Patent ID: 8871834

Claim:
Process for the reduction of headspace emission in a polymer composition, comprising: (a) at least 50 wt.-% polypropylene, (b) 100 to 5,000 ppm of phenolic antioxidants (AO), (c) optionally 100 to 5,000 ppm of phosphorous antioxidants based on the polymer composition, the process comprising the steps: (i) providing a talc (T); (ii) treating the talc (T) to obtain a coated talc (CT); and (iii) reducing the amount of headspace emission by adding 10,000 to 550,000 ppm of the coated talc (CT) to the polymer composition to provide a headspace emission measured according to VDA 227 (a) of all volatiles together of said polymer composition of equal or below 120 μg/g, and/or (b) of 2-methyl-propene of said polymer composition of not more than 70 μg/g, wherein said talc (CT) is coated with an organo-metallic compound (OM), said organo metal compound (OM) is defined by formula (I) or formula (II), said formula (I) is wherein “M” is a metal of the groups 4 to 13 of the Periodic Table, “A 1 ”, “A 2 ”, and “A 3 ” are residues independently selected from the group consisting of R is an alkyl-, alkenyl-, alkinyl- or arylalkyl residue with 1 to 30 carbon atoms, R′ is an alkyl-, alkenyl-, alkinyl- or arylalkyl residue with 1 to 30 carbon atoms, and said formula (II) is wherein “M” is a metal of the groups 4 to 13 of the Periodic Table, “A 4 ” and “A 5 ” are residues independently selected from the group consisting of B is CR″ 2 or carbonyl, D is (CR′″) n , R′ is an alkyl-, alkenyl-, alkinyl- or arylalkyl residue with 1 to 30 carbon atoms, R″ is —H, —CH 3 , or —CH 2 CH 3 , R′″ is selected from the group conisting of —H, —CH 3 , —CH 2 CH 3 , —CH(CH 3 ) 2 , —CH 2 CH 2 CH 3 , —C(CH 3 ) 3 , —CH(CH 3 )CH 2 CH 3 , —CH 2 CH(CH 3 )CH 3 , and —CH 2 CH(CH 3 ) 2 , n is 1 or 2, wherein said polymer composition having coated talc has a lower headspace emission than the same composition but with unmodified talc.