CN107523011A - Modified phenolic warming plate using nitrogen as foaming agent - Google Patents

Modified phenolic warming plate using nitrogen as foaming agent Download PDF

Info

Publication number
CN107523011A
CN107523011A CN201710826845.XA CN201710826845A CN107523011A CN 107523011 A CN107523011 A CN 107523011A CN 201710826845 A CN201710826845 A CN 201710826845A CN 107523011 A CN107523011 A CN 107523011A
Authority
CN
China
Prior art keywords
nitrogen
parts
foaming
agent
phenolic
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.)
Pending
Application number
CN201710826845.XA
Other languages
Chinese (zh)
Inventor
李明树
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.)
JINZHOU HOWAR INSULATION MATERIAL Co Ltd
Original Assignee
JINZHOU HOWAR INSULATION MATERIAL Co Ltd
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 JINZHOU HOWAR INSULATION MATERIAL Co Ltd filed Critical JINZHOU HOWAR INSULATION MATERIAL Co Ltd
Priority to CN201710826845.XA priority Critical patent/CN107523011A/en
Publication of CN107523011A publication Critical patent/CN107523011A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/04Condensation polymers of aldehydes or ketones with phenols only
    • C08L61/06Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/122Hydrogen, oxygen, CO2, nitrogen or noble gases
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/06CO2, N2 or noble gases
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2361/00Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2361/04Condensation polymers of aldehydes or ketones with phenols only
    • C08J2361/06Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/32Phosphorus-containing compounds
    • C08K2003/329Phosphorus containing acids
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00Applications
    • C08L2203/14Applications used for foams
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend

Abstract

Modified phenolic warming plate using nitrogen as foaming agent, belongs to energy-saving building materialses technical field.The warming plate is formulated by following raw materials in parts by weight number:55 ~ 85 parts of thermosetting phenolic resin;25 ~ 40 parts of nitrogen;5 ~ 25 parts of aerosil;15 ~ 30 parts of curing agent;2 ~ 8 parts of foam stabilizer;2 ~ 10 parts of plasticized modifier.By raw material weight proportioning of soup processed, thermosetting phenolic resin, aerosil, foam stabilizer and plasticized modifier are mixed in advance, add curing agent, it is put into simultaneously in stirring system, in whipping process, nitrogen is passed through stirring system, adjustment nitrogen pressure is in the range of 0.6Mpa 0.8Mpa;In the range of 65 DEG C ~ 75 DEG C, foaming raw material is filled with the Quality Initiative plate temperature of stirring system with stirring and nitrogen, is gradually completed foaming process, is solidified into phenolic foam heat insulation plate.The present invention provides non-homogeneous physical fence for foam, makes the reduction of phenolic-aldehyde heat-insulation board thermal conductivity factor by the use of nitrogen as foaming agent.Increase fire savety, reduce production cost.

