US4140665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coagulating a polymer dispersion in the presence of a heat sensitizing agent
Assignee: Bayer AG
•
Filing: 1976-04-13
•
Granted: 1979-02-20
•
Expires: 1996-04-13
Abstract
Abstract Method for coagulating polymer dispersions with heat sensitizing agents which contain specific urethane groups. These new heat sensitizing agents provide at room temperature stable latices which coagulate completely when heated.
Inventors
- 👤 Hermann Perrey
- 👤 Martin Matner
- 👤 Gustav Sinn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:09
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/14; C08F6/22; C08C; C08C1/00; C08C1/14; C08C1/145; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/926
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
215 words
A method for coagulation of a polymer dispersion wherein a dispersion of a polymer selected from the group consisting of natural rubber latex and synthetic latices obtained by the polymerization of olefinic unsaturated monomers in aqueous solution is coagulated in the presence of a heat sensitizing agent of the formula R.sup.1 [--NHCO--O--CHR.sup.2 --CHR.sup.3).sub.x --O--CHR.sup.4 --CHR.sup.5).sub.y --R.sup.6 ].sub.n wherein R 1 is a member selected from the group consisting of saturated aliphatic hydrocarbon moiety having 1-18 carbon atoms and a valency equal to n, a saturated cycloaliphatic hydrocarbon having 5 to 6 carbon atoms and a valency equal to n, an aromatic hydrocarbon radical having 6-10 carbon atoms and a valency equal to n, said cycloaliphatic radical substituted by chlorine or alkyl having 1-4 carbon atoms and said aromatic radical substituted by chlorine or alkyl having 1-4 carbon atoms; n is a number from 1 to 20; R 2 , r 3 , r 4 and R 5 are independently of one another members selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, chloromethyl and phenyl; x is a number from 1 to 100; y is a number from 0 to 50; and R 6 is a member selected from the group consisting of aryloxy, aralkoxy, alkaryloxy, alkanoyloxy, aroyloxy, alkylamido, alkylsulfonamido and alkoxy.
Claim 2
Independent Claim
215 words
A method for coagulation of a polymer dispersion wherein a dispersion of a polymer selected from the group consisting of natural rubber latex and synthetic latices obtained by the polymerization of olefinic unsaturated monomers in aqueous solution is coagulated in the presence of a heat sensitizing agent of the formula R.sup.1 [--NHCO--O--CHR.sup.2 --CHR.sup.3).sub.x --O--CHR.sup.4 --CHR.sup.5).sub.y --R.sup.6 ].sub.n wherein R 1 is a member selected from the group consisting of saturated aliphatic hydrocarbon moiety having 1-18 carbon atoms and a valency equal to n, a saturated cycloaliphatic hydrocarbon having 5 to 6 carbon atoms and a valency equal to n, an aromatic hydrocarbon radical having 6-10 carbon atoms and a valency equal to n, said cycloaliphatic radical substituted by chlorine or alkyl having 1-4 carbon atoms and said aromatic radical substituted by chlorine or alkyl having 1-4 carbon atoms; n is a number from 1 to 20; R 2 , r 3 , r 4 and R 5 are independently of one another members selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, chloromethyl and phenyl; x is a number from 1 to 100; y is a number from 0 to 50; and R 6 is a member selected from the group consisting of aryloxy, aralkoxy, alkaryloxy, alkanoyloxy, aroyloxy, alkylamido, alkylsulfonamido and alkoxy.
Claim 3
Dependent Claim
82 words
A method as claimed in claim 1 wherein R 1 is an alkyl with 1 to 18 carbon atoms, cycloalkyl with 5 to 6 ring carbon atoms, phenyl or naphthyl and R 6 is selected from the group consisting of alkoxy, alkanoyloxy, alkylamido, alkylsulfonamido, each having alkyl with 1-30 carbon atoms, phenoxy, naphthoxy, phenoxy substituted by alkyl having 1-4 carbon atoms, chlorine, alkoxy having 1-4 carbon atoms or hydroxy, aralkoxy having 6-15 alkyl carbon atoms and alkaryloxy having 6-15 alkyl carbon atoms.
Claim 4
Dependent Claim
31 words
A method as claimed in claim 2 wherein the hydrocarbon R 1 moiety additionally contains a moiety selected from the group consisting of urethane-, urea-, uretedion-, biuret- and isocyanuric acid ester.
Claim 5
Dependent Claim
114 words
A method as claimed in claim 1 wherein the heat sensitizing agent has the formula R.sup.1 [--NHCO--(O--CHR.sup.2 --CH.sub.2).sub.x --R.sup.6 ].sub.n wherein R 1 is alkyl having 1-18 carbon atoms and contains one or more members selected from the group consisting of urea radical, biuret radical, cycloalkyl, aryl, cycloalkyl substituted by methyl groups, and aryl substituted by methyl groups; n is the number from 3 to 10; R 2 represents hydrogen or methyl; x represents a number from 5 to 50 and R 6 represents alkoxy having 8 to 20 carbon atoms, alkanoyloxy having 8 to 20 carbon atoms in the alkyl radical or alkylphenoxy with 6 to 15 carbon atoms in the alkyl radical.
Claim 6
Dependent Claim
67 words
A method as claimed in claim 1 wherein coagulation is carried out in the presence of an amide of an acid selected from the group consisting of carbonic acid, thiocarbonic acid, carboxylic acid and thiocarboxylic acids with the amide nitrogen atom being unsubstituted or substituted by at least one member selected from the group consisting of alkyl having 1-4 carbon atoms, boric acid, and an oxalkylated polysiloxane.
Claim 7
Dependent Claim
21 words
A method as claimed in claim 5 wherein the amide is selected from the group consisting of urea, thiourea, and acetamide.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |