USE OF AN AGENT FOR PRIMING SILICON SURFACES

Abstract

An agent for priming silicon surfaces, wherein the agent is an emulsion including at least the following components: a catalyst configured to vulcanize rubber mixes, an organic solvent or thinner, a fine particle solid material configured as a thickener and adhesion enhancer, and a varnish paint forming a carrier substance.

Claims

1. An agent for priming silicon surfaces, comprising: an emulsion including: a catalyst configured to vulcanize rubber mixes, an organic solvent or thinner, a fine particle solid material configured as a thickener and adhesion enhancer, and a varnish paint forming a carrier substance.

2. The agent for priming the silicon surfaces according to claim 1, wherein the catalyst configured to vulcanize the rubber mixes is configured as a catalyst configured to vulcanize silicone rubber.

3. The agent for priming the silicone surfaces according to claim 1, wherein the organic solvent or thinner is white spirit.

4. The agent for priming the silicone surfaces according to claim 1, wherein the organic solvent or thinner is an oil from the group consisting of turpentine oil balm, linseed oil, cold pressed linseed oil, natural oil, rapeseed oil, mineral oil or almond oil.

5. The agent for priming the silicone surfaces according to claim 1, wherein the fine particle solid material is configured as glass powder and/or tetrapodal zinc oxide.

6. The agent for priming the silicone surfaces according to claim 1, wherein the varnish paint is water thinnable dispersion varnish paint, a varnish paint including solvent, an acrylic varnish paint, a PU-varnish, a water based polyurethane varnish or an acrylic water varnish.

7. The agent for priming the silicon surfaces according to claim 1, wherein the fine particle solid material is glass powder and/or tetrapodal zinc oxide, wherein the catalyst is 3 to 10 percent by weight, wherein the organic solvent or thinner is 5 to 20% by weight, the fine particle solid material is 4 to 40% by weight, and wherein the varnish paint is 50 to 80% by weight.

8. The agent for priming the silicon surfaces according to claim 1, wherein the catalyst is 6 to 9% by weight, wherein the organic solvent or thinner is 5 to 15% by weight, wherein the glass powder is 5 to 8% by weight, and wherein the varnish paint is the rest.

9. The agent for priming the silicon surfaces according to claim 1, wherein the agent includes polyvinyl pyrrolidone.

10. The use of the agent for priming the silicon surfaces according to claim 1, wherein the agent includes titanium dioxide or food starch or flour.

11. The agent for priming the silicon surfaces according to claim 1, wherein the varnish paint used for the carrier substance includes 20 to 70% by weight of a binder from the group consisting of acrylate dispersion varnish, polyurethane, epoxy, epoxy-based paint binder, alkyd, polysiloxan, and an acrylic based paint binder, or a pure acrylate dispersion.

12. The agent for priming the silicon surfaces according to claim 2, wherein the catalyst configured to vulcanize the rubber mixes is configured as a TFZ-silicone-rubber-type-2-1 catalyst, a catalyst for siloxane, or a catalyst for synthetic rubber or natural rubber.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0045] Several embodiments of the invention will be described infra.

[0046] One application of the product according to the invention is preparing existing silicone gaps at windows, doors, and glazing, in bathroom-, and engineering applications for subsequent paint systems.

[0047] An existing apartment block with four floors and 16 apartments shall be painted by a painter with Meier white paint. The apartment block includes 96 windows. The windows have approximately 400 meters of silicone gaps with gray color. The building includes another 150 meters of gray expansion gaps. Thus, the building includes 550 meters of silicone gaps.

[0048] The existing silicone gaps cannot be painted with any prior art paint system. Now, the painter has to hire another contractor in order to cut out the existing gaps and renew them so they match the new white paint. The cost of restoring or renewing the gaps is approximately 6000 euros net.

[0049] When the painter Meier uses the product according to the invention existing gaps can be painted over. In addition to enormous time savings for matching the color tone of the gaps, the cost is approximately 700 euros net for painting approximately 8 square meters of gaps. The painter Maier and the customer have reduced costs by approximately 90%.

[0050] Another embodiment:

[0051] A dry wall installer Janssen is contracted to install gypsum dry wall. In order to get the job ready for the painter, the dry wall installer uses a typical acrylic sealant in order to seal the gaps between the ceiling and the wall. The dry wall installer Jannsen, however knows the disadvantages of filling the gaps with acrylic. In recent years the dry wall installer has found for this paintable sealant several times that delamination through over expansion has occurred after months or years and complaints were received from customer.

[0052] The reason is that acrylic shrinks is due to high water content and expandability of acrylic sealants which is typically limited to 7%. This technical property causes the problems recited supra.

[0053] When the dry wall installer Janssen introduces a higher quality silicone-based sealant into the gaps, the problems of delamination recited supra are eliminated by the higher movement absorption of the silicone (approximately 25% or more).

[0054] Since the dry wall installer and the painter subsequently use the product according to the invention, this shows that the product can be used by different trades in several construction phases indoors and outdoors. The higher quality gap sealing reduces complaints, reduces costs, and assures that the customer is happy.

[0055] The following composition represents an advantageous example:

TABLE-US-00001 Catalyst  7.14% wt. White Spirit   10% wt. Glass  7.14% wt. Varnish 75.72% wt.

Production of the Composition According to the Invention

[0056] All four components are mixed in a dispersion mixer under vacuum in the ratios recited supra. The composition can be filled into container by machinery.

Testing of the Composition Recited Supra

[0057] Long term testing of painted silicone and sealant surfaces were performed with positive results under European weather conditions.

Production of the Composition According to the Invention

[0058] The following substances were used: [0059] Glass flour/glass powder ST 240 from Reidt GmbH & Co. KG, 52224 Stolberg [0060] Catalyst from the Troll Factory Rainer Habekost e.K., 27339 Riede [0061] Shellsol® D 60 white spirit from Shell [0062] Acrylic varnish from P.A. Jansen GmbH & Co. KG, Bad Neuenahr-Ahrweiler
Test Results with Compositions According to the Invention

[0063] “Oil” according to the invention is an organic solvent or thinner.

TABLE-US-00002 Test 4 % by weight Effect Result Catalyst 7.14% Optimum Good Oil   10% Viscosity adhesion Glass 7.14% and powder coverage Varnish 75.2% without runners [0064] 75.72% Jansen acrylic varnish [0065] 7.14% glass powder/glass flour [0066] 10.0% D60 white spirit [0067] 7.14% Catalyst (silicone rubber)

Other Advantageous Recipes

[0068] Test Recipe 1: [0069] 70.14% Lipaton SB4520 from Symthomer [0070] 9.07% glass powder/glass flour [0071] 11, 60% D60 white spirit [0072] 9.19% Catalyst (silicone rubber)

[0073] Test Recipe 2: [0074] 76.39% water-based polyurethane varnish [0075] 7.14% glass powder/glass flour [0076] 10.00% D60 white spirit [0077] 6.47% Catalyst (silicone rubber)

[0078] Test Recipe 3: [0079] 56.6% acrylic varnish, water-based Wilckens [0080] 25.157% glass powder/glass flour [0081] 7.547% D60 white spirit [0082] 5.66% Catalyst (silicone rubber) [0083] 5.031% Owatrol

[0084] Comparison Tests

TABLE-US-00003 Test 1 % by weight Effect Result Catalyst  1.5% Viscosity Adhesion Oil   3% too high too low, Glass   5% slight powder runners Varnish 90.5%

TABLE-US-00004 Test 2 % by weight Effect Result Catalyst  1.5% viscosity watery Oil   20% too low solution, Glass   7% pronounced powder runners Varnish 71.5%

TABLE-US-00005 Test 3 % by weight Effect Result Catalyst  1.5% desired surface Oil   10% viscosity too rough, Glass   9% no runners powder Varnish 79.5%