US 12,122,076 B2
Method for producing moulded parts from particle foams
Gerd Niemeyer, Feldkirch (AT); Wolfgang Teubert, Blumberg (DE); and Hans Wörthwein, Cleebronn (DE)
Assigned to Wörthwein-Teubert GbR, (DE)
Filed by Teubert-Wörthwein GbR, Blumberg (DE)
Filed on Jan. 18, 2022, as Appl. No. 17/577,427.
Application 17/577,427 is a continuation of application No. PCT/IB2020/056737, filed on Jul. 17, 2020.
Claims priority of application No. 102019119488.1 (DE), filed on Jul. 18, 2019.
Prior Publication US 2022/0134611 A1, May 5, 2022
Int. Cl. B29C 44/44 (2006.01); B29C 35/08 (2006.01); B29C 44/34 (2006.01); B29C 67/20 (2006.01)
CPC B29C 44/445 (2013.01) [B29C 35/0805 (2013.01); B29C 44/3461 (2013.01); B29C 67/205 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A process for the production of moulded parts from particle foams, comprising the steps of
a) providing particle foam particles,
b) wetting the particle foam particles with an aqueous emulsion of at least one polyolefin and thereby obtaining functionalisable particle foam particles,
c) drying the wetted and functionalisable particle foam particles,
d) shaping the functionalisable particle foam particles into shaped functionalisable particle foam particles,
e) heating the shaped functionalisable particle foam particles to a temperature below the melting range of the particle foam particles and thereby functionalising the shaped functionalisable particle foam particles, wherein the particle foam particles are bonded together, and
f) cooling and thereby obtaining the shaped particle foam particles, characterised in that the aqueous emulsion of the at least one polyolefin is an aqueous emulsion comprising at least one polyolefin converted to the liquid state with an anhydride of an unsaturated carboxylic acid and modified with methacrylic acid ester copolymers.