Hydrolysis resistant polyester films

A biaxially oriented polyester film including polyethylene terephthalate (PET) and at least one hydrolysis stabilizer selected from a glycidyl ester of a branched monocarboxylic acid, wherein the monocarboxylic acid has from 5 to 50 carbon atoms, wherein the hydrolysis stabilizer is present in the film in the form of its reaction product with at least some of the end-groups of the polyester; a process for making the same; and use of the film as a layer in a photovoltaic cell.

HYDROLYSIS RESISTANT POLYESTER FILMS

A biaxially oriented polyester film including polyethylene terephthalate (PET) and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid, wherein the monocarboxylic acid has from 5 to 50 carbon atoms, wherein the hydrolysis stabiliser is present in the film in the form of its reaction product with at least some of the end-groups of the polyester; a process for making the same; and use of the film as a layer in a photovoltaic cell. 1. A biaxially oriented polyester film comprising polyethylene terephthalate (PET) and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid , wherein the monocarboxylic acid has from 5 to 50 carbon atoms , wherein said hydrolysis stabiliser is present in the film in the form of its reaction product with at least some of the end-groups of said polyester.2. The polyester film according to wherein the intrinsic viscosity of the polyester in the polyester film is at least about 0.65.3. The polyester film according to wherein the hydrolysis stabiliser is present in an amount in the range from 0.1% to 2.0% claim 1 , relative to the total weight of the layer.4. The polyester film according to wherein the hydrolysis stabiliser(s) in the polyester film consist(s) essentially of at least one glycidyl ester of a branched monocarboxylic acid.5. The polyester film according to wherein said branched monocarboxylic acid has from 5 to 15 carbon atoms claim 1 , and/or wherein said branched monocarboxylic acid is saturated claim 1 , and/or said branched monocarboxylic acid is a synthetic material.6. The polyester film according to wherein said hydrolysis stabiliser is manufactured by the reaction of epichlorohydrin with said branched monocarboxylic acid.8. The polyester film according to wherein Ris selected from methyl claim 7 , and Rand Rare independently selected from alkyl claim 7 , wherein the total number of carbon atoms in the alkyl groups Rand Ris 7.9. The ...

Hydrolysis Resistant Polyester Films

A biaxially oriented polyester film comprising polyester and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid, wherein the monocarboxylic acid has from 5 to 50 carbon atoms, wherein said hydrolysis stabiliser is present in the film in the form of its reaction product with at least some of the end-groups of said polyester, and wherein said reaction product is obtained by the reaction of the hydrolysis stabiliser with the end-groups of the polyester in the presence of a metal cation selected from the group consisting of Group I and Group II metal cations. 1. A biaxially oriented polyester film comprising polyester and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid , wherein the monocarboxylic acid has from 5 to 50 carbon atoms , wherein said hydrolysis stabiliser is present in the film in the form of its reaction product with at least some of the end-groups of said polyester , and wherein said reaction product is obtained by the reaction of the hydrolysis stabiliser with the end-groups of the polyester in the presence of a metal cation selected from the group consisting of Group I and Group II metal cations.2. A biaxially oriented polyester film comprising polyester and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid , wherein the monocarboxylic acid has from 5 to 50 carbon atoms , wherein said hydrolysis stabiliser is present in the film in the form of its reaction product with at least some of the end-groups of said polyester , and wherein the polyester film further comprises a metal cation selected from the group consisting of Group I metal cations.3. The polyester film according to wherein the metal cations are selected from the group consisting of Group I metal cations.4. The polyester film according to claim 1 , wherein the metal cations are sodium cations.5. The polyester film according to claim 1 , wherein ...

POLYESTER FILM COMPRISING A POLYMERIC PHOSPHONATE FLAME RETARDANT

A polyester film comprising a polymeric phosphonate flame retardant in an amount of from about 1.0 to about 25.0 wt % by total weight of the film and further comprising at least one metal cation selected from the group consisting of Group I and Group II metal cations. 1. A polyester film comprising a polymeric phosphonate flame retardant in an amount of from about 1 to about 25 wt % , by total weight of the film , and further comprising at least one metal cation selected from the group consisting of sodium and potassium metal cations.2. A polyester film according to wherein the polyester film is oriented claim 1 , preferably a biaxially oriented film.3. A polyester film according to wherein the intrinsic viscosity of the film is at least about 0.70.4. A polyester film according to wherein the polyester film comprises said phosphonate flame retardant in an amount of at least about 5 wt % claim 1 , preferably at least about 10 wt % claim 1 , preferably at least about 12 wt % claim 1 , preferably no more than about 20 wt % claim 1 , preferably no more than about 18 wt % claim 1 , by total weight of the film.6. A polyester film according to wherein X is selected from Calkyl claim 5 , preferably Calkyl claim 5 , preferably Calkyl claim 5 , preferably methyl.7. A polyester film according to wherein —O—Ar—O— is derived from bisphenol A claim 5 , bisphenol F claim 5 , and 4 claim 5 ,4′-biphenol claim 5 , preferably bisphenol A.9. A polyester film according to wherein the weight average molecular weight (Mw) of the phosphonate flame retardant is in the range from about 10 claim 1 ,000 to about 120 claim 1 ,000 claim 1 , preferably from about 50 claim 1 ,000 to about 120 claim 1 ,000 claim 1 , preferably from about 80 claim 1 ,000 to about 120 claim 1 ,000 g/mol.10. A polyester film according to wherein the phosphonate flame retardant is characterized by a phosphorus content of at least about 5 wt % claim 1 , preferably at least about 8 wt % claim 1 , preferably at least ...

Hydrolysis resistant polyester film

The use of titanium dioxide particles coated by an organic coating for increasing the hydrolysis resistance of an oriented polyester film, particularly wherein the organic coating does not comprise or is not derived from a silane, and particularly wherein the organic coating is selected from an organophosphorus compound and a polymeric organic coating; and oriented polyester films comprising such titanium dioxide particles coated byan organic coating; and photovoltaic cells comprising such films.

HYDROLYSIS RESISTANT POLYESTER FILMS

A biaxially oriented polyester film comprising polyester and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid, wherein the monocarboxylic acid has from 5 to 50 carbon atoms, wherein said hydrolysis stabiliser is present in the film in the form of its reaction product with at least some of the end-groups of said polyester, and wherein said reaction product is obtained by the reaction of the hydrolysis stabiliser with the end-groups of the polyester in the presence of a metal cation selected from the group consisting of Group I and Group II metal cations. 1. A process for the manufacture of a biaxially oriented polyester film , wherein the process comprises:(i) extruding a layer of molten polyester and at least one hydrolysis stabiliser selected from a glycidyl ester of a branched monocarboxylic acid, wherein the monocarboxylic acid has from 5 to 50 carbon atoms, wherein said hydrolysis stabiliser is present in the extrudate in the form of its reaction product with at least some of the end-groups of said polyester, and wherein said reaction product is obtained by reaction of the hydrolysis stabiliser with the end-groups of the polyester in the presence of a metal cation selected from the group consisting of Group I and Group II metal cations, wherein the extrusion temperature is within the range of from about 280 to about 300° C.;(ii) quenching the extrudate;(iii) stretching the quenched extrudate in two mutually perpendicular directions to effect orientation; and(iv) heat-setting the film.2. The process according to claim 1 , wherein the metal cation is selected from the group consisting of Group I metal cations.3. The process according to claim 1 , wherein said polyester is polyethylene terephthalate.4. The process according to claim 1 , wherein the process comprises the further step of manufacturing said hydrolysis stabiliser by reaction of epichlorohydrin with said branched monocarboxylic acid.5. The process ...

POLYESTER FILM COMPRISING AMORPHOUS POLYESTER

A photovoltaic cell comprising a transparent front-plane, an opaque back-plane and an encapsulant resin wherein said back-plane comprises a polyester film comprising a base layer (B) comprising a crystallisable polyester and a heat-sealable layer (A) comprising an amorphous copolyester wherein: (i) said amorphous copolyester is derived from an aliphatic diol and a cycloaliphatic diol and at least one aromatic dicarboxylic acid (ii) said polyester film is disposed in the photovoltaic cell such that layer (A) is in contact with the encapsulant resin. 1. A photovoltaic cell comprising a transparent front-plane , an opaque back-plane and an encapsulant resin wherein said back-plane comprises a polyester film comprising a base layer (B) comprising a crystallisable polyester and a heat-sealable layer (A) comprising an amorphous copolyester wherein:(i) said amorphous copolyester is derived from an aliphatic diol and a cycloaliphatic diol and at least one aromatic dicarboxylic acid(ii) said polyester film is disposed in the photovoltaic cell such that layer (A) is in contact with the encapsulant resin.2. (canceled)3. The photovoltaic cell according to wherein said base layer (B) comprises at least one hydrolysis stabiliser and/or at least one UV-stabiliser.4. The photovoltaic cell according to wherein said layer (A) comprises at least one UV-stabiliser and optionally at least one hydrolysis stabiliser.5. The photovoltaic cell according to wherein said layer (B) comprises an opacifying agent.6. The photovoltaic cell according to wherein said base layer (B) is the outermost layer of the photovoltaic cell.7. The photovoltaic cell according to wherein said base layer (B) comprises at least one hydrolysis stabiliser and at least one UV-stabiliser.8. The photovoltaic cell according to wherein said layer (A) comprises no or substantially no hydrolysis stabiliser and/or no or substantially no UV-stabiliser.9. The photovoltaic cell according to wherein layer (A) is free of ...

Filmpolymer

Polymeric film

A polymeric film comprising a polyester film substrate comprising 0.1% to 10% by weight, relative to the weight of the polyester, of at least one UV absorber, and a heat sealable layer, wherein the substrate is a multilayer film having an outer substrate layer and an inner substrate layer, the inner substrate layer comprising 1% to 40% by weight of UV absorber, relative to the amount of UV absorber present in the outer substrate layer. The film is particularly suitable for use as a protective layer on a metal sheet.

Hydrolysis resistant polyester films

A biaxially oriented polyester film comprising polyester and at least one hydrolysis stabilizer selected from a glycidyl ester of a branched monocarboxylic acid, wherein the monocarboxylic acid has from 5 to 50 carbon atoms, wherein said hydrolysis stabilizer is present in the film in the form of its reaction product with at least some of the end-groups of said polyester, and wherein said reaction product is obtained by the reaction of the hydrolysis stabilizer with the end-groups of the polyester in the presence of a metal cation selected from the group consisting of Group I and Group II metal cations.

PLASTIC FILM

Polymeric film

A polymeric film has a polyester film substrate (1) containing in the range from 0.1 to 10 % by weight, relative to the weight of the polyester, of at least one UV absorber, and a heat-sealable layer (2) on a surface of the substrate. The film is particularly suitable for use as a protective layer on a metal sheet (6).

Polymeric film

A primer useful in the preparation of an anti fouling surface contains (I) a copolymer formed from acrylates, free carboxyl group containing monomer and an aromatic sulfonic acid or salt, an acrylic polymeric resin and a cross-linking agent.

Polyester film comprising a polymeric phosphonate flame retardant

A polyester film comprising a polymeric phosphonate flame retardant in an amount of from about 1.0 to about 25.0 wt% by total weight of the film and further comprising at least one metal cation selected from the group consisting of Group I and Group II metal cations.

Hydrolysis resistant polyester films.

Se describe una película de poliéster biaxialmente orientada que comprende tereftalato de polietileno (PET) y al menos un estabilizador de la hidrólisis seleccionado de un éster de glicidilo de un ácido monocarboxílico ramificado, en donde el ácido monocarboxílico tiene de 5 a 50 átomos de carbono, en donde el estabilizador de la hidrólisis está presente en la película en la forma de su producto de reacción con al menos algunos de los grupos extremos de poliéster; un proceso para elaboración del mismo; y el uso de la película como una capa en celda fotovoltaica.

Polymeric film

A primer useful in the preparation of an anti-fouling surface contains (I) a copolymer formed from acrylates, free carboxyl group containing monomer and an aromatic sulfonic acid or salt, an acrylic polymeric resin and a cross-linking agent.

Filmpolymer

Polyester film comprising a polymeric phosphonate flame retardant

A polyester film comprising a polymeric phosphonate flame retardant in an amount of from about 1.0 to about 25.0 wt % by total weight of the film and further comprising at least one metal cation selected from the group consisting of Group I and Group II metal cations.

Polyester film comprising amorphous polyester

A photovoltaic cell comprising a transparent front-plane, an opaque back-plane and an encapsulant resin wherein said back-plane comprises a polyester film comprising a base layer (B) comprising a crystallisable polyester and a heat-sealable layer (A) comprising an amorphous copolyester wherein: (i) said amorphous copolyester is derived from an aliphatic diol and a cycloaliphatic diol and at least one aromatic dicarboxylic acid (ii) said polyester film is disposed in the photovoltaic cell such that layer (A) is in contact with the encapsulant resin.