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Patent US4600657A successfully refreshed from Google Patents.
US4600657A
Expired / Lapsed
US
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Protective coatings for asphaltic concrete surfaces and methods for forming the same
Assignee: Wacker Chemie AG
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Filing: 1985-02-01
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Granted: 1986-07-15
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Expires: 2005-02-01
Abstract
Abstract Asphaltic concrete surfaces are protected from undesirable changes by applying a composition comprising a diorganopolysiloxane containing rod-shaped styrene-n-butyl acrylate copolymers which are obtained from the free-radical copolymerization of said monomers in the presence of the diorganopolysiloxane onto an asphaltic concrete surface and thereafter crosslinking the diorganopolysiloxane composition to form an elastomeric coating thereon. The asphaltic concrete surface may be coated with a primer prior to the application of the crosslinkable diorganopolysiloxane composition in order to improve the adhesion of the resultant crosslinked elastomer containing the rod-shaped copolymers. These asphaltic concrete coatings are especially useful in, for example, hydraulic engineering.
Inventors
- 👤 Karl-Heinrich Wegehaupt
- 👤 Rudolf Pusch
- 👤 Hans R. Pfeffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:52
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/46; C04B41/49; C04B41/4905; C04B41/52; C04B41/60; C04B41/61; C04B41/62; C04B41/64; C04B41/70; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31652; Y10T428/31663; Y10T428/31815
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
51 words
A method for coating asphaltic concrete which comprises applying a crosslinkable composition comprising a diorganopolysiloxane containing rod-shaped styrene-n-butyl acrylate copolymers which are obtained from the free-radical copolymerization of said monomers in the presence of the diorganopolysiloxane, and thereafter crosslinking the diorganopolysiloxane composition to form an elastomeric coating on the asphaltic concrete.
Claim 2
Independent Claim
51 words
A method for coating asphaltic concrete which comprises applying a crosslinkable composition comprising a diorganopolysiloxane containing rod-shaped styrene-n-butyl acrylate copolymers which are obtained from the free-radical copolymerization of said monomers in the presence of the diorganopolysiloxane, and thereafter crosslinking the diorganopolysiloxane composition to form an elastomeric coating on the asphaltic concrete.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the composition contains a crosslinkable diorganopolysiloxane, rod-shaped styrene-n-butyl acrylate copolymers, an epoxy resin and a crosslinking agent.
Claim 4
Dependent Claim
23 words
The method of claim 1, wherein a primer composition is applied to the asphaltic concrete prior to the application of the diorganopolysiloxane composition.
Claim 5
Dependent Claim
12 words
The method of claim 2, wherein the composition contains a crosslinking catalyst.
Claim 6
Dependent Claim
60 words
The method of claim 3, wherein the primer is selected from the group consisting of a silane in which each molecule contains at least one amino group bonded to silicon through carbon and at least one monovalent hydrocarbon radical bonded to silicon through oxygen, which may be substituted with an amino group or alkoxy group, partial hydrolyzates and mixtures thereof.
Claim 7
Dependent Claim
43 words
The method of claim 3, wherein the primer is a silane of the formula H.sub.2 N(CH.sub.2).sub.3 NH(CH.sub.2).sub.3 Si(OR).sub.3 where R is selected from the group consisting of an alkyl radical having from 1 to 5 carbon atoms per radical and a methoxyethylene radical.
Claim 8
Dependent Claim
11 words
The coated asphaltic concrete obtained from the method of claim 1.
Claim 9
Dependent Claim
11 words
The coated asphaltic concrete obtained from the method of claim 2.
Claim 10
Dependent Claim
11 words
The coated asphaltic concrete obtained from the method of claim 3.
Claim 11
Dependent Claim
11 words
The coated asphaltic concrete obtained from the method of claim 4.
Claim 12
Dependent Claim
11 words
The coated asphaltic concrete obtained from the method of claim 5.
Claim 13
Dependent Claim
11 words
The coated asphaltic concrete obtained from the method of claim 6.
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) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |