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US 2003/0144387 A1Published application
Universal cross linking compound and polymer
OwnerDennis Krivohlavek, Richard R. Ziesmerinventors
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Abstract
A polymer modified asphalt which includes asphalt, a polymer, an aldehyde or a melamine resin, and an element chosen from a group consisting of Group VI-A of Periodic Table, such as sulphur.
Claims45
A polymer modified asphalt or bitumen which comprises:
- asphalt or bitumen;
- a natural or synthetic polymer;
- a universal cross linking agent consisting of:
- a) aldehyde, phenol aldehyde or melamine resins;
- b) Group VI-A elements or donors thereof;
- and
- c) carbonates;
- and
- a redox reaction consisting of a metal anion of the form M(A)x and a salt of the form MHx where M is a metal and H is another metal and X is an integer greater than 1.
6 more elements
A method of producing a polymer modified asphalt or bitumen compound which comprises the steps of:
- modifying asphalt or bitumen with a natural or synthetic polymer additive;
- adding a universal cross linking agent consisting of aldehyde-furfural, phenol aldehyde or melamine resins to said polymer modified asphalt and thereafter mixing;
- adding an element chosen from the group consisting of Group VI-A of the Periodic Table of Elements as an additive to the polymer modified asphalt and said agent and thereafter mixing.
A method of producing a polymer modified asphalt or bitumen compound which comprises the steps of:
- dissolving an element chosen from the group consisting of Group VI-A of the Periodic Table of Elements in an alkali metal hydroxide solution;
- and
- mixing the resulting solution in a mixture of asphalt or bitumen and a polymer additive.
A segmented or block copolymer having segments A-B-C-D which copolymer comprises:
- A is a segment of at least 5 wt. % of a vinyl aromatic hydrocarbon;
- B is a segment of at least 1 wt. % of a mixture of varying proportions of a vinyl aromatic hydrocarbon and a conjugated diene;
- C is a segment of at least 10 wt. % of a conjugated diene;
- and D is a segment of at least 3 wt. % of a pendent vinyl structure of the conjugated diene segment C.
1 more element
Dependencies are inferred from the claim text.