Silane Crosslinkers with Alpha-Hydroxycarboxylic Acid Amide Groups

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Solution Overview

Problem

Current neutral crosslinkers for silicone-based curable compositions, such as oximosilane crosslinkers, face issues with storage stability and adhesion to certain materials, and are associated with unpleasant odors and potential health risks, necessitating the development of alternative neutral crosslinkers that do not compromise storage stability.

Innovation Solution

Silane compounds containing at least one α-hydroxycarboxylic acid amide group are used as neutral crosslinkers in curable compositions, providing improved storage stability and adhesion properties without releasing aggressive compounds during crosslinking.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If oximosilane crosslinkers are used in silicone-based curable compositions, then crosslinking function is achieved, but storage stability deteriorates and adhesion to certain materials is poor

Engineering Contradiction:

Improvestorage stabilityVSAvoidunpleasant odor and potential health risks

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical parameters of the crosslinker by using α-hydroxycarboxylic acid amide groups instead of oxime groups. This parameter change results in the release of non-toxic, odor-free decomposition products while maintaining crosslinking functionality and improving storage stability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent converts the harmful aspects of traditional crosslinkers (unpleasant odor, potential carcinogenicity) into beneficial properties by selecting a crosslinker that decomposes into harmless substances, thereby eliminating the harmful effects while preserving the crosslinking function.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Object-affected harmful factors

If neutral crosslinkers are used to avoid aggressive compounds, then corrosion and odor are reduced, but storage stability and adhesion are compromised

Engineering Contradiction:

Improvecorrosion and odorVSAvoidstorage stability

Core Design Contradiction:

Object-affected harmful factorsVSReliability

Solution Approach 1:

The patent modifies the chemical structure parameters of neutral crosslinkers by introducing α-hydroxycarboxylic acid amide groups, which change the decomposition behavior to produce non-corrosive, odor-free products while simultaneously improving storage stability and adhesion properties.

Inventive Principle:

Principle #35Parameter changes

3Productivity

If conventional crosslinkers are used for curable compositions, then crosslinking function is achieved, but aggressive compounds are released during crosslinking

Engineering Contradiction:

Improvecrosslinking functionVSAvoidaggressive compounds

Core Design Contradiction:

ProductivityVSObject-generated harmful factors

Solution Approach 1:

The patent converts the harmful decomposition products of conventional crosslinkers into beneficial non-toxic, odor-free substances by using α-hydroxycarboxylic acid amide groups, thereby maintaining crosslinking productivity while eliminating harmful emissions.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The silane compounds with α-hydroxycarboxylic acid amide groups enhance the storage stability and adhesion of silicone-based compositions, eliminating the drawbacks of existing neutral crosslinkers while ensuring safe and odor-free processing.

Implementation Method 1

Silane compounds that release α-hydroxycarboxylic acid esters or α-hydroxycarboxylic acid amides during crosslinking

Methodology Applied

Scientific EffectHydrolysis: Hydrolysis

Data Source

PatentUS10487096B2Silanes and curable compositions containing said silanes as crosslinkers

Publication Date: 2019.11.26 NITROCHEM ASCHAU

AI summary

The invention relates to a silane of the formula (1),Si(R1)m(R2)n(R3)4−(m+n) (1)as defined herein, where the silane has at least one group of the general formula (3):as defined herein, to a method for preparing the silane, and to curable compositions, containing the silane and at least one polyorganosiloxane.