Nanoparticulate silicone organo copolymers and use thereof in coating means
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A nanoparticle, silicone technology, applied in coating, transportation and packaging, thin material handling, etc., can solve problems such as coating is not
Inactive Publication Date: 2011-04-20
WACKER CHEM GMBH
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However, the coatings obtainable therefrom are still not sufficiently wettable with water
Method used
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Embodiment 1
[0080] Example 1: Polymer 1:
[0081] A 100-liter reaction vessel equipped with jacket cooling, evaporative cooling and anchor stirrer was charged with 6560 g of water and 1 g of Fe(II)-EDTA complex. The device was made inert by evacuating twice and breaking the vacuum with nitrogen.
[0082] In the second vessel, dissolve methacrylic acid, water, and sodium lauryl sulfate in the amounts indicated in feed 1 below (aqueous phase).
[0083] In the third container, the remaining components of feed 1 were uniformly dissolved in the indicated amount (oil phase).
[0084] Then, with sufficient stirring, the oil phase is introduced into the vessel containing the water phase. The resulting coarse emulsion was homogenized in one pass using a high-pressure homogenizer from IKA at a pressure of 800 bar. This obtains a preliminary emulsion containing all the components of feed 1. The preliminary emulsion was stirred at room temperature in a stirring vessel (primary emulsion container). In a s...
Embodiment 2
[0105] Example 2: Polymer 2:
[0106] Polymer 2 was prepared in the same manner as in Example 1, except that the composition of feed 1 was as follows:
[0107] Feed 1 (all values are in grams):
[0108] Hexadecane 131.2
[0109] Butyl acrylate 7216
[0110] MMA 7872
[0111] Butyl methacrylate 2296
[0112] Methacrylic acid 360.8
[0113] Sodium lauryl sulfate 492
[0114] Linear monomethacrylate methyl-functional
[0115] PDMS (number average molar mass: 1200g / mol) 918.4
[0116] Particles 1 918.4
[0117] Steamed water 9840
[0118] Polymer 3:
[0119] Polymer 3 was prepared in the same manner as in Example 1, except that the composition of feed 1 was as follows:
[0120] Feed 1 (all values are in grams):
[0121] Hexadecane 131.2
[0122] Butyl acrylate 7216
[0123] MMA 6560
[0124] Butyl methacrylate 2296
[0125] Styrene 1312
[0126] Methacrylic acid 360.8
[0127] Sodium lauryl sulfate 492
[0128] Particle 1 1837
[0129] Steamed water 9840
[0130] Polymer 4:
[0131] Polymer 4 was prepared i...
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Abstract
The object of the invention is nanoparticulate silicone organo copolymers in the form of aqueous polymer dispersions thereof or polymer powders that can be redispersed in water, whereupon the polymer dispersion obtained can optionally dried, said copolymers being obtainable through the radically-initiated polymerization, in an aqueous medium, of A) one or more monomers selected from the group consisting of vinyl esters, (meth)acrylic acid esters, vinyl aromatics, olefins, 1,3- dienes, vinyl ethers and vinyl halogenides and optionally other monomers copolymerizable therewith in the presence of B) at least one particle P having an average diameter of < 1000 nm and being functionalized with ethylenically unsaturated, radically polymerizable groups, wherein Bl) particles P can be selected from one or more members of the group of metal oxides and semimetal oxides, and / or B2 ) silicone resins of the general formula [R4 (p+z) SiO(4-.p-z) / 2] m (II) can be used as particles P, wherein the individual radicals R4 can be hydrogen, hydroxy, alkyl, cycloalkyl, aryl, alkoxy or aryloxy radicals independent of one another, each of said radicals having up to 18 C atoms and being optionally substituted, where m stands for a whole number = 30, and where p + z = 0, 1 or 3 for at least 20 mol-% of the respective silicone resin, said silicone organo copolymers being characterized in that C) one or more linear polydiorganosiloxanes of the general formula R93Si0- [R82Si02 / 2] n-SiR9 3 (III) are copolymerized.
Description
Technical field [0001] The present invention relates to nanoparticulate silicone organo copolymers in their aqueous dispersion form or water redispersible powder form, methods for preparing them, and their use in coating compositions, more specifically , Used to produce thermal insulation composite system. Background technique [0002] The Thermal Insulation Composite System (TICS) is extremely important in the insulation of buildings, especially the external walls of buildings. For example, TICS usually includes a thermal insulation material (insulating material), a plaster layer, and a coating of a coating composition, such as a lacquer coating. Common insulation materials are glass wool or polystyrene-based panels. Examples of TICS substrates are brick, lime sandstone or concrete. A layer of gypsum, usually based on plaster, can be applied (coated) to the insulating material. As an additional layer, usually the uppermost layer, TICS contains a coating composition coating. ...
Claims
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Application Information
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