CN114621551B - Thermoplastic elastomer of transparent flame-retardant encapsulated PC material and preparation method thereof - Google Patents
Thermoplastic elastomer of transparent flame-retardant encapsulated PC material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 94
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000003063 flame retardant Substances 0.000 title claims abstract description 66
- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title abstract description 7
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 34
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 229920001400 block copolymer Polymers 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 29
- 229920001971 elastomer Polymers 0.000 claims abstract description 25
- 239000005060 rubber Substances 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 8
- 229920006465 Styrenic thermoplastic elastomer Polymers 0.000 claims abstract description 4
- 229920001577 copolymer Polymers 0.000 claims abstract description 4
- 239000004417 polycarbonate Substances 0.000 claims description 64
- 238000002834 transmittance Methods 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 239000012748 slip agent Substances 0.000 claims description 6
- 230000004075 alteration Effects 0.000 claims description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 claims description 4
- 239000004611 light stabiliser Substances 0.000 claims description 4
- 239000000314 lubricant Substances 0.000 claims description 4
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 238000005469 granulation Methods 0.000 claims description 3
- 230000003179 granulation Effects 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- 229920000388 Polyphosphate Polymers 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 claims description 2
- 239000001205 polyphosphate Substances 0.000 claims description 2
- 235000011176 polyphosphates Nutrition 0.000 claims description 2
- -1 wherein Substances 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 5
- 239000002861 polymer material Substances 0.000 abstract description 2
- 229920000515 polycarbonate Polymers 0.000 description 55
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 11
- FAIIFDPAEUKBEP-UHFFFAOYSA-N Nilvadipine Chemical compound COC(=O)C1=C(C#N)NC(C)=C(C(=O)OC(C)C)C1C1=CC=CC([N+]([O-])=O)=C1 FAIIFDPAEUKBEP-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000000806 elastomer Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 238000005538 encapsulation Methods 0.000 description 4
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 229920006351 engineering plastic Polymers 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000007790 scraping Methods 0.000 description 3
- 229920006272 aromatic hydrocarbon resin Polymers 0.000 description 2
- 238000010073 coating (rubber) Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 2
- 229920003225 polyurethane elastomer Polymers 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 229920006352 transparent thermoplastic Polymers 0.000 description 2
- 229920002633 Kraton (polymer) Polymers 0.000 description 1
- 239000004594 Masterbatch (MB) Substances 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007719 peel strength test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- AYEKOFBPNLCAJY-UHFFFAOYSA-O thiamine pyrophosphate Chemical compound CC1=C(CCOP(O)(=O)OP(O)(O)=O)SC=[N+]1CC1=CN=C(C)N=C1N AYEKOFBPNLCAJY-UHFFFAOYSA-O 0.000 description 1
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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
- C08L53/00—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L53/02—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes
- C08L53/025—Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers of vinyl-aromatic monomers and conjugated dienes modified
-
- 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
- C08L2201/10—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
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention relates to a thermoplastic elastomer of a transparent flame-retardant rubber-coated PC material and a preparation method thereof, belonging to the technical field of high polymer materials. The invention discloses a thermoplastic elastomer of a transparent flame-retardant rubber-coated PC material, which comprises the following raw materials in parts by weight: styrenic thermoplastic elastomer: 50-60 parts of an acrylic block copolymer: 20-30 parts of flame retardant: 20-25 parts of compatilizer: 3-5 parts of slipping agent: 0.1-1 part of UV resistant auxiliary agent: 0.1-0.5 part; the styrene thermoplastic elastomer is styrene-ethylene-butylene-styrene copolymer, wherein the styrene accounts for 18-22 percent; the flame retardant and the UV resistant auxiliary agent are liquid. The invention also discloses a preparation method of the thermoplastic elastomer of the transparent flame-retardant encapsulated PC material.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and relates to a thermoplastic elastomer of a transparent flame-retardant rubber-coated PC material and a preparation method thereof.
Background
The Polycarbonate (PC) material is a general engineering plastic, has excellent mechanical, electric and heat resistance, and particularly has high light transmittance, and is the fastest growing general engineering plastic in five engineering plastics. PC materials are widely used in the fields of household appliances, office appliances, medical appliances, automobile parts and the like. However, PC materials have poor low-temperature toughness and are easy to crack, so that the application range of the PC materials is limited. The PC is coated with the thermoplastic elastomer material, so that the PC has strong anti-falling property and shock resistance, provides comfortable and soft touch feeling for products, is anti-skid and durable.
The difference between the elastomer of the encapsulated PC material and the conventional elastomer is that the elastomer of the encapsulated PC material can be directly bonded to PC, and the more compatible the two materials are, the more closely polar the more easily the encapsulated PC material is bonded. At present, most of the rubber-coated PC materials adopt polyurethane elastomers, but TPU processing windows are narrow, molding time is long, and molding difficulty of pure TPU rubber-coated PC is high. For example, china patent application (publication No. CN 106832184A) discloses that the organosilicon polyurethane elastomer can be used for encapsulating PC and other materials, but the process is complicated and the thermal stability is poor. In China patent application (publication No. CN 109851977A), the PC material is encapsulated in the form of SEBS+white oil+compatilizer+TPU+auxiliary agent+filler, and the problems of processing, encapsulation and the like of the TPU material are solved, but the transparency of the encapsulated material cannot be realized from the point of view of a polymerization end or a modified end. Accordingly, TPEs having both plastic and rubber properties have been studied for use as encapsulants. For example, chinese patent application publication No. CN110628165A discloses a semitransparent thermoplastic elastomer for encapsulating PC and ABS, which comprises styrene elastomer, white oil and aromatic hydrocarbon resin as main components, wherein the white oil and the aromatic hydrocarbon resin respectively cause the reduction of scratch resistance and ageing resistance of the material, and the light transmittance is only 60%.
The types of transparent thermoplastic elastomer encapsulated PC materials on the market at present are not more, and the transparent thermoplastic elastomer encapsulated PC materials have a certain flame retardant property, which is less. Therefore, there is a need for a thermoplastic elastomer for transparent flame retardant encapsulated PC materials that provides more options for the encapsulation industry, which can not only embody the original design of the internal PC material, but also achieve flame retardance and improved safety.
Disclosure of Invention
The present invention has been made in view of the above problems occurring in the prior art, and an object of the present invention is to provide a thermoplastic elastomer for a transparent flame retardant type encapsulated PC material having good light transmittance and mechanical properties, and having good peel strength after encapsulating the PC material.
The aim of the invention can be achieved by the following technical scheme:
the thermoplastic elastomer of the transparent flame-retardant type encapsulated PC material comprises the following raw materials in parts by weight:
styrenic thermoplastic elastomer: 50-60 parts of a lubricant, wherein the lubricant comprises,
acrylic block copolymer: 20-30 parts of a base material, wherein,
flame retardant: 20-25 parts of a compound containing,
and (3) a compatilizer: 3-5 parts of a base material, wherein the base material comprises,
slip agent: 0.1-1 part of the total weight of the components,
UV resistant auxiliary: 0.1-0.5 part;
the styrene thermoplastic elastomer is styrene-ethylene-butylene-styrene copolymer (SEBS), wherein the styrene accounts for 18-22 percent;
the flame retardant and the UV resistant auxiliary agent are liquid.
In the preparation process of the traditional thermoplastic elastomer, white oil or filling oil is mostly needed to be added as a plasticizer or a processing aid, and the white oil is needed to be filled for processing due to the high styrene content in the conventional SEBS; the invention directly adopts the SEBS with low styrene content and styrene accounting for 18-22 percent, eliminates white oil, ensures the processability and fluidity of the material, avoids the addition of plasticizer, and improves the scratch resistance of the material; the acrylic block copolymer with the refractive index close to that of SEBS is used as the auxiliary material, and the transparency of the finished product material is higher. And the acrylic block copolymer has carbonyl groups, so that the acrylic block copolymer has strong adhesion to PC materials, and can better encapsulate the PC materials. The thermoplastic elastomer of the transparent flame-retardant rubber-coated PC material prepared by the invention has light transmittance of more than 70 percent, because the light transmittance of the selected acrylic block copolymer is higher; and the flame retardant and the UV resistant auxiliary agent are required to be transparent liquid, and the transparency is affected by the common solid flame retardant and the UV resistant auxiliary agent.
