Preparation of ketone containing photodegradable polymers
AssigneeThe Dow Chemical Company
InventorsJames J. O'Brien, Kevin D. Sikkema, Duane B. Priddy
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Abstract
A process for preparing polymers comprising pendant ketone functional moieties, the steps of the process comprising exposing a mixture comprising an ethylenically unsaturated addition polymerizable monomer and a .beta.-substituted ketone compound corresponding to the formula: XCH.sub.2 --CHR'--C(O)R where X is a suitable leaving group, R' is hydrogen or R; and R is alkyl or aryl of up to 12 carbons to vinyl ketone monomer formation conditions to prepare the corresponding vinyl ketone monomer from the .beta.-substituted ketone compound and subsequently exposing the mixture to addition polymerization conditions to prepare the resulting polymer.
Claims17
A process for preparing polymers comprising pendant ketone functional moieties, the steps of the process comprising exposing a mixture comprising an ethylenically unsaturated addition polymerizable monomer and a .beta.-substituted ketone compound corresponding to the formula:
- XCH.sub.2 --CHR'--C(O)R
- wherein
- X is a suitable leaving group,
- R' is hydrogen or R;
- and
- R is alkyl or aryl of up to 12 carbons
- to vinyl ketone monomer formation conditions to prepare the corresponding vinyl ketone monomer from the .beta.-substituted ketone compound and exposing the resultant mixture to addition polymerization conditions to prepare the polymer.
A process for preparing polymers comprising pendant ketone functional moieties, the steps of the process comprising
- a) exposing a .beta.-substituted ketone compound corresponding to the formula:
- XCH.sub.2 --CHR'--C(O)R
- wherein
- X is a suitable leaving group,
- R' is hydrogen or R;
- and
- R is alkyl or aryl of up to 12 carbons
- to vinyl ketone monomer formation conditions in a polymerization reactor or in processing equipment in operative communication with a polymerization reactor to prepare a vinyl ketone monomer;
- b) forming a mixture of the vinyl ketone monomer with an addition polymerizable monomer in the polymerization reactor;
- and
- c) exposing the mixture to polymerization conditions to prepare the resulting polymer.
Dependencies are inferred from the claim text.