WO2015047046A1 - 높은 유동성을 갖는 폴리카보네이트 및 그의 제조방법 - Google Patents
높은 유동성을 갖는 폴리카보네이트 및 그의 제조방법 Download PDFInfo
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- WO2015047046A1 WO2015047046A1 PCT/KR2014/009229 KR2014009229W WO2015047046A1 WO 2015047046 A1 WO2015047046 A1 WO 2015047046A1 KR 2014009229 W KR2014009229 W KR 2014009229W WO 2015047046 A1 WO2015047046 A1 WO 2015047046A1
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- polycarbonate
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- hydroxyphenyl
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- diphenol
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/26—General preparatory processes using halocarbonates
- C08G64/28—General preparatory processes using halocarbonates and phenols
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
- C08G64/06—Aromatic polycarbonates not containing aliphatic unsaturation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/16—Aliphatic-aromatic or araliphatic polycarbonates
- C08G64/1608—Aliphatic-aromatic or araliphatic polycarbonates saturated
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/18—Block or graft polymers
- C08G64/183—Block or graft polymers containing polyether sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/22—General preparatory processes using carbonyl halides
- C08G64/24—General preparatory processes using carbonyl halides and phenols
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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
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
Definitions
- the present invention relates to a polycarbonate having a high fluidity and a method for producing the same, and more particularly, to a polycarbonate having a high fluidity and a method for producing the same, including an aliphatic polyhydric alcohol-substituted diphenol compound in a polycarbonate backbone.
- Polycarbonates are well known for being tough and transparent high impact thermoplastics. However, polycarbonates also have a relatively large melt viscosity. Therefore, relatively high extrusion and molding temperatures are required to produce polycarbonates into molded articles. Much effort has been spent over the years to reduce the melt viscosity of polycarbonates while maintaining desirable physical properties. These methods include the use of plasticizers, the use of aliphatic chain stoppers, the reduction of molecular weights, the preparation of blends of polycarbonates and other polymers as well as bisphenols and various polycarbonate copolymers with long chain aliphatic substituents.
- plasticizers are generally used in conjunction with thermoplastics to achieve greater melt flow.
- incorporation of plasticizers into polycarbonate compositions involves undesirable characteristics such as brittleness and changeable properties of the plasticizers.
- the enhanced flowability can be readily obtained with the use of aliphatic chain stoppers, but the impact resistance measured with Notch Izod is quite poor. Brittleness can also be a problem.
- An object of the present invention relates to a polycarbonate having a high fluidity and a method for producing the same, including an aliphatic polyhydric alcohol-substituted diphenol compound in the polycarbonate backbone.
- High flowability polycarbonates include polymers of diphenol mixtures and carbonate precursors, wherein the diphenol mixtures comprise aliphatic polyhydric alcohol-substituted diphenol compounds and bisphenol compounds of the formula:
- R is hydrogen or an alkyl group having 1 to 4 carbon atoms
- n is an integer of 10 to 50.
- a method for producing a polycarbonate having a high fluidity is (1) a diphenol mixture by mixing 0.05 to 1.0% by weight of an aliphatic polyhydric alcohol-substituted diphenol compound of the formula (1) and 99.0 to 99.95% by weight of a bisphenol compound Mixing step to prepare;
- R is hydrogen or an alkyl group having 1 to 4 carbon atoms
- n is an integer of 10 to 50.
- an aliphatic polyhydric alcohol-substituted diphenol compound is introduced into a polycarbonate backbone formed by polymerization of a bisphenol compound such as bisphenol A or the like and a carbonate precursor such as phosgene or the like.
- Example 1 is a 1 H NMR spectrum of the comonomer hydroxybenzoate-PPG (HB PPG) prepared in Example 1.
- Figure 2 is a 1 H NMR spectrum of the comonomer prepared in Example 1 hydroxybenzoate-PPG (HB PPG) and the copolymerized copolycarbonate HB PPG-PC (Co-PC) in order from top to bottom As a result, the production of copolycarbonates can be confirmed by the peak shift that appears when HB-PPG is copolymerized.
- HB PPG hydroxybenzoate-PPG
- Co-PC copolymerized copolycarbonate
- the high fluidity polycarbonate according to the present invention includes a polymer of a diphenol mixture and a carbonate precursor, wherein the diphenol mixture comprises an aliphatic polyhydric alcohol-substituted diphenol compound and a bisphenol compound of the formula Features:
- R is hydrogen or an alkyl group having 1 to 4 carbon atoms
- n is an integer of 10 to 50.
- the aliphatic polyhydric alcohol-substituted diphenol compound of Formula 1 is preferably a polyethylene glycol-substituted diphenol compound in which R is hydrogen or a polypropylene glycol-substituted diphenol in which R is 1
- Compounds can be preferably used and have the effect of providing high fluidity to the polycarbonate obtained using them.
- the aliphatic polyhydric alcohol-substituted diphenol compound of Formula 1 is a compound having an ester bond form of 4-hydroxybenzoic acid and polypropylene (HO-phenyl-COO-PPG-OOC -phenyl-OH, wherein PPG is polypropylene glycol) can be used.
- n is preferably in the range of 10 to 50, preferably 20 to 50, more preferably 30 to 45.
- n is preferably in the range of 10 to 50, preferably 20 to 50, more preferably 30 to 45.
- the high flow polycarbonates according to the invention comprise from 1.0 to 1.2 moles, preferably from 1.05 to 1.15 moles, more preferably from 1.08 to 1.12 moles of polymer, based on 1 mole of diphenol mixture, wherein wherein the diphenol mixture comprises from 0.05 to 1.0% by weight of an aliphatic polyalcohol-substituted diphenol compound of formula 1 and a bisphenol compound, i.e., 99.0 to 99.95% by weight, as a balance:
- R is hydrogen or an alkyl group having 1 to 4 carbon atoms
- n is an integer of 10 to 50.
- the diphenol mixture is preferably 0.1 to 0.8% by weight, preferably 0.2 to 0.5% by weight, more preferably 0.2 to 0.4% by weight of the aliphatic polyhydric alcohol-substituted diphenol compound of Formula 1, and the remaining amount of bisphenol compound, That is, 99.2 to 99.9% by weight, preferably 99.5 to 99.8% by weight, more preferably 99.6 to 99.8% by weight, within this range to impart a high fluidity to the polycarbonate obtained according to the present invention while the preferred physical Properties, that is, the effect of giving a tough, transparent and high impact resistance.
- the bisphenol compounds include bis (4-hydroxyphenyl) methane, bis (4-hydroxyphenyl) ether, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide, bis (4-hydroxy Hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) ketone, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) propane (bisphenol A; BPA), 2 , 2-bis (4-hydroxyphenyl) butane, 1,1-bis (4-hydroxyphenyl) cyclohexane (bisphenol Z; BPZ), 2,2-bis (4-hydroxy-3,5-di Bromophenyl) propane, 2,2-bis (4-hydroxy-3,5-dichlorophenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 2,2-bis (4-hydroxy-3-chlorophenyl) propane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 2,2-
- the carbonate precursor may be at least one compound selected from the group consisting of phosgene, diphosgene, triphosgene, and bromophosgene, but the present invention is not intended to be limited thereto.
- These carbonate precursors are also those used in the production of polycarbonate, it can be understood to those skilled in the art to the extent that they can be purchased commercially from leading manufacturers at home and abroad.
- Polycarbonate having a high fluidity according to the present invention may have a weight average molecular weight of 20,000 to 100,000 g / mol, 40,000 to 50,000 g / mol, or 45,000 to 49,000 g / mol, for example, excellent flowability within this range There is.
- Polycarbonate having high fluidity according to the present invention has a notched impact strength of 700 to 900 J / m or 750 to 900 J / m, MFR value of 15 to 30, or 17 to 28, the physical properties balance within this range Has an excellent effect.
- Method for producing a polycarbonate having a high fluidity is (1) to prepare a diphenol mixture by mixing 0.05 to 1.0% by weight of aliphatic polyhydric alcohol-substituted diphenol compound of formula 1 and 99.0 to 99.95% by weight bisphenol compound Mixing step;
- R is hydrogen or an alkyl group having 1 to 4 carbon atoms
- n is an integer of 10 to 50.
- a process of separating and purifying the resin in an emulsion state by a method such as centrifugation or precipitation may be performed.
