CN114621551A - Transparent flame-retardant thermoplastic elastomer for encapsulating PC material and preparation method thereof - Google Patents
Transparent flame-retardant thermoplastic elastomer for encapsulating PC material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 87
- 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 65
- 239000003063 flame retardant Substances 0.000 title claims abstract description 65
- 229920002725 thermoplastic elastomer Polymers 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 36
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229920001400 block copolymer Polymers 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 229920001971 elastomer Polymers 0.000 claims abstract description 12
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 10
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 239000005060 rubber Substances 0.000 claims abstract description 8
- 229920001577 copolymer Polymers 0.000 claims abstract description 4
- 239000004417 polycarbonate Substances 0.000 claims description 62
- 238000000034 method Methods 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 4
- 239000004611 light stabiliser Substances 0.000 claims description 4
- 229920001223 polyethylene glycol Polymers 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 229920006465 Styrenic thermoplastic elastomer Polymers 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
- 238000002156 mixing Methods 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 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
- 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
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 230000000996 additive effect Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- 239000012748 slip agent Substances 0.000 claims 1
- 239000002861 polymer material Substances 0.000 abstract description 2
- 229920000515 polycarbonate Polymers 0.000 description 53
- 238000002834 transmittance Methods 0.000 description 20
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 238000012360 testing method Methods 0.000 description 6
- 238000005538 encapsulation Methods 0.000 description 5
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 239000000806 elastomer Substances 0.000 description 4
- 238000007790 scraping Methods 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 3
- 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
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920006272 aromatic hydrocarbon resin Polymers 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
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- 238000012986 modification 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
- 230000003678 scratch resistant effect Effects 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 235000017399 Caesalpinia tinctoria Nutrition 0.000 description 1
- 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
- 241000388430 Tara Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002537 cosmetic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000007719 peel strength test Methods 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
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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- 230000035882 stress Effects 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
- 229920003169 water-soluble polymer Polymers 0.000 description 1
Classifications
-
- 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 & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- 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 transparent flame-retardant thermoplastic elastomer for encapsulating a PC material, which comprises the following raw materials in parts by mass: styrene-based thermoplastic elastomer: 50-60 parts of acrylic block copolymer: 20-30 parts of a flame retardant: 20-25 parts of a compatilizer: 3-5 parts of a slipping agent: 0.1-1 part of anti-UV auxiliary agent: 0.1-0.5 part; the styrene thermoplastic elastomer is styrene-ethylene-butylene-styrene copolymer, wherein the styrene accounts for 18-22% of the total weight; the flame retardant and the anti-UV auxiliary agent are liquid. The invention also discloses a preparation method of the transparent flame-retardant thermoplastic elastomer for encapsulating the PC material.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and relates to a transparent flame-retardant thermoplastic elastomer for encapsulating a PC material and a preparation method thereof.
Background
Polycarbonate (PC) material is a general engineering plastic, has excellent mechanical, electrical and heat-resistant properties, especially high light transmittance, and is the fastest growing general engineering plastic among five engineering plastics. PC materials are widely used in the fields of household appliances, office appliances, medical instruments, automobile parts and the like. However, PC materials have poor low-temperature toughness and are prone to stress cracking, and the application range of the PC materials is limited. And the PC encapsulated by the thermoplastic elastomer material has strong falling resistance and shock resistance, provides comfortable and soft touch feeling for the product, can prevent skidding and is durable.
The elastomer encapsulating the PC material is different from the common elastomer in that the elastomer encapsulating the PC material can be directly bonded with PC, and the better compatibility of the two materials is, the more close the polarity is, the easier the bonding is. At present, most of the rubber-coated PC materials are made of polyurethane elastomers, but the TPU processing window is narrow, the forming time is long, and the forming difficulty of pure TPU rubber-coated PC is higher. For example, Chinese patent application (publication No. CN106832184A) discloses that silicone polyurethane elastomer can be used for encapsulating PC and other materials, but the process is complicated and the thermal stability is poor. In Chinese patent application document (publication No. CN109851977A), the PC material is encapsulated in the form of SEBS + white oil + compatilizer + TPU + auxiliary agent + filler, and from the perspective of a polymerization end or a modification end, although the problems of processing, encapsulation and the like of the TPU material are improved, the transparency of the encapsulating material cannot be realized. Therefore, TPEs with both plastic and rubber properties are beginning to be investigated as encapsulating materials. For example, Chinese patent application (publication No. CN110628165A) discloses a translucent thermoplastic elastomer for encapsulating PC and ABS, the main components are styrene elastomer + white oil + aromatic hydrocarbon resin, but white oil and aromatic hydrocarbon resin respectively cause the scratch resistance and aging resistance of the material to be reduced, and the light transmittance is only 60%.
At present, the market has few kinds of transparent PC materials encapsulated by thermoplastic elastomer, and has certain flame retardant property. Therefore, a thermoplastic elastomer of a transparent flame-retardant encapsulating PC material is urgently needed to provide more choices for the encapsulating industry, so that the original design structure of the internal PC material can be embodied, flame retardance can be realized, and the safety is improved.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a transparent flame-retardant thermoplastic elastomer for encapsulating PC materials, which has good light transmittance and mechanical properties, and has good peel strength after encapsulating PC materials.
The purpose of the invention can be realized by the following technical scheme:
the transparent flame-retardant thermoplastic elastomer for encapsulating the PC material comprises the following raw materials in parts by mass:
styrenic thermoplastic elastomer: 50-60 parts of (by weight),
acrylic block copolymer: 20-30 parts of (by weight),
flame retardant: 20-25 parts of (by weight),
a compatilizer: 3-5 parts of (A) a water-soluble polymer,
a slipping agent: 0.1-1 part of (A) to obtain,
anti-UV auxiliary agent: 0.1-0.5 part;
the styrene thermoplastic elastomer is styrene-ethylene-butylene-styrene copolymer (SEBS), wherein the proportion of styrene is 18-22%;
the flame retardant and the anti-UV auxiliary agent are liquid.
In the preparation process of the traditional thermoplastic elastomer, white oil or filling oil is mostly required to be added as a plasticizer or a processing aid, and the conventional SEBS has high styrene content and has processability only by filling the white oil; the invention directly adopts the SEBS with low styrene content and 18-22 percent of styrene, and omits the white oil, thereby not only ensuring the processability and the fluidity of the material, but also avoiding the addition of a plasticizer, and improving the scratch resistance of the material; and the acrylic block copolymer with the refractive index close to that of SEBS is used as the auxiliary material, so that the transparency of the finished product material is higher. And the acrylic block copolymer has carbonyl groups, shows stronger adhesion to PC materials and can better encapsulate the PC materials. The thermoplastic elastomer of the transparent flame-retardant encapsulated PC material prepared by the invention has light transmittance of more than 70 percent, which is because the light transmittance of the selected acrylic block copolymer is higher; and the flame retardant and the anti-UV auxiliary agent are transparent liquid, and the transparency is influenced by the common solid flame retardant and the common anti-UV auxiliary agent.
Preferably, the acrylic block copolymer is an acrylic block copolymer (polymethyl methacrylate block copolymer).
Further preferably, the light transmittance of the acrylic block copolymer is (3mm) > 91%.
Further 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 comprises one or more of LA4285 (shore hardness 95A), LA2250 (shore hardness 65A), and LA2140 (shore hardness 32A).
Compared with the conventional polar resin, 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 adhesive capacity with PC material is increased.
Further preferably, the acrylic block copolymer is a copolymer of 1: (0.8-1.2) LA4285 and LA 2140.
The acrylic block copolymer can be combined by a plurality of LA series raw materials, the hardness range is adjusted to be 40-85A, and the peel strength and the light transmittance can be effectively enhanced by adding the composition.
Preferably, the flame retardant comprises a polyphosphate ester high-efficiency flame retardant.
More preferably, the viscosity of the flame retardant is 15000-19000(25 ℃, mPa.s), and the phosphorus content is 8-10%.
