Unlock instant, AI-driven research and patent intelligence for your innovation.

Wideband ultraviolet absorber for polyolefin and preparation method thereof

An absorber and ultraviolet light technology, applied in the field of polymers, can solve the problems of incomplete coverage of the ultraviolet light region, limited absorption frequency band and intensity, etc., and achieve obvious photostability, improved photostability, and increased absorption intensity and width Effect

Active Publication Date: 2010-09-01
SICHUAN UNIV
View PDF8 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention proposes a polyolefin ultraviolet light absorber and its preparation method aimed at the deficiencies of the prior art, in order to solve the problem that the existing ultraviolet light absorber has limited absorption frequency band and intensity in the ultraviolet light region and cannot completely cover the ultraviolet light region The problem

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Wideband ultraviolet absorber for polyolefin and preparation method thereof
  • Wideband ultraviolet absorber for polyolefin and preparation method thereof
  • Wideband ultraviolet absorber for polyolefin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Heat and melt 0.25phr o-hydroxyphenyl salicylate until all the white crystals turn into a viscous liquid, then add 0.75phr triazine 5 into the viscous liquid, stir and react at 180°C for about 4h, until two The ultraviolet light absorber is completely melted into one phase, and after cooling, it is ground to obtain the broadband ultraviolet light absorber I.

Embodiment 2

[0031] Preheat and melt 0.5phr p-octylphenyl salicylate until all the white crystals turn into viscous liquid, then add 0.5phr2-(2-hydroxy-3,5-dicumylphenyl)-benzo Add the triazole into the viscous liquid, stir and react at 160°C for about 3 hours, until the two types of UV absorbers are completely melted into one phase, and then grind after cooling to obtain the broadband UV absorber II.

Embodiment 3

[0033] Preheat and melt 0.4phr p-tert-butylphenyl salicylate until all the white crystals turn into viscous liquids, then add 0.6phr2-(2-hydroxyl-3-tert-butyl-5-methylphenyl )-5-Chlorobenzotriazole was added to the viscous liquid, stirred and reacted at 170°C for about 5 hours, until the two types of UV absorbers were completely melted into one phase, and then ground after cooling to obtain broadband UV Absorbent III.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a novel ultraviolet absorber having excellent absorption effect in wider ultraviolet band range (from 200nm to 420nm) and a preparation method thereof. The novel ultraviolet absorber mainly comprises the ingredients of: phenyl salicylates and derivatives thereof, and triazine or ortho-hydroxyazimidobenzene compounds. The preparation method of the novel ultraviolet absorber comprises the steps: adding and pre-fusing phenyl salicylates and derivatives thereof until white crystals are completely changed into viscous liquid, then adding azimidobenzene or triazine, sufficiently stirring and reacting at the temperature from 150 to 180 DEG C until two phases are completely fused to one phase, and preparing the wideband ultraviolet absorber by cooling and grinding. The wideband ultraviolet absorber according to the invention can be extensively applied to the light protection of polyolefin articles which are liable to photooxidative degradation, such as PVC, PS, PP and the like. Long-term retaining rate of the comprehensive property of the polyolefin articles containing the ultraviolet absorber during outdoor use is greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to an ultraviolet absorber for polyolefin and a preparation method thereof. technical background [0002] Common UV absorbers for polyolefins, such as benzophenones, triazines, and benzotriazoles, all have a common feature, that is, they have intramolecular hydrogen bonds. The existence of this structure allows the compound to convert electronic excitation energy into vibrational energy (S 1 ~~~~~→S 0 ), so as to achieve the protection of the matrix material. [0003] Due to their different molecular structures, different types of ultraviolet light absorbers have specific and limited absorption bands and absorption capabilities for ultraviolet light, which leads to insufficient ultraviolet protection ability of a single ultraviolet light absorber for materials. For example: the commonly used 2-hydroxy-4-n-octyloxybenzophenone (UV531) has a narrow absorption width and only has go...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08K5/00C08K5/134C08K5/3475C08K5/3492
Inventor 郭少云皮红付勰张晓飞
Owner SICHUAN UNIV