CN111909801A - Low-foam deoiling concentrated surfactant composition - Google Patents

Low-foam deoiling concentrated surfactant composition Download PDF

Info

Publication number
CN111909801A
CN111909801A CN202010907494.7A CN202010907494A CN111909801A CN 111909801 A CN111909801 A CN 111909801A CN 202010907494 A CN202010907494 A CN 202010907494A CN 111909801 A CN111909801 A CN 111909801A
Authority
CN
China
Prior art keywords
parts
deoiling
surfactant
foam
low
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
CN202010907494.7A
Other languages
Chinese (zh)
Inventor
苏敏
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.)
Guangdong Lichen Aowei Industrial Co ltd
Original Assignee
Guangdong Lichen Aowei Industrial 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 Guangdong Lichen Aowei Industrial Co ltd filed Critical Guangdong Lichen Aowei Industrial Co ltd
Priority to CN202010907494.7A priority Critical patent/CN111909801A/en
Publication of CN111909801A publication Critical patent/CN111909801A/en
Pending legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/83Mixtures of non-ionic with anionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005Other compounding ingredients characterised by their effect
    • C11D3/0026Low foaming or foam regulating compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/0005Other compounding ingredients characterised by their effect
    • C11D3/0084Antioxidants; Free-radical scavengers
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/20Organic compounds containing oxygen
    • C11D3/2075Carboxylic acids-salts thereof
    • C11D3/2086Hydroxy carboxylic acids-salts thereof
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/20Organic compounds containing oxygen
    • C11D3/22Carbohydrates or derivatives thereof
    • C11D3/222Natural or synthetic polysaccharides, e.g. cellulose, starch, gum, alginic acid or cyclodextrin
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/37Polymers
    • C11D3/3746Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C11D3/3757(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions
    • C11D3/3765(Co)polymerised carboxylic acids, -anhydrides, -esters in solid and liquid compositions in liquid compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/38Products with no well-defined composition, e.g. natural products
    • C11D3/382Vegetable products, e.g. soya meal, wood flour, sawdust
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/48Medical, disinfecting agents, disinfecting, antibacterial, germicidal or antimicrobial compositions
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/008Polymeric surface-active agents
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/04Carboxylic acids or salts thereof
    • C11D1/10Amino carboxylic acids; Imino carboxylic acids; Fatty acid condensates thereof
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • C11D1/12Sulfonic acids or sulfuric acid esters; Salts thereof
    • C11D1/22Sulfonic acids or sulfuric acid esters; Salts thereof derived from aromatic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/662Carbohydrates or derivatives
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/72Ethers of polyoxyalkylene glycols
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/74Carboxylates or sulfonates esters of polyoxyalkylene glycols

Abstract

The invention provides a low-foam deoiling concentrated surfactant composition which comprises the following components in parts by weight: 30-40 parts of polyoxyethylene fatty alcohol ether, 15-20 parts of polyoxyethylene oleate, 5-10 parts of sodium lauroyl sarcosinate, 5-8 parts of deoiling component, 3-7 parts of sodium alginate, 1-2 parts of flavonoid-containing plant extract, 1-5 parts of suspending agent, 1-2 parts of essence and 1-8 parts of water; the deoiling component consists of a sulfonate surfactant, an alkyl polyglycoside surfactant and citric acid. The concentrated surfactant composition has excellent cleaning capacity, less foam, high deoiling capacity and low material cost.

Description

Low-foam deoiling concentrated surfactant composition
Technical Field
The invention relates to the technical field of surfactants, in particular to a low-foam deoiling concentrated surfactant composition.
Background
The surfactant is a substance which can obviously reduce the interfacial tension when the addition amount is small, and the molecule of the surfactant has a unique structure: one end is a hydrophilic polar group and the other end is a lipophilic non-polar group, also known as an amphipathic molecule. Can spontaneously form stable and orderly arranged association structures such as micelles, lyotropic liquid crystals, microemulsions, vesicles, vermicular micelles, microemulsion gels and the like in a solution. Widely applied to various aspects of human production and life, commonly known as industrial monosodium glutamate.
However, surfactants generally have foaming properties which contribute to their application in the fields of daily chemicals such as toothpaste, bath foam, laundry detergent, shampoo, etc., but in many industrial fields, particularly in the field of high-tech material development, or in zero-emission industrial production of water recycling, such foams cause fatal damage, leading to problems of poor application properties of materials, or interruption of production and processing of materials due to foam, or water pollution of production processes of materials due to foam, aggravating wastewater treatment burden, etc. In order to reduce foams generated in the use of the surfactant, industrial product manufacturers using the surfactant often add various types of defoaming agents, so that the industrial production cost is increased, the self biodegradability of the defoaming agent is poor, the defoaming agent is accumulated in zero-emission circulating water for a long time, and the COD (chemical oxygen demand) and BOD (biochemical oxygen demand) in the water are increased, so that the difficulty and the cost of later-stage water treatment are increased.
In addition, the common surfactant has the problem of insufficient degreasing property, and has poor degreasing effect on petroleum and the like. Therefore, a need exists for a surfactant composition that has less lather and greater oil removal.
Disclosure of Invention
In view of the above problems, the present invention provides a low-foam degreasing concentrated surfactant composition having excellent cleaning ability, less foam, high degreasing ability, and low material cost.
In order to achieve the purpose, the invention is solved by the following technical scheme:
a low-foam degreasing concentrated surfactant composition comprises the following components in parts by weight: 30-40 parts of polyoxyethylene fatty alcohol ether, 15-20 parts of polyoxyethylene oleate, 5-10 parts of sodium lauroyl sarcosinate, 5-8 parts of deoiling component, 3-7 parts of sodium alginate, 1-2 parts of flavonoid-containing plant extract, 1-5 parts of suspending agent, 1-2 parts of essence and 1-8 parts of water;
the deoiling component consists of a sulfonate surfactant, an alkyl polyglycoside surfactant and citric acid.
Specifically, the deoiling component is prepared from a sulfonate surfactant, an alkyl polyglycoside surfactant and citric acid according to a mass ratio of 10-15: 5-10: 1.
Specifically, the sulfonate surfactant is one selected from C10-C18 alkylbenzene sulfonic acids.
Specifically, the alkyl polyglycoside surfactant is one selected from C8-C16 alkyl polyglycoside.
Specifically, the plant extract containing flavonoids is selected from one of folium Ginkgo extract, lemon peel extract, mandarin orange peel extract, tartary buckwheat leaf extract, and folium crataegi extract.
Specifically, the suspending agent is acrylate copolymer.
The invention has the beneficial effects that:
firstly, the concentrated surfactant composition provided by the invention takes polyoxyethylene fatty alcohol ether, polyoxyethylene oleate and sodium lauroyl sarcosinate as main cleaning components, and has excellent cleaning capability on dirt after being compounded and used;
secondly, the degreasing component consisting of a sulfonate surfactant, an alkyl polyglycoside surfactant and citric acid is added, so that the degreasing agent can effectively remove oil stains and has high degreasing efficiency;
thirdly, sodium alginate is added, the sodium alginate forms gel when meeting water in a concentrated solution system, and a film layer is formed on the surface of the composition, so that the essence in the composition can be effectively prevented from being lost;
fourthly, plant extracts containing flavonoid compounds are also added, and the plant extracts containing the flavonoid compounds have excellent characteristics of oxidation resistance, bacteria resistance and the like.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments in order to provide a further understanding of the nature and technical means of the invention, as well as the specific objects and functions attained by the invention.
Example 1
A low-foam degreasing concentrated surfactant composition comprises the following components in parts by weight: 35 parts of polyoxyethylene fatty alcohol ether, 15 parts of polyoxyethylene oleate, 10 parts of sodium lauroyl sarcosinate, 6 parts of deoiling component, 5 parts of sodium alginate, 1 part of plant extract containing flavonoid compounds, 2 parts of suspending agent, 1 part of essence and 4 parts of water; the deoiling component is prepared from dodecyl benzene sulfonic acid, dodecyl polyglycoside and citric acid according to the mass ratio of 10: 5: 1.
And (3) testing: the foam height at 25 ℃ was measured using 5g of the above composition, and the detergency of the composition was measured by a method described in "measurement of detergency and circulating washing performance of detergent for clothing" GB/T13174-2008, and the record is as shown in table 1 below.
Example 2
A low-foam degreasing concentrated surfactant composition comprises the following components in parts by weight: 30 parts of polyoxyethylene fatty alcohol ether, 20 parts of polyoxyethylene oleate, 10 parts of sodium lauroyl sarcosinate, 6 parts of deoiling component, 5 parts of sodium alginate, 1 part of plant extract containing flavonoid compounds, 2 parts of suspending agent, 1 part of essence and 5 parts of water;
the deoiling component is prepared from dodecyl benzene sulfonic acid, dodecyl polyglycoside and citric acid according to the mass ratio of 10: 5: 1.
And (3) testing: the foam height at 25 ℃ was measured using 5g of the above composition, and the detergency of the composition was measured by a method described in "measurement of detergency and circulating washing performance of detergent for clothing" GB/T13174-2008, and the record is as shown in table 1 below.
Comparative example 1
5g of a common commercially available AES concentrate was measured for foam height at 25 ℃ and the detergency of the common commercially available AES concentrate was measured by the test method of GB/T13174-2008. determination of detergency and circular detergency for clothes, and the record is as shown in Table 1 below.
TABLE 1 test results
Example 1 Example 2 Comparative example 1
Stain removal value 1.9 1.7 1.4
Height/cm of foam 2.1 1.8 4.3
It was tested that examples 1, 2, using the surfactant composition of the present application, had a much higher stain removal value and a significantly lower foam height than the conventional commercially available AES concentrate of comparative example 1.
The above examples only show 2 embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (6)

