Alkyl aryl ketone/formaldehyde resin having high softening point
AssigneeHuels Aktiengesellschaft
InventorJorg Dorffel
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Abstract
Condensation resins obtained by the polycondensation of alkyl aryl ketones and formaldehyde, wherein the polycondensation mixture contains 0.05 to 5% by weight, based on the alkyl aryl ketone, of an activator having the formula (A) ##STR1## wherein X is a nitrogen or phosphorus atom; R.sub.1, R.sub.2 and R.sub.3 are each independently a C.sub.1-3 -alkyl group or a phenyl group; and Y.sup.- is the anion of an inorganic or organic acid, have higher softening points than resins prepared by analogous processes but without the activator.
Claims26
A C.sub.1-6 -alkyl C.sub.6-10 -aryl ketone/formaldehyde resin having a softening point of at least 90.degree. C.
In a liquid phase process for producing an alkyl aryl ketone/formaldehyde resin, wherein an alkyl aryl ketone is polycondensed with formaldehyde in a molar ratio of 0.9:1 to 1.3:1 in liquid phase, in the presence of an alkali metal hydroxide, the improvement wherein said polycondensation is effected in the presence of a quaternary ammonium or phosphonium activator having the formula [R.sup.1 R.sup.2 R.sup.3 XCH.sub.2 C.sub.6 H.sub.5]+ Y-, wherein X is a nitrogen or phosphorus atom;
- R.sup.1, R.sup.2 and R.sup.3 are each independently a C.sub.1-3 -alkyl group or a phenyl group;
- and Y- is the anion of an inorganic or organic acid;
- and wherein the amount of said activator is 0.05-5% by weight, relative to the weight of said ketone.
A composition comprising a C.sub.1 -C.sub.6 -alkyl C.sub.6 -C.sub.10 -aryl ketone, formaldehyde, an alkali metal hydroxide, and a quaternary ammonium or phosphonium activator having the formula [R.sup.1 R.sup.2 R.sup.3 XCH.sub.2 C.sub.6 H.sub.5 ]+Y-, wherein X is a nitrogen or phosphorus atom;
- R.sup.1, R.sup.2 and R.sup.3 are each independently a C.sub.1-3 -alkyl group or a phenyl group;
- and Y- is the anion of an inorganic or organic acid, the molar ratio of the ketone to formaldehyde being 0.9:1 to 1.3:1 and the activator being present in a concentration of 0.05-5% by weight relative to the ketone.
Dependencies are inferred from the claim text.