초록

A novel polyurethane can be used to form asymmetrical laminates with glass and plastics such as polycarbonate at temperatures below 150°F. The polyurethane is a reaction product of a diisocyanate, a high molecular weight polyether glycol or polyester glycol, and at least two different diols.

대표청구항 ▼

A window glass article capable of transmitting at least 8% of visible light comprising (i) a layer of polyurethane, sandwiched between (ii) a layer of a first material and (iii) a layer of a second material, where the first and second materials can be the same or different, and are selected from the

A window glass article capable of transmitting at least 8% of visible light comprising (i) a layer of polyurethane, sandwiched between (ii) a layer of a first material and (iii) a layer of a second material, where the first and second materials can be the same or different, and are selected from the group consisting of light transmitting glass, plastic, and ceramic; the polyurethane having been cured prior to being sandwiched between the first and second materials by a curing reaction which is carried out essentially in absence of aromatic amines the polyurethane having a Shore A hardness of at least about 60, and being capable of laminating to the other two layers at a lamination temperature below 150°F. and a pressure below 200 psig so that the article does not delaminate at room temperature at 2 pli. The window glass of claim 1 wherein the coefficient of thermal expansion of the first material is at least about five times the coefficient of thermal expansion of the second material within the temperature range of from 180°F. to 200°F.