Artificial turf fiber with uv protection substances

Patent metadata

Field	Value
Publication number	US-2020407533-A1
Application number	US-201916976878-A
Country	US
Kind code	A1
Filing date	Feb 11, 2019
Priority date	Mar 9, 2018
Publication date	Dec 31, 2020
Grant date	—

Abstract

The invention relates to a polymer-based artificial turf fiber comprising substances (216) adapted for protecting the fiber against UV radiation. The substances comprise a hindered amine light stabilizer—HALS and a first and a second UV-absorbent substance. The molecular weights of the first and the second UV-absorbent substances differ from each other by at least 100 g/mol.

First claim

1 . A polymer-based artificial turf fiber comprising substances adapted for protecting the fiber against UV radiation, the substances comprising:
a hindered amine light stabilizer—HALS; and a first UV-absorbent substance; and a second UV-absorbent substance, the molecular weights of the first and the second UV-absorbent substances differing from each other by at least 100 g/mol.

2 . The artificial turf fiber of claim 1 , the HALS being 1,3-propanediamine, N,N-1,2-ethanediylbis-, reaction products with cyclohexane and peroxidized N-butyl-2,2,6,6-tetramethyl-4-piperidinamine-2,4,6-trichloro-1,3,5-triazine reaction products.

3 . The artificial turf fiber of claim 1 , the HALS being an N-methyl-HALS, the HALS being in particular 1,6-Hexanediamine, N,N′-bis(2,2,6,6-tetramethyl-4-piperidinyl)-, polymers with morpholine-2,4,6-trichloro-1,3,5-triazine.

4 . The artificial turf fiber of claim 1 , the first UV-absorbent substance having a molecular weight smaller than 800 g/mol, preferably smaller than 600 g/mol.

5 . The artificial turf fiber of claim 1 , the first UV-absorbent substance being a sterically hindered phenolic antioxidant, in particular octadecyl-3-(3,5-di-tert.butyl-4-hydroxyphenyl)-propionate.

6 . The artificial turf fiber of claim 1 , the second UV-absorbent substance having a molecular weight higher than 800 g/mol, preferably higher than 1000 g/mol.

7 . The artificial turf fiber of claim 1 , the second UV-absorbent substance being a sterically hindered phenolic antioxidant, in particular pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate).

8 . The artificial turf fiber of claim 1 , further comprising an organophosphite antioxidant ( 210 ).

9 . The artificial turf fiber of claim 8 , the organophosphite antioxidant being tris(2,4-ditert-butylphenyl)phosphite.

10 . The artificial turf fiber of claim 1 , the artificial turf fiber comprising the organophosphite antioxidant by at least 0.01%, more preferably by at least 0.05%, more preferably by at least 0.15% of the fiber's weight.

11 . The artificial turf fiber of claim 1 , the artificial turf fiber comprising:
the HALS by at least 0.4%, more preferably by at least 0.6%, more preferably by at least 0.8% of the fiber's weight; and/or the first UV-absorbent substance by at least 0.05%, more preferably by at least 0.1%, more preferably by at least 0.2% of the fiber's weight; and/or the second UV-absorbent substance by at least 0.01%, more preferably by at least 0.05%, more preferably by at least 0.15% of the fiber's weight.

12 . The artificial turf fiber of claim 1 , further comprising a booster of photocatalytic degradation of the polymer material of the fiber, the booster being a metal salt or metal oxide.

13 . The artificial turf fiber of claim 12 , the booster being TiO2.

14 . An artificial turf comprising artificial turf fibers according to claim 1 .

15 . The artificial turf of claim 14 , comprising:
first artificial turf fibers according to claim 1 , the first artificial turf fibers comprising the booster of photocatalytic degradation, the booster being in particular a metal salt or metal oxide, the booster of photocatalytic degradation being a first pigment having a white or bright color; second artificial turf fibers and/or third artificial turf fibers, wherein the second artificial turf fibers are free of the first pigment and comprise at least 10% less of each of the substances than the at least one first fiber, wherein the third artificial turf fibers are free of the first pigment and are free of one or more or all of the substances.

16 . The artificial turf of claim 14 , further comprising rubber infill, the rubber comprising a plasticizer.

17 . A method of producing an artificial turf fiber comprising:
creating a polymer mixture, the creation comprising mixing a polymer-based polymer and substances adapted for protecting the fibers against UV radiation, the substances comprising: a hindered amine light stabilizer—HALS; and a first UV-absorbent substance; and a second UV-absorbent substance, the molecular weights of the first and the second UV-absorbent substances differing from each other by at least 100 g/mol; extruding the polymer mixture into a polymer film or into a monofilament; and processing the film or the monofilament for transforming the film or the monofilament into the artificial turf fiber.

18 . The method of claim 17 , further comprising:
integrating first artificial turf fibers in the carrier, the first artificial turf fibers comprising the substances adapted for protecting the fibers against UV radiation and comprising a booster of photocatalytic degradation, the booster of photocatalytic degradation being in particular a metal salt or metal oxide, the booster of photocatalytic degradation being a first pigment having a white or bright color; integrating second artificial turf fibers and/or third artificial turf fibers in the carrier, the second artificial turf fibers being free of the first pigment, the second artificial turf fibers comprising at least 10% less of each of the substances than the first fibers, the third artificial turf fibers being free of the first pigment and being free of one or more or all of the substances.

19 . A masterbatch adapted for producing an artificial turf fiber, the masterbatch comprising a polyol and substances adapted for protecting the fiber against UV radiation, the substances comprising:
a hindered amine light stabilizer—HALS; and a first UV-absorbent substance; and a second UV-absorbent substance, the molecular weights of the first and the second UV-absorbent substances differing from each other by at least 100 g/mol.

Assignees

• Polytex Sportbelage Produktions Gmbh

Inventors

• Sick Stephan
• Sander Dirk
• Schmitz Dirk
• Jansen Bernd
• Lohr Ivo

Classifications

• C08K5/524

  Esters of phosphorous acids, e.g. of H3PO3 · CPC title

• C08J2377/00

  Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers · CPC title

• D01F1/106

  Radiation shielding agents, e.g. absorbing, reflecting agents · CPC title

• C08K5/005 Primary

  Stabilisers against oxidation, heat, light, ozone · CPC title

• C08K5/134

  Phenols containing ester groups · CPC title