US2001019770A1PendingUtilityA1

Polymeric compositions

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Assignee: 3M INNOVATIVE PROPERTIES COPriority: Aug 9, 1999Filed: Dec 11, 2000Published: Sep 6, 2001
Est. expiryAug 9, 2019(expired)· nominal 20-yr term from priority
Inventors:Gilbert L. EianBret W. LudwigMilton H. Andrus, Jr.
Y10T428/2984C09D 127/20Y10T428/2991Y10T428/2989C08F 265/04C08J 2433/00C08J 2327/12C09D 127/16C08L 27/20Y10T428/2987C08L 51/003C08F 265/06C08J 3/226C08L 27/16Y10T428/2985
38
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Claims

Abstract

Described are compositions comprising core/shell particles and fluoropolymer, wherein the core comprises an ultraviolet absorber, as well as multiphase polymeric compositions comprising a polymeric core phase and a polymeric shelf phase, wherein the polymeric core phase comprises an ultraviolet absorber.

Claims

exact text as granted — not AI-modified
1 . A chemical composition comprising: 
 a polymeric particle having a core/shell structure, the core comprising an ultraviolet absorber; and    fluoropolymer.    
     
     
         2 . The composition of    claim 1    wherein the core is incompatible with the fluoropolymer.  
     
     
         3 . The composition of    claim 1    wherein the core comprises a polymer derived from monomers comprising ethyl acrylate.  
     
     
         4 . The composition of    claim 3    wherein the core polymer is derived from monomers further comprising a (meth)acrylate-functional ultraviolet absorber.  
     
     
         5 . The composition of    claim 3    wherein the core comprises a polymer prepared from monomers consisting essentially of ethyl acrylate, (meth)acrylate-functional ultraviolet absorber, and crosslinker.  
     
     
         6 . The composition of    claim 2    wherein the shell comprises a polymeric shell that is compatible with the fluoropolymer.  
     
     
         7 . The composition of    claim 2    wherein the polymeric shell comprises a poly(meth)acrylate.  
     
     
         8 . The composition of    claim 7    wherein the polymeric shell is prepared from monomers chosen from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, and mixtures thereof.  
     
     
         9 . The composition of    claim 1    wherein the fluoropolymer is prepared from fluorinated monomers comprising vinylidene fluoride, hexafluoropropene, and mixtures thereof.  
     
     
         10 . The composition of    claim 1    wherein the composition is an aqueous latex.  
     
     
         11 . The composition of    claim 1    wherein the composition is a powder.  
     
     
         12 . The composition of    claim 11    wherein the composition comprises agglomerate particles comprising core/shell particles and fluoropolymer particles fused together.  
     
     
         13 . The composition of    claim 1    wherein the core/shell particles comprise from about 10 to 50 parts by weight core particle, and from about 50 to 90 parts by weight polymeric shell.  
     
     
         14 . The composition of    claim 13    wherein the composition comprises from about 10 to 80 parts by weight core/shell particles and from about 20 to 90 parts by weight fluoropolymer.  
     
     
         15 . A multiphase polymeric composition comprising a polymeric core phase, a polymeric shell phase, and a fluoropolymer phase, 
 wherein the polymeric core phase comprises an ultraviolet absorber, and    wherein the polymeric core phase and the fluoropolymer phase do not substantially contact one another, but both the polymeric core phase and the fluoropolymer phase contact the polymeric shell phase.    
     
     
         16 . The composition of    claim 15    wherein domains of the polymeric shell phase surround domains of the polymeric core phase.  
     
     
         17 . The composition of    claim 15    wherein the polymeric core phase is incompatible with the fluoropolymer phase, and wherein the polymeric shell phase is compatible with both the polymeric core phase and the fluoropolymer phase.  
     
     
         18 . The composition of    claim 17    wherein the composition is thermodynamically stable.  
     
     
         19 . The composition of    claim 15    wherein the polymeric core phase comprises a core polymer derived from monomers comprising ethyl acrylate.  
     
     
         20 . The composition of    claim 19    wherein the core phase is a polymer prepared from monomers consisting essentially of ethyl acrylate and a (meth)acrylate-functional ultraviolet absorber.  
     
     
         21 . The composition of    claim 15    wherein the composition is a flexible film.  
     
     
         22 . The composition of    claim 15    wherein the polymeric shell phase comprises a shell polymer prepared from monomers chosen from the group consisting of methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, and mixtures thereof.  
     
     
         23 . The composition of    claim 15    wherein the fluoropolymer is prepared from fluorinated monomers comprising vinylidene fluoride, hexafluoropropene, and mixtures thereof.  
     
     
         24 . A method of preparing a multiphase polymeric composition comprising a polymeric core phase, a polymeric shell phase, and a polymeric film-forming phase, wherein the polymeric core phase comprises an ultraviolet absorber, the composition being prepared according to steps comprising: 
 powder coating onto a substrate polymeric materials comprising the polymeric core phase, the polymeric shell phase, and the polymeric film-forming phase, and fusing the polymeric materials to form a multiphase polymeric composition wherein the polymeric core phase and the polymeric film-forming phase do not substantially contact one another, but both the polymeric core phase and the polymeric film-forming phase contact the polymeric shell phase.    
     
     
         25 . The method of    claim 24    wherein the polymeric materials include core/shell particles comprising a core particle surrounded by a polymeric shell.  
     
     
         26 . The method of    claim 25    wherein the polymeric core phase comprises a core polymer prepared from monomers comprising ethyl acrylate.  
     
     
         27 . The method of    claim 25    wherein the polymeric materials are coated as a powder comprising agglomerate particles of core/shell particles and particles of the polymeric film-forming material.  
     
     
         28 . The method of    claim 27    wherein the agglomerate particles are prepared by spray drying a latex comprising core/shell particles and particles of polymeric film-forming material.  
     
     
         29 . The method of    claim 24    wherein the polymeric film-forming material is a fluoropolymer.  
     
     
         30 . The method of    claim 24    wherein the multiphase polymeric composition is thermodynamically stable.  
     
     
         31 . The method of    claim 24    wherein the multiphase polymeric composition is flexible.

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