CN115490979A - Spraying-free high-toughness high-heat-resistance high-laser-transmittance ASA/PMMA for laser welding and preparation method thereof - Google Patents
Spraying-free high-toughness high-heat-resistance high-laser-transmittance ASA/PMMA for laser welding and preparation method thereof Download PDFInfo
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- 229920003229 poly(methyl methacrylate) Polymers 0.000 title claims abstract description 81
- 239000004926 polymethyl methacrylate Substances 0.000 title claims abstract description 81
- 238000002834 transmittance Methods 0.000 title claims abstract description 34
- 238000003466 welding Methods 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 229920002877 acrylic styrene acrylonitrile Polymers 0.000 claims abstract description 92
- 239000011347 resin Substances 0.000 claims abstract description 35
- 229920005989 resin Polymers 0.000 claims abstract description 35
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 20
- 239000000956 alloy Substances 0.000 claims abstract description 19
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 239000004611 light stabiliser Substances 0.000 claims abstract description 19
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 17
- YAAQEISEHDUIFO-UHFFFAOYSA-N C=CC#N.OC(=O)C=CC=CC1=CC=CC=C1 Chemical compound C=CC#N.OC(=O)C=CC=CC1=CC=CC=C1 YAAQEISEHDUIFO-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 20
- 238000001125 extrusion Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 13
- -1 acrylic ester Chemical class 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000006229 carbon black Substances 0.000 claims description 5
- 238000013329 compounding Methods 0.000 claims description 5
- 229940123457 Free radical scavenger Drugs 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 150000008301 phosphite esters Chemical class 0.000 claims description 3
- 239000002516 radical scavenger Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- 150000002989 phenols Chemical class 0.000 claims 1
- 239000003086 colorant Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 abstract 1
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 238000007592 spray painting technique Methods 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 20
- 238000001816 cooling Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- HIDBROSJWZYGSZ-UHFFFAOYSA-N 1-phenylpyrrole-2,5-dione Chemical compound O=C1C=CC(=O)N1C1=CC=CC=C1 HIDBROSJWZYGSZ-UHFFFAOYSA-N 0.000 description 1
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000011361 granulated particle Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011342 resin composition Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 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
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/10—Homopolymers or copolymers of methacrylic acid esters
- C08L33/12—Homopolymers or copolymers of methyl methacrylate
-
- 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
- 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
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
The invention discloses a spraying-free, high-toughness, high-heat-resistance and high-laser-transmittance ASA/PMMA resin for laser welding and a preparation method thereof, wherein the ASA/PMMA resin comprises the following components in percentage by weight: 50-80 parts of polymethyl methacrylate (PMMA) resin, 20-40 parts of acrylonitrile-styrene-acrylate (ASA) resin, 5-20 parts of heat-resistant agent, 0-1 part of antioxidant, 0-1 part of light stabilizer and 0-2 parts of toner. The ASA/PMMA alloy resin prepared by the invention solves the problem of mutual restriction in basic performances of toughness, heat resistance and blackness, has high laser transmittance, can directly replace a product mixed with colors by spray painting, and is particularly suitable for laser welding of columns, grids and peripheral ornaments thereof, and parts such as glasses, car lamps and the like with high air tightness requirements.
Description
Technical Field
The invention relates to the field of thermoplastic composite materials, in particular to a preparation method of ASA/PMMA for laser welding with spraying-free, high toughness, high heat resistance and high laser transmittance
Background
PMMA has high transparency, high hardness, high weather resistance and particularly good dyeing propertyThe color property is that the molecular structure determines that PMMA is fragile and is mainly characterized by poor falling ball impact, especially low-temperature impact property; ASA resin has good impact resistance, but has poor hardness and coloring performance, is not easy to be made into high-brightness effect, and limits the application range of the resin; with the development of industries such as modern automobiles, medical treatment, household appliances and the like, consumers pursue more beautiful effects and the like, the dangers brought to the environment by the industries such as paint spraying, electroplating and the like are more and more prominent, and the development of materials capable of replacing the paint spraying and electroplating effects is urgent; the solubility parameter of ASA is 9.6-9.8 (J/cm) 3 ) 1/2 The solubility parameter of PMMA is 9.0-9.5 (J/cm) 3 ) 1/2 According to the principle that solubility parameters are similar, ASA and PMMA have partial compatibility, so that the ASA and PMMA can be made into alloy theoretically; although ASA and PMMA can be made into alloy theoretically, the toughness, blackness and heat resistance are difficult to meet the requirements of customers, especially the experimental requirements of the automobile industry at the same time.
