US4435548A
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Branched polyamidoamines
Assignee: Dow Chemical Co
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Filing: 1981-04-27
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Granted: 1984-03-06
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Expires: 2001-04-27
Abstract
Abstract Branched polyamidoamines bearing a plurality of pendant aminoamide moieties exhibit properties which are superior to the linear polyamidoamines from which the branched polymers are derived. The branched polyamidoamine is readily prepared by reacting a linear polyamidoamine with an alkyl acrylate or methacrylate to prepare a polymer with pendant ester moieties. The ester moieties are then reacted with an alkylene diamine or a polyalkylene polyamine to produce the pendant aminoamide groups.
Inventors
- 👤 Donald A. Tomalia
- 👤 Larry R. Wilson
- 👤 Jerry R. Conklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:51
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/54; D21H17/55; C; C08; C08G; C08G69/00; C08G73/00; C08G73/02; C08G73/028; C08G73/0286
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
A branched polyamidoamine having a weight average molecular weight of at least about 550 and consisting essentially of units corresponding to the formula I ##STR8## wherein R at each occurrence is independently --H or 13 CH 3 ; A is ##STR9## m is an integer from 2 to about 10 and n is an integer from 1 to about 6; D at each occurrence is independently --H or corresponds to formula II ##STR10## with the proviso that at least about 10 percent of the groups represented by D correspond to formula II; B is CH 2x NR' y or ##STR11## x is an integer from 2 to about 10 and y is an integer from 1 to about 6; R' at each occurrence is independently --H, a C 1 to C 4 alkyl, or a C 1 to C 4 hydroxyalkyl.
Claim 2
Dependent Claim
141 words
A branched polyamidoamine having a weight average molecular weight of at least about 550 and consisting essentially of units corresponding to the formula I ##STR8## wherein R at each occurrence is independently --H or 13 CH 3 ; A is ##STR9## m is an integer from 2 to about 10 and n is an integer from 1 to about 6; D at each occurrence is independently --H or corresponds to formula II ##STR10## with the proviso that at least about 10 percent of the groups represented by D correspond to formula II; B is CH 2x NR' y or ##STR11## x is an integer from 2 to about 10 and y is an integer from 1 to about 6; R' at each occurrence is independently --H, a C 1 to C 4 alkyl, or a C 1 to C 4 hydroxyalkyl.
Claim 3
Dependent Claim
24 words
The polyamidoamine as described in claim 1 wherein B is CH 2x NR' y and x and m are each independently 2 or 3.
Claim 4
Dependent Claim
17 words
The polyamidomine as described in claim 2 wherein y and n are each independently 1 or 2.
Claim 5
Dependent Claim
21 words
The polyamidoamine as described in claim 3 wherein R' at each occurrence is independently --H, --CH 3 or --CH 2 OH.
Claim 6
Dependent Claim
34 words
The polyamidoamine as described in claim 4 wherein x and m are each 2, y and n are each 1, R' is --CH 3 at each occurrence and R is H at each occurrence.
Claim 7
Dependent Claim
29 words
The polyamidoamine as described in claim 4 wherein x and m are each 2, y and n are each 1 and R' and R are H at each occurrence.
Claim 8
Dependent Claim
56 words
The branched polyamidoamine of claim 1 which consists essentially of units corresponding to the formula: ##STR12## wherein m is 2 or 3, n is 1 or 2 and D at each occurrence is independently --H or ##STR13## wherein x is 2 or 3 and R' at each occurrence is --H, --CH 3 or --CH 2 OH.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |