Arkema

The present invention relates to a composition in powder form comprising a polymer P1 comprising recurring units derived from vinylidene fluoride and recurring units derived from a monomer M1 selected from the group consisting of hexafluoropropene, tetrafluoroethylene, chlorotrifluoroethylene, vinyl fluoride, pentafluoropropene, tetrafluoropropene, trifluoroethylene, 1,2-difluoroethylene and perfluoroalkyle vinyl ethers, perfluoro(1,3-dioxole), perfluoro(2,2-dimethyl-1,3-dioxole) (PDD), a monomer of formula CF₂=CFOCF₂CF(CF₃)OCF₂CF₂X wherein X is SO₂F, CO₂H, CH₂OH, CH₂OCN or CH₂OPO₃H; a monomer of formula CF₂=CFOCF₂CF₂SO₂F; a monomer of formula F(CF₂)nCH₂OCF=CF₂ wherein n is 1, 2, 3, 4 or 5; a monomer of formula R¹CH₂OCF=CF₂ wherein R¹ is hydrogen atom or F(CF₂)m and m is 1, 2, 3 or 4; a monomer of formula R²OCF=CH₂ wherein R² is F(CF₂)p et p is 1, 2, 3 or 4; perfluorobutylethylene (PFBE); trifluoropropene, hexafluoroisobutylene, perfluorobutylethylene, bromotrifluoroethylene, chlorofluoroethylene, chlorotrifluoropropene and 2-trifluorométhyl-3,3,3-trifluoro-1-propene or mixture thereof; characterized in that the particles of said polymer P1 have a Dv99 size distribution lower than 89 microns and a Dv10 size distribution greater than 1.5 microns and in that said polymer P1 has a melt viscosity lower than 15kP at 230°C and a shear rate of 100 s-1 measured according to ASTM D3835.

A copolymer comprising units derived from at least one fluorinated comonomer and at least one comonomer of formula (I): <img class="EMIRef" id="3d330197-b4a8-46d2-9339-73d9c95a19d1-ia01" /> wherein R<1>, R<2> and R<3> are individually selected from the group consisting of: hydrogen atoms; halogen atoms; carboxyl group; carboxylic acid groups; ether groups; thioether groups; amine groups; amide groups; sulfonimide groups; urethane groups; a phosphonic acid group; a sulfonic acid group; a sulfonyl fluoride group; linear, branched and cyclic alkyl groups with or without one or more substituents; aromatic groups with or without one or more substituents; linear, branched and cyclic alkenyl groups with or without one or more substituents; linear, branched and cyclic alkynyl groups with or without one or more substituents; the substituents being selected from halogen atoms; aromatic groups; heterocyclic groups; carboxylic acid-containing groups; amine-containing groups, amide-containing groups; urethane-containing groups; phosphonic acid-containing groups; sulfonic acid-containing groups; sulfonyl fluoride-containing groups; thioether-containing groups and ether-containing groups; wherein n is from 0 to 5, preferably from 0 to 3, even more preferably from 0 to 2. The invention also relates to a method for preparing the copolymer as well as a use of the copolymer as a coating agent or a membrane.

This invention pertains to a curable composition comprises at least one monomer having at least one (meth)acrylate end group, selected from the group consisting of (meth)acrylate esters of alcohols having at least seven consecutive carbon atoms, and alkoxylated derivatives thereof; optionally, a (meth)acrylate oligomer in an amount of at least 1 wt% and at most 40 wt% based on the weight of the composition other than E) the filler; at least one non-reactive diluent in an amount of at least about 5 wt% and at most 40 wt% based on the weight of the composition other than E) the filler; a free radical photoinitiator; and at least one filler in an amount of at least 30 vol% based on the total volume of the curable composition. This composition is suitable for use in the fabrication of articles, such as ceramic articles, including industrial, consumer and medical products and molds used for casting and thermoforming articles. This invention is also directed to a method for making an article comprises curing the composition then sintering it.

The invention relates to a composition comprising at least one copolymer comprising polyamide blocks and polyether blocks having a number average molecular weight of from 20 000 to 100 000 g/mol, preferably from 25 000 to 80 000g/mol and wherein the mass ratio of the polyamide blocks relative to the polyether blocks of the copolymer is more than 1; from 0.1 to 6.0 % by weight of expandable microspheres, based on the total weight of the composition; optionally at least one UV stabilizer and/or UV absorber; and optionally at least one additional thermoplastic polymer compatible with the at least one copolymer comprising polyamide blocks and polyether blocks.The invention also relates to a method for preparing such a composition, to an expanded composition obtainable from such a composition and to a method for producing said expanded composition.

The present invention relates to a translucent composition comprising : a) From 55 to 97.99% by weight, based on the total weight of the composition, of a semi-crystalline polyamide matrix comprising : - 45 to 99% by weight of a polyamide A based on the total weight of the matrix, wherein the C/N ratio of the polyamide A is greater than 6.5 - 1 to 55% by weight of a polyamide B based on the total weight of the polyamide matrix, wherein the C/N ratio of the polyamide A is greater than 6.5; polyamides A and B have, in absolute value, at least one difference in C/N ratios equal to | C/N ratio (A) - C/N ratio (B)| ≤ 3, the polyamide A comprising at least 45 mol of at least one unit comprising a number of carbon atoms between the amide functional groups (including the carbonyl of the amide) denoted C1, the polyamide B comprising at least 30 mol% of at least one unit comprising a number of carbon atoms between the amide functions (including the carbonyl of the amide) denoted C2, with at least one of the equations |C1-C2| ≤ 3 being fulfilled, if the polyamides A and B each comprise more than one C1 and/or more than one C2 ; b) from 2 to 25% by weight, preferably from 3 to 20%,based on the total weight of the composition, of short glass fibers; c) from 0.01 to 20% by weight, based on the total weight of the composition, of acid modified polymer impact modifier comprising three or more blocks of polyamide.

The present invention relates to a redshifted benzophenone photoinitiator, to a process for preparing said photoinitiator. The present invention further relates to a photoinitiator composition, to a curable composition, to a process for the preparation of a cured product, to a process of inkjet printing, to a process of 3D printing and to a process for coating a nail. The invention also relates to the use of the photoinitiator or the photoinitiator composition.

The invention relates to a composition comprising at least one thermoplastic polyamide, wherein the average carbon content of the repeating units of said at least one thermoplastic polyamide is greater than or equal to 7; from 0.1 to 6.0 % by weight of expandable microspheres, based on the total weight of the composition; and optionally at least one additional thermoplastic polymer; wherein the composition has a melt flow index lower than or equal to 150 g/10 min. The invention also relates to a method for preparing such a composition, to an expanded composition obtainable from such a composition and to a method for producing said expanded composition.

The present invention relates to a translucent composition comprising : a) From 55 to 97.99% by weight, based on the total weight of the composition, of a semi-crystalline polyamide matrix comprising : - 45 to 99% by weight of a polyamide A based on the total weight of the matrix, wherein the C/N ratio of the polyamide A is greater than 6.5 - 1 to 55% by weight of a polyamide B based on the total weight of the polyamide matrix, wherein the C/N ratio of the polyamide A is greater than 6.5; polyamides A and B have, in absolute value, at least one difference in C/N ratios equal to | C/N ratio (A) - C/N ratio (B)| ≤ 3, the polyamide A comprising at least 45 mol of at least one unit comprising a number of carbon atoms between the amide functional groups (including the carbonyl of the amide) denoted C1, the polyamide B comprising at least 30 mol% of at least one unit comprising a number of carbon atoms between the amide functions (including the carbonyl of the amide) denoted C2, with at least one of the equations |C1-C2| ≤ 3 being fulfilled, if the polyamides A and B each comprise more than one C1 and/or more than one C2 ; b) from 2 to 25% by weight, preferably from 3 to 20%,based on the total weight of the composition, of short glass fibers; c) from 0.01 to 20% by weight, based on the total weight of the composition, of acid modified polymer impact modifier comprising three or more blocks of polyamide.

A method of adhering substrate surfaces to one another comprises applying a laminating adhesive to one of the surfaces and contacting the surfaces with one another. The laminating adhesive may be food grade compliant and compostable. The laminating adhesive comprises a blend of a sulfonated copolyester dispersion and a water soluble crosslinker, preferably the water soluble crosslinker comprises at least one of a polyfunctional isocyanate having a functionality of at least about 2.0, preferably at least about 2.2, more preferably at least about 2.5, further preferably more than about 2.7, even further preferably at least about 2.9 and most preferably at least about 3.0, a polyfunctional epoxy having a functionality of at least about 2.0, preferably at least about 2.2, more preferably at least about 2.5, further preferably more than about 2.7, even further preferably at least about 2.9 and most preferably at least about 3.0 and combinations thereof.

The present invention relates to a translucent composition comprising :a) From 60 to 98% by weight, based on the total weight of the composition, of a semi-crystalline polyamide matrix comprising :- 45 to 99% by weight of a polyamide A based on the total weight of the matrix, wherein the C/N ratio of the polyamide A is greater than 6.5- 1 to 55% by weight of a polyamide B based on the total weight of the polyamide matrix, wherein the C/N ratio of the polyamide A is greater than 6.5;polyamides A and B have, in absolute value, at least one difference in C/N ratios equal to | C/N ratio (A) - C/N ratio (B)| ≤ 3,the polyamide A comprising at least 45 mol of at least one unit comprising a number of carbon atoms between the amide functional groups (including the carbonyl of the amide) denoted C1,the polyamide B comprising at least 30 mol% of at least one unit comprising a number of carbon atoms between the amide functions (including the carbonyl of the amide) denoted C2,with at least one of the equations lC1-C2| ≤ 3 being fulfilled, if the polyamides A and B each comprise more than one C1 and/or more than one C2 ;b) from 2 to 25% by weight, preferably from 3 to 20%,based on the total weight of the composition, of short glass fibers chosen among :- E glass fiber based on the total weight of the glass fiber;- NE glass fiber based on the total weight of the glass fiber; and their mixtures.