Patent US3717595A successfully refreshed from Google Patents.
US3717595A
Expired / Lapsed
US
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Cell stabilizer for vinyl resin foams
Assignee: Air Products and Chemicals Inc
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Filing: 1970-11-25
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Granted: 1973-02-20
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Expires: 1990-11-25
Abstract
Abstract Production of cellular vinyl foams having desirably low density, good physical characteristics, fine uniform cell structure and the capability for production with short cycle times is achieved by incorporating a new cell stabilizer additive in a foamable precursor composition, such as a plastisol comprising a vinyl resin, plasticizer and blowing agent. The cell stabilizer additive is one or more of the copolymers obtained by the copolymerization of (A) a monomeric C2 to C6 methacrylate and (B) a nitrogen-containing, ethylenically unsaturated monomer in an amount providing nitrogen in the copolymerizate in the range of 0.1 to 10 percent by weight.
Inventors
- 👤 E Huntzinger
- 👤 N Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:43
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0061; C08J2327/00; C08J2327/02; C08J2327/04; C08J2327/06; C08J2433/00; Y; Y10; Y10S; Y10S521/00; Y10S521/908
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
142 words
In the preparation of vinyl chloride foam bodies having good physical and mechanical properties by fusing at elevated temperature a precursor plastisol comprising vinyl chloride resin, plasticizer, blowing agent, and a cell stabilizer; the improvement wherein said cell stabilizer consists of at least one copolymer consisting essentially of A. an ester of methacrylic acid selected from the group consisting of propyl methacrylate, normal butyl methacrylate, isobutyl methacrylate and amyl methacrylate; and B. a nitrogen - containing ethylenically unsaturated monomer in an amount contributing 0.1 to 10% by weight nitrogen in the copolymerizate, said monomer selected from the group consisting of dimethyl aminoethyl methacrylate, diethyl aminoethyl methacrylate, 2-N-t-butylaminoethyl methacrylate, methacrylonitrile, diacetone acrylamide, N-methylolacrylamide and N-methylolmethacrylamide; said copolymer being present in the plastisol in an amount in the range of 0.05 to 2.0 parts by weight per 100 parts by weight of the resin.
Claim 2
Dependent Claim
142 words
In the preparation of vinyl chloride foam bodies having good physical and mechanical properties by fusing at elevated temperature a precursor plastisol comprising vinyl chloride resin, plasticizer, blowing agent, and a cell stabilizer; the improvement wherein said cell stabilizer consists of at least one copolymer consisting essentially of A. an ester of methacrylic acid selected from the group consisting of propyl methacrylate, normal butyl methacrylate, isobutyl methacrylate and amyl methacrylate; and B. a nitrogen - containing ethylenically unsaturated monomer in an amount contributing 0.1 to 10% by weight nitrogen in the copolymerizate, said monomer selected from the group consisting of dimethyl aminoethyl methacrylate, diethyl aminoethyl methacrylate, 2-N-t-butylaminoethyl methacrylate, methacrylonitrile, diacetone acrylamide, N-methylolacrylamide and N-methylolmethacrylamide; said copolymer being present in the plastisol in an amount in the range of 0.05 to 2.0 parts by weight per 100 parts by weight of the resin.
Claim 3
Dependent Claim
13 words
The cell stabilizer of claim 1 wherein said monomeric methacrylate is isobutyl methacrylate.
Claim 4
Dependent Claim
15 words
The cell stabilizer of claim 1 wherein said nitrogen-containing, ethylenically unsaturated monomer is 2-N-t-butylaminoethyl methacrylate.
Claim 5
Dependent Claim
29 words
The cell stabilizer of claim 3 wherein said nitrogen-containing, ethylenically unsaturated monomer contributes nitrogen in an amount in the range of 0.5 to 2.0% by weight of the polymerizate.
Claim 6
Dependent Claim
13 words
The cell stabilizer of claim 1 wherein said monomeric methacrylate is normal butylmethacrylate.
Claim 7
Dependent Claim
15 words
The cell stabilizer of claim 5 wherein the nitrogen-containing, ethylenically unsaturated monomer is 2-N-t-butylaminoethyl methacryLate.
Claim 8
Dependent Claim
80 words
Vinyl chloride bodies prepared by fusing a foamable precursor composition comprising a vinyl chloride resin and a cell stabilizer additive consisting of at least one copolymer consisting essentially of A. an ester of methacrylic acid selected from the group consisting of propyl methacrylate, normal butyl methacrylate, isobutyl methacrylate and amyl methacrylate; and B. a nitrogen - containing ethylenically unsaturated monomer selected from the group consisting of 2-N-t-butylaminoethyl methacrylate, dimethyl aminoethyl methacrylate, diethyl aminoethyl methacrylate, methacrylonitrile, diacetone acrylamide, N-methylolacrylamide and N-methylolmethacrylamide.
Claim 9
Dependent Claim
80 words
Vinyl chloride bodies prepared by fusing a foamable precursor composition comprising a vinyl chloride resin and a cell stabilizer additive consisting of at least one copolymer consisting essentially of A. an ester of methacrylic acid selected from the group consisting of propyl methacrylate, normal butyl methacrylate, isobutyl methacrylate and amyl methacrylate; and B. a nitrogen - containing ethylenically unsaturated monomer selected from the group consisting of 2-N-t-butylaminoethyl methacrylate, dimethyl aminoethyl methacrylate, diethyl aminoethyl methacrylate, methacrylonitrile, diacetone acrylamide, N-methylolacrylamide and N-methylolmethacrylamide.
Claim 10
Dependent Claim
22 words
Vinyl chloride foam bodies in accordance with claim 7 wherein said cell stabilizer is the copolymer of isobutyl methacrylate and 2-N-t-butylaminoethyl methacrylate.
Claim 11
Dependent Claim
43 words
Vinyl chloride foam bodies in accordance with claim 8 wherein said cell stabilizer is present in the foamable precursor composition in an amount in the range of 0.05 to 2 parts by weight per 100 parts by weight of said vinyl chloride resin.
Claim 12
Dependent Claim
30 words
Vinyl chloride foam bodies in accordance with claim 7 characterized by fine uniform cell structure with a cell count in the range of 100 to 300 cells per linear inch.
Claim 13
Dependent Claim
26 words
Vinyl chloride foam bodies in accordance with claim 10 characterized in having a density in the range of from 2.5 to 30 pounds per cubic foot.
Claim 14
Independent Claim
147 words
The method of preparing vinyl chloride foam bodies comprising a. formulating a precursor composition comprising vinyl chloride resin, plasticizer, and blowing agent, b. incorporating in the precursor composition as cell stabilizer, in the amount in the range of 0.05 to 2 parts by weight per 100 parts by weight of the vinyl chloride resin, consisting of at least one copolymer consisting essentially of A. a C3 to C5 methacrylate and B. a nitrogen-containing ethylenically unsaturated monomer providing nitrogen in the copolymerizate in the range of 0.1 to 10% by weight, selected from the group consisting of 2-N-t-butylaminoethyl methacrylate, dimethyl aminoethyl methacrylate, diethyl aminoethyl methacrylate, methacrylonitrile, diacetone acrylamide, N-methylolacrylamide and N-methylolmethacrylamide; c. heating the precursor composition having incorporated cell stabilizer and effecting transformation into cellular vinyl chloride foam, and d. recovering the cellular vinyl chloride foam having fine and uniform cell structure as the vinyl chloride foam bodies.
Claim 15
Independent Claim
147 words
The method of preparing vinyl chloride foam bodies comprising a. formulating a precursor composition comprising vinyl chloride resin, plasticizer, and blowing agent, b. incorporating in the precursor composition as cell stabilizer, in the amount in the range of 0.05 to 2 parts by weight per 100 parts by weight of the vinyl chloride resin, consisting of at least one copolymer consisting essentially of A. a C3 to C5 methacrylate and B. a nitrogen-containing ethylenically unsaturated monomer providing nitrogen in the copolymerizate in the range of 0.1 to 10% by weight, selected from the group consisting of 2-N-t-butylaminoethyl methacrylate, dimethyl aminoethyl methacrylate, diethyl aminoethyl methacrylate, methacrylonitrile, diacetone acrylamide, N-methylolacrylamide and N-methylolmethacrylamide; c. heating the precursor composition having incorporated cell stabilizer and effecting transformation into cellular vinyl chloride foam, and d. recovering the cellular vinyl chloride foam having fine and uniform cell structure as the vinyl chloride foam bodies.
References Cited (Backward Citations)
US3417038A
Cited
US3454507A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-20 | 1976-08-21 | 1977-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-20 | 1980-08-21 | 1981-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-20 | 1984-08-21 | 1985-02-20 | $7700.00 | Window Closed / Lapsed |