US 11,958,957 B2 · Polyolefin composition providing marking by fluorescence

Abstract

The present invention is directed to a polyolefin composition comprising carbon black which shows fluorescence when irradiated with UV light. The polyolefin composition of the present invention comprises a polyolefin, carbon black in an amount of 0.25 to 1.0 wt %, an optical brightener in an amount of 0.001 to 0.1 wt %, and a UV agent. The present invention is further directed to a molded article comprising the polyolefin composition of the present invention. The present invention is further directed to a wire or cable comprising an outer layer comprising the polyolefin composition of the present invention. Finally, the present invention is directed to a method for detection of a polyolefin composition by UV light and to a method for detection of a molded article or a wire or cable by UV light.

Claims16

Dependent claims

A method for detection of a cable by UV light comprising the following steps:

providing a cable,
irradiating the cable with UV light,
detecting fluorescence emitted from the cable,
the cable comprising an outer layer comprising a polyolefin composition comprising:
(A) a polyolefin,
(B) carbon black in an amount of 0.25 to 1.0 wt % based on the weight of the polyolefin composition,
(C) an optical brightener in an amount of 0.001 to 0.1 wt % based on the weight of the polyolefin composition, and
(D) a UV agent.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/840,001Filed 14 Jun 2022 · division

Priority

EP 1817845519 Jun 2018

Published

US 2022/0306834 A129 Sep 2022

Granted

16 Apr 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification17 codes

C08K 5/0041
Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59: optical brightening agents, organic pigments
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…
C08K 3/04
Elements: carbon
C08K 5/45
Sulfur-, selenium-, or tellurium-containing compounds: heterocyclic compounds having sulfur in the ring

Family

PCT/EP2019/065364Parent of this division · filed 12 Jun 2019

US 2022/0306834 A1Pre-grant publication · published 29 Sep 2022

Application15/734,741Parent of this division

US 2021/0238385 A1Published application

US 11,958,957 B2This patent

From the US filing history. Foreign family members aren’t listed.

Polyolefin composition providing marking by fluorescence

Life of this patent

Polyolefin composition providing marking by fluorescence

Life of this patent

Abstract

Claims16