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Compositions containing platinum

A composition, platinum compound technology, applied in the direction of organic compound/hydride/coordination complex catalyst, chemical/physical process, physical/chemical process catalyst, etc., can solve the problems of inaccurate metering and high platinum concentration

Active Publication Date: 2020-05-05
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The handling of this often toxic powdery substance creates problems due to tricky and imprecise dosing due to dust and dust losses
[0008] Depending on the particle size distribution of the pulverulent platinum-containing species with a relatively high oxidation state, reactions to form SiC bonds, especially in silicone polyether systems, have an additional excess platinum concentration at the point of catalyst introduction to the hydrosilylation reactor. High problem (local over-enrichment), which leads to unwanted platinum precipitation and gel formation

Method used

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  • Compositions containing platinum
  • Compositions containing platinum
  • Compositions containing platinum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] Example 1 (invention)

[0123] A cis-dichlorodiammine platinum (II) formulation was prepared in a methyl-terminated polyether starting from allyl alcohol. The molecular weight of the polyether (calculated based on the iodine value) was 1449 g / mol, 12 wt% ring Ethylene oxide, 88wt% propylene oxide, statistical structure.

[0124] By using a Xenox 40e micro stirrer (from Proxxon) rotating at a speed of 20 000 revolutions per minute, 15.36 mg of cis-PtCl 2 (NH 3 ) 2 Introduced uniformly into 2.0 g of the polyether described here.

Embodiment 2

[0125] Example 2 (Invention)

[0126] In the RC1e reaction calorimeter (Mettler-Toledo), 250 g of hydrogen siloxane with the following structural formula is averaged:

[0127] (CH 3 ) 3 Si-(O-Si(CH 3 ) 2 ) 78 -(O-SiH(CH 3 )) 10 -O-Si(CH 3 ) 3 ,

[0128] SiH value: 1.52val / kg,

[0129] And 748.47g molar mass of 1459g / mol (according to the iodine value) of the methyl-terminated polyether starting from allyl alcohol with a statistical structure (allyl polyether) heated to 90 ℃ with stirring, and then with 76.80mg Cis-PtCl prepared in Example 1 2 (NH 3 ) 2 The paste (10 ppm Pt, based on the entire batch) was mixed. While measuring the thermal conversion, samples were taken after 2.5 hours, 3.5 hours, 5.5 hours, and 6.5 hours, the samples were weighed into a glass burette, and then decomposed by adding a sodium butoxide solution. The gas volumetric determination of the SiH value by the volume of hydrogen released along with the reaction allows additional monitoring of the conversion rate...

Embodiment 3

[0130] Example 3 (Invention)

[0131] While maintaining all other parameters cited in Example 2, the reaction mixture composed of hydrogen siloxane and allyl polyether was stirred at 90°C with the cis-PtCl prepared in Example 1. 2 (NH 3 ) 2 The allyl polyether formulation (10 ppm Pt, based on the entire batch) was mixed. The thermal conversion rate and the gas volume conversion rate were determined as described in Example 2.

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Abstract

The present invention provides compositions comprising elemental platinum and / or at least one platinum-containing compound wherein said platinum has a positive oxidation state, and one or more organic compounds comprising carbon atoms, hydrogen atoms and at least two oxygen atoms, wherein at least one of said compounds comprises at least one ethylenically unsaturated bond, characterized in that said composition comprises an organic compound comprising carbon atoms, hydrogen atoms and at least two oxygen atoms in a proportion of 50.0-99.9% by weight, and The proportion of the sum of the element platinum and platinum-containing compounds is 0.1‑50.0% by weight, in each case based on the composition, provided that the proportion of organic compounds containing carbon atoms, hydrogen atoms and at least two oxygen atoms and the sum of the proportions of elemental platinum and platinum-containing compounds is at least 90% by weight of the composition, provided that the content of ethylenically unsaturated bonds is at least 0.1 g iodine per 100 g organic Compound, corresponding to at least 0.004 meq / g, the present invention provides a method for preparing said composition and its use.

Description

Technical field [0001] The present invention relates to a composition comprising elemental platinum and / or at least one platinum-containing compound, wherein the platinum has a positive oxidation state, and one or more organic compounds containing carbon atoms, hydrogen atoms and at least two oxygen atoms , Wherein at least one of the compounds contains at least one ethylenically unsaturated bond, characterized in that the proportion of organic compounds containing carbon atoms, hydrogen atoms and at least two oxygen atoms in the composition is 50.0-99.9% by weight, and The ratio of the sum of elemental platinum and platinum-containing compounds is 0.1-50.0wt%, in each case based on the composition, provided that organic compounds and elements containing carbon atoms, hydrogen atoms and at least two oxygen atoms The sum of the proportions of platinum and platinum-containing organic compounds is at least 90% by weight of the composition, and provided that the content of ethylenic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/08C08G77/442C08G77/46
CPCC08G77/08C08G77/442C08G77/46C08G77/12B01J27/24B01J31/06B01J31/2295B01J31/30B01J2231/323B01J2531/828C08G77/18
Inventor W·克诺特
Owner EVONIK OPERATIONS GMBH
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