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US 11,767,616 B2Granted
Acrylic compositions including a hindered amine light stabilizer and methods of making and using the same
AssigneeGlen Raven, Inc.
InventorsDavid Buffington, Gary Kevin Hyde
Life of this patent
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Abstract
Acrylic compositions comprising a hindered amine light stabilizer are described herein. The acrylic composition may be in the form of a fiber, thread, yarn, and/or fabric. Also described herein are methods of making and using the acrylic compositions and articles comprising an acrylic composition as described herein.
Claims20
An acrylic fiber comprising:
- an acrylonitrile polymer having acrylonitrile units present in an amount of at least 85% by weight of the acrylonitrile polymer;
- and
- a hindered amine light stabilizer, wherein the hindered amine light stabilizer is within the acrylic fiber and is distributed throughout the polymer matrix of the acrylonitrile polymer, and
- wherein the acrylonitrile polymer is the primary fiber-forming substance for the acrylic fiber and the acrylonitrile polymer is selected from the group consisting of poly(acrylonitrile-co-vinyl acetate) (P(AN-VA), poly(acrylonitrile-co-methyl acrylate) (P(AN-MA), poly(acrylonitrile-co-methyl methacrylate), and any combination thereof,
- wherein the hindered amine light stabilizer has a water solubility at 20° C. of about 2% w/w or less, and
- wherein the hindered amine light stabilizer is present in an amount in a range from about 1% to about 10% by weight of the acrylic fiber.
3 more elements
A method of preparing an acrylic fiber, the method comprising:
- adding a hindered amine light stabilizer to an acrylonitrile polymer to provide a stabilized acrylic composition, wherein the acrylonitrile polymer has acrylonitrile units present in an amount of at least 85% by weight of the acrylonitrile polymer;
- and
- forming an acrylic fiber from the stabilized acrylic composition, the acrylic fiber comprising the hindered amine light stabilizer and the acrylonitrile polymer, wherein the hindered amine light stabilizer is within the acrylic fiber and is distributed throughout the polymer matrix of the acrylonitrile polymer, and
- wherein the acrylonitrile polymer is the primary fiber-forming substance for the acrylic fiber and the acrylonitrile polymer is selected from the group consisting of poly(acrylonitrile-co-vinyl acetate) (P(AN-VA), poly(acrylonitrile-co-methyl acrylate) (P(AN-MA), poly(acrylonitrile-co-methyl methacrylate), and any combination thereof, thereby preparing the acrylic fiber,
- wherein the hindered amine light stabilizer has a water solubility at 20° C. of about 2% w/w or less, and
- wherein the hindered amine light stabilizer is present in an amount in a range from about 1% to about 10% by weight of the acrylic fiber.
3 more elements
Dependencies are inferred from the claim text.