CN1362428A - Polymethyl methacrylate as molding material and its prepn - Google Patents
Polymethyl methacrylate as molding material and its prepn Download PDFInfo
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- CN1362428A CN1362428A CN 02109059 CN02109059A CN1362428A CN 1362428 A CN1362428 A CN 1362428A CN 02109059 CN02109059 CN 02109059 CN 02109059 A CN02109059 A CN 02109059A CN 1362428 A CN1362428 A CN 1362428A
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- polymethyl methacrylate
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Abstract
The present invention uses (wt%) 70-96.5% of methyl methacrylate, 3.5-30% of phenylethylene and 0-5% of emthyl acrylate as raw material, mixes them, then adds adjuvant mixture formed from (wt%) 0.25-0.35% of n-dodecyl mercaptan (DDM), 0.08-0.11% of azobisisobutyronitrile (AIBN) into said raw material to make free radical solution polymerization reaction to obtain the invented product polymethyl methacrylate mould plastics. Its reaction temp. is 90-100 deg.C, reaction pressure is 0.05-0.09 MPa and reaction time is 4-9 hr.
Description
Technical field: the present invention relates to a kind of transparent thermoplastic moulding compound and manufacture method thereof.
Background technology: the industrial polymethylmethacrylate of producing with free radical polymerisation process (PMMA) is the ever-increasing thermoplastics of a kind of consumption, it has excellent optical property (gloss, very high transparency, transmittance surpass 92%), and hardness, hot formability, ageing-resistant performance and easily processing characteristics such as (cutting, polishing, bonding, crooked, injection mouldings) is all better.Because pure this thermoplastic polymer rigidity is big, so embrittlement easily in transportation, use.In order to improve its resistance to impact shock, can be to the enhancement additive that wherein adds based on resilient material.These additives normally have the polymkeric substance of multilayered structure, it can add with different ratios, make the inflexible thermoplastics obtain suitable resistance to impact shock to reach, but this method has been improved resistance to impact shock and has been reduced its optical property, flexural strength and thermal characteristics.At present with the poly methyl methacrylate polymer (PMI) of chemical process by the imidization modification, perhaps random polymkeric substance, their thermal characteristics is improved, yet, these polymkeric substance are not shock-resistant, for improving its resistance to impact shock, have only use just can obtain transparent material, but the ageing-resistant performance of this material can remarkable variation based on the polyhutadiene additive.
Summary of the invention: the present invention is transparent thermoplastic moulding compound and a manufacture method thereof of having developed a kind of polymethylmethacrylate, it solved can not having both that existing transparent thermoplastic moulding compound exists good thermal characteristics is arranged, the problem of shock resistance, the transparency and excellent ageing-resistant performance.Polymethyl methacrylate as molding material of the present invention is by following raw materials by weight percent: the multipolymer that methyl methacrylate 70-96.5, vinylbenzene 3.5-30, methyl acrylate 0-5 form.Manufacture method of the present invention is: get first comonomer methyl methacrylate 70-96.5 by weight percentage, the second comonomer vinylbenzene 3.5-30, the 3rd comonomer methyl acrylate 0-5, after three comonomers mixing, get following auxiliary agent by the weight percent of raw material: n-dodecyl mercaptan (DDM) 0.25-0.35, Diisopropyl azodicarboxylate (AIBN) 0.08-0.11, toluene solvant 40-60, carry out the free radical solution polymerization reaction in the raw material with adding after the auxiliary agent mixed preparing, temperature of reaction is 90-100 ℃, pressure is 0.05-0.09MPa, and reaction time is 4-9 hour.Reacted toluene solvant and mixture of polymers are heated to 240-280 ℃, and send into degas system, under the pressure of 0.01-0.02MPa, and rework solution paradigmatic system after toluene and the unreacted monomer gasification condensation.Molten polymer is sent into granulating system, obtains polymethyl methacrylate as molding material behind granulation cutting, dry packing.The optimum weight per-cent of each raw material is among the present invention: methyl methacrylate 84-90, vinylbenzene 7-12, methyl acrylate 1-5.Can contain other additive commonly used in the raw material of the present invention, as: stablizer, antioxidant, dyestuff, pigment etc.Product of the present invention can be used for preparing extruded sheet, can also make goods with injection moulding or other molding methods.The present invention makes radical initiator with Diisopropyl azodicarboxylate (AIBN), uses n-dodecyl mercaptan (DDM) as chain-transfer agent.Product of the present invention had both had good heat-resistant, the transparency and excellent ageing-resistant performance, had very high shock resistance again.
