Plastic window, especially for motor vehicles, and process for its manufacture

A glass-free motor vehicle window, which is at least partly transparent, and which meets French standard R43 for motor vehicle windows, which comprises:

• a.) a plastic layer having a thickness of 5 to 10 mm,
• b.) at least one skin layer of a plastic film having a thickness of 10 to 100 μm coated on said plastic layer, and
• c.) a scratch-resistant layer having a thickness of 1 to 10 μm supported by said plastic film,
• wherein said window is prepared by the following process (A) or process (B), wherein process (A) comprises:
• 1.) providing said skin layer b.), either flat or in shaped form,
• 2.) subjecting said skin layer to heat treatment, the skin layer, being supported completely or partly by a mould surface, an auxiliary means for shaping at least part of the skin to the said mould surface being optionally provided so as to relax stresses in the skin, and crosslinking constituent elements of the skin layer;
• and
• 3.) joining the skin to said plastic layer a.) by hot pressing in a form, or by thermoplastic injection moulding or reactive injection moulding of the material of the plastic layer a.), the skin having been positioned in the bottom of the mould in such a way that a scratch-resistant layer c.) is in direct contact with the mould;
• and process (B) comprises:
• 1.) depositing the constituent elements of a scratch-resistant layer on a substantially flat plastic film;
• and
• 2.) shaping said film bearing the elements of the scratch-resistant layer into a shape which is the same as or at least similar to the ultimate shape of the end-product, while at the same time at least partly crosslinking the scratch-resistant layer.

A process for preparing a glass-free automobile window which is at least partly transparent, and which meets French standard R43 for motor vehicle windows, which comprises:

• a.) a plastic layer having a thickness of 5 to 10 mm,
• b.) at least one skin layer of a plastic film having a thickness of 10 to 100 μm coated on said plastic layer, and
• c.) a scratch-resistant layer having a thickness of 1 to 10 μm supported by said plastic film, which process comprises:
• 1.) providing said skin layer b.), either flat or in shaped form,
• 2.) subjecting said skin layer to heat treatment, the skin layer, being supported completely or partly by a mould surface, an auxiliary means for shaping at least part of the skin to the said mould surface being optionally provided so as to relax stresses in the skin, and crosslinking constituent elements of the skin layer;
• and
• 3.) joining the skin to said plastic layer a.) by hot pressing in a form, or by thermoplastic injection moulding or reactive injection moulding of the material of the plastic layer a.), the skin having been positioned in the bottom of the mould in such a way that a scratch-resistant layer c.) is in direct contact with the mould.

A process for preparing a glass-free automobile window which is at least partly transparent, and which meets French standard R43 for motor vehicle windows, which comprises:

• a.) a plastic layer having a thickness of 5 to 10 mm,
• b.) at least one skin layer of a plastic film having a thickness of 10 to 100 μm coated on said plastic layer, and
• c.) a scratch-resistant layer having a thickness of 1 to 10 μm supported by said plastic film, which process comprises:
• 1.) depositing the constituent elements of a scratch-resistant layer on a substantially flat plastic film;
• and
• 2.) shaping said film bearing the elements of the scratch-resistant layer into a shape which is the same as or at least similar to the ultimate shape of the end-product, while at the same time at least partly crosslinking the scratch-resistant layer.

A glass-free motor vehicle window, which is at least partly transparent, and which meets French standard R43 for motor vehicle windows, which comprises:

• a.) a plastic layer having a thickness of 5 to 10 mm,
• b.) at least one skin layer of a plastic film having a thickness of 10 to 100 μm coated on said plastic layer, and
• c.) a scratch-resistant layer having a thickness of 1 to 10 μm supported by said plastic film,
• wherein said scratch-resistant layer c.) is essentially inorganic or consists essentially of networks of entangled inorganic and organic molecular chains linked to each other by silicon-carbon bonds.