1. The low-foam deoiling concentrated surfactant composition is characterized by comprising the following components in parts by weight: 30-40 parts of polyoxyethylene fatty alcohol ether, 15-20 parts of polyoxyethylene oleate, 5-10 parts of sodium lauroyl sarcosinate, 5-8 parts of deoiling component, 3-7 parts of sodium alginate, 1-2 parts of flavonoid-containing plant extract, 1-5 parts of suspending agent, 1-2 parts of essence and 1-8 parts of water;
the deoiling component consists of a sulfonate surfactant, an alkyl polyglycoside surfactant and citric acid.
2. The low-foam degreasing concentrated surfactant composition according to claim 1, wherein the degreasing component is prepared from a sulfonate surfactant, an alkyl polyglycoside surfactant and citric acid in a mass ratio of 10-15: 5-10: 1.
3. A low foaming degreasing concentrated surfactant composition as claimed in claim 2 wherein said sulfonate surfactant is selected from the group consisting of C10-C18 alkyl benzene sulfonic acids.
4. The low foam degreasing concentrated surfactant composition of claim 2, wherein the alkyl polyglycoside surfactant is selected from the group consisting of C8-C16 alkyl polyglycosides.
5. The low foaming deoiling concentrated surfactant composition as claimed in claim 1, wherein said flavonoid containing plant extract is selected from one of ginkgo biloba extract, lemon peel extract, citrus peel extract, tartary buckwheat leaf extract, hawthorn leaf extract.
6. The low foam degreasing concentrated surfactant composition of claim 1 wherein the suspending agent is an acrylate copolymer.
CN202010907494.7A 2020-09-02 2020-09-02 Low-foam deoiling concentrated surfactant composition Pending CN111909801A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010907494.7A CN111909801A (en) 2020-09-02 2020-09-02 Low-foam deoiling concentrated surfactant composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010907494.7A CN111909801A (en) 2020-09-02 2020-09-02 Low-foam deoiling concentrated surfactant composition