Description of drawings: Fig. 1 is the process flow sheet of manufacture method of the present invention.
Embodiment one: present embodiment is by following raw materials by weight percent: the multipolymer that methyl methacrylate 95, vinylbenzene 5 form.Its manufacture method is: according to the above ratio raw material is mixed, get following auxiliary agent by the weight percent of raw material: n-dodecyl mercaptan (DDM) 0.25-0.35, Diisopropyl azodicarboxylate (AIBN) 0.08-0.11, toluene solvant 40-60, with the auxiliary agent mixed preparing, secondary string data reactor is adopted in solution polymerization, temperature of reaction is 90-100 ℃, and pressure is 0.05--0.09MPa.The polymerization reactor agitator speed is 10-30 rev/min, and reaction time is 4-9 hour.The throughput of this device is 1500kg/h, monomer conversion 95%, reacted solvent toluene and mixture of polymers are heated to 240-280 ℃ and send into degas system, under the pressure of 0.01-0.02MPa, and rework solution paradigmatic system after toluene and the not anti-monomer gasification condensation.Molten polymer is sent into granulating system, obtains polymethyl methacrylate as molding material LX-040-S5 behind granulation cutting, dry packing.
Embodiment two: different it of present embodiment and embodiment one is by following raw materials by weight percent: methyl methacrylate 90, vinylbenzene 10, make polymethyl methacrylate as molding material LX-040-S10.Its manufacture method is identical with embodiment one.
Embodiment three: what present embodiment and embodiment one were different is that it is by following raw materials by weight percent: methyl methacrylate 85, vinylbenzene 15, make polymethyl methacrylate as molding material LX-040-S15.Its manufacture method is identical with embodiment one.
Embodiment four: what present embodiment and embodiment one were different is that it is by following raw materials by weight percent: methyl methacrylate 85, vinylbenzene 10, methyl acrylate 5, make polymethyl methacrylate as molding material LX-060-S10M.Its manufacture method is identical with embodiment one.
Table one is the contrast table of the product of embodiment one, two, three productions with the every index of product standard of prior art, and table two is the product of embodiment four productions contrast tables with the every index of product standard of prior art.
Table one:
Table two:
The thermotolerance of these moulding compound products and mechanical property all have raising largely, have the advantage of transparency height, ageing resistance, hot formability simultaneously.
Annotate: 1, the standard value of this explanation is from Q/HLX02-2000
2, stretching strength determination adopts GB/T1040
3, cantilever beam impact strength is measured and is adopted GB/T1843
4, Rockwell hardness is measured and is adopted GB/T9342
5, determination of light transmittance adopts GB/T2410
6, vicat softening temperature is measured and is adopted GB/T1633
7, heat-drawn wire is measured and is adopted GB/T1634 under the load
8, melt flow rate (MFR) is measured and is adopted GB/T1633.
Claims (6)
1, polymethyl methacrylate as molding material is characterized in that it is by following raw materials by weight percent: the multipolymer that methyl methacrylate 70-96.5, vinylbenzene 3.5-30, methyl acrylate 0-5 form.
2, polymethyl methacrylate as molding material according to claim 1 is characterized in that the weight percent of raw material is: methyl methacrylate 84-90, vinylbenzene 7-12, methyl acrylate 1-5.
3, the manufacture method of polymethyl methacrylate as molding material, it is characterized in that getting by weight percentage first comonomer methyl methacrylate 70-96.5, the second comonomer vinylbenzene 3.5-30, the 3rd comonomer methyl acrylate 0-5, after three comonomers mixing, get following auxiliary agent by the weight percent of raw material: n-dodecyl mercaptan (DDM) 0.25-0.35, Diisopropyl azodicarboxylate (AIBN) 0.08-0.11, toluene solvant 40-60, carry out the free radical solution polymerization reaction in the raw material with adding after the auxiliary agent mixed preparing, temperature of reaction is 90-100 ℃, pressure is 0.05-0.09MPa, and reaction time is 4-9 hour.
4, the manufacture method of polymethyl methacrylate as molding material according to claim 3, it is characterized in that reacted toluene solvant and mixture of polymers are heated to 240-280 ℃, and send into degas system, under the pressure of 0.01-0.02MPa, rework solution paradigmatic system after toluene and the unreacted monomer gasification condensation, molten polymer is sent into granulating system, obtains polymethyl methacrylate as molding material behind granulation cutting, dry packing.
5,, it is characterized in that solution polymerization employing secondary string data reactor according to the manufacture method of claim 3,4 described polymethyl methacrylate as molding material.
6, the manufacture method of polymethyl methacrylate as molding material according to claim 5 is characterized in that the polymerization reactor agitator speed is 10-30 rev/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021090599A CN1171917C (en) | 2002-01-18 | 2002-01-18 | Polymethyl methacrylate as molding material and its prepn |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021090599A CN1171917C (en) | 2002-01-18 | 2002-01-18 | Polymethyl methacrylate as molding material and its prepn |
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| Publication Number | Publication Date |
|---|---|
| CN1362428A true CN1362428A (en) | 2002-08-07 |
| CN1171917C CN1171917C (en) | 2004-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB021090599A Expired - Lifetime CN1171917C (en) | 2002-01-18 | 2002-01-18 | Polymethyl methacrylate as molding material and its prepn |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100532408C (en) * | 2006-11-10 | 2009-08-26 | 中国科学院理化技术研究所 | Method and device for continuous preparation of crylic acid resin by plug thin-layer tube reaction and twin-screw reactive extrusion |
| CN102140266A (en) * | 2011-04-15 | 2011-08-03 | 北京秀珀科技发展有限公司 | Polymethylmethacrylate waterproof paint and preparation method thereof |
| CN102336864A (en) * | 2011-06-16 | 2012-02-01 | 中国科学院长春应用化学研究所 | Preparation method for polymethyl methacrylate (PMMA) resin with high thermal stability |
| CN111349189A (en) * | 2020-04-26 | 2020-06-30 | 杨光云 | Flame-retardant nitrogen-phosphorus synergistic carbon nanotube modified acrylic resin material and preparation method thereof |
-
2002
- 2002-01-18 CN CNB021090599A patent/CN1171917C/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100532408C (en) * | 2006-11-10 | 2009-08-26 | 中国科学院理化技术研究所 | Method and device for continuous preparation of crylic acid resin by plug thin-layer tube reaction and twin-screw reactive extrusion |
| CN102140266A (en) * | 2011-04-15 | 2011-08-03 | 北京秀珀科技发展有限公司 | Polymethylmethacrylate waterproof paint and preparation method thereof |
| CN102140266B (en) * | 2011-04-15 | 2013-05-29 | 广州秀珀化工股份有限公司 | Polymethylmethacrylate waterproof paint and preparation method thereof |
| CN102336864A (en) * | 2011-06-16 | 2012-02-01 | 中国科学院长春应用化学研究所 | Preparation method for polymethyl methacrylate (PMMA) resin with high thermal stability |
| CN111349189A (en) * | 2020-04-26 | 2020-06-30 | 杨光云 | Flame-retardant nitrogen-phosphorus synergistic carbon nanotube modified acrylic resin material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1171917C (en) | 2004-10-20 |
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