Claims
- 1. A process for the production of polyurethane-based molded articles covered with a lacquer in which
- (1) internal walls of a mold are lacquered with an in-mold coating lacquer containing a mold release agent which is a reaction product of:
- (a) a first reaction product of a polysiloxane having isocyanate reactive end groups and an excess of organic polyisocyanate which first reaction product contains at least two isocyanate end groups and
- (b) a compound selected from the group consisting of aliphatic alcohols, primary aliphatic amines, secondary aliphatic amines and mixtures thereof which have a molecular weight of from 75 to 5000 and which is monofunctional in the isocyanate addition reaction and contains at least one tertiary amino group and/or oxyalkylene unit before a reaction mixture for producing the polyurethane is introduced into the mold,
- (2) filling the mold with polyurethane-forming mixture after the lacquer has partially dried, and
- (3) allowing the contents of the mold to solidify.
- 2. A process for the production of polyurethane-based molded articles covered with a lacquer in which
- (1) internal walls of a mold are lacquered with an in-mold coating lacquer containing a mold release agent which is the reaction product of:
- (a) a first reaction product of a (i) compound selected from the group consisting of aliphatic alcohols, primary aliphatic amines, secondary aliphatic amines and mixtures thereof having a molecular weight of from 75 to 5000 and which is monofunctional in the isocyanate addition reaction and contains at least one tertiary amino group and/or oxyalkylene unit and (ii) an excess of organic polyisocyanate and
- (b) a polysiloxane containing isocyanate reactive end groups which is difunctional in an isocyanate addition reaction before reaction mixture for producing the polyurethane is introduced into the mold,
- (2) filling the mold after the lacquer has partially dried with polyurethane forming mixture and
- (3) allowing the contents of the mold to solidify.
- 3. The process of claim 1 wherein the lacquer topcoat contains a linear polyurethane polyurea binder.
- 4. The process of claim 2 wherein the lacquer topcoat contains a linear polyurethane polyurea binder.
- 5. The process of claim 1 wherein the lacquer topcoat contains a binder made of an organic polyisocyanate and a polyhydroxyl compound.
- 6. The process of claim 2 wherein the lacquer topcoat contains a binder made of an organic polyisocyanate and a polyhydroxyl compound.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3149619 |
Dec 1981 |
DEX |
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Parent Case Info
This application is a division of application Ser. No. 445,323, filed Nov. 29, 1982.
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Name |
Date |
Kind |
3726952 |
Boden et al. |
Apr 1973 |
|
3993606 |
von Bonin et al. |
Nov 1976 |
|
4024090 |
von Bonin et al. |
May 1977 |
|
4033912 |
Kleinmann et al. |
Jul 1977 |
|
4058492 |
von Bonin et al. |
Nov 1977 |
|
4098731 |
von Bonin et al. |
Jul 1978 |
|
4163830 |
Windemuth et al. |
Aug 1979 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
3012126 |
Oct 1981 |
DEX |
1365215 |
Aug 1974 |
GBX |
1420293 |
Jan 1976 |
GBX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
445323 |
Nov 1982 |
|