CN1693265A - Multifunctional assistant for cement concrete - Google Patents
Multifunctional assistant for cement concrete Download PDFInfo
- Publication number
- CN1693265A CN1693265A CN 200510020658 CN200510020658A CN1693265A CN 1693265 A CN1693265 A CN 1693265A CN 200510020658 CN200510020658 CN 200510020658 CN 200510020658 A CN200510020658 A CN 200510020658A CN 1693265 A CN1693265 A CN 1693265A
- Authority
- CN
- China
- Prior art keywords
- water
- agent
- weight part
- saponification
- auxiliary agent
- 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.)
- Granted
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 27
- 239000004568 cement Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 12
- 239000000839 emulsion Substances 0.000 claims abstract description 11
- 239000012188 paraffin wax Substances 0.000 claims abstract description 8
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 claims abstract description 7
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 claims abstract description 7
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 6
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000008117 stearic acid Substances 0.000 claims abstract description 5
- 238000007127 saponification reaction Methods 0.000 claims description 18
- 239000012752 auxiliary agent Substances 0.000 claims description 15
- 238000004945 emulsification Methods 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000013019 agitation Methods 0.000 claims description 3
- 239000004927 clay Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000012745 toughening agent Substances 0.000 claims description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 8
- 239000003921 oil Substances 0.000 description 7
- 235000019198 oils Nutrition 0.000 description 7
- 239000010913 used oil Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000011381 foam concrete Substances 0.000 description 3
- 125000001165 hydrophobic group Chemical group 0.000 description 3
- 239000003223 protective agent Substances 0.000 description 3
- 239000010902 straw Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052740 iodine Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000693 micelle Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002052 molecular layer Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 239000000344 soap Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004902 Softening Agent Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 239000010721 machine oil Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000010773 plant oil Substances 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 235000015112 vegetable and seed oil Nutrition 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Landscapes
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A multifunctional assistant in the form of saponified emulsion for cement concrete is proportionally prepared polyvinyl alcohol, stearic acid, paraffin wax, rosin, oil foot, ammonia water and water. Its can be used as demoulding agent, antirusting agent, curing agent and strengthening agent.
Description
Technical field:
The present invention is relevant with the concrete auxiliary agent, and is especially relevant with concrete releasing agent and protective agent.
Background technology:
At Cement Concrete, concrete prefabricated parts and production foam concrete, during the building block of steam press maintenance concrete, in order to protect template, to prevent goods or member and template bonding; For the smooth surface, the corner angle that make product neat, attractive in appearance, must be at the contact position of template and goods coating release agent.
For a long time, China's building trade is made releasing agent with machine oil or used oil always.Its advantage is that stripping result is better.Shortcoming is that (the 1kg used oil only is coated with 2.5-4m to consumption greatly
2) cost height (1kg used oil price is greater than 1.3 yuan), pollute goods and environment, constructional difficulties again.In recent years, begin to occur block releasing agent, powdery or granular releasing agent on the market.Its common advantage: transportation, storage are conveniently.Shortcoming is to use and is subjected to condition restriction often.Will use steam-melting earlier as the soap blank releasing agent, adding 10 times of hot water and a certain amount of lyophobic dust again can use; Powdered mold release agents should add 9-10 times of water gaging (about T ℃=60 ℃) when using makes it can use after the dissolving.But after the dissolving, in use can precipitate, answer during use that stir on the limit, the limit brushing, waste greatlyyer, cost is higher.Because they are all with steam heating or hot water dissolving.General building site and concrete factory for prefabrication lack this kind condition, and therefore, many units still make remover with used oil.
In order to make the moisture content in the pour concrete can very fast evaporation, when making hydrated cementitious and producing intensity enough moisture content is arranged, thereby construction quality is guaranteed, must use protective agent.Traditional method is topped gunnysack, straw bag, sawmilling or a plastic cloth on the concrete of the demoulding, and constantly sprinkles water maintenance more than 7 days.The shortcoming of this kind method is a lot, waters on topped thing, and straight, the inclined-plane of concrete is difficult to maintenance, because water consumption is big, be difficult to carry out in arid, water-deficient area, the plastic cloth on concrete is aging easily, damaged lap-joint, the evaporation of moisture content piece speed influences construction quality.
It is by acrylate polymer emulsion that Chinese patent application discloses " water-base liquid film-type concrete curing agent " for No. 02111497, compositions such as wax emulsion, film coalescence aid, wetting agent, softening agent and flow agent.Film forming properties and certain penetrating quality are arranged, prevent water evaporates, but cost is higher.
Summary of the invention:
The purpose of this invention is to provide a kind of use extensively, demoulding, antirust, maintenance, strengthen the property goodly, easy to use, free from environmental pollution, production cost is low, is convenient to the multifunctional assistant for cement concrete of storing, transporting.
The present invention is achieved in that
Multifunctional assistant for cement concrete of the present invention, it is the saponification emulsion of being made by the raw material of following weight part:
Polyvinyl alcohol 2.4-7
Stearic acid 0.6-3
Paraffin 6.6-14
Rosin 3-8
Oil cake 5.4-12
Ammoniacal liquor 0.77-1.93
Water 34.86-85.3,
Water is heated to 90-95 ℃ in the emulsification pot, get above-mentioned raw materials except that ammoniacal liquor, add in the emulsification pot stir, dissolve, mixing, under agitation slowly add ammoniacal liquor, make in the emulsification pot melt saponification, emulsification.
Be mixed with releasing agent, rust-preventive agent, curing agent, toughener in the water with 1 weight part auxiliary agent adding 40-50 weight part.
Be mixed with the clay brick releasing agent in the water with 1 weight part auxiliary agent adding 4-5 weight part.
The present invention directly makes saponification emulsion with stearic acid, polyvinyl alcohol, plant oil cake, paraffin, rosin, ammoniacal liquor.During use by different purposes, selects different amount of water and at the construction field (site) water directly prepare, processing, transportation, store, use is all very convenient.The invention belongs to broad spectrum type saponification releasing agent, both be fit to the plastering demoulding, be fit to do the Cement Concrete and the goods demoulding thereof again, in Cement Concrete, both be fit to do the Cement Concrete goods of Cement Concrete, foam concrete and the centrifugal forming of normal temperature, normal pressure or low temperature, low pressure vibrating forming, member (as pipeline, the tower bar etc.) demoulding is adapted at the concrete building block demoulding of steam (T ℃=100, P=0.1Mpa) maintenance moulding again, after reducing water consumption, also can produce the releasing agent of clay brick.
Polyvinyl alcohol among the present invention rises isolates and protective effect.Paraffin is the releasing agent finish.Oil cake is the residuum after the plant seed oil expression, makes the raw material and the filler of releasing agent.Separant, saponification promotor and protective agent are made in hard ester acid.Rosin can generate saponified and promote paraffin saponification, emulsification, owing to contain a large amount of sylvic acids, needs with alkaline substance neutralization, saponification, not only generates gum rosin but also work the pH value effect of regulating.Ammoniacal liquor is made saponified emulsifier (also available yellow soda ash, sodium hydroxide substitute).The present invention is according to the saponification reaction principle, with I, N, S value (greasy saponification value deducts its iodine number), S, R value (solubleness of soap and whipability) are as the reference of selecting raw material, selected suitable saponification, the cheap and good-quality again paraffin of emulsification, oil cake are made saponification, emulsification, select appropriate saponifying agent, saponification promotor and membrane-forming agent after heating for dissolving, generate thick oil-in-water (o/w) type saponification homogeneous emulsion.In emulsion, the emulsifying agent molecule is enclosed in around the film former particulate, makes hydrophobic group towards inside, and hydrophilic group aligns towards the outside, forms the micelle of band with a kind of electric charge, because like charges repels each other, the suction between micelle reduces, and distance increases.Therefore, the liquid after the dilution can keep the homogeneous milkiness aqueous, and good lubricity is arranged and become film uniformity.When being coated in this liquid on wooden model, the punching block,, just can on mould, generate the very thin barrier film of one deck along with water evaporates.In the molecular layer of this film, hydrophobic group points to the template top layer; Between each molecular layer, hydrophobic group and hydrophilic group both were in contact with one another, but were not closely connected, and can slide mutually.After the present invention is water-soluble, become oil-in-water (o/w) type emulsion, make greasy dirt not stain concrete surface and environment.Both made and polluted, saponified, tensio-active agent in the auxiliary agent also can be removed.After auxiliary agent was sprayed on the concrete pour mass, the polymer substance in the auxiliary agent both can infiltrate inside, can generate the lyophobic dust layer on pour mass surface with lyophobic dust again, prevented or reduced water evaporates.Therefore, tool of the present invention is isolated, and protection, antirust, enhancement function can make gypsum, the smooth demoulding of concrete goods, and make its smooth surface, and corner angle are clearly demarcated, and the intensity of goods is improved, and makes punching block avoid corrosion.
