CN108285503B - 高软化点萜烯树脂及其制备方法 - Google Patents

高软化点萜烯树脂及其制备方法 Download PDF

Info

Publication number
CN108285503B
CN108285503B CN201810167361.3A CN201810167361A CN108285503B CN 108285503 B CN108285503 B CN 108285503B CN 201810167361 A CN201810167361 A CN 201810167361A CN 108285503 B CN108285503 B CN 108285503B
Authority
CN
China
Prior art keywords
terpene resin
softening point
acid catalyst
lewis acid
pinene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201810167361.3A
Other languages
English (en)
Other versions
CN108285503A (zh
Inventor
杨韶平
刘娟娟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuzhou University
Original Assignee
Wuzhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuzhou University filed Critical Wuzhou University
Priority to CN201810167361.3A priority Critical patent/CN108285503B/zh
Publication of CN108285503A publication Critical patent/CN108285503A/zh
Application granted granted Critical
Publication of CN108285503B publication Critical patent/CN108285503B/zh
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F32/00Homopolymers and copolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system
    • C08F32/02Homopolymers and copolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system having no condensed rings
    • C08F32/04Homopolymers and copolymers of cyclic compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic ring system having no condensed rings having one carbon-to-carbon double bond
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00Processes of polymerisation
    • C08F2/04Polymerisation in solution
    • C08F2/06Organic solvent
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00Polymerisation catalysts
    • C08F4/06Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen
    • C08F4/12Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen of boron, aluminium, gallium, indium, thallium or rare earths
    • C08F4/14Boron halides or aluminium halides; Complexes thereof with organic compounds containing oxygen
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00Polymerisation catalysts
    • C08F4/06Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen
    • C08F4/20Metallic compounds other than hydrides and other than metallo-organic compounds; Boron halide or aluminium halide complexes with organic compounds containing oxygen of antimony, bismuth, vanadium, niobium or tantalum
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00Post-polymerisation treatments
    • C08F6/06Treatment of polymer solutions
    • C08F6/10Removal of volatile materials, e.g. solvents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00Inks
    • C09D11/30Inkjet printing inks
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D145/00Coating compositions based on homopolymers or copolymers of compounds having no unsaturated aliphatic radicals in a side chain, and having one or more carbon-to-carbon double bonds in a carbocyclic or in a heterocyclic system; Coating compositions based on derivatives of such polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Abstract

本发明公开了一种高软化点萜烯树脂,其软化点≥150℃,是在溶剂和路易斯酸催化剂的存在下由β‑蒎烯和α‑蒎烯发生聚合反应生成。其中,所述路易斯酸催化剂为无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的复配物。本发明还公开了所述高软化点萜烯树脂的制备方法。本发明提供的萜烯树脂软化点高,可以解决现有萜烯树脂软化点相对较低,达不到一些高档汽车漆、喷墨等方面的要求的问题。

