Rhodia Operations

Rhodia Chimie

Specialty Operations France

Thierry Vidal

Massimo Guglieri

Rabih Rached

Laurent Saint-Jalmes

Jean-Christophe Castaing

Laurent Guy

Gérard Mignani

Zhiyun Chen

Virginie Pevere

Benoit Abribat

Pierre Marcel Ardaud

Nicolas Roques

Valerio Bramati

Olivier Jentzer

Marc Balastre

Clara Vernay

Samuel Arthaud

Samir Mansouri

Pierre Ardaud

A seed or seedling is coated with a cross-linked biopolymer and, optionally, a second binder selected from underivatized guar, cationic hydroxypropyl guar, polyacrylamide, poly(methacrylic acid), poly(acrylic acid), polyacrylate, poly(ethylene glycol), polyethyleneoxide, polyamide, hydroxypropyl guar, carboxymethyl guar, carboxymethylhydroxypropyl guar, underivatized starch, cationic starch, corn starch, wheat starch, rice starch, potato starch, tapioca, waxy maize,, waxy sarghum, sago, dextrin, chitin, chitosan, xanthan gum, carageenan gum, gum karaya, gum arabic, pectin, cellulose, hydroxycellulose, hydroxyalkyl cellulose, hydroxyethyl cellulose, carboxymethylhydroxyethyl cellulose, or hydroxypropyl cellulose. The seed coating composition is characterized by a dust value, as measured using a Heubach dustmeter device, which is lower by at least 30% as compared to an analogous composition that does not contain the crosslinked biopolymer.

Biopolymer-based seed coatings compositions and methods for use

The invention relates to a method for producing a (meth)acrylic anhydride A-C(&#x2550;O)&#x2014;O&#x2014;(O&#x2550;)C-A, comprising the following steps: a) a step of reacting an anhydride B&#x2014;C(&#x2550;O)&#x2014;O&#x2014;(O&#x2550;)C&#x2014;B with an acid A-COOH, resulting in the formation of mixed anhydride A-C(&#x2550;O)&#x2014;O&#x2014;(O&#x2550;)C&#x2014;B and acid B&#x2014;COOH; and b) a step of reacting the mixed anhydride with A-COOH, resulting in the (meth)acrylic anhydride. According to the invention, reaction steps (a) and (b) are carried out in the presence of hydrated triflic acid, and the anhydride A-C(&#x2550;O)&#x2014;O&#x2014;(O&#x2550;)C-A is isolated from the reaction medium produced in step (b) as follows: e1) heavy compounds having a volatility less than or equal to that of the anhydride A-C(&#x2550;O)&#x2014;O&#x2014;(O&#x2550;)C-A are separated from the reaction medium, said compounds including the anhydride and the hydrated triflic acid; e2) the anhydride is separated from the heavy compounds by difference in volatility.

Synthesis of (meth) acrylic anhydride by transanhydrization

The present disclosure relates to compositions comprising from 10 to 90 wt % of a mixture M of compounds A having formula RCONRR, wherein R, R, and Rare described herein, and from 10 to 90 wt % of at least one compound B selected from the amide solvents, optionally combined with an ester solvent, and methods for producing the same. The present disclosure further relates to phytosanitary formulations comprising such compositions.

Composition, method for producing the composition, and phytosanitary formulation containing same

The present invention concerns a process for preparing esteramide compounds. More particularly, the invention relates to a process for preparing esteramide compounds by reaction between a diester and an amine, in the presence of a basic compound, wherein the basic compound and the amine in gaseous form are co-added to the diester, the reaction being conducted at a temperature of 30&#xb0; C. or higher.

Process for preparing esteramide compounds

The present invention relates to a method for preparing esteramide compounds. More particularly, the invention relates to a method for preparing esteramide compounds by reaction between a diester and an amine, in the presence of a basic compound, wherein

The use of an esteramide compound, alone or as a mixture of the following formula (I):ROOC-A-CONRR&#x2003;&#x2003;(I) Also described, are applications for using the esteramide compound as a solvent, a co-solvent, a coalescence agent, a crystallization inhibitor, a plasticizer or an agent for increasing biological activity.

Uses of esteramide compounds

An esteramide compound of the following formula (I):ROOC-A-CONRR&#x2003;&#x2003;(I)is described, wherein: Also described, are applications for using the esteramide compound, notably as a solvent.

Esteramide compounds, methods for preparing same, and uses thereof

Novel ether-amide compounds are described. Uses of the compounds, in particular as solvents, for example in phytosanitary formulations are also described.

Ether-amide compounds and uses thereof

The use of a functionalized organosilicon compound as a coupling agent between an inorganic filler and an elastomer in an elastomer composition including an isoprene elastomer and a reinforcing inorganic filler is disclosed. The compound is selected among functionalized organosilicon compounds including at least one double bond C&#x2550;C or C&#x2550;N, and not including any C&#x2550;C&#x2014;C&#x2550;O bonds or N&#x2550;N bonds, and reacting with the isoprene units according to an electrocyclic reaction, in particular according to a standard cycloaddition reaction [2+1], [2+2], [3+2] or a Diels-Alder reaction [4+2] or an ene-synthesis reaction other than an ene-synthesis reaction between an isoprene unit and a C&#x2550;C&#x2014;C&#x2550;O or N&#x2550;N function. Also described, are elastomer composition(s) obtained and items manufactured using such compositions.

Use of a specific functionalised organosilicon compound as a coupling agent in an isoprene elastomer composition including a reinforcing inorganic filler

Organomonoalkoxy/monohydroxy silanes, particularly halogenated or aklenylated organomonoalkoxy (or monohydroxy) silanes, which are useful intermediates in organic syntheses, are prepared by reacting an alkoxysilane with an organometallic compound suited for substituting at least certain of the alkoxy functions of the alkoxysilane with a monovalent hydrocarbon radical other than alkoxy and co-preparing a metallic alkoxylate by-product capable of denaturing the substituted silanes thus obtained, including contacting the metallic alkoxylate with at least one agent (A) reactive with the alkoxy functions of the alkoxylate to generate one or more species inert relative to the alkoxysilane, such agent (A) being selected from among the electrophile and/or mineral acid groups.

Preparation of organomonoalkoxy (or monohydroxy) silanes from alkoxysilanes/organometallic compounds

At least one (poly)thio alkoxy and/or halosilane is/are prepared by reaction of at least one sulfur-containing reagent with at least one alkoxy and/or halosilane, wherein an ionic addition of a sulfur-containing reagent to an alkoxy and/or halosilane is preferably conducted with thermal and/or actinic activation; the novel polythio alkoxy and/or halosilanes of formula (III.2) thus prepared are particularly useful as coupling agents in elastomeric compositions containing a white filler of the silica type and having the formula (III.2) wherein, for example, Rand R=methyl and R=ethoxy.

Preparation of alkoxy- and/or halosilane (poly)sulfides and coupling agents comprised thereof

The invention relates to a method for preparing a fluorinated and silylated derivative having a bond between the bearing carbon of at least one fluorine and one silicon. This method comprises at least one step during which a derivative of formula (I) Rf&#x2014;CO&#x2014;O-D, in which D is selected among silylated radicals, is placed in the presence of a base. The inventive method is used for synthesizing fluorinated derivatives.

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Lyons, France

Thierry Vidal