摘要:
Biobased multifunctional cross-linking polyols that can be used in preparing polyesters and in polyurethane applications, and methods of making them are described.
摘要:
Compositions comprising 1,3-propanediol and an extraction product are provided, and the 1,3-propanediol in the composition is biologically derived. Also provided are processes for extracting an extract from a source. These processes comprise providing 1,3-propanediol and mixing the 1,3-propanediol with the source. This serves to extract the extract from the source into the 1,3-propanediol. The processes also include separating the source from the ester and extract.
摘要:
To provide a novel compound. It is disclosed a compound represented by following formula (I): A-L-{D 1 -(E)q-D 2 -(B) m -Z 1 -R} p . In the formula, A represents a p-valent chain or cyclic residue; L represents a single bond or a divalent linking group; p represents an integer of 2 or more; D 1 represents a carbonyl group (-C(=O)-) or a sulfonyl group (-S(=O) 2 -); D 2 represents a carbonyl group (-C(=O)-), a sulfonyl group (-S(=O) 2 -), a carboxyl group (-C(=O)O-), a sulfonyloxyl group (-S(=O) 2 O-), a carbamoyl group (-C(=O)N(Alk)-) or a sulfamoyl group (-S(=O) 2 N(Alk)-); E represents a divaltn group; and R represents a hydrogen atom, a substituted or non-substituted C 8 or longer alkyl group, a perfluoroalkyl group or a trialkylsilyl group.
摘要:
The invention provides a method of producing acrylic acid. The method includes contacting fumaric acid with a sufficient amount of ethylene in the presence of a cross-metathesis transformation catalyst to produce about two moles of acrylic acid per mole of fumaric acid. Also provided is an acrylate ester. The method includes contacting fumarate diester with a sufficient amount of ethylene in the presence of a cross-metathesis transformation catalyst to produce about two moles of acrylate ester per mole of fumarate diester. An integrated process for process for producing acrylic acid or acrylate ester is provided which couples bioproduction of fumaric acid with metathesis transformation. An acrylic acid and an acrylate ester production also is provided.
摘要:
The subject matter of the invention is a process for the production of metal salts of trifluoromethane sulphonic acid by reacting trifluoromethane sulphonic acid with a metal alcoholate and the use thereof as esterification catalyst and/or transesterification catalyst for the production of hydroxycarboxylic acid esters.
摘要:
The present invention relates to chain extenders, processes for their preparation and their use in the preparation of biocompatible biodegradable polyurethanes and polyurethane ureas for biomedical applications such as stents, scaffolds for tissue engineering. The chain extenders comprise a compound of formula (I)
摘要:
The invention is based on the discovery that certain polyester compounds bearing free-radical curable moieties are useful as b-stageable adhesives for the microelectonic packaging industry.
摘要:
The present invention relates to a process for preparing vinyl carboxylates by reacting a carboxylic acid with an alkyne compound in the presence of a catalyst which is selected from carbonyl complexes, halides and oxides of rhenium, of manganese, of tungsten, of molybdenum, of chromium and of iron and rhenium metal, at a temperature of
摘要:
The present invention relates to chain extenders, processes for their preparation and their use in the preparation of biocompatible biodegradable polyurethanes and polyurethane ureas for biomedical applications such as stents, scaffolds for tissue engineering. The chain extenders comprise a compound of formula (I)