Patent ID: 8217119

Claim:
Polymeric compositions comprising: 1) at least one thermoprocessable semicrystalline halopolymer; 2) 0.01%-10% by weight of 1) of an additive formed of one or more (per)fluoropolyether polymers of formula Q-O-[A-B] z -[A-B′] z -A-Q′ (I) wherein: A=—(X) a —O-A′-(X′) b — wherein A′ is a perfluoropolyether chain comprising one or more repeating units selected from the group consisting of (CF 2 O), (CF 2 CF 2 O), (CF 2 CF 2 CF 2 O), (CF 2 CF 2 CF 2 CF 2 O), (CF(CF 3 )O), (CF(CF 3 )CF 2 O), and (CF 2 CF(CF 3 )O); X, X′, equal to or different from each other, are —CF 2 —, —CF 2 CF 2 —, or —CF(CF 3 )—; a, b, equal to or different from each other, are integers equal to 0 or 1 with the proviso that the block A linked to the Q-O— end group has a=1 and the block A linked to the Q′ end group has b=0; B is a block formed of units deriving from one or more olefins, wherein at least one of B is homopolymerizable by radical route, and of formula: —[(CR 1 R 2 —CR 3 R 4 ) j (CR 5 R 6 —CR 7 R 8 ) j′ ]— (Ia) wherein j is an integer from 1 to 30, j′ is an integer from 0 to 29, with the proviso that (j+j′) is higher than 2 and lower than 30; R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 , R 8 , equal to or different from each other, are selected from halogen; H, C 1 -C 6 (per)haloalkyl, wherein the halogen is F, or Cl; C 1 -C 6 alkyl, optionally containing heteroatoms; C 1 -C 6 oxy(per)fluoroalkyl; said substituents R 1 -R 8 optionally containing one or more functional groups; B′ is a block deriving from one or more olefins and has formula (Ia) but having at least one among the R 1 -R 8 substituents has a meaning different from that in B, (j+j′) being higher than or equal to 2 and lower than 30; z is an integer higher than or equal to 2; z′ is 0 or an integer; z, z′ are such that the number average molecular weight of the polymer of formula (I) is between 500 and 500,000; Q and Q′, equal to or different from each other, are selected from non functional perfluoroalkyl end groups from 1 to 3 carbon atoms, one fluorine atom can be substituted by one chlorine or hydrogen atom, C 1 -C 6 non fluorinated alkyls; from functional end groups -(CFW)-Dq-Tk wherein W=F, CF 3 , k is an integer ranging from 1 to 4, q is equal to 0 or 1, D is a bridging group, and the group Tk is selected from the group consisting of —SH, —SR′, —NR′ 2 , —SiR′ d L 3-d , wherein L is an OR′ group, d is an integer between 0 and 3, —CN, —NCO, —CH═CH 2 , —CHO, —CH(OCH 3 ) 2 , —C(OCH 3 )═NH, —C(NH 2 )═NH, —CH(OH)CH 2 OH, —CH(CH 2 OH) 2 , —CH(COOH)—CH(COOR′) 2 , —CH(CH 2 NH 2 ) 2 , —NH 2 , —NHR′, —N(R′) 2 , —CH(CN) 2 , —CH(CH 2 OCH 2 CH═CH 2 ) 2 , —C(OH) 2 CF 3 , —OH, —CH 2 OH; —COY with Y═OH, OR′, CF 3 , NH 2 , NHR′, NR′R″, or halogen; wherein R′, R″ are an alkyl, cycloaliphatic or aromatic group, R′, R″ optionally containing fluorine; an aryl radical formed of one or more aromatic rings, optionally condensed; and an heterocyclic radical.