Preferably, the compatilizer is an ethylene acrylic acid copolymer, and the acrylic acid content is 10-15%.
Preferably, the anti-UV auxiliary comprises a light stabilizer.
Further preferably, the light stabilizer comprises one or more of UV292, HS-C102, Tinuvin B75.
The liquid light stabilizer is selected, so that the influence on the transparency is reduced while the stability is ensured.
Preferably, the slipping agent is polyethylene glycol with the molecular weight of 360-440.
Further preferably, the slipping agent is PEG-400.
The addition of the slipping agent polyethylene glycol ensures the slipping property of the material on one hand, and improves the polarity of the material on the other hand, so that the polyethylene glycol is better combined with a polar material LA series.
The invention also discloses a preparation method of the transparent flame-retardant thermoplastic elastomer for encapsulating the PC material, which comprises the following steps: weighing the raw materials according to the mass parts, 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 main machine is 300-400r/min, and the processing temperature of each area is 180-220 ℃.
Preferably, the speed of the pre-mixing process is 400-800r/min, and the time is 3-4 min.
The invention also discloses an application of the transparent flame-retardant PC encapsulating material thermoplastic elastomer in encapsulating PC materials, which comprises the step of bonding the transparent flame-retardant PC encapsulating material thermoplastic elastomer on a PC framework through injection molding at the temperature of 190-210 ℃. The acrylic block copolymer with carbonyl groups is selected from the raw materials of the thermoplastic elastomer for preparing the transparent flame-retardant encapsulating PC material, and has stronger adhesion to the PC material, so that the transparent flame-retardant encapsulating PC material has better binding force. The thermoplastic elastomer encapsulated PC material of the transparent flame-retardant encapsulated PC material prepared by the invention not only can embody the original design structure of the PC material in the interior, but also can realize flame retardance and improve the safety.
When the thermoplastic elastomer of the transparent flame-retardant encapsulation PC material is applied to the encapsulation PC material, the peel strength of a finished product is more than or equal to 4.0KN/m, and the encapsulation bonding effect is excellent; the light transmittance is more than 70 percent; the color difference 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 the fluidity of the material.
2. According to the invention, through the matching of the styrene thermoplastic elastomer, the acrylic block copolymer, the compatilizer and other raw materials, the thermoplastic elastomer of the prepared transparent flame-retardant encapsulating PC material has the light transmittance of more than 70%.
3. The acrylic block copolymer with carbonyl groups is adopted, so that the adhesive property to a PC material is high; and the prepared material has higher light transmittance due to the similar refractive index with SEBS.
4. Under the action of the selected compatilizer, 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 the more excellent flame retardant property of the material can be realized.
5. The thermoplastic elastomer of the transparent flame-retardant encapsulated PC material prepared by the invention has the advantages of excellent encapsulating and bonding effects, high peel strength, scratch resistance, high light transmittance and flame-retardant level and small color difference when encapsulating the PC material.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples. The following materials used in the present invention are all materials commonly used in the art, unless otherwise specified.
PC (polycarbonate) is firstly injected into a standard sample bar framework, and then the thermoplastic elastomer of the transparent flame-retardant encapsulating PC material prepared by the method is adhered to the PC framework by injection at the temperature of 190-210 ℃. Finally, the finished products respectively pass the following performance tests, and the performance data are shown in table 1; the specific test criteria are as follows:
tensile strength test standard: GB/T528;
hardness test standard: GB/T2411;
flame retardant performance test standard: UL 94;
peel strength test standard: GB/T7760;
light transmittance (%, 3mm) test standard: GB/T2410-2008;
scratch resistance test standard: the method is carried out according to a GM W14688 cross scraping method, 1 percent of black master batch is added into the thermoplastic elastomer of the prepared transparent flame-retardant rubber-coated PC material to be injected into a standard sample plate, the scraping force is 5N, and a colorimeter is adopted to test the color change delta L value of the scratch before and after the scraping, so as to evaluate the scraping resistance.
