Intrusion resistant glass laminates

a technology of glass laminates and glass fibers, applied in the direction of film/foil adhesives, synthetic resin layered products, transportation and packaging, etc., can solve the problem of not disclosing the modulus or the construction of laminates, and achieve the effect of enhancing stiffness

Inactive Publication Date: 2005-08-04
SOLUTIA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] This invention provides a composite laminate interlayer for use in manufacturing intrusion resistant glass laminates having a higher laminate stiffness. Such laminates comprise an interlayer having at least one layer of high stiffness, plasticized PVB. In one aspect of the invention high stiffness in plasticized, PVB is advantageously provided by reducing the level of plasticizer as indicated by a rise in glass transition temperature (Tg) of the plasticized PVB, e.g. about 2 to 3° C. above typical values for a commercial application. For instance, for automotive applications, where plasticized PVB sheet typically has a Tg of about 30-33° C., high stiffness PVB of this invention will have a Tg of at least 35° C. Glass laminates of this invention preferably have a maximum flexural modulus of at least 350 Newtons / centimeter (N / cm).

Problems solved by technology

Cartier et al. do not disclose values of modulus or construction of laminates.

Method used

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Examples

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examples 1-15

[0044] Glass laminates about 45×60 cm (18×24 in) were constructed of the materials indicated in Table 1.

TABLE 1Laminate No.Layer Assembly1glass / PBV2 / glass2glass / PVB3 / glass3glass / PVB4 / glass4glass / PVB1 / PET2 / PVB1 / glass5glass / PVB5 / PVB5 / glass6glass / PVB7 / PET2 / PVB7 / glass7glass / PVB6 / PET2 / PVB6 / glass8glass / PVB7 / PET1 / PVB7 / glass9glass / PVB2 / PET1 / PVB2 / glass10glass / PVB6 / PET1 / PVB6 / glass11glass / PVB5 / PET2 / PVB5 / glass12glass / IONOMER / glass13glass / PVB2 / PET2 / PVB2 / glass14glass / PVB5 / glass15glass / PVB1 / PVB5 / PVB1 / glass

[0045] The laminates were evaluated for impact resistance by striking with a 9.5 kilogram hammer-head at the end of a 1400 mm pendulum arm from a drop height of 700 mm according to British Standard BS AU 209, Part 4a modified in that the glass laminate was mounted in a vertically oriented test frame of the type shown in FIG. 5A; the hammer was set to strike at five points of a diamond pattern measuring 70 mm on a square side (in sequence, the top, left center, center, right center and bottom). ...

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Abstract

Composite laminate interlayers for adhering a glass laminate comprising a sheet of polyethylene terephthalate (PET) between layers of plasticized polyvinyl butyral (PVB) adhesive layers, wherein at least one of the PVB adhesive layers is stiffened, e.g. by reduction in the amount of plasticizer, and has a glass transition temperature greater than 35° C. The PET is preferably 0.075 to 0.25 mm (3-10 mils) thick and can have a functional coating for reducing radiation, e.g. UV or IR or visible light, transmission through the glass laminate. The laminate can also comprise at least one elastomeric layer adapted to reducing sound transmission through the glass laminate. The laminates exhibit enhanced maximum flexural modulus of greater than about 350 Newtons / centimeter.

Description

[0001] This application is a continuation of co-pending U.S. application Ser. No. 09 / 737,234, filed Dec. 14, 2000, which in turn claims priority from U.S. Provisional Application Ser. No. 60 / 170,888 filed Dec. 14, 1999.[0002] Disclosed herein are intrusion resistant glass laminates and composite interlayers comprising enhanced modulus polyvinyl butyral (PVB) adhesive for making glass laminates which are especially useful as intrusion resistant glazing for architectural and automotive applications. BACKGROUND [0003] Automobile and home owners, especially those who have experienced a vehicle break-in or theft or hurricane damage, are increasingly interested in intrusion resistant glazing. Glass has been identified as the weak link in the overall intrusion resistance of vehicles and buildings. For instance, some police reports estimate that broken glass is the entry route for at least 60% of unauthorized entry into passenger vehicles. There is also a belief that a 10 second delay in en...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B17/10B32B27/36C09J7/22C09J7/30
CPCB32B17/10B32B17/10036B32B17/10174B32B17/10761Y10T428/24959Y10T428/266Y10T428/24942B32B17/064C09J7/0239B32B27/36B32B2367/00C09J2459/00C09J2467/006C09J7/22C09J7/30Y10T428/3163Y10T428/31786Y10T428/31942C09J2301/124B32B17/10005
Inventor MORAN, JAMES R.LU, JUNSCHIMMELPENNINGH, JULIA C.
Owner SOLUTIA INC
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