Silicone oil pastes
AssigneeWacker Chemie AG
InventorsChristian Herzig, Siegfried Dormeier
Life of this patent
Estimating the term…
Abstract
Pastes comprise (1) siloxane copolymers which contain at least two groups of the general formula —C(O)NR1— in covalently bonded form on average per molecule, where R1 is a hydrogen atom or an alkyl radical having 1 to 18 carbon atoms and (2) organic compound(s) with a melting point greater than 0° C. which are dispersed in the siloxane copolymers (1) and contain at least one group which participates in the formation of hydrogen bridges with the —C(O)NR1 groups in (1). The pastes are useful for numerous purposes, for example as hydrophobicizing compositions.
Claims20
A paste comprising
- (1) at least one siloxane copolymer which contains at least two groups of the formula
- —C(O)NR1—
- in covalently bonded form on average per molecule, which are liquid at 25° C., and which have a number average molecular weight Mn from 500 to 5,000,000 daltons, where R1 is a hydrogen atom or an alkyl radical having 1 to 18 carbon atoms;
- and
- (2) at least one organic compound which is a solid at 25° C. and has a molecular weight Mn of up to 1000 daltons, dispersed in the siloxane copolymers (1), wherein said at least one organic compound contains at least one group which participates in the formation of hydrogen bridges with the —C(O)NR1 groups in (1).
A paste comprising
- (1) at least one siloxane copolymer which contains at least two groups of the formula
- —C(O)NR1—
- in covalently bonded form on average per molecule, where R1 is a hydrogen atom or an alkyl radical having 1 to 18 carbon atoms;
- and
- (2) at least one organic compound with a melting point greater than 0° C., dispersed in the siloxane copolymers (1), said compound comprising a diurethane, a diurea, or mixture thereof.
A paste, comprising
- (1) at least one linear organopolysiloxane copolymer containing at least two groups of the formula
- —C(O)NR1—
- covalently bonded a) within the linear organopolysiloxane copolymer chain, b) at the termini thereof, or bonded as described in both a) and b), said copolymer being a liquid at 25° C., where R1 is a hydrogen atom or an alkyl radical having 1 to 18 carbon atoms;
- and
- (2) at least one compound having a molecular weight Mn of up to 1000 daltons and having at least one group which participates in the formation of hydrogen bridges with —C(O)NR1— groups of (1), dispersed in (1).
Dependencies are inferred from the claim text.