Abstract A process for preparing gamma-aminopropylalkoxysilanes and gamma-aminopropylalkylalkoxysilanes by an addition of allylamine to hydrogenalkoxysilanes or hydrogenalkylalkoxysilanes, which comprises boiling the components under reflux, in the presence of a catalyst known for addition reactions, until the temperature of the reaction mixture reaches a constant level above 110* C. The time required is from 30 to 40 hours. The peroxysilanes formed simultaneously with the gamma-aminopropylalkoxysilanes and gammaaminorpopylalkylalkoxysilanes can be removed by vacuum distillation, as first runs. The residue is then a useful adhesion-promoting agent for glass fiber-reinforced synthetics. Other uses for the gamma-aminopropylalkoxysilanes and gammaaminopropylalkylalkoxysilanes of this invention are: surface treating of textiles, leather, ceramics, glass; corrosion protection of metals, use as primers and adhesives and for modifying synthetics.
The process as defined in claim 1, wherein the reaction is carried out in the absence of a higher boiling solvent for about 50 to 60 hours.
Claim 2
Dependent Claim
29 words
The process as defined in claim 1, wherein the reaction is carried out in a solvent having a higher boiling point than the reaction for 10 to 40 hours.
Claim 3
Dependent Claim
39 words
The process as defined in claim 3 wherein the peralkoxysilanes obtained simultaneously in the preparation of hydrogenalkoxysilanes remain as solvent in the reaction mixture but are removed as first run by vacuum distillation after the addition reaction is completed.
Claim 4
Dependent Claim
34 words
The process as defined in claim 3, wherein allylamine and a mixture of triethoxysilane and tetraethoxysilane are reacted in substantially equimolar proportion until the temperature has reached a constant level, whereby gamma-aminopropyltriethoxysilane is produced.
Claim 5
Dependent Claim
32 words
The process as defined in claim 3, wherein allylamine and trimethoxysilane are reacted in substantially equimolar proportion until the temperature has reached the constant level of 116* C., whereby gamma-aminopropyltrimethoxysilane is produced.
Claim 6
Dependent Claim
32 words
The process as defined in claim 3, wherein allylamine and methyldiethoxysilane are reacted in substantially equimolar proportion until the temperature has reached the constant level of 146* C., whereby gamma-aminopropylmethyldiethoxysilane is produced.
Claim 7
Dependent Claim
12 words
The process as defined in claim 3, wherein the solvent is tetraalkoxysilane.