Co-crosslinker systems for encapsulation films comprising (meth)acrylamide compounds

Patent metadata

Field	Value
Publication number	US-2016177014-A1
Application number	US-201514974579-A
Country	US
Kind code	A1
Filing date	Dec 18, 2015
Priority date	Dec 19, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

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

First claim

1 . A composition (Z), 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 hydrogen or methyl;
A is selected from the group consisting of the following a, b and c)
a) an unbranched or branched alkylene group which has 1 to 20 carbon atoms and in which at least one hydrogen radical may be replaced by a halogen radical and in which one or two hydrogen radicals may each be replaced by a radical selected from the group consisting of

—OR 3 , —C(═O)NR 4 R 5 ,
b) an arylene group which has 6 to 14 carbon atoms and in which at least one hydrogen radical may be replaced by a halogen radical or an unbranched or branched alkyl radical having 1 to 10 carbon atoms and in which one or two hydrogen radicals may each be replaced by a radical selected from the group consisting of —OR 6 , —C(═O)NR 7 R 8 , and

c) a bridging radical of the chemical structure -A 1 -X-A 2 -;
wherein R 3 , R 4 , R 5 , R 6 , R 7 , R 8 are each independently selected from the group consisting of hydrogen, and a branched or unbranched alkyl radical having 1 to 10 carbon atoms;
wherein A 1 , A 2 are each independently a branched or unbranched alkylene group having 1 to 10 carbon atoms;
and wherein X is selected from the group consisting of —O—, —S—S—, —S—, and —NR 9 — with R 9 =unbranched or branched alkyl radical having 1 to 10 carbon atoms.

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

3 . The composition (Z) according to claim 1 , wherein R 1 , R 2 are each independently hydrogen or methyl, and wherein A is selected from the group consisting of an unbranched or branched alkylene group having 1 to 12 carbon atoms, phenylene, —(CH 2 ) 2 —O—(CH 2 ) 2 —, and —CH 2 —O—CH 2 —.

4 . The composition (Z) according to claim 3 , wherein R 1 ═R 2 =hydrogen and A=—CH 2 —.

5 . The composition (Z) according to claim 1 , in which the proportion of all the compounds of the chemical structure (II), based on all the compounds (I), is in the range of 1.0 to 161.9 mol %.

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

7 . The composition (B) according to claim 6 , wherein the polyolefin copolymer is an ethylene-vinyl acetate copolymer.

8 . The composition (B) according to claim 7 , 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, as determined according to ASTM D 5594:1998.

9 . The composition (B) according to claim 6 , in which the proportion of composition (Z) is 0.05% to 10% by weight, based on the mass of all the polyolefin copolymers encompassed by the composition (B).

10 . The composition (B) according to claim 6 , further comprising at least one initiator selected from the group consisting of peroxidic compounds, azo compounds, and photoinitiators.

11 . The composition (B) according to claim 10 , wherein the initiator is a peroxidic compound.

12 . The composition (B) according to claim 6 , further comprising at least one compound (A) selected from the group consisting of crosslinkers, silane coupling agents, antioxidants, ageing stabilizers, metal oxides, metal hydroxides, and white pigments.

13 . The composition (B) according to claim 12 , wherein the compound (A) is a silane coupling agent.

14 . A film for encapsulation of an electronic device, comprising: the composition (B) according to claim 6 in crosslinked form.

15 . The film according to claim 14 , wherein the device is a solar cell.

16 . A method for encapsulating an electronic device, comprising:
contacting said electronic device with the composition (B) of claim 6 and crosslinking said composition (B).

17 . The method according to claim 16 , wherein the device is a solar cell.

18 . The method according to claim 17 , 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

• C08F255/026 Primary

  on to ethylene-vinylester copolymers · CPC title

• C08J5/18

  Manufacture of films or sheets · CPC title

• C08K5/14

  Peroxides · CPC title

• C08F222/385

  Monomers containing two or more (meth)acrylamide groups, e.g. N,N'-methylenebisacrylamide · CPC title

• C08K5/5425

  containing at least one C=C bond · CPC title