Patent ID: 7968186

Claim:
An acoustic solar control laminate consisting of: (a) a first rigid sheet; (b) a first polymeric sheet; (c) a polymeric film, which is coated on at least one side with an infrared energy reflective layer; (d) a second polymeric sheet; and (e) a second rigid sheet; wherein the first rigid sheet is adhered to the first polymeric sheet; the first polymeric sheet is adhered to the polymeric film; the polymeric film is adhered to the second polymeric sheet; and the second polymeric sheet is adhered to the second rigid sheet; and further wherein the first polymeric sheet comprises an acoustic poly(vinyl acetal) composition having a glass transition temperature of 23° C. or less, said acoustic poly(vinyl acetal) composition comprising a plasticizer and a poly(vinyl acetal), said poly(vinyl acetal) being produced by acetalizing a poly(vinyl alcohol) with one or more aldehydes containing 4 to 6 carbon atoms, said poly(vinyl acetal) having an acetalization degree of at least about 50 mole %, and said poly(vinyl acetal) having a saponification degree of at least 95 mole %, based on the total number of moles of vinyl groups in the poly(vinyl acetal); and wherein the first and the second rigid sheets are each formed of a material having a modulus of at least about 100,000 psi (690 MPa).