中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

28 records (took 0.025 seconds)

    6.
    发明专利
    未知

    公开(公告)号：FR2856692B1

    公开(公告)日：2005-08-05

    申请号：FR0307719

    申请日：2003-06-26

    Applicant: RHODIA POLYAMIDE INTERMEDIATES

    Inventor： HELFT MATTHIEU ,  ROCHE ERIC

    IPC: C08G69/04 ,  C08G69/28 ,  C08J3/14

    Abstract: Spherical polyamide particles having a mean particle size of less than 1 mm, notably less than 100 μm, are produced by dispersing the polyamide monomers in an inert liquid and then polymerizing same.

    Preparing expanded-nylon polymer bead for use e.g. in expanded concrete, extrudes molten polymer containing expansion agent through die, cools and cuts
    7.
    发明专利
    Preparing expanded-nylon polymer bead for use e.g. in expanded concrete, extrudes molten polymer containing expansion agent through die, cools and cuts 未知

    公开(公告)号：FR2856950A1

    公开(公告)日：2005-01-07

    申请号：FR0308210

    申请日：2003-07-04

    Applicant: RHODIA POLYAMIDE INTERMEDIATES

    Inventor： BRIOIS JEAN FRANCOIS ,  ESTUR JEAN FRANCOIS ,  ROCHE ERIC

    IPC: B29C44/34 ,  B29C67/20 ,  B29B9/06 ,  B29C47/08

    Abstract: To cause expansion, a composition in a molten state, comprising a polymer with an expansion agent, is extruded through a die. The product is cooled and cut by a blade at the die outlet. The expansion agent is a gas dispersing or dissolving in the molten polymer. It is pore-forming. It is a volatile compound able to dissolve in the molten polymer. It is a chemical compound able to react chemically with the polymer through heating, generating a gas. The expansible composition includes a nucleation agent and/or a surfactant and/or a plasticizer. The composition includes reinforcing additions, e.g. glass fiber, mat-forming agents, pigments, coloring agents, stabilizers against light and/or heat, bio-active agents, anti-soiling agents and/or antistatic agents. The bead is up to 10 mm in diameter, preferably 5 mm or less. The superficial density is 0.8 g/cm 3> or less, preferably 0.5 g/cm 3> or less and especially 0.3 g/m 3> or less. An independent claim is included for the corresponding polyamide bead.

Patent Agency Ranking