production and toxic reaction conditions. The direct conversion of white phosphorus (P4) to DAPIs can circumvent these issues by avoiding the use of Cl2 and PCl3. We present a waste-free, environmentally friendly approach for synthesizing DAPIs using P4 and alcohols, leveraging a combination of photoredox catalyst, nickel catalyst, and halide anion. This photocatalytic method enables the efficient coupling
Adducts of isocyanatoalkyltrimethoxysilanes with flame retardants reactive therewith
申请人:Evonik Degussa GmbH
公开号:US10100207B2
公开(公告)日:2018-10-16
An adduct of at least one isocyanatoalkyltrimethoxysilane with at least one flame retardant reactive with the isocyanatoalkyltrimethoxysilane is used in compositions and for coating plexiglass.
Matrices and sealants which are based on sulfur-containing polymers and which comprise a photoinitiator, curing and coating methods, and use of said matrices and sealants
申请人:Chemetall GmbH
公开号:US10370562B2
公开(公告)日:2019-08-06
A method for curing a mixture of a matrix and a curing agent based on sulfur-containing polymers on command and so rapidly that a tack-free surface results. A method for coating a substrate with the composition and of curing a sealant is also provided. The matrix and curing agent containing sulfur-containing polymers. The mixture is an uncured mixture with an isocyanate content, and the matrix is uncured and contains a mercaptan-terminated base polymer based on at least one polyether, polythioether, polysulfide or copolymers thereof. The uncured matrix, the curing agent, or both contain at least one photoinitiator based on sterically-inhibited tertiary amines. The mixture cures in the temperature range of −10 to +70° C. after the high-energy actinic radiation is applied. Corresponding matrices A, mixtures B, curing agents, sealant systems, and substrates, e.g., aircraft are contemplated.
Method for producing flame retardant polyurethane foams using halogen-free flame retardants
申请人:Covestro Deutschland AG
公开号:US10563032B2
公开(公告)日:2020-02-18
The present invention relates to a process for producing flame-retarded polyurethane foams, in particular flexible polyurethane foams, using halogen-free flame retardants, wherein the resulting flame-retarded polyurethane foams exhibit low emission values coupled with good mechanical properties. The present invention further relates to halogen-free flame retardants.