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Silicone polymerisates

A polymer, silicone technology, applied in the direction of graft polymer adhesives, adhesive types, hair care, etc., can solve the problems of large polymers, insoluble components of undesired gel particles, non-uniformity, etc.

Inactive Publication Date: 2006-09-06
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of the silicone-modified emulsion polymers described in the prior art are that they are highly susceptible to hydrolysis and undergo uncontrolled crosslinking, which in some applications is suitable and which can subsequently be obtained by adding Silanes and catalysts strengthen, but when used in coating dispersions or coating compositions, the crosslinking can lead to undesirable gel particles ("spots") and insoluble components
As a result, the hydrophobicity and related properties of the presently described systems deteriorate considerably over a longer period of time
Finally, incorporation of large amounts of silane or polysiloxane into the emulsion polymer will result in poor particle size distribution, i.e. the particles become too large and the polymer becomes inhomogeneous, leading to slurry formation or phase separation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 4

[0118] (Copolymer like Comparative Example 25, with component b))

[0119] 2.60 kg of water, 298.04 g of W 25 / 140 (polyvinyl alcohol; 10% strength solution), 212.88 kg of Genapol X 150 (40% strength in water), 157.9 g of Mersolat (30% strength in water), 68.12 g of vinylsulfonic acid Sodium (25% concentration), 851.53 grams of vinyl acetate, 170.31 grams of PDMS mixture and 851.53 grams of VeoVa 10 were placed in a 19 liter autoclave. The acidity value was adjusted to 5 with the aid of 10% strength formic acid. In addition, 9.7 ml of Trilon B (ethylenediaminetetraacetic acid; 2% strength in water) and 30.6 ml of ferric ammonium sulfate (1% strength in water) were added. The autoclave was heated to 70°C and pressurized with 14 bar of ethylene. When the reactor reached thermal equilibrium, 68 g / h of a 5.41% strength ammonium peroxosulfate solution (APS solution) and 85 g / h of a 4.16% strength sodium sulfite solution were immediately fed. After 25 minutes, a feed consi...

Embodiment 5

[0125] (similar to Example 4, without Mersolat)

[0126] 2.16 kg of water, 955.94 g of W 25 / 140 (polyvinyl alcohol; 10% strength solution), 84.60 g of component b), 156.87 g of Mersolat (30% strength in water), 67.68 g of sodium vinylsulfonate (25% strength) , 845.96 grams of vinyl acetate, 169.19 grams of PDMS mixture and 845.96 grams of VeoVa 10 were placed in a 19 liter autoclave. The acidity value was adjusted to 5 with the aid of 10% strength formic acid. In addition, 9.7 ml of Trilon B (ethylenediaminetetraacetic acid; 2% strength in water) and 30.6 ml of ferric ammonium sulfate (1% strength in water) were added. The autoclave was heated to 70°C and pressurized with 14 bar of ethylene. When the reactor reached thermal equilibrium, 68 g / h of a 5.41% strength ammonium peroxosulfate solution (APS solution) and 85 g / h of a 4.16% strength sodium sulfite solution were immediately fed. After 25 minutes, a feed consisting of 5.75 kg of vinyl acetate, 820.58 g of V...

Embodiment 6

[0132] The steps of Example 5 were repeated without adding polyvinyl alcohol.

[0133] Dispersion Analysis Results: See Table 1.

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Abstract

The invention relates to silicone polymerisates produced by radical polymerisation of ethylenically non-saturated monomers in the presence of polysiloxane. The inventive polymerisates are characterised in polymerisation of a) 60-99.99 mass % one or several monomers of a group comprising vinyl esters of linear or branched alkylcarboxylic acids having 1-15 C atoms, alcohol methacrylates and acrylates having 1-15 C atoms, aromatic vinyl compounds, olefins, dienes and vinyl halides in the presence of b) 0.01-40 mass % at least one type of branched polysiloxane whose lipophilic siloxane part contains branched structures and whose hydrophilic polymer organic part can be linear or branched, the mass percentage values relate to the total mass of a) and b).

Description

technical field [0001] The present invention relates to siloxane-containing polymers, their production methods and uses. Background technique [0002] Organosilicon compounds (for example: organosiloxane polymers) are used to hydrophobize polymers formed from ethylenically unsaturated monomers. These hydrophobically modified polymers (in the form of their polymer powders, especially water-redispersible polymer powders, or aqueous polymer dispersions) find many applications. These polymers are used as binders or binders in coating compositions, especially in the construction and textile industries, and as binders in cosmetic and hair care products. [0003] It is known from WO-A 95 / 20626 that water-redispersible polymer powders can be modified by adding non-copolymerizable organosilicon compounds. European patent EP-A 0352339 describes protective coatings for concrete buildings, including: divinylpolydimethylsiloxane copolymers with acrylates or methacry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F290/14C08L51/08C09D151/08C09J151/08C08F2/00A61K8/89A61Q5/12
CPCC09D151/085C08L51/085C08F290/14C08F283/12C09J151/085
Inventor 库尔特·施塔克克里斯蒂安·赫尔齐希克里斯蒂安·赫格尔
Owner WACKER CHEM GMBH
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