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US4104228A
Expired / Lapsed
US
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Linear, partially deacylated poly(N-acyl)alkylenimines as tannin migration inhibitors
Assignee: Dow Chemical Co
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Filing: 1976-12-27
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Granted: 1978-08-01
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Expires: 1996-12-27
Abstract
Abstract Tannin migration through a latex paint applied to a tannin-containing wood surface is inhibited by applying to the wood surface a linear, partially deacylated poly(N-acyl)alkylenimine, such as poly(N-propionyl)ethylenimine. The poly(N-acyl)alkylenimine can be applied to the wood surface either prior to or concurrently with the latex paint.
Inventors
- 👤 Victor E. Meyer
- 👤 Kenneth M. Kem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:32
CPC Classifications
C; C09; C09D; C09D5/00; C09D5/02; C09D5/024; C08; C08G; C08G73/00; C08G73/02; C08G73/0233; C09D7/00; C09D7/40; C09D7/65; C08L; C08L79/00; C08L79/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31971; Y10T428/31989
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
50 words
A method of inhibiting tannin migration through a latex paint applied to a tannin-containing wood surface, the method comprising applying to the wood surface a latex paint blended with an inhibiting amount of a linear, water-soluble, partially deacylated poly(N-acyl)alkylenimine having a weight average molecular weight of at least about 10,000.
Claim 2
Independent Claim
50 words
A method of inhibiting tannin migration through a latex paint applied to a tannin-containing wood surface, the method comprising applying to the wood surface a latex paint blended with an inhibiting amount of a linear, water-soluble, partially deacylated poly(N-acyl)alkylenimine having a weight average molecular weight of at least about 10,000.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein between about 0.5 and about 5 weight percent, inclusive, of the poly(N-acyl)alkylenimine is blended with the latex paint.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein between about 1 and about 2 weight percent, inclusive, of the poly(N-acyl)alkylenimine is blended with the latex paint.
Claim 5
Dependent Claim
20 words
The method of claim 2 wherein the poly(N-acyl)alkylenimine has a weight average molecular weight between about 20,000 and about 400,000.
Claim 6
Dependent Claim
20 words
The method of claim 3 wherein the poly(N-acyl)alkylenimine has a weight average molecular weight between about 40,000 and about 200,000.
Claim 7
Dependent Claim
18 words
The method of claim 4 wherein the poly(N-acyl)alkylenimine is between about 10 percent and about 80 percent deacylated.
Claim 8
Dependent Claim
18 words
The method of claim 6 wherein the poly(N-acyl)alkylenimine is between about 15 percent and about 40 percent deacylated.
Claim 9
Dependent Claim
54 words
The method of claim 6 wherein the poly(N-acyl)alkylenimine consists essentially of repeating units of the formula ##STR4## wherein R' is hydrogen or R, and R is an alkyl or an inertly substituted alkyl radical of 1-3 carbon atoms and the combined alkyl carbon content of R and R' does not exceed 4 carbon atoms.
Claim 10
Dependent Claim
9 words
The method of claim 8 wherein R' is hydrogen.
Claim 11
Dependent Claim
11 words
The method of claim 9 wherein R is ethyl or propyl.
Claim 12
Dependent Claim
10 words
The method of claim 10 wherein the poly(N-acyl)alkylenimine is poly(N-propionyl)ethylenimine.
Claim 13
Dependent Claim
19 words
The method of claim 11 wherein the latex paint is based upon polymeric esters of acrylic and/or methacrylic acid.
References Cited (Backward Citations)
US3483141A
Cited
US3373194A
Cited
US3450557A
Cited
US3483145A
Cited
US3847857A
Cited
US3597265A
Cited
US3758641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |