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Siloxane-based lubricating composition releasing no hydrogen, its method of preparation and its use

A lubricating composition, siloxane-based technology, applied in the field of pneumatic or semi-pneumatic tires, vulcanized bladders, lubrication: can solve the problems of undesired, deactivation, molding/demolding number reduction, etc.

Inactive Publication Date: 2009-07-22
BLUESTAR SILICONES FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] However, despite the lubricating advantages, such compositions have the disadvantage of using, for example, tin-based metal-type condensation catalysts, which are expensive and whose presence is undesirable due to toxicity
Furthermore, these emulsions have the disadvantage of losing activity after prolonged storage, which contributes to the recognized decrease in mold / demold numbers in the mold / bladder demold cycles used in tire manufacturing

Method used

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  • Siloxane-based lubricating composition releasing no hydrogen, its method of preparation and its use
  • Siloxane-based lubricating composition releasing no hydrogen, its method of preparation and its use
  • Siloxane-based lubricating composition releasing no hydrogen, its method of preparation and its use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0194] Prepare emulsion A (the present invention), the kind and the ratio of these components are listed in the following table 1 respectively:

[0195] Table 1 Emulsion A (the present invention)

[0196]

[0197]

[0198] (1) An MDT resin having a hydroxylation rate of 0.5% by weight, an average number of organic groups per molecule per silicon atom of 1.5, a dynamic viscosity of 0.1 Pa.s at 25° C. and the following ratio of siloxy units:

[0199] M: 17mol%

[0200] D: 26mol%

[0201] T: 57mol%

[0202] The % given below are by weight relative to the total weight of the composition.

[0203] The preparation of composition A of the present invention :

[0204] The lubricating compositions of Table 1 were prepared as follows.

[0205] with anchor claws In the reactor, homogenize non-reactive polydimethylsiloxane (A), reactive oil (B), resin (C), methyltriethoxysilane (D), surfactant (F) and a portion of distilled water (at a water / surfactant ratio of 0.9).

[02...

Embodiment 2

[0209] Example 2 - the invention

[0210] Emulsion B (invention) was prepared by the same procedure as Example 1. The types and proportions of these ingredients are given in Table 2 below:

[0211] Table 2 Emulsion B (the present invention)

[0212]

[0213] (1) MDT resin having a hydroxylation rate of 0.5% by weight, an average number of organic groups per silicon atom per molecule of 1.5, a dynamic viscosity of 0.1 Pa.s at 25° C. and the following ratio of siloxy units:

[0214] M: 17mol%

[0215] D: 26mol%

[0216] T: 57mol%

[0217] The resulting emulsion was characterized by an average particle size of 0.510 μm, a Brookfield viscosity of 271 cps (A3V100), and a solids content of 31.0% by weight (60 min, 120° C.).

[0218] Embodiment 3-comparative example

[0219] Emulsion C (comparative) was prepared by the same procedure as Example 1. The types and proportions of these ingredients are given in Table 3 below:

[0220] Table 3 Emulsion C (comparison)

[02...

Embodiment 4

[0227] Embodiment 4-comparison

[0228] Emulsion D (comparative) was prepared by the same procedure as Example 1. The types and proportions of these ingredients are given in Table 4 below:

[0229] Table 4 Emulsion D (comparison)

[0230]

[0231] (1) MDT resin having a hydroxylation rate of 0.5% by weight, an average number of organic groups per silicon atom per molecule of 1.5, a dynamic viscosity of 0.1 Pa.s at 25° C. and the following ratio of siloxy units:

[0232] M: 17mol%

[0233] D: 26mol%

[0234] T: 57mol%

[0235] The resulting emulsion was characterized by an average particle size of 0.550 μm, a Brookfield viscosity of 358 cps (A3V100), and a solids content of 32.0% by weight (60 min, 120° C.).

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Abstract

The present invention relates to a lubricating composition, particularly suitable for lubrication of: internal surfaces of uncured or unvulcanized envelopes intended for the manufacture of rubber pneumatic or semi-pneumatic tyres for vehicles; and of vulcanization bladders used for the shaping and vulcanizing of pneumatic or semi-pneumatic tyres.

Description

technical field [0001] The present invention relates to a lubricating composition, which is especially suitable for lubricating: [0002] - inner surfaces of raw or unvulcanized envelopes (enveloppes) for the production of pneumatic or semi-pneumatic rubber tires for vehicles, and [0003] -Vulcanization bladders (vessies) for molding and vulcanization of pneumatic or semi-pneumatic tyres. [0004] The present invention also relates to vulcanized bladders coated with the lubricating composition of the present invention, and pneumatic or semi-pneumatic tires coated with the lubricating composition. [0005] According to two further aspects of the invention, the invention relates to the use of said lubricating composition for lubricating the inner surfaces of vulcanized bladders and green or unvulcanized tire casings for the production of pneumatic or semi-pneumatic rubber tires for vehicles. Background technique [0006] Rubber tires for vehicles are usually manufactured by...

Claims

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Application Information

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IPC IPC(8): C09D183/04C10M173/02B29C33/64C10N20/02B60C17/10C10N30/06C10M107/50C10N40/36C10M111/04
CPCB29D30/0662C08G77/18C10M2229/041B60C17/10C10M2229/045C08G77/16C08G77/24C08L83/04C10M2227/04C10M2227/025C10M2229/0455C08G77/80C10M2229/025C10M2227/02B29C33/64C08G77/70C10M2209/0863C10M2227/045C10M107/50C08G77/26C10M2209/0845C10M111/04C10M2209/086C10M2229/02C10M173/02C10M2209/084C10M2229/0465C10M2229/0415C08G77/20Y10T152/10036C08L2666/02C08L2666/44C10M2205/04C10M2205/043C09D183/04B60C5/14C10N2030/06
Inventor S·布勒尼格N·马丁
Owner BLUESTAR SILICONES FRANCE SAS