公开(公告)号：US3849386A

公开(公告)日：1974-11-19

申请号：US41267273

申请日：1973-11-05

Applicant: ESB INC

Inventor： BERNSTEIN P ,  VARKER A

IPC: C08L81/04 ,  C08G23/00

CPC classification number: C08L81/04

Abstract: 1. MOISTURE ACTIVATABLE POLYSULFIDE SEALANTS COMPRISING A CURABLE, LIQUID POLYSULFIDE POLYMER; A DORMANT CURING AGENT; AN ALKALINE EATH HYDROXIDE AND A HYDROLIZABLE AMINE SALT OF AN ACID WHEREIN: (A) THE POLYSULFIDE POLYMER IS SELECTED FROM POLYSULFIDE POLYMERS HAVING THE RECURRING UNIT (RSS9, WHEREIN R IS A DIVALENT ORGANIC RADICAL AND SS IS A DISULFIDE LINKAGE, AND MERCAPTO TERMINATED POLYSULFIDE POLYMERS HAVING AN AVERAGE MOLECULAR WEIGHT OF FROM ABOUT 2,000 TO ABOUT 10,000; (B) THE DORMANT CURING AGENT IS INCAPABLE ALONE OF CURING THE POLYSULFIDE POLYMER AT ROOM TEMPERATURE BUT CAN EFFECT SUCH BY EXPOSURE TO FREE AMINE; (C) THE HYDROLOZABLE AMINE SALT IS A SALT OF ORGANIC OR INORGANIC ACID, CAPABLE OF REACTING WITH MOISTURE IN THE AIR TO RELEASE SUFFICIENT FREE AMINE TO INITIATE THE ACTION OF THE DOMANT CURING AGENT; (D) THE ALKALINE ERTH HYDROXIDE IS A WEAKLY BAISC HYDROXIDE CAPABLE OF FORMING A SALT WITH THE ACID RELEASED FROM THE HYDROLIZABLE AMINE SALT OF (C) WHEN SAID AMINE SALT RELESES FREE AMINE UPON REACTION WITH MOISTURE IN THE AIR; AND (E) THE AMOUNT OF AMINE SALT PRESENT IS FORM ABOUT 1 TO ABOUT 10 WEIGHT PERCENT BASED ON THE TOTAL WEIGHT OF THE SEALANT; THE AMOUNT OF ALKALINE EARTH HYDROXIDE PRESENT IS AT LEAST STOICHIOMETRICALLY EQUAL TO THE AMOUNT OF AMINE SALT PRESENT; AND THE REMAINDER OF THE SEALANT COMPRISES THE LIQUID POLYSULFIDE POLYMER AND DORMANT CURING AGENT, FROM ABOUT 5 TO ABOUT 25 PARTS OF THE CURING AGENT BEING PRESENT FOR EACH 100 PARTS OF THE POLYSULFIDE POLYMER.