Particulate, expandable polymer, method for producing particulate expandable polymer, as well as a special use of the obtained foam material
OwnerJan Noordegraaf, Franciscus Petrus Antonius Kuijstermans +1inventors
InventorsJan Noordegraaf, Franciscus Petrus Antonius Kuijstermans, Josephus Petrus Maria De Jong
Life of this patent
Estimating the term…
Abstract
The present invention relates to a particulate, expandable polymer, for example polystyrene (EPS) or polylactic acid (PLA) or a combination thereof, which can be processed to form a foam having a fine cell structure and a low density, and which contains a thermal insulation value-increasing material so as to increase the thermal insulation value thereof The present invention further relates to a method for producing such particulate, expandable polymer, as well as to a foam material based on such a polymer.
Claims20
A particulate, expandable polymer which can be processed to form a foam having a fine cell structure and a low density, said polymer comprising active carbon having a particle size D10 of at most 12 micrometer for increasing the thermal insulation value, wherein the particle size distribution of the active carbon is according to the following formula:
- particle
-
-
- size
-
-
- distribution
- =
- (
- D
-
-
- 90
- -
- D
-
-
- 10
- )
- D
-
-
- 50
- ≤
- 2.0
- wherein D10, D50 and D90 are the 10th, 50m and 90th percentile respectively, indicating in a curve of the cumulative particle size the particle sizes when the accumulated amounts of the particles are 10%, 50%, and 90% respectively.
A method for producing particulate expandable polymer which can be processed to form a foam having a fine cell structure and a low density, said polymer comprising active carbon having a particle size D10 of at most 12 micrometer for increasing the thermal insulation value comprising feeding a polymer to an extruder, mixing with at least a blowing agent and active carbon having a particle size D10 of at most 12 micrometer and subsequently extruded, cooled and further reduced to particles, wherein the particle size distribution of the active carbon is according to the following formula:
- particle
-
-
- size
-
-
- distribution
- =
- (
- D
-
-
- 90
- -
- D
-
-
- 10
- )
- D
-
-
- 50
- ≤
- 2.0
- wherein D10, D50 and D90 are the 10th, 50th and 90th percentile, respectively, indicating in a curve of the cumulative particle size the particle sizes when the accumulated amounts of the particles are 10%, 50%, and 90%, respectively.
A method for producing particulate expandable polymer which can be processed to form a foam having a fine cell structure and a low density, said polymer comprising active carbon having a particle size D10 of at most 12 micrometer for increasing the thermal insulation value comprising feeding a polymer to an extruder and mixing with active carbon having a particle size D10 of at most 12 micrometer, and is then extruded, cooled and further reduced to particles and subsequently subjected to an impregnation treatment with blowing agent so as to obtain a material which is cooled and which contains blowing agent, wherein the particle size distribution of the active carbon is according to the following formula:
- particle
-
-
- size
-
-
- distribution
- =
- (
- D
-
-
- 90
- -
- D
-
-
- 10
- )
- D
-
-
- 50
- ≤
- 2.0
- wherein D10, D50 and D90 are the 10th, 50th and 90th percentile respectively, indicating in a curve of the cumulative particle size the particle sizes when the accumulated amounts of the particles are 10%, 50%, and 90%, respectively.
Dependencies are inferred from the claim text.