Polymer material for use in a 3D printing process

Patent metadata

Field	Value
Publication number	US-12515396-B2
Application number	US-202118026402-A
Country	US
Kind code	B2
Filing date	Nov 16, 2021
Priority date	Nov 19, 2020
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

A polymer material in manufacture of 3D articles by means of additive manufacturing, the polymer material including: a) at least one propylene polymer P having a flexural modulus determined according to ISO 178:2019 standard of at least 150 MPa, b) at least one propylene-based elastomer PBE having a flexural modulus determined according to ISO 178:2019 standard of not more than 100 MPa, and c) at least one solid inorganic compound SC.

First claim

The invention claimed is:

1 . A method for producing a 3D article comprising the following steps:
i) providing a digital model of the 3D article; and ii) based on the digital model, printing a polymer material using a 3D printer to form the 3D article, wherein the polymer material comprises: a) at least one propylene polymer P having a flexural modulus determined according to ISO 178:2019 standard of at least 150 MPa, b) at least one propylene-based elastomer PBE having a flexural modulus determined according to ISO 178:2019 standard of not more than 100 MPa, and c) at least one solid inorganic compound SC.

2 . The method according to claim 1 , wherein the method is a fused filament fabrication process or a fused particle fabrication process.

3 . The method according to claim 1 , wherein the at least one propylene polymer P has a flexural modulus determined according to ISO 178:2019 standard of not more than 1500 MPa and/or a xylene cold soluble fraction determined according to ISO 16152 2005 standard of not more than 60 wt.-%.

4 . The method according to claim 1 , wherein the at least one propylene polymer P comprises 5-70 wt.-% of the total weight of the polymer material.

5 . The method according to claim 1 , wherein the at least one propylene-based elastomer PBE is a propylene-ethylene copolymer having a propylene content of at least 60 wt.-% based on the weight of the copolymer and an ethylene content of 5-20 wt.-% based on the weight of the copolymer.

6 . The method according to claim 1 , wherein the at least one propylene-based elastomer PBE comprises 5-75 wt.-% of the total weight of the polymer material.

7 . The method according to claim 1 , wherein the at least one propylene-based elastomer PBE comprises a first propylene-based elastomer PBE 1 having a melt flow rate (230° C./2.16 kg) determined according to ISO 1133-1 standard of at least 15 g/10 min and a second propylene-based elastomer PBE 2 having a melt flow rate (230° C./2.16 kg) determined according to ISO 1133-1 standard of not more than 10 g/10 min.

8 . The method according to claim 1 , wherein the at least one solid inorganic compound SC comprises at least at least 2.5 wt.-% of the total weight of the polymer material.

9 . The method according to claim 1 , wherein the at least one solid inorganic compound SC comprises at least one inorganic filler F.

10 . The method according to claim 1 , wherein the at least one solid inorganic compound SC comprises at least one flame retardant FR.

11 . The method according to claim 1 , wherein the at least one solid inorganic compound SC comprises at least one color pigment CP.

12 . The method according to claim 1 , wherein the polymer material has an elastic modulus determined according to ISO 527-1:2019 standard of not more than 200 MPa and/or a shore D hardness determined according to DIN 53505-D:2000 of not more than 75.

13 . The method according to claim 1 , wherein the 3D printer is a fused filament fabrication printer.

14 . The method according to claim 1 , wherein the 3D printer is a fused particle fabrication printer.

15 . The method according to claim 1 , wherein the 3D article is a roofing detail part for sealing of a roof element.

16 . The method according to claim 15 , wherein the digital model of the roofing detail part is calculated based on a digital model of the roof element.

17 . A roofing detail part for sealing of a roofing element, wherein the roofing detail part is obtained by the method of claim 15 .

18 . The method according to claim 1 , wherein the at least one propylene polymer P has a flexural modulus determined according to ISO 178:2019 standard of not more than 1250 MPa and/or a xylene cold soluble fraction determined according to ISO 16152 2005 standard of not more than 60 wt.-%.

Assignees

• Sika Tech Ag

Inventors

• Z'Rotz Roy
• Huebscher Peter
• Roskamp Robert
• Ackermann Herbert

Classifications

• B29L2031/108

  Roofs · CPC title

• B29K2105/165

  Hollow fillers, e.g. microballoons or expanded particles · CPC title

• B29K2105/08

  of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns · CPC title

• B29K2105/0026

  Flame proofing or flame retarding agents · CPC title

• B29K2023/16

  EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers · CPC title