A method of stabilizing imino-functional silane involving adding thereto at least one Brønsted-Lowry base to inhibit, suppress or prevent the addition reactions of the imino-functional silane with itself to form a imino- and amino-functional silane and the subsequent deamination reactions to form conjugated carbon-carbon double bond-containing imino-functional silanes and stabilized imino-functional silanes containing the at least one Brønsted-Lowry base.
Hydrogen bonds involving polar CH groups. Part 8. The synthesis and X-ray crystal structure of 2-(2,2-dimethyl-3-piperidinopropyl)-1,3-dithian 1,1,3,3-tetraoxide; a sterically crowded cyclic disulphone
作者:Chuen Li、Michael P. Sammes、Richard L. Harlow
DOI:10.1039/p19830001299
日期:——
dithioacetal (10), which is reduced to a dithioacetal (11) with trimethylsilane in trifluoroacetic acid, and oxidised to the title compound (2) with potassium permanganate in acetic acid. The advantages of trimethylsilane as a reducing agent are discussed. Crystalstructureanalysis of the disulphone (2), designed as a model for intramolecular C–H ⋯ N interactions, shows it to have an extended conformation
The present disclosure invention relates to novel secondary aminosilanes, a method for producing same, and the use thereof. The secondary aminosilanes can be produced from readily available reactants in a simple manner. The secondary aminosilanes are characterized for example by a low viscosity and are well suited for producing silane-functional polymers that have a low viscosity, fast curing, and good thermal stability.
The present invention relates in a first consideration to aldimines of formula (I). Said aldimines are particularly suitable as latent hardeners in curable compositions, particularly compositions comprising one or two-component isocyanate groups. Due to the presence of the reactive group, they can be converted to compounds of the formulas (X) and (XII) comprising aldimine groups, implementing a further consideration of the present invention. The aldimines, or the compounds comprising aldimine groups, can be used primarily in adhesive and sealant materials, but also in coatings, and can be produced easily from readily available source materials, and have good thermal stability. The tertiary amino group thereof has a surprisingly low alkalinity and can in some cases have a catalytic effect in chemical reaction systems.
POLYAMINES HAVING SECONDARY ALIPHATIC AMINO GROUPS
申请人:Butikofer Pierre-Andre
公开号:US20130261270A1
公开(公告)日:2013-10-03
The present invention relates to novel polyamines having secondary amino groups, a process for producing them, adducts of these polyamines and their uses. The polyamines can be prepared in a simple way from readily available reactants. They and their adducts have, in particular, a low viscosity and are suitable as constituent of polyurethane and polyurea compositions having excellent processability and high flexibility, and also constituent of epoxy resin compositions, especially coatings.