Dense star polymers having core, core branches, terminal groups

Details Dense star polymers having core, core branches, terminal groups Dense star polymers having core, core branches, terminal groups

1983-01-07

1985-03-26

Anderson, Harold D.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From carboxylic acid or derivative thereof

525451, 528310, 528328, 528363, C08G 6900

Patent

active

045074666

ABSTRACT:
Dense star polymers having terminal group densities greater than conventional star polymers exhibit greater and more uniform reactivity than their corresponding conventional star polymers. For example, a third generation, amine-terminated polyamidoamine dense star polymer prepared from ammonia, methyl acrylate and ethylenediamine has 1.24.times.10.sup.-4 amine moieties per unit volume (cubic Angstrom units) in contrast to the 1.58.times.10.sup.-6 amine moieties per unit volume contained by a conventional star polymer. Such dense star polymers are useful as demulsifiers for oil/water emulsions, wet strength agents in the manufacture of paper, and agents for modifying viscosity in aqueous formulations such as paints.

REFERENCES:
patent: 3528928 (1970-09-01), Rushton
patent: 3578643 (1971-05-01), Wood et al.
patent: 3580891 (1971-05-01), Rainer
patent: 3773739 (1973-11-01), Bonvicini et al.
patent: 4102827 (1978-07-01), Rembaum et al.
patent: 4289872 (1981-09-01), Denkewalter et al.
patent: 4435548 (1984-03-01), Tomalia et al.
Bauer et al.-Rubber Chem. Tech., 1978, 51(3), pp. 406-436.
Bywater-Adv. Poly. Sci, 30, (1979), pp. 89-116.
Luxton et al.-Polymer, (1978), vol. 19, pp. 1320-1324.
Yen et al.-Poly. Sci. Tech., 2, (1973), pp. 291-312.

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