- a method such as centrifugation or precipitation
- triethylamine or quaternary ammonium salt may be used as the polymerization catalyst
- phenol or p-tert-butylphenol (p) may be used as the reaction terminator.
- -tert-butylphenol may be used, but the invention is not intended to be limited thereto.
- the basic medium may be an aqueous solution of the basic compound.
- the hydroxyl group of the diphenol compound is deprotonated, and the deprotonated oxygen of the diphenol compound is reacted through a carbonyl bond with the carbonate precursor.
- Chloroformate is formed, and the produced chloroformate is reacted with other diphenol compound molecules to remove chlorine anions, and the process of carbonate bonding is repeated to form polycarbonate.
- the basic compound may be at least one selected from the group consisting of alkali metal or alkaline earth metal compounds, and sodium hydroxide or potassium hydroxide may be preferably used as the alkali metal.
- the basic compound is preferably used in an amount of the diphenol mixture: the equivalent ratio of the basic compound in an amount within the range of 1: 1.0 to 1.8, and the polymerization efficiency is increased within this range. .
- the concentration of the basic compound in the basic medium is preferably used within the range of 5 to 15% by weight, and within this range, the effect of increasing the polymerization efficiency is provided.
- the weight unit / volume% which is the concentration unit, is 100% of the weight of the basic compound as the solute, with a total volume of a solution consisting of a basic compound as a solute and a solvent, preferably water as a solvent, unless otherwise indicated throughout the present specification. Defined in units of display.
- the organic solvent is an organic compound which is insoluble in water, insoluble in the polymerization reaction, and can dissolve the polycarbonate produced by the polymerization reaction.
- the organic solvent may be a chlorinated aliphatic hydrocarbon such as methylene chloride, tetrachloroethane, chloroform, 1,2-dichloroethylene, carbon tetrachloride, trichloroethane, dichloroethane and the like; Chlorinated aromatic hydrocarbons such as chlorobenzene, dichlorobenzene, chlorotoluene and the like; Acetophenone, cyclohexane, anisole and mixtures thereof, of which methylene chloride is most preferred.
- the reaction system in which the interfacial polymerization is performed by mixing and using the basic medium and the organic solvent is constructed.
- the organic solvent is preferably used in an amount within the range of 0.1 to 1 L based on 1 mole of the diphenyl mixture, and the interfacial polymerization proceeds effectively within this range, thereby providing an effect of increasing polymerization efficiency.
- the polymerization step is carried out by injecting the carbonate precursor for 10 to 120 minutes, preferably for 10 to 100 minutes, more preferably for 10 to 70 minutes, the injection of the carbonate precursor for a time within this range.
- the polymerization reaction proceeds constantly, thereby providing an effect of increasing the polymerization efficiency.
- the basic medium may further include one or more anti-coloring agents selected from the group consisting of sodium sulfate, sodium sulfite and sodium borohydride.
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 0.232 g (0.10 wt%) of comonomer and 231.7 g (99.90 wt%) of bisphenol A were used. .
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 0.464 g (0.20 wt%) of comonomer and 231.5 g (99.80 wt%) of bisphenol A were used. .
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 0.696 g (0.30 wt%) of comonomer and 231.3 g (99.70 wt%) of bisphenol A were used. .
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 0.928 g (0.40 wt%) of comonomer and 231 g (99.60 wt%) of bisphenol A were used. .
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 1.16 g (0.50 wt%) of comonomer and 230.8 g (99.50 wt%) of bisphenol A were used. .
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 2.32 g (1.00 wt%) of comonomer and 229.7 g (99.00 wt%) of bisphenol A were used. .
- a polycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 3.30 g of PTBP (para-tert butylphenol) was used without using a comonomer.
- PTBP para-tert butylphenol
- Example 1 Except not using a comonomer in Example 1 was prepared in the same manner as in Example 1 polycarbonate and injection specimens thereof.
- a polycarbonate and an injection sample thereof were prepared in the same manner as in Example 1, except that 5.10 g of PTBP (para-tert butylphenol) was used instead of the comonomer.
- PTBP para-tert butylphenol
- a polycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1 except that 5.4 g of PTBP (para-tert butylphenol) was used without using a comonomer.