Description

Modified phenolic warming plate using nitrogen as foaming agent
Technical field
The present invention relates to a kind of modified phenolic warming plate, belong to energy-saving building materialses technical field.
Background technology
At present, conventional modified phenolic warming plate is using thermosetting phenolic resin as body material, adds surfactant, Using the low boiling organic solvent such as pentamethylene as foaming agent, under acidic catalyst effect, after each component is sufficiently mixed, foaming Compound foams at a temperature of 60Co ~ 75Co, curing molding.In conventional modified phenolic warming plate produces component, usually adopt With lower boiling naphthene series(Pentamethylene, hexamethylene, cyclobutane etc.)Organic solvent be modified phenolic warming plate foaming agent, when When foam mixture reaches certain temperature, the lower boiling naphthene series foaming agent in material starts to volatilize to outside material, now table Emulsifying materials are mixed with material solidification and occurred by face activating agent, are finally had phenol formaldehyde foam and are closed porous, lightweight foam Body.Naphthene series foaming agent is used in foam mixture, though belonging to environmentally friendly class foaming agent, the product of production has to pass through enough old Change the time, foaming agent in the foam is gradually escaped, otherwise in the case where meeting fire, reduce flameproof effect or " glowing " occur Deng detrimental effect, consider unsafe factor be present from production process, economically waste petroleum resources, cost is high.
The content of the invention
In order to solve above-mentioned technical problem, the present invention provides a kind of modified phenolic using nitrogen as foaming agent and is incubated Plate.
The purpose of the present invention is achieved through the following technical solutions:Modified phenolic warming plate using nitrogen as foaming agent, It is characterized in that:It is formulated by following raw materials in parts by weight number:
55 ~ 85 parts of thermosetting phenolic resin;
25 ~ 40 parts of nitrogen;
5 ~ 25 parts of aerosil;
15 ~ 30 parts of curing agent;
2 ~ 8 parts of foam stabilizer;
2 ~ 10 parts of plasticized modifier.
Described curing agent is phosphoric acid and ethylene glycol 1:1 weight than mixed solvent.
Described foam stabilizer selects silicon-carbon type silicone oil or polyethylene oxide condensate.
Described plasticized modifier selects polyhexamethylene adipamide.
A kind of preparation method using nitrogen as the improvement phenolic-aldehyde heat-insulation board of foaming agent, it is characterised in that step is as follows:
1)Matched by raw material weight number, thermosetting phenolic resin, aerosil, foam stabilizer and plasticized modifier are premixed Together, mixture A is formed;
2)The mixture A that step 1 is obtained by weight ratio is as foaming raw material and curing agent while adds stirring system, is stirring During mixing, nitrogen is passed through stirring system, adjustment nitrogen pressure is in the range of 0.6Mpa-0.8Mpa;The control of stirring system For chain plate temperature in the range of 65 DEG C ~ 75 DEG C, foaming raw material is gradually complete under stirring with the addition of curing agent and nitrogen Into foaming process, phenolic foam heat insulation plate is solidified into.
Beneficial effects of the present invention:The present invention uses such scheme, uses conventional thermoset phenolic resin to be foamed for main body Raw material;Cycloalkanes in conventional foam mixture is substituted with nitrogen, is on the one hand inert gas in view of nitrogen, stable performance, extensively Among general source air, economical and easily available, energy-conserving and environment-protective.On the other hand, nitrogen provides non-homogeneous physical fence for foam(That is closed pore knot Structure), make the reduction of phenolic-aldehyde heat-insulation board thermal conductivity factor.Furthermore density of nitrogen is less than atmospheric density, is not easy to be trapped in foaming raw material. Specifically, the density difference of gas and liquid is very big, and bubble rises liquid level quickly, and foam is heaped by many single isolated bubbles Aggregate, the stability of foam depend primarily on discharge opeing speed and Film strength, to make foam easily generate and can be stabilized, Prevent that phenolic foam board abscess is few, density is big, thermal conductivity factor increase.Fire savety can be effectively increased using nitrogen, and because Eliminate naphthene series foaming agent and reduce production cost.The present invention uses aerosil to produce phenolic aldehyde for nitrogen gas foaming agent and protected The modified additive of warm plate, aerosil are nano level fluffy powder, and because its silicon grain footpath is small, porosity is high, specific surface area Greatly, superficial attractive forces are strong, good dispersion;Aerosil is anti-settling to Foamex component, has thickening property, rheological characteristic, touches Denaturation and resist sagging characteristic;Because aerosil surface is seriously coordinated deficiency, and huge specific surface area and surface are oxygen debt etc. Feature, it is shown extremely strong activity, be distributed in the space of macromolecular chain, toughness, ductility increase substantially, simultaneously With enhancing, strengthening action;After adding aerosil by Foamex, using aerosil feature, make nitrogen It is relatively easy to add in liquid resin, while increase phenolic-aldehyde heat-insulation board physical property, delay liquid drain age velocity in film also to increase Foam life.For the bubble that avoids collapsing, complete to solidify in the stipulated time, add curing agent, the present invention selects acid curing agent(Phosphoric acid with Ethylene glycol presses 1:1 weight compares mixed solvent);Using silicon-carbon type silicone oil(DC-193)Or polyethylene oxide condensate is as foam stabilizer, Surface tension is reduced, makes foam uniform.Plasticized modifier selects polyhexamethylene adipamide(Modification of nylon 66), avoid phenol formaldehyde foam There is fragility phenomenon.
