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Adhesive silicone elastomer composition

A technology of silicone elastomers and compositions, applied in the directions of adhesives, coatings, textiles and paper making, which can solve problems such as difficulties

Inactive Publication Date: 2010-08-11
BLUESTAR SILICONES FRANCE SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] However, it has been difficult to find adhesives that are strong enough to achieve the desired level

Method used

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  • Adhesive silicone elastomer composition

Examples

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Effect test

Embodiment Construction

[0238] The following examples of the preparation of compositions according to the invention and their use as adhesive tapes serve to facilitate a better understanding of the invention and illustrate its advantages.

[0239] Adhesive preparation

[0240] The following masterbatches were used to prepare different adhesives (corresponding glue (I or I’) and pretreated filler (III)):

[0241] MF 135U

[0242] MF 240U

[0243] MF 345U

[0244] MF 940U

[0245] All masterbatches are products of Bluestar Silicones.

[0246] These masterbatches were mixed with the following substances as described in Table 1:

[0247] - a polymethylhydridosiloxane with a viscosity of 20mPa.s

[0248] - A Karstedt platinum catalyst providing about 4ppm of platinum mixed with the crosslinking inhibitor trimethyldodeynol in a ratio of about 1000ppm

[0249] - 2,5-di-tert-butyl 2,5-hexane peroxide at a content of 0.6%.

[0250] The above concentrations are relative to the masterbatch used...

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Abstract

The present invention relates to a high-performance silicone elastomer composition that is adhesive and that can be crosslinked at high temperature for the assembly of silicone-based substrates, both by platinum and peroxide catalysis, and that may lend itself to a strip conformation. The composition comprises at least one gum, one catalyst and one adhesion promoter of polyorganohydrogensiloxane type, the nature and the amount of said adhesion promoter having been chosen so that Si-H groups are in excess following the reaction for crosslinking the composition, so as to obtain a potential surface density of covalent Si- bonds with the silicone substrate to be bonded of at least one covalent Si- bond per 60 nm2.

Description

technical field [0001] The present invention relates to silicone elastomer compositions which are crosslinkable or vulcanizable by reaction of polyorganosiloxanes with polyorganohydrogensiloxanes under heated conditions in the presence of metal catalysts, preferably platinum-based catalysts , the polyorganosiloxane is crosslinkable by the action of a catalyst based on at least one organic peroxide; or, the polyorganosiloxane contains alkenyl groups. Background technique [0002] These compositions are used, for example, for the bonding of silicone substrates based on fibrous materials, in particular elastic supports, such as woven or non-woven supports, containing at least one silicone coating, so Said coating is obtained by coating or impregnating on at least one of its surfaces with at least one liquid silicone composition which can be cross-linked to form an elastomer. A varnish, especially a silicone varnish, can also be applied over this coating. In these various case...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06N3/12C09D183/07C09D183/05C09J183/04C09J183/07C09J183/05
CPCC09D183/04C09J183/04C08L83/00C08L2666/52C08L2666/54
Inventor 阿兰·普谢隆弗朗西斯·拉费瑟
Owner BLUESTAR SILICONES FRANCE SAS
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