Description

高软化点萜烯树脂及其制备方法
技术领域
本发明涉及萜烯树脂及其制备方法,尤其涉及高软化点萜烯树脂及其制备方法。
背景技术
萜烯树脂是由松节油中萜烯混合物聚合而成,又称聚萜烯树脂,化学分子式为(C10H16)n,平均分子量为650-1250。萜烯树脂是一种优良的增粘剂,具有粘接力强、抗老化性能好、内聚力高、耐热、耐光、耐酸、耐碱、耐臭、无毒等优良性能。萜烯树脂还具有低气味、高硬度、高附着力、抗氧化性和热稳定性好、相容性和溶解性好的优点,特别是在EVA系、SIS系、SBS系等热熔胶中具有优良的相容性、耐候性及增粘效果,因此被广泛应用于各大工业领域。胶粘剂方面:热熔胶、压敏胶、万能胶、封口胶、胶水等;涂料方面:汽车漆、模板漆,内外墙乳胶漆,防火乳胶漆,建筑涂料等;橡胶领域:天然橡胶、合成橡胶、乳胶、生胶、液体橡胶、粉末橡胶等;纺织皮革领域:印花胶粘剂、织物粘贴热熔胶、衬布加工热熔胶、地毯背胶用热熔胶等;包装材料:包装胶、封装粘合剂、食品包装粘合剂、饮料封装粘合剂、烟包用胶等;油墨材料:纸张印刷油墨、包装箱印刷油墨、溶剂型油墨、树脂型油墨等;食品方面:食品添加剂、口香糖等。
随着汽车工业的不断发展,人们对汽车的外形、色彩、光泽度的要求不断提高。最新版本的萜烯树脂标准LY/T 1453-2010,规定萜烯树脂的软化点要大于等于80℃,同时规定了不同规格的萜烯树脂的软化点,其中萜烯树脂T-120软化点需大于等于120℃。目前的萜烯树脂的软化点虽满足LY/T 1453-2010要求,但是对于目前的高档汽车漆来说,软化点还是太低,不能满足需求,大大影响了其在一些高档汽车漆、喷墨方面的使用。
发明内容
本发明的目的之一在于提供一种高软化点萜烯树脂,其解决了现有萜烯树脂软化点相对较低,达不到一些高档汽车漆、喷墨等方面的要求的问题。
本发明目的之二在于提供上述高软化点萜烯树脂的制备方法。
本发明目的之一通过以下技术方案来实现:一种高软化点萜烯树脂,其软化点>150℃,是在溶剂和路易斯酸催化剂的存在下由原料发生聚合反应生成,其中,所述路易斯酸催化剂为无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的复配物。
所述路易斯酸催化剂中,无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的质量比为4~10:1~2:1。
本发明的聚合反应过程中,将反应器内温度保持在-10℃~-20℃,滴入含有β-蒎烯和α-蒎烯的原料,原料的滴加时间为1~2h,保温4~5h后,终止聚合反应。
作为本发明的一个实施例,所述原料中,96%≤β-蒎烯<100%,0<α-蒎烯≤1%。所述溶剂、原料和路易斯酸催化剂的质量比为0.6~1.2:0.8~1:0.3~0.6。所述溶剂为甲苯。
本发明目的之二通过以下技术方案来实现:一种高软化点萜烯树脂的制备方法,在溶剂和路易斯酸催化剂的存在下由原料发生聚合反应生成,其中,所述路易斯酸催化剂为无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的复配物,其软化点>150℃。
所述路易斯酸催化剂中,无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的质量比为4~10:1~2:1。
本发明的聚合反应过程中,将反应器内温度保持在-10℃~-20℃,滴入含有β-蒎烯和α-蒎烯的原料,原料的滴加时间为1~2h,保温4~5h后,终止聚合反应。
作为本发明的一个实施例,所述原料中,96%≤β-蒎烯<100%,0<α-蒎烯≤1%。所述溶剂、原料和路易斯酸催化剂的质量比为0.6~1.2:0.8~1:0.3~0.6。所述溶剂为甲苯。
进一步地,本发明在聚合反应到达反应时间期限后,往反应器中的反应液加入热水破坏路易斯酸催化剂活性,终止聚合反应,所得反应液依次进行热水水洗,酸洗,再水洗至反应液呈中性,沉清,取油层进行常压蒸馏回收溶剂,之后在减压状态下进行水蒸汽活气喷提带出油分和低聚物,获得纯化的高软化点萜烯树脂。
所述热水水洗所使用的热水温度为70℃~90℃,反应液与热水的体积比为1:1~2。
所述酸洗所使用的溶液为0.5~1%的盐酸溶液,反应液与盐酸溶液的体积比为1:0.5~1.7。
所述水蒸汽活气喷提的喷提釜系统压力为3~8kPa,喷提塔釜温度为230℃~260℃。
本发明具有以下优点:
1.本发明人通过多年对松节油中萜烯成分结构的研究和反复进行路易斯酸催化剂复配正交试验,根据市场对高软化点萜烯树脂的需要,通过使用合适的路易斯酸催化剂结合优化的聚合反应工艺来提高萜烯树脂的聚合度,增大分子量,从而达到了提高软化点的目的。
2.本发明优化了萜烯树脂提纯工艺,在减压状态下水蒸汽活气喷提,有效地将残余的油分和影响软化点的低聚物与产品分离,达到了提高产品萜烯树脂软化点的目的。
具体实施方式
以下通过实施例对本发明的技术方案作进一步描述。
实施例1
将4g无水三氯化铝、1g无水三氯化锑和0.5g三氟化硼乙二醚进行复配的路易斯酸催化剂与100g甲苯加入反应器中混合均匀。使用冷媒将反应器内温度保持在-10℃,开始滴入80g原料,原料包含96.2%的β-蒎烯和0.8%的α-蒎烯。原料滴加时间为1h,保温4h,然后终止聚合反应,往反应器中加入80℃热水破坏反应液中路易斯酸催化剂活性,以200g 90℃热水进行水洗,采用300g浓度为0.5%的盐酸溶液进行酸洗,再水洗至溶液呈中性,沉清、分层,取油层进行常压蒸馏回收甲苯,之后送入喷提釜系统,使用水环真空泵抽真空至喷提釜系统压力为3kPa进行减压状态下水蒸汽活气喷提带出油分和低聚物。待喷提釜系统的喷提塔釜温度升至230℃时保温进行取样检测软化点,取样检测软化点为151℃,停止喷提、加热,用氮气进行排空,降温,出料,获得纯化的高软化点萜烯树脂。
实施例2
将12g无水三氯化铝、4g无水三氯化锑和2g三氟化硼乙二醚进行复配的路易斯酸催化剂与400g甲苯加入反应器中混合均匀,使用冷媒将反应器内温度保持在-15℃,开始滴入400g原料,原料包含96.2%的β-蒎烯和0.8%的α-蒎烯。原料滴加时间为1.5h,保温4.5h,然后终止聚合反应,往反应器中加入70℃热水破坏反应液中路易斯酸催化剂活性,以1600g70℃热水进行水洗,采用800g浓度为0.8%的盐酸溶液进行酸洗,再水洗至溶液呈中性,沉清、分层,然后取油层进行常压蒸馏回收甲苯,之后送入喷提釜系统,使用水环真空泵抽真空至喷提釜系统压力为5kPa进行减压状态下水蒸汽活气喷提带出油分和低聚物。待喷提釜系统的喷提塔釜温度升至245℃时保温进行取样检测软化点,取样检测软化点为153℃,停止喷提和加热,用氮气进行排空,降温,出料,获得纯化的高软化点萜烯树脂。
实施例3
将24g无水三氯化铝、4g无水三氯化锑和2g三氟化硼乙二醚进行复配的路易斯酸催化剂与800g甲苯加入反应器中混合均匀,使用冷媒将反应器内温度保持为-20℃,开始滴入1000g原料,原料包含96.2%的β-蒎烯和0.8%的α-蒎烯。原料滴加时间为2h,然后保温5h,然后终止聚合反应,往反应器中加入80℃热水破坏反应液中路易斯酸催化剂活性,以2000g 80℃热水进行水洗,采用1000g浓度为1%的盐酸溶液进行酸洗,再水洗至溶液呈中性,沉清、分层,然后取油层进行常压蒸馏回收甲苯,之后送入喷提釜系统,使用水环真空泵抽真空至喷提釜系统压力为8kPa进行减压状态下水蒸汽活气喷提带出油分和低聚物。待喷提釜系统的喷提塔釜温度升至260℃时保温进行取样检测软化点,取样检测软化点为152℃,停止喷提和加热,用氮气进行排空,降温,出料,获得纯化的高软化点萜烯树脂。
表1实施例1-3制备的萜烯树脂的检测结果
Figure GDA0002626439950000041
Figure GDA0002626439950000051

