초록 ▼

An additive for alkali metal silicate solutions, comprising a quaternary ammonium compound having the general formula (1) R1R2R3R4N+OH−, wherein R1, R2, R3 and R4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, hydroxy-substituted alkaryl

An additive for alkali metal silicate solutions, comprising a quaternary ammonium compound having the general formula (1) R1R2R3R4N+OH−, wherein R1, R2, R3 and R4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms, or groups having the general formula —CH2n-N+R5R6R7 wherein n is an integer having a value of from 1 to 12, the group —CH2n may be hydroxy-substituted, and R5, R6 and R7 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups or hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms; with the proviso that at least one of the groups R1, R2, R3, R4, R5, R6 and R7 represents a hydroxy-substituted alkyl group or a hydroxy-substituted alkaryl group comprising at least 2 carbon atoms wherein the hydroxy substituent is not located on a carbon atom which is bonded to a nitrogen atom.

대표청구항 ▼

1. A stable aqueous solution for the production of fire resistant glazings comprising: at least one alkali metal silicate;water; andat least one additive comprising a quaternary ammonium compound having the general formula 1: R1R2R3R4N+OH−  1wherein R1, R2, R3 and R4 which may be the same or differe

1. A stable aqueous solution for the production of fire resistant glazings comprising: at least one alkali metal silicate;water; andat least one additive comprising a quaternary ammonium compound having the general formula 1: R1R2R3R4N+OH−  1wherein R1, R2, R3 and R4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms, or groups having the general formula —[CH2]n-N+R5R6R7 wherein n is an integer having a value of from 1 to 12, the group —[CH2]n- may be hydroxy-substituted, and R5, R6 and R7 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups or hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms;with the proviso that at least one of the groups R1, R2, R3, R4, R5, R6 and R7 represents a hydroxy-substituted alkyl group or a hydroxy-substituted alkaryl group comprising at least 2 carbon atoms wherein the hydroxy substituent is not located on a carbon atom which is bonded to a nitrogen atom; and whereinthe additive comprises at least two hydroxy substituents; andat least one of the groups R1-7 comprises at least two hydroxy substituents. 2. The aqueous solution according to claim 1, wherein R1, R2, R3 and R4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, or hydroxy-substituted alkaryl groups comprising from 1 to 8 carbon atoms. 3. The aqueous solution according to claim 1, wherein R1, R2, R3 and R4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, or hydroxy-substituted alkaryl groups comprising from 3 to 8 carbon atoms. 4. The aqueous solution according to claim 1, wherein the additive is present in an amount of from 0.01 to 10% by weight of the solution. 5. A transparent intumescent interlayer for the production of fire resistant glazings comprising: at least one alkali metal silicate,water; andat least one additive comprising a quaternary ammonium compound having the general formula 1: R1R2R3R4N+OH−  1wherein R1, R2, R3 and R4 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups, hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms, or groups having the general formula —[CH2]n-N+R5R6R7 wherein n is an integer having a value of from 1 to 12, the group —[CH2]n- may be hydroxy-substituted, and R5, R6 and R7 which may be the same or different represent alkyl groups, hydroxy-substituted alkyl groups, alkaryl groups or hydroxy-substituted alkaryl groups comprising from 1 to 12 carbon atoms;with the proviso that at least one of the groups R1, R2, R3, R4, R5, R6 and R7 represents a hydroxy-substituted alkyl group or a hydroxy-substituted alkaryl group comprising at least 2 carbon atoms wherein the hydroxy substituent is not located on a carbon atom which is bonded to a nitrogen atom; and whereinthe additive comprises at least two hydroxy substituents; andat least one of the groups R1-7 comprises at least two hydroxy substituents. 6. The interlayer according to claim 5, wherein the interlayer comprises from 10 to 50% by weight of water. 7. A fire resistant glazing comprising at least one interlayer according to claim 5 attached to at least one glass sheet. 8. A fire resistant glazing assembly comprising at least one fire resistant glazing according to claim 7 attached to a frame.