The raw materials specifically comprise the following components:
styrenic thermoplastic elastomer: kraton, KratonTMSEBSMD1648 (styrene content 20%); tara, TAIPOL6014 (styrene content 18%); zhongli science, S6540 (styrene content 20%); taiwan oak, SEBS6154 (styrene content 29%)
A compatilizer: escorTM 5100
Acrylic block copolymer: cola, LA series
Flame retardant: BDP (liquid)
A slipping agent: PEG-400
White oil 50 #: xinxin oil, No. 50 cosmetic grade white oil
Example 1
The transparent flame-retardant rubber-coated PC material comprises the following raw materials in parts by mass: SEBS SMD 1648: 56 parts, LA 2250: 21 parts, BDP (liquid): 22 parts of a compatilizer: 3 parts, PEG-400: 0.8 part, UV 292: 0.3 part. Adding the raw materials into a mixer for pre-mixing at the speed of 700r/min for 3 min; and then adding the mixture into a feeding system of a double-screw extruder, uniformly adding a flame retardant through a melt pump, and carrying out melt extrusion granulation, wherein the rotating speed of a main machine is 360r/min, and the processing temperature of each area is 180-220 ℃, so as to obtain the thermoplastic elastomer material.
Example 2
Compared with the example 1, the difference is that the raw materials comprise: SEBS SMD 1648: 57 parts, LA 4285: 10 parts, LA 2140: 10 parts, BDP (liquid): 22 parts of EscorTM5100: 3 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 3
Compared with the example 1, the difference is that the raw materials comprise: SEBS SMD 1648: 56 parts, LA 2140: 21 parts, BDP (liquid): 22 parts of EscorTM5100: 4 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 4
Compared with the example 1, the difference is that the raw materials comprise: SEBS SMD 1648: 58 parts, LA 4285: 28 parts, BDP (liquid): 22 parts of EscorTM5100: 5 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 5
Compared with the example 1, the difference is that the raw materials comprise: TAIPOL 6014: 50 parts, LA 4285: 21 parts, BDP (liquid): 22 parts of EscorTM5100: 3 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 6
Compared with the example 1, the difference is that the raw materials comprise: s6540: 60 parts, LA 4285: 20 parts, BDP (liquid): 22 parts of EscorTM5100: 5 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 7
Compared with the example 1, the difference is that the raw materials comprise: SEBS SMD 1648: 56 parts, LA 2250: 40 parts, BDP (liquid): 22 parts of EscorTM5100: 3 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 8
Compared with the example 1, the difference is that the raw materials comprise: SEBS SMD 1648: 56 parts, LA 2250: 15 parts, BDP (liquid): 22 parts of EscorTM5100: 3 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Example 9
The difference from example 1 is that the compatibilizer in the raw material was SEBS-g-MAH (Taber rubber, SEBS 7126).
Example 10
Compared with the embodiment 1, the difference is that the slipping agent in the raw material is silicone oil.
Comparative example 1
Compared with the example 1, the difference is that the raw materials comprise: SEBS 6154: 28 parts, white oil 50 #: 28 parts, LA 2250: 21 parts, BDP (liquid): 22 parts of EscorTM5100: 3 parts, PEG-400: 0.8 part, UV 292: 0.3 part.
Comparative example 2
The difference compared to example 1 is that the acrylic block copolymer in the starting material was replaced with polar resin EMA 1820.
Comparative example 3
The difference from example 1 is that the amount of the flame retardant added in the raw materials is 10 parts.
Comparative example 4
Compared with the example 1, the difference is that the flame retardant in the raw materials is solid powder TPP; the light transmittance was 28.6%.
Comparative example 5
Compared with example 1, the difference is that the anti-UV auxiliary agent in the raw material is solid (UV 531); the light transmittance was 50.8%.
