Patent ID: 8197928
Filing Date: 2012-06-12
Classification: B32B,C08K,H01L,Y02E,Y10T

Abstract:
1. An interlayer sheet comprising a poly(vinyl butyral) composition containing about 20 to about 26 wt % of triethylene glycol di-2-ethylhexanoate plasticizer, wherein a) said interlayer sheet has a pummel value equal to or greater than about 1, a thickness of about 20 to about 30 mils, and a compressive shear strength greater than or equal to about 1000 psi, and b) said interlayer sheet, when laminated with float glass sheets having a thickness of about 2.5 or about 3 mm, provides glass laminates which pass the modified EN 356 P2A test in which a 4.1 kg ball falls from a height of 3 m to strike the air side of the float, glass in an “ATAT” laminate and no penetration is observed after testing 10 (ten) laminate replicates; and which optionally further has one or more characteristics selected from the group consisting of a compressive shear strength of about 1000 to about 2500 psi; a pummel value of about 2 to about 7; an E50 value greater than or equal to 300 psi; and an E120 value of about 8 to about 15 N/mm2.