereof. In a first aspect, the application provides a HIPS material with good scratch resistance and toughness, which adopts the following technical scheme: a HIPS material with scratch resistance and good toughness is prepared from the following raw materials in parts by weight: 60-70 parts of high impact polystyrene 15-20 Parts of polyethylene 2-3 Parts of styrene butadiene rubber 4-7 Parts of polyether-polyamide block copolymer Scratch-resistant agent 20-35 parts 3-5 Parts of toughening agent The polyethylene consists of polyethylene I, polyethylene II and polyethylene III; the melt flow rate of the polyethylene I under the condition of 190 ℃ per 2.16kg is 0.5-1g/10min; the melt flow rate of the polyethylene II under the condition of 190 ℃ per 2.16kg is 2-3g/10min; The melt flow rate of the polyethylene III at 190 ℃ per 2.16kg is 3-5g/10min. By adopting the technical scheme, the HIPS material with good scratch resistance and toughness has good hardness and scratch resistance, can reduce the scratch of products by sharp objects in the use process, can meet the use requirements of severe viewing requirements of automobile interiors, high-end household appliance shells and the like, optimizes the low-temperature toughness of the material, reduces the embrittlement tendency of the material, reduces the reduction amplitude of impact strength at low temperature, and can be used in low-temperature environments ranging from-20 ℃ to-40 ℃ and meet the application scenes in low-temperature working conditions of outdoor electric appliances, low-temperature transportation packages, automobile external parts and the like in cold areas. According to the application, three polyethylenes with different melt flow rates are compounded for use, the polyethylene I with low melt flow rate can improve the compactness of the internal structure of the material, the polyethylene II with medium melt flow rate can optimize the interface compatibilit