Patent GB-1011125-A (GB)
Title: Compositions and processes for causing polyolefins to adhere to surfaces
IPC: C08L83/04
Filed: 1964-04-07
Abstract: An adhesive for causing a polyolefine to adhere to a substrate comprises a composition in liquid form consisting essentially of a mixture of (1) a silane having the general formula <FORM:1011125/C4-C5/1> wherein R is a divalent hydrocarbon radical free from aliphatic unsaturation and containing at least 3 carbon atoms, Z is a hydrogen atom or a substituted monovalent hydrocarbon radical containing at least one H2N group and being free from aliphatic unsaturation, R1 is an alkyl radical containing one to four carbon atoms, or a -CH2CH2OH, -CH2CH2OCH3 or -CH2CH2OCH2CH3 radical, R11 is a monovalent hydrocarbon radical free from aliphatic unsaturation or a fluorinated monovalent hydrocarbon radical free from aliphatic unsaturation in which each of the fluorine atoms is attached to a carbon atom which is at least three carbon atoms removed from the silicon atom, a is 0, 1 or 2, and the Z2N group is attached to a carbon atom which is at least three carbon atoms removed from the silicon atom, and (2) a monocarboxylic acid and/or a silane having the general formula R111Si(OR1)3 wherein R111 is an alkyl radical containing 1 to 18 carbon atoms or a phenyl radical and R1 is as defined above, drying the substrate and bonding the polyolefine to the substrate. Numerous examples of suitable silanes are given.ALSO:Amino silanes for use in adhesive compositions have the general formula <FORM:1011125/C3/1> wherein R is a divalent hydrocarbon radical free from aliphatic unsaturation and containing at least 3 carbon atoms, Z is a hydrogen atom or a substituted monovalent hydrocarbon radical containing at least one H2N group and being free from aliphatic unsaturation, R1 is an alkyl radical containing one to four carbon atoms, or a -CH2CH2OH, -CH2CH2OCH3 or -CH2CH2OCH2CH3 radical, R11 is a monovalent hydrocarbon radical free from aliphatic unsaturation or a fluorinated monovalent hydrocarbon radical free from aliphatic unsaturation in which each of the fluorine atoms is attached to a carbon atom which is at least three carbon atoms removed from the silicon atom, a is 0, 1 or 2, and the Z2N group is attached to a carbon atom which is at least three carbon atoms removed from the silicon atom.  Many examples are given of specific radicals R1, R11 and Z and of suitable amino silanes including amino-alkylaminosilanes.ALSO:A process for causing a polyolefine to adhere to a substrate comprises applying to the substrate a composition in liquid form consisting essentially of a mixture of (1) a silane having the general formula <FORM:1011125/B1-B2/1> wherein R is a divalent hydrocarbon radical free from aliphatic unsaturation and containing at least 3 carbon atoms, Z is a hydrogen atom or a substituted monovalent hydrocarbon radical containing at least one H2N group and being free from aliphatic unsaturation, R1 is an alkyl radical containing one to four carbon atoms, or a -CH2CH2OH, -CH2CH2OCH3, or -CH2CH2OCH2CH3 radical, R11 is a monovalent hydrocarbon radical free from aliphatic unsaturation or a fluorinated monovalent hydrocarbon radical free from aliphatic unsaturation in which each of the fluorine atoms is attached to a carbon atom which is at least three carbon atoms removed from the silicon atom, a is 0, 1 or 2, and the Z2N group is attached to a carbon atom which is at least three carbon atoms removed from the silicon atom, and (2) a monocarboxylic acid and/or a silane having the general formula R111Si(OR1)3 wherein R111 is an alkyl radical containing 1-18 carbon atoms or a phenyl radical and R1 is as defined above, drying the substrate and bonding the polyolefine to the substrate.  Numerous examples of suitable silanes are given. The compositions when liquid may be applied directly to the substrate, and whether solid or liquid they may be applied in solution in organic solvents and/or water.  Application may be by wiping, brushing or spraying.  Suitable substrates include regenerated cellulose sheets, regenerated cellulose sheets coated with a co-polymer of vinyl chloride and vinylidene chloride, ethylene glycol-terephthalate polyester sheets, aluminium foil, glassine paper, silicone treated parchment paper, cotton cloth, glass and ceramic tile; the preferred substrate is regenerated cellulose sheet coated with a copolymer of vinyl chloride and vinylidene chloride. The polyolefine may be polyethylene which is preferred, polystyrene, polypropylene, polyethylene-butylene co-polymers, polyisoprene and butadiene-styrene co-polymers.  The polyolefine may be finally laminated to the substrate by heat and pressure.