Claims (8)

1.一种高软化点萜烯树脂,其特征在于,其软化点>150℃,是在溶剂和路易斯酸催化剂的存在下由原料发生聚合反应生成,其中,所述路易斯酸催化剂为无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的复配物;所述路易斯酸催化剂中,无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的质量比为4~10:1~2:1;
所述原料中,96%≤β-蒎烯<100%,0<α-蒎烯≤1%;所述溶剂、原料和路易斯酸催化剂的质量比为0.6~1.2:0.8~1:0.3~0.6;所述溶剂为甲苯。
2.根据权利要求1所述的高软化点萜烯树脂,其特征在于,所述的聚合合成反应过程中,将反应器内温度保持在-10℃~-20℃,滴入含有β-蒎烯和α-蒎烯的原料,原料的滴加时间为1~2h,然后保温4~5h,终止聚合反应。
3.一种高软化点萜烯树脂的制备方法,其特征在于,在溶剂和路易斯酸催化剂的存在下由原料发生聚合反应生成,其中,所述路易斯酸催化剂为无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的复配物;所述路易斯酸催化剂中,无水三氯化铝、无水三氯化锑和三氟化硼乙二醚的质量比为4~10:1~2:1,其软化点>150℃;
所述原料中,96%≤β-蒎烯<100%,0<α-蒎烯≤1%;所述溶剂、原料和路易斯酸催化剂的质量比为0.6~1.2:0.8~1:0.3~0.6;所述溶剂为甲苯。
4.根据权利要求3所述的高软化点萜烯树脂的制备方法,其特征在于,所述聚合反应过程中,将反应器内温度保持在-10℃~-20℃,滴入含有β-蒎烯和α-蒎烯的原料,原料的滴加时间为1~2h,保温4~5h后,终止聚合反应。
5.根据权利要求4所述的高软化点萜烯树脂的制备方法,其特征在于,在聚合反应到达反应时间期限后,往反应器中的反应液加入热水破坏路易斯酸催化剂活性,终止聚合反应,所述反应液依次进行热水水洗,酸洗,再水洗至反应液呈中性,沉清,取油层进行常压蒸馏回收溶剂,之后在减压状态下进行水蒸汽活气喷提带出油分和低聚物,获得纯化的高软化点萜烯树脂。
6.根据权利要求5所述的高软化点萜烯树脂的制备方法,其特征在于,所述热水水洗所使用的热水温度为70℃~90℃,所述反应液与热水的体积比为1:1~2。
7.根据权利要求6所述的高软化点萜烯树脂的制备方法,其特征在于,所述酸洗所使用的溶液为0.5~1%的盐酸溶液,所述反应液与盐酸溶液的体积比为1:0.5~1.5。
8.根据权利要求6所述的高软化点萜烯树脂的制备方法,其特征在于,所述水蒸汽活气喷提中的喷提釜系统压力为3~8kPa,喷提塔釜温度为230℃~260℃。
CN201810167361.3A 2018-02-28 2018-02-28 高软化点萜烯树脂及其制备方法 Expired - Fee Related CN108285503B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810167361.3A CN108285503B (zh) 2018-02-28 2018-02-28 高软化点萜烯树脂及其制备方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810167361.3A CN108285503B (zh) 2018-02-28 2018-02-28 高软化点萜烯树脂及其制备方法

