Reinforced intumescent polymer
AssigneeABB Schweiz AG
InventorsSheng Zhong, Marius Rutkevicius
Life of this patent
Estimating the term…
Abstract
An intumescent polymer is provided for molding fire-retardant structures. Expandable graphite is mixed in a polymer matrix to form the intumescent polymer. The expandable graphite is treated with silane to improve the strength of the polymer. Other ingredients may also be included within the polymer, including an acid source, blowing agent, char forming agent, an inorganic filler and a cross-linking agent.
Claims16
An intumescent polymer comprising:
- a polymer matrix;
- and
- an expandable graphite mixed within the polymer matrix;
- wherein the expandable graphite is covalently bonded to a silane with a hydrolysis reaction,
- wherein the silane is an alkyl-silane comprising a side alkyl chain comprising 4 carbon atoms or more.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- and
- wherein the expandable graphite is covalently bonded to a silane,
- wherein the silane is a chlorosilane.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- and
- wherein the expandable graphite is covalently bonded to a silane,
- wherein the silane is non-covalently bonded to the polymer matrix.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- wherein the expandable graphite is covalently bonded to a silane, and
- wherein the silane is covalently bonded to the polymer matrix,
- wherein the silane is vinyl silane.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- and
- wherein the expandable graphite is covalently bonded to a silane,
- wherein the silane comprises amino groups, and the polymer matrix is a polar polymer matrix.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- wherein the expandable graphite is covalently bonded to a silane, and
- wherein the polymer matrix comprises between 20% and 70% of the intumescent polymer by mass and the expanded graphite with the silane comprises between 10% and 40% of the intumescent polymer by mass,
- wherein the polymer matrix comprises polyethylene, high-density polyethylene, polypropylene, polycarbonate, polyester, polyvinyl acetate, polyvinyl chloride, polyethers, polystyrene, poly(methyl methacrylate), polyamide, poly(ethylene terephthalate), poly(butylene terephthalate) or a copolymer thereof.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- and
- wherein the expandable graphite is covalently bonded to a silane,
- wherein the intumescent polymer further comprises an inorganic filler treated with the silane, the inorganic filler comprising glass fibers, carbon fibers, clays, chalk, kaolin clays, talc clays, fumed silica or mica.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- and
- wherein the expandable graphite is covalently bonded to a silane,
- wherein the expandable graphite is covalently bonded with the silane in a first compounding, and the expandable graphite with the silane is mixed with the polymer matrix in a second compounding.
An intumescent polymer comprising:
- a polymer matrix;
- an expandable graphite mixed within the polymer matrix;
- and
- wherein the expandable graphite is covalently bonded to a silane,
- wherein the intumescent polymer is injection molded, compression molded, transfer molded or potted.
Dependencies are inferred from the claim text.