Preferably, the acrylic block copolymer is an acrylic block copolymer (polymethyl methacrylate block copolymer).
More preferably, the acrylic block copolymer has a light transmittance (3 mm) > 91%.
More preferably, the hard segment of the acrylic block copolymer is PMMA and the soft segment is PnBA.
Preferably, the acrylic block copolymer is a polar material LA series, and includes one or more of LA4285 (shore hardness 95A), LA2250 (shore hardness 65A), and LA2140 (shore hardness 32A).
Compared with the conventional polar resins such as ethylene-vinyl acetate copolymer (EVA) and ethylene-methyl acrylate copolymer (EMA), the acrylic block copolymer selected by the invention can be better compatible with other components, so that the bonding capability with PC materials is improved.
Further preferably, the acrylic block copolymer has a mass ratio of 1: (0.8-1.2) LA4285, LA 2140.
The acrylic block copolymer can be combined by a plurality of LA series raw materials, the hardness range is regulated to 40-85A, and the addition of the composition can effectively enhance the peeling strength and the light transmittance.
Preferably, the flame retardant comprises a polyphosphate high efficiency flame retardant.
Further preferably, the viscosity of the flame retardant is 15000-19000 (25 ℃ C., mPa.s) and the phosphorus content is 8-10%.
Preferably, the compatilizer is ethylene acrylic acid copolymer, and the acrylic acid content is 10-15%.
Preferably, the UV resistant aid comprises a light stabilizer.
Further preferably, the light stabilizer comprises one or more of UV292, HS-C102, tinuvin B75.
The invention selects the liquid light stabilizer, and reduces the influence on transparency while ensuring stability.
Preferably, the slipping agent is polyethylene glycol with a molecular weight of 360-440.
Further preferably, the slip agent is PEG-400.
According to the invention, the slipping agent polyethylene glycol is added to ensure the slipping property of the material on one hand, and the polarity of the material is improved on the other hand, so that the material is better combined with the polar material LA series.
The invention also discloses a preparation method of the thermoplastic elastomer of the transparent flame-retardant encapsulated PC material, which comprises the following steps: weighing the raw materials according to the parts by weight, adding the raw materials into a mixer for premixing, then adding the raw materials into a feeding system of a double-screw extruder, uniformly adding a flame retardant through a melt pump, and carrying out melt extrusion granulation to obtain the thermoplastic elastomer material, wherein the rotating speed of a host machine is 300-400r/min, and the processing temperature of each region is 180-220 ℃.
Preferably, the speed of the pre-stirring process is 400-800r/min, and the time is 3-4min.
The invention also discloses the use of the thermoplastic elastomer of the transparent flame retardant encapsulated PC material in the encapsulated PC material, wherein the use comprises the step of adhering the thermoplastic elastomer of the transparent flame retardant encapsulated PC material to a PC framework at 190-210 ℃ through injection molding. The acrylic block copolymer with carbonyl groups is selected from the raw materials of the thermoplastic elastomer for preparing the transparent flame-retardant rubber-coated PC material, and has stronger adhesiveness to the PC material, so that the thermoplastic elastomer has better bonding force. The transparent flame-retardant encapsulated PC material prepared by the invention has the advantages that the thermoplastic elastomer encapsulated PC material can embody the original design structure of the internal PC material, realize flame retardance and improve the safety.
The thermoplastic elastomer of the transparent flame-retardant rubber-coated PC material is applied to the rubber-coated PC material, the peel strength of a finished product is more than or equal to 4.0KN/m, and the rubber-coated adhesive effect is excellent; the light transmittance is more than 70%; the chromatic aberration delta L is less than 1; the flame retardant rating reaches V0.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts SEBS with low styrene content, and can improve the scratch resistance of the material without adding plasticizer white oil, and simultaneously ensure the processability and flowability of the material.
2. According to the invention, the thermoplastic elastomer of the transparent flame-retardant rubber-coated PC material has light transmittance of more than 70% by matching the raw materials such as the styrene thermoplastic elastomer, the acrylic block copolymer, the compatilizer and the like.
3. The acrylic block copolymer with carbonyl group is adopted, so that the acrylic block copolymer has stronger adhesiveness to PC materials; and the refractive index of the material is similar to that of SEBS, so that the prepared material has higher light transmittance.
4. Under the action of the compatilizer selected by the invention, the compatibility of the styrene thermoplastic elastomer and the acrylic block copolymer is increased, and the transparency and the polarity are also increased; and the acrylic block copolymer, the slipping agent and the flame retardant have good compatibility and uniform dispersion, and can realize more excellent flame retardant property of the material.
5. The thermoplastic elastomer of the transparent flame-retardant rubber-coated PC material prepared by the invention has the advantages of excellent rubber coating and bonding effect, high peel strength, scratch resistance, high light transmittance, flame-retardant grade and small chromatic aberration when being used for rubber coating the PC material.
Detailed Description
The following are specific examples of the present invention, and the technical solutions of the present invention are further described, but the present invention is not limited to these examples. The following raw materials used in the present invention are all commonly used in the art unless otherwise specified.
PC (polycarbonate) is first injection molded into a standard spline skeleton, and then the thermoplastic elastomer of the transparent flame retardant encapsulated PC material prepared as described below is adhered to the PC skeleton by injection molding at 190-210 ℃. Finally, the finished products respectively pass the following performance tests, and the performance data are shown in Table 1; specific test criteria are as follows:
tensile strength test standard: GB/T528;
hardness test standard: GB/T2411;
flame retardant performance test standard: UL94;
peel strength test standard: GB/T7760;
transmittance (%, 3 mm) test standard: GB/T2410-2008;
scratch resistance test standard: according to the GM W14688 cross scraping method, 1% of black master batch is added into the thermoplastic elastomer of the prepared transparent flame-retardant rubber-coated PC material to be molded into a standard sample plate, the scraping force is 5N, and a color measuring instrument is adopted to test the color change delta L value of scratches before and after scraping, so that the scratch resistance performance is evaluated.
The raw materials specifically comprise the following components:
styrenic thermoplastic elastomer: koteng, kraton TM SEBSMD1648 (styrene content 20%); table oak, TAIPOL6014 (styrene content 18%); mass science and technology, S6540 (styrene content 20%); table rubber, SEBS6154 (styrene content 29%)
And (3) a compatilizer: escor TM 5100
Acrylic block copolymer: colali, LA series
Flame retardant: BDP (liquid)
Slip agent: PEG-400
White oil 50#: zhengxin Petroleum, no. 50 cosmetic grade white oil
Example 1
The thermoplastic elastomer of the transparent flame-retardant encapsulated PC material is prepared by weighing the following raw materials in parts by weight: SEBSMD1648:56 parts, LA2250:21 parts, BDP (liquid): 22 parts of compatilizer: 3 parts of PEG-400:0.8 parts, UV292:0.3 parts. Adding the raw materials into a mixer for pre-stirring at the speed of 700r/min for 3min; then adding the mixture into a feeding system of a double-screw extruder, uniformly adding a flame retardant through a melt pump, carrying out melt extrusion granulation, wherein the rotation speed of a main machine is 360r/min, and the processing temperature of each region is 180-220 ℃, thus obtaining the thermoplastic elastomer material.
