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Light stabilizer for highly durable polymer articles

IP.com Disclosure Number: IPCOM000249742D
Publication Date: 2017-Mar-30

Publishing Venue

The IP.com Prior Art Database

Abstract

The compound of formula, disclosed in Example 2 of WO 2011/029744 A1, is particularly useful as a light stabilizer in plastic applications, typically polyolefins, or more specifically thermoplastic polyolefins, in particular agricultural films, for example greenhouse film covers.

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Light stabilizer for highly durable polymer articles

The compound of formula (A), disclosed in Example 2 of WO 2011/029744 A1, is particularly useful as a light stabilizer in plastic applications, typically polyolefins, or more specifically thermoplastic polyolefins, in particular agricultural films, for example greenhouse film covers.

(A)

Typically, such compound is incorporated in the polymer matrix in individual form or through the preparation of a masterbatch that generally speaking is a concentrate of additives, subsequently used, for practical reasons, to obtain the final articles with the desired concentration of the aforementioned compound of the formula (A).

The compound of formula (A) can be used alone or in combination with other types of additives. Either in individual form or using several masterbatches in the preparation of the final article. The compound of formula (A) can be used in automotive applications in combination with a UV-absorber belonging to the family of the benzotriazole, benzophenone, benzoate or triazinic compounds to provide a synergistic effect in the light stabilization performance. Other classes of additives that can be used include antioxidants, acid scavengers, hindered amine stabilizers, slip agents, anti-block agents, fillers, pigments having different functionalities, anti-fog and anti-mist agents, antistatic agents.

Chapter 1:

The compound of formula (A), disclosed in Example 2 of WO 2011/029744 A1, is particularly useful as a stabilizer in compositions containing an organic material susceptible to degradation induced by light, heat, physical stress, radiation, or oxidation. The compound of formula (A) can advantageously be used as a stabilizer in one of the following organic materials (virgin material, production scrap, edge trimmings, recyclates and mixtures thereof):

1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, polybut-1-ene, poly- 4-methylpent-1-ene, polyvinylcyclohexane, polyisoprene or poly-butadiene, polyhexene, polyoctene, as well as polymers of cycloolefins, for instance of cyclopentene, cyclohexene, cyclooctene or nor-bornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), high density and high molecular weight polyethylene (HDPE-HMW), high density and ultrahigh molecular weight polyethylene (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), (VLDPE) and (ULDPE).

Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, preferably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods:

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a) radical polymerisation (normally under high pressure and at elevated tempera-ture).

b) catalytic polymerisation using a catalyst that normally contains one or more than one metal of groups IVb, Vb, VIb or VIII of the Periodic Table. These metals usually have one o...