公开(公告)号：US3624190A

公开(公告)日：1971-11-30

申请号：US3624190D

申请日：1967-06-16

Applicant: DOW CORNING

Inventor： CEKADA JOSEPH JR ,  REININK EDWIN E

IPC: C08G77/04 ,  G01S1/02 ,  G01S1/24 ,  G01S19/35 ,  B29D27/04 ,  C08G22/04 ,  C08G22/46

CPC classification number: G01S1/24 ,  B29C33/64 ,  B29K2075/00 ,  B29K2105/04 ,  C08G77/04 ,  G01S1/02 ,  Y10S264/14

Abstract: The deposition of a diorganopolysiloxane in liquid form on the surface of a mold is used in making polyurethane foam articles. The diorganopolysiloxane is a release agent for polyurethane foam when applied on a mold surface which has been treated with a conventional release agent. The steps of the method include depositing a conventional mold release agent on the surface of a mold, applying the diorganopolysiloxane over the conventional mold release agent, placing a polyurethane foam composition in the mold, allowing the foam to rise, curing the polyurethane foam and demolding the polyurethane foam product. the diorganopolysiloxanes have siloxane units of R(CH3)SiO, at least 50 mol percent,

UP TO 40 MOL PERCENT, AND R''(CH3) SiO, up to 10 mol percent, wherein R is an alkyl radical of three to 30 carbon atoms and R'' is methyl, ethyl, phenyl, benzyl and R''''O(C H2 O) (CH2)3-and the diorganopolysiloxane can be end blocked by hydroxyl groups or triorganosiloxy groups.