Composition and method for manufacturing a film comprising thiourethane layer

1. A film for glass bonding comprising:

a thiourethane layer comprising a heterocyclo-alkanediyl-based repeat unit indicated by Formula 1,

and a linear alkanediyl-based repeat unit indicated by Formula 2,

and

a base layer, disposed on a surface of the thiourethane layer, comprising a polyvinyl acetal resin and a plasticizer,

wherein in the Formula 1, R1 is —O— or —S—, and X is a heterocyclo-alkanediyl group having carbon atoms of 3 to 10 and sulfur atoms of 1 to 5,

wherein in the Formula 2, R2 is —O— or —S—, and n2 is an integer of 4 to 10, and

wherein the thiourethane layer comprises a wedge-shaped section whose thickness varies in a width direction of the film in part or the whole of the thiourethane layer.

2. The film of claim 1 ,

wherein the heterocyclo-alkanedyil-based repeat unit comprises a repeat unit indicated by Formula 3

wherein R1 is —O— or —S—, and n11 and n12 are respectively independent integers of 0 to 3.

3. The film of claim 1 ,

wherein the thiourethane layer has a refractive index of 1.5 or more, and a modulus of 300 kgf/mm 2 or less.

4. A manufacturing method for a film comprising:

putting a thiourethane resin comprising a thiourethane-based repeat unit indicated by Formula 1,

and a linear alkanedyil-based repeat unit indicated by Formula 2,

into an extruder;

extruding the thiourethane resin at a temperature of 120 to 200° C. to manufacture a thiourethane layer;

putting a resin composition comprising a polyvinyl acetal resin and a plasticizer into an extruder and extruding the resin composition to manufacture a base layer; and

hot pressing the base layer disposed on a surface of on the thiourethane layer to form the film,

wherein the film comprises the thiourethane layer and the base layer disposed on a surface of the thiourethane layer, and

wherein the film is a film for glass bonding,

wherein in the Formula 1, R1 is —O— or —S—, and X is a heterocyclic-alkanedyil group having carbon atoms of 4 to 10 and sulfur atoms of 1 to 5,

wherein in the Formula 2, R2 is —O— or —S—, and n2 is an integer of 4 to 10, and

wherein the thiourethane layer comprises a wedge-shaped section whose thickness varies in a width direction of the film in part or the whole of the thiourethane layer.

5. A light transmitting laminate comprising:

a first light transmitting layer;

the film disposed on a surface of the first light transmitting layer in accordance with claim 1 ; and

a second light transmitting layer disposed on the film.