Embodiment
Embodiment 1
Modified phenolic warming plate using nitrogen as foaming agent, is formulated by following raw materials in parts by weight number;Thermosetting phenolic tree 55 parts of fat;40 parts of nitrogen;10 parts of aerosil;30 parts of curing agent;5 parts of foam stabilizer;5 parts of plasticized modifier.
Wherein acid curing agent is phosphoric acid and ethylene glycol 1:1 mixed solvent.Foam stabilizer selects silicon-carbon type silicone oil(DC- 193).Plasticized modifier selects polyhexamethylene adipamide(Modification of nylon 66).
Specific preparation process is as follows:
1)Matched by raw material weight number, by thermosetting phenolic resin, aerosil, silicon-carbon type silicone oil(DC-193)With it is poly- Hexamethylene adipamide(Modification of nylon 66)Mix in advance, form mixture A;
2)The mixture A that step 1 is obtained by weight ratio is as foaming raw material and acid curing agent(Phosphoric acid and ethylene glycol 1:1 Mixed solvent)Stirring system is added simultaneously, in whipping process, nitrogen is passed through stirring system, adjustment nitrogen pressure exists In the range of 0.6Mpa-0.8Mpa;Nitrogen overall control is passed through in aforementioned weight number proportion, i.e. the weight of total nitrogen amount It is 40 parts to measure number, and the Quality Initiative plate temperature of stirring system is in the range of 65 DEG C ~ 75 DEG C, and foaming raw material is with curing agent and nitrogen Addition, under stirring, gradually complete foaming process, be solidified into phenolic foam heat insulation plate.
Embodiment 2
Modified phenolic warming plate using nitrogen as foaming agent, is formulated by following raw materials in parts by weight number;Thermosetting phenolic tree 85 parts of fat;30 parts of nitrogen;25 parts of aerosil;15 parts of curing agent;8 parts of foam stabilizer;10 parts of plasticized modifier.
Specific preparation process is as follows:
1)By raw material weight number match, by thermosetting phenolic resin, aerosil, polyethylene oxide condensate and gather oneself two Acyl hexamethylene diamine(Modification of nylon 66)Mix in advance, form mixture A;
2)The mixture A that step 1 is obtained by weight ratio is as foaming raw material and acid curing agent(Phosphoric acid and ethylene glycol 1:1 Mixed solvent)Stirring system is added simultaneously, in whipping process, nitrogen is passed through stirring system, adjustment nitrogen pressure exists In the range of 0.6Mpa-0.8Mpa;Nitrogen overall control is passed through in aforementioned weight number proportion, i.e. the weight of total nitrogen amount It is 30 parts to measure number, and the Quality Initiative plate temperature of stirring system is in the range of 65 DEG C ~ 75 DEG C, and foaming raw material is with curing agent and nitrogen Addition, under stirring, gradually complete foaming process, be solidified into phenolic foam heat insulation plate.
Embodiment 3
Modified phenolic warming plate using nitrogen as foaming agent, is formulated by following raw materials in parts by weight number;Thermosetting phenolic tree 60 parts of fat;25 parts of nitrogen;5 parts of aerosil;20 parts of curing agent;8 parts of foam stabilizer;8 parts of plasticized modifier.
Specific preparation process is as follows:
1)By raw material weight number match, by thermosetting phenolic resin, aerosil, polyethylene oxide condensate and gather oneself two Acyl hexamethylene diamine(Modification of nylon 66)Mix in advance, form mixture A;
2)The mixture A that step 1 is obtained by weight ratio is as foaming raw material and acid curing agent(Phosphoric acid and ethylene glycol 1:1 Mixed solvent)Stirring system is added simultaneously, in whipping process, nitrogen is passed through stirring system, adjustment nitrogen pressure exists In the range of 0.6Mpa-0.8Mpa;Nitrogen overall control is passed through in aforementioned weight number proportion, i.e. the weight of total nitrogen amount It is 25 parts to measure number, and the Quality Initiative plate temperature of stirring system is in the range of 65 DEG C ~ 75 DEG C, and foaming raw material is with curing agent and nitrogen Addition, under stirring, gradually complete foaming process, be solidified into phenolic foam heat insulation plate.
The phenolic foam board that above-described embodiment is prepared carries out service check, as a result as follows:
Technical performance index reaches national sector standard(JG/T515-2017)With Liaoning Province's provincial standard(DB21/T2171- 2013)Technical requirements, it is shown in Table 1.
The result of the test contrast in technical performance of table 1
By Liaoning Province's provincial standard(DB21/T2171-2013)Regulation, phenolic foam board are aged no less than 21 under field conditions (factors) My god, the stable state of technical performance is only, can be applied.
Phenolic foam board of the present invention can reduce digestion time, and digestion time was dropped to 7 days by 21 days under natural conditions.Ageing After test, phenolic-aldehyde heat-insulation board of the present invention increases than Conventional phenol-formaldehyde cystosepiment fire protecting performance, oxygen index (OI).

