摘要:
The present invention relates to a bio-based glutaraldehyde compound and to the different non-fossil, natural raw material manufacture methods thereof. To prepare said compound, glycerol created by the methanolysis of vegetable oil or animal fat is used, leading after dehydration to acrolein that is caused to react with a vinyl/alkyl/ether as per a Diels-Alder cyclization reaction, followed by hydrolysis so as to obtain the bio-based glutaraldehyde of the invention. Sugars containing five carbon atoms, that is, pentoses created from for example hemicellulose, may also be used, leading after dehydration to furfural, which leads, after complete hydrogenation followed by selective oxidation, to the bio-based glutaraldehyde of the invention.
摘要:
The invention relates to a process for synthesizing a nitrile-fatty acid (heminitrile) from unsaturated fatty acids, in the form of an acid or a simple ester or a “complex” ester of triglyceride type, which is first of all converted into an unsaturated fatty nitrile which is subjected to oxidative cleavage using H2O2 as oxidizing agent. This process can be used for preparing polyamide monomers, such as ω-amino acids or diamines or diacids equivalent to said heminitrile and for obtaining polyamides from raw materials which are of natural origin and from a renewable source.
摘要翻译:本发明涉及一种由酸或简单酯形式的不饱和脂肪酸或甘油三酯类“复合”酯形成的腈 - 脂肪酸(丁腈)的合成方法,其首先转化为不饱和脂肪酸 使用H 2 O 2作为氧化剂进行氧化裂解的脂肪腈。 该方法可用于制备聚酰胺单体,例如ω-氨基酸或与所述混合物相当的二胺或二酸,并用于从天然来源的原料和可再生来源获得聚酰胺。
摘要:
The invention relates to the field of plasticisers, compounds used as additives in polymers for facilitating the transformation thereof or modifying the mechanical properties thereof, especially rigidity.
摘要:
The subject matter of the invention is a process for synthesizing a saturated long-chain o.,0)-amino ester (acid) obtained in a first step by cross-metathesis between an acrylic first compound and a monounsaturated second compound comprising at least one nitrile, acid or ester trivalent function, one of these compounds comprising a nitrile function and the other an acid or ester function, in the presence of a ruthenium carbene metathesis catalyst, and in a second step by hydrogenation of the monounsaturated nitrile ester (acid) obtained in the presence of the metathesis catalyst of the preceding stop, acting as a hydrogenation catalyst.
摘要:
The invention concerns ligands with at least a fluorosilicone substituent of general formulae (I) and (II); a method for preparing them and their use for producing catalysts useful for olefin polymerisation
摘要:
A fuel composition containing, as a major portion, at least one fuel base, and, as a minor portion, at least one oxygenated compound, which contains at least 0.05% by weight of at least one trialkoxyalkane of the formula (I): ##STR1## wherein: X is a divalent hydrocarbon-containing group C.sub.n H.sub.2n, wherein n is 1, 2, or 3, each hydrogen atom optionally being substituted by a hydrocarbon-containing residue;R.sub.1, R'.sub.1, and R".sub.1 are each independently linear or branched alkyl groups containing from 1 to 10 carbon atoms and optionally at least one oxygen atom, two of each of R.sub.1, R'.sub.1 and R".sub.1 groups optionally being connected to form a heterocyclic ring containing 5 or 6 atoms; andR.sub.2 is a hydrogen atom or a linear C.sub.1 -C.sub.4 alkyl radical, or R.sub.2 and hydrocarbon-containing residue X, together by bonding, form a ring containing 5 or 6 carbon atoms.
摘要:
A process for synthesizing a long-chain saturated α,ω-amino ester (acid) including from 6 to 17 carbon atoms, said process including a first step of cross metathesis between a first acrylic compound chosen from acrylonitrile, acrylic acid or an acrylic ester and a second monounsaturated compound including at least one nitrile, acid or ester trivalent function, one of these compounds including a nitrile function and the other an acid or ester function, in the presence of a ruthenium carbene metathesis catalyst, and a second step of hydrogenation of the monounsaturated nitrile-ester (acid) obtained, wherein said monounsaturated compound including at least one nitrile, acid or ester trivalent function has previously been subjected to a purification by thermal and/or chemical treatment.
摘要:
The subject matter of the invention is a process for synthesizing a saturated long-chain α,ω-amino ester (acid) obtained in a first step by cross-metathesis between an acrylic first compound and a monounsaturated second compound comprising at least one nitrile, acid or ester trivalent function, one of these compounds comprising a nitrile function and the other an acid or ester function, in the presence of a ruthenium carbene metathesis catalyst, and in a second step by hydrogenation of the monounsaturated nitrile ester (acid) obtained in the presence of the metathesis catalyst of the preceding stop, acting as a hydrogenation catalyst.
摘要:
A compound includes at least one group Q and at least one group A linked together by at least one “spacer” group Sp, in which: group Q includes a dipole containing at least one nitrogen atom, preferably a nitrile oxide, nitrone, or nitrile imine function; group A contains at least one nitrogen atom, and is preferably an imidazolidinyl, ureyl, bis-ureyl, ureido-pyrimidyl, and triazolyl group; and Sp is an atom or a group of atoms forming a link between Q and A, preferably, a linear, branched or cyclic hydrocarbon-based optionally substituted chain, and may contain one or more aromatic radicals and/or heteroatoms. The compound may react with an unsaturated polymer forming a covalent bond with the polymer. The compound is useful for providing good interaction between fillers and polymers by establishing labile, non-covalent bonds between the polymer chains and the filler, thereby limiting processing problems.
摘要:
A shock absorber is prepared from a material formed from branched molecules comprising associative groups. The branched molecules each contains at least bifunctional fragments and at least trifunctional fragments joined together by ester or thioester bridges alone or in combination with amide or urea bridges.