Browse Prior Art Database

Flame Retardant and UV Stabilized Compositions

IP.com Disclosure Number: IPCOM000019831D
Publication Date: 2003-Oct-01
Document File: 5 page(s) / 20K

Publishing Venue

The IP.com Prior Art Database

Related People

Richard Schumacher: CONTACT

Abstract

A TPO-TPE-TPV (automotive) skin, which can be extruded, calandered, slush-moulded or thermoformed, composed of a polyolefin resin and a sterically hindered amine ether flame retardant exhibits excellent flame retardant properties and UV resistance.Another example for combining excellent properties in respect of flame retardancy and UV stability is an expanded polyolefin such as polyethylene (EPE) or expanded polypropylene (EPP) or expanded polyolefin foam, which can be extruded, comprising a sterically hindered amine ether.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 41% of the total text.

Page 1 of 5

Flame Retardant and UV Stabilized Compositions

A TPO, TPE, or/and TPV (automotive) skin, which can be extruded, calandered, slush- moulded or thermoformed, composed of a polyolefin resin and a sterically hindered amine ether flame retardant exhibits excellent flame retardant properties and UV resistance.

Another example for combining excellent properties in respect of flame retardancy and UV stability is an expanded polyolefin such as polyethylene (EPE) or expanded polypropylene (EPP) or expanded polyolefin foam, which can be extruded, comprising a sterically hindered amine ether, for example, 0.1 - 5.0 % by weight, based on the polymer resin.

For further improved flame retardancy, melamine cyanurate is added, e.g. in the range of 1 - 25 % by weight, based on the weight of the polymer resin.

PRODUCT DEFINITIONS

TPE stands for SOFT Touch Thermoplastic Olefin (often simply recalled as TPO in the industry, commercially available inter alia from BENECKE under the name TEPEO®). TPE's typically are blends of polypropylene (PP) and SBS/SEBS polymers.

TPV is Vulcanized TPE (also recalled as soft TPO). Thanks to the vulcanization process, it provides better thermal and mechanical properties; therefore it is also used in skin applications.

Thermoplastic (poly) olefins (TPO) are normally PP-EPDM (or EPR) types; these are more rarely used for skin applications but typically for more rigid applications like consoles, bumpers.

TPE - TPV families typically exhibits a shore A hardness value inferior to 50, while the TPO not used in skins applications exhibits shore A hardness higher then 50.

Suitable sterically hindered amine ether flame retardants are described, inter alia, in the publications WO 99/00450 and US-6271377.

Page 2 of 5

A preferred sterically hindered amine ether flame retardant is the reaction product of 2,4- bis[(1-cyclohexyloxy-2,2,6,6-piperidin-4-yl)butylamino]-6-chloro-s-triazine with N,N'-bis(3- aminopropyl)ethylenediamine. This component has been disclosed in example 3 of US-5844026 (CAS-Reg. No. 191680-81-6).

A preferred composition contains about 0.1 - 5.0 parts by weight of this component on 100 parts of the polymer resin. A further preferred sterically hindered amine ether flame retardant is the compound from example 73 of US-6271377.

COADDITIVES

In these applications, the classical combinations of antioxidants are predominantly used (typically phenoles and phosphite esters, e.g. as disclosed in US-6346619, col. 12, line 10, to col. 13, and col. 17, line 43, to col. 18, line 12). Further coadditives which are often present include thioesters, lactones, UV Stabilizers (HALS, UV absorbers) such as components compiled in said US-6346619 within the same listing, especially from column 15, line 8, to column 17, line 42, and column 19, line 14. to column 20, line 20. Advantageous are UV absorber combinations of EP-A-1308084.

Some other additives providing favourable effects include antistatic agents (e.g. GMS, ethoxylated amine...