Claims (5)

1. using nitrogen as the modified phenolic warming plate of foaming agent, it is characterised in that:It is formulated by following raw materials in parts by weight number:
55 ~ 85 parts of thermosetting phenolic resin;
25 ~ 40 parts of nitrogen;
5 ~ 25 parts of aerosil;
15 ~ 30 parts of curing agent;
2 ~ 8 parts of foam stabilizer;
2 ~ 10 parts of plasticized modifier.
2. the modified phenolic warming plate according to claim 1 using nitrogen as foaming agent, it is characterised in that:Described solidification Agent is phosphoric acid and ethylene glycol 1:1 weight than mixed solvent.
3. the modified phenolic warming plate according to claim 1 using nitrogen as foaming agent, it is characterised in that:Described even bubble Silicon-carbon type silicone oil or polyethylene oxide condensate are selected in agent.
4. the modified phenolic warming plate according to claim 1 using nitrogen as foaming agent, it is characterised in that:Described toughness reinforcing Modifying agent selects polyhexamethylene adipamide.
5. a kind of preparation method using nitrogen as the improvement phenolic-aldehyde heat-insulation board of foaming agent, its feature as claimed in claim 1 exist In step is as follows:
1)Matched by raw material weight number, thermosetting phenolic resin, aerosil, foam stabilizer and plasticized modifier are premixed Together, mixture A is formed;
2)The mixture A that step 1 is obtained by weight ratio is as foaming raw material and curing agent while adds stirring system, is stirring During mixing, nitrogen is passed through stirring system, adjustment nitrogen pressure is in the range of 0.6Mpa-0.8Mpa;The control of stirring system For chain plate temperature in the range of 65 DEG C ~ 75 DEG C, foaming raw material is gradually complete under stirring with the addition of curing agent and nitrogen Into foaming process, phenolic foam heat insulation plate is solidified into.
CN201710826845.XA 2017-09-14 2017-09-14 Modified phenolic warming plate using nitrogen as foaming agent Pending CN107523011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710826845.XA CN107523011A (en) 2017-09-14 2017-09-14 Modified phenolic warming plate using nitrogen as foaming agent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710826845.XA CN107523011A (en) 2017-09-14 2017-09-14 Modified phenolic warming plate using nitrogen as foaming agent

Publications (1)

Publication Number Publication Date
CN107523011A true CN107523011A (en) 2017-12-29

Family

ID=60736885

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710826845.XA Pending CN107523011A (en) 2017-09-14 2017-09-14 Modified phenolic warming plate using nitrogen as foaming agent

Country Status (1)

