Patent US4137088A successfully refreshed from Google Patents.
US4137088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plasticizer combination for building materials
Assignee: Hoechst AG
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Filing: 1978-02-02
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Granted: 1979-01-30
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Expires: 1998-02-02
Abstract
Abstract This invention relates to an additive combination, for water-containing, setting building materials, in particular those of cement, based on an anionic polyelectrolyte, and including at least one nonionic, low-foaming surfactant. The invention also relates to a process for plasticizing water-containing, setting building materials.
Inventors
- 👤 Gerhard Debus
- 👤 Volker Knittel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:10
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
59 words
An additive combination for water containing, setting building materials, in particular those of cement, based on about 0.1% by weight to 3.0% by weight of an anionic polyelectrolyte, and including at least about 0.05% by weight to 1.0% by weight of a non-ionic, low-foaming surfactant, all percent by weight values being relative to a binder in the building material.
Claim 2
Dependent Claim
59 words
An additive combination for water containing, setting building materials, in particular those of cement, based on about 0.1% by weight to 3.0% by weight of an anionic polyelectrolyte, and including at least about 0.05% by weight to 1.0% by weight of a non-ionic, low-foaming surfactant, all percent by weight values being relative to a binder in the building material.
Claim 3
Dependent Claim
38 words
An additive combination as claimed in claim 1 which includes, in addition, at least 0.01% by weight to 0.5% by weight of a polyhydroxy monocarboxylic or polyhydroxy dicarboxylic acid, also relative to a binder in the building material.
Claim 4
Dependent Claim
24 words
An additive combination as claimed in claim 1 which includes a surfactant containing a proportion of hydrophobic groups greater than that of hydrophilic groups.
Claim 5
Dependent Claim
30 words
An additive combination as claimed in claim 1 which includes a surfactant which is an optionally modified block polymer of propylene oxide and ethylene oxide or an alkylaryl polyglycol ether.
Claim 6
Dependent Claim
32 words
An additive combination as claimed in claim 2 which includes, in addition, at least one compound of the general formula ##STR2## or a salt corresponding thereto, with n = 2 to 5.
Claim 7
Dependent Claim
31 words
An additive combination as claimed in claim 2 which includes, in addition, at least one compound selected from the group consisting of D-gluconic acid, heptonic acid, tartaric acid and salts thereof.
Claim 8
Dependent Claim
65 words
A process for the plasticizing of water-containing, setting building materials, in particular those of cement, which comprises adding to the building material an additive combination composed of about 0.1% by weight to 3.0% by weight of an anionic polyelectrolyte and at least about 0.05 to 1.0% of a non-ionic, low-foaming surfactant, all percent by weight values being relative to a binder in the building material.
Claim 9
Dependent Claim
65 words
A process for the plasticizing of water-containing, setting building materials, in particular those of cement, which comprises adding to the building material an additive combination composed of about 0.1% by weight to 3.0% by weight of an anionic polyelectrolyte and at least about 0.05 to 1.0% of a non-ionic, low-foaming surfactant, all percent by weight values being relative to a binder in the building material.
Claim 10
Dependent Claim
42 words
A process as claimed in claim 7 in which the additive combination contains, in addition, at least about 0.01% by weight to 0.5% by weight of one polyhydroxy monocarboxylic or polyhydroxy dicarboxylic acid, also relative to a binder in the building material.
References Cited (Backward Citations)
US3686133A
Cited
US3769051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |