Method and composition of asphaltic roofing fluxes
AssigneeAshland Oil, Inc.
InventorsRobert H. Wombles, Donald D. Carlos, Charles R. Gannon
Life of this patent
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Abstract
Preparation of satisfactory asphaltic roofing fluxes from otherwise unsatisfactory fluxes is disclosed to involve addition of asphaltenes, and saturates in quantities which satisfy certain specified conditions. Air oxidation of a flux is shown to be surprisingly accelerated by the addition of highly branched saturates, especially in the presence of a carbonate oxidation catalyst.
Claims25
A process for producing a satisfactory asphaltic roofing flux from an unsatisfactory asphaltic roofing flux, said process comprising:
- compounding into said unsatisfactory flux,
- (1) a sufficient quantity of from about 0 to 20% by weight, as based upon the total weight of said satisfactory flux, of asphaltenes to provide a stable dispersion;
- and
- (2) a sufficient quantity of an additive selected from the group consisting of slack waxes, petrolatums, hydrocarbyl species, and mixtures thereof so that the total amount of asphaltenes, polars and saturates which are present in the satisfactory asphaltic roofing flux satisfies the following equation:
- (A+P)/(S+S-additive) is a weight ratio less than about 2.4;
- wherein:
- A is the weight of asphaltenes in the satisfactory flux;
- P is the weight of polars in the satisfactory flux;
- S is the weight of saturates in the unsatisfactory flux;
- and
- S-additive is the weight of said additive.
A process for producing a satisfactory asphaltic roofing flux from an unsatisfactory asphaltic roofing flux, said process comprising:
- (a) determining the amount of asphaltenes, polars and saturates present in said unsatisfactory flux;
- (b) determining the amount of asphaltenes, polars and saturates in an additive selected from the group consisting of deasphalted oils, slack waxes, petrolatums, a hydrocarbyl species, cylinder stock and mixtures thereof;
- (c) compounding a sufficient quantity of from 0 to 20% by weight as based upon the total weight of said satisfactory asphaltic flux, of asphaltenes to provide a stable dispersion, and a sufficient quantity of said additive so that:
- (A+P)/(S) is a weight ratio less than about 2.4;
- wherein:
- A is the weight of asphaltenes in the flux;
- P is the weight of polars in the flux;
- S is the weight of saturates in the flux.
A flux which comprises:
- (a) an unsatisfactory asphaltic roofing composition;
- (b) a sufficient quantity of from 0 to 20% by weight, as based upon the total weight of said flux, of asphaltenes, to provide a stable dispersion;
- and
- (c) a sufficient quantity of an additive selected from the group consisting of deasphalted oils, slack waxes, petrolatums, hydrocarbyl species, and mixtures thereof so that the following conditions are satisfied;
- (1) the flux is a stable dispersion;
- and
- (2) (A+P)/(S) is a weight ratio less than about 2.4;
- wherein
- A is the weight of asphaltenes in the flux;
- P is the weight of polars in the flux;
- and
- S is the weight of saturates in the flux.
A flux which comprises:
- (a) an unsatisfactory asphaltic roofing composition;
- (b) a sufficient quantity of from 0 to 20 percent by weight, as based upon the total weight of said flux, of asphaltenes to provide a stable dispersion;
- and
- (c) a sufficient quantity of an additive selected from the group consisting of deasphalted oils, slack waxes, petrolatums, hydrocarbyl species, and mixtures thereof so that the following conditions are satisfied:
- (1) the flux is a stable dispersion:
- (2) (A+P)/(S) is a ratio less than about 2.8 wherein:
- A is the weight of asphaltenes in the flux;
- P is the weight of polars in the flux;
- S is the weight of saturates in the flux;
- and
- (3) there is at least about 20% by weight, as based upon the total weight of said flux, of saturates.
Dependencies are inferred from the claim text.