Recycled butyl ionomers and recycling processes
AssigneeLANXESS Corporation
InventorsDana Adkinson, Rayner Krista, Kevin Kulbaba
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Abstract
The present invention relates to processes for recycling articles made from butyl ionomers and processes for producing recycled butyl ionomers. The invention further relates to composites comprising recycled butyl ionomers and fillers and articles made from recycled butyl ionomers. The invention also relates to uncured filled articles made from butyl ionomers having certain physical properties. Exemplary fillers include silica, carbon black, talc and clay, particularly onium substituted high aspect ratio nanoclays.
Claims59
A process for recycling a molded article comprising an uncured butyl ionomer material, the process comprising:
- a. converting the article to particles having an average size of at most 50 mm;
- b. heating the particles to a temperature of from 80 to 200° C.;
- c. exposing the particles to shear mixing conditions for at least 10 seconds;
- and,
- d. cooling the resulting mixture to ambient temperature.
A process for preparing a recycled butyl ionomer material, the process comprising:
- a. providing a non-recycled uncured butyl ionomer material having a ultimate tensile strength at ambient temperature;
- b. heating the butyl ionomer to a temperature of from 80 to 200° C.;
- c. exposing the butyl ionomer to shear mixing conditions for at least 10 seconds;
- and,
- d. cooling the butyl ionomer to ambient temperature to form the recycled butyl ionomer.
A thermo-reversible article made from an uncured filled butyl ionomer having a Mooney viscosity ML (1+8) @ 125° C. of at least 25 Mooney units and an ultimate tensile strength of at least 2 MPa.
A shaped article comprising a recycled butyl ionomer.
A composite comprising a recycled butyl ionomer and a filler.
An uncured, recyclable polymer composite comprising:
- a butyl ionomer comprising repeating units derived from at least one isoolefin monomer, repeating units derived from at least one multiolefin monomer, optionally at least one monomer copolymerizable with the isoolefin or multiolefin monomer, and at least one nitrogen or phosphorous based nucleophile;
- and, a filler incorporated with the butyl ionomer.
Dependencies are inferred from the claim text.