| 摘要 |
An interlayer comprised of a high flow, low molecular weight thermoplastic resin, and at least one plasticizer is disclosed. The use of a high flow, low molecular weight thermoplastic resin, and a plasticizer creates synergy allowing the flow of the interlayer to be increased without sacrificing other characteristics typically associated with an increased flow (e.g., increased blocking, decreased mechanical strength, and decreased manufacturing capability). In this regard, the high flow, low molecular weight thermoplastic resin provides a flow improvement, resulting in a high flow interlayer. As a result, a thinner interlayer can be utilized in forming multiple layer panels because the resulting thinner interlayer has improved flow properties. |
| 主权项 |
1. A high flow interlayer comprising:
a poly(vinyl butyral) layer comprising a poly(vinyl butyral) resin having a resin molecular weight (Mw) as measured by size exclusion chromatography using low angle laser light scattering of from about 100,000 Daltons to less than about 180,000 Daltons; a second poly(vinyl butyral) layer, and a third poly(vinyl butyral) layer, the second poly(vinyl butyral) layer comprising a poly(vinyl butyral) resin having a resin molecular weight (Mw) as measured by size exclusion chromatography using low angle laser light scattering of from about 100,000 Daltons to less than about 180,000 Daltons and the third poly(vinyl butyral) layer comprising a poly(vinyl butyral) resin, wherein the third poly(vinyl butyral) layer is disposed between the first and second poly(vinyl butyral) layers; and at least one plasticizer selected from esters of a polybasic acid or a polyhydric alcohol, polyadipates, epoxides, phthalates, terephthalates, benzoates, toluates and mellitates; wherein the high flow interlayer has a flow of about 0.235 mm to about 0.335 mm, measured as the DF135, a creep of less than or equal to 1.0 mm, and a surface roughness, Rz, as formed by melt fracture of greater than or equal to about 25 μm. |
