US4025352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of sulfur concrete
Assignee: BASF SE
•
Filing: 1975-12-16
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Granted: 1977-05-24
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Expires: 1995-12-16
Abstract
Abstract Sulfur concrete which exhibits improved compressive strength and flexural strength, and improved corrosion characteristics, is manufactured by mixing sulfur, dicyclopentadiene and aggregate at from 120° to 160° C. The period for which the sulfur and dicyclopentadiene interact should not exceed certain limits.
Inventors
- 👤 Bernd Leutner
- 👤 Lothar Diehl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:51
CPC Classifications
C; C08; C08G; C08G75/00; C08G75/14; C04; C04B; C04B28/00; C04B28/36; C08L; C08L81/00; C08L81/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A process for the manufacture of sulfur concrete by mixing a binder of molten sulfur and dicyclopentadiene with aggregate and cooling the resulting mixture, wherein sulfur, dicyclopentadiene and the aggregate are mixed at from 120° to 160° C., and the period for which the sulfur and dicyclopentadiene interact, at the particular temperature, is chosen so that it lies on a straight line, parallel to the ordinate of FIG. 1, which intersects the abscissa at the particular temperature and is within the limits of the points of intersection of the straight line with the curves A and D.
Claim 2
Dependent Claim
97 words
A process for the manufacture of sulfur concrete by mixing a binder of molten sulfur and dicyclopentadiene with aggregate and cooling the resulting mixture, wherein sulfur, dicyclopentadiene and the aggregate are mixed at from 120° to 160° C., and the period for which the sulfur and dicyclopentadiene interact, at the particular temperature, is chosen so that it lies on a straight line, parallel to the ordinate of FIG. 1, which intersects the abscissa at the particular temperature and is within the limits of the points of intersection of the straight line with the curves A and D.
Claim 3
Dependent Claim
32 words
A process as set forth in claim 1, wherein the period of interaction is within the limits of the points of intersection of the straight line with the curves B and C.
Claim 4
Dependent Claim
24 words
A process as set forth in claim 1, wherein the mixture contains from 2 to 8 percent by weight, based on sulfur, of dicyclopentadiene.
Claim 5
Dependent Claim
39 words
A process as set forth in claim 1, wherein a mixture of sulfur and the aggregate is brought to the desired temperature within the range of 120° C. to 160° C. and dicyclopentadiene is added whilst continuing the mixing.
Claim 6
Dependent Claim
85 words
A process as set forth in claim 1, wherein, in a first step, a mixture of sulfur and dicyclopentadiene is prepared at from 120° to 160° C., allowing only from 80 to 95% of the total period of interaction required at the specific temperature chosen within the range of 120° to 160° C., and in a second step the resulting mixture is mixed with the aggregate, again at from 120° to 160° C., within the time corresponding to the remainder of the period of interaction.
Claim 7
Dependent Claim
25 words
A process as set forth in claim 5, wherein the first and second process steps are carried out in different locations and at different times.
Claim 8
Dependent Claim
20 words
A process as set forth in claim 1, wherein the mixing is carried out at from 130° to 145° C.
Claim 9
Dependent Claim
25 words
A process as set forth in claim 1, wherein the mixture contains from 4 to 6 per cent by weight, based on sulfur, of dicyclopentadiene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |