Branched polyamidoamines

• US 4,435,548 A
• Filed: 04/27/1981
• Issued: 03/06/1984
• Est. Priority Date: 04/27/1981
• Status: Expired due to Term

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: Conklin, Jerry R., Tomalia, Donald A., Wilson, Larry R.
• Primary Examiner(s): Bleutge, John C.
• Assistant Examiner(s): SELLERS, ROBERT E
• Application Number:
  US06/258,158
• Time in Patent Office: 1,044 Days
• Field of Search: 528/332, 528/363, 525/451
• US Class Current: 525/451
• CPC Class Codes: C08G 69/00 Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule products obtained from isocyanates or isothiocyanates C08G18/00; polyamide-imides C08G73/14
• CPC Class Codes: C08G 73/0286 Preparatory process from polyamidoamines and epihalohydrins
• CPC Class Codes: D21H 17/55 Polyamides; Polyaminoamides; Polyester-amides

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.

Claims

1. 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 CH₃ ;

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 C₁ to C₄ alkyl, or a C₁ to C₄ hydroxyalkyl.

2. The polyamidoamine as described in claim 1 wherein B is CH_2x NR'"'"'_y and x and m are each independently 2 or 3.

3. The polyamidomine as described in claim 2 wherein y and n are each independently 1 or 2.

4. The polyamidoamine as described in claim 3 wherein R'"'"' at each occurrence is independently --H, --CH₃ or --CH₂ OH.

5. The polyamidoamine as described in claim 4 wherein x and m are each 2, y and n are each 1, R'"'"' is --CH₃ at each occurrence and R is H at each occurrence.

6. 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.

7. 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, --CH₃ or --CH₂ OH.