In the laboratory, the present invention is as gypsum, and during the releasing agent of Cement Concrete, foam concrete goods, by auxiliary agent of the present invention: water=be mixed with liquid at 1: 40,1kg liquid can apply 10m
2Die surface, cost only are 0.016 yuan/m
2And used oil is 0.33 yuan of-0.52 yuan/m
2, this product only is the 1/20-1/32 when using used oil.When making the brick and tile releasing agent, auxiliary agent of the present invention: water=1: 4-5, cost are lower than 1.3 yuan/kg, be lower than the mixing oil releasing agent (＞2 yuan/kg).When the present invention makes curing agent, by auxiliary agent: water=1: 50 is made into liquid.1kg liquid can spray 20m
2Twice, 0.0032 yuan/m of raw materials cost
2(with straw bag is 0.50 yuan/m
2Sawdust is 0.2 yuan/m
2), be straw bag 1/158, sawdust 1/65.Concrete test block after the auxiliary agent spraying demoulding of the present invention 2 times, (in water, soaked 7 days after the demoulding with comparative group, took out airing 7 days) carry out 14 days intensity tests simultaneously and percentage of water loss is measured, the comparative group percentage of water loss is to be coated with of the present invention group 3.89 times, and ultimate compression strength only is to be coated with of the present invention group 88.8% (national specialized laboratory measures).
Embodiment:
Prescription of the present invention is as follows: weight part
The preparation technology of auxiliary agent of the present invention is as follows:
(1) by the good various raw materials of prescription weighing, ammoniacal liquor, water;
(2) water is injected the emulsification pot, be warming up to 90-95 ℃;
(3) add polyvinyl alcohol, stearic acid, paraffin, rosin, oil cake (first pulverize) successively, stir, make it to dissolve, various compositions are mixed;
(4) under agitation add ammoniacal liquor in the emulsification pot slowly, when occurring the tawny viscous liquid in the pot, from pot, take out a saponification emulsion with the bamboo bar, put into container filled with hot water, if drop disperses in water fast, the water surface does not have oil slick, material is described, and saponification is complete, if still have oil slick in the water, then continue to add ammoniacal liquor on a small quantity, fully saponified until material.The pH value of saponification this moment emulsion is 7-8.
Claims (3)
1, multifunctional assistant for cement concrete is characterized in that it is the saponification emulsion of being made by the raw material of following weight part:
Polyvinyl alcohol 2.4-7
Stearic acid 0.6-3
Paraffin 6.6-14
Rosin 3-8
Oil cake 5.4-12
Ammoniacal liquor 0.77-1.93
Water 34.86-85.3,
Water is heated to 90-95 ℃ in the emulsification pot, get above-mentioned raw materials except that ammoniacal liquor, add in the emulsification pot stir, dissolve, mixing, under agitation slowly add ammoniacal liquor, make in the emulsification pot melt saponification, emulsification.
2, the purposes of auxiliary agent according to claim 1 is mixed with releasing agent, rust-preventive agent, curing agent, toughener in the water with 1 weight part auxiliary agent adding 40-50 weight part.
