US4500689A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low cost polyester modified phenolic resin containing a combination of long and short chain alkylphenols
Assignee: Westinghouse Electric Corp
•
Filing: 1983-12-30
•
Granted: 1985-02-19
•
Expires: 2003-12-30
Abstract
Abstract A low cost resinous insulating solution is made by blending a polyester resin with a solution of a reaction product admixture containing long chain alkyl phenol, short chain alkyl phenol, crosslinking agent, aldehyde and alkali catalyst.
Inventors
- 👤 Charles H. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:20
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/42; C; C08; C08G; C08G18/00; C08G18/04; C08G8/00; C08G8/04; C08L; C08L61/00; C08L61/04; C08L61/06; C08L67/00; H01B3/36; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31688
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A resinous insulating solution comprising: (A) polyester resin solution, and (B) a solution of a reaction product of a combination of: (1) long chain alkyl phenol, where alkyl contains from 8 to 10 carbon atoms, combined with short chain alkyl phenol, where alkyl contains from 3 to 6 carbon atoms, where the combination contains from about 20 wt.% to about 75 wt.% of long chain alkyl phenol, (2) crosslinking agent selected from the group consisting of cresylic acid, phenol, and mixtures thereof, (3) aldehyde, and (4) alkali catalyst, where polyester resin solids comprise from about 25 solids weight percent to about 75 solids weight percent of the insulating solution.
Claim 2
Dependent Claim
109 words
A resinous insulating solution comprising: (A) polyester resin solution, and (B) a solution of a reaction product of a combination of: (1) long chain alkyl phenol, where alkyl contains from 8 to 10 carbon atoms, combined with short chain alkyl phenol, where alkyl contains from 3 to 6 carbon atoms, where the combination contains from about 20 wt.% to about 75 wt.% of long chain alkyl phenol, (2) crosslinking agent selected from the group consisting of cresylic acid, phenol, and mixtures thereof, (3) aldehyde, and (4) alkali catalyst, where polyester resin solids comprise from about 25 solids weight percent to about 75 solids weight percent of the insulating solution.
Claim 3
Dependent Claim
37 words
The resinous solution of claim 1, where alkyl, in the long chain alkyl phenol, contains 9 carbon atoms, alkyl, in the short chain alkyl phenol, contains 4 carbon atoms, and the alkali catalyst is an alkali hydroxide.
Claim 4
Dependent Claim
134 words
A resinous, insulating solution comprising: (A) saturated polyester resin solution, and (B) a solution of a reaction product of a combination of: (1) long chain alkyl phenol, where alkyl contains from 8 to 10 carbon atoms, combined with short chain alkyl phenol, where alkyl contains from 3 to 6 carbon atoms, where the combination contains from about 20 wt.% to about 75 wt.% of long chain alkyl phenol, (2) crosslinking agent selected from the group consisting of cresylic acid, phenol, and mixtures thereof, (3) aldehyde, and (4) alkali hydroxide catalyst, where components (1), (2), (3), and (4) of the reaction product are reacted, cooled, and acidified, after which organic solvent is added, and where polyester resin solids comprise from about 25 solids weight percent to about 75 solids weight percent of the insulating solution.
Claim 5
Dependent Claim
134 words
A resinous, insulating solution comprising: (A) saturated polyester resin solution, and (B) a solution of a reaction product of a combination of: (1) long chain alkyl phenol, where alkyl contains from 8 to 10 carbon atoms, combined with short chain alkyl phenol, where alkyl contains from 3 to 6 carbon atoms, where the combination contains from about 20 wt.% to about 75 wt.% of long chain alkyl phenol, (2) crosslinking agent selected from the group consisting of cresylic acid, phenol, and mixtures thereof, (3) aldehyde, and (4) alkali hydroxide catalyst, where components (1), (2), (3), and (4) of the reaction product are reacted, cooled, and acidified, after which organic solvent is added, and where polyester resin solids comprise from about 25 solids weight percent to about 75 solids weight percent of the insulating solution.
Claim 6
Dependent Claim
30 words
The resinous solution of claim 3, where alkyl, in the long chain alkyl phenol, contains 9 carbon atoms, and alkyl, in the short chain alkyl phenol, contains 4 carbon atoms.
Claim 7
Dependent Claim
49 words
The resinous solution of claim 3, where the crosslinking agent is selected from the group consisting of cresylic acid having a high percentage of meta cresol, phenol, and mixtures thereof, the aldehyde is formaldehyde, the alkali catalyst is sodium hydroxide, and the reaction product is acidified with sulfuric acid.
Claim 8
Dependent Claim
30 words
The resinous solution of claim 3, where the aldehyde is aqueous formaldehyde, the reaction product is cooled with water, and where, after the reaction product is acidified, water is removed.
Claim 9
Dependent Claim
36 words
The resinous solution of claim 3, mixed with up to about 6 weight percent, based on the solids of the resinous solution, with a resin selected from the group consisting of melamine-formaldehyde resin and ureaformaldehyde resin.
Claim 10
Dependent Claim
18 words
The resinous solution of claim 3, coated and cured on an article to provide an electrical insulation layer.
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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |