US3864181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymer foam compositions
Assignee: Pratt and Lambert Inc
•
Filing: 1973-03-19
•
Granted: 1975-02-04
•
Expires: 1993-03-19
Abstract
Abstract A composition and method for forming foamed polymers is provided. The compositions comprise a dispersion of microspheres in a solution of the polymer in a solvent. The compositions are applied to substrate, dried, and heated to expand the microspheres, thus formong a foamed polymer.
Inventors
- 👤 Leon E Wolinski
- 👤 Arthur R Endress
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:12
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/32; C08J9/04; Y; Y10; Y10S; Y10S277/00; Y10S277/931; Y10S277/933; Y10S277/935; Y10S277/944; Y10S285/00; Y10S285/91; Y10S428/00; Y10S428/904; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1007; Y10T156/1015; Y10T156/1052; Y10T156/1082; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249985
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
13 words
The method of claim 1 wherein said microspheres are insoluble in said solvent.
Claim 2
Dependent Claim
19 words
The method of claim 1 wherein said microspheres are coated with a compound which preferentially wets the surface thereof.
Claim 3
Dependent Claim
12 words
The method of claim 3 wherein said compound is an aliphatic alcohol.
Claim 4
Dependent Claim
11 words
The method of claim 4 wherein said alcohol is n-butyl alcohol.
Claim 5
Dependent Claim
23 words
The method of claim 1 wherein said microspheres are soluble in said solvent and are coated with a material insoluble in said solvent.
Claim 6
Dependent Claim
21 words
The method of claim 6 wherein said material is selected from the group consisting of polyamides, epoxies, ureaformaldehydes and phenol formaldehydes.
Claim 7
Dependent Claim
12 words
The method of claim 1 wherein said polymer is a coating polymer.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein said polymer is an adhesive polymer.
Claim 9
Dependent Claim
17 words
The method of claim 1 wherein said solvent is selected from water, alkanes, aromatics and aliphatic alcohols.
Claim 10
Independent Claim
98 words
A method of forming in situ a gasket between two opposing surfaces comprising forming a coating composition of a solution of a film-forming polymer in a solvent therefor, having dispersed in said solution about 0.25 to 45.0 weight percent, based on the weight of said film-forming polymer, of thermally expanded thermoplastic microspheres, applying said coating composition to a first one of said opposing surfaces, drying the coated surface to remove the solvent from the coating composition, joining said first surface coated with the said coating composition and the second said opposing surface, and heating to expand the microspheres.
Claim 11
Dependent Claim
13 words
The method of claim 11 wherein said microspheres are insoluble in said solvent.
Claim 12
Dependent Claim
19 words
The method of claim 11 wherein said microspheres are coated with a compound which preferentially wets the surface thereof.
Claim 13
Dependent Claim
12 words
The method of claim 13 wherein said compound is an aliphatic alcohol.
Claim 14
Dependent Claim
11 words
The method of claim 14 wherein said alcohol is n-butyl alcohol.
Claim 15
Dependent Claim
23 words
The method of claim 11 wherein said microspheres are soluble in said solvent and are coated with a material insoluble in said solvent.
Claim 16
Dependent Claim
21 words
The method of claim 6 wherein said material is selected from the group consisting of polyamides, epoxies, ureaformaldehydes and phenols formaldehydes.
Claim 17
Dependent Claim
12 words
The method of claim 11 wherein said polymer is a coating polymer.
Claim 18
Dependent Claim
12 words
The method of claim 11 wherein said polymer is an adhesive polymer.
Claim 19
Dependent Claim
17 words
The method of claim 11 wherein said solvent is selected from water, alkanes, aromatics and aliphatic alcohols.
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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |