Mohamed Sidqi

Bio: Mohamed Sidqi is an academic researcher from Clariant. The author has contributed to research in topics: Polyamide & Isopropyl. The author has an hindex of 3, co-authored 9 publications receiving 47 citations.

Synergistic polyamide stabilization method

Abstract: A use for synergistic additives for polyamides is disclosed by forming a uniform and intimate mixture with polyamide with a component system selected from (I) (II) or (III) (on a weight basis) where (I) is from 0.01% to 1% of a sterically hindered phenyl phosphonite (Ia) with from 0.05% to 5% of a non-hydroxyl substituted oxanilide(Ib) (together 1a+1b), or Ia together with an aromatic di-carbonyl compound containing two hindered amine moieties (together Ia+c). Preferably the weight ratio of Ia to Ib and Ia to Ic is from 1:3 to 1:10, more preferably 1:4, 1:5 or 1:6 and most preferably 1:5; and (II) is from 0.05 to 5% of a non-hydroxyl substituted oxanilide containing at least two hindered amine groups (a) together with from 0.05 to 5% of the aromatic di-carbonyl compound (b), (II a+b), or (III) from 0.01% to 1% of a sterically hindered phenyl phosphonite, from 0.05 to 5% of a non-hydroxyl substituted oxanilide, and from 0.05 to 5% of an aromatic di-carbonyl compound. There are specified preferred weight ratio of (a) to (b), (a) to (c). Disclosed are articles of manufacture containing organic dye, and absent metallized chromium dye which are useful for molded articles, extruded articles or fibers of polyamide exhibiting outstanding color brightness and color stability.

Pigment for warpage-free polyolefins coloration

Abstract: Use of a pigment of formula (I) where both R are Cl or COOCH3 for the coloration of polyolefins which do not warp.

Synergistic additive system for the stabilization of polyamides

Abstract: Disclosed is a process for stabilizing polyamides against the damage effected by light, heat and/or oxidation while improving the differential dyeability, and processing stability therefore, comprising incorporating therein by melt-processing a synergistic additive system resulting in a uniform and intimate mixture with said polyamide, said additive system is selected from the group consisting of (I), (II) and (III) (I) is from 0.01% to 1% by weight of a sterically hindered phenylphosphonite (Ia) with from 0.05% to 5% by weight of oxanilide (Ib) or said (Ia) together with from 0.05% to 5% by weight of an aromatic di- or tri-carbonyl compound containing at least one, and preferably two hindered amine moieties (Ic); (II) is from 0.05% to 5% by weight of oxanilide (IIa) together with from 0.05% to 5% by weight of a aromatic di- or tri-carbonyl compound (IIb) containing at least one hindered amine moieties; (III) is from 0.01% to 1% by weight of a sterically hindered phenyl phosphonite (Ia), from 0.05% to 5% by weight of a oxanilide (Ib) and from 0.05% to 5% by weight of an aromatic di- or tri-carbonyl compound; wherein the percentages represent grams of additives used per hundred grams of polymer. Also disclosed are polyamide articles selected from the group consisting of molded articles, extruded articles and fibers, which optionally contain organic dyes, exhibiting outstanding color brightness and color stability.

Development of Circularly Recyclable Low Melting Temperature Bicomponent Fibers toward a Sustainable Nonwoven Application

Abstract: Sustainable low melting temperature bicomponent polyester fibers that can be circularly recycled were developed. The potentially biobased poly(hexamethylene terephthalate) (PHT), acting as the low ...

Process for improved and controlled dyeability of polyamide-6 fibers

Abstract: The invention relates to a process for controlling and improving the dyeability and the dyeing process of polyamide-6 fibers. The process allows to adjust and to control the content of carboxylic end groups (CEG content) and therefore allows a better control of polyamide-6 fibers dyeability.

Flameproof agent-stabiliser-combination for thermoplastic polymers

Abstract: The invention relates to a novel flameproof agent-stabiliser-combination for thermoplastic polymers, containing, as component A 25 99.9 wt %. of a phosphinic acid salt of formula (I) and/or a diphosphinic acid salt of formula (II) and/or polymers thereof, wherein R , R are the same or different and represent C1-C6-alkyl, are linear or branched and/or represent aryl; R represents C1-C10-alkylene, are linear or branched, C6-C10-arylene, alkylarylene or arylalkylene; M represents Mg, Ca, AI, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na, K and/or a protoned nitrogenous base; m represents 1- 4; n represents 1 - 4; x represents 1 4, as component B 0 75 wt % of a synergist containing nitrogen or a phosphorous/nitrogen flameproof agent and as component C 0.1 50 wt % of a basic or amphoteric oxide, hydroxide, carbonate, silicate, borate, stannate, mixed oxide-hydroxide, oxide-hydroxide carbonate, hydroxide-silicate or hydroxide-borate or mixtures of said agents, whereby the total of the components always amounts to 100 %

Flame retardant and stabilizer combined for thermoplastics polymers

Abstract: The invention relates to a novel flame retardant and stabilizer combined, for thermoplastics, which comprises as component A, phosphinic or diphosphinic salts and/or polymers thereof, as component B, a nitrogen containing synergist or a phosphorous/nitrogen flame retardant, as component C, a basic or amphoteric oxide, hydroxide, carbonate, silicate, borate, stannate, mixed oxide/hydroxide, oxide/hydroxide/carbonate, hydroxide/silicate, hydroxide/borate or mixtures thereof, optionally as component D, a phosphonite or a phosphonite/phosphate mixture, optionally as component E, an ester or salt of montan wax 4, and as component F, an aromatic di- or tricarboxylic ester or aromatic di- or tricarboxamide, the entirety of the components always being 100%.

Acid pigment dispersants and pigment preparations

Abstract: The invention relates to pigment dispersants of the formula (I), and to pigment preparations including at least one organic pigment and at least one pigment disperant of the formula (I): wherein Q 1 , R 1 , R 2 , E + , G + , s and n are defined in the specification.

Fluorescent pigment composition

Abstract: Fluorescent yellow pigment compositions comprising less than 1% of Pigment Violet 19 or Pigment Yellow 192 and a polyamide. An article comprising said fluorescent yellow pigment composition.