Aqueous release agents and their use in the production of polyurethane molding
AssigneeEvonik Goldschmidt GmbH
InventorsTorsten Henning, Anja Kindling, Ralf Althoff
Life of this patent
Estimating the term…
Abstract
The invention provides aqueous release agent dispersions for producing polyurethane moldings, substantially including A) at least one agent having release activity, and selected from the group consisting of soaps, oils, waxes and silicones, and B) emulsifiers and C) if desired, foam stabilizers, and D) if desired, viscosity modifiers, and E) if desired, auxiliaries and additives, and F) at least one alkali metal or alkaline earth metal carboxylate, and G) water.
Claims14
An aqueous release agent dispersion for producing polyurethane moldings, comprising:
- at least one agent having release activity, and selected from the group consisting of soaps, oils, waxes and silicones;
- emulsifiers;
- 0.05% to 10% by weight of at least one alkali metal or alkaline earth metal carboxylate;
- and
- water.
An aqueous release agent dispersion for producing polyurethane moldings consisting of:
- A) 0.5% to 40% by weight of at least one agent having release activity, and selected from the group consisting of soaps, oils, waxes, and silicones;
- B) 0.1% to 10% by weight of emulsifiers;
- C) 0% to 5% by weight of foam stabilizers;
- D) 0% to 5% by weight of viscosity modifiers;
- E) 0% to 2% by weight of at least one auxiliary and an additive;
- F) 0.05% to 10% by weight of at least one alkali metal or alkaline earth metal carboxylate;
- and
- G) water.
A method of producing a polyurethane molding comprising:
- heating a mold to a mold temperature of 45° C. to 80° C.;
- applying an aqueous release agent to said mold, said aqueous release agent including:
- at least one agent having release activity, and selected from the group consisting of soaps, oils, waxes, and silicones;
- emulsifiers;
- 0.01% to 10% by weight of at least one alkali metal or alkaline earth metal carboxylate;
- and
- water;
- adding a reactive polyurethane system comprising at least a polyol and a polyisocyanate to said mold;
- closing said mold and curing said mold containing said reactive polyurethane system and said aqueous release agent to provide a molded article;
- and
- opening said mold and removing said molded article from said mold.
Dependencies are inferred from the claim text.