Composition crosslinkable by real michael addition (RMA) reaction

A cross-linking composition and composition technology, applied in the direction of coatings, polyester coatings, etc., can solve the problems of inapplicability of highly colored systems, inapplicability, etc.

Active Publication Date: 2016-02-10
欧尼克斯荷兰有限公司
View PDF10 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above photogenic amine catalysts that do produce a strong base under UV irradiation are not suitable for coating more complex irregular substrates where parts of the surface cannot be reached by UV or visible light or for highly pigmented systems

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
  • Composition crosslinkable by real michael addition (RMA) reaction
  • Composition crosslinkable by real michael addition (RMA) reaction
  • Composition crosslinkable by real michael addition (RMA) reaction

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0093] Preparation of malonate polyester A

[0094] Into a reactor equipped with a distillation column packed with Raschig rings, 17.31 mol of neopentyl glycol, 8.03 mol of hexahydrophthalic anhydride and 0.0047 mol of butylstannoic acid were introduced. The mixture was polymerized at 240°C in nitrogen to an acid value of 0.2 mgKOH / g. The mixture was cooled to 130° C. and 10.44 mol of diethyl malonate were added. The reaction mixture was heated to 170 °C and ethanol was removed under reduced pressure. The almost colorless material was cooled and diluted to 90% solids with 420 g butyl acetate. The final resin had an acid value of 0.3 mgKOH / g solid, an OH value of 20 mgKOH / g solid, and a weight average molecular weight of 3400 Da.

[0095] Preparation of alkaline solution C

[0096] A certain amount of acid (X-H) according to Table A was dissolved in a solution of a strong base in an alcoholic solvent (amounts in grams; all strong base / acid molar ratios equal 1). The sol...

Embodiment 18

[0125] Example 18. Determination of Michael Addition Reactivity of Succinimide

[0126] Dissolve 5 g (50.5 mmol) of succinimide in a mixture of 42 g of butyl acrylate and 42 g of methanol and either as such, or after adding a strong base (9.82 g of 1.12 meq / g tetrabutylammonium hydroxide in methanol solution, 11meq) and kept at room temperature. Subsequently, the concentration of succinimide was determined as a function of time by taking a sample, neutralizing it with a known excess of HCl in water, and back titrating it with KOH solution. Without base initiation, no appreciable loss of succinimide N-H was observed in solution over two weeks. With the addition of base, it can be seen that the concentration of succinimide decreases over time, as shown in Table F below. The succinimide concentration is expressed as % relative to the theoretical level based on the amount used.

[0127] Form F

[0128] time (minutes)

Succinimide residue (%)

3

99

...

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
boiling pointaaaaaaaaaa
Login to view more

Abstract

The present invention relates to a crosslinkable composition crosslinkable by Real Michael Addition (RMA) reaction comprising a component with at least 2 activated unsaturated groups (hereafter referred to as the RMA acceptor groups) and a component with at least 2 acidic protons C-H in activated methylene or methine groups (hereafter referred to as the RMA donor groups) which components can react to form a crosslinked network. The composition comprises: f. Component(s) A having at least 2 acidic C-H donor groups in activated methylene or methine and having a pKa(A) between 10.5 and 14; g. Component(s) B having at least 2 activated unsaturated acceptor groups, wherein a molar ratio R of acceptor groups to donor groups is between 3:1 to 1:6 and which component(s) B react with component(s) A by Real Michael Addition (RMA) to form a crosslinked network; h. basic component(s) C being a salt of a basic anion X- from an acidic X-H group containing compound wherein X is N, P, O, S or C: iv. in an amount xc between 0.001 and 1 meq/(gr of components A, B, C, D), v. anion X- being a Michael Addition donor reactable with component B and vi. anion X- is characterized by a pKa(C) of the corresponding acid X-H of more than two units lower than the pKa(A) of the majority component A and being lower than 10.5; i. optional component(s) D comprising one or more acidic X'-H groups wherein X' is N, P, O, S or C: v. X' being a same or different group as group X in component C, vi. the X'- anion being a Michael Addition donor reactable with component B, vii. the pKa(D) of the X'-H group in component D being more than two units lower than pKa(A) of the majority component A and being lower than 10.5, viii. the equivalent ratio Rd/c of acidic X'-H groups in component D over basic anion X- in component C is between 1% and 5000%.

Description

technical field [0001] The present invention relates to a crosslinkable composition crosslinkable by a true Michael addition (RMA) reaction, comprising a component having at least 2 reactive unsaturated groups (hereinafter referred to as RMA acceptor groups) And a component having at least 2 acidic protons C—H (hereinafter referred to as RMA donor groups) in a reactive methylene or methine group, the two components are capable of reacting to form a crosslinked network. Background technique [0002] In compositions with acceptable or good pot life, the RMA chemistry can also be tuned to give fast curing compositions at lower cure temperatures for good material properties, which makes the chemistry in Very attractive as a basis for use in crosslinkable compositions. Details of RMA crosslinkable compositions using latent basic crosslinkable catalysts are described in WO2011 / 124663. [0003] True Michael addition is activated by strong bases, but can also be inhibited by the p...

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): C08K5/16
CPCC08J3/24C08J2367/00C08G63/181C08K3/013C08G63/916C09D167/02C08G63/91
Inventor R·H·G·布林克胡伊斯F·L·蒂斯E·A·C·A·德沃尔夫
Owner 欧尼克斯荷兰有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap