阅读说明：本技术 一种冰箱内衬胆料用增韧色母及其制备方法 (Toughening color master batch for liner material of refrigerator and preparation method thereof ) 是由 李森 韩爱林 于 2020-07-09 设计创作，主要内容包括：本发明公开了一种冰箱内衬胆料用增韧色母及其制备方法,涉及高分子材料技术领域。本发明组分按质量百分数配比为：增韧剂30％-55％、钛白粉40-60％,分散剂4-6％、抗氧剂0.5-1％。本发明还提供一种冰箱内衬胆料用增韧色母的制备方法,包括如下步骤：步骤一,将增韧剂、钛白粉,分散剂和抗氧剂按原料配比放入搅拌机混合均匀；步骤二,将步骤一中得到的混合料送入双螺杆挤出机中进行熔融共混挤出、冷却、造粒,制得冰箱内衬胆料用增韧色母。本发明通过添加增韧剂和钛白粉,解决了现有的冰箱胆料在板材挤出中直接回用造成HIPS材料延伸率、ESCR性能下降的问题以及造粒费用高和二次加热挤出造粒加速HIPS材料的老化和力学性能劣化的情况。(The invention discloses a toughening color master batch for a liner material of a refrigerator and a preparation method thereof, and relates to the technical field of high polymer materials. The invention comprises the following components in percentage by mass: 30-55% of toughening agent, 40-60% of titanium dioxide, 4-6% of dispersing agent and 0.5-1% of antioxidant. The invention also provides a preparation method of the toughening color master batch for the liner material of the refrigerator, which comprises the following steps: step one, putting a toughening agent, titanium dioxide, a dispersing agent and an antioxidant into a stirrer according to the raw material ratio and uniformly mixing; and step two, feeding the mixture obtained in the step one into a double-screw extruder for melt blending extrusion, cooling and granulation to prepare the toughening color master batch for the liner material of the refrigerator. The invention solves the problems of the elongation percentage and ESCR performance reduction of HIPS material caused by the direct reuse of the prior refrigerator liner material in the extrusion of plates and the conditions of high granulation cost and accelerated aging and mechanical property deterioration of the HIPS material by secondary heating extrusion granulation by adding the flexibilizer and the titanium dioxide.)

1. The utility model provides a refrigerator inside lining courage material is with toughening look female which characterized in that: the components by mass percentage are as follows:

30-55% of toughening agent, 40-60% of titanium dioxide, 4-6% of dispersing agent and 0.5-1% of antioxidant.

2. The toughening color master batch for the liner material of the refrigerator according to claim 1, wherein the toughening agent is one or a mixture of two of a styrene-butadiene block copolymer and a hydrogenated styrene-butadiene block copolymer.

3. The toughening color master batch for the liner material of the refrigerator according to claim 1, wherein the dispersing agent is one or more of ethylene bis stearamide, high melting point paraffin and sodium stearate.

4. The toughening color master batch for the liner material of the refrigerator according to claim 1, wherein the antioxidant is one or more of antioxidant 168, antioxidant 264, antioxidant 1010 and antioxidant 1076.

5. The preparation method of the toughening color master batch for the liner material of the refrigerator as claimed in any one of claims 1 to 4, characterized by comprising the following steps:

step one, putting a toughening agent, titanium dioxide, a dispersing agent and an antioxidant into a stirrer according to the raw material ratio and uniformly mixing;

and step two, feeding the mixture obtained in the step one into a double-screw extruder for melt blending extrusion, cooling and granulation to prepare the toughening color master batch for the liner material of the refrigerator.

6. The method for preparing the toughening color master batch for the liner material of the refrigerator according to claim 5, wherein the temperature of the cylinder of the twin-screw extruder is controlled within a range of 175 ℃ to 215 ℃ during blending and extrusion by the twin-screw extruder in the second step.

7. The method for preparing the toughening color master batch for the liner material of the refrigerator according to claim 6, wherein the temperature control range of the runner of the twin-screw extruder is 190-215 ℃ during blending and extruding of the twin-screw extruder in the second step.

