公开(公告)号：US3631225A

公开(公告)日：1971-12-28

申请号：US3631225D

申请日：1970-04-28

Applicant: UNION CARBIDE CORP

Inventor： TENNEY LINWOOD P ,  LUNDBERG ROBERT D

IPC: C08F8/28 ,  C08F29/50

CPC classification number: C08F8/28 ,  C08F2800/20 ,  C08J5/18 ,  C08F8/48 ,  C08F8/12 ,  C08F118/08

Abstract: THE PREPARATION OF POLYVINYL ACETALS HAVING A VINYL ESTER CONTENT OF ABOUT 12 TO 25% AND A POLYVINYL ALCOHOL CONTENT OF ABOUT 7 TO 10% WAS ACHIEVED IN NON-AQUEOUS DISPERSIONS BY THE ADDITION OF A SWELLING AGENT. THE SWELLING AGENT IS PREFERABLY AN ALKYLENE GLYCOL ALKYL ETHER, SUCH AS 1,2-DIMETHOXYETHANE ALTHOUGH DIETHYLENE GLYCOL ALKYL ETHERS, DIOXANE, TETRAHYDROFURAN, OR TETRAHYDROTHIOPHENE CAN ALSO BE USED.

公开(公告)号：CA946095A

公开(公告)日：1974-04-23

申请号：CA109192

申请日：1971-03-31

Applicant: UNION CARBIDE CORP

Inventor： TENNEY LINWOOD P ,  LUNDBERG ROBERT D

IPC: C08F8/28