hydraulic binder composition

A kind of technology of hydraulic binder and dry composition, applied in the field of hydraulic binder composition, can solve problems such as expensive

Inactive Publication Date: 2016-10-19
LAMBERTI SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] These products (and among these products especially cellulose ethers) are highly purified products, the preparation of which requires many delicate and complex purification steps
they are quite expensive products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] Preparation of water retaining agent

[0077] Preparation of 2-Hydroxypropylgalactomannan with an average ratio of D-mannose to D-galactose units of about 1:1

[0078] In a 5 liter stirred reactor, 600 g of fenugreek gum was loaded at room temperature, the reactor was purged with nitrogen and a solution of 21 g NaOH in 175 g of water was added under vigorous stirring. Stirring was continued for 15 minutes at room temperature.

[0079] After purging again with nitrogen, 410 g of propylene oxide was added while stirring at 65-70° C. for 6 hours.

[0080] The reaction mixture was cooled to 40°C and the pH was neutralized to about 5-6.5 by adding acetic acid.

[0081] The reaction mixture thus obtained was dried with hot air in a fluidized bed dryer to a moisture content of approximately 3% by weight, then ground and analyzed.

[0082] The resulting product (HPF H ) MS HP = 1.5.

[0083]Preparation of 2-Hydroxypropyl-2-Hydroxy-3-(2-Ethylhexyloxy)propylgalactomannan Ha...

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Abstract

Dry composition comprising a hydraulic binder, such as cement or gypsum, and a highly substituted C2-C4 hydroxyalkylgalactose having an average ratio of D-mannose to D-galactose units different from 2:1 Mannan, the dry composition provides a paste with good water retention properties and processability.

Description

technical field [0001] The present invention relates to a dry composition comprising a hydraulic binder such as cement or gypsum and a water-retaining agent of a high degree having an average ratio of D-mannose to D-galactose units different from 2:1 Replaced C 2 -C 4 Hydroxyalkylgalactomannans, which preferably contain linear or branched C 6 -C 22 Alkyl chain. technical background [0002] In the field of construction, it is well known to use hydraulically setting adhesive compositions for the manufacture of basic structures (such as paving blocks or boards and tiles) of buildings, works of art, apartment buildings or articles, and as adhesives or jointing compositions , especially commonly used to adhere tiles or ceramics vertically or horizontally to various surfaces such as concrete, plywood or brick surfaces. [0003] As used herein, the term "hydraulic binder" is defined as a mineral that hardens due to a chemical reaction of hydration in the presence of water and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08B37/00C04B24/38C04B28/04C04B28/14
CPCC04B24/38C04B28/04C04B28/145C04B2111/00637C04B2111/00672C08B37/0087C08B37/0093C04B2103/46C04B2111/00482C04B2111/62C04B40/0608
Inventor B·比亚索蒂M·朱迪奇U·普法伊弗V·朗吉拉R·科瑞扎G·弗罗瑞迪G·利 巴锡
Owner LAMBERTI SPA
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