- PTBP para-tert butylphenol
- a polycarbonate and an injection sample thereof were prepared in the same manner as in Example 1, except that 6.5 g of para-tert butylphenol (PTBP) was used instead of the comonomer in Example 1.
- PTBP para-tert butylphenol
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 4.64 g (2.00 wt%) of comonomer and 227.3 g (98.00 wt%) of bisphenol A were used. .
- a copolycarbonate and an injection specimen thereof were prepared in the same manner as in Example 1, except that 6.96 g (3.00 wt%) of comonomer and 225.0 g (97.00 wt%) of bisphenol A were used. .
- Weight average molecular weight measured by GPC (Agilent 1200 series) method as PC Standard.
- the copolycarbonate resins (Examples 1 to 7) of the present disclosure do not include HB-PPG (Comparative Examples 1 to 5), or polycarbonate resins containing an excess of 2.00% by weight or more ( In comparison with Reference Examples 1 and 2, it was confirmed that both the fluidity and the impact strength were excellent. In particular, in the case of Examples 3 to 5 containing 0.20 to 0.40% by weight of HB-PPG, it was confirmed that the physical property balance of fluidity and impact strength is the most excellent.
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Abstract
Description
구분 | HB-PPG 함량 | 분자량(g/mol) | Notched Izod Impact(J/m) | MFR |
실시예 1 | 0.05 | 48,200 | 870 | 12 |
실시예 2 | 0.10 | 48,500 | 875 | 15 |
실시예 3 | 0.20 | 48,200 | 870 | 17 |
실시예 4 | 0.30 | 48,300 | 865 | 21 |
실시예 5 | 0.40 | 48,600 | 770 | 24 |
실시예 6 | 0.50 | 48,100 | 710 | 28 |
실시예 7 | 1.00 | 48,300 | 590 | 35 |
비교예 1 | X | 68,300 | 910 | 3 |
비교예 2 | X | 48,500 | 860 | 10 |
비교예 3 | X | 43,000 | 780 | 15 |
비교예 4 | X | 40,400 | 680 | 22 |
비교예 5 | X | 37,500 | 530 | 30 |
참조예 1 | 2.00 | 47,900 | 380 | 41 |
참조예 2 | 3.00 | 48,000 | 260 | 43 |
Claims (16)
- 제 2 항에 있어서,상기 비스페놀 화합물은 비스(4-히드록시페닐)메탄, 비스(4-히드록시페닐)에테르, 비스(4-히드록시페닐)설폰, 비스(4-히드록시페닐)설폭사이드, 비스(4-히드록시페닐)설파이드, 비스(4-히드록시페닐)케톤, 1,1-비스(4-히드록시페닐)에탄, 2,2-비스(4-히드록시페닐)프로판 (비스페놀 A ; BPA), 2,2-비스(4-히드록시페닐)부탄, 1,1-비스(4-히드록시페닐)시클로헥산 (비스페놀 Z ; BPZ), 2,2-비스(4-히드록시-3,5-디브로모페닐)프로판, 2,2-비스(4-히드록시-3,5-디클로로페닐)프로판, 2,2-비스(4-히드록시-3-브로모페닐)프로판, 2,2-비스(4-히드록시-3-클로로페닐)프로판, 2,2-비스(4-히드록시-3-메틸페닐)프로판, 2,2-비스(4-히드록시-3,5-디메틸페닐)프로판, 1,1-비스(4-히드록시페닐)-1-페닐에탄, 비스(4-히드록시페닐)디페닐메탄, α,ω-비스[3-(ο-히드록시페닐)프로필]폴리디메틸실록산으로 이루어지는 군으로부터 선택되는 1종 이상의 화합물임을 특징으로 하는 폴리카보네이트.
- 제 2 항에 있어서,상기 카보네이트 전구물질이 포스겐, 디포스겐, 트리포스겐, 브로모포스겐으로 이루어지는 군으로부터 선택되는 1종 이상의 화합물임을 특징으로 하는 폴리카보네이트.
- 제 1 항에 있어서,상기 폴리카보네이트는 중량평균분자량이 20,000 내지 100,000 g/mol인 것을 특징으로 하는 폴리카보네이트.
