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Aqueous hybrid binder for jointing mortars

A water-based polymer and mortar technology, which is applied in the field of copolymers of ethylenically unsaturated monomers and ethylenically functionalized nanoparticles, can solve the problem that stable C-C bonds are not obtained, and the combination of polymers and nanoparticles is unsatisfactory. And other issues

Inactive Publication Date: 2012-07-18
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0019] So far, the conjugation of polymers to nanoparticles has been unsatisfactory because stable C-C bonds have not been obtained

Method used

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  • Aqueous hybrid binder for jointing mortars
  • Aqueous hybrid binder for jointing mortars
  • Aqueous hybrid binder for jointing mortars

Examples

Experimental program
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preparation example Construction

[0087] This detailed description of possible preparation ingredients and auxiliaries is to be understood not as limiting but as illustrative and to be supplemented by the prior art.

[0088] The nanoparticle-containing organic copolymer dispersion according to the invention is added in a suitable manner during the operation for the preparation of joint mortar preparations and is homogeneously combined with the other preparation components, using the operations and procedures of the prior art in relation thereto .

[0089] The joint mortar comprises preferably 1% to 90% by weight, more preferably 4% to 70% by weight, of the nanoparticle-containing organic copolymer dispersion.

[0090] Here, the fractional % by weight is in each case based on the total weight of the building coating composition.

Embodiment I

[0092] Example 1 Synthesis of Nanoparticle-Containing Copolymer Dispersions of the Present Invention

[0093] (10% by weight of Particle 2, MMA (methyl methacrylate) / n-butyl acrylate 1 / 1):

[0094]

[0095] Solid content: 50.8%, pH: 8.1; Brookfield viscosity 48: 0.103Pas; glass transition temperature T g : 54°C; (Nanosizer) Coulter: average particle size: 285nm; PDI (polydispersity index): 1.2; surface area 22.43m 2 / g; polymer film formation: after drying by evaporating water: no streaks and no tacky film, no exudation of silicone (siloxane). TEM micrograph: Si particle crystal domains are in the range of 50-700nm.

Embodiment 1

[0096] Embodiment 1: the preparation of joint mortar of the present invention

[0097] Use the following ingredients in the amounts stated:

[0098] 625 g of the copolymer dispersion from Example 1

[0099] 1.67g SD 860 defoamer, a colorless, turbid silicone defoamer based on aliphatic and naphthenic hydrocarbons added with organofunctional silicones and hydrophobic pyrogenic silica 1875 g of HR81T quartz sand, particle size Quartz sand of 0.16-0.60mm is prepared according to DIN EN 12808-2, 12808-3, and 12808-5:

[0100] - Place the copolymer dispersion in the tank

[0101] -Add to SD 860 defoamer

[0102] -Add HR81T quartz sand

[0103] - Mix for 30 seconds

[0104] -Remove mixing paddle

[0105] -Scrapes from paddles and grooves in 1 minute

[0106] - Change the paddle and mix for 1 minute

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Abstract

The present invention relates to jointing mortars and a process for preparing the same. A process for preparing jointing mortar includes using copolymers of ethylenically unsaturated monomers and of ethylenically functionalized nanoparticles in the form of their aqueous polymer dispersions or water-redispersible polymer powders. The copolymers are obtained by means of free-radically initiated polymerization in aqueous medium, and optionally subsequent drying of the resultant polymer dispersion, of A) one or more unsaturated monomers in the presence of B) at least one particle P having an average diameter of less than or equal to 1000 nm and functionalized with ethylenically unsaturated, free-radically polymerizable groups, where B1) one or more particles from the group of the metal oxides and semimetal oxides are used as particles P, and / or B2) silicone resins are used as particles P, said resins being composed of repeating units of the general formula [R<4>(p+z)SIO(4-p-z) / 2] (II).

Description

technical field [0001] The present invention relates to the use of copolymers of ethylenically unsaturated monomers and ethylenically functionalized nanoparticles in the form of aqueous dispersions of their water-redispersible powders. Background technique [0002] In the building and construction sector, it is a long-established prior art to cover surfaces with planar or non-planar elements made of ceramic, stone, concrete or other materials, these elements being commonly called tiles (tiles). [0003] Always install these tiles so that there are gaps between them that are subsequently filled. These gaps (voids) are filled with jointing mortars (jointing mortars) grout. These joint mortars are often cement mixtures that bind water and are introduced into the tile gaps. In addition to cement, synthetic resins, such as epoxy resins, are also employed and may have technical advantages over cementitious systems. Cementitious systems are penetrable and readily wettable and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/04C08F292/00C08F290/00C08F220/14C08F220/18C08F220/06
CPCC04B2111/00672C08G77/70C08F2/44C08L43/00C04B2111/00008C08F230/08C08L83/04C08G77/04C04B26/06C04B2111/2076C08F2/22C08F2/38C08F230/04C04B26/32C08F220/14C08L43/04C08F220/18B82Y30/00C08F220/1804C04B14/06C04B14/066C04B20/0076C04B20/008C04B24/42C04B26/10C08F20/10C08K9/06C08L33/04
Inventor 弗兰克·桑德梅依尔多米尼克·奥尔
Owner WACKER CHEM GMBH