Water Based Concentrated Product Forms of Photoinitiators Made by a Heterophase Polymerization Technique

Patent metadata

Field	Value
Publication number	US-2016137756-A1
Application number	US-201615006329-A
Country	US
Kind code	A1
Filing date	Jan 26, 2016
Priority date	Jul 4, 2006
Publication date	May 19, 2016
Grant date	—

Abstract

The invention relates to a concentrated aqueous polymer dispersion with an average particle size of less than 1000 nm comprising
g) a polymer carrier prepared by heterophase radical polymerization of at least one ethylenically unsaturated monomer in the presence of h) a non-polar photoinitiator and/or photolatent catalyst and i) optionally a non-ionic, cationic or anionic surfactant,

wherein the weight ratio of the non-polar photoinitiator and/or photolatent catalyst to the polymer carrier is greater than 20 parts of photoinitiator and/or photolatent catalyst per 100 parts of polymer carrier.

First claim

1 - 6 . (canceled)

7 . A process for the preparation of a concentrated aqueous polymer dispersion with an average particle size of less than 1000 nm comprising the step
polymerizing at least one ethylenically unsaturated monomer in the presence of a photoinitiator and/or a photolatent catalyst by heterophase radical polymerization; wherein the weight ratio of the photoinitiator and/or a photolatent catalyst to the polymer carrier formed from the ethylenically unsaturated monomer is equal or greater than 35 parts of photoinitiator and/or photolatent catalyst per 100 parts of polymer carrier.

8 . A process according to claim 7 comprising the steps of
a) dissolving, emulsifying or dispersing a photoinitiator and/or photolatent catalyst in at least one ethylenically unsaturated monomer;
b) preparing a conventional oil in water emulsion of said photoinitiator and/or photolatent catalyst dissolved, emulsified or dispersed in at least one ethylenically unsaturated monomer;
c) homogenizing the conventional emulsion to a mini-emulsion wherein the droplets of the organic phase have an average diameter below 1000 nm;
d) polymerizing the mini-emulsion by adding a polymerization initiator; wherein the weight ratio of the photoinitiator and/or a photolatent catalyst to the polymer carrier formed from the ethylenically unsaturated monomer equal or greater than 35 parts of photoinitiator and/or photolatent catalyst per 100 parts of polymer carrier.

9 . A process for preparing a polymer powder by preparing a concentrated aqueous polymer dispersion according to claim 7 followed by vaporizing the volatile components of the concentrated aqueous polymer dispersion.

10 . A polymer powder obtainable by a process according to claim 9 .

11 . Aqueous or non-aqueous formulations, coatings, inks, adhesives or in formulations for electronic materials comprising the aqueous polymer dispersion prepared according to claim 7 .

12 . A process for preparing a polymer powder by preparing a concentrated aqueous polymer dispersion according to claim 8 followed by vaporizing the volatile components of the concentrated aqueous polymer dispersion.

13 . A polymer powder obtained by a process according to claim 12 .

14 . Aqueous or non-aqueous formulations, coatings, inks, adhesives or in formulations for electronic materials comprising the polymer powder according to claim 10 .

15 . Aqueous or non-aqueous formulations, coatings, inks, adhesives or in formulations for electronic materials comprising the polymer powder according to claim 13 .

Assignees

• Basf Se

Inventors

• Schellenberg Carsten
• Auschra Clemens
• Peter Wolfgang
• Oliver Heinrich Frank
• Tanabe Junichi

Classifications

• C08F2/50 Primary

  with sensitising agents · CPC title

• C08F2/22 Primary

  Emulsion polymerisation · CPC title

• C08L2201/54

  Aqueous solutions or dispersions · CPC title

• C08L33/12

  Homopolymers or copolymers of methyl methacrylate · CPC title

• G03F7/031

  Organic compounds not covered by group G03F7/029 · CPC title