CN111607161B - Special material for high glow wire wall switch panel - Google Patents

Special material for high glow wire wall switch panel Download PDF

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CN111607161B
CN111607161B CN202010400883.0A CN202010400883A CN111607161B CN 111607161 B CN111607161 B CN 111607161B CN 202010400883 A CN202010400883 A CN 202010400883A CN 111607161 B CN111607161 B CN 111607161B
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polypropylene
switch panel
wall switch
special material
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CN111607161A (en
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柯寒文
吕小兵
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Zhejiang Delixi International Electrical Co ltd
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Zhejiang Delixi International Electrical Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/14—Copolymers of propene
    • C08L23/142—Copolymers of propene at least partially crystalline copolymers of propene with other olefins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/02—Flame or fire retardant/resistant
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/10—Transparent films; Clear coatings; Transparent materials
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend

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  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
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  • Organic Insulating Materials (AREA)

Abstract

The invention discloses a special material for a high glow wire wall switch panel, which is prepared from the following raw materials in parts by weight: 80-100 parts of co-polypropylene, 60-80 parts of homo-polypropylene, 60-80 parts of cyclic olefin polymer with branched chains, 20-40 parts of brominated aliphatic flame retardant and 1-5 parts of anti-yellowing and anti-aging auxiliary agent. The composite material prepared by the invention has the performances of solvent resistance and yellowing resistance, and has good heat resistance and flame retardance.

Description

Special material for high glow wire wall switch panel
Technical Field
The invention relates to the technical field of composite materials, in particular to a special material for a high glow wire wall switch panel.
Background
At present, the raw materials used for wall switches are generally polycarbonate PC or ABS and alloy materials of the polycarbonate PC or ABS, and although the polycarbonate can be used as a transparent shell, the polycarbonate has higher price and poor solvent resistance, if the polycarbonate is required to be normally used, the polycarbonate needs to be modified, but the transparency and the impact property of the polycarbonate are greatly influenced, and meanwhile, because the processing property of the polycarbonate is poor, a welding line is often generated when the polycarbonate meets a hole structure, so that the aesthetic degree is influenced. How to solve the technical problems and provide a composite material with low cost, solvent resistance, yellowing resistance, good mechanical properties and good heat resistance is a matter which is addressed by the technical personnel in the field.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a special material for a high glow wire wall switch panel, which has the advantages of low cost, solvent resistance, yellowing resistance, good mechanical property, good heat resistance and good flame retardant property.
In order to achieve the purpose, the invention adopts the technical scheme that: the special material for the high glow wire wall switch panel is prepared from the following raw materials in parts by weight: 80-100 parts of copolymerized polypropylene, 60-80 parts of homopolymerized polypropylene, 60-80 parts of branched chain cyclic olefin polymer, 20-40 parts of bromine-containing aliphatic flame retardant and 1-5 parts of yellowing-resistant and aging-resistant auxiliary agent.
Preferably, the melt index of the copolymerized polypropylene is in the range of 10-15g/10min (230 ℃ C. By 2.16 kg), the EPR content is controlled to be 18-22%, and the PP-s-PE component content in the EPR is not less than 5%.
The EPR (ethylene propylene rubber) content and the PP-s-PE (ethylene propylene short block) component content in the EPR can enable the polymer to have good impact performance, and the requirements of drop resistance and impact hammers when the wall switch is used are met. If the content of the two components is too low, the steel plate can crack when falling and the impact hammer test required by national standard cannot pass. Too high a content may affect the melting fingers of the material, resulting in the appearance of the material being affected by weld lines.
Preferably, the homopolypropylene has a melt index in the range of 10-15g/10min (230 ℃ C. About.2.16 kg) and an isotactic index of not less than 96%. The higher isotactic index enables the material to have certain rigidity and heat resistance, thereby ensuring that the material passes a heat resistance test.
Preferably, the branched cyclic olefin polymer is a bicycloheptadiene polymer with two identical branches, the monomer chemical formula of the polymer is as follows,
Figure GDA0003949176880000021
wherein R1 and R2 are branched chain alkenyl with 8-10 carbons.
The branched cyclic olefin polymer has good transparency due to the amorphous property, the long olefin branched chain ensures that the branched cyclic olefin polymer has good compatibility with the polypropylene copolymer and the polypropylene homopolymer, and the branched chain is too short, which can cause the separation of micro-phase state, and the material is brittle. Too long a branch affects processability and flowability of the material. Meanwhile, the cyclic structure of the cycloolefin hinders the molecular chain movement of the co-polypropylene and the homo-polypropylene, so that the crystallinity of the PP (polypropylene) is partially reduced, and the transparency is improved.
Preferably, the bromine-containing aliphatic flame retardant is prepared by mixing 1,2-bis (dibromonorbornenyl dicarboximide) ethane and 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane according to a mass ratio of 1:1.
The brominated aliphatic flame retardant has high activity, and can generate bromine free radicals at relatively low temperature so as to generate corresponding flame retardant effect. Norbornene and ethyl structures in the two selected flame retardants have hydrocarbon sequences close to those of polypropylene, so that fogging caused by the flame retardants is avoided, and efficient bromine of the flame retardants can meet the mandatory requirement of GWFI 960 ℃ required by the switch panel material.
Preferably, the anti-yellowing and aging-resistant additive is prepared by mixing hydroxyphenyl hindered phenol, 2,2,6,6-tetramethyl-4-piperidinol stearate and tris (2,4-di-tert-butylphenyl) phosphite according to a mass ratio of 1. Compared with common stearic phenol, the hydroxyphenyl hindered phenol has better yellowing resistance, and the yellowing index is about 50 percent of that of the stearic phenol. In addition, the combination of phosphites with methylpiperidines gives polymers having good resistance to outdoor light ageing.
Preferably, the hydroxyphenyl hindered phenol is 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the special material for the high glow wire wall switch panel is prepared by mixing the copolymerization polypropylene, the homopolymerization polypropylene and the cyclic olefin polymer with the branched chain, wherein the EPR content of the copolymerization polypropylene and the PP-s-PE component content in the copolymerization polypropylene are adjusted to ensure that the polymer has good impact property, and the isotactic index of the homopolymerization polypropylene is adjusted to ensure that the polymer has excellent heat resistance; the adopted cyclic olefin polymer with the branched chain can be well compatible with the copolymerization polypropylene and the homopolymerization polypropylene, so that the transparency of the polymer is improved, and the burning wire test of the polymer meets the GWFI 960 ℃ requirement by adopting the brominated aliphatic flame retardant.
Detailed Description
The technical solution of the present invention is further illustrated below with reference to specific examples.
The special material for the high glow wire wall switch panel is prepared from the following raw materials in parts by weight: 80-100 parts of copolymerized polypropylene, 60-80 parts of homopolymerized polypropylene, 60-80 parts of branched chain cyclic olefin polymer, 20-40 parts of bromine-containing aliphatic flame retardant and 1-5 parts of yellowing-resistant and aging-resistant auxiliary agent.
Wherein the melt index range of the copolymerized polypropylene is 10-15g/10min (230 ℃ C. By 2.16 kg), the EPR content is controlled to be 18-22%, and the PP-s-PE component content in the EPR is not less than 5%.
The melt index range of the homopolymerized polypropylene is 10-15g/10min (230 ℃ C. By 2.16 kg), and the isotactic index is not less than 96%.
The branched cyclic olefin polymer is a bicycloheptadiene polymer with two identical branches, and the monomer chemical formula of the polymer is as follows,
Figure GDA0003949176880000031
wherein R1 and R2 are branched chain alkenyl with 8-10 carbons.
The brominated aliphatic flame retardant is prepared by mixing 1,2-bis (dibromo norbornenyl dicarboximide) ethane and 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane according to the mass ratio of 1:1.
The anti-yellowing aging auxiliary agent is prepared by mixing hydroxyphenyl hindered phenol, 2,2,6,6-tetramethyl-4-piperidinol stearate and tris (2,4-di-tert-butylphenyl) phosphite according to a mass ratio of 1. The hydroxyphenyl hindered phenol is 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene.
Example 1
The embodiment provides a special material for a high glow wire wall switch panel, which is prepared from the following raw materials in parts by weight: 80 parts of copolymerized polypropylene, 60 parts of homopolymerized polypropylene, 60 parts of branched cyclic olefin polymer, 10 parts of 1,2-bis (dibromonorbornenyl dicarboximide) ethane, 10 parts of 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane and 1 part of anti-yellowing and aging-resistant additive.
Example 2
The embodiment provides a special material for a high glow wire wall switch panel, which is prepared from the following raw materials in parts by weight: 100 parts of copolymerized polypropylene, 80 parts of homopolymerized polypropylene, 80 parts of branched cyclic olefin polymer, 20 parts of 1,2-bis (dibromonorbornenyl dicarboximide) ethane, 20 parts of 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane and 5 parts of anti-yellowing and aging-resistant auxiliary agent.
Example 3
The embodiment provides a special material for a high glow wire wall switch panel, which is prepared from the following raw materials in parts by weight: 80 parts of copolymerized polypropylene, 70 parts of homopolymerized polypropylene, 70 parts of branched cyclic olefin polymer, 15 parts of 1,2-bis (dibromonorbornenyl dicarboximide) ethane, 15 parts of 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane and 3 parts of anti-yellowing and aging-resistant auxiliary agent.
Example 4
The embodiment provides a special material for a high glow wire wall switch panel, which is prepared from the following raw materials in parts by weight: 80 parts of copolymerized polypropylene, 60 parts of homopolymerized polypropylene, 60 parts of branched cyclic olefin polymer, 20 parts of 1,2-bis (dibromonorbornenyl dicarboximide) ethane, 20 parts of 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane and 3 parts of anti-yellowing and aging-resistant auxiliary agent.
Comparative example 1
The embodiment provides a special material for a wall switch panel, which is prepared from the following raw materials in parts by weight: 100 parts of polycarbonate, 5 parts of sulfonate and silicon flame retardant.
Comparative example 2
The embodiment provides a special material for a wall switch panel, which is prepared from the following raw materials in parts by weight: 100 parts of polypropylene copolymer, 80 parts of polypropylene homopolymer, 15 parts of decabromodiphenylethane flame retardant and Sb 2 O 3 And 3 parts.
The specific formulations of examples 1 to 4 and comparative examples 1 and 2 are shown in Table 1.
TABLE 1
Figure GDA0003949176880000041
The preparation method of the special material for the high glow wire wall switch panel comprises the following steps: the raw materials are weighed according to the proportion in the table 1, then the raw materials are put into a low-speed mixer to be stirred for 2 minutes, all the components are uniformly mixed, and then the mixture is discharged and extruded by a double-screw extruder to be granulated to obtain the composite material. Wherein the processing temperature of the screw extruder is 160-170 ℃, the specific temperature setting is shown in Table 2, and the screw revolution is 30HZ.
TABLE 2 screw temperature set point
Temperature interval A segment of Two segment Three sections Four sections Five sections Six sections Seven segments Eight sections Nine sections
Setting temperature of 165 170 170 170 170 170 170 170 170
The performance of the composite material prepared by the method is detected, and the detection result is shown in table 3.
TABLE 3
Figure GDA0003949176880000051
From table 3, it can be seen that, compared with the comparative examples, the composite materials prepared by the formulations of examples 1 to 4 have better melt index, better yellowing resistance index and light transmittance, and better solvent resistance.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (3)

1. The special material for the high glow wire wall switch panel is characterized by being prepared from the following raw materials in parts by weight: 80-100 parts of copolymerized polypropylene, 60-80 parts of homopolymerized polypropylene, 60-80 parts of branched chain cyclic olefin polymer, 20-40 parts of bromine-containing flame retardant and 1-5 parts of anti-yellowing and anti-aging auxiliary agent; the melt index range of the copolymerized polypropylene at 230 ℃ under the condition of 2.16kg is 10-15g/10min, wherein the copolymerized polypropylene comprises 18-22% of ethylene-propylene rubber EPR, and the content of an ethylene-propylene short block PP-s-PE component in the EPR is not less than 5%;
the melt index range of the homopolymerized polypropylene at 230 ℃ and 2.16kg is 10-15g/10min, and the isotactic index is not less than 96%;
the branched cyclic olefin polymer is a bicycloheptadiene polymer with two same branches, and the monomer chemical formula of the polymer is as follows,
Figure FDA0003949176870000011
wherein R1 and R2 are branched chain alkenyl with 8-10 carbons;
the bromine-containing flame retardant is prepared by mixing 1,2-bis (dibromo norbornenyl dicarboximide) ethane and 1,2-dibromo-4- (1,2-dibromoethyl) cyclohexane according to the mass ratio of 1:1.
2. The special material for the high glow-wire wall switch panel according to claim 1, wherein the anti-yellowing aging auxiliary is prepared by mixing hydroxyphenyl hindered phenol, 2,2,6,6-tetramethyl-4-piperidinol stearate and tris (2,4-di-tert-butylphenyl) phosphite according to a mass ratio of 1.
3. The special material for the high glow wire wall switch panel according to claim 2, wherein said hydroxyphenyl hindered phenol is 1,3,5-trimethyl-2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) benzene.
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11254522A (en) * 1998-03-11 1999-09-21 Tokuyama Corp Polypropylene film
CN102964695A (en) * 2012-12-05 2013-03-13 上海日之升新技术发展有限公司 High glow-wire/high-CTI halogenous flame-retardant polypropylene composite and preparation method thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11254522A (en) * 1998-03-11 1999-09-21 Tokuyama Corp Polypropylene film
CN102964695A (en) * 2012-12-05 2013-03-13 上海日之升新技术发展有限公司 High glow-wire/high-CTI halogenous flame-retardant polypropylene composite and preparation method thereof

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