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Ionomer interlayer with enhanced adhesion properties
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A technology of ionomer resin and adhesion promoter, which is applied in the direction of layered products, building elements, metal layered products, etc., and can solve the problem of inability to produce sheet melt flow
Pending Publication Date: 2020-05-01
KURARAY AMERICA INC
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However, as disclosed in US20110105681A1, the use of silanes in general with ionomers and in particular with sodium-neutralized ionomers leads to gels and does not produce slab extrusion that can be done in a satisfactory manner. melt flow
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[0068] ionomer
[0069] According to the present invention, the ionomer resin is a sodium-neutralized ethylene·α,β-unsaturated carboxylic acidcopolymer comprising a composition having constituent units derived from ethylene, derived from α,β-unsaturated carboxylic acid unit and optionally other constituent units as described below, wherein at least a part of the constituent units derived from an α,β-unsaturated carboxylic acid is neutralized with sodium ions.
[0070] In the ethylene·α,β-unsaturated carboxylic acid copolymer used as the base polymer, the content ratio of the constituent units derived from α,β-unsaturated carboxylic acid is usually 2% by mass or more or 5% by mass or more (based on total copolymer mass). In addition, the content ratio of constituent units derived from α,β-unsaturated carboxylic acid is usually 30% by mass or less (based on the total copolymer mass).
[0071] Examples of α,β-unsaturated carboxylic acids constituting the ionomer include, but ...
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[0164] The substances used in the examples are as follows.
[0165] The glass used in the examples was standard annealed soda lime glass (available from Guardian Industries, Inc., Galax VA, USA).
[0166] Ionomer 1 (I1) - Partially neutralized ethylene acid binary copolymer ionomer obtained from E.I. du Pont de Nemours & Co. (Wilmington, DE, USA) (21.7% methacrylic acid, Na 26% neutralized, in MI=1.8 at 190°C).
[0167] Silane 1 (S1) – γ-glycidoxypropyltrimethoxysilane ( A-187, available from MomentivePerformance Materials, Inc., Waterford, NY USA)
[0168] Silane 2(S2)-3-glycidoxypropylmethyldiethoxysilane ( 2287, available from Momentive Performance Materials, Inc., Waterford, NY USA).
[0169] Silane 3(S3)-N-(β-aminoethyl)-γ-aminopropylmethyldimethoxysilane ( A-2120, available from Momentive Performance Materials, Inc., Waterford, NY USA).
[0171] For examples containing silane, the following method was used:
[0172] Weigh 1...
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Abstract
Provided is a sodium-neutralized ethylene acid copolymerionomer composition containing a specified silane additive in a specified amount and having enhanced adhesion properties to glass, a masterbatch composition suitable for producing such ionomer composition, an interlayer made from such ionomer composition, and a glass laminate comprising such interlayer.
Description
technical field [0001] The present invention relates to interlayers based on ethylene acid copolymer ionomer compositions having enhanced adhesion properties to glass and glass laminates comprising such interlayers. [0002] Background of the invention [0003] Laminated glass is usually made by laminating two sheets of glass on top of a plastic interlayer. A particular advantage of laminated glass over solid glass sheets is impact and shatter resistance due to the adhesion of the glass to the laminated sheets. [0004] Optimal adhesion of the interlayer to the glass is a balance in safety glass laminates. Adhesion that is too strong reduces the ability of the laminate to absorb and dissipate energy during an impact event, while adhesion that is too weak can cause optical defects (during lamination and subsequently) and can also adversely affect the interlayer's ability to retain the glass upon impact Fragmentation capabilities. [0005] Many different materials are used a...
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