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Top coat having improved adhesive and soil resistance

A polyorganosiloxane and polyester technology, which is applied in the fields of sheet-like formations or elastomers, compositions and molded bodies, can solve the problems of poor adhesion of polysiloxane substrates and the like

Inactive Publication Date: 2007-12-12
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] EP 718 355 A discloses compositions composed of polyorganosiloxane components, which compositions already have improved antifouling properties compared with the known prior art at the date of their filing, however coatings composed of such compositions Poor adhesion to silicone substrates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 2

[0156] Unless otherwise stated, the following Examples 1 to 2 were used to make the polysiloxane particles:

[0157] a) All quantities are based on weight;

[0158] b) all pressures are 0.10 MPa (absolute); and

[0159] c) All temperatures are at 20°C.

[0160] Light Scattering:

[0161] Devices for measuring static and dynamic light scattering including, among others, Spectra-Physics' Stabilite TM 2060-11s Kr laser, ALV's Sp-86 goniometer, and ALV-3000 digital structurer / correlator. The krypton ion laser operates at a wavelength of 647.1 nanometers.

[0162] Preparation of Specimen: Millex by Millipore TM - FGS type filter (0.2 micron pore size) The sample (organopolysiloxane particles in toluene; concentration ranges are given in the examples) was filtered three times. The measurement temperature in the light scattering experiment was 20°C. Dynamic light scattering was measured from 50° to 130° in steps of 20°; the correlation function was obtained using the Simplex ...

Embodiment 1

[0164] Under stirring, 25.0 grams of methyltrimethoxysilane are metered into the initial batch consisting of 125 grams of water, 3 grams of benzethonium chloride and 0.3 grams of sodium hydroxide solution (in water, the concentration is 10%). 45 minutes. After a further 5 hours of stirring, 1.2 g of trimethylmethoxysilane were added to 25 g of the resulting suspension with stirring, and stirring was continued for 10 hours. The suspension was broken by adding 50 ml of methanol. The precipitated solid matter was filtered off, washed three times with 30 ml of methanol, and placed in 50 ml of toluene. After adding 1.6 g of hexamethyldisilazane and stirring for 10 hours, the product was precipitated with 150 ml of methanol, filtered off and dried in high vacuum. The relative composition of making 1.2 grams is [(CH 3 ) 3 SiO 1 / 2 ] 1.38 [CH 3 SiO 3 / 2 ] 1.0 of white powder. Hydrodynamic particle radius R measured by static and dynamic light scattering (solvent: toluene; conc...

Embodiment 2

[0166] A mixture of 13.3 g of methyltrimethoxysilane and 11.7 g of dimethyldimethoxysilane was metered into 125 g of water, 3 g of benzethonium chloride and 0.3 g of sodium hydroxide solution (in water) under stirring. , the concentration is 10%) in the initial batching of composition, lasted 1 hour. After a further 10 hours of stirring, 1.2 g of trimethylmethoxysilane were added to 25 g of the resulting suspension with stirring, and stirring was continued for 10 hours. The suspension was broken by adding 50 ml of methanol. The precipitated solid matter was filtered off, washed three times with 30 ml of methanol, and placed in 50 ml of toluene. After adding 1.6 g of hexamethyldisilazane and stirring for 10 hours, the product was precipitated with 150 ml of methanol, filtered off and dried in high vacuum. 2.0 g were obtained from the unit [(CH 3 ) 3 SiO 1 / 2 ], [(CH 3 ) 2 SiO 2 / 2 ] and [CH 3 SiO 3 / 2 ] Formed white powder. Hydrodynamic particle radius R measured by sta...

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Abstract

A combination can be made from the following compositions: polymer composition (1) which meets the following conditions: each molecule comprises 0.01 to 3.0 weight percent silicon binding group OR<1> and one or more than one optional polymer composition selected from the following group: (B) vinyl chloride-hydroxypropyl acrylate copolymer, (C) vinyl ester acetate-ethylene polymer, (D) polyvinyl chloride, (E) polyamide, (F) polyester, (G) acrylic ester-polyester polymer, (H) polyamide-polyester polymer, (I) vinyl ester acetate-polyester polymer and (J) monomer (methyl) acrylic ester which meet the following conditions: copolymerization with silicane comprising silicon binding (methyl) acrylate group is completed, (2) silicane of the following general formula: R<3>xSi(OR<2>)4-x, (3) polysiloxane particle which is crosslinked organic polysiloxane particle consisting of a single molecule with the average diameter ranging between 5 nm and 200 nm.

Description

technical field [0001] The invention relates to a composition as well as shaped bodies, sheet-like formations or elastomers. Background technique [0002] EP 718 355 A discloses compositions composed of polyorganosiloxane components, which compositions already have improved antifouling properties compared with the known prior art at the date of their filing, however coatings composed of such compositions Adhesion to polysiloxane substrates is poor. Contents of the invention [0003] The object of the present invention is to improve the known prior art, in particular to further improve the stain resistance and the adhesion. [0004] The present invention relates to a composition obtainable from the following ingredients [0005] Polymer Composition (1) [0006] (A1) by formula (R 1 Si-O 3 / 2 ) unit (T unit) and optional formula (R 3 Si-O 1 / 2 ) of the unit (M unit) composed of polyorganosiloxane [0007] and / or [0008] (A2) by the formula (Si-O 4 / 2 ) unit (Q unit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/54C09D183/04
CPCC09D183/04C08L83/04C08L23/0853C08L2205/02C08L83/00C08L2666/04C08L2666/14
Inventor 尤利娅·亨
Owner WACKER CHEM GMBH
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