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Compositions containing phosphonate-functional particles

A technology of composition and particles, applied in coatings, adhesives, filling slurries, etc., which can solve the problems of not achieving the best results and limited choices

Inactive Publication Date: 2009-09-02
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in particular, the choice of fully possible organofunctional groups for this system is relatively limited
Optimum results have therefore not yet been achieved for this system, but also for all other prior art systems

Method used

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  • Compositions containing phosphonate-functional particles
  • Compositions containing phosphonate-functional particles
  • Compositions containing phosphonate-functional particles

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0108] In the case of another preferred method of preparing particles (P), said particles (P) are prepared via cohydrolysis of organosilanes (S) with other silanes (S4) or compounds (L). It is possible here to use all hydrolyzable silanes and silanes containing hydroxysilyl groups as silanes (S4). Siloxanes or silazanes may also be used. Typical examples of suitable silanes (S4) are tetraethoxysilane, tetramethoxysilane, methyltrimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane, phenyltriethoxysilane Silane, Dimethyldimethoxysilane, Dimethyldiethoxysilane, Trimethylmethoxysilane or Trimethylethoxysilane. It is of course also possible to use different mixtures of different silanes (S4). It is thus not only possible to use mixtures containing only silanes (S4) without further organofunctional groups in addition to silane (S), but also silanes (S4) which contain no further organofunctional groups in addition to silane (S) and Silanes (S4) with additional organofunc...

Embodiment 1

[0137] Example 1: Synthesis of Phosphonate Functionalized Particles from Silica Hydrosol.

[0138] A solution of 1.96 g of diethylphosphonomethyldimethylmethoxysilane in 40 mL of methoxypropyl acetate was added dropwise to 14.0 g of silica water over the course of 10 minutes under vigorous stirring. Sol (from GRACE DAVISON's AS 40, 24 nm, 40% by weight), the mixture was heated at 60° C. for 4 hours. The resulting milky white emulsion was then concentrated under reduced pressure until a transparent silica sol was obtained. The average particle size of the modified silica sol measured by dynamic light scattering (Zetasizer Nano from Malvem) was 32 nm. After distilling off the solvent, 7.16 g of a colorless solid are obtained, which are redispersed in isopropanol by stirring incorporation. The average particle size of the silica sol in isopropanol was 44 nm.

Embodiment 2

[0139] Example 2: Synthesis of phosphonate functionalized particles from silica organosols.

[0140] A mixture of 480 g of silica sol in isopropanol (IPA-ST from NISSAN CHEMICAL, 12 nm, 30% by weight) and 48.0 g of diethylphosphonomethyldimethylmethoxysilane was prepared in Heat at 60°C for 6 hours. The average particle size of the modified silica sol measured by dynamic light scattering (Zetasizer Nano from Malvem) was 13 nm. After distillative removal of the solvent, 191 g of a colorless solid are obtained, which are redispersed in acetone and isopropanol by stirring incorporation. The silica sol in isopropanol had an average particle size of 14.5 nm.

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Abstract

The invention relates to a composition (Z) which contains (a) 0.02-200 parts by weight of particles (P) having at least one structural element of general formula =Si-L-P(O)(OR)2, (b) 100 parts by weight of a binder (B), (c) 0-100 parts by weight of a curing agent (H) which is reactive to the binder (B), and (d) 0-1000 parts by weigh of a solvent or a solvent mixture, L being a bivalent aliphatic or aromatic hydrocarbon group with 1 to 12 hydrocarbon atoms as defined in claim 1 and Rand R being defined as in claim 1. The invention also relates to composite materials (K) that can be produced from the composition and to the use thereof.

Description

technical field [0001] The present invention relates to compositions comprising phosphonate-functionalized particles and composites made therefrom, as well as uses of the compositions. Background technique [0002] Composite materials comprising particles, more particularly nanoparticles, are prior art. Corresponding coatings comprising composite materials are described, for example, in EP 1 249 470, WO 03 / 16370, US20030194550 or US 20030162015. The particles therein lead to an improvement of the properties of the corresponding coating, more particularly with regard to the scratch resistance of the coating and, where appropriate, the chemical resistance of the coating. [0003] A frequently occurring problem associated with the use of generally inorganic particles in organic matrices is the often insufficient compatibility between the particles and the matrix. This leads to insufficient dispersion of the particles in the matrix. Moreover, even well-dispersed particles may...

Claims

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Application Information

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IPC IPC(8): C08K9/06C09D7/12C09J11/00C08K3/30C08K5/5419C08L63/00C08L75/00C09D7/62
CPCC08K3/36C09D5/34C09D7/1225C08K9/04C08G77/30C08K5/5419C09D183/08C09D7/62C08K7/16C08K9/06
Inventor C·布里恩V·施坦耶克M·鲍曼S·容-罗塞蒂
Owner WACKER CHEM GMBH
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