Chinese patent CN 106832723A discloses a high-heat-resistance and high-weather-resistance ASA/PMMA composite material and a preparation method thereof, and by adding alpha-methylstyrene or N-phenylmaleimide as a heat-resistant agent, although the heat-resistant property of ASA/PMMA is greatly improved, the blackness of the ASA/PMMA is seriously influenced, and in addition, the laser transmittance of the ASA/PMMA is obviously influenced after carbon black is added.
Chinese patent CN 106046643A discloses a highly compatible PMMA/ASA alloy resin composition and a preparation method thereof, the compatibility of ASA and PMMA is increased by adding a compatilizer to improve the heat resistance, but the blackness and the laser transmittance of the ASA/PMMA alloy are not concerned.
Although the solutions improve one aspect of the performance of the ASA/PMMA alloy, the other two performances are often satisfied by sacrificing one of toughness, heat resistance and blackness, and the obtained ASA/PMMA has very low laser transmittance, which is substantially zero, and cannot satisfy the requirement of laser welding. According to the invention, the ratio of ASA and PMMA is adjusted, the toughness is adjusted and the material has high laser transmittance by a method of compounding the ASA rubber powder with the particle size, a new heat-resistant agent is introduced to increase the heat resistance, and the ASA/PMMA alloy material which has high toughness, high heat resistance, high blackness and high laser transmittance and can be used for laser welding is obtained by granulation after screw extrusion.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides ASA/PMMA for laser welding with no spraying, high toughness, high heat resistance and high laser transmittance and a preparation method thereof.
The purpose of the invention is realized by the following technical scheme.
The ASA/PMMA is prepared from the following raw materials in parts by weight:
50-80 parts of polymethyl methacrylate (PMMA) resin;
20-40 parts of acrylonitrile-styrene-acrylate (ASA) resin;
5-20 parts of a heat-resistant agent;
0-1 part of antioxidant;
0-1 part of light stabilizer;
0-2 parts of toner.
Wherein the melt index of the PMMA resin is between 2 and 8, and the polydispersity index is between 1 and 3.
The ASA resin is compounded by rubber powder with large and small particle sizes. The size range of the ASA resin large particle size is 300-500um, and the content of the acrylic ester is 50-70%. The size range of the ASA resin with large particle size is between 100 and 200um, and the content of acrylic ester is between 50 and 70 percent.
The heat-resistant agent is one or more of SAN-MMA-SMA, AS-MMA-SMA, SAN-SMA and AS-SMA copolymer.
Furthermore, the AS-MMA-SMA copolymer has a molecular weight range of 70000-120000 and a polydispersity coefficient of 2-3, wherein the MMA content is 30-35%.
The AS-SMA copolymer has a molecular weight range of 90000-160000 and a polydispersity of 1-3, wherein the SMA content is 15-18%.
The antioxidant is compounded by phosphite esters or hindered phenol antioxidants.
The light stabilizer is one or more of an ultraviolet absorbent and a free radical scavenger.
The toner is prepared by one or multiple compounding except carbon black.
