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Working property improved dry gatch

A dry ash, sticky technology, applied in the direction of inorganic adhesives, adhesives, etc., can solve the problems of material blocking machinery, water resistance reduction, etc.

Inactive Publication Date: 2006-04-19
WACKER POLYMER SYST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage implied by this fact is that such plasters can no longer be used if they are not processed immediately, but must be disposed of; especially when processing viscous compounds with machinery, the short pot life can lead to premature curing of the material in the machine thus blocking the mechanism
Although cementitious composites remain workable with such retarders, they have the disadvantage that the water resistance after hardening is greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention is illustrated by the following examples:

[0043] Performance testing was performed using the following recipes:

[0044] 24.4 parts by weight white cement (CEM I 52.5R) (a)

[0045] 34.7 parts by weight calcium carbonate (Omyacarb 40-GU) (b)

[0046] 33.6 parts by weight calcium carbonate (Omyacarb 130-BG)(b)

[0047] 97.7 parts by weight of quartz sand (HR 81T) (b)

[0048] 0.3 parts by weight of cellulose ether (Walocel MKX 25000 PF 25L) (c)

[0049] 8.0 parts by weight of redispersible powder (d)

[0050] 0.3 parts by weight zinc oxide (f)

[0051] 1.0 parts by weight calcium hydroxide (f)

[0052] The above dry mixes were always stirred into 24% by weight of water (based on the total weight of the dry mix).

[0053] hardening:

[0054] To evaluate the hardening effect, the plaster was placed in a 100 ml plastic beaker with a lid. They were stored at room temperature for 1 or 2 days respectively, after which they were tested to see if...

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Abstract

The invention provides cementitious dry mortars comprising a) from 0.5 to 80% by weight of cement, b) from 0 to 97% by weight of fillers, c) from 0 to 3.5% by weight of thickeners, wherein a polymer powder composition is present, with d) from 1.0 to 80% by weight of redispersible polymer powder, e) from 0.02 to 4.0% by weight of one or more compounds from the group consisting of zinc oxide, zinc hydroxide, and zinc hydroxide carbonate, f) from 0 to 30% by weight of alkali metal hydroxide and / or alkaline earth metal hydroxide, based in each case on the overall weight of the dry mortar, the percentages by weight adding up to 100% by weight.

Description

technical field [0001] The present invention relates to cohesive dry plasters modified with polymer powder compositions and their use as binders and coatings. Background technique [0002] The prior art has disclosed mixtures of cement and polymer powders redispersible in water. Among them, the added redispersible powder is used as an organic binder to improve the adhesion to the substrate and the flexibility of the coating. Other ingredients in such blends include fillers and thickeners to control rheology. Common additives also include dispersants, cement plasticizers and additives to accelerate or delay cement hardening. In German Patent DE-A 19511171 an example of a stucco base material mixture has been disclosed. [0003] The mixture is prepared by mixing with water and can then be used in construction adhesives, troweling compositions, reinforced stucco for exterior insulation and finishing systems and as a binder for bonding essential flooring materials. Depending...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B22/06C04B28/04C04B28/02C09J1/00
CPCC09J1/00C04B22/06C04B28/02C04B2111/00637C04B22/062C04B24/26C04B40/0608C04B2103/44C04B22/10C04B2103/002
Inventor 弗朗兹·约德尔鲍尔费利克斯·阿森曼弗雷德·库格尔
Owner WACKER POLYMER SYST