01-03-2018 дата публикации
Номер: US20180057681A1
Принадлежит:
Polymer blends comprising components A), B) and C): A) 80 to 96% by weight of an impact modified styrenic polymer A), B) 1 to 7% by weight of a polymer blend B) comprising B1) 25 to 75% by weight of polyisobutylene and B2) 25 to 75% by weight of a polyolefin, C) 3 to 13% by weight of an elastomeric block copolymer C) of structure (A-(B/A))-A, where A is a vinylaromatic block, (B/A) is a random copolymer block of vinylaromatic monomer and diene, and n is 1 to 10, exhibit improved environmental stress crack resistance properties in presence of hydrofluoro olefins. 114-. (canceled)16. The polymer blend according to claim 15 , comprising components A) claim 15 , B) claim 15 , and C) in the following amounts:A) 84 to 94% by weight of the impact modified styrenic polymer A), comprising a styrenic polymer and an impact modifying polymer, in particular HIPS; B1) 25 to 75% by weight of polyisobutylene B1), and', 'B2) 25 to 75% by weight of the polyolefin B2), in particular LDPE and/or LLDPE,, 'B) 1.5 to 6.5% by weight of a polymer blend B), comprising'}C) 4 to 11% by weight of the elastomeric block copolymer C).17. The polymer blend according to claim 15 , comprising components A) claim 15 , B) claim 15 , and C) in the following amounts:A) 84.5 to 93% by weight of the impact modified styrenic polymer A), comprising a styrenic polymer and an impact modifying polymer, in particular HIPS; B1) 25 to 75% by weight of polyisobutylene B1), and', 'B2) 25 to 75% by weight of the polyolefin B2), in particular LDPE and/or LLDPE,, 'B) 2 to 6% by weight of a polymer blend B), comprising'}C) 4.5 to 10.5% by weight of the elastomeric block copolymer C).18. The polymer blend according to claim 15 , comprising components A) claim 15 , B) claim 15 , and C) in the following amounts:A) 85 to 92.5% by weight of the impact modified styrenic polymer A), comprising a styrenic polymer and an impact modifying polymer, in particular HIPS; B1) 25 to 75% by weight of polyisobutylene B1), and', 'B2) 25 ...
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