Novel polymeric foams and foaming compositions

Details Novel polymeric foams and foaming compositions Novel polymeric foams and foaming compositions

1985-12-12

1986-09-16

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 72, 521149, C08J 930

Patent

active

046123326

ABSTRACT:
Surfactant-free stable aqueous foams may be produced by water soluble copolymers of acrylamide and N-alkylacrylamide with chain lengths greater than or equal to 6 carbons. Additionally, these polymers may contain an anionic monomer, such as a monovalent salt of acrylic acid. These copolymers and terpolymers are added to water or brine at a concentration of 0.005 to 2 parts per 100 of solvent. When the resulting solutions are subjected to intensive mixing with the addition of air or other gases, such as nitrogen or carbon dioxide, high quality, persistent foams are formed. These foams are formed at relatively low polymer concentrations without added surfactants. They have good high temperature stability and excellent salt tolerance.

REFERENCES:
patent: 3032516 (1962-05-01), Burkhard et al.
patent: 3577554 (1971-05-01), Parrish et al.
patent: 3663462 (1972-05-01), Arndt et al.
patent: 3714078 (1973-01-01), Gordon et al.
patent: 3931086 (1976-01-01), Lindemann
patent: 4353993 (1982-10-01), McCrossin
patent: 4417016 (1983-11-01), Cline et al.

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