Thermoplastic Resin Composition for Laser Direct Structuring, and Molded Article Comprising Same
US-2020148849-A1 · May 14, 2020 · US
Laser-markable polymers and coatings
US10822505B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10822505-B2 |
| Application number | US-201615748412-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 13, 2016 |
| Priority date | Jul 28, 2015 |
| Publication date | Nov 3, 2020 |
| Grant date | Nov 3, 2020 |
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- Title
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Abstract
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The present invention relates to laser-markable polymers and coatings which are distinguished by the fact that they comprise tin/antimony oxide-coated spherical TiO2 particles of defined particle size as laser additive.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for the production of darkened laser-markings on a laser-markable polymer or on a laser-markable polymeric coating, which comprises: laser-treating the polymer or polymeric coating, which polymer or polymeric coating comprises a polymer and, in the polymer, a laser additive, which laser additive comprises spherical TiO 2 particles which are coated on the surface with an antimony-doped tin dioxide layer (Sn,Sb)O 2 and the TiO 2 particles have a number weighted particle size of <15 μm, measured at the D 95 by means of laser diffraction, and wherein, in the resulting polymer or polymeric coating, the laser-treating results in reducing the TiO 2 in the laser additive to Ti x O y , which results in a visibly darkened marking with a surface which is not roughened, where it was laser-treated. 2. The method of claim 1 , wherein the content of antimony in the tin dioxide layer is 0.1-60 mol %, based on the tin dioxide. 3. The method of claim 1 , wherein the laser additive has a number-weighted particle size of ≥0.05 μm, measured at the D 25 by means of laser diffraction. 4. The method of claim 1 , wherein the laser additive is employed in a concentration of 0.005 to 30% by weight, based on the polymer or polymeric coating. 5. The method of claim 1 , wherein the polymer is a thermoplastic, thermoset, elastomer or silicone. 6. The method of claim 1 , wherein the polymer additionally comprises one or more coloured pigments and/or dyes. 7. The method of claim 1 , wherein the content of antimony in the tin dioxide layer is 2-15 mol %, based on the tin dioxide. 8. A moulding composition, a product, a part or a film, which comprises a dark laser-marking on a polymer or polymeric coating thereof, which marking was produced by the method of claim 1 . 9. A powder coating, which comprises a dark laser-marking thereon, which marking was produced by the method of claim 1 .
Assignees
Inventors
Classifications
Polypropene · CPC title
- C09D7/62Primary
modified by treatment with other compounds · CPC title
characterised by the additives · CPC title
characterised by particle size or shape · CPC title
Coating · CPC title
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Frequently asked questions
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- What does patent US10822505B2 cover?
- The present invention relates to laser-markable polymers and coatings which are distinguished by the fact that they comprise tin/antimony oxide-coated spherical TiO2 particles of defined particle size as laser additive.
- Who is the assignee on this patent?
- Merck Patent Gmbh
- What technology area does this patent fall under?
- Primary CPC classification C09D7/62. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 03 2020 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).