Cement-based plasters using water rentention agents prepared from raw cotton linters

A technology for stucco, mortar, applied in the direction of supporting elements of blades, machines/engines, solid waste management, etc., able to solve the problems of strong labor, insufficient hydration, low-grade cement, etc.

Inactive Publication Date: 2007-04-11
HERCULES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consequently, application of these mortars is labor intensive, especially in hot climates during the summer months, due to rapid eva

Method used

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  • Cement-based plasters using water rentention agents prepared from raw cotton linters
  • Cement-based plasters using water rentention agents prepared from raw cotton linters
  • Cement-based plasters using water rentention agents prepared from raw cotton linters

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Examples 1 and 2 show some chemical and physical properties of the polymers of the present invention relative to similar commercially available polymers.

[0047] confirmation of replacement

[0048] Modified Zeisel ether cleavage of cellulose ethers with hydroiodic acid at 150 °C. The volatile reaction products formed were determined quantitatively by gas chromatography.

[0049] determination of viscosity

[0050] The viscosities of the aqueous cellulose ether solutions were determined for solutions with concentrations of 1% by weight and 2% by weight. When the viscosity of the cellulose ether solution is determined, the corresponding methylhydroxyalkylcellulose is used on a dry basis, ie the moisture percentage is compensated by a higher amount by weight. Currently available commercially available methyl hydroxyalkyl cellulose based on purified cotton linters or high viscosity wood pulp has a maximum of approximately 70,000-80,000 mPas (using a Brookfield RVT visc...

Embodiment 2

[0062] confirmation of replacement

[0063] Modified Zeisel ether cleavage of cellulose ethers with hydroiodic acid at 150 °C. The volatile reaction products formed were determined quantitatively by gas chromatography.

[0064] determination of viscosity

[0065]The viscosity of the aqueous cellulose ether solution is determined for a solution having a concentration of 1% by weight. When determining the viscosity of the cellulose ether solution, the corresponding hydroxyethyl cellulose was used on a dry basis, ie the moisture percentage was compensated by the higher amount by weight.

[0066] To determine the viscosity, a Brookfield LVF rotational viscometer was used. All measurements are made at 25°C and 30 rpm, using propeller No. 4.

[0067] Hydroxyethylcellulose was prepared from purified raw cotton linters in a Hercules' pilot plant reactor. As shown in Table 2, both samples had about the same hydroxyethoxy content. But the viscosity of the formed RCL-based HEC was ...

Embodiment 3

[0070] All tests were performed on a mixture of 14.00% by weight Portland cement CEM I 42.5R, 4.0% by weight slaked lime, 39.0% by weight quartz sand with a particle size of 0.1-0.4mm and 43.0% by weight quartz Sand constitutes a stucco-based coating base mix.

[0071] Water retention

[0072] Water retention is determined according to DIN EN 18555 or internal Hercules / Aqualon operating procedures.

[0073] Hercules / Aqualon Runner

[0074] Within 5 seconds, 300 g of dry mortar were added to a corresponding amount of water (at 20° C.). After mixing the sample for 25 seconds using a Kitchen hand mixer, the resulting sample was allowed to age for 5 minutes. The mortar was then filled into a plastic ring placed on a piece of filter paper. Between the filter paper and the plastic ring, place a piece of fiber wool while placing the filter paper on the plastic dish. The weight of the equipment was measured before and after filling the mortar. From this the weight of the wet mor...

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Abstract

A mixture composition of a cellulose ether made from raw cotton linters and at least one additive is used in a cement extrusion mortar composition wherein the amount of the cellulose ether in the cement extrusion mortar composition is significantly reduced. When this cement extrusion mortar composition is mixed with a sufficient amount of water and extruded to form an object with comparable or lower crack formation, the plastification and/or extrusion properties of the resulting wet mortar are improved or comparable as compared to when using conventional similar cellulose ethers.

Description

[0001] This application claims the benefit of US Provisional Application No. 60 / 565,643, filed April 27,2004. technical field [0002] The present invention relates to mixes for use in dry cement-based stucco (or render) compositions for plastering walls. More specifically, the present invention relates to dry cement-based stuccoes (or renders) using improved water-retaining agents made from raw cotton linters. Background technique [0003] Traditional cement-based stucco is usually a simple mixture of cement and sand. This dry mixture is mixed with water to form a mortar. These traditional mortars themselves have poor fluidity or troweling properties. Consequently, application of these mortars is labor intensive, especially in hot climates during the summer months, due to rapid evaporation or removal of water from the mortar, resulting in poor or poor workability of the cement and insufficient water cooperation. [0004] The physical properties of a hardened conventiona...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B28/02B63H3/00B64C11/26C04B7/00C04B12/04C04B14/00C04B24/10C04B26/02C04B28/14C04B28/26C04B40/00C04B40/06F01D5/28
CPCC04B2111/00672C04B2111/56C04B2201/10B63H3/008C04B26/02C04B2111/00129C04B2111/00637C04B2103/0057C04B24/383C04B2103/0099C04B2111/00094C04B28/02C04B2111/34C04B2111/00646C04B40/0039C04B2111/00482C04B40/0608C04B28/14Y02W30/91C04B20/002C04B24/2652C04B24/38C04B24/168C04B2103/44C04B2103/00C04B2103/46C04B14/10C04B14/18C04B14/20C04B14/28C04B14/365C04B18/24C04B20/0048C04B24/10C04B24/223C04B24/226C04B24/2623C04B24/2647C04B24/32C04B2103/0086C04B2103/10C04B2103/20C04B2103/304C04B2103/50C04B2103/30C04B2103/40C04B24/04C04B24/22C04B18/08C04B24/24C04B24/28
Inventor 维尔弗里德·霍恩迪特尔·施维策尔
Owner HERCULES INC
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