CN112321982A - Ageing-resistant HIPS foamed plastic - Google Patents

Ageing-resistant HIPS foamed plastic Download PDF

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CN112321982A
CN112321982A CN202011234906.1A CN202011234906A CN112321982A CN 112321982 A CN112321982 A CN 112321982A CN 202011234906 A CN202011234906 A CN 202011234906A CN 112321982 A CN112321982 A CN 112321982A
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aging
parts
agent
hips
resistant
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姜丽丽
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    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
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    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
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    • C08J2203/00—Foams characterized by the expanding agent
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Abstract

The invention discloses an anti-aging HIPS foamed plastic and a preparation method thereof, wherein the anti-aging HIPS foamed plastic comprises the following raw materials: HIPS, PMMA, PVC, inorganic aging resistant agent, organic aging resistant agent, foaming agent, filler, antioxidant and processing aid. The invention provides an aging-resistant HIPS foamed plastic and a preparation method thereof, and the prepared product has excellent aging resistance on the premise of not reducing the impact resistance by optimizing components and dosage.

Description

Ageing-resistant HIPS foamed plastic
Technical Field
The invention belongs to the technical field of polymers, and particularly relates to an aging-resistant HIPS foamed plastic.
Background
The continuous bulk polymerization method of rubber graft toughened polystyrene polymer, i.e. HIPS resin, is characterized by that it uses polybutadiene rubber or butadiene-styrene copolymer rubber as toughening agent, and according to a certain proportion the toughening agent is dissolved in styrene and/or proper quantity of solvent, and adopts the thermal initiation or initiator initiation method to prepare the invented product. The kinetics of polymerization in the preparation of HIPS resins by thermal initiation in bulk is described in detail in the literature (PengFM. polytadiaene grafting and crosslinking in high-impact polystyrene bulk thermal process. journal of Applied Polymer Science,1990,40(7-8): 1289-1302). CN1609126A adopts special structural rubber as a toughening agent to prepare HIPS resin with microscopic morphology of a pebble-bed stacking structure and excellent comprehensive mechanical properties. The resin not only has certain rigidity, hardness and processing fluidity, but also has the characteristics of stable size, low-temperature resistance, toughness and good colorability, is a plastic variety with relatively excellent comprehensive performance, and is widely applied to the fields of electronics, electric appliances, communication, instruments, building materials, textiles, automobile parts, office machinery and the like. With the development of plastic materials and products thereof and the continuous expansion of application range, higher requirements are put forward on the durability of HIPS.
However, after the HIPS product is subjected to the action of sunlight, heat and oxygen outdoors for a long time, the HIPS product can generate the phenomena of yellowing, embrittlement, cracking, surface gloss loss, great reduction of mechanical property and the like, and finally loses the use value. The reason is that the double bond contained in the butadiene component of HIPS molecules is easy to be oxidized and degraded under the action of ultraviolet rays, so that the weatherability of the HIPS molecules is poor, and the structure of the HIPS molecules is changed along with the prolonging of time in the processes of storage, forming and use, so that the physical and mechanical properties of the HIPS molecules are deteriorated. Yellowing of the product is a result of the formation of chromophoric groups such as carbonyl groups in the HIPS polymer, which means the cleavage of the polymer chain and the formation of polar groups, and the above change is accelerated with an increase in ambient temperature, and the screening is a sharp decrease in impact strength at the early stage of aging.
Therefore, there is a high necessity for a HIPS resin composition having excellent aging resistance without deteriorating impact resistance.
Disclosure of Invention
The invention provides an aging-resistant HIPS foamed plastic and a preparation method thereof, and the prepared product has excellent aging resistance on the premise of not reducing the impact resistance by optimizing components and dosage.