8. The preparation method of the toughening color master batch for the liner material of the refrigerator according to claim 7, wherein when the twin-screw extruder in the second step is blended and extruded, the temperature of a die of the twin-screw extruder is in a range of 190 ℃ to 225 ℃; the screw rotating speed of the double-screw extruder is 80-150 r/min.

Technical Field

The invention belongs to the technical field of high polymer materials, and particularly relates to a toughening color master batch for a liner material of a refrigerator and a preparation method thereof.

Background

HIPS (high impact polystyrene) is a material with the largest using amount of the lining in the refrigerator industry at present, liner materials are generated after unqualified linings generated in the processes of lining plastic molding and online assembly are broken, the liner materials are preheated and heated for plastic-suction stretch molding in the plastic-suction molding process, the performances such as elongation and the like are reduced, if the liner materials are directly recycled in the process of plate extrusion, the environmental stress corrosion cracking (ESCR) resistance of the lining is reduced, the cracking probability of the refrigerator lining is increased, and the market complaints and goods returns are caused.

The bile generated in the production process of the current refrigerator industry accounts for 5% -10% of the HIPS raw material. The existing method for treating the liner material is mainly used for recycling the liner material in plate extrusion after granulation modification, and the liner material is subjected to re-granulation, so that the granulation cost is high, and in addition, secondary heating extrusion granulation is performed, so that the aging and the mechanical property degradation of the HIPS material can be accelerated.

Disclosure of Invention

The invention aims to provide a toughening color master batch for a liner material of a refrigerator and a preparation method thereof, solves the problems that the elongation rate and ESCR performance of a HIPS material are reduced due to the direct recycling of the liner material of the existing refrigerator in the extrusion of plates, and the liner material is not required to be granulated again, and solves the problems of high granulation cost and accelerated aging and mechanical property deterioration of the HIPS material due to the secondary heating extrusion granulation.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a toughening color master batch for a liner material of a refrigerator, which comprises the following components in percentage by mass: 30-55% of toughening agent, 40-60% of titanium dioxide, 4-6% of dispersing agent and 0.5-1% of antioxidant.

Furthermore, the toughening agent is one or a mixture of two of a styrene-butadiene block copolymer and a hydrogenated styrene-butadiene block copolymer, and has good temperature resistance and aging resistance besides the toughening performance.

Further, the dispersing agent is one or more of ethylene bis stearamide, high-melting-point paraffin and sodium stearate.

Further, the antioxidant is one or more of antioxidant 168, antioxidant 264, antioxidant 1010 and antioxidant 1076.

A preparation method of toughening color master batch for a liner material of a refrigerator comprises the following steps:

step one, putting a toughening agent, titanium dioxide, a dispersing agent and an antioxidant into a stirrer according to the raw material ratio and uniformly mixing;

and step two, feeding the mixture obtained in the step one into a double-screw extruder for melt blending extrusion, cooling and granulation to prepare the toughening color master batch for the liner material of the refrigerator.

Wherein, when the double-screw extruder in the second step is blended and extruded, the temperature control range of the cylinder of the double-screw extruder is 175-215 ℃.

And C, controlling the temperature of a runner of the double-screw extruder within the range of 190-215 ℃ during blending extrusion of the double-screw extruder in the step II.

Wherein, when the double-screw extruder in the second step is blended and extruded, the temperature of the neck ring mold of the double-screw extruder is within the range of 190-225 ℃; the screw rotating speed of the double-screw extruder is 80-150 r/min.

The invention has the following beneficial effects:

the invention solves the problems that the elongation rate and ESCR performance of HIPS materials are reduced and the liner materials are not required to be granulated due to the direct recycling of the liner materials of the existing refrigerator in the extrusion of plates, and solves the problems of high granulation cost and accelerated aging and mechanical property degradation of the HIPS materials by secondary heating extrusion granulation.

Of course, it is not necessary for any product that implements the invention to achieve all of the above-described advantages at the same time.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, 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 obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.