초록 ▼

Safety glass is made by laminating to a ply of glass a polyurethane film incorporating a photoinitiator. The exposed surface of the film is irradiated with ultraviolet light which activates the photoinitiator which in turn initiates crosslinking of the polymer. The polymer film retains its desirable

Safety glass is made by laminating to a ply of glass a polyurethane film incorporating a photoinitiator. The exposed surface of the film is irradiated with ultraviolet light which activates the photoinitiator which in turn initiates crosslinking of the polymer. The polymer film retains its desirable mechanical and optical properties while the crosslinked surface has improved solvent-abrasion resistant.

대표청구항 ▼

A method for making a safety glass laminate comprising the steps of: a. preparing a transparent film of a thermoplastic urethane polymer, essentially free of ethylenic unsaturation, which comprises a photoinitiator in an amount effective to initiate cross-linking of said film; b. laminating said fil

A method for making a safety glass laminate comprising the steps of: a. preparing a transparent film of a thermoplastic urethane polymer, essentially free of ethylenic unsaturation, which comprises a photoinitiator in an amount effective to initiate cross-linking of said film; b. laminating said film to a transparent ply of a material selected from the group consisting of glass and rigid transparent plastics; and c. irradiating the exposed surface of the film with actinic radiation to effect crosslinking of the exposed surface thereby improving its resistance to abrasion in the presence of organic solvents. A transparent polymer film for use as an innerlayer in a bilayer safety glass laminate which consisting essentially of a thermoplastic urethane polymer, essentially free of ethylenic unsaturation, and an effective amount of photoinitiator which upon actinic radiation is capable of initiating crosslinking of said film especially at an exposed surface thereof. A safety glass laminate comprising: a. a first ply of a material selected from the group consisting of glass and rigid transparent plastics; and b. a transparent second ply, bonded to said first ply, of a thermoplastic urethane polymer essentially free of ethylenic unsaturation and an effective amount of photoinitiator wherein the exposed surface of said thermoplastic polymer is crosslinked by actinic radiation.