Painted polyolefin articles

Patent metadata

Field	Value
Publication number	US-10557005-B2
Application number	US-201415319577-A
Country	US
Kind code	B2
Filing date	Jun 23, 2014
Priority date	Jun 23, 2014
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A painted article includes a primer layer between a substrate and a paint layer, of which the substrate is the product of a substrate forming composition including an olefin block copolymer and a polypropylene polymer having a density from 0.89 g/cm3 and 0.92 g/cm3. The substrate is free of (1) phthalate-based plasticizer, (2) halogen-containing polymer, and (3) leachable, small polymeric units derived from styrene monomer.

First claim

What is claimed is:

1. A painted article, comprising:
a primer layer between a substrate and a paint layer, the substrate being the product of a substrate forming composition including at least 50 wt % of an olefin block copolymer, based on the total weight of the substrate forming composition, and a polypropylene polymer having a density from 0.89 g/cm 3 and 0.92 g/cm 3 ,
wherein the substrate is free of (1) phthalate-based plasticizer, (2) halogen-containing polymer, and (3) leachable, small polymeric units derived from styrene monomer, and
wherein the substrate forming composition comprises an alpha-olefin comonomer content of less than 9.7 mol %.

2. The painted article as claimed in claim 1 , wherein an outermost surface of the painted article has an adhesion score of 0 according to ISO 2409 and resistance to cohesive delamination as demonstrated by the ability to pass 10 cycles of an eraser abrasion test.

3. The painted article as claimed in claim 2 , wherein:
the olefin block copolymer is a copolymer of ethylene and a C 3-20 alpha-olefin.

4. The painted article as claimed in claim 2 , wherein:
the olefin block copolymer includes chemically differentiated units that are joined end-to-end with respect to polymerized ethylenic functionality and a C 3-20 alpha-olefin functionality.

5. The painted article as claimed in claim 1 , wherein the substrate is painted without other surface treatment with paint free of phthalate-based plasticizer, and the paint layer includes one of SEBS and/or SBS based paint and acrylic or acrylic-modified paint.

6. The painted article as claimed in claim 1 , wherein the painted article is at least one of a toy, footwear, furniture, sporting good, gasket, apparel, hose or tubing, and a component for a consumer electronic device or an appliance.

Assignees

• Dow Global Technologies Llc

Inventors

• Han Tao
• Munro Jeffrey C
• Madenjian Lisa S
• Yang Hong

Classifications

• C08L53/00

  Compositions of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers · CPC title

• C08L23/12

  Polypropene · CPC title

• C08J2353/00

  Characterised by the use of block copolymers containing at least one sequence of a polymer obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers · CPC title

• C08J2423/12

  Polypropene · CPC title

• B05D7/544

  the first layer is let to dry at least partially before applying the second layer · CPC title