- 제 1 항 내지 제 5 항 중 어느 한 항에 있어서,상기 폴리카보네이트는 노치드 충격강도가 700 내지 900 J/m이고, MFR값이 15 내지 30인 것을 특징으로 하는 폴리카보네이트.
- (1) 하기 화학식 1의 지방족 다가알코올-치환 디페놀 화합물 0.05 내지 1.0중량%와 비스페놀 화합물 99.0 내지 99.95중량%를 혼합하여 디페놀 혼합물을 준비하는 혼합단계;(2) 상기 디페놀 혼합물을 염기성 매질에 용해시킨 후, 상기 디페놀 혼합물이 용해된 디페놀 용액에 유기용매를 첨가하여 반응혼합물을 수득하는 용해단계; 및(3) 상기 용해단계에서 수득되는 반응혼합물에 상기 디페놀 혼합물 1몰을 기준으로 카보네이트 전구물질 1.0 내지 1.2몰(1.05 내지 1.15몰, 1.08 내지 1.12몰)을 주입하여 계면중합시켜 폴리카보네이트를 수득하는 중합단계;를 포함함을 특징으로 하는 폴리카보네이트의 제조방법:[화학식 1]상기 식에서, R은 수소 또는 탄소수 1 내지 4의 알킬기이고, n은 10 내지 50의 정수임.
- 제 7 항에 있어서,상기 용해단계에서 상기 염기성 매질이 염기성 화합물의 수용액임을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 8 항에 있어서,상기 염기성 화합물이 알칼리금속 또는 알칼리토금속 화합물로 이루어지는 군으로부터 선택되는 1종 이상임을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 9 항에 있어서,상기 알칼리금속이 수산화나트륨 또는 수산화칼륨임을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 8 항에 있어서,상기 염기성 화합물이 상기 디페놀 혼합물 : 상기 염기성 화합물의 당량비가 1 : 1.0 내지 1.8의 범위 이내의 양으로 사용됨을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 8 항에 있어서,상기 염기성 매질 중의 염기성 화합물의 농도가 5 내지 15중량/부피%의 범위 이내임을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 7 항에 있어서,상기 용해단계에서 상기 유기용매가 염화메틸렌, 테트라클로로에탄, 클로로포름, 1,2-디클로로에틸렌, 사염화탄소, 트리클로로에탄, 디클로로에탄; 클로로벤젠, 디클로로벤젠, 클로로톨루엔; 아세토페논, 시클로헥산, 아니솔 및 이들의 혼합물을 포함하여 이루어지는 군으로부터 선택되는 1종 이상임을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 13 항에 있어서,상기 유기용매가 상기 디페닐 혼합물 1몰을 기준으로 0.1 내지 1ℓ의 범위 이내의 양으로 사용됨을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 7 항에 있어서,상기 중합단계가 상기 카보네이트 전구물질을 10 내지 120분 동안 주입하는 것에 의해 수행됨을 특징으로 하는 폴리카보네이트의 제조방법.
- 제 7 항에 있어서,상기 염기성 매질에 황산나트륨, 아황산나트륨, 수소화붕소나트륨으로 이루어지는 군으로부터 선택되는 1종 이상의 착색방지제가 더 포함될 수 있다. 특징으로 하는 폴리카보네이트의 제조방법.
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CN201480003122.4A CN104812798B (zh) | 2013-09-30 | 2014-09-30 | 具有高流动性的聚碳酸酯及其制备方法 |
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KR102008378B1 (ko) * | 2015-07-01 | 2019-08-09 | 주식회사 엘지화학 | 폴리카보네이트 수지, 이의 제조방법 및 이를 포함하는 성형품 |
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CN104812798B (zh) | 2017-08-15 |
KR20150037663A (ko) | 2015-04-08 |
EP2907837A4 (en) | 2016-04-27 |
EP2907837A1 (en) | 2015-08-19 |
KR101702182B1 (ko) | 2017-02-13 |
JP6103327B2 (ja) | 2017-03-29 |
CN104812798A (zh) | 2015-07-29 |
US9328197B2 (en) | 2016-05-03 |
EP2907837B1 (en) | 2018-02-07 |
US20150299387A1 (en) | 2015-10-22 |
JP2015535545A (ja) | 2015-12-14 |
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