Publications (2)

Publication Number Publication Date
CN108285503A CN108285503A (zh) 2018-07-17
CN108285503B true CN108285503B (zh) 2020-10-02

Family

ID=62833003

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810167361.3A Expired - Fee Related CN108285503B (zh) 2018-02-28 2018-02-28 高软化点萜烯树脂及其制备方法

Country Status (1)

Country Link
CN (1) CN108285503B (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109535318B (zh) * 2018-11-29 2020-12-29 梧州学院 高软化点萜烯树脂的制备方法
CN111072830B (zh) * 2019-12-31 2022-08-30 黎月清 一种水芹烯树脂乳液的制备方法
CN114316138A (zh) * 2021-12-31 2022-04-12 广东诺驰化工有限公司 一种萜烯树脂及其生产工艺

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016346A (en) * 1976-02-03 1977-04-05 Arizona Chemical Company Cationic polymerization process
US4048095A (en) * 1976-02-03 1977-09-13 Arizona Chemical Company Antimony halide catalyst system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4016346A (en) * 1976-02-03 1977-04-05 Arizona Chemical Company Cationic polymerization process
US4048095A (en) * 1976-02-03 1977-09-13 Arizona Chemical Company Antimony halide catalyst system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
α-蒎烯/β-蒎烯共聚物合成与表征;熊德元等;《应用化学》;20060825;第23卷(第08期);862-865 *

Also Published As

Publication number Publication date
CN108285503A (zh) 2018-07-17

Similar Documents

Publication Publication Date Title
CN108285503B (zh) 高软化点萜烯树脂及其制备方法
JP5650069B2 (ja) テルペン樹脂−及び炭化水素樹脂−系の界面活性剤並びに粘着性付与剤樹脂の水性分散物
US2943125A (en) Production of dimers and low molecular polymerization products from ethylene
TW201410722A (zh) 二烯類的聚合
EP2043859B1 (en) Styrenated terpene resin as well as methods of making and using the same
CN102977615A (zh) 一种改性松香增粘树脂及其制备方法与应用
CN101891862A (zh) 一种改性萜烯树脂及其制备方法
US5326791A (en) Process for separation of hydrolyzable from non-hydrolyzable waste plastics for recovery of starting materials and other conversion processes, respectively
CN111072854A (zh) 一种苯酚改性c9石油树脂及其制备方法
CA2006434A1 (en) Process for the improved production of (meth) acrylic acid esters of polyhydric alcohols (ii)
CN104927615A (zh) 一种低游离单体含量的tdi三聚体哑光固化剂的制备方法
CN102993386B (zh) 一种辐照接枝制备改性c5石油树脂的方法
CN109535318B (zh) 高软化点萜烯树脂的制备方法
CN102993977A (zh) 氢化松香三甘醇酯的制备方法
US4108944A (en) Metal salts of modified anhydride resin
JPH08253560A (ja) テルペン−フェノール樹脂の製造方法
CN106905481B (zh) 一种制备官能化dcpd石油树脂的方法
CN100398591C (zh) 丁基型橡胶粘合剂配混料
EP2868720A1 (en) Printing ink with nitrated lignin ester as binder component
FR2832718A1 (fr) Procede ameliore pour synthetiser une resine d'adhesivite
JPS6128508A (ja) 新規炭化水素樹脂およびそれを用いた接着剤用添加剤
CN112142658A (zh) 一种低伯胺防老剂tmq的制备方法
CN107345116A (zh) 一种改性松香增粘树脂及其制备方法与应用
CN1261088A (zh) 用于纸品和包装制品的低苯裱胶水及其制造方法
CN107880160A (zh) 一种无色氢化萜烯树脂的制备方法

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201002

CF01 Termination of patent right due to non-payment of annual fee