Anaerobically curable (meth)acrylate compositions
A methacrylate-functional, acrylate-based technology for use in anaerobically curable compositions
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Embodiment 1
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[0160] The methacrylate-functionalized polybutadiene used in Example 1 was a methacrylate (vinyl) terminated butadiene (VTB) polymer with a number average molecular weight of about 4,450. Such VTB polymers are available under the trade name Hypro TM 2000X168LC from Emerald Performance purchased.
[0161]Suitable styrene-butadiene block copolymers are available under the trade names D1155E polymer was purchased from Kraton Performance Polymers. D1155E is a transparent linear block copolymer based on styrene and butadiene with 40% by mass of bound styrene.
[0162] A suitable source of propoxylated bisphenol A fumarate polyester is FILCO 663P, other sources include those commercially available under the tradenames ATLAC 382 and DION 382E.
[0163] Figures 1 to 6 The tensile strength of various compositions observed on various substrates is shown. Substrates shown are abbreviated as follows: Perspex (polymethyl methacrylate; "PX"); mild steel ("MS"); stainle...
Embodiment 2
[0165] Example 2 (comparative): The tensile strength properties of methyl methacrylate (MMA) compositions comprising different levels of styrene-butadiene block copolymer on lap shear substrates were evaluated. Compositions comprising 10% and 20% by weight styrene-butadiene block copolymer were prepared as follows.
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[0167] figure 2 The tensile strength performance of Composition A versus Compositions C and D on various passive substrates is shown. Although the addition of styrene-butadiene block copolymers improved the tensile strength properties on several substrates, the styrene-butadiene block copolymers and methacrylate-functionalized polybutadiene The combination results in improved tensile strength properties.
Embodiment 3
[0168] Example 3 (comparative): The tensile strength properties of MMA compositions comprising different levels of methacrylate functionalized polybutadiene on lap shear substrates were evaluated. Compositions comprising 10% and 20% by weight methacrylate functionalized polybutadiene were prepared as follows.
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[0170] image 3 The tensile strength performance of Composition A relative to Compositions E and F on various passive substrates is shown. While the incorporation of methacrylate-functionalized polybutadiene improved tensile strength properties on several substrates, styrene-butadiene block copolymers and methacrylate-functionalized polybutadiene The combination results in enhanced tensile strength properties for certain substrates.
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Abstract
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