The preparation method of the ASA/PMMA for the laser welding with no spraying, high toughness, high heat resistance and high laser transmittance comprises the following steps:
(1) Mixing 50-80 parts of PMMA, 5-20 parts of heat-resistant agent and 0-1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 20-40 parts of ASA, 0-1 part of a light stabilizer and 0-2 parts of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding to quantitatively convey the material B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 300-600 r/min, and the ASA/PMMA alloy resin which is free of spraying, high in toughness, high in heat resistance and high in laser transmittance and can be used for laser welding can be obtained through cooling and grain cutting under the condition that the rotating speed of a grain cutting machine is 800-1000 r/min.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the invention, the ratio of ASA and PMMA is adjusted by means of blending and extrusion, the toughness is adjusted and the material has high laser transmittance by a method of compounding ASA rubber powder with the particle size, and a new heat-resistant agent is introduced to increase the heat resistance, so that the ASA/PMMA alloy material which has high toughness, high heat resistance, high blackness and high laser transmittance and can be used for laser welding is obtained.
(2) The rubber powder, the toner and the light stabilizer are conveyed by a metering pump side feeding method, so that the performance loss caused by shearing is reduced while uniform mixing is ensured.
(3) The preparation method is simple in preparation process, low in cost and particularly suitable for industrial production.
Detailed Description
Specific examples of the practice of the invention are given below. The specific examples are intended to be illustrative of the invention and are not intended to limit the scope of the claims.
The invention provides a preparation method of ASA/PMMA for laser welding, which is free of spraying, high in toughness, high in heat resistance and high in laser transmittance, and comprises the following components:
50-80 parts of polymethyl methacrylate (PMMA) resin; the melt index of PMMA resin is between 2 and 8, and the polydispersity index is between 1 and 3.
20-40 parts of acrylonitrile-styrene-acrylate (ASA) resin; the ASA resin is compounded by rubber powder with large and small particle sizes, the size range of the large particle size is 300-500um, and the content of acrylic ester is 50-70%. The size range of the ASA resin large particle size is between 100 and 200 mu m, and the content of the acrylic ester is between 50 and 70 percent.
5-20 parts of a heat-resistant agent; the heat-resistant agent is one or more of SAN-MMA-SMA, AS-MMA-SMA, SAN-SMA and AS-SMA copolymer, the molecular weight range of the SAN-MMA-SMA and the AS-MMA-SMA copolymer is 70000-120000, the polydispersity index is 2-3, and the MMA content is 30-35%; SAN-SMA, AS-SMA copolymer molecular weight range 90000-160000, polydispersion factor 1-3, wherein SMA content 15-18%.
0-1 part of antioxidant; the antioxidant is phosphite ester or hindered phenol antioxidant compound
0-1 part of a light stabilizer; the light stabilizer is one or more of ultraviolet absorbent and free radical scavenger
0-2 parts of toner; the toner is prepared by one or multiple compounding except carbon black.
The following examples contain the following production steps
(1) Mixing 50-80 parts of PMMA, 5-20 parts of heat-resistant agent and 0-1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 20-40 parts of ASA, 0-1 part of a light stabilizer and 0-2 parts of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding to quantitatively convey the material B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 300-600 r/min, and the ASA/PMMA alloy resin which is free of spraying, high in toughness, high in heat resistance and high in laser transmittance and can be used for laser welding can be obtained through cooling and grain cutting under the condition that the rotating speed of a grain cutting machine is 800-1000 r/min.
Example 1
The preparation method of the ASA/PMMA for laser welding, which is free of spraying, high in toughness, high in heat resistance and high in laser transmittance, comprises the following components in parts by weight:
(1) Mixing 60 parts of PMMA, 5 parts of heat-resistant agent SAN-MMA-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 10 parts of ASA with large particle size, 22 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding to quantitatively convey the material B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 500 r/min, and the ASA/PMMA alloy resin can be obtained through cooling and grain cutting under the condition that the rotating speed of a grain cutting machine is 800 r/min.
Example 2
The preparation method of the spray-free, high-toughness, high-heat-resistance, and high-laser-transmittance ASA/PMMA for laser welding described in this embodiment comprises the following components by weight:
(1) Mixing 60 parts of PMMA, 10 parts of heat-resistant agent SAN-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 15 parts of ASA with large particle size, 12 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding to quantitatively convey the material B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 350 revolutions per minute, and the ASA/PMMA alloy resin can be obtained through cooling and grain cutting under the condition that the rotating speed of a grain cutting machine is 800 revolutions per minute.
