US3986989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular vinyl halide resin compositions and a process for their production
Assignee: Argus Chemical Corp
•
Filing: 1974-08-28
•
Granted: 1976-10-19
•
Expires: 1994-08-28
Abstract
Abstract Cellular vinyl halide resin compositions are prepared by adding to a vinyl halide resin plastisol a chemical blowing agent, such as azodicarbonamide, and an activator for the blowing agent that contains a zinc salt and a strontium salt and heating the resulting composition at a temperature at which the blowing agent will decompose and the vinyl halide resin will fuse.
Inventors
- 👤 Milton Freifeld
- 👤 Robert E. Lally
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/04; C08J9/06; C08J9/10; C08J9/102; C08J9/103; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; Y; Y10; Y10S; Y10S521/00; Y10S521/909
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
137 words
A composition suitable for the production of cellular vinyl halide resins that comprises (a) a vinyl halide resin plastisol, (b) 1 percent to 10 percent, based on the weight of vinyl halide resin in the plastisol, of azodicarbonamide, and (c) 1 percent to 5 percent, based on the weight of vinyl halide resin in the plastisol, of an activator mixture that contains (1) at least one zinc salt selected from the group consisting of zinc salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols and (2) at least one strontium salt selected from the group consisting of strontium salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols, said activator mixture containing from 0.1 part to 10 parts by weight of strontium salt per part by weight of zinc salt.
Claim 2
Dependent Claim
137 words
A composition suitable for the production of cellular vinyl halide resins that comprises (a) a vinyl halide resin plastisol, (b) 1 percent to 10 percent, based on the weight of vinyl halide resin in the plastisol, of azodicarbonamide, and (c) 1 percent to 5 percent, based on the weight of vinyl halide resin in the plastisol, of an activator mixture that contains (1) at least one zinc salt selected from the group consisting of zinc salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols and (2) at least one strontium salt selected from the group consisting of strontium salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols, said activator mixture containing from 0.1 part to 10 parts by weight of strontium salt per part by weight of zinc salt.
Claim 3
Dependent Claim
15 words
A composition as defined in claim 1 wherein the vinyl halide resin is polyvinyl chloride.
Claim 4
Dependent Claim
30 words
A composition as defined in claim 1 wherein the activator mixture contains from 0.2 part to 1 part by weight of strontium salt per part by weight of zinc salt.
Claim 5
Dependent Claim
42 words
A composition as defined in claim 1 that contains from 2 parts to 5 parts by weight of azodicarbonamide and from 2 parts to 4 parts by weight of the activator mixture per 100 parts by weight of the vinyl halide resin.
Claim 6
Dependent Claim
27 words
A composition as defined in claim 1 that contains from 0.5 part to 1.5 parts by weight of the activator mixture per part by weight of azodicarbonamide.
Claim 7
Dependent Claim
17 words
A composition as defined in claim 1 wherein the activator mixture contains strontium 2-ethylhexoate and zinc 2-ethylhexoate.
Claim 8
Dependent Claim
152 words
In the process of producing cellular vinyl halide resin compositions by forming a plastisol containing a vinyl halide resin and azodicarbonamide and heating the plastisol to a temperature in the range of about 140°-210° C. to fuse the vinyl halide resin and to decompose the azodicarbonamide, the improvement that comprises incorporating in said mixture before heating 1 percent to 5 percent, based on the weight of vinyl halide resin in the plastisol of an activator mixture that contains (i) at least one zinc salt selected from the group consisting of zinc salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols and (ii) at least one strontium salt selected from the group consisting of strontium salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols, said activator containing from 0.1 part to 10 parts by weight of strontium salt per part by weight of zinc salt.
Claim 9
Dependent Claim
152 words
In the process of producing cellular vinyl halide resin compositions by forming a plastisol containing a vinyl halide resin and azodicarbonamide and heating the plastisol to a temperature in the range of about 140°-210° C. to fuse the vinyl halide resin and to decompose the azodicarbonamide, the improvement that comprises incorporating in said mixture before heating 1 percent to 5 percent, based on the weight of vinyl halide resin in the plastisol of an activator mixture that contains (i) at least one zinc salt selected from the group consisting of zinc salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols and (ii) at least one strontium salt selected from the group consisting of strontium salts of monocarboxylic acids having 6 to 24 carbon atoms, phenol, and alkylphenols, said activator containing from 0.1 part to 10 parts by weight of strontium salt per part by weight of zinc salt.
Claim 10
Dependent Claim
28 words
The process of claim 7 wherein the activator mixture contains from 0.2 part to 1 part by weight of strontium salt per part by weight of zinc salt.
Claim 11
Dependent Claim
31 words
The process of claim 7 wherein the amount of activator mixture added is from 2 parts to 4 parts by weight per 100 parts by weight of the vinyl halide resin.
Claim 12
Dependent Claim
15 words
The process of claim 7 wherein the activator mixture contains zinc 2-ethylhexoate and strontium 2-ethylhexoate.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |