Polysulfide compositions having a polyether synergist are disclosed. Polysulfide compositions that contain polyether synergists exhibit a rapid onset of cure and have acceptable final properties. The polysulfide compositions can be used as sealants.

Polysulfide compositions having a polyether synergist are disclosed. Polysulfide compositions that contain polyether synergists exhibit a rapid onset of cure and have acceptable final properties. The polysulfide compositions can be used as sealants.

The invention provides a stabilising composition for a polyol and/or a polyurethane, comprising: a) a first derivatised phenolic antioxidant having a molecular weight of at least about 400 g/mol and a melting point of less than about 100° C.; b) a second derivatised phenolic antioxidant having lower steric hindrance than the first derivatised phenolic antioxidant, which is a solid at ambient conditions; and c) a secondary antioxidant comprising a phosphite and/or a thioester,
and also disclosed is a fire retardant blend comprising the stabilising composition and a fire retardant.

The invention provides a stabilising composition for a polyol and/or a polyurethane, comprising: a) a first derivatised phenolic antioxidant having a molecular weight of at least about 400 g/mol and a melting point of less than about 100° C.; b) a second derivatised phenolic antioxidant having lower steric hindrance than the first derivatised phenolic antioxidant, which is a solid at ambient conditions; and c) a secondary antioxidant comprising a phosphite and/or a thioester,
and also disclosed is a fire retardant blend comprising the stabilising composition and a fire retardant.

A moisture-curable curable composition includes a perfluoro(poly)ether group-containing silane compound (a1) represented by formula (I); a perfluoro(poly)ether group-containing silane compound (a2) represented by formula (II) (in each formula, the definition of each group is as defined in the specification); (b) an organic silicon compound having at least two OR.sup.2 groups (here, R.sup.2s are each independently a hydrogen atom or a monovalent organic group at each appearance) bonded to Si atom or a partially hydrolyzed condensate thereof; and (c) a condensation catalyst.

A moisture-curable curable composition includes a perfluoro(poly)ether group-containing silane compound (a1) represented by formula (I); a perfluoro(poly)ether group-containing silane compound (a2) represented by formula (II) (in each formula, the definition of each group is as defined in the specification); (b) an organic silicon compound having at least two OR.sup.2 groups (here, R.sup.2s are each independently a hydrogen atom or a monovalent organic group at each appearance) bonded to Si atom or a partially hydrolyzed condensate thereof; and (c) a condensation catalyst.

A powder with a volume-weighted particle size distribution, with a median diameter D50 ranging from 40 to 120 micrometers, including at least one polyaryl ether ketone and at least one filler, in which: said at least one polyaryl ether ketone forms a matrix incorporating, at least partly, said at least one filler, and said filler has a Stokes equivalent spherical diameter distribution with a median diameter d′50 of less than or equal to 5 micrometers. Also a powder manufacturing process and the use thereof in a process for the layer-by-layer construction of objects by electromagnetic radiation-mediated sintering.

A powder with a volume-weighted particle size distribution, with a median diameter D50 ranging from 40 to 120 micrometers, including at least one polyaryl ether ketone and at least one filler, in which: said at least one polyaryl ether ketone forms a matrix incorporating, at least partly, said at least one filler, and said filler has a Stokes equivalent spherical diameter distribution with a median diameter d′50 of less than or equal to 5 micrometers. Also a powder manufacturing process and the use thereof in a process for the layer-by-layer construction of objects by electromagnetic radiation-mediated sintering.

An article (e.g. film, tape or pipe) is described comprising a microstructured surface. The microstructured surface comprises a thermoplastic polymer; and a block copolymer additive comprising a poly(alkylene)oxide block having a molecular weight greater than 250 or 500 g/mole and at least one hydrophobic block. Also described is a method of making such articles. Also described is a triblock copolymer comprising a poly(alkylene oxide) midblock and hydrocarbon end blocks; and compositions comprising a thermoplastic polymer and un to 50 wt. % of the block copolymer.

A resin composition includes 100 parts by weight of an unsaturated C═C double bond-containing polyphenylene ether resin; 15 parts by weight to 40 parts by weight of a hydrogenated styrene-butadiene-styrene triblock copolymer; 1 part by weight to 20 parts by weight of a compound of Formula (1); and 0.001 part by weight to 0.5 part by weight of a compound of Formula (2), a compound of Formula (3), a compound of Formula (4) or a combination thereof. Moreover, an article may be made from the resin composition, including a prepreg, a resin film, a laminate or a printed circuit board.

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