Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1986-07-02
1987-12-01
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
5262922, 52629295, C08K 322
Patent
active
047105267
ABSTRACT:
A cement admixture which results in a cement mortar with excellent adhesion to various adherents and with excellent flexibility over a wide range of temperatures, including very low temperatures, contains cement, optionally but preferably sand, and an effective amount of an aqueous emulsion of a cationic acrylate polymer having a Tg between below 10.degree. C. and -40.degree. C. The polymer comprises (a) about 25 to 85% of an acrylate monomer (e.g., butyl acrylate, methylmethacrylate, or 2-ethylhexyl acrylate but not methyl or ethyl acrylate), (b) about 0.5-15% of an alkaline-curable cationic quaternary ammonium salt monomer, and optional monomer(s) other than (a) or (b). The alkaline-curable cationic quaternary ammonium salt units in the polymer are represented by the formula ##STR1## where R is hydrogen or a methyl group; R.sup.2 and R.sup.3 may be the same or different and are a methyl or ethyl group: A is --O-- or --NH--; X is chlorine, bromine, or iodine; Y is an organic or inorganic monovalent anion; and n is 2 or 3.
REFERENCES:
patent: 3694393 (1972-09-01), Lewis et al.
Gold Samuel
Iovine Carmine P.
Shitaoka Shizuo
Takagi Motoyuki
Tokumoto Minoru
Kelley Margaret B.
Michl Paul R.
National Starch and Chemical Corporation
Szala Edwin M.
Walker Alex H.
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