US3882075A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polymers containing additives by interfacial polycondensation
Assignee: Research Corp
•
Filing: 1972-03-24
•
Granted: 1975-05-06
•
Expires: 1992-03-24
Abstract
Abstract An additive is incorporated in a polymer by forming it in situ with the polymer by interfacial polycondensation.
Inventors
- 👤 Rudolf August Victor Raff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:48
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
69 words
IN A METHOD OF FORMING A POLYMER BY CONDENSATION AT THE INTERFACE OF PLURAL IMMISCIBLE SOLVENT SOLUTIONS, EACH CONTAINING AT LEAST ONE MONOMER REQUISITE FOR FORMING THE POLYMER, THE IMPROVEMENT COMPRISING UNIFORMLY INCORPORATING THE REACTANTS PATIBLE ADDITIVE IN SAID POLYMER BY PROVIDING THE REACTANTS DER POLYMERIZATION CONDITIONS SEPARATELY IN THE MONOMER SOLUTIONS WHEREBY THE ADDITIVE IS FORMED IN SITU WITH AND UNIFORMLY DISPERSED IN THE POLYMER AT THE INTERFACE.
Claim 2
Dependent Claim
69 words
IN A METHOD OF FORMING A POLYMER BY CONDENSATION AT THE INTERFACE OF PLURAL IMMISCIBLE SOLVENT SOLUTIONS, EACH CONTAINING AT LEAST ONE MONOMER REQUISITE FOR FORMING THE POLYMER, THE IMPROVEMENT COMPRISING UNIFORMLY INCORPORATING THE REACTANTS PATIBLE ADDITIVE IN SAID POLYMER BY PROVIDING THE REACTANTS DER POLYMERIZATION CONDITIONS SEPARATELY IN THE MONOMER SOLUTIONS WHEREBY THE ADDITIVE IS FORMED IN SITU WITH AND UNIFORMLY DISPERSED IN THE POLYMER AT THE INTERFACE.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein the monomers comprise a diacid halide and an active hydrogen containing compound and are capable of undergoing the Schotten-Baumann condensation.
Claim 4
Dependent Claim
23 words
The method of claim 2 wherein the acid halide is selected from the group consisting of di-carboxylic acid halides, di-sulfonyl halides and bis-haloformates.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein the active hydrogen containing compound is selected from the group consisting of diamines, polyols and dithiols.
Claim 6
Dependent Claim
28 words
The method of claim 2 wherein the acid halide is a dicarboxylic acid chloride, the active hydrogen containing compound is a diamine and the polymer is a polyamide.
Claim 7
Dependent Claim
29 words
The method of claim 2 wherein the acid halide is a dicarboxylic acid chloride, the active hydrogen containing compound is a dihydroxy alcohol and the polymer is a polyester.
Claim 8
Dependent Claim
26 words
The method of claim 2 wherein the acid halide is a bis-chloroformate, the active hydrogen containing compound is a diamine and the polymer is a polyurethane.
Claim 9
Dependent Claim
30 words
The method of claim 1 wherein one of the reactants is a lake former, the other reactant is a metal salt and the additive thus formed is a colored lake.
Claim 10
Dependent Claim
27 words
The method of claim 8 wherein the lake former is 1,2-dihydroxyanthraquinone, the metal salt is a barium salt and the thus formed additive is an alizarin dyestuff.
Claim 11
Dependent Claim
30 words
The method of claim 1 wherein one of the reactants is an inorganic anion, the other reactant is an inorganic cation and the thus formed additive is an insoluble salt.
Claim 12
Dependent Claim
32 words
The method of claim 1 wherein one of the reactants is a metallic salt, the other reactant is a precipitant of the free metal and the thus formed additive is a metal.
Claim 13
Dependent Claim
26 words
The method of claim 1 wherein one of said reactants is a silicate, the other reactant is an acid and the thus formed additive is silica.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |