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Adhesive and sealant systems

A sealant and adhesive technology, applied in non-polymer adhesive additives, adhesive additives, etc., can solve problems such as limited use

Inactive Publication Date: 2006-12-27
DEGUSSA AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the use of compacted hydrophilic fumed silica in adhesives and sealants is relatively limited

Method used

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  • Adhesive and sealant systems
  • Adhesive and sealant systems
  • Adhesive and sealant systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0191] Example 1: Epoxy-based adhesive

[0192] The AEROSIL(R) substance used is a fumed silica:

[0193] -AEROSIL(R) 202

[0194] - AEROSIL® R 202 VV 60

[0195] -AEROSIL(R) 202 VV 90

[0196] The test formulations for epoxy resins were:

[0197] Component A (resin component): 94.4% Araldit M (bisphenol A resin)

[0198] 5.6% AEROSIL(R) 202 (fumed silica)

[0199] Component B (hardener component): 90.9% Euredur 250 (polyaminoamide hardener)

[0200] 9.1% HY960 (quaternary amine as accelerator)

[0201] step:

[0202] Add silica directly to epoxy resin. The silica was completely wetted with the resin in a high speed laboratory mixer (5 cm diameter, Cowles pan) at 1000 rpm. Measure the mixing time. Disperse in a high-speed laboratory mixer at 3000 rpm for 5 minutes. The sample is then ventilated. Store the resin / silica mixture at 25 °C for 1.5 h, then add the hardener component at 1000 rpm, heat to 25 °C for 1 min, and rotate with...

Embodiment 2

[0207] Example 2: Epoxy-based adhesive

[0208] The AEROSIL(R) substance used is a fumed silica:

[0209] -AEROSIL(R) 202

[0210] - AEROSIL® R 202 VV 60

[0211] -AEROSIL(R) 202 VV 90

[0212] - AEROSIL® R 805

[0213] - AEROSIL® R 805 VV 60

[0214] - AEROSIL® R 805 VV 90

[0215] step:

[0216] The test formulations for epoxy resins were:

[0217] Component A (resin component): 92.0% Araldit M (bisphenol A resin)

[0218] 8.0% AEROSIL(R) 202 (fumed silica)

[0219] Component B (hardener component): 90.9% Euredur 250 (polyaminoamide hardener)

[0220] 9.1% HY 960 (quaternary amine as accelerator)

[0221]Add silica directly to epoxy resin. The silica was completely wetted with the resin in a high speed laboratory mixer (5 cm diameter, Cowles pan) at 1000 rpm. Measure the mixing time. Disperse in a high-speed laboratory mixer at 3000 rpm for 5 minutes. The sample is then ventilated. Store the resin / silica mixture at 25 °C for...

Embodiment 3

[0227] Weigh out the Desmoseal M 100 followed by the Mesamoll. Dynasylan Glymo was added followed by homogenization with a high speed laboratory mixer at 1000 rpm. Add OmyaBLP-3 and homogenize with a high speed mixer at 1000 rpm. Add AEROSIL(R). Homogenize with a high speed mixer at 1000 rpm and disperse in vacuum at 3000 rpm for 10 minutes. Rheological properties were determined at 25°C and flow behavior was determined according to ASTM-D-2202. In this test, the sealant is introduced into a standardized test block and stored in a vertical position at room temperature. The distance traveled by the lower side of the sealant in the block is measured in mm.

[0228] The AEROSIL(R) substance used is a fumed silica:

[0229] -AEROSIL(R) 202

[0230] - AEROSIL® R 202 VV 60

[0231] -AEROSIL(R) 202 VV 90

[0232] A simple one-component polyurethane sealant formulation based on Desmoseal M 100 was used for the examples, it is also possible to prepare polyurethane adhesives usi...

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Abstract

Adhesive and sealant systems based on epoxy resins, polyurethane, silane-terminated polymers, silicones, unsaturated polyester resins, vinyl ester resins, acrylates, polyvinyl acetate, polyvinyl alcohol, polyvinyl ether, ethylene vinyl acetate, ethylene-acrylic acid copolymers, polyvinyl acetates, polystyrene, polyvinyl chloride, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, butyl rubber, polysulfide, polyethylene, polypropylene, fluorinated hydrocarbons, polyamides, saturated polyesters and copolyesters, phenol-formaldehyde resins, cresol- / resorcinol-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins, polyimides, polybenzimidazoles, polysulfones, which contain 1 wt.% to 15 wt.% of a compacted, hydrophobic pyrogenic silica.

Description

technical field [0001] This invention relates to adhesive and sealant systems. Background technique [0002] Adhesive and sealant systems are known from Ullmanns Enzyklopadie dertechnischen Chemie, 4 th Edition, Volume 14, page 227 (1997). [0003] Adhesive and sealant systems consist of high polymers with the highest possible strength. Most adhesives and sealants contain as building blocks high molecular weight organics or reactive organics that are precursors to polymers and react to form polymers during the bonding and sealing process. [0004] Various adhesive and sealant systems are known, e.g. based on epoxy, polyurethane or vinyl ester resins, hydrophobic fumed silica compared to hydrophilic fumed silica Is a very effective thixotropic agent. Furthermore, said adhesive and sealant systems can be obtained with better storage stability with hydrophobic fumed silica than with hydrophilic fumed silica (Degussa Schriftenreihe Pigmente (2001) No. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J11/04C08K3/36
CPCC09J11/04C08K3/00C08K3/36C09J11/02
Inventor 吕迪格·诺瓦克维尔纳·米歇尔皮娅·布克尔
Owner DEGUSSA AG
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