Fire-protecting polyester resins
AssigneeFokker-VFW B.V.
InventorLeo M. Godfried
Life of this patent
Estimating the term…
Abstract
Polyester moulding compositions and polyester resins resulting therefrom are rendered fire-protecting by incorporating in the moulding composition a combination of three materials: a source of carbon, such as e.g. pentaerythritol, a source of phosphoric acid, such as e.g. ammonium polyphosphate, and a source of non-inflammable gases such as melamine-formaldehyde, in proportions of 5-20%, 20-40% and 5-20% by weight respectively, calculated on the total weight of this combination plus polyester and monomer.
Claims17
In a fire-protecting moulding composition, the combination of:
- 35 to 50% by weight of an unsaturated polyester and 5 to 10% by weight of an unsaturated monomer copolymerisable therewith, together with a mixture of fire-protecting additives to render the moulding composition, when set, intumescent, said mixture consisting of:
- 5 to 20% by weight of a source of carbon having a high temperature of decomposition and containing many radicals capable of entering into an esterifying reaction with phosphoric acid,
- 20 to 40% by weight of a source of phosphoric acid having a decomposition temperature lower than that of said source of carbon whereby said esterifying reaction may take place at said decomposition temperature, and
- 5 to 20% by weight of a source of non-inflammable gases, said source providing said gases at temperatures above the decomposition temperature of said phosphoric acid source, all percentages being calculated on the combined weight of polyester and monomer fire-protecting additives.
A moulding composition comprising about 30% by weight of unsaturated polyester and about 8% by weight of unsaturated monomer is combined with a mixture of about 14% by weight of a source of carbon, about 22% by weight of a source of phosphoric acid, and about 18% by weight of a source of non-inflammable gases.
A moulding composition comprising 25 to 40% by weight of chlorendic acid-based polyester and 5 to 10% by weight of unsaturated monomer are combined with five to twenty percent of carbon source 20 to 40% by weight of a source of phosphoric acid. 5 to 20% by weight of a substance selected from the group consisting of amines and amides, and 0-10% by weight of chlorinated aromatics.
A molded, polyester resin article essentially comprising:
- a molded and cured copolymerisation product of 35 to 50% by weight of an unsaturated polyester and 5 to 10% by weight of an unsaturated monomer copolymerisable therewith, said polyester resin article containing a mixture of fire-protecting additives to render the cured product intumescent, said mixture consisting of
- 5 to 20% by weight of a source of carbon having a high temperature of decomposition and containing many radicals capable of entering into an esterifying reaction with phosphoric acid,
- 20 to 40% by weight of a source of phosphoric acid having a decomposition temperature lower than that of said source of carbon whereby said esterifying reaction may take place at said decomposition temperature, and
- 5 to 20% by weight of a source of non-inflammable gases, said source providing said gases at temperatures above the decomposition temperature of said phosphoric acid source, all percentages being calculated on the combined weight of polyester and monomer and fire-protecting additives.
A molded, polyester resin article comprising about 30% by weight of unsaturated polyester and about 8% by weight of unsaturated monomer which is combined with a mixture of about 14% by weight of a source of carbon, about 22% by weight of a source of phosphoric acid, and about 18% by weight of a source of non-inflammable gases.
A molded, polyester resin article comprising 25 to 40% by weight of chlorendic acid-based polyester and 5 to 10% by weight of unsaturated monomer which are combined with five to twenty percent of carbon source, 20 to 40% by weight of a source of phosphoric acid, 5 to 20% by weight of a substance selected from the group consisting of amines and amides and 0 to 10% by weight of chlorinated aromatics.
Dependencies are inferred from the claim text.