Publications (1)

Publication Number Publication Date
CN111909801A true CN111909801A (en) 2020-11-10

Family

ID=73266238

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010907494.7A Pending CN111909801A (en) 2020-09-02 2020-09-02 Low-foam deoiling concentrated surfactant composition

Country Status (1)

Country Link
CN (1) CN111909801A (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1491084A (en) * 2001-02-16 2004-04-21 Encapsulated flavor and/or fragrance composition
CN101596428A (en) * 2009-07-08 2009-12-09 工合聚能(天津)石油精化科技发展有限公司 A kind of molecular compound surfactant and preparation method thereof
CN105985869A (en) * 2015-02-02 2016-10-05 上海净安化工科技有限公司 Concentrated multifunctional detergent
CN106753861A (en) * 2016-11-24 2017-05-31 嘉兴德扬生物科技有限公司 A kind of Closestool cleanser of antibacterial lasting and preparation method thereof
CN111518633A (en) * 2020-05-22 2020-08-11 四川君和环保股份有限公司 Oil sludge cleaning agent and preparation method thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1491084A (en) * 2001-02-16 2004-04-21 Encapsulated flavor and/or fragrance composition
CN101596428A (en) * 2009-07-08 2009-12-09 工合聚能(天津)石油精化科技发展有限公司 A kind of molecular compound surfactant and preparation method thereof
CN105985869A (en) * 2015-02-02 2016-10-05 上海净安化工科技有限公司 Concentrated multifunctional detergent
CN106753861A (en) * 2016-11-24 2017-05-31 嘉兴德扬生物科技有限公司 A kind of Closestool cleanser of antibacterial lasting and preparation method thereof
CN111518633A (en) * 2020-05-22 2020-08-11 四川君和环保股份有限公司 Oil sludge cleaning agent and preparation method thereof

Similar Documents

Publication Publication Date Title
FI57610B (en) FLYTANDE SYNTHETIC TVAETTMEDELKOMPOSITIONER UTAN STOEDSUBSTANSER
US4122043A (en) Amidobetaine containing detergent composition non-toxic to aquatic life
KR100674408B1 (en) All purpose cleaner with low organic solvent content
TWI235763B (en) Aqueous solution of detergent composition and cleaning method
US4224195A (en) Process for handwashing socks or stockings
US3929680A (en) Liquid detergent composition
DK161715B (en) HIGH-FOAMING, LIQUID DETERGENT PRODUCT BASED ON NON-IONOGENT SURFACTIVE AGENT
JPS61255999A (en) Liquid detergent
BRPI0406700B1 (en) Liquid detergent composition and method of use
PT1165730E (en) All purpose liquid bathroom cleaning compositions
CN108179425B (en) A kind of environmental protection degreaser
US4002579A (en) Detergent composition
KR940010121B1 (en) Detergent composition
RU2147312C1 (en) All-purpose microemulsion liquid cleansing compositions
CN108192760A (en) A kind of anhydrous liquid detergent and preparation method thereof
JP2001181692A (en) Liquid detergent composition for local washing
RU2075507C1 (en) Liquid detergent
US3629122A (en) Low-foaming rinsing and washing agents for dish washers
US4938893A (en) Detersive systems and low foaming aqueous surfactant solutions containing a mono (C1-4 alkyl)-di(C6-20 alkyl)-amine oxide compound
CN112375632B (en) Environment-friendly bio-based cleaning aerosol and preparation method thereof
CN104152284B (en) High-efficiency concentrated detergent liquid
CN111909801A (en) Low-foam deoiling concentrated surfactant composition
EP1362908B1 (en) Liquid detergent composition
Burns Hydrotropic properties of some short‐chain alkylbenzene‐and alkylnaphthalene sulfonates
CN111150671B (en) Heavy oil dirt removing hand sanitizer and preparation method thereof

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: 20201110