Flame-retardant polymer composition
AssigneeBategu Gummitechnologie GmbH
InventorGerhard Mestan
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Abstract
The invention relates to a flame-proofed polymeric composition suitable for coating workpieces, containing a vinyl acetate-containing thermoplastic polymer and an unsaturated elastomer containing double bonds as polymeric components, wherein the polymeric components are present in the form of a homogeneous polymeric mixture, and a mixture matrix vulcanized exclusively by a sulphur or sulphur-containing crosslinking system is formed, wherein the sulphur crosslinking system extends across the entire matrix and permeates the matrix completely, and—at least one flame retardant or a combination of flame retardants. The invention further relates to articles produced therefrom, and to composite elements coated with this composition and to a method for producing the same.
Claims61
A flame-resistant polymer composition, comprising:
- a thermoplastic polymer containing vinyl acetate;
- an unsaturated elastomer containing double bonds;
- and
- at least one flame retardant or a combination of flame retardants, said thermoplastic polymer and said unsaturated elastomer intermixed to form a homogenous mixture, said homogenous mixture vulcanised exclusively with sulphur or a sulphur-containing crosslinking agent so that a continuous system of sulphur crosslinks extends uninterruptedly through an entirety of the mixture.
A method for producing a flame-resistant composition, comprising the steps in the order of:
- mixing a thermoplastic polymer containing vinyl acetate, an unsaturated elastomer, a crosslinking agent, a flame retardant, and additives and excipients into a homogeneous mixture whilst avoiding crosslinking and/or vulcanisation,
- moulding the mixture, and
- vulcanizing the mixture during or at the end of moulding, as a static, non-dynamic vulcanisation that avoids shearing exclusively with sulphur or a sulphur-containing crosslinking agent so that a continuous system of sulphur crosslinks extends uninterruptedly through an entirety of the mixture.
A flame-retardant article comprising a composition comprising a thermoplastic polymer containing vinyl acetate, an unsaturated elastomer containing double bonds, and at least one flame retardant or a combination of flame retardants, said thermoplastic polymer and said unsaturated elastomer intermixed to form a homogenous mixture, said homogenous mixture vulcanised exclusively with sulphur or a sulphur-containing crosslinking agent so that a continuous system of sulphur crosslinks extends uninterruptedly through an entirety of the mixture.
Dependencies are inferred from the claim text.