In order to solve the technical problems, the invention adopts the following technical scheme:
the aging-resistant HIPS foamed plastic is characterized by comprising the following raw materials in parts by mass: HIPS, PMMA, PVC, inorganic aging resistant agent, organic aging resistant agent, foaming agent, filler, antioxidant and processing aid; the inorganic anti-aging agent is prepared by compounding conductive copper powder and nano lanthanum oxide with red mud according to the mass ratio of (2-4) to (0.2-0.4) to (4-8), and the organic anti-aging agent is prepared by compounding tetrabromobisphenol A and o-hydroxybenzophenone according to the mass ratio of 1: 2-4; the foaming agent is azodicarbonamide and hollow fibers according to the weight ratio of (2-4): 1 in a ratio of 1.
Further, the aging-resistant HIPS foamed plastic comprises the following raw materials in parts by mass: HIPS60-80 parts, PMMA10-20 parts, PVC10-20 parts, inorganic aging resistant agent 3-6 parts, organic aging resistant agent 3-6 parts, foaming agent 5-15 parts, filler 1-3 parts, antioxidant 0.1-1 part and processing aid 1-3 parts.
Further, the inorganic aging resistant agent is prepared by compounding conductive copper powder, nano lanthanum oxide and red mud according to the mass ratio of 3:0.3: 6.
Further, the foaming agent is azodicarbonamide and hollow fibers, and the weight ratio of the foaming agent to the hollow fibers is 3: 1 in a ratio of 1.
Further, the hollow fiber is a nylon 66 fiber with a hollow rate of 30-60%.
Further, the processing aid is one or a mixture of more of stearamide lubricants, silicone oil and white mineral oil.
Further, the antioxidant is a multi-hindered phenol antioxidant.
Further, the filler is at least one of talcum powder, zinc oxide, calcium stearate and antimony trioxide.
The preparation method of the aging-resistant HIPS foamed plastic is characterized by comprising the following steps:
(1) adding HIPS, PMMA, an antibacterial agent, a composite flame retardant, a flame retardant synergist, an antioxidant and a processing aid into a mixer, and stirring for 1-3 minutes to obtain a mixed raw material;
(2) putting the mixed raw materials in the step 2 and the mixed products in the step 1 into a double-screw extruder for reaction, keeping the materials in a machine barrel for 1-2min to obtain reaction products,
(3) and extruding the materials in the double-screw extruder into a HIPS foaming forming mold, maintaining the pressure for 1 minute, and taking out the HIPS foaming forming part after the mold is cooled.
Further, the temperatures of the zones of the twin-screw extruder are as follows: the first zone is 180-class at 200 ℃, the second zone is 200-class at 220 ℃, the third zone is 200-class at 220 ℃, the fourth zone is 200-class at 220 ℃, the fifth zone is 200-class at 220 ℃, the sixth zone is 200-class at 220 ℃, the seventh zone is 200-class at 220 ℃, the eighth zone is 200-class at 220 ℃, the ninth zone is 200-class at 220 ℃, and the head is 200-class at 210 ℃.
The invention has the following beneficial effects:
the aging-resistant HIPS foamed plastic takes HIPS as a base material, a certain amount of PMMA and PVC are compounded, and the HIPS is modified, so that the impact property is not reduced when other components are added, and the aging resistance is synergistically improved.
In the invention, specific inorganic aging resistant agent and organic aging resistant agent are added. The inorganic anti-aging agent is prepared by compounding conductive copper powder, nano lanthanum oxide and red mud according to a certain mass ratio. Through the mutual synergistic effect of the three components, the electromagnetic shielding effect of the copper powder, the photoelectric effect of the nano rare earth and the shielding effect of the red mud, the aging resistance is improved. The organic aging-resistant agent is obtained by compounding tetrabromobisphenol A and o-hydroxy benzophenone according to a certain mass ratio, and absorbs light emitted into the resin and reflected by the resin. Through the cooperation of the inorganic and organic anti-aging agents, the impact performance is not reduced, and the anti-aging performance is synergistically improved.
The foaming agent disclosed by the invention is azodicarbonamide and hollow fibers in a certain proportion to realize foaming, the azodicarbonamide is a traditional foaming agent, air in the hollow fibers is discharged in extrusion to form gaps, and the azodicarbonamide has a certain mechanical enhancement effect on foamed plastics, so that efficient foaming is realized, and the impact property is not reduced.
The aging-resistant HIPS foamed plastic disclosed by the invention takes HIPS as a base material, a certain amount of PMMA and PVC are compounded, and then a specific inorganic aging resistant agent, an organic aging resistant agent and a foaming agent are added, so that the prepared product has excellent aging resistance.
Detailed Description
In order to facilitate a better understanding of the invention, the following examples are given to illustrate, but not to limit the scope of the invention.
The following is a more specific example.
The aging-resistant HIPS foamed plastic is characterized by comprising the following raw materials in parts by mass: HIPS60-80 parts, PMMA10-20 parts, PVC10-20 parts, inorganic aging resistant agent 3-6 parts, organic aging resistant agent 3-6 parts, foaming agent 5-15 parts, filler 1-3 parts, antioxidant 0.1-1 part and processing aid 1-3 parts; the inorganic anti-aging agent is prepared by compounding conductive copper powder and nano lanthanum oxide with red mud according to the mass ratio of (2-4) to (0.2-0.4) to (4-8), and the organic anti-aging agent is prepared by compounding tetrabromobisphenol A and o-hydroxybenzophenone according to the mass ratio of 1: 2-4; the foaming agent is azodicarbonamide and hollow fibers according to the weight ratio of (2-4): 1 in a ratio of 1.
The hollow fiber is a nylon 66 fiber with a hollow rate of 30-60%. The processing aid is one or a mixture of more of stearamide lubricants, silicone oil and white mineral oil. The antioxidant is a multi-element hindered phenol antioxidant. The filler is at least one of talcum powder, zinc oxide, calcium stearate and antimony trioxide.
The preparation method of the aging-resistant HIPS foamed plastic is characterized by comprising the following steps: (1) adding HIPS, PMMA, an antibacterial agent, a composite flame retardant, a flame retardant synergist, an antioxidant and a processing aid into a mixer, and stirring for 1-3 minutes to obtain a mixed raw material;
(2) putting the mixed raw materials in the step 2 and the mixed products in the step 1 into a double-screw extruder for reaction, and allowing the materials to stay in a machine barrel for 1-2min to obtain reaction products, wherein the temperature of each zone of the double-screw extruder is as follows: the first zone is 180-class at 200 ℃, the second zone is 200-class at 220 ℃, the third zone is 200-class at 220 ℃, the fourth zone is 200-class at 220 ℃, the fifth zone is 200-class at 220 ℃, the sixth zone is 200-class at 220 ℃, the seventh zone is 200-class at 220 ℃, the eighth zone is 200-class at 220 ℃, the ninth zone is 200-class at 220 ℃, and the head is 200-class at 210 ℃.
(3) And extruding the materials in the double-screw extruder into a HIPS foaming forming mold, maintaining the pressure for 1 minute, and taking out the HIPS foaming forming part after the mold is cooled.
Example 1
The aging-resistant HIPS foamed plastic is characterized by comprising the following raw materials in parts by mass: HIPS70 parts, PMMA15 parts, PVC15 parts, inorganic aging resistant agent 5 parts, organic aging resistant agent 5 parts, foaming agent 10 parts, filler 2 parts, antioxidant 0.5 part and processing aid 2 parts; the inorganic anti-aging agent is prepared by compounding conductive copper powder, nano lanthanum oxide and red mud according to the mass ratio of 3:0.3:6, and the organic anti-aging agent is prepared by compounding tetrabromobisphenol A and o-hydroxybenzophenone according to the mass ratio of 1: 3; the foaming agent is azodicarbonamide and hollow fibers, and the weight ratio of the foaming agent to the hollow fibers is 3: 1 in a ratio of 1.
The hollow fiber has a hollow ratio of 50% nylon 66 fiber. The processing aid is a stearamide lubricant. The antioxidant is a multi-element hindered phenol antioxidant. The filler is talcum powder.
