Supercharge Your Innovation With Domain-Expert AI Agents!

polyacrylate allophanate

A technology of allophanate and acrylate, applied in polyurea/polyurethane coatings, synthetic resin layered products, organic chemistry, etc., can solve problems such as over-sticking

Active Publication Date: 2019-01-08
VENCOREX FRANCE
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because prior art isocyanate-acrylates containing a large number of urethane functional groups are often too viscous to be used in an effective manner

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
  • polyacrylate allophanate
  • polyacrylate allophanate
  • polyacrylate allophanate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0117] Embodiment 1: the preparation of the allophanate of formula (I)

[0118] In a fully stirred jacketed reactor introduce:

[0119] 425 g of HDI (2.53 mol), followed by 82 g of ethoxylated C 12 -C 18 Alcohol (0.23 mol) + 1.45 g of 1-butanol / 2-butanol mixture (75 / 25 in mass ratio m / m) and 5.85 g of catalyst KKAT XK-629 (at ambient temperature). The medium is heated to reach a temperature of 110° C. within 2 hours. The reaction medium is maintained at this temperature for about 1.5 hours.

[0120] The NCO content of the reaction medium was measured regularly by means of dibutylamine return dosing.

[0121] When the NCO content of the reaction medium corresponds to the desired theoretical content, the reaction is stopped by adding 0.066 g of p-toluenesulfonic acid.

[0122] After 15 minutes, the temperature of the reaction medium returned to ambient temperature.

[0123] The NCO content of the final reaction medium is 0.829 mol of NCO for 100 g.

[0124] Two successi...

Embodiment 2

[0129] Embodiment 2: Preparation according to the modified allophanate of the present invention

[0130] 80 g (0.205 mol) of (pentaerythritol) triacrylate (PETIA), 0.02 g of dibutyltin dilaurate (DBTL), 0.072 g of butyltin were introduced into a three-necked flask equipped with a cooling system, a mechanical stirrer and a nitrogen inlet. hydroxytoluene (BHT) and 100 g of dry toluene.

[0131] Then 61.4 g (0.185 mol) of the allophanate of the formula (I) of Example 1 were added dropwise with stirring, and the reaction medium was then heated to a temperature of 60°C.

[0132] The reaction was stopped after 7 hours when the NCO groups had reacted completely, and the reaction medium was returned to ambient temperature.

[0133] The solvent was then evaporated in vacuo.

Embodiment 6-8

[0142] Embodiment 6-8: by the product production coating of embodiment 2,3,4

[0143] The products of Examples 2, 3 and 4 were used to produce coatings which were crosslinkable under UV under the conditions shown in Table 3.

[0144] The urethane acrylate based formulation was adjusted to 50% dry extract with acetone and then 4% photoinitiator (Irgacure 500) was added.

[0145] 12 μm were applied on polycarbonate panels using a K-rod. After evaporating the solvent (30 minutes at 60° C. in an oven), the plates were kept under constant temperature and humidity conditions (50% RH, 23° C.) for 24 hours. The thickness of the coating is then 6 μm.

[0146] The plates were then crosslinked under UV (mercury lamp) under the conditions indicated in Table 3.

[0147] table 3

[0148]

[0149] Evaluation of the following properties was carried out 24 hours after crosslinking.

[0150] Gloss

[0151] Gloss was measured at an angle of 20° initially and after 50 reciprocations ...

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
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention relates to a modified allophanate compound bearing acrylate functions, resulting from the reaction of a particular allophanate with an ester from the reaction between an acid selected from acrylic acid and methacrylic acid and at least one polyol that does not contain an oxylakylene or aa (poly)oxyalkylene group. The invention further relates to the use of said modified allophanate for preparing a hydrophobic cross-linkable coating composition by means of UV radiation.

Description

technical field [0001] The present invention relates to modified allophanate compounds bearing acrylate functionality, which result from the reaction of specific allophanate esters with esters composed of acids selected from acrylic and methacrylic acids with at least one The reaction between alcohols containing oxyalkylene or (poly)oxyalkylene groups results. [0002] The present invention also relates to the use of such modified allophanates for the preparation of hydrophobic coating compositions which are crosslinkable, in particular by UV radiation. Background technique [0003] Allophanates intended for use in coating compositions are known. WO-2010 / 067005 describes a process for the preparation of allophanates and allophanates as well as compositions comprising the allophanates, which are intended for the preparation of coating compositions, especially paint compositions . [0004] Crosslinkable polyurethane acrylates are known from US Pat. No. 6,753,394 and are pre...

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 Patents(China)
IPC IPC(8): C07C275/60C08G18/42C08G18/48C08G18/78C09D175/16B32B27/40
CPCC07C275/60C08F290/067C08G18/672C08G18/7837C09D4/00
Inventor P·奥利尔
Owner VENCOREX FRANCE
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com