Elastomer pmma layered composites having improved properties

Patent metadata

Field	Value
Publication number	US-2016101607-A1
Application number	US-201414787996-A
Country	US
Kind code	A1
Filing date	Apr 17, 2014
Priority date	Apr 29, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

The invention relates to a plastics laminate in particular for vehicle glazing. The composite is composed of at least three layers, where the two exterior layers are composed of a transparent polymethyl (meth)acrylate (PMMA) and the internal layer is composed of a thermoplastic polyurethane (TPU). The plastics laminate passes the ECE R43 falling-ball test and has better acoustic properties than prior-art plastics composites of the same size.

First claim

1 . A plastic laminate made of comprising:
at least two poly(meth)acrylate layers (1) and (2), and a layer comprising a thermoplastic polyurethane (3) and located between the at least two poly(meth)acrylate layers (1) and (2), wherein the thermoplastic polyurethane comprises from 30 to 60% by weight of hard segments and from 40 to 70% by weight of soft segments.

2 . The plastic laminate of claim 1 , wherein the thermoplastic polyurethane comprises from 30 to 45% by weight of hard segments and from 55 to 70% by weight of soft segments.

3 . The plastic laminate pf claim 1 , wherein the soft segments of the thermoplastic polyurethane comprise, in reacted form, an aliphatic polyesterdiol and diisocyanate.

4 . The plastic laminate of claim 1 , wherein the hard segments comprise, in reacted form, a diisocyanate and an alkyl diol that has at most 10 carbon atoms.

5 . The plastic laminate of claim 3 , wherein the diisocyanate comprises hexamethylene diisocyanate (HDI) or dicyclohexylmethane diisocyanate (H12MDI).

6 . The plastic laminate of claim 1 , wherein the poly(meth)acrylate layers (1) and (2) comprise, in reacted form, a monomer mixture comprising at least 90% by weight of MMA.

7 . The plastic laminate of claim 1 , wherein one or both poly(meth)acrylate layers comprise an IR-reflective pigment and/or a UV absorber and/or a UV stabilizer.

8 . The plastic laminate of claim 1 , wherein at least one of the two poly(meth)acrylate layers further comprises an impact modifier.

9 . A process for producing the plastic laminate of claim 1 , comprising:
mutually superposing the layers (1), (3) and (2), heating the superposed layers to a temperature of from 80 to 140° C. and, pressing the superposed layers at a force of from 10 to 100 kN over a period of from 20 to 60 s.

10 . A glazing comprising the plastic laminate of claim 1 .

11 . The plastic laminate of claim 4 , wherein the diisocyanate comprises hexamethylene diisocyanate (HDI) or dicyclohexylmethane diisocyanate (H12MDI).

Assignees

• Hoess Werner
• Schmidt Arne
• Manis Antonios
• Evonik Roehm Gmbh
• Basf Se

Inventors

• Hoess Werner
• Schmidt Arne
• Manis Antonios

Classifications

• B32B27/308

  comprising acrylic (co)polymers · CPC title

• B32B2309/12

  Pressure · CPC title

• B32B2419/00

  Buildings or parts thereof · CPC title

• B32B2307/412

  Transparent · CPC title

• B32B2605/006

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