Example 2
Compared with example 1, the difference is that the raw materials include: SEBSMD1648:57 parts, LA4285:10 parts of LA2140:10 parts, BDP (liquid): 22 parts, escor TM 5100:3 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 3
Compared with example 1, the difference is that the raw materials include: SEBSMD1648:56 parts, LA2140:21 parts, BDP (liquid): 22 parts, escor TM 5100:4 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 4
Compared with example 1, the difference is that the raw materials include: SEBSMD1648:58 parts, LA4285:28 parts, BDP (liquid): 22 parts, escor TM 5100:5 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 5
Compared with example 1, the difference is that the raw materials include: TAIPOL6014:50 parts of LA4285:21 parts, BDP (liquid): 22 parts, escor TM 5100:3 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 6
Compared with example 1, the difference is that the raw materials include: s6540:60 parts of LA4285:20 parts, BDP (liquid): 22 parts, escor TM 5100:5 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 7
Compared with example 1, the difference is that the raw materials include: SEBSMD1648:56 parts, LA2250:40 parts, BDP (liquid): 22 parts, escor TM 5100:3 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 8
Compared with example 1, the difference is that the raw materials include: SEBSMD1648:56 parts, LA2250:15 parts, BDP (liquid): 22 parts, escor TM 5100:3 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Example 9
The difference compared to example 1 is that the compatibilizer in the raw materials is SEBS-g-MAH (Taiwan rubber, SEBS 7126).
Example 10
The difference compared to example 1 is that the slip agent in the raw material is silicone oil.
Comparative example 1
Compared with example 1, the difference is that the raw materials include: SEBS6154:28 parts of white oil 50#:28 parts, LA2250:21 parts, BDP (liquid): 22 parts, escor TM 5100:3 parts of PEG-400:0.8 parts, UV292:0.3 parts.
Comparative example 2
The difference compared to example 1 is that the acrylic block copolymer in the raw material was replaced with the polar resin EMA1820.
Comparative example 3
The difference compared to example 1 is that the amount of flame retardant added to the raw material is 10 parts.
Comparative example 4
The difference compared with example 1 is that the flame retardant in the raw material is solid powdery TPP; the light transmittance was 28.6%.
Comparative example 5
The difference compared to example 1 is that the anti-UV auxiliary in the raw material is solid (UV 531); the light transmittance was 50.8%.
TABLE 1 Performance data sheet of finished products after thermoplastic elastomer encapsulation PC Material of transparent flame retardant encapsulation PC Material
As can be seen from the data in Table 1, the materials prepared in examples 1-6 all have good mechanical properties and flame retardant properties, the light transmittance is more than 70%, and the peel strength is more than or equal to 4.0KN/m. Wherein, in the embodiment 2, when two of LA series are adopted as acrylic block copolymers, the peel strength is superior to the performance of the embodiment 1, 3 and 4 when one of LA series is adopted, the adhesion of materials is ensured, and the scratch resistance of the materials is superior; and the thermoplastic elastomer of the transparent flame-retardant rubber-coated PC material can be changed within the hardness range of 40-85A by adjusting the types and the contents of SEBS and LA within the range of the invention, so as to meet the requirements of different hardness. While too much acrylic block copolymer added in example 7 results in a decrease in flame retardant content, a slight decrease in flame retardant properties, and a longer setting time; too little acrylic block copolymer added in example 8 resulted in poor adhesion. In example 8, SEBS-g-MAH was used as a compatibilizer, and the compatibility of SEBS-g-MAH with other components was poor, resulting in deterioration of flame retardancy, peel strength and light transmittance of the material. In example 9, silicone oil was used as a slipping agent, and the polarity was reduced, which resulted in uneven dispersion, streaking in the material, and performance degradation.
In comparative example 1, by charging SEBS6154 with 1-fold white oil instead of MD1648, the peel strength and light transmittance are improved, but the scratch resistance color difference is large, because the scratch resistance of the material is deteriorated due to the addition of white oil. In comparative example 2, the conventional polar resin EMA was used, but although EMA was excellent in compatibility with SEBS and high in hardness itself, the adhesion ability was inferior to LA series and poor in compatibility with BDP, and thus the adhesion, flame retardancy and light transmittance of the material were greatly reduced. The flame retardant was added in too small an amount in comparative example 3, resulting in poor flame retardant properties. In comparative examples 4 and 5, the addition of the solid flame retardant and the UV-resistant auxiliary agent greatly affects the light transmittance.
