Unlock instant, AI-driven research and patent intelligence for your innovation.

Poly(vinyl acetal) resin compositions, layers, and interlayers having enhanced optical properties

a technology of poly(vinyl acetal) resin and optical properties, applied in the field of polymer resins, can solve the problems of lack of other desirable properties, such as impact resistance or strength, quiet internal spaces, and lack of properties such as acoustic performance, and achieve the effects of improving clarity, and reducing haze and mottl

Inactive Publication Date: 2016-06-09
SOLUTIA INC
View PDF9 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to an interlayer that can be used in various applications such as optical devices and coatings. The interlayer comprises a first resin layer, a second resin layer, and a third plasticized polyvinyl resin layer. The first and second resin layers each have a refractive index of at least 1.460 and a difference in refractive index with the third layer of not more than 0.102. The third plasticized resin layer has a refractive index of at least 1.460 and is sandwiched between the first and second layers. The technical effect of the invention is to provide an interlayer that has high refractive index and low difference in refractive index between layers.

Problems solved by technology

Additionally, safety glass with desirable acoustic properties has also been produced, which results in quieter internal spaces.
Often, polymers that exhibit one set of desirable properties, such as acoustic performance, lack other desirable properties, such as impact resistance or strength.
However, because such resin layers can be difficult to easily process and / or transport, the skin layers of such multilayered interlayers are often stiffer, with higher glass transition temperatures, which imparts enhanced processability, strength, and impact resistance to the interlayer.
However, use of various layers having different properties can also produce optical defects within the interlayer.
For example, one defect common to these types of multilayer interlayers is mottle.
Mottle is an objectionable form of optical distortion or visual defect appearing as uneven spots or texture, usually in the final structure.
In such mixtures, light passing through the blend is scattered as it encounters regions of different polymer materials, and the result is a hazy, visually unclear appearance.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Poly(vinyl acetal) resin compositions, layers, and interlayers having enhanced optical properties

Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of High Refractive Index Poly(Vinyl Acetal) Resins

[0124]Several comparative poly(vinyl acetal) resins, referred to as Comparative Resins CR-1 through CR-12 in Table 2 below, were prepared by acetalizing polyvinyl alcohol with one or more aldehydes including n-butyraldehyde (nBuCHO; RI=1.377), iso-butyraldehyde (iBuCHO; RI=1.374), and 2-ethylhexyl aldehyde (2EHCHO; RI=1.414). The composition of the resulting resins were measured using either the ASTM D1396 or FT-IR / SEC method described in detail previously. The refractive index of several of the resins was also measured according to the methods described previously, and the results are provided in Table 2, below.

TABLE 2Properties of Several Comparative Poly(vinyl acetal) ResinsResidualResidualResidualResinResidualResidualPolyvinylPolyvinylPolyvinylRefractiveHydroxylAcetatenBuCHOiBuCHO2EHCHOIndexResin(wt %)(wt %)(wt %)(wt %)(wt %)(nD25)CR-121178——1.491CR-219180——1.490CR-319146—341.489CR-416183——1.488CR-515139—451.487CR-613...

example 2

Preparation of High Refractive Index Resin Interlayers

[0127]Several Comparative and Disclosed Interlayers were formed by mixing and melt blending several of the Comparative Resins listed in Table 2 and several of the Disclosed Resins listed in Table 3 above, with varying amounts of the plasticizer triethylene glycol bis(2-ethylhexanoate) (3GEH). The composition, refractive index, and glass transition temperature of each of the resulting interlayers, referred to as Comparative Interlayers CL-1 through CL-14 and Disclosed Interlayers DL-1 through DL-26, were measured as described previously, and the results are respectively summarized in Tables 4 and 5, below.

TABLE 4Properties of Several Comparative InterlayersRefractivePlasticizerIndexTgInterlayerResin(phr)(nD25)(° C.)CL-1CR-1341.47836CL-2CR-2381.47730CL-3CR-3381.47528CL-4CR-4501.47217CL-5CR-4301.47730CL-6CR-5751.4686CL-7CR-6751.4672CL-8CR-7751.464−4CL-9CR-8751.466−3CL-10CR-9751.465−3CL-11CR-10751.466−2CL-12CR-10501.47 12CL-13CR-1175...

example 3

Preparation of Interlayers Using High Refractive Index Resins

[0129]Several of the Comparative and Disclosed Interlayers formed in Example 2 and respectively summarized in Tables 4 and 5, above, were used to create several Comparative and Disclosed Multilayer Interlayers. Each multilayer interlayer included a pair of outer “skin” layers, having a total thickness of 28 mils, sandwiching an inner “core” layer having a thickness of 5 mils, usually formed of a resin having a lower residual hydroxyl content. The composition and several properties of the interlayers including refractive index, glass transition temperature, mottle, and loss factor, were measured as described above, and the results for the Comparative Multilayer Interlayers (CI-1 to CI-16) and Disclosed Multilayer Interlayers (DI-1 to DI-29) are summarized in Tables 6 and 7, below.

TABLE 6Properties of Several Comparative Multilayer InterlayersΔRefractiveRefractiveIndexIndex ofLossResin LayerTg (° C.)Refractive Index(Skin −In...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
refractive indexaaaaaaaaaa
refractive indexaaaaaaaaaa
refractive indexaaaaaaaaaa
Login to View More

Abstract

Resin compositions, layers, and interlayers comprising two or more thermoplastic polymers and at least one RI balancing agent for adjusting the refractive index of at least one of the resins or layers is provided. Such compositions, layers, and interlayers exhibit enhanced optical properties while retaining other properties, such as impact resistance and acoustic performance.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims priority to U.S. Provisional Application Ser. No. 62 / 088,962 filed Dec. 8, 2014, the disclosure of which is incorporated herein by reference in its entirety.BACKGROUND[0002]1. Field of the Invention[0003]This disclosure relates to polymer resins and, in particular, to polymer resins suitable for use in polymer interlayers, including those utilized in multiple layer panels.[0004]2. Description of Related Art[0005]Poly(vinyl butyral) (PVB) is often used in the manufacture of polymer sheets that can be used as interlayers in multiple layer panels, including, for example, light-transmitting laminates such as safety glass or polymeric laminates. PVB is also used in photovoltaic solar panels to encapsulate the panels which are used to generate and supply electricity for commercial and residential applications.[0006]Safety glass generally refers to a transparent laminate that includes at least one polymer sheet, or interla...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): B32B27/08B32B27/30
CPCB32B27/08B32B2307/418B32B2250/246B32B27/30B32B27/22B32B27/306B32B27/36B32B2270/00B32B2307/412B32B2307/558B32B2307/732B32B2419/00B32B2457/12B32B2551/00B32B2571/02B32B2605/006B32B2607/02B32B17/10761B32B2250/03B32B2307/56C08L1/00B32B17/10605
Inventor LU, JUNCHEN, WENJIESCHILLING, III, CURTISD'ERRICO, JOHN JOSEPHCUI, WEIHONG
Owner SOLUTIA INC