Country Link
CN (1) CN107523011A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6210476B1 (en) * 1999-09-07 2001-04-03 Halliburton Energy Services, Inc. Foamed cement compositions and methods
US20080184642A1 (en) * 2007-02-05 2008-08-07 Laura Sebastian Latex foam insulation and method of making and using same
CN101602880A (en) * 2008-06-10 2009-12-16 朱培英 A kind of chemical slip casting strengthening material and preparation method thereof
CN101735553A (en) * 2010-01-07 2010-06-16 上海雅达特种涂料有限公司 Material for manufacturing modified phenolic fireproof insulating plate
CN102690494A (en) * 2012-06-08 2012-09-26 中国石油化工股份有限公司 Phenolic resin composition and foaming material prepared from same
CN104072941A (en) * 2014-07-18 2014-10-01 锦州市好为尔保温材料有限公司 Nano modified phenolic aldehyde foam insulation board and preparation method thereof
CN105683120A (en) * 2013-10-31 2016-06-15 建筑研究和技术有限公司 Geopolymer foam preparation for noncombustible, sound-absorbing and heat-insulated geopolymer foam component
CN106279965A (en) * 2015-06-11 2017-01-04 合肥杰事杰新材料股份有限公司 A kind of physical blowing fills anti-flaming polypropylene material and preparation method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6210476B1 (en) * 1999-09-07 2001-04-03 Halliburton Energy Services, Inc. Foamed cement compositions and methods
US20080184642A1 (en) * 2007-02-05 2008-08-07 Laura Sebastian Latex foam insulation and method of making and using same
CN101602880A (en) * 2008-06-10 2009-12-16 朱培英 A kind of chemical slip casting strengthening material and preparation method thereof
CN101735553A (en) * 2010-01-07 2010-06-16 上海雅达特种涂料有限公司 Material for manufacturing modified phenolic fireproof insulating plate
CN102690494A (en) * 2012-06-08 2012-09-26 中国石油化工股份有限公司 Phenolic resin composition and foaming material prepared from same
CN105683120A (en) * 2013-10-31 2016-06-15 建筑研究和技术有限公司 Geopolymer foam preparation for noncombustible, sound-absorbing and heat-insulated geopolymer foam component
CN104072941A (en) * 2014-07-18 2014-10-01 锦州市好为尔保温材料有限公司 Nano modified phenolic aldehyde foam insulation board and preparation method thereof
CN106279965A (en) * 2015-06-11 2017-01-04 合肥杰事杰新材料股份有限公司 A kind of physical blowing fills anti-flaming polypropylene material and preparation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张玉龙主编: "《塑料、橡胶助剂速查手册》", 31 August 2012, 中国纺织出版社 *

Similar Documents

Publication Publication Date Title
CN102838770B (en) Preparation method of phenolic foam boards
CN103694625B (en) A kind of modified phenolic foam body
CN106966670A (en) A kind of silicate-base light foam concrete and preparation method thereof
JP2017206714A5 (en)
CN104262567A (en) Flame-retardant polyurethane rigid foam taking melamine as basic characteristic and preparation method of flame-retardant polyurethane rigid foam
CN105367990A (en) Heat-insulating fireproof material based on phenolic aldehyde hollow microspheres and preparation method thereof
CN106280231A (en) A kind of sports equipment toughening modifying phenolic foam and preparation method thereof
CN105504200B (en) Combined polyether, polyurethane wood-imitation material and preparation method thereof
CN104356591A (en) Toughened enhanced phenolic foam insulation material and preparation method thereof
CN106380855A (en) Double-component organosilicon foam material and simple auxiliary foaming technique thereof
CN103232260A (en) Waterproof insulation lightweight high-strength gypsum sheet material and preparation method thereof
CN103865097A (en) Phenolic foam plate containing nanometer aerogel and production method of phenolic foam plate
CN104327449A (en) Phenolic foam heat-preservation material and preparation method thereof
CN104479092A (en) Low-density all-water open-cell hard polyurethane foam and preparation method thereof
CN107266853A (en) Phenolic foam heat insulation plate and preparation method thereof
CN107974037B (en) Application of graded lignin in preparation of phenolic foam thermal insulation material
CN1736936A (en) Urea-formaldehyde foam plastic heat-insulating board and its preparation method
CN104356592A (en) Phenolic foam insulation material improved by glass fiber powder and sericite
CN104262670A (en) Foaming agent composition, polyurethane foam and manufacturing method thereof
CN107523011A (en) Modified phenolic warming plate using nitrogen as foaming agent
CN103694626B (en) A kind of phenolic foams
CN106750168A (en) A kind of preparation method of flame retarded rigid polyurethane foams plastics
CN107083017A (en) A kind of normal temperature can send out synthesis and the foaming method of phenolic resin
CN104327452B (en) A kind of flame retardant type phenolic foam board
CN103374110A (en) Preparation method of foaming phenolic resin

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
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20171229