Process for producing water-redispersible polymer powder compositions with cationic functionality
A technology for redispersing polymers and cations, applied in the field of water redispersible polymer powder compositions, can solve problems such as mechanical strength enhancement
Active Publication Date: 2017-09-01
WACKER CHEM GMBH
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- Abstract
- Description
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- Application Information
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Problems solved by technology
However, the mechanical strength of the mortar compounds thus obtained still needs to be enhanced
Method used
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Embodiment 1 to 6
[0066] According to the amounts indicated in Table 1 (dry weight), the initial dispersions A to C were mixed with protective colloids PC1 to PC3, respectively, and 0.3 wt. Silfoam S860), and the resulting mixture was stirred for 30 minutes and filtered. Condensation did not form in any of Examples 1 to 6. The mixture was spray dried with the addition of 15% by weight based on the solids fraction of the dispersion of an anti-blocking agent (calcium carbonate, Omyacarb 5GU).
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Abstract
The present invention provides a process for the production of water-redispersible polymer powder compositions having cationic functionality, wherein one or more ethylenic polymers are free-radically polymerized in an aqueous medium in the presence of protective colloids and / or emulsifiers. unsaturated monomers, and drying the resulting aqueous polymer dispersion after addition of a cationic protective colloid as a drying aid, characterized in that a homogeneous mixture of one or more cationic monomers with quaternary ammonium halide groups is used A polymer or copolymer as cationic protective colloid, wherein 50% by weight to 100% by weight of the halide ions in the quaternary ammonium halide groups are exchanged by non-halogen anions, based on the total weight of the polymer powder composition, and The fraction of halide ions is less than 1% by weight.
Description
technical field [0001] The present invention relates to a process for the production of water-redispersible polymer powder compositions with cationic functionality (cationic functionality, cationic functionality), to water-redispersible polymers with cationic functionality obtainable by this process Compositions of food powders, and uses thereof. Background technique [0002] Water-redispersible polymer powders (dispersion powders) are generally polymer powders obtained by drying corresponding aqueous polymer dispersions in the presence of drying aids, usually protective colloids. One function of the protective colloid portion is to prevent the polymer particles from undergoing irreversible bonding during the drying operation, due to the encapsulation of the polymer particles by the water-soluble particles of the protective colloid. When the polymer powder is dispersed in water, a secondary effect of the redissolved protective colloid matrix is that, in the aqueous redisp...
Claims
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IPC IPC(8): C08F2/20C04B24/26C08F8/26C08F218/08
CPCC08F2/20C08F218/08C04B28/04C04B40/0042C04B2103/0054C04B2111/00508C04B2111/00637C04B2111/00672C04B2111/27C04B2111/60C04B2111/62C08F8/26C04B24/2623C08F218/04C08F210/02C08F218/12C04B14/06C04B24/383C04B24/2688C04B24/26C04B24/2652C04B2103/0063C04B2111/70
Inventor 杰茜卡·塞德尔
Owner WACKER CHEM GMBH