Co-crosslinker systems for encapsulation films comprising ethylene glycol di(meth)acrylate compounds

Patent metadata

Field	Value
Publication number	US-2016177124-A1
Application number	US-201514973145-A
Country	US
Kind code	A1
Filing date	Dec 17, 2015
Priority date	Dec 19, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A first composition (A) contains (i) at least one compound (I) selected from the group consisting of triallyl isocyanurate, and triallyl cyanurate, wherein the compound (I) is preferably triallyl isocyanurate, and (ii) at least one ethylene glycol di(meth)acrylate compound. In addition, a second composition (B) contains the first composition (A) and at least one polyolefin copolymer. Composition (B) can be used for production of a film for encapsulation of an electronic device, especially a solar cell.

First claim

1 . A composition (A), comprising:
(i) at least one compound (I) selected from the group consisting of triallyl isocyanurate, and triallyl cyanurate; and (ii) at least one compound of the chemical structure (II) with

wherein R 1 , R 2 are each independently H or methyl,
and wherein the proportion of all the compounds of the chemical structure (II) in the composition (A), based on all the compounds (I) in the composition (A), is in the range of 0.01 mol % to 13.5 mol %.

2 . The composition (A) according to claim 1 , wherein the compound (I) is triallyl isocyanurate.

3 . The composition (A) according to claim 1 , wherein R 1 and R 2 are the same.

4 . The composition (A) according to claim 3 , wherein R 1 =R 2 =methyl.

5 . The composition (A) according to claim 1 , in which the proportion of all the compounds of the chemical structure (II), based on all the compounds of the chemical structure (I), is in the range of 0.05 mol % to 12.0 mol %.

6 . The composition (A) according to claim 5 , in which the proportion of all the compounds of the chemical structure (II), based on all the compounds of the chemical structure (I), is in the range of 2.5 mol % to 5.2 mol %.

7 . A composition (B), comprising:
at least one polyolefin copolymer; and a composition (A) according to claim 1 .

8 . The composition (B) according to claim 7 , wherein the polyolefin copolymer is an ethylene-vinyl acetate copolymer.

9 . The composition (B) according to claim 8 , wherein the ethylene-vinyl acetate copolymer has a vinyl acetate content of 15% to 50% by weight, based on the total weight of the ethylene-vinyl acetate copolymer, determined to ASTM D 5594:1998.

10 . The composition (B) according to claim 7 , in which the proportion of composition (A) is 0.05% to 10% by weight, based on the mass of all the polyolefin copolymers encompassed by the composition (B).

11 . The composition (B) according to claim 7 , further comprising at least one initiator selected from the group consisting of peroxidic compounds, azo compounds, photoinitiators.

12 . The composition (B) according to claim 11 , wherein the initiator is a peroxidic compound.

13 . The composition (B) according to claim 7 , further comprising at least one compound (D) selected from the group consisting of crosslinkers, silane coupling agents, antioxidants, ageing stabilizers, metal oxides, metal hydroxides, and white pigments.

14 . The composition (B) according to claim 13 , wherein the compound (D) is a silane coupling agent.

15 . A film for encapsulation of an electronic device, comprising: the composition (B) according to claim 7 in crosslinked form.

16 . The film according to claim 15 , wherein the device is a solar cell.

17 . A method for encapsulating an electronic device, comprising:
contacting said electronic device with the composition (B) of claim 7 and crosslinking said composition (B).

18 . The method according to claim 17 , wherein the device is a solar cell.

19 . The method according to claim 18 , wherein the crosslinking of the composition (B) occurs in the course of solar module lamination.

Assignees

• Ulbricht Daniel
• Hein Marcel
• Kleff Frank
• Schauhoff Stephanie
• Ohlemacher Juergen
• Evonik Degussa Gmbh

Inventors

• Ulbricht Daniel
• Hein Marcel
• Kleff Frank
• Schauhoff Stephanie
• Ohlemacher Juergen

Classifications

• C08F226/06

  by a heterocyclic ring containing nitrogen · CPC title

• C08L51/06

  grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond · CPC title

• C09D139/04 Primary

  Homopolymers or copolymers of monomers containing heterocyclic rings having nitrogen as ring member · CPC title

• C08F255/026 Primary

  on to ethylene-vinylester copolymers · CPC title

• C09D123/0853

  Vinylacetate · CPC title