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UV stabilizing additive composition

a technology of additive composition and uv stabilization, which is applied in the direction of chemical inhibitors, chemical apparatus and processes, etc., can solve the problems of degradation of a wide variety of materials, polymer materials such as plastics, often discoloration, loss of gloss,

Inactive Publication Date: 2005-03-03
STRETANSKI JOSEPH A +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Exposure to sunlight and other sources of ultraviolet (UV) radiation is known to cause degradation of a wide variety of materials, especially polymeric materials.
For example, polymeric materials such as plastics often discolor, lose gloss and / or become brittle as a result of prolonged exposure to UV light due primarily to a reduction in the molecular weight of the polymer.

Method used

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  • UV stabilizing additive composition
  • UV stabilizing additive composition
  • UV stabilizing additive composition

Examples

Experimental program
Comparison scheme
Effect test

examples 1 to 3

Gloss Retention, Delta E, Delta YI and Breaking Strength in a Polypropylene Homopolymer Composition

The UV additives of Examples 1 to 3 were mixed by using a dry blending technique. In addition to the additives, an antioxidant package containing 0.05% by weight Cyanox® 1741 (1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-s-triazine-2,4,6(1H,3H,5H)trione) from Cytec Industries Inc, 0.05% by weight Doverphos® 9228 (bis(2,4-dicumylphenyl) pentaerythritol diphosphite) from Dover Chemical Corporation and 0.05% by weight calcium stearate were also mixed with the UV additives. These additives were compounded with a polypropylene homopolymer from Basell (PH350) and extruded using conventional single-screw extrusion parameters. After extrusion, standard 2×2×0.125 inch plaques were injection molded using an Arburg injection molder.

The performance criteria of Gloss retention, Delta E, Delta YI and Breaking Strength were measured at set exposure intervals (2000 and 3125 hours) using accelera...

examples 4 to 8

Gloss Retention and Delta E in a Pigmented TPO Composition

The UV additives of Examples 4 to 8 were mixed by using a dry blending technique. In addition to the additives, an antioxidant package containing 0.05% by weight Cyanox® 1741 (1,3,5-tris-(3,5-di-tert-butyl-4-hydroxybenzyl)-s-triazine-2,4,6(1H,3H,5H)trione) from Cytec Industries Inc. 0.05% by weight Doverphos® 9228 (bis(2,4-dicumylphenyl) pentaerythritol diphosphite) from Dover Chemical Corporation and 0.05% by weight calcium stearate were also mixed with the UV additives. These additives were compounded with reactor grade TPO polymer from Equistar (MF 1.3, Flex Modulus 25,200 psi) and a gray pigment using a 4% let down ratio via conventional single-screw extrusion parameters. After extrusion, standard 2×2×0.125 inch plaques were injection molded using an Arburg injection molder. The total amount of UV stabilizer package for each sample was approximately 0.2 wt %, based on the total weight of the sample.

The performance cri...

examples 9 to 11

Percent Gloss Retention and Delta E Chance in a Non-Pigmented TPO System.

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Abstract

This invention relates to an UV stabilizing additive composition comprising an ortho-hydroxy triazine compound, a hindered hydroxybenzoate compound and optionally a hindered amine compound. This additive composition may be used to stabilize materials from UV radiation. This invention also contemplates a method of stabilizing a material by contacting the material with the UV stabilizing additive composition.

Description

FIELD OF THE INVENTION This invention relates to an improved UV stabilizing additive composition. More specifically, this invention relates to an UV stabilizing additive composition comprising an ortho-hydroxy triazine compound, a hindered hydroxybenzoate compound and optionally a hindered amine compound. BACKGROUND OF THE INVENTION Exposure to sunlight and other sources of ultraviolet (UV) radiation is known to cause degradation of a wide variety of materials, especially polymeric materials. For example, polymeric materials such as plastics often discolor, lose gloss and / or become brittle as a result of prolonged exposure to UV light due primarily to a reduction in the molecular weight of the polymer. Accordingly, a large body of art has been developed directed towards materials such as UV light absorbers and stabilizers, which are capable of inhibiting such degradation in polymeric articles. U.S. Pat. No. 4,670,491 discloses the use of a C12 to C20 alkyl esters of 3,5-tertbutyl...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K5/101C08K5/134C08L101/00C08K5/34C08K5/3432C08K5/3462C08K5/3492C08L23/12C08L23/16
CPCC08K5/1345C08K5/34C08K5/3492C08L23/12C08L23/16C08L2666/06C08L23/02C08K5/3435
Inventor STRETANSKI, JOSEPH A.SANDERS, BRENT M.
Owner STRETANSKI JOSEPH A
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