TABLE 1 Performance data Table of PC material-encapsulated thermoplastic elastomer of transparent flame-retardant 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 greater than 70%, and the peel strength is greater than or equal to 4.0 KN/m. Wherein, the peel strength of the acrylic block copolymer of two LA series adopted in the example 2 is better than the performance of one LA series adopted in the examples 1, 3 and 4, thereby not only ensuring the adhesion of the material, but also ensuring the excellent scratch resistance of the material; and the thermoplastic elastomer of the transparent flame-retardant encapsulation PC material can be changed within the hardness range of 40-85A by adjusting the types and the contents of SEBS and LA in the range of the invention, so that different hardness requirements are met. The acrylic block copolymer added in the embodiment 7 is too much, so that the content of the flame retardant is reduced, the flame retardant performance is slightly reduced, and the setting time is prolonged; too little acrylic block copolymer added in example 8 resulted in poor adhesion. In example 8, SEBS-g-MAH was used as a compatibilizer, which resulted in poor compatibility with other components and poor flame retardancy, peel strength, and light transmittance. In example 9, when silicone oil was used as a slipping agent, the polarity was lowered, resulting in uneven dispersion, streaks formed inside the material, and the performance was lowered.
In comparative example 1, 1-fold white oil is filled into SEBS6154 to replace MD1648, so that although the peel strength and the light transmittance are improved, the scratch-resistant color difference is large, and the scratch-resistant performance of the material is poor due to the addition of the white oil. In comparative example 2, conventional polar resin EMA is used, and although EMA has good compatibility with SEBS and high hardness, the adhesion capability is inferior to that of LA series, and compatibility with BDP is poor, so that the adhesion, flame retardancy and light transmittance of the material are greatly reduced. In comparative example 3, the amount of the flame retardant added was too small, resulting in poor flame retardancy. In comparative examples 4 and 5, the solid flame retardant and the UV resistant auxiliary were added, and therefore, the influence on the transmittance was large.
In conclusion, the thermoplastic elastomer of the transparent flame-retardant encapsulating PC material prepared by the invention has good mechanical property, flame-retardant property, light transmittance and chromatic aberration, and has larger peel strength when encapsulating PC materials.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The transparent flame-retardant rubber-coated PC material thermoplastic elastomer is characterized by comprising the following raw materials in parts by mass:
styrenic thermoplastic elastomer: 50-60 parts of (by weight),
acrylic block copolymer: 20-30 parts of (by weight),
flame retardant: 20-25 parts of (by weight),
a compatilizer: 3-5 parts of (by weight),
a slipping agent: 0.1-1 part of (A) to obtain,
anti-UV auxiliary agent: 0.1-0.5 part;
the styrene thermoplastic elastomer is styrene-ethylene-butylene-styrene copolymer, wherein the styrene accounts for 18-22% of the total weight;
the flame retardant and the anti-UV auxiliary agent are liquid.
2. The transparent flame retardant encapsulated PC material thermoplastic elastomer of claim 1 wherein the acrylic block copolymer is an acrylic block copolymer.
3. The transparent flame retardant encapsulating thermoplastic elastomer of PC material according to claim 2, wherein the hard block of the acrylic block copolymer is PMMA and the soft block is PnBA.
4. The transparent flame retardant encapsulating thermoplastic elastomer of PC material according to claim 2 or 3, wherein the acrylic block copolymer is a polar material LA series.
5. The transparent flame retardant encapsulated PC material thermoplastic elastomer of claim 1 wherein the flame retardant comprises a high efficiency polyphosphate flame retardant.
6. The transparent flame retardant encapsulated PC material thermoplastic elastomer of claim 1 wherein said compatibilizer is an ethylene acrylic acid copolymer having an acrylic acid content of 10-15%.
7. The thermoplastic elastomer of the transparent flame retardant encapsulated PC material of claim 1 wherein the UV resistant additive comprises a light stabilizer.
8. The transparent flame retardant encapsulated PC material thermoplastic elastomer as claimed in claim 1, wherein the slip agent is polyethylene glycol with a molecular weight of 360-440.
9. A process for preparing a thermoplastic elastomer of the transparent flame retardant encapsulated PC material of claim 1, wherein the process comprises: weighing the raw materials according to the mass parts, 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 main machine is 300-400r/min, and the processing temperature of each area is 180-220 ℃.
10. The preparation method as claimed in claim 9, wherein the speed of the pre-mixing process is 400-800r/min and the time is 3-4 min.
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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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