Process for preparing nine-member ring phosphonates
AssigneeRohm and Haas Company
InventorsJames S. Clovis, Francis R. Sullivan
Life of this patent
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Abstract
A nine-membered ring phosphonate compound having the formula ##STR1## wherein R.sup.1 is hydrogen or methyl, R.sup.2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy or phenoxy and R.sup.3 and R.sup.4 are the same or different and are lower alkyl of up to eight carbon atoms, preferably methyl, is formed by the reaction of acrylic or methacrylic acid with a compound of the general formula ##STR2## wherein R.sup.2, R.sup.3 and R.sup.4 are as above. The ring phosphonates are useful for forming flame-retardant compositions from mixtures comprising the phosphonate and methyl methacrylate.
Claims3
A process for preparing a nine-membered ring phosphonate having the general formula:
- ##STR6## wherein R.sup.1 is selected from the group consisting of hydrogen and methyl, R.sup.2 is phenyl or substituted phenyl wherein the substitution is one or more of halogen, nitro, lower alkyl, cyclohexyl, alkoxy, naphthoxy or phenoxy and R.sup.3 and R.sup.4 are the same or different and are lower alkyl of up to eight carbon atoms, comprising reacting a compound selected from the group consisting of acrylic acid of methacrylic acid with a compound having the general formula:
- ##STR7## wherein R.sup.2, R.sup.3 and R.sup.4 are as defined hereinabove.
Dependencies are inferred from the claim text.