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Suspension for producing a layer increasing the coefficient of friction, molded part having such a layer increasing the coefficient of friction, method for the production thereof, and use thereof

一种增大摩擦、悬浮体的技术，应用在摩擦夹紧的可卸紧固件、摩擦衬片、机械设备等方向，能够解决低温度稳定性等问题，达到高粘附摩擦系数的效果

Inactive Publication Date: 2012-05-09
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this safety device is especially the low temperature stability

Method used

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  • Suspension for producing a layer increasing the coefficient of friction, molded part having such a layer increasing the coefficient of friction, method for the production thereof, and use thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0109] Example 1: SiC with ethanolated 2 - Coating of sol-gel-adhesive and hard material SiC

[0110] Mix 87g BaSO 4 (Sachtoperse HU-N from the company Sachtleben) was mixed into 783 g of the binder Inosil SB (Inomat GmbH) and subsequently dispersed with an Ultra-Turrax (IKA company) for 10 minutes.

[0111] Average particle size d 50 = 12μm and d 97 - 130 g of SiC powder with a value of 22 μm is mixed into a mixture of binder and BaSO 4 Make up the premix for an hour. The binder is made with SiO 2 - Nanoparticles of SiO 2 - Sol-gel-nanocomposite formation, which is surface-modified with hydrolyzable residues of silanes. The suspension was applied with a HVLP applicator gun. After drying the coating at room temperature the layer was calcined at 350° C. for 30 minutes. After calcination, the average matrix layer thickness was about 5 μm and the surface coverage with SiC particles was about 20% as determined by optical microscopy.

example 2

[0112] Example 2: Boehmite-SiO with binder 2 -Coating of sol and hard material SiC

[0113] Heat 500ml of water to 85°C to 95°C. 34 g of nanoscale boehmite powder were then added under vigorous stirring. Homogenization was performed within 10 minutes with vigorous stirring. The suspension was gelled with 6 ml of concentrated nitric acid at process temperature. No aging step at elevated temperature was performed. The sol is concentrated during the manufacturing process. The sol was diluted by adding water to a boehmite solids content of 7.1% by weight (corresponding to a content of 8.3 g of hydrated boehmite powder). 500 g of Dynasylan Sivo 110 (Evonik Degussa) were stirred into 500 g of cold boehmite sol.

[0114] Average particle size d 50 = 12μm and d 97 - 80 g of SiC powder with a value of 22 μm are mixed in 920 g of a premix consisting of boehmite sol and Dynasylan Sivo 110 for one hour.

[0115] The suspension was applied with a HVLP applicator gun. The la...

example 3

[0116] Example 3: SiO with ethanol 2 - Coating of sol-gel-adhesive and hard material SiC

[0117] 40 g of HDK N20 (fumed silica, Wacker-Chemie AG) were mixed in 830 g of binder Inosil SB (Inomat AG) with a stirring assembly and subsequently dispersed with an Ultra-Turrax (IKA company) for 60 minutes.

[0118] Average particle size d 50 = 35μm and d 97 - 130 g of SiC powder with a value of 60 μm are mixed into the premix consisting of binder and HDK N20 for one hour. The binder is made with SiO 2 - Nanoparticles of SiO 2 - Sol-gel-nanocomposite formation, which is surface-modified with hydrolyzable residues of silanes. The suspension was applied with a HVLP applicator gun. The layer was tempered at 100° C. for 30 minutes after drying the coating at room temperature. The average base layer thickness was about 8 μm, and the surface coverage with SiC particles was about 20% as determined by optical microscopy.

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Abstract

The invention relates to a suspension for producing a layer increasing the coefficient of friction on a substrate, comprising a liquid suspension medium, an extensively inorganic bonding agent, or the precursor compounds thereof, and suspended hard material particles. The invention further relates to a molded part, comprising a substrate and a layer increasing the coefficient of friction applied to at least one part of the surface of the substrate, comprising an extensively inorganic bonding agent matrix and hard material particles embedded therein, wherein the thickness of the bonding agent matrix is less than the average particle size of the hard material particles, so that the hard material particles protrude out from the bonding agent matrix, and wherein the layer increasing the coefficient of friction has been formed from a suspension according to the invention. The invention further relates to a method for producing the molded part described above, and the use thereof for producing press or clamped connections as a retaining element for screw connections.

Description

technical field [0001] The invention relates to a suspension for producing a friction-increasing layer on a substrate, a shaped body consisting of a substrate and a friction-increasing layer applied thereto, a method for producing such a shaped body and Such molded bodies are used for the production of press or clamp connections or as securing elements for screw connections. The coefficient-of-friction-increasing layer designed according to the invention is characterized by its adhesive coefficient-of-friction-increasing properties, temperature stability and corrosion stability, and can be applied to large-area components and different materials. Background technique [0002] Non-positive connections are commonly used in all areas of mechanical engineering to transmit shear forces or torques. In addition to the structural conditions, the magnitude of the various transmittable forces depends primarily on the adhesive friction coefficients of the surfaces of the interconnecte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02F16D1/08F16B2/00F16B39/22
CPCF16D2300/10F16D69/02F16D1/08F16B39/22F16B2/005Y10T428/24372
Inventor 于尔根・迈耶蒂莫・泽格尔克里希纳・于贝尔斯文・施赖纳
Owner 3M INNOVATIVE PROPERTIES CO
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