UV and heat stable flame-retardant glass filled polymer composition and reinforced articles therefrom

A composition comprising:

• a. between 30 and 50 wt.% of a heterophasic polypropylene;
• b. between 0.4 and 1.7 wt.% of a mixture of light and heat stabilizing additives, comprising:
• i. a high molecular weight hindered tertiary amine light stabilizer (t-HM-HALS) having a weight average molecular weight of between 1600 and 5000 g/mol;
• wherein the amount of said t-HM-HALS is between 0.1 to 0.4 wt. %, based on the total weight of the composition;
• ii. a low molecular weight hindered secondary amine light stabilizer (s-LM-HALS) is a fatty acid ester of 2,2,6,6-tetra-methyl-4-pipiridinol or a mixture of fatty acids thereof;
• wherein the amount of said s-LM-HALS is between 0.2 and 0.8 wt. % based on the total weight of the composition;
• and
• iii. an alkyl ester of a 3,5-dialkylated 4-hydroxyphenyl propionic acid or a n-alkyl-3,5-dialkylated 4-hydroxybenzoate;
• wherein the amount of said propionic acid or benzoate is between 0.1 and 0.5 wt. %, based on the total weight of the composition;
• c. between 0.01 and 1.0 wt. % of a mixture of antioxidant additives, comprising:
• iv. a phenolic antioxidant;
• and
• v. a phosphite additive;
• d. between 10 to 35 wt. % of a flame-retardant composition comprising a mixture of an organic phosphate compound, an organic phosphoric acid, and a zinc oxide;
• and
• e. between 30 and 50 wt. % of glass fibers;
• wherein the wt. % are based on the weight of the composition.