Claims
- 1. An impregnating agent consisting essentially of
- (a) an NCO-prepolymer or NCO-semi-prepolymer which is curable by atmospheric moisture, with an NCO content of 2 to 25% by weight, based on
- (a1) an organic polyisocyanate and
- (a2) a compound with at least 2 alcohol hydroxyl groups,
- (b) a solvent which is inert with respect to isocyanate groups in which the (a1) organic polyisocyanate is a polyisocyanate with exclusively aliphatically or cycloaliphatically bound isocyanate groups and the (a2) polyhydroxyl compound is a polysiloxane of the molecular weight range of 300 to 5000 which has at least 2 alcoholically bound hydroxyl groups.
- 2. An impregnating agent according to claim 1, in which the (a2) component is a hydroxyl terminated polysiloxane of the following formula: ##STR2## in which R stands for an alkyl residue with 1 to 6 carbon atoms,
- n stands for a whole number from 1 to 6 and
- x stands for a whole number from 4 to 50.
- 3. An impregnating agent according to claim 1, which additionally contains auxiliary agents and supplementary agents.
- 4. An impregnating agent according to claim 2, in which R stands for a methyl group, n stands for 1 and x stands for a whole number from 5 to 20.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3629061 |
Aug 1986 |
DEX |
|
Parent Case Info
This is a division of application Ser. No. 083,760, filed Aug. 10, 1987.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4374237 |
Berger et al. |
Feb 1983 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
83760 |
Aug 1987 |
|