The preparation method of the aging-resistant HIPS foamed plastic is characterized by comprising the following steps: (1) adding HIPS, PMMA, an antibacterial agent, a composite flame retardant, a flame retardant synergist, an antioxidant and a processing aid into a mixer, and stirring for 1-3 minutes to obtain a mixed raw material;
(2) putting the mixed raw materials in the step 2 and the mixed products in the step 1 into a double-screw extruder for reaction, and allowing the materials to stay in a machine barrel for 1-2min to obtain reaction products, wherein the temperature of each zone of the double-screw extruder is as follows: the first zone is 180-class at 200 ℃, the second zone is 200-class at 220 ℃, the third zone is 200-class at 220 ℃, the fourth zone is 200-class at 220 ℃, the fifth zone is 200-class at 220 ℃, the sixth zone is 200-class at 220 ℃, the seventh zone is 200-class at 220 ℃, the eighth zone is 200-class at 220 ℃, the ninth zone is 200-class at 220 ℃, and the head is 200-class at 210 ℃.
(3) And extruding the materials in the double-screw extruder into a HIPS foaming forming mold, maintaining the pressure for 1 minute, and taking out the HIPS foaming forming part after the mold is cooled.
Example 2
The aging-resistant HIPS foamed plastic is characterized by comprising the following raw materials in parts by mass: HIPS60 parts, PMMA20 parts, PVC10 parts, inorganic aging resistant agent 6 parts, organic aging resistant agent 3 parts, foaming agent 15 parts, filler 1 part, antioxidant 1 part and processing aid 1 part; the inorganic anti-aging agent is prepared by compounding conductive copper powder, nano lanthanum oxide and red mud according to the mass ratio of 4:0.2:8, and the organic anti-aging agent is prepared by compounding tetrabromobisphenol A and o-hydroxybenzophenone according to the mass ratio of 1: 2; the foaming agent is azodicarbonamide and hollow fibers, and the weight ratio of the foaming agent to the hollow fibers is 4: 1 in a ratio of 1.
The hollow fiber is a nylon 66 fiber having a hollow rate of 30%. The processing aid is one or a mixture of more of stearamide lubricants, silicone oil and white mineral oil. The antioxidant is a multi-element hindered phenol antioxidant. The filler is zinc oxide.
The preparation method is the same as that of example 1.
Example 3
The aging-resistant HIPS foamed plastic is characterized by comprising the following raw materials in parts by mass: HIPS80 parts, PMMA10 parts, PVC20 parts, inorganic aging resistant agent 3 parts, organic aging resistant agent 6 parts, foaming agent 5 parts, filler 3 parts, antioxidant 0.1 part and processing aid 3 parts; the inorganic anti-aging agent is prepared by compounding conductive copper powder, nano lanthanum oxide and red mud according to the mass ratio of 2:0.4:4, and the organic anti-aging agent is prepared by compounding tetrabromobisphenol A and o-hydroxybenzophenone according to the mass ratio of 1: 4; the foaming agent is azodicarbonamide and hollow fibers, and the weight ratio of the foaming agent to the hollow fibers is 2: 1 in a ratio of 1.
The hollow fiber is a nylon 66 fiber having a hollow ratio of 60%. The processing aid is silicone oil. The antioxidant is a multi-element hindered phenol antioxidant. The filler is antimony trioxide.
The preparation method is the same as that of example 1.
Comparative example 1
The process was essentially the same as in example 1, except that PMMA, PVC were absent from the raw materials used to make the aging resistant HIPS foamed plastic.
Comparative example 2
The procedure was essentially the same as in example 1, except that PMMA was absent from the raw materials used to make the aging resistant HIPS foamed plastic.
Comparative example 3
The preparation process is basically the same as that of example 1, except that the antibacterial agent in the raw material for preparing the aging-resistant HIPS foamed plastic is PVC.
Comparative example 4
The preparation process is basically the same as that of example 1, except that the raw materials for preparing the aging-resistant HIPS foamed plastic lack inorganic aging resistant agents and organic aging resistant agents.
