FILMS INCLUDING THERMOPLASTIC SILICONE BLOCK COPOLYMERS

• US 20070177273A1
• Filed: 12/21/2006
• Published: 08/02/2007
• Est. Priority Date: 12/23/2005
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Johnson, Stephen, Leir, Charles, Benson, Karl, Purgett, Mark, Hansen, Richard, Sherman, Audrey, Schneider, Hildegard, Liu, Richard
• Granted Patent: US 8,067,094 B2
• Time in Patent Office: Days
• US Class Current: 359/584
• CPC Class Codes: B32B 2250/05 5 or more layers
• CPC Class Codes: B32B 2250/24 All layers being polymeric
• CPC Class Codes: B32B 2274/00 Thermoplastic elastomer material thermoplastic elastomer fibres B32B2262/0215, thermoplastic elastomer particles B32B2264/0221, thermoplastic elastomer foam B32B2266/0292
• CPC Class Codes: B32B 2307/21 Anti-static
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/40 having particular optical properties light or UV resistant B32B2307/71
• CPC Class Codes: B32B 2307/418 Refractive
• CPC Class Codes: B32B 2307/42 Polarizing, birefringent, filtering
• CPC Class Codes: B32B 2307/518 bi-axially
• CPC Class Codes: B32B 2307/554 Wear resistance
• CPC Class Codes: B32B 2307/584 Scratch resistance
• CPC Class Codes: B32B 2551/00 Optical elements
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/18 characterised by the use of special additives
• CPC Class Codes: B32B 27/28 comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
• CPC Class Codes: B32B 27/283 comprising polysiloxanes
• CPC Class Codes: B32B 27/34 comprising polyamides
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 37/153 at least one layer is extruded and immediately laminated while in semi-molten state
• CPC Class Codes: B32B 7/023 Optical properties
• CPC Class Codes: B32B 7/10 : at least one layer having inter-reactive properties
• CPC Class Codes: C08G 77/455 : containing polyamide, polyesteramide or polyimide sequences
• CPC Class Codes: C08L 77/00 : Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C08L 83/10 : Block- or graft-copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C08L51/08, C08L53/00
• CPC Class Codes: C09D 183/10 : Block or graft copolymers containing polysiloxane sequences obtained by polymerising a compound having a carbon-to-carbon double bond on to a polysiloxane C09D151/08, C09D153/00
• CPC Class Codes: G02B 1/04 : made of organic materials, e.g. plastics G02B1/08 takes precedence
• CPC Class Codes: G02B 5/0841 : comprising organic materials, e.g. polymers
• CPC Class Codes: G02B 5/305 : including organic materials, e.g. polymeric layers
• CPC Class Codes: Y10T 428/31663 : As siloxane, silicone or silane
• CPC Class Codes: Y10T 428/31725 : Of polyamide
• CPC Class Codes: Y10T 428/31736 : Next to polyester

Abstract

A composite film includes a first film and a second film contiguous to the first film. The first film includes a light transmissive material. In one embodiment, the second film includes a polydiorganosiloxane polyamide block copolymer. In another embodiment, the second film includes a polydiorganosiloxane polyoxamide block copolymer.

Claims

1. A composite film comprising:

a first film comprising a light transmissive material; and

a second film contiguous to said first film, the second film comprising a polymeric material comprising at least 2 repeat units of Formula I;

wherein each R¹ is independently an alkyl, haloalkyl, aralkyl, alkenyl, aryl, or aryl substituted with an alkyl, alkoxy, or halo;

each Y is independently an alkylene, aralkylene, or a combination thereof,

G is a divalent residue equal to a diamine of formula R³HN-G—

NHR³ minus the two —

NHR³ groups;

R³ is hydrogen, alkyl, or taken together with G and to the nitrogen to which they are both attached form a heterocyclic group;

n is independently an integer of 0 to 1500;

each B is independently a covalent bond, an alkylene of 4-20 carbons, an aralkylene, an arylene, or a combination thereof, and

p is an integer of 1 to 10.

2. The film of claim 1 wherein each B is a covalent bond.

3. The film of claim 1, wherein the light transmissive material is birefringent.

4. The composite film of claim 1 wherein the light transmissive material is selected from the group consisting of polyalkylene naphthalates, isomers of polyalkylene naphthalates, and copolymers of polyalkylene naphthalates.

5. The composite film of claim 1 wherein the light transmissive material is selected from the group consisting of polyalkylene terephthalates and copolymers of polyalkylene terephthalates.

6. The composite film of claim 1 wherein the second film includes one or more materials selected from the group consisting of antistatic additives, ultraviolet light absorbers (UVAs), hindered amine light stabilizers (HALS), dyes, colorants, pigments, antioxidants, slip agents, low adhesion materials, conductive materials, abrasion resistant materials, optical elements, dimensional stabilizers, adhesives, tackifiers, flame retardants, phosphorescent materials, fluorescent materials, nanoparticles, anti-graffiti agents, dew-resistant agents, load bearing agents, silicate resins, light diffusing materials, light absorptive materials and optical brighteners.

7. The composite film of claim 1 wherein the first film comprises a plurality of layers.

8. The composite film of claim 1 further comprising a third film, wherein the second film is disposed between the first film and the third film.

9. The composite film of claim 8 wherein the third film comprises a plurality of layers.

10. A composite film comprising:

a first film comprising a light transmissive material; and

a second film contiguous to said first film, the second film comprising a polydiorganosiloxane polyamide block copolymer.

11. The composite film of claim 10, wherein the second film comprises a polydiorganosiloxane polyoxamide block copolymer.

12. The film of claim 10, wherein the light transmissive material is birefringent.

13. The composite film of claim 10 wherein the light transmissive material is selected from the group consisting of polyalkylene naphthalates, isomers of polyalkylene naphthalates, and copolymers of polyalkylene naphthalates.

14. The composite film of claim 10 wherein the light transmissive material is selected from the group consisting of polyalkylene terephthalates and copolymers of polyalkylene terephthalates.

15. The composite film of claim 10 wherein the second film includes one or more materials selected from the group consisting of antistatic additives, ultraviolet light absorbers (UVAs), hindered amine light stabilizers (HALS), dyes, colorants, pigments, antioxidants, slip agents, low adhesion materials, conductive materials, abrasion resistant materials, optical elements, dimensional stabilizers, adhesives, tackifiers, flame retardants, phosphorescent materials, fluorescent materials, nanoparticles, anti-graffiti agents, dew-resistant agents, load bearing agents, silicate resins, light diffusing materials, light absorptive materials and optical brighteners.

16. The composite film of claim 10 wherein the first film comprises a plurality of layers.

17. The composite film of claim 10 further comprising a third film, wherein the second film is disposed between the first film and the third film.

18. The composite film of claim 16 wherein the third film comprises a plurality of layers.