Internal and
external Lubricants

Advantages

Excellent processibility
Excellent dispersibility

Lubricants are divided into two areas, internal and external lubricants. The transition between external and internal lubricating effect is fluid, however, – internal lubricants often also have a certain external lubrication effect and vice versa. Lubricants having both effects are therefore called “combined lubricants”. Internal lubricants reduce the frictional forces occurring between the PVC molecule chains, thus reducing melt viscosity. They are polar and thus are highly compatible with PVC. They help achieve excellent transparency even at high dosages and do not tend to exudate, which helps optimizing welding, gluing, and printing properties of the final product. External lubricants reduce the adhesion between PVC and metal surfaces. They are mostly non-polar such as paraffin and polyethylene waxes. The external lubrication effect is largely determined by the length of the hydrocarbon chain, its branching and its functional group. At high dosages they can lead to cloudiness and exudation.

Applications

Type	BAEROLUB	Chemical composition	Physical form	Melting [°C]	Lubrication
Solid fatty esters	L-MS	Glycerol partial ester of sturated fatty acids (glyceryl monostearate approx. 40 %)	Powder	56 - 62	Internal
Solid fatty esters	L-CD	Glycerol ester of sturated fatty acids (Castor oil, hydrogenated)	Powder	84 - 88	Internal
Solid fatty esters	GTS	Glycerol ester of sturated fatty acids	Powder	50 - 54	Combined
Solid fatty esters	L-TP	Fatty alcohol phtalate	Powder	46 - 50	Internal
Solid fatty esters	L-PM	Fatty acid ester wax	Powder	52 - 55	Combined
Solid fatty esters	A275	Fatty acid complex ester and fatty acid Calcium soap	Powder Pellets	125 - 135	Combined
Solid fatty esters	43C	Fatty acid complex ester	Powder Pellets	59 - 65	Combined
Solid fatty esters	LS100	Fatty acid complex ester	Powder Pellets	58 - 65	Combined
Liquid fatty acid esters	L-PL	Glycerol partial ester of unsaturated fatty acids (glyceryl mono/dioleate)	Liquid	liquid at room temp.	Internal
Liquid fatty acid esters	L-PK	Fatty acid ester	Liquid	liquid at room temp.	Combined
Solid hydrocarbons	L-KO	Synthetic paraffin wax	Powder	100 - 105	External
Solid hydrocarbons	L-KM	Paraffin wax	Powder	54 - 56	External
Solid hydrocarbons	PA-L	Polyethylene wax	Powder	102 - 110	External
Solid fatty acids, alcohol and amide	FTA	Mixture of fatty acids	Powder	54 - 60	External
Solid fatty acids, alcohol and amide	FTO	Mixture of hydroxy fatty acids	Powder	70 - 80	External
Solid fatty acids, alcohol and amide	L-OH	Mixture of fatty alcohols	Powder	52 - 54	Internal
Solid fatty acids, alcohol and amide	L-AK	Amide wax (N,N'-ethylene distearamide)	Powder	138 - 144	External
Metal soaps	Ceasit SW/PA	Calcium stearate	Powder	approx. 160	Internal
Metal soaps	Zincum T	Zinc stearate	Powder	approx. 120	External

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Powder
- small particles, high active surface area
- good dispersability in final applications
- good compatibility with powder blends
- medium bulk density

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