Hybrid silane-crosslinking polymers: a potential alternative to polyurethane wood adhesives? A preliminary investigation by TMA

Zanetti, Michela; Marini, Diletta; Pasqualini, E.; Masetto, E.; Cavalli, Raffaele

doi:10.1007/s00107-015-0988-8

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…This is due to the reaction between reactive isocyanate groups (NCO) on the end of PU chains and water in the air 29 . Therefore, a feasible method to avoid this problem is modifying PU by alkoxysilane which can react with the NCO groups to obtain silane‐terminated polyurethane (STPU) chains 30,31 . When end‐capped by silane groups, the solidification of the STPU is moisture‐curable in the air undergoing the processes of hydrolyzation and condensation reaction without releasing CO 2.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and performance of moisture curable solvent free silane terminated polyurethanes for coating and sealant applications

Camadanli

Hisir

Dural

2021

J of Applied Polymer Sci

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Polyurethanes (PUs) constitute one of the most versatile class of polymers with respect to composition, properties, and applications. Having an excellent elastomeric performance, PUs has been used in a wide range of applications. Additionally, silane terminated modified polyurethanes (STPUs) combine advantageous characteristics of PUs and organosilicon. Two PUs and four STPUs modified by a silane end‐capper N‐ethyl‐3‐trimethoxysilyl‐2‐methylpropanamine and N‐cyclohexyl aminomethyltriethoxysilane were synthesized and acted as an adhesives or coatings which could be suitable for use in moisture‐curing compositions at room temperature without releasing CO2. The effect of isocyanate groups in the polyurethane backbone and organofunctional groups in the aminosilane structure (R1–NH–R2–Si[OC2H5]3), R1 (alkyl or aryl), the spacer R2 (α or γ) was examined. The chemical and physical structures of the PUs and STPUs were investigated by nuclear magnetic resonance (13C and 1H), dynamical mechanical analysis (DMA), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FT‐IR) and the mechanical properties were evaluated by universal tensile tests. The results showed that STPUs were successfully synthesized as moisture curable, exhibiting low viscosity with adequate tensile strength and elongation can be prepared environmentally benign by utilizing secondary aminosilane end‐cappers and an optimal combination of the polyol molecular weight and NCO/OH ratio.

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Section: Introductionmentioning

confidence: 99%

Synthesis and performance of moisture curable solvent free silane terminated polyurethanes for coating and sealant applications

Camadanli

Hisir

Dural

2021

J of Applied Polymer Sci

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“…[6] Hence, a practical way of avoiding this issue is to modify the polyurethane through the reaction with silane to generate silane-modified polyurethane (SPU) chains that attach to the NCO groups. [7,8] The resulting silanized polyurethane (SPU) obtained by the functional modification of PU with silane offers the dual benefits of silicone and polyurethane. The modified PU does not release CO 2 gas when it cures with moisture from the air, overcoming the inherent deficiencies of PU such as inadequate weathering performance, resulting in an outstanding performance similar to that of silicone.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of hydroxyl silane coupling agent and its application in preparation of silane‐modified polyurethane

Guo

Shangguan

Liu

et al. 2023

Polymer Engineering & Sci

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This study describes the synthesis of a hydroxyl silane coupling agent (HO‐silane) through a click reaction between SH in 3‐(trimethoxysilyl)propane‐1‐thiol (KH‐590) and CC in 2‐hydroxyethyl methacrylate (HEMA). This coupling agent was subsequently employed in the synthesis of silane‐modified polyurethane (SPU) resin which could be moisture‐cured at room temperature. The influence of r values (the molar ratio of NCO and OH) on the characteristics of SPU resins was investigated. These results reveal that an increase in the r value leads to a reduction in viscosity from 4.9 × 105 to 1.9 × 105 mPa·s, a rise in tensile strength from 0.88 to 0.98 Mpa followed by a decline to 0.69 MPa, and a reduction in extension at fracture from 236% to 94%. A SPU resin with a viscosity of approximately 3.6 × 105 mPa·s, tensile strength of 0.98 MPa, and elongation at break of 218% can be produced when the r value is 1.8. In addition, a silane‐modified polyurethane (MS) sealant with a tensile strength of 1.6 MPa in addition to elongation at break at 336% could be produced using the aforementioned SPU resin.

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Influence of Silicon‐Containing Compounds on Adhesives for and Adhesion to Wood and Lignocellulosic Materials: A Critical Review

Petrič

2019

Progress in Adhesion and Adhesives

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Hybrid silane-crosslinking polymers: a potential alternative to polyurethane wood adhesives? A preliminary investigation by TMA

Cited by 6 publications

References 7 publications

Synthesis and performance of moisture curable solvent free silane terminated polyurethanes for coating and sealant applications

Synthesis and performance of moisture curable solvent free silane terminated polyurethanes for coating and sealant applications

Synthesis of hydroxyl silane coupling agent and its application in preparation of silane‐modified polyurethane

Influence of Silicon‐Containing Compounds on Adhesives for and Adhesion to Wood and Lignocellulosic Materials: A Critical Review

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