Comparative example 5
The process was essentially the same as in example 1, except that the inorganic weathering agent was absent from the raw materials used to make the weatherable HIPS foamed plastic.
Comparative example 6
The process was essentially the same as that used in example 1, except that the inorganic weathering agent in the raw materials used to make the weatherable HIPS foamed plastic was absent of conductive copper powder.
Comparative example 7
The preparation process is basically the same as that of example 1, except that the inorganic aging resistant agent in the raw material for preparing the aging resistant HIPS foamed plastic lacks nano lanthanum oxide.
Comparative example 8
The preparation process is basically the same as that of example 1, except that red mud is absent in the inorganic aging resistant agent in the raw material for preparing the aging resistant HIPS foamed plastic.
Comparative example 9
The procedure was essentially the same as in example 1, except that the blowing agent was azodicarbonamide as the starting material for the preparation of the aging resistant HIPS foamed plastic.
Comparative example 10
The process was essentially the same as in example 1, except that the blowing agent was hollow fibers as the starting material for the preparation of the aging resistant HIPS foamed plastic.
Pressing the products prepared in the above examples and comparative examples into plates to prepare plastic samples of 50mm × 50mm, wherein the aging resistance is as follows: the samples of the examples and comparative examples were subjected to a tensile test after irradiating them for 2500 hours under an ultraviolet lamp of the same power. The tensile test was performed according to ASTM D-638, and the test results are as follows.
Figure 947766DEST_PATH_IMAGE001
From the above table, it can be seen that: as can be seen from the data of the examples 1-3 and the comparative examples 1-10, the aging-resistant HIPS foamed plastic disclosed by the invention has the advantages that HIPS is taken as a base material, a certain amount of PMMA and PVC are compounded, and then a specific inorganic aging resistant agent, an organic aging resistant agent and a foaming agent are added, so that the prepared product has excellent aging resistance.
The above description should not be taken as limiting the invention to the embodiments, but rather, as will be apparent to those skilled in the art to which the invention pertains, numerous simplifications or substitutions may be made without departing from the spirit of the invention, which shall be deemed to fall within the scope of the invention as defined by the claims appended hereto.

Claims (1)

1. The aging-resistant HIPS foamed plastic is characterized by comprising the following raw materials in parts by mass: HIPS70 parts, PMMA15 parts, PVC15 parts, inorganic aging resistant agent 5 parts, organic aging resistant agent 5 parts, foaming agent 10 parts, filler 2 parts, antioxidant 0.5 part and processing aid 2 parts; the inorganic anti-aging agent is prepared by compounding conductive copper powder, nano lanthanum oxide and red mud according to the mass ratio of 3:0.3:6, and the organic anti-aging agent is prepared by compounding tetrabromobisphenol A and o-hydroxybenzophenone according to the mass ratio of 1: 3; the foaming agent is azodicarbonamide and hollow fibers, and the weight ratio of the foaming agent to the hollow fibers is 3: 1 is added in a proportion of;
nylon 66 fibers having a hollow rate of 50%; the processing aid is a stearamide lubricant; the antioxidant is a multi-element hindered phenol antioxidant; the filler is talcum powder.
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CN110481125A (en) * 2019-07-11 2019-11-22 海信（山东）冰箱有限公司 One kind can plastic uptake plate and preparation method thereof, liner and refrigeration equipment
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CN102070853A (en) * 2011-01-05 2011-05-25 广州市波斯塑胶颜料有限公司 Foamed polystyrene curtain plate sheet and manufacturing method thereof
CN104844988A (en) * 2015-05-29 2015-08-19 合肥得润电子器件有限公司 Anti-aging fluororubber modified PVC (polyvinyl chloride) cable material for automobile wire harnesses and preparation method thereof
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CN101921445A (en) * 2010-08-17 2010-12-22 王崇高 Production formulation of HIPS (High Impact Polystyrene) foaming material and making method thereof
CN102070853A (en) * 2011-01-05 2011-05-25 广州市波斯塑胶颜料有限公司 Foamed polystyrene curtain plate sheet and manufacturing method thereof
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