Arkema Patent

The invention relates to a composition comprising:- a silylated polymer, and- a composite filler comprising calcium carbonate and silica.The invention also relates to a method for bonding substrates implementing the composition according to the invention.The invention further relates to an article comprising the composition according to the invention.Finally, the invention relates to the use of the composition according to the invention.

The present invention relates to a hot melt pressure sensitive adhesive composition comprising: - at least one styrenic block polymeric component; - at least one tackifying resin; - at least one plasticizer; - at least one silica; wherein the content of polycyclic aromatic hydrocarbon is lower than or equal to 200 ppm.

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 present invention relates to a hot melt adhesive composition comprising: - a polyolefin PO1 having a melt index greater than 500 g/10 min at 190°C, an enthalpy of crystallization greater than 40 J/g, and a melting point lower than 80°C; - a polyolefin PO2 having an enthalpy of crystallization lower than 30 J/g, and a weight average molecular weight (Mw) greater than or equal to 10 000 g/mol; - a tackifier; - an amorphous polyolefin PO3 having a weight average molecular weight (Mw) ranging from 500 to 8 000 g/mol.

The present invention relates to a reactive polyurethane hot melt adhesive composition prepared by a first raw material comprising: component (1) an isocyanate-terminated prepolymer E1 comprising a first reaction product of a polyol with a polyisocyanate D1; and component (2), which is either component (2-1): a polyether polyol A2, a polyester polyol B2, a thermoplastic resin C2, and a polyisocyanate D2, or component (2-2): an isocyanate-terminated prepolymer E2, which is different from the isocyanate-terminated prepolymer E1. The invention also relates to a process for preparing the reactive polyurethane hot melt adhesive composition, an article comprising the same, and use. The adhesive layer formed by the reactive polyurethane hot melt adhesive composition of the present invention has excellent creep resistance.

L'invention concerne le difluorure de vinylidène biosourcé. L'invention concerne également des procédés de préparation du difluorure de vinylidène biosourcé à partir de diverses matières premières renouvelables. L'invention concerne aussi les homopolymères de difluorure de vinylidène obtenus par polymérisation dudit monomère, ainsi que les copolymères obtenus par copolymérisation dudit monomère avec un ou plusieurs co-monomères compatibles. L'invention se rapporte enfin à l'utilisation desdits homopolymères ou copolymères dans des applications telles que le génie chimique ou l'électronique, notamment des appareils électroniques grand public.

The present invention relates to a process of preparation of a compound having formula (I): R<1>-C(=O)-O-CH<2>-O-C(=O)-R<2> (I) wherein R<1> and R<2> represent, independently of each other, an alkyl, a cycloalkyl or an aryl group, said alkyl, cycloalkyl or aryl group being optionally substituted; said process comprising a step i) of reacting: ∘ a compound A selected from the group consisting of: trioxane, polyoxymethylene deprived of hydroxyl end groups; ∘ a compound of formula (II): R<1>-C(=O)-O-C(=O)-R<2> (II) and ∘ a perfluorosulfonic acid; wherein step i) is carried out at a temperature T1 of at least 50°C, wherein the molar ratio of compound of formula (II) : compound A ranges from 1 : 1 to 1.2 : 1.

The present invention relates to a pressure sensitive hot melt adhesive, particularly to a pressure sensitive hot melt positioning adhesive for use on feminine sanitary pads or adult incontinent products having improved peel values on fabrics made from Lyocell fibers, particularly eucalyptus-based Lyocell fibers.

The invention relates to a hot melt pressure sensitive adhesive composition comprising:- at least one styrene block copolymer,- at least one tackifying resin, and- a plasticizer comprising at least one alkylated naphthalene.Furthermore, the invention relates to an article comprising the hot melt pressure sensitive adhesive composition according to the invention.Finally, the invention relates to the use of the hot melt pressure sensitive adhesive composition according to the invention.

The present invention relates to a process of preparation of a compound having formula (I): R¹-C(=O)-O-CH₂-O-C(=O)-R² (I)wherein R¹ and R² represent, independently of each other, an alkyl, a cycloalkyl or an aryl group, said alkyl, cycloalkyl or aryl group being optionally substituted;said process comprising a step i) of reacting:∘ a compound A selected from the group consisting of: trioxane, polyoxymethylene deprived of hydroxyl end groups;∘ a compound of formula (II): R¹-C(=O)-O-C(=O)-R² (II)and∘ a perfluorosulfonic acid;wherein step i) is carried out at a temperature T1 of at least 50°C,wherein the molar ratio of compound of formula (II) : compound A ranges from 1 : 1 to 1.2 : 1.