Comb polymers

Industry

CPC
C04B2103/006

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Parent Industries

CCHEMISTRY METALLURGY C04Concrete, cement, ceramics C04BLIME, MAGNESIA SLAG CEMENTS COMPOSITIONS THEREOF C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone

Current Industry

C04B2103/006Comb polymers

Industries

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Patents Grantslast 30 patents

Information Patent Grant
Self-repairing cement including microcapsule-in-microcapsule materi...
- Patent number 12,297,148
- Issue date May 13, 2025
- Saudi Arabian Oil Company
- Maxim Orlov
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for the manufacture of hydraulic binders from water treatmen...
- Patent number 12,275,673
- Issue date Apr 15, 2025
- Ardex Group GmbH
- Stephen Alan Brooks
- C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Information Patent Grant
Industrial fluids with dilution resistance and tunable viscosity, a...
- Patent number 12,264,103
- Issue date Apr 1, 2025
- BLUE NOSE TECHNOLOGIES LLC
- Nicholas A. Koster
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Method for producing photocatalytic mortar
- Patent number 12,264,102
- Issue date Apr 1, 2025
- National Chung Cheng University
- Chien-Yen Chen
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Class C fly ash-based cementitious materials, flowable fill, concre...
- Patent number 12,240,783
- Issue date Mar 4, 2025
- Eco Material Technologies IP LLC
- Clinton W. Pike
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement additive, cement admixture, cement composition, molded body,...
- Patent number 12,215,057
- Issue date Feb 4, 2025
- Nippon Shokubai Co., Ltd.
- Takeshi Takayama
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Compositions comprising an acrylic polymer and processes of prepari...
- Patent number 12,145,883
- Issue date Nov 19, 2024
- CAESARSTONE LTD.
- Erez Margalit
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Method for taking a core sample of a formation
- Patent number 12,116,859
- Issue date Oct 15, 2024
- Saudi Arabian Oil Company
- Paul Joseph Tarabbia
- E21 - EARTH DRILLING MINING
Information Patent Grant
Fluid loss additive for low-Portland or non-Portland cements
- Patent number 12,077,711
- Issue date Sep 3, 2024
- Halliburton Energy Services, Inc.
- William Cecil Pearl
- E21 - EARTH DRILLING MINING
Information Patent Grant
Comb polymers as blocking additives for swelling clays
- Patent number 12,017,957
- Issue date Jun 25, 2024
- Sika Technology AG
- Ulf Velten
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Cement slurries, cured cement and methods of making and use of these
- Patent number 12,006,261
- Issue date Jun 11, 2024
- Saudi Arabian Oil Company
- Simone Musso
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Multifunctional cement hydration heat control material and manufact...
- Patent number 11,993,542
- Issue date May 28, 2024
- SOBUTE NEW MATERIALS CO., LTD.
- Jiaping Liu
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Dispersion-based ready-to-use (RTU) technology with performance of...
- Patent number 11,958,775
- Issue date Apr 16, 2024
- Laticrete International, Inc.
- Suxin Wang
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Class C fly ash-based cementitious materials, flowable fill, concre...
- Patent number 11,919,810
- Issue date Mar 5, 2024
- Eco Material Technologies IP LLC
- Clinton W. Pike
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Construction material without a hydraulic binder
- Patent number 11,905,211
- Issue date Feb 20, 2024
- ETH Zurich
- Gnanli Landrou
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Concrete vacuum tube segment for hyper-speed transportation system...
- Patent number 11,773,021
- Issue date Oct 3, 2023
- KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY
- Gum Sung Ryu
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Grant
Self-healing composite of thermoset polymer and programmed super co...
- Patent number 11,767,263
- Issue date Sep 26, 2023
- Guoqiang Li
- D01 - NATURAL OR ARTIFICIAL THREADS OR FIBRES SPINNING
Information Patent Grant
Method of application of sliding-ring polymers to enhance elastic p...
- Patent number 11,760,915
- Issue date Sep 19, 2023
- Saudi Arabian Oil Company
- Hasmukh A. Patel
- E21 - EARTH DRILLING MINING
Information Patent Grant
Cement slurries, cured cement and methods of making and use of these
