Release agent

The title of this article is ambiguous. For special release agents for treating concrete formwork, see Release agents (formwork) .

Release agents should keep adjacent materials separable. Many release agents are also used as lubricants .

They are often used to prevent cast or molded parts from sticking to the mold during molding processes ( mold release agents ) or to prevent bulk goods or foodstuffs from sticking ( product release agents ) .

Examples:

• Wax on plastic molds
• Assembly paste for easier assembly and disassembly as well as against contact corrosion
• Hot screw compound as an assembly paste for machine parts that are exposed to high temperatures; also referred to as [graphite paste ] or copper paste ; In addition to non-ferrous metals (copper, aluminum, zinc), it can also contain ceramic substances such as titanium nitride ; Silicone greases or PTFE compounds serve as the carrier substance
• Maize flour or calcium powder as a release agent in sheet-fed offset printing
• Formwork oil , used in concrete construction to separate the concrete from the casting mold ( formwork )
• Silicone oils as release agents in die casting machines
• Talc prevents latex and rubber from sticking together , e.g. B. mature in rubber hoses of vehicles
• Talc when pouring tin with silicone molds and soot when casting tin with metal molds.

Food sector

Release agents in the food sector often contain waxes , wax esters or fats , so they are hydrophobic .

Emulsifiers can be included to improve the distribution of release agents and antioxidants .

The application of the release agent is called separating . In spray cans bottled mold release agent for baking are called cooking spray , release spray or baking spray sold.

Product release agent:

• Corn starch , beeswax or carnauba wax on gummy bears
• Trickling aids in table salt
• Calcium phosphate (E 341) in some powdered foods such as B. Coffee creamer to prevent the powder from clumping

Mold release agent:

• Butter , oil or margarine are used to grease baking tins to prevent cake batter from sticking
• Flour prevents bread dough from sticking
• Baking paper prevents food from sticking to baking and baking trays
• Teflon prevents sticking and caking even at higher temperatures

See also

• Separating layer
• Release paper

literature

• Hannelore Coordes: Mold release agents . In: Wissensforum Backwaren eV (Ed.): Information from the Wissensforum Backwaren . 3. Edition. No. 21 . Bonn, Vienna May 2009 ( [1] [PDF; 184 kB ]).