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Priority to JP22995083ApriorityCriticalpatent/JPS60123514A/ja
Publication of JPS60123514ApublicationCriticalpatent/JPS60123514A/ja
Publication of JPH0374246B2publicationCriticalpatent/JPH0374246B2/ja
Process of preparing powdery copolymers of vinyl ethers and maleic anhydride using polymeric anti-clumping additives derived from vinyl alkoxyalkyl ethers