In conclusion, the thermoplastic elastomer of the transparent flame-retardant encapsulated PC material prepared by the invention has good mechanical property, flame retardant property, light transmittance and chromatic aberration, and has larger peel strength when the PC material is encapsulated.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (8)
1. The thermoplastic elastomer of the transparent flame-retardant encapsulated PC material is characterized by comprising the following raw materials in parts by weight:
styrenic thermoplastic elastomer: 50-60 parts of a lubricant, wherein the lubricant comprises,
acrylic block copolymer: 20-30 parts of a base material, wherein,
flame retardant: 20-25 parts of a compound containing,
and (3) a compatilizer: 3-5 parts of a base material, wherein the base material comprises,
slip agent: 0.1-1 part of the total weight of the components,
UV resistant auxiliary: 0.1-0.5 part;
the styrene thermoplastic elastomer is styrene-ethylene-butylene-styrene copolymer, wherein the styrene accounts for 18-22 percent;
the acrylic block copolymer is an acrylic block copolymer with carbonyl groups, the hard segment is PMMA, and the soft segment is PnBA;
the acrylic block copolymer is colali LA series;
the flame retardant and the UV resistant auxiliary agent are transparent liquid;
when the thermoplastic elastomer of the transparent flame-retardant rubber-coated PC material is applied to the rubber-coated PC material, the peel strength of a finished product is more than or equal to 4.0KN/m; the light transmittance is more than 70%; the chromatic aberration delta L is less than 1; the flame retardant rating reaches V0.
2. The thermoplastic elastomer of a transparent flame retardant encapsulated PC material of claim 1, wherein the flame retardant comprises a high efficiency polyphosphate flame retardant.
3. The thermoplastic elastomer of a transparent flame retardant encapsulated PC material according to claim 1, wherein the compatibilizer is an ethylene acrylic acid copolymer having an acrylic acid content of 10-15%.
4. The thermoplastic elastomer of a transparent flame retardant encapsulated PC material according to claim 1, wherein the UV resistant auxiliary comprises a light stabilizer.
5. The thermoplastic elastomer of a transparent flame retardant encapsulated PC material according to claim 1, wherein the slip agent is polyethylene glycol having a molecular weight of 360-440.
6. The thermoplastic elastomer of a transparent flame retardant encapsulated PC material according to claim 1, wherein the acrylic block copolymer is a copolymer having a mass ratio of 1: (0.8-1.2) LA4285, LA 2140.
7. A method of preparing a thermoplastic elastomer for a transparent flame retardant encapsulated PC material according to claim 1, said method comprising: weighing the raw materials according to the parts by weight, adding other raw materials except the flame retardant into a mixer for premixing, then adding into a feeding system of a double-screw extruder, uniformly adding the flame retardant through a melt pump, and carrying out melt extrusion granulation to obtain the thermoplastic elastomer material, wherein the rotating speed of a host machine is 300-400r/min, and the processing temperature of each region is 180-220 ℃.
8. The method according to claim 7, wherein the speed of the pre-stirring process is 400-800r/min for 3-4min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108165026A (en) * | 2017-12-28 | 2018-06-15 | 聚威工程塑料(上海)有限公司 | Encapsulated composite thermoplastic elastic material is bonded for PC/PBT alloys |
| CN111253717A (en) * | 2020-02-12 | 2020-06-09 | 盛嘉伦橡塑(深圳）股份有限公司 | Thermoplastic elastomer and preparation method thereof |
| CN112175556A (en) * | 2020-10-26 | 2021-01-05 | 广州鹿山新材料股份有限公司 | Adhesive resin, method for producing the same, and protective film |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108165026A (en) * | 2017-12-28 | 2018-06-15 | 聚威工程塑料(上海)有限公司 | Encapsulated composite thermoplastic elastic material is bonded for PC/PBT alloys |
| CN111253717A (en) * | 2020-02-12 | 2020-06-09 | 盛嘉伦橡塑(深圳）股份有限公司 | Thermoplastic elastomer and preparation method thereof |
| CN112175556A (en) * | 2020-10-26 | 2021-01-05 | 广州鹿山新材料股份有限公司 | Adhesive resin, method for producing the same, and protective film |
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