US3706683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross-linked nitrogen- and chlorine-containing cellular plastics and a method for the preparation thereof
Assignee: BASF Corp
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Filing: 1971-02-26
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Granted: 1972-12-19
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Expires: 1991-02-26
Abstract
Abstract Cross-linked cellular plastics having either open or closed cell structures are prepared from chloronitrosylated hydrocarbon polymers, having a chlorine content of from 0.5 to 73 percent by weight and a nitrogen content of from 0.01 to 5 percent by weight. The resulting cellular plastics possess improved physical properties.
Inventors
- 👤 Herwart C Vogt
- 👤 Pauls Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:48
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/12; C08J9/14; C08F; C08F8/00; C08F8/30; C08J9/06; Y; Y10; Y10S; Y10S264/00; Y10S264/13
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
13 words
The cellular plastic of claim 1 wherein the chloronitrosylated polymer is chloronitrosylated polyethylene.
Claim 2
Dependent Claim
14 words
The cellular plastic of claim 1 wherein the chloronitrosylated polymer is chloronitrosylated, chlorinated polyethylene.
Claim 3
Dependent Claim
12 words
The cellular plastic of claim 1 wherein the blowing agent is azodicarbonamide.
Claim 4
Dependent Claim
13 words
The cellular plastic of claim 1 wherein the blowing agent is p,p''-oxybis(benzenesulfonly hydrazide).
Claim 5
Dependent Claim
15 words
The cellular plastic of claim 1 wherein heating occurs in the presence of an accelerator.
Claim 6
Dependent Claim
12 words
The cellular plastic of claim 6 wherein the accelerator is magnesium oxide.
Claim 7
Dependent Claim
14 words
The cellular plastic claim 1 wherein heating occurs in the presence of a plasticizer.
Claim 8
Dependent Claim
21 words
The cellular plastic of claim 8 wherein the plasticizer is selected from the group consisting of chlorinated biphenyl, dioctylphthalate and tricresylphosphate.
Claim 9
Dependent Claim
66 words
A process for the preparation of a cross-linked cellular plastic comprising heating at a temperature of from 50* to 250* C. in the presence of a blowing agent a chloronitrosylated polymer selected from the group consisting of polyolefins and chlorinated polyolefins and having a chlorine content of from 0.05 to 73 percent by weight and a nitrogen content of from 0.01 to 5 percent by weight.
Claim 10
Dependent Claim
12 words
The process of claim 10 wherein the chloronitrosylated polymer is chloronitrosylated polyethylene.
Claim 11
Dependent Claim
13 words
The process of claim 10 wherein the chloronitrosylated polymer is chloronitrosylated, chlorinated polyethylene.
Claim 12
Dependent Claim
11 words
The process of claim 10 wherein the blowing agent is azodicarbonamide.
Claim 13
Dependent Claim
12 words
The process of claim 10 wherein the blowing agent is p,p''-oxybis(benzensulfonly hydrazide).
Claim 14
Dependent Claim
14 words
The process of claim 10 wherein heating occurs in the presence of an accelerator.
Claim 15
Dependent Claim
11 words
The process of claim 10 wherein the accelerator is magnesium oxide.
Claim 16
Dependent Claim
14 words
The process of claim 10 wherein heating occurs in the presence of a plasticizer.
Claim 17
Dependent Claim
20 words
The process of claim 17 wherein the plasticizer is selected from the group consisting of chlorinated biphenyl, dioctylphthalate and tricresylphosphate.
References Cited (Backward Citations)
US3498934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |