Latent reactive polyurethanes based on toluenediisocyanate-uretdione and polycaprolactones

Harling, Steffen; Meola, G.; Schaible, Stefan; Schulthess, Adrian; Braendli, C.; Meincke, Olaf

doi:10.1016/j.ijadhadh.2013.05.012

Cited by 2 publications

(2 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…30 Compared with those with T g transitions, resins/prepolymers with crystalline structures have a distinct transition from a crystalline to an amorphous structure and thus have better latency and quick transition. 31 However, until now, to our knowledge, there are few studies on using crystalline catalytic copolymers with a catalytic unit built into the main chains as latent catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Besides the above encapsulation blocking methods, catalysts blocked by resins with thermal transitions like T g or T m at suitable temperature ranges have also been well studied for thermosetting resins . Compared with those with T g transitions, resins/prepolymers with crystalline structures have a distinct transition from a crystalline to an amorphous structure and thus have better latency and quick transition . However, until now, to our knowledge, there are few studies on using crystalline catalytic copolymers with a catalytic unit built into the main chains as latent catalysts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Tin-Containing Crystalline Copolymers as Latent Catalysts for Polyurethanes

Gao

Dong

Liu

et al. 2020

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

For many applications, polyurethanes (PUs) need to have a fast curing speed and long pot life. Latent catalysts are seen to be one of the approaches that can fulfill this need. In this article, we have synthesized a series of copolymers with n-alkyl acrylates and a reactive tin catalyst, dibutyltin maleate, by conventional free radical polymerization using azodiisobutyronitrile (AIBN) as an initiator and dodecanethiol as a chain transfer agent. The copolymers with crystalline side chains were characterized by gel permeation chromatography (GPC), 1 H NMR, 13 C NMR, differential scanning calorimetry (DSC), and ion chromatography. The tin-containing copolymers showed high crystallinity. The melting temperature of the copolymers decreases slightly with the decrease of molecular weight (M w ), while the crystallinity remains almost unchanged. The catalytic performance and latency of the crystalline copolymers with different particle sizes were characterized by rheological measurement and Fourier transform infrared spectroscopy (FTIR). The crystalline copolymers showed quite good latency at 30 °C and high reactivity above the melting point. Both the particle size and the M w of the copolymers had effects on the latency of crystalline catalysts. The PU adhesive with copolymers showed a higher peel strength at the initial stage than the noncatalyzed one and comparable final properties as compared with the samples with dibutyltin dilaurate and dibutyltin maleate.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%