Laminated glass

Patent metadata

Field	Value
Publication number	US-10889091-B2
Application number	US-201615567079-A
Country	US
Kind code	B2
Filing date	Apr 14, 2016
Priority date	Apr 22, 2015
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

The present invention is a laminated glass which is prepared by inserting a resin intermediate film between glass plates and adhering the glass plates to integrate them, having a bending deflection at 90° C. is 7.3 N/mm 2 or higher, a weight per unit area is 7.5 kg/m 2 or less,
wherein the resin intermediate film contains a modified hydrogenated block copolymer [E] obtained by introducing an alkoxysilyl group into a hydrogenated block copolymer [D], storage elastic moduli in the dynamic viscoelastic properties of the resin intermediate film are 5×10 8 Pa or lower at a temperature of −20° C. and 2×10 7 Pa or higher at a temperature of 90° C., and the hydrogenated block copolymer [D] is obtained by hydrogenating 90% or more of carbon-carbon unsaturated bonds on a main chain and side chains and carbon-carbon unsaturated bonds on an aromatic ring in a specific block copolymer [C].

First claim

The invention claimed is:

1. A laminated glass which is prepared by inserting a resin intermediate film between glass plates and adhering the glass plates to integrate them,
wherein the laminated glass has a bending deflection at 90° C. of 7.3 N/mm 2 or higher and a weight per unit area of 7.5 kg/m 2 or less,
wherein the bending deflection is measured by bonding two glass plates each having a length of 100 mm, a width of 20 mm and a thickness of 0.5 mm to 1.5 mm through the resin intermediate film to form a test piece, subjecting the test piece to a 4-point bending test in accordance with JIS R1602 method, and calculating the bending deflection by equation (1):
Bending deflection=(27/(5× L 3 ))× t 3 E   (1)

wherein L is a distance between supporting rolls of the 4-point bending test in mm, t is a thickness of the test piece in mm, and E is an elastic modulus of the test piece measured by the 4-point bending test in MPa;
wherein the resin intermediate film:
contains a mixture of:
a modified hydrogenated block copolymer [E] obtained by introducing an alkoxysilyl group into a hydrogenated block copolymer [D], and
a hydrogenated block copolymer [D′] having a higher storage elastic modulus at a temperature of 90° C. than that of the hydrogenated block copolymer [D]; or

is a multilayer comprising:
a first layer including the modified hydrogenated block copolymer [E], and
a second layer including the hydrogenated block copolymer [D] and/or the hydrogenated block copolymer [D′], wherein the first layer and the second layer are alternately laminated,

wherein storage elastic moduli measured via dynamic viscoelasticity of the resin intermediate film are 5×10 8 Pa or lower at a temperature of −20° C. and 3×10 7 Pa or higher at a temperature of 90° C.,
wherein the hydrogenated block copolymer [D] is obtained by hydrogenating 90% or more of carbon-carbon unsaturated bonds on a main chain and side chains and carbon-carbon unsaturated bonds on an aromatic ring in a block copolymer [C] which contains at least two polymer blocks [A] containing 95 wt % or more of a structural unit derived from an aromatic vinyl compound and at least one polymer block [B] containing 80 wt % or more of a structural unit derived from an acyclic conjugated diene compound, wherein a ratio (wA:wB) of a weight fraction (wA) of the polymer block [A] to a weight fraction (wB) of the polymer block [B] is 40:60 to 60:40,
wherein the hydrogenated block copolymer [D′] is obtained by hydrogenating 90% or more of carbon-carbon unsaturated bonds on a main chain and side chains and carbon-carbon unsaturated bonds on an aromatic ring in a block copolymer [C′] which contains at least two polymer blocks [A′] containing 95 wt % or more of a structural unit derived from an aromatic vinyl compound and at least one polymer block [B′] containing 80 wt % or more of a structural unit derived from an acyclic conjugated diene compound, wherein a ratio (wA′:wB′) of a weight fraction (wA′) of the polymer block [A′] to a weight fraction (wB′) of the polymer block [B′] is 50:50 to 70:30,
wherein the modified hydrogenated block copolymer [E] includes the alkoxysilyl group introduced into the hydrogenated block copolymer [D] in an amount of 0.1 to 10 parts by weight of the alkoxysilyl group based on 100 parts of the hydrogenated block copolymer [D],
wherein a content of the modified hydrogenated block copolymer [E] in the resin intermediate film is 26 wt % or more, and
wherein a ratio (t R /t) of a thickness of the resin intermediate film (t R ) in the laminated glass to a total thickness of the laminated glass (t) 20 to 80%.

2. The laminated glass according to claim 1 , wherein the resin intermediate film contains the mixture of the modified hydrogenated block copolymer [E] and the hydrogenated block copolymer [D′].

3. The laminated glass according to claim 1 , wherein the resin intermediate film is the multilayer comprising the first layer including the modified hydrogenated block copolymer [E], and the second layer including the hydrogenated block copolymer [D] and/or the hydrogenated block copolymer [D′], wherein the first layer and the second layer are alternately laminated.

Assignees

• Zeon Corp

Inventors

• Kanda Hideyuki
• Ishiguro Atsushi
• Kohara Teiji

Classifications

• B32B17/1055 Primary

  characterized by the resin layer, i.e. interlayer · CPC title

• B32B27/08 Primary

  of synthetic resin · CPC title

• C08F287/00

  Macromolecular compounds obtained by polymerising monomers on to block polymers · CPC title

• B32B2571/00

  Protective equipment · CPC title

• B32B2605/006

  Transparent parts other than made from inorganic glass, e.g. polycarbonate glazings · CPC title