Binding agents prepared from resins containing adhesivizing agents of long shelf life

Claim 2

In a binding agent for an inorganic oxidic material comprising a hardenable resin and an aminosilane the improvement wherein said amino silane contains an unsubstituted alkyl group on the nitrogen and/or on the silicon atom.

Claim 3

A binding agent according to claim 1 wherein said aminosilane has the formula ##STR11## where n=1 to 3, m=0 or 1, p=0 or 1 and each R represents a C 1 to C 4 alkyl moiety.

Claim 4

A binding agent according to claim 1 wherein said aminosilane has the formula ##STR12## wherein n=1 to 3, m=0 or 1, p=2 or 3, and each R represents a C 1 to C 4 alkyl moiety.

Claim 5

A composition comprising an inorganic oxidic material and the binding agent of claim 1.

Claim 6

A composition according to claim 4 wherein said inorganic oxidic material is sand.

Claim 7

A composition according to claim 4 wherein said hardenable resin is a phenol-formaldehyde resin.

Claim 8

A composition according to claim 4 wherein said hardenable resin is a polycondensation product of phenol, furfuryl alcohol, urea, and formaldehyde.

Claim 9

A composition according to claim 1 wherein said silane is selected from the group consisting of N-methyl-γ-aminopropyltriethoxysilane, N-ethyl-γ-aminopropyltrimethoxysilane, N-methyl-β-aminoethyltrimethoxysilane, γ-aminopropylmethyldimethoxy silane, N-methyl-γ-aminopropylmethyldimethoxysilane, N-(β-N-methylaminoethyl)-γ-aminopropyltriethoxysilane, N-(γ-aminopropyl)-γ-aminopropylmethyldimethoxysilane, N-(γ-aminopropyl)-N-methyl-γ-aminopropylmethyldimethoxysilane and γ-aminopropylethyldiethoxysilane.

Claim 10

A composition according to claim 4 wherein said silane is selected from the group consisting of N-methyl-γ-aminopropyltriethoxysilane, N-ethyl-γ-aminopropyltrimethoxysilane, N-methyl-β-aminoethyltrimethoxysilane, γ-aminopropylmethyldimethoxy silane, N-methyl-γ-aminopropylmethyldimethoxysilane, N-(β-N-methylaminoethyl)-γ-aminopropyltriethoxysilane, N-(γ-aminopropyl)-γ-aminopropylmethyldimethoxysilane, N-(γ-aminopropyl)-N-methyl-γ-aminopropylmethyldimethoxysilane and γ-aminopropylethyldiethoxysilane.

Claim 11

A composition according to claim 1 wherein the alkyl group has up to 8 carbon atoms.

Claim 12

A composition according to claim 4 wherein said silane is present in an amount up to 5% by weight with respect to the hardenable resin.

Claim 13

A composition according to claim 11 wherein said inorganic oxide is quartz, a silicate, aluminum oxide, titanium oxide or a sand.

Claim 14

A binding agent according to claim 1, in which the silane is alkylated on the nitrogen atom.

Claim 15

A binding agent according to claim 1, in which the silane is alkylated on the silicon atom.

Claim 16

A binding agent according to claim 1, in which the silane is alkylated on both the nitrogen and silicon atoms.

Claim 17

A binding agent according to claim 1, wherein said hardenable resin is a phenol-formaldehyde resin, a furfuryl alcohol based resin or a copolycondensate of furfuryl-alcohol, phenol, urea and formaldehyde.

Claim 18

A binding agent according to claim 1, wherein the nitrogen atom contains an unsubstituted alkyl group.

Claim 19

A binding agent according to claim 1, wherein the silicon atom contains an unsubstituted alkyl group.

Claim 20

A binding agent according to claim 17, wherein said unsubstituted alkyl group is methyl, ethyl or butyl.

Claim 21

A binding agent according to claim 18, wherein said unsubstituted alkyl group is methyl, ethyl or butyl.