Example 3
The preparation method of the spray-free, high-toughness, high-heat-resistance, and high-laser-transmittance ASA/PMMA for laser welding described in this embodiment comprises the following components by weight:
(1) Mixing 50 parts of PMMA, 20 parts of heat-resistant agent SAN-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 15 parts of ASA with large particle size, 12 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding to quantitatively convey the material B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 400 revolutions per minute, and the ASA/PMMA alloy resin can be obtained through cooling and grain cutting under the condition that the rotating speed of a grain cutting machine is 800 revolutions per minute.
Example 4
The preparation method of the spray-free, high-toughness, high-heat-resistance, and high-laser-transmittance ASA/PMMA for laser welding described in this embodiment comprises the following components by weight:
(1) Mixing 70 parts of PMMA, 3 parts of heat-resistant agent AS-MMA-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 15 parts of ASA with large particle size, 10 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding and quantitative conveying B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 400 r/min, and the ASA/PMMA alloy resin can be obtained under the conditions of cooling and grain cutting, and the rotating speed of a grain cutting machine is 900 r/min.
Comparative example 1
The preparation method of the spray-free, high-toughness, high-heat-resistance, and high-laser-transmittance ASA/PMMA for laser welding described in this embodiment comprises the following components by weight:
(1) Mixing 60 parts of PMMA, 5 parts of heat-resistant agent SAN-MMA-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 32 parts of ASA with large particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding and quantitative conveying B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 500 r/min, and the ASA/PMMA alloy resin can be obtained under the conditions of cooling and grain cutting, and the rotating speed of a grain cutting machine is 800 r/min.
Comparative example 2
The preparation method of the spray-free, high-toughness, high-heat-resistance, and high-laser-transmittance ASA/PMMA for laser welding described in this embodiment comprises the following components by weight:
(1) Mixing 60 parts of PMMA, 5 parts of heat-resistant agent SAN-MMA-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 32 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding and quantitative conveying B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 500 r/min, and the ASA/PMMA alloy resin can be obtained under the conditions of cooling and grain cutting, and the rotating speed of a grain cutting machine is 800 r/min.
Comparative example 3
The preparation method of the ASA/PMMA for laser welding, which is free of spraying, high in toughness, high in heat resistance and high in laser transmittance, comprises the following components in parts by weight:
(1) Mixing 60 parts of PMMA, 5 parts of heat-resistant agent SAN-MMA-SMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 10 parts of ASA with large particle size, 22 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of carbon black in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding to quantitatively convey the material B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 500 r/min, and the ASA/PMMA alloy resin can be obtained through cooling and grain cutting under the condition that the rotating speed of a grain cutting machine is 800 r/min.
Comparative example 4
The preparation method of the spray-free, high-toughness, high-heat-resistance, and high-laser-transmittance ASA/PMMA for laser welding described in this embodiment comprises the following components by weight:
(1) Mixing 70 parts of PMMA and 1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 15 parts of ASA with large particle size, 12 parts of ASA with small particle size, 1 part of light stabilizer and 1 part of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to a double-screw extruder through a metering pump through side feeding and quantitative conveying B, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 350 r/min, and the ASA/PMMA alloy resin can be obtained under the conditions of cooling and grain cutting, and the rotating speed of a grain cutting machine is 800 r/min.
Drying the granulated particles, sampling and testing, and testing the notch impact property according to ISO 179-1 (kJ/m) 2 ) (ii) a Tensile strength properties according to ISO 527 (MPa); each example and comparative example were injection molded into 150 x 100 x 2mm highlight panels, and the panels were interleaved with black ABS available for laser welding and welded at 30W laser intensity and 30mm/s welding speed; the laser transmittance test uses a semiconductor laser (980 nm); vicat softening temperature according to ISO 306 (B50 ℃), blackness in an integrating-sphere spectrophotometer SCE mode.