3, the purposes of auxiliary agent according to claim 1 is mixed with the clay brick releasing agent in the water with 1 weight part auxiliary agent adding 4-5 weight part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510020658XA CN1317217C (en) | 2005-04-05 | 2005-04-05 | Multifunctional assistant for cement concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510020658XA CN1317217C (en) | 2005-04-05 | 2005-04-05 | Multifunctional assistant for cement concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1693265A true CN1693265A (en) | 2005-11-09 |
| CN1317217C CN1317217C (en) | 2007-05-23 |
Family
ID=35352410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510020658XA Expired - Fee Related CN1317217C (en) | 2005-04-05 | 2005-04-05 | Multifunctional assistant for cement concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1317217C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191120A (en) * | 2011-03-28 | 2011-09-21 | 遵义建泰轻质节能材料有限公司 | Foam concrete preform release agent and preparation method thereof |
| CN105272355A (en) * | 2015-10-09 | 2016-01-27 | 中南林业科技大学 | Tung oil modified paraffin emulsion and preparation and application methods thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180701A (en) * | 2011-01-21 | 2011-09-14 | 蒋绍敏 | Concrete curing agent |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3529084C1 (en) * | 1985-08-14 | 1986-10-16 | Thyssen Stahl AG, 4100 Duisburg | Process and plant for the production of binderless hot briquettes |
| US5143949A (en) * | 1989-01-23 | 1992-09-01 | Groco Specialty Coatings Company | Aqueous based, strippable coating composition and method |
| CN1044987C (en) * | 1996-04-03 | 1999-09-08 | 洪爵禄 | Expansion and adsorption type demoulding and curing agent for concrete, and process thereof |
| CN1121998C (en) * | 1999-07-22 | 2003-09-24 | 中国石油化工集团公司 | Emulsion type concrete curing agent |
| CN1171831C (en) * | 2002-04-26 | 2004-10-20 | 上海三瑞化学有限公司 | Water-base liquid film-type concrete curing agent |
| KR20040068511A (en) * | 2004-06-16 | 2004-07-31 | 주식회사 피마 | A surface active agent for grinding cement and its manufacturing process |
-
2005
- 2005-04-05 CN CNB200510020658XA patent/CN1317217C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102191120A (en) * | 2011-03-28 | 2011-09-21 | 遵义建泰轻质节能材料有限公司 | Foam concrete preform release agent and preparation method thereof |
| CN105272355A (en) * | 2015-10-09 | 2016-01-27 | 中南林业科技大学 | Tung oil modified paraffin emulsion and preparation and application methods thereof |
| CN105272355B (en) * | 2015-10-09 | 2017-05-31 | 中南林业科技大学 | A kind of tung oil-modified paraffin wax emulsions and its preparation and application |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1317217C (en) | 2007-05-23 |
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| C14 | Grant of patent or utility model | ||
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Owner name: SICHUAN HUASHI CONCRETE ENGINEERING CO., LTD. Free format text: FORMER OWNER: JIANG FAXUE Effective date: 20110413 |
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Free format text: CORRECT: ADDRESS; FROM: 610081 NO. 304, BUILDING 21, EAST ROAD 3, ERXIAN BRIDGE, CHENGDU CITY, SICHUAN PROVINCE TO: 610031 NO. 298, SECTION 2, CHENGHUA AVENUE, CHENGHUA DISTRICT, CHENGDU CITY, SICHUAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20110413 Address after: Chenghua District Chenghua road in Chengdu city of Sichuan province 610031 two No. 298 Patentee after: Sichuan Huaxi Concrete Engineering Co., Ltd. Address before: Three road 610081 Sichuan city of Chengdu province Erxian Qiaodong 21 Building No. 304 Patentee before: Jiang Faxue |
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| C56 | Change in the name or address of the patentee |
Owner name: SICHUAN HUASHI GREEN HOUSE BUILDING MATERIALS CO., Free format text: FORMER NAME: SICHUAN HUASHI CONCRETE ENGINEERING CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |
Address after: Chenghua District Chenghua road in Chengdu city of Sichuan province 610031 two No. 298 Patentee after: Sichuan Huashi Green House Building Materials Co., Ltd. Address before: Chenghua District Chenghua road in Chengdu city of Sichuan province 610031 two No. 298 Patentee before: Sichuan Huaxi Concrete Engineering Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070523 Termination date: 20190405 |
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| CF01 | Termination of patent right due to non-payment of annual fee |