Polymeric articles having a textured surface and frosted appearance
AssigneeArkema Inc.
InventorsShi-Jun Yang, Fabio Giberti, Ralph Howard Clark, Leslie Alan Cohen
Life of this patent
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Abstract
Disclosed is a polymeric article having a frosted and/or surface textured finish made from a polymeric resin comprised of a polymeric matrix and polymeric particles which are substantially spherical, highly crosslinked, have a mean particle size of between 15 and 70 micrometers and have a particle size distribution between 10-110 micrometers.
Claims11
An extruded polymeric article having a frosted and textured surface appearance comprised of a polymeric matrix and polymeric particles which are substantially spherical, highly crosslinked, have a mean particle size of between 35 to 70 micrometers and have a particle size distribution between 10-110 micrometers wherein the article has:
- a) a Haze number as determined by ASTM D1003 of at least 90%,
- b) an opacity as determined by ASTM D2805-80 of at least 10%,
- c) a minimum surface roughness of 0.5 micrometers to 30 micrometers as measured using ASME methods B461.1 B461.2 and Y14.36;
- and
- d) a Total White Light Transmission of greater than 77.1% for the clear form, as determinated by a Hunterlab colorimeter_D25 model using ASTM E1331 and ASTM E1164,
- wherein said determinations are made using an 0.125 inch thick extruded sheet comprised of the polymeric matrix and polymeric particles;
- wherein said highly crosslinked polymeric particles arc comprised of:
- 15-35% by weight styrene;
- 65-85% by weight alkyl methacrylate or alkyl acrylate or a combination thereof;
- and
- 0.1-2.5% by weight crosslinking agent.
A resin comprised of:
- a) 60-85% by weight, matrix comprised of polymethyl methacrylate;
- and
- b) 5-60% by weight, highly crosslinked spherical polymeric particles comprised of:
- 15-35% by weight, styrene
- 65-85% by weight, methyl methacrylate
- 0.5-1.5% by weight, alkyl methacrylate;
- wherein the polymeric particles have a mean particle size of 35-70 micrometers, and a particle size distribution of between 10-110 micrometers, and wherein a 0.125 inch thick sheet extruded from said resin, has a Haze number as determined by ASTM D1003 of at least 90%, an opacity as determined by ASTM D2805-80 would be at least 10%, a minimum surface roughness of 0.5 micrometers to 30 micrometers as measured using ASME methods B461.1 B36.1.2 and Y14.36 and a Total White Light Transmission of greater than 77.1% for the clear form measured by a Hunterlab colorimeter-D25 model using ASTM E1331 and ASTM E1164.
A resin comprised of:
- a) 20-90% by weight, matrix comprised of polymethyl methacrylate or alkyl methylacrylate/alkyl acrylate copolymer;
- h) 0-50% by weight, modifiers;
- and
- c) 5-60% by weight, highly crosslinked spherical polymeric particles comprised of about 15 to 35% by weight, styrene, 65-85% by weight, alkyl methacrylate, alkyl acrylate, or a mixture thereof and crosslinking agent wherein the polymeric particles have a mean particle size of 35 -70 micrometers, and a particle size distribution of between 10-110 micrometers, and wherein a 0.125 inch thick sheet extruded from said resin, has a Haze number as determined by ASTM D1003 of at least 90%, an opacity as determined by ASTM D2805-80 would be at least 10%, a minimum surface roughness of 0.5 micrometers to 30 micrometers as measured using ASME methods B46.1.1 B36.1.2 and Y14.36 and a Total White Light Transmission of greater than 77.1% for the clear form measured by a Hunterlab colorimeter_D25 model using ASTM E1331 and ASTM E1164.
Dependencies are inferred from the claim text.