. Reaction of Carboxyl Containing Polymers with Isocyanate Groups

26 июня, 2015

Malyar

Figure 1-40

(vii) Reaction of Carboxyl Containing Polymers with Alkoxyl Methyl Ether Groups

G-OH + RO — CH2— NH —I —► C — 0 — CH2— NH —| + ROH

0 0

Polymer backbone шштт Acrylic polymer backbone AAArV

Figure 1-41

Where RO-CH2-NH- may be the alkoxy methyl ether of an acrylamide polymer or of a melamine or urea formaldehyde resins.

Figure 1-42

(x) Reaction of Glycidyl Containing Polymers with Amine Groups

Polymer backbone

Figure 1-43

This reaction can be used as an alternative way of introducing a hydroxyl group to an acrylic polymer backbone. They are of particular interest where the use of a hydroxy monomer is not technically feasible. They can also be of use in circumstances where a more even distribution of the OH groups along the polymer backbone is desired, since the distribution using this technique can often be more uniform than when a hydroxy monomer is used to introduce OH functionality.