公开(公告)号：US20220204743A1

公开(公告)日：2022-06-30

申请号：US17606991

申请日：2020-04-22

Applicant: HUTCHINSON

Inventor： Etienne DELEBECQ ,  Laina GUO

IPC: C08L23/32 ,  C09K3/10

Abstract: The invention relates in particular to a crosslinkable rubber composition and to a process for preparing same.
The composition is based on an elastomer, comprises a crosslinking system and a thermoplastic phase with melting point Tm dispersed as nodules, and comprises the product: a) of a melt reaction by thermomechanical working of the elastomer and other ingredients, apart from the system, then b) of mechanical working with prior addition of the system. According to the invention: the dimension of the nodules is between 10 nm and 10 pm, a) comprises heating the mixture up to a temperature >Tm maintained for a holding time, and the system comprises sulfur when the elastomer is unsaturated and said phase comprises saturated chains, and comprises a peroxide when the elastomer is saturated.

公开(公告)号：US20250129238A1

公开(公告)日：2025-04-24

申请号：US18718525

申请日：2022-12-13

Applicant: HUTCHINSON

Inventor： Etienne DELEBECQ ,  Florian FANNECHERE

IPC: C08L7/00 ,  C08J3/24 ,  C09K3/10

Abstract: The invention relates to a crosslinkable rubber composition (I) based on an elastomer and to the process for preparing same. The composition (I) comprises a crosslinking system and a thermoplastic phase which is dispersed into particles, having a melting point MP or softening point SP, a glass transition temperature Tg and optionally a crystallisation temperature Tc, the system comprising sulfur when the elastomer is unsaturated and the phase comprises saturated chains, and a peroxide when the elastomer is saturated, the composition (I) comprising the product of: a) a melt reaction by thermomechanical working of the elastomer and other ingredients except for the system, comprising heating the mixture to a maximum temperature Ta that is greater than MP or SP, then b) mechanical working of the mixture obtained, with addition of the system. The particles comprise filaments or fibrils, the temperature of the mixture during b) being temporarily greater than Tc when the phase is crystalline, or than Tg when it is amorphous.