- Patent number 11,732,177
- Issue date Aug 22, 2023
- Saudi Arabian Oil Company
- Simone Musso
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Repair compound and methods of use
- Patent number 11,713,278
- Issue date Aug 1, 2023
- 3M Innovative Properties Company
- John E. Gozum
- E04 - BUILDING
Information Patent Grant
Compositions comprising an acrylic polymer and processes of prepari...
- Patent number 11,691,917
- Issue date Jul 4, 2023
- CAESARSTONE LTD.
- Erez Margalit
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Composition containing a semi-ordered calcium silicate hydrate
- Patent number 11,667,569
- Issue date Jun 6, 2023
- BASF SE
- Christoph Hesse
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Suspending agents obtained by micellar polymerization
- Patent number 11,649,390
- Issue date May 16, 2023
- Energy Solutions (US) LLC
- Arnaud Cadix
- E21 - EARTH DRILLING MINING
Information Patent Grant
Dispersant composition
- Patent number 11,608,295
- Issue date Mar 21, 2023
- Construction Research & Technology, GmbH
- Toshimi Matsumoto
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Fluid loss additive for low-Portland or non-Portland cements
- Patent number 11,584,877
- Issue date Feb 21, 2023
- Halliburton Energy Services, Inc.
- William Cecil Pearl
- E21 - EARTH DRILLING MINING
Information Patent Grant
Polyelectrolyte-layer forming block copolymers and compositions and...
- Patent number 11,533,910
- Issue date Dec 27, 2022
- Adama Makhteshim Ltd.
- Gilad Silbert
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Preventing or reducing plant growth by biocementation
- Patent number 11,512,021
- Issue date Nov 29, 2022
- DUST BIOSOLUTIONS GMBH
- Luitpold Fried
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Grant
Water-based gel-consolidation type lost circulation material system...
- Patent number 11,472,999
- Issue date Oct 18, 2022
- CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
- Yingrui Bai
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for coring that allows the preservation of in-situ soluble s...
- Patent number 11,434,718
- Issue date Sep 6, 2022
- Saudi Arabian Oil Company
- Paul Joseph Tarabbia
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Sequenced polymers for monitoring the filtrate
- Patent number 11,427,747
- Issue date Aug 30, 2022
- Rhodia Operations
- Arnaud Cadix
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
SOUND-ABSORBING MATERIAL BLOCK, METHOD FOR PREPARING THEREOF, AND E...
- Publication number 20250122124
- Publication date Apr 17, 2025
- AAC TECHNOLOGIES (NANJING) CO., LTD.
- Zhongyang Wang
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
CEMENTITIOUS COMPOSITION COMPRISING A POLYMERIC MICRO-GEL AS AN ANT...
- Publication number 20250115802
- Publication date Apr 10, 2025
- SNF Group
- Olivier BRAUN
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
SELF-HEATING AND SUSTAINABLE PAVEMENT SYSTEM AND METHOD
- Publication number 20250091943
- Publication date Mar 20, 2025
- Purdue Research Foundation
- Maria Mirian Velay Lizancos
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
ULTRA-HIGH-TOUGHNESS MULTIFUNCTIONAL SELF-ASSEMBLY C-S-H GEL MATERI...
- Publication number 20250034040
- Publication date Jan 30, 2025
- WUHAN UNIVERSITY OF TECHNOLOGY
- Chuanlin Hu
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
MIKTOARM STAR POLYMER AS CEMENT FLUID ADDITIVES
- Publication number 20250011514
- Publication date Jan 9, 2025
- Solenis Technologies, L.P.
- Leo Zhaoqing Liu
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
DUAL-SCALE TOUGHENED CEMENT-BASED COMPOSITE MATERIAL AND USE THEREOF
- Publication number 20250011235
- Publication date Jan 9, 2025
- QINGDAO UNIVERSITY OF TECHNOLOGY
- Dongshuai HOU
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHOD FOR TAKING A CORE SAMPLE OF A FORMATION
- Publication number 20250003311
- Publication date Jan 2, 2025
- Saudi Arabian Oil Company
- Paul Joseph Tarabbia
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
HIGH DENSITY WASHABLE MINING GROUTING REINFORCEMENT MATERIAL AND PR...
- Publication number 20240409466
- Publication date Dec 12, 2024
- CCRI (Beijing) New Material Technology Co., Ltd.
- Xiaofeng Yu
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CEMENT COMPOSITION, FLUID LOSS CONTROL AGENT, AND FLUID LOSS CONTRO...
- Publication number 20240376006
- Publication date Nov 14, 2024
