US 10,377,897 B2Granted

Laser-markable polyamide composition

AssigneeDsm IP Assets B.V.

InventorsRaul Marcelino Perez Graterol, Franciscus Gerardus Henricus Van Duijnhoven, Franciscus Wilhelmus Maria Gelissen, Johannes Hoekstra

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Abstract

The invention relates to a laser-markable polyamide composition comprising: a first phase comprising Sb2O3 and an aliphatic polyamide with an amide density AD1, and a second phase comprising an aliphatic polyamide with an amide density AD2, wherein AD1-AD2 is at least 0.01, and wherein the amount of Sb2O3 is between 0.1 and 5 wt %, a halogen-free flame retardant in an amount of between 1 to 25 wt %, wherein the amount in weight percentage are based on the total amount of composition. The invention also relates to a process for preparing a laser-markable polyamide composition, as well as laser-marked products comprising the composition.

Claims12

Dependent claims

A laser-marked product formed from a laser-markable polyamide composition, wherein the laser-markable polyamide composition comprises:

(a) a first polyamide phase comprising an aliphatic polyamide with an amide density AD1 and between 0.1 and 5 wt. %, based on total weight of the polyamide composition, of Sb2O3,
(b) a second polyamide phase comprising an aliphatic polyamide with an amide density AD2, and
(c) between 1 to 25 wt. %, based on total weight of the polyamide composition, of a halogen-free flame retardant, wherein
each of the amide densities AD1 and AD2 is a ratio of the number of CONH groups per CH2 groups in the polymer repeat units of the aliphatic polyamides of the first and second polyamide phases, respectively, and wherein
a difference between the amide densities AD1 and AD2 (AD1-AD2) is at least 0.01.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/311,346Filed 18 May 2015
Priority: EP 1416903320 May 2014
Published: US 2017/0081513 A123 Mar 2017
Granted: 13 Aug 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

C08L 77/02
Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain ; Compositions of derivatives of such polymers:…
B41M 5/267
Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used: marking of plastic…
C08J 3/203
Compounding polymers with additives, e.g. colouring: solid polymers with solid and/or liquid additives
C08J 3/22
Compounding polymers with additives, e.g. colouring: using masterbatch techniques