Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Optical articles comprising photochromic poly(urea-urethane)

A urethane, photochromic technology, applied in the field of optical imaging, can solve problems such as difficulties

Active Publication Date: 2019-12-03
YOUNGER MFG
View PDF26 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to have "darker and faster" in the same product, especially if increased return speed is required

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
  • Optical articles comprising photochromic poly(urea-urethane)
  • Optical articles comprising photochromic poly(urea-urethane)
  • Optical articles comprising photochromic poly(urea-urethane)

Examples

Experimental program
Comparison scheme
Effect test

example 2

[0110] figure 2 The advantages of this embodiment of the invention are illustrated by showing a comparative example. In Example C1, a commercially available B-side material contained only amino-reactive species combined with excess isocyanate-reactive groups on the A-side at an effective weight ratio of B to A of 0.95 parts amino:1 part isocyanate. In Example 2, polyether diol is added to modify the B-side active material so that the B-side now includes 0.43 parts by effective weight of hydroxyl species and 0.52 parts by effective weight of amino species (B TOT is 0.95 parts, where B OH 0.43 parts, B NH2 0.52 parts), rather than just 0.95 parts of amino species, reacted with an effective weight ratio of 0.95 parts with 1.0 effective parts by weight excess of isocyanate species on the A-side. Such as figure 2 As shown, Example 2, an ophthalmic lens prepared according to this example of the invention, compared to the addition of the same photochromic dye mixture to the pol...

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

PropertyMeasurementUnit
thicknessaaaaaaaaaa
transmittivityaaaaaaaaaa
Login to View More

Abstract

A process for producing a photochromic eyewear lens. In one embodiment at least a layer of modified photochromic poly(urea-urethane) is formed by combining photochromic material and the reaction product of a polyurethane pre-polymer and a mixture of diethyltoluene diamine and one or more polyols, plus catalyst. The mixture comprises both NH2 and OH reactive groups, with at least 0.04 equivalent weights of OH reactive species available for reaction with each 1.0 equivalent weight of excess NCO reactive species available in the pre-polymer. The lens comprising the modified photochromic poly(urea-urethane) can exhibit faster fade-back rates and better photochromic performance than lenses with non-modified poly(urea-urethane).

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 62 / 465,639, filed March 1, 2017, the entire contents of which are hereby incorporated by reference. [0003] government funded research and development [0004] Not applicable. [0005] joint research and development agreement [0006] Not applicable. [0007] sequence listing [0008] Not applicable. [0009] prior use [0010] Not applicable. technical field [0011] The invention relates to the field of optical imaging, in particular to an optical imaging device for detecting hematoma. Background technique [0012] Glasses are commonly used to correct visual errors, aberrations, and focusing defects caused by age, disease, or other factors. In addition to correcting physiological vision problems, eyeglasses can also be used to improve physical or environmental conditions (eg, glare, variable lighting, high-intensity light, dust, condensation,...

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): G02B1/04G02C7/10B32B27/40
CPCB29D11/00442B29D11/00653B29D11/00865G02C2202/16C08G18/6651C08G18/6685C09D175/04C08G18/44C09K9/02C08G18/10G02C7/102C08K5/1545C08G18/75B29K2995/0018B29D11/00009C09K2211/1018B29K2075/02C08G18/324
Inventor 凯文·M·涅米大卫·马克·安布勒
Owner YOUNGER MFG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com