- KURARAY CO., LTD.
- Takuma KANESHIMA
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
ADMIXTURE FOR CEMENT
- Publication number 20240327284
- Publication date Oct 3, 2024
- Sika Technology AG
- Liucheng ZHOU
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE
- Publication number 20240286956
- Publication date Aug 29, 2024
- Saudi Arabian Oil Company
- Simone Musso
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
Dispersion-Based Ready-to-Use (RTU) Technology with Performance of...
- Publication number 20240246859
- Publication date Jul 25, 2024
- LATICRETE INTERNATIONAL, INC.
- Suxin Wang
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS
- Publication number 20240246858
- Publication date Jul 25, 2024
- Sika Technology AG
- Ulf VELTEN
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CERAMIC BINDER COMPOSITION FOR CERAMIC COATED SEPARATOR FOR LITHIUM...
- Publication number 20240243435
- Publication date Jul 18, 2024
- HERCULES LLC
- Alaa ALHARIZAH
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
AQUEOUS ADMIXTURE FOR INORGANIC BINDER COMPOSITION
- Publication number 20240208874
- Publication date Jun 27, 2024
- Sika Technology AG
- Didier LOOTENS
- B33 - ADDITIVE MANUFACTURING TECHNOLOGY
Information Patent Application
CLASS C FLY ASH-BASED CEMENTITIOUS MATERIALS, FLOWABLE FILL, CONCRE...
- Publication number 20240199488
- Publication date Jun 20, 2024
- ECO MATERIAL TECHNOLOGIES IP LLC
- Clinton W. Pike
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS
- Publication number 20230087362
- Publication date Mar 23, 2023
- Sika Technology AG
- Ulf VELTEN
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CLASS C FLY ASH-BASED CEMENTITIOUS MATERIALS, FLOWABLE FILL, CONCRE...
- Publication number 20230090644
- Publication date Mar 23, 2023
- VHSC, LTD.
- Clinton W. Pike
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
POLYELECTROLYTE-LAYER FORMING BLOCK COPOLYMERS AND COMPOSITIONS AND...
- Publication number 20230067163
- Publication date Mar 2, 2023
- ADAMA MAKHTESHIM LTD.
- Gilad Silbert
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
CURABLE COMPOSITION FOR THE MANUFACTURE, BY STEREOLITHOGRAPHY, OF G...
- Publication number 20220332648
- Publication date Oct 20, 2022
- S.A.S 3DCERAM-SINTO
- Christophe CHAPUT
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHOD FOR THE PRESERVATION OF IN-SITU SOLUBLE SALT CEMENTS THAT AL...
- Publication number 20220325602
- Publication date Oct 13, 2022
- Saudi Arabian Oil Company
- Paul Joseph Tarabbia
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE THEREOF
- Publication number 20220242786
- Publication date Aug 4, 2022
- Saudi Arabian Oil Company
- Sivaprakash Shanmugam
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
NOISE REDUCING MORTAR COMPOSITION
- Publication number 20220220034
- Publication date Jul 14, 2022
- Sika Technology AG
- Luigi PERRINO
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
METHOD OF APPLICATION OF SLIDING-RING POLYMERS TO ENHANCE ELASTIC P...
- Publication number 20220169909
- Publication date Jun 2, 2022
- Saudi Arabian Oil Company
- Hasmukh A. Patel
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE
- Publication number 20220144703
- Publication date May 12, 2022
- Saudi Arabian Oil Company
- Simone Musso
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE
- Publication number 20220145159
- Publication date May 12, 2022
- Saudi Arabian Oil Company
- Simone Musso
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Application
CONCRETE VACUUM TUBE SEGMENT FOR HYPER-SPEED TRANSPORTATION SYSTEM...
- Publication number 20220135479
- Publication date May 5, 2022
- KOREA INSTITUTE OF CIVIL ENGINEERING AND BUILDING TECHNOLOGY
- Gum Sung RYU
- B28 - WORKING CEMENT, CLAY, OR STONE
Information Patent Application
FLUID LOSS ADDITIVE FOR LOW-PORTLAND OR NON-PORTLAND CEMENTS
- Publication number 20220081605
- Publication date Mar 17, 2022
- Halliburton Energy Services, Inc.
- William Cecil Pearl
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
MULTIFUNCTIONAL CEMENT HYDRATION HEAT CONTROL MATERIAL AND MANUFACT...
- Publication number 20220073428
- Publication date Mar 10, 2022
- SOBUTE NEW MATERIALS CO., LTD.
- Jiaping LIU
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS
- Publication number 20220033306
- Publication date Feb 3, 2022
- Sika Technology AG
- Ulf VELTEN
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Comb polymers

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Self-repairing cement including microcapsule-in-microcapsule materi...

Method for the manufacture of hydraulic binders from water treatmen...

Industrial fluids with dilution resistance and tunable viscosity, a...

Method for producing photocatalytic mortar

Class C fly ash-based cementitious materials, flowable fill, concre...

Cement additive, cement admixture, cement composition, molded body,...

Compositions comprising an acrylic polymer and processes of prepari...

Method for taking a core sample of a formation

Fluid loss additive for low-Portland or non-Portland cements

Comb polymers as blocking additives for swelling clays

Cement slurries, cured cement and methods of making and use of these

Multifunctional cement hydration heat control material and manufact...

Dispersion-based ready-to-use (RTU) technology with performance of...

Class C fly ash-based cementitious materials, flowable fill, concre...

Construction material without a hydraulic binder

Concrete vacuum tube segment for hyper-speed transportation system...

Self-healing composite of thermoset polymer and programmed super co...

Method of application of sliding-ring polymers to enhance elastic p...

Cement slurries, cured cement and methods of making and use of these

Repair compound and methods of use

Compositions comprising an acrylic polymer and processes of prepari...

Composition containing a semi-ordered calcium silicate hydrate

Suspending agents obtained by micellar polymerization

Dispersant composition

Fluid loss additive for low-Portland or non-Portland cements

Polyelectrolyte-layer forming block copolymers and compositions and...

Preventing or reducing plant growth by biocementation

Water-based gel-consolidation type lost circulation material system...

Method for coring that allows the preservation of in-situ soluble s...

Sequenced polymers for monitoring the filtrate

Patents Applicationslast 30 patents

SOUND-ABSORBING MATERIAL BLOCK, METHOD FOR PREPARING THEREOF, AND E...

CEMENTITIOUS COMPOSITION COMPRISING A POLYMERIC MICRO-GEL AS AN ANT...

SELF-HEATING AND SUSTAINABLE PAVEMENT SYSTEM AND METHOD

ULTRA-HIGH-TOUGHNESS MULTIFUNCTIONAL SELF-ASSEMBLY C-S-H GEL MATERI...

MIKTOARM STAR POLYMER AS CEMENT FLUID ADDITIVES

DUAL-SCALE TOUGHENED CEMENT-BASED COMPOSITE MATERIAL AND USE THEREOF

METHOD FOR TAKING A CORE SAMPLE OF A FORMATION

HIGH DENSITY WASHABLE MINING GROUTING REINFORCEMENT MATERIAL AND PR...

CEMENT COMPOSITION, FLUID LOSS CONTROL AGENT, AND FLUID LOSS CONTRO...

ADMIXTURE FOR CEMENT

CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE

Dispersion-Based Ready-to-Use (RTU) Technology with Performance of...

COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS

CERAMIC BINDER COMPOSITION FOR CERAMIC COATED SEPARATOR FOR LITHIUM...

AQUEOUS ADMIXTURE FOR INORGANIC BINDER COMPOSITION

CLASS C FLY ASH-BASED CEMENTITIOUS MATERIALS, FLOWABLE FILL, CONCRE...

COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS

CLASS C FLY ASH-BASED CEMENTITIOUS MATERIALS, FLOWABLE FILL, CONCRE...

POLYELECTROLYTE-LAYER FORMING BLOCK COPOLYMERS AND COMPOSITIONS AND...

CURABLE COMPOSITION FOR THE MANUFACTURE, BY STEREOLITHOGRAPHY, OF G...

METHOD FOR THE PRESERVATION OF IN-SITU SOLUBLE SALT CEMENTS THAT AL...

CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE THEREOF

NOISE REDUCING MORTAR COMPOSITION

METHOD OF APPLICATION OF SLIDING-RING POLYMERS TO ENHANCE ELASTIC P...

CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE

CEMENT SLURRIES, CURED CEMENT AND METHODS OF MAKING AND USE OF THESE

CONCRETE VACUUM TUBE SEGMENT FOR HYPER-SPEED TRANSPORTATION SYSTEM...

FLUID LOSS ADDITIVE FOR LOW-PORTLAND OR NON-PORTLAND CEMENTS

MULTIFUNCTIONAL CEMENT HYDRATION HEAT CONTROL MATERIAL AND MANUFACT...

COMB POLYMERS AS BLOCKING ADDITIVES FOR SWELLING CLAYS