Extrusion lubricant composition and process
AssigneeAmerican Hoechst Corporation
InventorJ. David Bower
Life of this patent
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Abstract
Compositions of matter and processes for making the compositions of matter are described. The compositions are extrusion lubricant compositions and may be prepared by either combining appropriate initial components in predetermined amounts, or forming a homogeneous melt of a fatty acid, e.g. stearic acid, and one or more polar substances, e.g., a fatty alcohol or polyalcohol, adding a metal base material to form the metal salt of the fatty acid in situ, and adding one or more waxes such as microwaxes, paraffins and/or alpha-olefins to the mixture. The compositions are effective lubricants used in heat processing of vinyl chloride resin compositions.
Claims15
A composition of matter consisting essentially of a mixture of (i) from about 1 to about ninety parts by weight of one or more hydrocarbon waxes per 99 to 10 parts by weight of (ii) an additive which consists essentially of
- (A) from about 30 to 80% by weight of a Group II or lead metal salt of an alkyl fatty acid having from 12 to 30 carbon atoms;
- (B) from about 1 to 30% by weight of a fatty acid having from 12 to 30 carbon atoms;
- and
- (C) from about 20 to 60% by weight of one or more polar substances selected from the group of fatty monoalcohols and glycerol monostearate.
A composition of matter consisting essentially of (i) from about 1 to about ninety parts by weight of one or more hydrocarbon waxes per 99 to 10 parts by weight of (ii) an additive which consists essentially of
- (A) from about 30 to 80% by weight of calcium stearate;
- (B) from about 1% to about 30% by weight of stearic acid;
- and
- (C) from about 20% to about 60% by weight of one or more polar substances selected from the group consisting of fatty monoalcohols and glycerol monostearate.
A process for producing a composition of matter, comprising:
- (A) mixing an alkyl fatty acid having from 12 to 30 carbon atoms with one or more polar substances selected from the group consisting of fatty monoalcohols and glycerol monostearate;
- and prior to or during step (b), adding one or more hydrocarbon waxes selected from the group consisting of polyethylene waxes, microwaxes, paraffins and alpha-olefins to said mixture,
- (B) heating the mixture to a temperature of at least 100.degree. C. and below 150.degree. C. to form a homogeneous melt, and
- (C) adding thereto a finely divided Group II metal or lead compound selected from the group consisting of the metallic hydroxide, oxide and mixtures thereof, so as to produce a fatty acid metal salt-containing composition.
A process for producing a composition of matter comprising:
- (a) combining the following components:
- (i) calcium stearate
- (ii) one or more polar substance selected from the group consisting of fatty monoalcohols and glycerol monostearate;
- and
- (iv) one or more hydrocarbon waxes selected from the group consisting of polyethylene waxes, microwaxes, paraffins and alpha-olefins;
- and
- (b) heating said components to a temperature of at least 100.degree. C. and below 150.degree. C. under agitation.
A method of lubricating vinyl chloride resin during extrusion comprising the addition thereto, prior to or during said extrusion, of from 0.5 to 5 percent by weight based upon the total weight of the lubricated resin of an extrusion lubricant consisting essentially of
- (i) from about 1 to ninety parts by weight of one or more hydrocarbon waxes per 99 to 10 parts by weight of
- (ii) an additive which consists essentially of
- (A) from about 30 to 80% by weight of a Group II or lead metal salt of an alkyl fatty acid having from 12 to 30 carbon atoms;
- (B) from about 1 to 30% by weight of a fatty acid having from 12 to 30 carbon atoms and
- (C) from about 20 to 60% by weight of one or more polar substances selected from the group consisting of fatty monoalcohols and glycerol monostearate.
Dependencies are inferred from the claim text.