US3890429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic stannic oxide polymers and method for the preparation thereof
Assignee: Research Corp
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Filing: 1971-10-22
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Granted: 1975-06-17
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Expires: 1991-10-22
Abstract
Abstract Inorganic stannic oxide polymers are provided which are comprised of a major portion of repeating units of the formula IN WHICH AT LEAST ONE OF THE GROUPS R1-R4 is -OH or -O- and at least one of the groups R1-R4 is an anion of a water soluble salt of tin (IV) such as a chloride, bromide, nitrate, sulfate anion etc., with the remainder of the groups being -OH, -O- or an anion as defined above and a minor portion of repeating units of the formula WHEREIN M1 is a divalent metal ion and M2 is a trivalent metal ion. M1 and M2 are metallic ions of the same or different metal. The suitable metal ions exhibit two stable states of oxidation in an aqueous system. The polymers of this invention are positively charged and are highly hydrophilic. The polymers of this invention are especially useful for changing surface characteristics of a substrate such as imparting hydrophilic properties to normally hydrophobic materials.
Inventors
- 👤 Louis L Pytlewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
C; C03; C03C; C03C17/00; C03C17/34; C03C17/3411; C03C17/3429; C03C17/3447; C03C17/3458; B; B05; B05D; B05D5/00; B05D5/08; B41; B41M; B41M1/00; B41M1/26; B41M1/36; C01; C01G; C01G19/00; C03C17/22; C03C17/23; C03C17/25; C03C17/253; C03C17/3417; C03C2217/00; C03C2217/20; C03C2217/21; C03C2217/211; C03C2217/229; C03C2217/28; C03C2217/29; C03C2218/00; C03C2218/10; C03C2218/11; C03C2218/113; C03C2218/114; Y; Y10; Y10T; Y10T428/00; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/265
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
AN INORGANIC HYDROPHILIC POLYMER CONSISTING ESSENTIALLY OF (A) A MAJOR PORTION OF FIRST MONOMERIC UNITS OF THE FORMULA -(SN(-R1)(-R2)-O-SN(-R3)(-R4)-O)WHEREIN AT LEAST ONE OF THE GROUPS R1-R4 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF -OH AND -O-AND AT LEAST ONE OF THE GROUPS R1-R4 IS AN ANION OF A WATER SOLUBLE SALT OF TIN THE REMAINDER OF THE GROUPS R1-R4 BEING MEMBERS SELECTED FROM THE GROUP CONSISTING OF-OH, -O- AND AN ANION AS DEFINED ABOVE AND (B) A MINOR PORTION OF A SECOND MONOMERIC UNIT SELECTED FROM THE GROUP CONSISTING OF -M1-O-, >M2-O-, AND MIXTURES THEREOF WHEREIN M1 IS DIVALENT METAL ION AND M2 IS A TRIVALENT METAL ION OF A METAL HAVING TWO STABLE STATES OF OXIDATION IN AN AQUEOUS MEDIUM SAID MINOR PORTIONS BEING EFFECTIVE TO IMPART COLLOIDAL PROPERTIES TO SAID POLYMER WHEN DISPERSED IN WATER,
Claim 2
Dependent Claim
139 words
AN INORGANIC HYDROPHILIC POLYMER CONSISTING ESSENTIALLY OF (A) A MAJOR PORTION OF FIRST MONOMERIC UNITS OF THE FORMULA -(SN(-R1)(-R2)-O-SN(-R3)(-R4)-O)WHEREIN AT LEAST ONE OF THE GROUPS R1-R4 IS A MEMBER SELECTED FROM THE GROUP CONSISTING OF -OH AND -O-AND AT LEAST ONE OF THE GROUPS R1-R4 IS AN ANION OF A WATER SOLUBLE SALT OF TIN THE REMAINDER OF THE GROUPS R1-R4 BEING MEMBERS SELECTED FROM THE GROUP CONSISTING OF-OH, -O- AND AN ANION AS DEFINED ABOVE AND (B) A MINOR PORTION OF A SECOND MONOMERIC UNIT SELECTED FROM THE GROUP CONSISTING OF -M1-O-, >M2-O-, AND MIXTURES THEREOF WHEREIN M1 IS DIVALENT METAL ION AND M2 IS A TRIVALENT METAL ION OF A METAL HAVING TWO STABLE STATES OF OXIDATION IN AN AQUEOUS MEDIUM SAID MINOR PORTIONS BEING EFFECTIVE TO IMPART COLLOIDAL PROPERTIES TO SAID POLYMER WHEN DISPERSED IN WATER,
Claim 3
Dependent Claim
21 words
The polymer according to claim 1 wherein said anion is selected from the group consisting of chloride, bromide, sulfate and nitrate.
Claim 4
Dependent Claim
17 words
The polymer according to claim 1 wherein said second monomeric unit is represented by the formula -Sn-O-
Claim 5
Dependent Claim
137 words
A PROCESS FOR THE MANUFACTURE OF THE POLYMER ACCORDING TO CLAIM 1 CONSISTING ESSENTIALLY OF THE STEPS OF ADDING TO WATER A FIRST AMOUNT OF A WATER SOLUBLE STANNIC SALT WHICH IS HYDROLIZABLE TO A STANNIC OXIDE MONOMERIC UNIT OF THE FORMULA -(SN(-R1)(-R2)-O-SN(-R3)(-R4)-O)ADDING A SECOND AMOUNT OF A REACTANT SELECTED FROM THE GROUP CONSISTING OF (1) A SALT OF A METAL WHICH HAS TWO STABLE VALENCES IN AN AQUEOUS SOLUTION, SAID SALT BEING ADDED IN THE LOWER VALENCE STATE, AND (2) AN ELEMENTAL METAL, SAID SECOND AMOUNT BEING AN EFFECTIVE AMOUNT SUFFICIENT TO REACT WITH SAID FIRST AMOUNT OF SAID STANNIC SALT TO PROVIDE SAID COLLOIDALLY DISPERSIBLE POSITIVELY CHARGED, HYDROPHILIC POLYMER AND HEATING THE RESULTING AQUEOUS MIXTURE TO AN ELEVATE TEMPERATURES LESS THAN THE BOILING POINT OF THE MIXTURE UNTIL A COLOR CHANGE OCCURS IN SAID MIXTURE.
Claim 6
Dependent Claim
13 words
The process according to claim 4 wherein said stannic salt is stannic chloride.
Claim 7
Dependent Claim
13 words
The process according to claim 4 wherein said reactant is a stannous salt.
Claim 8
Dependent Claim
12 words
The process according to claim 4 wherein said reactant is stannous chloride.
Claim 9
Dependent Claim
12 words
The process according to claim 4 wherein said reactant is a metal.
Claim 10
Dependent Claim
12 words
The process according to claim 4 wherein said reactant is metallic tin.
Claim 11
Dependent Claim
18 words
The inorganic hydrophilic polymer according to claim 3 having an X-ray diffraction pattern with characteristic peaks as follows:
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |