Crosslinkable compositions based on organyloxysilane-terminated polymers

A technology for silane crosslinking and composition, which is applied in the field of crosslinkable compositions and can solve problems such as insufficient properties

Inactive Publication Date: 2014-12-03
WACKER CHEM GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, often these properties are not sufficiently pronounced, or disappear at relatively high material shear

Method used

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  • Crosslinkable compositions based on organyloxysilane-terminated polymers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0245] Preparation of clear adhesive formulations

[0246] 98.5 g of silane terminated at both ends and having an average molar mass (M) of 18 000 g / mol n ) and has the formula -O-C(=O)-NH-(CH 2 )-Si(CH 3 )(OCH 3 ) 2 The terminal linear polypropylene glycol (commercially available from Wacker Chemie AG under the name STP-E30) and 4.0 g of vinyltrimethoxysilane, 67.1 g of diisononylcyclohexane-1,2-dicarboxylate (commercially available under the name "Hexamoll" from BASF AG, Ludwigshafen, Germany DINCH"), 1.6 g of UV stabilizer (commercially available under the name of Clariant Produkte GmbH, Frankfurt a.M., Germany 3206liq.; CAS number: 82493-14-9) and 0.6 g of HALS stabilizer (commercially available under the name BASF AG, Ludwigshafen, Germany) 123; CAS No: 129757-67-1) at 25°C and 200 rpm for 2 minutes in a PC-Laborsystem laboratory planetary mixer equipped with a two-rod mixer (two beam mixers). Thereafter, the 12.15g with about 200m 2 Hydrophilic fumed silica w...

Embodiment 2

[0253] Preparation of clear adhesive formulations

[0254] 101 g of silane terminated at both ends and having an average molar mass (M) of 18 000 g / mol n ) and has the formula -O-C(=O)-NH-(CH 2 )-Si(CH 3 )(OCH 3 ) 2 The terminal linear polypropylene glycol (commercially available from Wacker Chemie AG under the name STP-E30) and 4.0 g of vinyltrimethoxysilane, 69.8 g of diisononylcyclohexane-1,2-dicarboxylate (commercially available under the name "Hexamoll" from BASF AG, Ludwigshafen, Germany DINCH"), 1.6 g of a UV stabilizer (commercially available under the name of BASF AG, Ludwigshafen, Germany 400; CAS number: 153519-44-9) and 0.6 g of a HALS stabilizer (commercially available under the name BASF AG, Ludwigshafen, Germany) 123; CAS No: 129757-67-1) Homogenize for 2 minutes at 25° C. at 200 rpm in a laboratory planetary mixer of PC-Laborsystem equipped with a twin-rod mixer. After that, 9.5g with about 200m 2 / g BET surface area, 0 methanol number and 0% by weig...

Embodiment 3

[0257] Preparation of clear adhesive formulations

[0258] 50.5 g of silane terminated at both ends and having an average molar mass (M) of 18 000 g / mol n ) and has the formula -O-C(=O)-NH-(CH 2 )-Si(CH 3 )(OCH 3 ) 2 The terminal linear polypropylene glycol (commercially available from Wacker Chemie AG under the name STP-E30) and 50.5 g with silane ends at both ends and an average molar mass (M) of 18000 g / mol n ) and has the formula -O-C(=O)-NH-(CH 2 ) 3 -Si(OCH 3 ) 3 The terminal linear polypropylene glycol (commercially available from Wacker Chemie AG under the name STP-E35) and 4.0 g of vinyltrimethoxysilane, 69.8 g of diisononylcyclohexane-1,2-dicarboxylate (commercially available under the name "Hexamoll" from BASF AG, Ludwigshafen, Germany DINCH"), 1.6 g of a UV stabilizer (commercially available under the name of BASF AG, Ludwigshafen, Germany 400; CAS number: 153519-44-9) and 0.6 g of a HALS stabilizer (commercially available under the name BASF AG, Ludw...

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Abstract

The invention relates to crosslinkable compositions of silane-crosslinking prepolymers comprising (A) 100 parts by weight of silane-crosslinking polymers of the formula (I): Y-[(CR1 2)b-SiRa(OR2)3-a]x, where the radicals and indices are each as defined in claim 1, (B) 5 to 100 parts by weight of fumed silica comprising (B1) fumed hydrophilic silica and (B2) fumed hydrophobic silica, with the proviso that (B1) and (B2) are used in a mass ratio of 10:1 to 1:10, to processes for production thereof and to the use thereof as adhesives and sealants, especially for bonding of substrates.

Description

technical field [0001] The present invention relates to a crosslinkable composition of a silane crosslinked prepolymer, to a process for preparing the composition and to its use as adhesives and sealants, especially for bonding substrates. Background technique [0002] Polymer systems with reactive alkoxysilyl groups have long been known. When exposed to water or air humidity, these alkoxysilane-terminated polymers can polycondensate with each other by eliminating alkoxy groups even at room temperature. One of the most important applications of such materials is the production of adhesives, especially elastic binder systems. [0003] Thus, adhesives based on alkoxysilane crosslinked polymers in the cured state exhibit not only good adhesion to some substrates, but very good adhesion as they can be both tear-resistant and highly elastic mechanical properties. A further key advantage of silane crosslinker systems over many other adhesive and sealant technologies (eg over is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/10C09J183/12
CPCC08G77/445C08K5/3415C08K3/36C08G77/46C09J183/12C09J183/10C08K5/5425C08K5/5455C08G65/336C09D5/34C08K9/06C08L67/02C08L71/02C09J5/00C09J11/04C09J167/02C09J171/02C09K3/1018
Inventor 福尔克尔·斯坦耶克沃尔弗拉姆·申德勒埃尔克·施维巴赫
Owner WACKER CHEM GMBH
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