Claims (10)
1. A spraying-free ASA/PMMA with high toughness, high heat resistance and high laser transmittance for laser welding is characterized in that: the feed is prepared from the following raw materials in parts by weight:
50-80 parts of polymethyl methacrylate (PMMA) resin;
20-40 parts of acrylonitrile-styrene-acrylate (ASA) resin;
5-20 parts of a heat-resistant agent;
0-1 part of antioxidant;
0-1 part of light stabilizer;
0-2 parts of toner.
2. The ASA/PMMA capable of being sprayed-free, high in toughness, high in heat resistance and high in laser transmittance for laser welding as claimed in claim 1, wherein: the melt index of the PMMA resin is between 2 and 8, and the polydispersity index is between 1 and 3.
3. The ASA/PMMA capable of being sprayed-free, high in toughness, high in heat resistance and high in laser transmittance for laser welding as claimed in claim 1, wherein: the ASA resin is compounded by rubber powder with large and small particle sizes; the size range of the ASA resin with large particle size is 300-500um, and the content of acrylic ester is 50-70%. The size range of the ASA resin with large particle size is between 100 and 200um, and the content of acrylic ester is between 50 and 70 percent.
4. The ASA/PMMA for laser welding of high toughness, high heat resistance and high laser transmissivity without spraying according to claim 1, wherein: the heat-resistant agent is one or more of SAN-MMA-SMA, AS-MMA-SMA, SAN-SMA and AS-SMA copolymer.
5. The ASA/PMMA capable of being sprayed-free, high in toughness, high in heat resistance and high in laser transmittance for laser welding according to claim 4, wherein the ASA/PMMA comprises the following components in percentage by weight: the AS-MMA-SMA copolymer has a molecular weight range of 70000-120000 and a polydispersity coefficient of 2-3, wherein the MMA content is 30-35%.
6. The ASA/PMMA for laser welding of high toughness, high heat resistance and high laser transmissivity without spraying according to claim 4, wherein: the AS-SMA copolymer has a molecular weight range of 90000-160000 and a polydispersity coefficient of 1-3, wherein the SMA content is 15-18%.
7. The ASA/PMMA capable of being sprayed-free, high in toughness, high in heat resistance and high in laser transmittance for laser welding as claimed in claim 1, wherein: the antioxidant is compounded by phosphite esters or hindered phenols.
8. The ASA/PMMA capable of being sprayed-free, high in toughness, high in heat resistance and high in laser transmittance for laser welding as claimed in claim 1, wherein: the light stabilizer is one or more of an ultraviolet absorbent and a free radical scavenger.
9. The ASA/PMMA for laser welding of high toughness, high heat resistance and high laser transmissivity without spraying according to claim 1, wherein: the toner is prepared by one or multiple compounding except carbon black.
10. The preparation method of the spray-free, high-toughness, high-heat-resistance and high-laser-transmittance ASA/PMMA for laser welding according to any one of claims 1-9, which is characterized by comprising the following steps:
(1) Mixing 50-80 parts of PMMA, 5-20 parts of heat-resistant agent and 0-1 part of antioxidant in a high-speed premixer to obtain a premix A;
(2) Premixing 20-40 parts of ASA, 0-1 part of a light stabilizer and 0-2 parts of toner in a high-speed premixer to obtain a premix B;
(3) And then the premixed material A is conveyed to the B through a double-screw extruder in a quantitative mode through a metering pump by side feeding, the extrusion temperature is 190-250 ℃, the rotating speed of a main machine is 300-600 r/min, and the ASA/PMMA alloy resin which is free of spraying, high in toughness, high in heat resistance and high in laser transmittance and can be used for laser welding can be obtained under the conditions that the temperature is cooled and granulated, and the rotating speed of a granulator is 800-1000 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211121422.5A CN115490979B (en) | 2022-09-15 | 2022-09-15 | ASA/PMMA for spraying-free, high-toughness, high-heat-resistance and high-laser-transmittance laser welding and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211121422.5A CN115490979B (en) | 2022-09-15 | 2022-09-15 | ASA/PMMA for spraying-free, high-toughness, high-heat-resistance and high-laser-transmittance laser welding and preparation method thereof |
Publications (2)
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