Multilayer assembly comprising silane-grafted polyolefin

Abstract

The present invention relates to a silane-grafted polyolefin, to a multilayer composition comprising said polyolefin and to an article comprising said composition.

1 . A cross-linkable polymer (SPO) comprising hydrolysable silane groups that is obtainable from reaction of:
 an olefin silane (OS) comprising hydrolysable silane groups of formula R 1 R 2 R 3 SiY, wherein Y denotes a hydrocarbon radical comprising at least one vinyl functional group, R 1  is a hydrolysable group and R 2  and R 3  are, independently from each other, a C 1 -C 8  alkyl group or are an hydrolysable group as R 2   1 , and   a blend (CB) of at least two copolymer (c1) and (c2) of ethylene and a C 6 -C 10  olefin, wherein the melt flow rate (MFR) of (c1) is lower than 8 g/10 min and the MFR of (c2) is higher than 10 g/10 min, as measured at 190° C. and 2.16 kg.   
     
     
         2 . The cross-linkable polyolefin of  claim 1 , wherein (OS) is a vinyl silane and/or R 1  is chosen from radicals of the alkoxy, acyloxy, oxime, epoxy and amine type, more preferably R 1  is an alkoxy radical containing from 1 to 6 carbon atoms. 
     
     
         3 . The cross-linkable polyolefin of  claim 1 , wherein the weight ratio of (c1):(c2) in (CB) is from 80:20 to 20:80. 
     
     
         4 . A multilayer composition comprising:
 (a) at least one layer of glass, of a metal or of a polymeric material (PM), and   (b) a least one polymeric layer comprising a cross-linked polyolefin (XPO) obtainable by hydrolysis and condensation of a cross-linkable polyolefin comprising hydrolysable silane groups [cross-linkable polymer (SPO)] according to  claim 1 , wherein b) adheres directly to at least a portion of (a) and (PM) is different from (XPO).   
     
     
         5 . The multilayer composition according to  claim 4 , wherein (XPO) is obtainable via hydrolysis and condensation of the cross-linkable polyolefin (SPO) comprising from 0.1% to 3% in weight based on the total weight of (SPO) of hydrolysable sylane groups. 
     
     
         6 . The multilayer composition according to  claim 4 , wherein (XPO) has a degree of cross-linking of at least 40% by weight. 
     
     
         7 . The multilayer composition according to  claim 4 , wherein (XPO) has a degree of cross-linking of at most 95% by weight. 
     
     
         8 . The multilayer composition according to  claim 4 , wherein (PM) is selected from the group consisting of polycarbonates, acrylic polymers, polyacrylates, cyclic polyolefins, metallocene-catalyzed polystyrene, polyethylene terephthalate (PET), polyethylene terephthalate bioriented (BOPET), polyethylene naphthalate, fluoropolymers, and laminates, mixtures or alloys of two or more thereof. 
     
     
         9 . The multilayer material according to  claim 4 , wherein layer (a) comprises or consists of glass. 
     
     
         10 . A process of the preparation of the multilayer composition according to  claim 4 , comprising the steps of:
 i. providing the layer (a);   ii. applying on at least a portion of the (a) layer of step i. a composition comprising the cross-linkable polymer comprising hydrolysable silane groups (SPO), and optionally suitable additives;   iii. cross-linking (SPO) to obtain a multilayer composition wherein the cross-linked polyolefin (XPO) adheres directly to at least a portion of (a).   
     
     
         11 . An article comprising the multilayer composition according to  claim 4 . 
     
     
         12 . The article according to  claim 11  in the form of a photovoltaic cell or of a safety glass. 
     
     
         13 . The cross-linkable polyolefin of  claim 2 , wherein the weight ratio of (c1):(c2) in (CB) is from 80:20 to 20:80. 
     
     
         14 . A multilayer composition comprising:
 (a) at least one layer of glass, of a metal or of a polymeric material (PM), and   (b) a least one polymeric layer comprising a cross-linked polyolefin (XPO) obtainable by hydrolysis and condensation of a cross-linkable polyolefin comprising hydrolysable silane groups [cross-linkable polymer (SPO)] according to  claim 2 , wherein b) adheres directly to at least a portion of (a) and (PM) is different from (XPO).   
     
     
         15 . A multilayer composition comprising:
 (a) at least one layer of glass, of a metal or of a polymeric material (PM), and   (b) a least one polymeric layer comprising a cross-linked polyolefin (XPO) obtainable by hydrolysis and condensation of a cross-linkable polyolefin comprising hydrolysable silane groups [cross-linkable polymer (SPO)] according to  claim 3 , wherein b) adheres directly to at least a portion of (a) and (PM) is different from (XPO).   
     
     
         16 . The multilayer composition according to  claim 5 , wherein (XPO) has a degree of cross-linking of at least 40% by weight. 
     
     
         17 . The multilayer composition according to  claim 6 , wherein (XPO) has a degree of cross-linking of at most 95% by weight. 
     
     
         18 . The multilayer composition according to  claim 5 , wherein (PM) is selected from the group consisting of polycarbonates, acrylic polymers, polyacrylates, cyclic polyolefins, metallocene-catalyzed polystyrene, polyethylene terephthalate (PET), polyethylene terephthalate bioriented (BOPET), polyethylene naphthalate, fluoropolymers, and laminates, mixtures or alloys of two or more thereof. 
     
     
         19 . The multilayer composition according to  claim 6 , wherein (PM) is selected from the group consisting of polycarbonates, acrylic polymers, polyacrylates, cyclic polyolefins, metallocene-catalyzed polystyrene, polyethylene terephthalate (PET), polyethylene terephthalate bioriented (BOPET), polyethylene naphthalate, fluoropolymers, and laminates, mixtures or alloys of two or more thereof. 
     
     
         20 . The multilayer composition according to  claim 7 , wherein (PM) is selected from the group consisting of polycarbonates, acrylic polymers, polyacrylates, cyclic polyolefins, metallocene-catalyzed polystyrene, polyethylene terephthalate (PET), polyethylene terephthalate bioriented (BOPET), polyethylene naphthalate, fluoropolymers, and laminates, mixtures or alloys of two or more thereof.