Acrylic Elastomer Laminate Adhesion via Iodine Crosslinking
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Solution Overview
Problem
Existing methods for laminating fluorine-based elastomers with acrylic elastomers face challenges in achieving strong interlayer adhesiveness without increasing production costs or compromising sealing properties, and are limited in design flexibility due to complex surface treatments or restricted fluorine elastomer types.
Innovation Solution
An acrylic elastomer composition containing iodine groups as crosslinking agents, combined with organic peroxides and onium salts, is used to form a laminate with improved adhesiveness to fluorine-based elastomers, allowing for enhanced interlayer bonding without complex surface treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If surface treatments (metal sodium solution, discharge treatment, plasma treatment) are applied to fluorine-based elastomer, then interlayer adhesiveness is improved, but production process becomes complicated and production cost increases
Solution Approach 1:
The invention extracts the adhesion-promoting function from complex surface treatment processes and concentrates it into a simple iodine compound additive. Instead of applying elaborate surface treatments to the fluorine-based elastomer, the solution introduces iodine groups through a straightforward compounding process, eliminating the need for metal sodium solution, discharge treatment, or plasma treatment while achieving equivalent or superior adhesion results.
Solution Approach 2:
The invention changes the chemical parameter of the fluorine-based elastomer by introducing iodine groups through simple compounding. This parameter change (adding iodine content of 0.1-2 mass%) fundamentally alters the adhesion characteristics without requiring complex process changes, thereby improving interlayer adhesiveness while keeping the production process simple.
2Strength
If surface treatments are applied to fluorine-based elastomer, then interlayer adhesiveness is improved, but production cost increases
Solution Approach 1:
The invention extracts the adhesion-promoting function from expensive surface treatment processes and implements it through economical iodine compound additives. This approach eliminates the need for costly metal sodium solutions, discharge equipment, or plasma treatment systems, achieving the same adhesion improvement at a fraction of the production cost.
Solution Approach 2:
The invention uses inexpensive iodine compounds as additives that can be easily incorporated into the fluorine-based elastomer during compounding. These iodine-containing additives provide the necessary adhesion promotion without requiring expensive equipment or complex processes, making the solution economically viable for mass production.
3Reliability
If fluorine-based elastomer is used to improve heat oxidizing resistance and acid resistance, then durability is improved, but low-temperature resistance deteriorates and cost increases
Solution Approach 1:
The invention creates a composite laminate structure combining fluorine-based elastomer (providing heat oxidizing resistance and acid resistance) with acrylic elastomer (providing low-temperature resistance). The fluorine-based elastomer layer maintains its superior durability properties while the acrylic elastomer layer compensates for the low-temperature performance deficiency, achieving a balanced overall performance that neither material could provide alone.
4Reliability
If fluorine-based elastomer is used to improve durability and acid resistance, then reliability is improved, but cost increases
Solution Approach 1:
The invention creates a composite laminate where the fluorine-based elastomer layer (providing superior durability and acid resistance) is combined with the acrylic elastomer layer (providing cost-effectiveness). This composite approach allows the expensive fluorine-based elastomer to be used only where its superior properties are most needed, while the more economical acrylic elastomer handles other requirements, thereby achieving high reliability at a moderate overall cost.
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 approach results in a laminate with superior interlayer adhesiveness, enabling the production of durable, cost-effective molded articles such as hose and seal components with improved low-temperature resistance and heat oxidizing resistance.
Implementation Method 1
contains iodine groups as crosslinking groups and the iodine content is 0.1 to 2 mass % with respect to the total mass of the elastomer
Implementation Method 2
The acrylic elastomer composition according to the present invention contains 100 parts by mass of the acrylic elastomer described above, additionally 1 to 7 parts by mass of an organic peroxide, and 1 to 5 parts by mass of an onium salt
Data Source
Figure 1
AI summary
Provided are an acrylic elastomer superior in adhesiveness to a fluorine-based elastomer, an acrylic elastomer composition containing the same, its laminate, and its crosslinked product and a molded article therefrom. Iodine groups are introduced as crosslinking groups into an acrylic elastomer to an iodine content of 0.1 to 2 mass % with respect to the total mass of the elastomer. In addition, 1 to 7 parts by mass of an organic peroxide and 1 to 5 parts by mass of an onium salt were blended with 100 parts by mass of the acrylic elastomer, to give an acrylic elastomer composition. Further, an acrylic elastomer layer of the acrylic elastomer composition is laminated with a fluorine-based elastomer layer of a fluorine-based elastomer composition mainly containing of a fluorine-based elastomer having iodine groups as crosslinking groups, to give a laminate. The laminate is then crosslinked to give a crosslinked product and a molded article.