Direction-independently impact-resistant 3-d molded parts

Patent metadata

Field	Value
Publication number	US-2016152833-A1
Application number	US-201414897734-A
Country	US
Kind code	A1
Filing date	Jun 11, 2014
Priority date	Jun 14, 2013
Publication date	Jun 2, 2016
Grant date	—

Abstract

The present invention relates to a coating composition comprising at least 30% by weight of at least one thermoplastic polymer having a mean molar mass of at least 100 000 g/mol, at least one UV-curable reactive diluent, at least one photoinitiator, at least one organic solvent, where the proportion of ethylenically unsaturated groups is at least 3 mol per kg of the solids content of the coating composition. The present invention relates more particularly to a moulding comprising a thermoplastic polymer, a film of a thermoplastic polymer and a surface coating of the film, said surface coating forming the surface of the moulding and having a thickness in the range of ≧0.1 μm and ≦20 μm, obtainable by coating the film with the coating composition. In this way, a non-directionally impact-resistant moulding having a scratch-resistant and solvent-resistant surface is provided.

First claim

1 .- 15 . (canceled)

16 . A coating composition comprising
(a) at least one thermoplastic polymer having a mean molar mass of at least 100 000 g/mol in a content of at least 30% by weight of the solids content of the coating composition; (b) at least 30% by weight of a UV-curable reactive diluent; (c) 0.1 to 10 parts by weight of at least one photoinitiator; and (d) at least one organic solvent, wherein the proportion of ethylenically unsaturated groups is at least 3 mol per kg of the solids content of the coating composition.

17 . The coating composition as claimed in claim 16 , wherein the thermoplastic polymer (a) has a Vicat softening temperature VET to ISO 306 of at least 90° C.

18 . The coating composition as claimed in claim 16 , wherein the thermoplastic polymer comprises polymethylmethacrylate or copolymers of 70% by weight to 99.5% by weight of methyl methacrylate and 0.5% by weight to 30% by weight of methyl acrylate.

19 . The coating composition as claimed in claim 16 , wherein the at least one UV-curable reactive diluent (b) comprises bifunctional, trifunctional, tetrafunctional, pentafunctional and/or hexafunctional acrylic and/or methacrylic monomers.

20 . The coating composition as claimed in claim 16 , wherein the reactive diluent (b) comprises alkoxylated diacrylates and/or dimethacrylates, alkoxylated triacrylates and/or trimethacrylates, alkoxylated tetraacrylates and/or tetramethacrylates, alkoxylated pentaacrylates and/or pentamethacrylates, alkoxylated hexaacrylates and/or hexamethacrylates, aliphatic urethane acrylates, polyester acrylates, polyacryloylacrylates and mixtures thereof.

21 . The coating composition as claimed in claim 16 , wherein the reactive diluent (b) comprises dipentaerythrityl penta-/hexaacrylate.

22 . A non-directionally impact-resistant 3D moulding comprising a thermoplastic polymer, a film of a thermoplastic polymer and a scratch-resistant and solvent-resistant surface coating of the film, said surface coating forming the surface of the moulding and having a thickness in the range from ≧0.1 μm to ≦20 μm, obtained by coating a surface of the film with a coating composition as claimed in claim 16 .

23 . The moulding as claimed in claim 22 , obtained by film insert moulding, wherein the film insert moulding comprises the filling of a 3D-formed film comprising the protective layer with the melt of a thermoplastic polymer on the side of the film remote from the protective layer.

24 . The moulding as claimed in claim 22 , wherein the film comprises polycarbonate.

25 . The moulding as claimed in claim 22 , wherein the thermoplastic polymer comprises polycarbonate.

26 . A film insert moulding process for production of a moulding, comprising the steps of
(i) coating a surface of a film with a moulding composition comprising
(a) at least one linear thermoplastic polymer having a mean molar mass of at least 100 000 g/mol in a content of 30% by weight of the solids content of the coating composition;
(b) at least 30% by weight of a UV-curable reactive diluent;
(c) 0.1 to 10 parts by weight of at least one photoinitiator; and
(d) at least one organic solvent,
wherein the proportion of ethylenically unsaturated groups is at least 3 mol per kg of the solids content of the coating composition and the thickness of the coating is in the range from ≧0.1 μm to ≦20 μm,
(ii) drying the coating; (iii) optionally cutting the film to size, delaminating, printing and/or thermally or mechanically forming the film; (iv) curing the coating by means of actinic radiation, preferably UV radiation; (v) insert-moulding the uncoated surface of the film with a thermoplastic polymer.

27 . The process as claimed in claim 26 , wherein the insert moulding (V) is effected by means of extrusion or injection moulding.

28 . A product comprising the moulding as claimed in claim 22 .

29 . The product as claimed in claim 28 , wherein the product is a transparent glazing element, cover or viewing window from the fields of architecture, automobile construction, rail vehicle construction, aircraft construction, the manufacture of visors for protective helmets and the production of electronic products or of transparent, semitransparent or nontransparent parts of interior trim or exterior trim of automobiles, rail vehicles or aircraft.

30 . An architectural glazing element, automobile glazing element, rail vehicle glazing element, water vehicle glazing element, aircraft glazing element, bodywork facing component, windshield, helmet visor, electronics housing component, or interior or exterior trim component of automobiles, rail vehicles, water vehicles or aircraft comprising the moulding as claimed in claim 22 .

Assignees

• Covestro Deutschland Ag

Inventors

• Kostromine Serguei
• Petzoldt Joachim
• Hovestadt Wieland
• Hobeika Sven
• Künzel Roland

Classifications

• B33Y70/00

  Materials specially adapted for additive manufacturing · CPC title

• B29C67/0081

  Operations & Transport · mapped topic

• C09D4/06 Primary

  {Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond} in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00 · CPC title

• B29C41/20

  incorporating preformed parts or layers, e.g. moulding inserts or for coating articles · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title