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Silicone compositions containing acrylate cure accelerator

A curing accelerator, acrylate technology, used in non-polymer organic compound adhesives, adhesives, film/sheet adhesives, etc., can solve the problems of high cost, slow curing rate, insufficient curing, etc.

Pending Publication Date: 2022-02-11
MORGAN ADHESIVES COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high costs associated with the use of platinum catalysts have prompted the adhesives industry to investigate affordable alternatives
There has been little success in reducing the amount of platinum catalyst required to successfully cure silicone-containing compositions, at least because reducing the amount of platinum catalyst can lead to insufficient cure and / or slower cure rates

Method used

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  • Silicone compositions containing acrylate cure accelerator
  • Silicone compositions containing acrylate cure accelerator
  • Silicone compositions containing acrylate cure accelerator

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0057] Preparation of the composition

[0058] The following are exemplary methods of preparing the compositions. The silicone-based polymer, crosslinker, catalyst, and optionally release control agent are added together, and the components are mixed together, eg, for about 5 to about 25 minutes or until completely mixed, to prepare a mixture. The acrylate cure accelerator and optionally the O-vinyl ether compound are added to the mixture and further mixed (eg, for about 5 to about 25 minutes) to form a reactive mixture. In one or more embodiments, the step of adding an acrylate cure accelerator and optionally an O-vinyl ether compound to the components of the mixture in the method of making a curable (e.g., thermally curable) composition is at This is done immediately before applying curing conditions, such as heating the composition.

[0059] In one or more embodiments, the silicone-based polymer and crosslinker can be combined together and mixed until a homogeneous blen...

Embodiment

[0080] In order to demonstrate the effect of specific additives on the compositions, cure studies were performed with the compositions prepared according to Table 2.

[0081] Table 2

[0082]

[0083] For the silicone-based polymer, Dehesive 915 (DEH 915), a silicone-based polymer that is a short-chain, linear, bifunctional, vinyl-terminated silicone polymer supplied by Wacker Chemicals, was used. A silicone release modifier resin (eg, release control agent) CRA 17 was added to demonstrate compatibility between the tested additives and the other components in the release coating composition. V90 (silicone crosslinker supplied by Wacker Chemical) and 20 ppm HSPC (20 ppm platinum atomic mass) (platinum catalyst diluted in silicone polymer) were also added to the silicone based composition.

[0084] 1 pph of each additive listed in Table 3 below, including acrylate cure accelerator and O-vinyl compound, was added to the combination mixture identified in Table 2 to form a reac...

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Abstract

Compositions are disclosed which include between about 0.05 to about 5 or less wt. % of at least one acrylate monomer based on the total weight of the composition. The acrylate monomer reduces the peak cure temperature, thereby accelerating the rate of cure, without sacrificing completeness of the cure or the release performance of the cured product. The addition of the acrylate monomer also enables a reduction in the amount of costly platinum catalyst required to effectively cure a composition. In addition to the acrylate monomer, the compositions also include a silicone base polymer, a crosslinking agent, and platinum catalyst. The cured compositions exhibit properties useful for incorporation into release liners, adhesive articles, medical products and gaskets.

Description

technical field [0001] The present disclosure relates to the curing of compositions comprising silicone base polymers and an acrylate cure accelerator which may be present in about 5 wt % or less, based on the total weight of the composition. Acrylate cure accelerators (e.g., acrylate monomers) beneficially reduce the peak cure temperature of the composition, thereby increasing the rate and time of cure, and further reducing the amount of catalyst required to initiate effective cure, e.g., by 90% or more . The present disclosure also relates to the addition of more than one O-vinyl compound to silicone-containing compositions useful in adhesive liners and release products such that the acrylate cure accelerator and the O-vinyl compound The amount of catalyst needed to act synergistically to promote and enhance completeness of cure, lower peak cure temperature, and initiate effective cure. The composition can be used as a material having desired mold release properties, for e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09J7/40
CPCC09D183/04C08F283/124C09J183/04C08F220/1811C08F226/10C08F216/125C08G77/20C08G77/12C08L83/04C09J7/401C09J2483/005C09J4/06C08F283/12C08K5/56C08L83/00C08K5/5425C08K5/06C08F226/06C08F222/102C08F230/08C08F220/281C08K5/0025C09J7/38C08K5/101C08G77/08C08L2203/16C08G2170/40C08L2314/08C08F20/06
Inventor T·M·史密斯J·D·戈尔奇察G·A·麦克马斯特S·默勒
Owner MORGAN ADHESIVES COMPANY
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