Patent US458868A successfully refreshed from Google Patents.
Patent US4478061A successfully refreshed from Google Patents.
Patent US3923754A successfully refreshed from Google Patents.
US3923754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing of liquid polythiopolymercaptan polymers
Assignee: Denton Industries Inc
•
Filing: 1974-10-29
•
Granted: 1975-12-02
•
Expires: 1994-10-29
Abstract
Abstract Liquid organic polythiopolymercaptan polymers are cured at ambient temperature conditions within a time span not exceeding about 15 minutes to produce light colored, solid, elastomeric products by employing, as the curing agent, at least 20 parts by weight of a polysulfide constituent such as alkyl thiuram polysulfide and/or benzothiazyl disulfide in combination with at least 20 parts by weight of a zinc constituent such as zinc oxide and/or zinc peroxide, with the amount of each of the polysulfide and zinc constituents being based upon about 100 parts, by weight, of the polymer.
Inventors
- 👤 Michael A Pellico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:56
CPC Classifications
C; C08; C08L; C08L81/00; C08L81/04; A; A61; A61K; A61K6/00; A61K6/90
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
100 words
A METHOD OF CURING A LIQUID ORGANIC POLYTHIOPOLYMERCAPTAN POLYMER AT AMBIENT TEMPERATURE WITHIN A TIME SPAN NOT EXCEEDING ABOUT 15 MINUTES WHICH COMPRISES INTERACTING THE POLYMER AT AMBIENT TEMPERATURE WITH A. AT LEAST 20 PARTS BY WEIGHT OF A ZINC CONSTITUENT SELECTED FROM THE CLASS OF ZINC OXIDE, ZINC PEROXIDE AND MIXTURES THEREOF, AND B. AT LEAST 20 PARTS BY WEIGHT OF A POLYSULFIDE CONSTITUENT SELECTED FROM THE CLASS OF ALKYL THIURAM POLYSULFIDE, BENZOTHIAZYL DISULFIDE AND MIXTURES THEREOF, WITH THE AMOUNT OF EACH OF THE ZINC AND POLYSULFIDE CONSTITUENTS BEING BASED UPON ABOUT 100 PARTS, BY WEIGHT, OF THE POLYMER.
Claim 2
Independent Claim
100 words
A METHOD OF CURING A LIQUID ORGANIC POLYTHIOPOLYMERCAPTAN POLYMER AT AMBIENT TEMPERATURE WITHIN A TIME SPAN NOT EXCEEDING ABOUT 15 MINUTES WHICH COMPRISES INTERACTING THE POLYMER AT AMBIENT TEMPERATURE WITH A. AT LEAST 20 PARTS BY WEIGHT OF A ZINC CONSTITUENT SELECTED FROM THE CLASS OF ZINC OXIDE, ZINC PEROXIDE AND MIXTURES THEREOF, AND B. AT LEAST 20 PARTS BY WEIGHT OF A POLYSULFIDE CONSTITUENT SELECTED FROM THE CLASS OF ALKYL THIURAM POLYSULFIDE, BENZOTHIAZYL DISULFIDE AND MIXTURES THEREOF, WITH THE AMOUNT OF EACH OF THE ZINC AND POLYSULFIDE CONSTITUENTS BEING BASED UPON ABOUT 100 PARTS, BY WEIGHT, OF THE POLYMER.
Claim 3
Dependent Claim
38 words
The method of claim 1 wherein the amount of the zinc constituent is from 20 to about 60 parts by weight and the amount of the polysulfide constituent is from about 20 to about 40 parts by weight.
Claim 4
Dependent Claim
21 words
The method of claim 1 wherein the amount of the polysulfide constituent is from 20 to about 30 parts by weight.
Claim 5
Dependent Claim
22 words
The method of claim 3 wherein the amount of the zinc constituent is from about 25 to about 55 parts by weight.
Claim 6
Dependent Claim
22 words
The method of claim 3 wherein the amount of the zinc constituent is from about 35 to about 45 parts by weight.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein the polymer has an average molecular weight from about 500 to about 25,000.
Claim 8
Dependent Claim
19 words
The method of claim 1 wherein the polymer has an average molecular weight from about 1,000 to about 8,000.
Claim 9
Dependent Claim
19 words
The method of claim 1 wherein the polymer has an average molecular weight from about 3,000 to about 5,000.
Claim 10
Dependent Claim
45 words
The method of claim 1 wherein the polymer has an average molecular weight of about 4,000 and contains from about 0.5 to about 2.0 mol percent trifunctional groups for cross-linking and is represented by the formula HS(RSS)23SH in which R represents the organic group (C2H4-O-CH2-O-C2H4)
Claim 11
Dependent Claim
19 words
The method of claim 1 wherein the polysulfide constituent is represented as alkyl thiuram polysulfide represented by the formula
Claim 12
Dependent Claim
11 words
A cured, elastomeric product made by the process of claim 1.
Claim 13
Dependent Claim
120 words
A two-component system, wherein the components are adapted to interact at ambient temperature to form a cured, elastomeric product within a time span not exceeding about 15 minutes, comprising: component A containing a liquid organic polythiopolymercaptan polymer; component B containing at least 20 parts by weight of a zinc constituent selected from the class of zinc oxide, zinc peroxide and mixtures thereof; and at least 20 parts by weight of a polysulfide constituent selected from the class of alkyl thiuram polysulfide, benzothiazyl disulfide and mixtures thereof, said polySulfide constituent being present in at least one of said components; with the amount of each of the zinc and polysulfide constituents being based upon about 100 parts, by weight, of the polymer.
Claim 14
Dependent Claim
120 words
A two-component system, wherein the components are adapted to interact at ambient temperature to form a cured, elastomeric product within a time span not exceeding about 15 minutes, comprising: component A containing a liquid organic polythiopolymercaptan polymer; component B containing at least 20 parts by weight of a zinc constituent selected from the class of zinc oxide, zinc peroxide and mixtures thereof; and at least 20 parts by weight of a polysulfide constituent selected from the class of alkyl thiuram polysulfide, benzothiazyl disulfide and mixtures thereof, said polySulfide constituent being present in at least one of said components; with the amount of each of the zinc and polysulfide constituents being based upon about 100 parts, by weight, of the polymer.
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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |