polyurethane foam
A polymer and isocyanate technology, applied in the field of polyurethane foam, can solve problems such as affecting the stability of the foaming system, deactivation of catalysts, etc., and achieve the effect of avoiding toxicity problems
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Embodiment 1-3
[0110] The formation of embodiment 1-3 PIPA sample (table 1)
[0111] Three samples of PIPA polymer-modified polyols called PIPA1, 2, 3 (Examples 1, 2, 3, respectively) were obtained by making triethanolamine and toluene diisocyanate (TDI), in carrier polyol and metal organic catalyst , wherein the catalyst is DBTL in the case of PIPA1; stannous octoate in the case of PIPA2; and stannous ricinoleate in the case of PIPA3.
[0112] To 1000 g of the polyol in a 1.5 liter open flask was added triethanolamine. Stir the mixture for 15 seconds. TDI was added with further stirring for 15 seconds. The catalyst diluted in the polyol was added by syringe and the mixture was stirred for 10 seconds. The flask was capped and the viscosity was measured after 24 hours and after 72 hours. The resulting polyaddition product forms a stable dispersion in the carrier polyol.
[0113] Table 1 shows the viscosity after standing for 3 days. The ratios here and in other tables are parts per 10...
Embodiment 4-5
[0116] Embodiment 4-5: Adopt the contrast (table 2) of the foam prepared by PIPA1 (DBTL) and PIPA2 (stannous octoate)
[0117] As shown in Table 2, PIPA polymer modified polyols prepared according to PIPA1 and PIPA2 of Examples 1, 2 were mixed with water, toluene diisocyanate and additional polyols and allowed to foam in the presence of a catalyst.
[0118] The foam test method used in this paper is as follows:
[0119] Density (kg / m 3 ) DIN EN ISO 845
[0120] Ballast Deflection (CLD) and Hysteresis (%) in kPa DIN EN ISO 3386-1
[0121] Airflow (cfm) and Ball Rebound (%) ASTM 1564-72
[0122] Tensile strength (kPa) and elongation (%) DIN EN ISO 1799
[0123] Compression set (%) DIN EN ISO 1856
[0124] The product obtained was a stable foam in the case of example 4-PIPA1 (DBTL), but collapsed in the case of example 5-PIPA2 (stannous octoate). The viscosity of PIPA2 is too low.
[0125] Table 2
[0126]
Embodiment 6-16
[0127] Examples 6-16: Comparison of Standard Foams and Foams of the Invention (Tables 3-5)
[0128] Tables 3, 4, and 5 show various polyurethane foam formulations.
[0129] Table 3 shows two examples of the invention (7, 8) compared to a reference standard DBTL / stannous octoate formulation (example 6).
[0130] Table 4 shows three examples (10, 11, 12) compared to the reference standard DBTL / stannous octoate formulation (example 9) and a failure example (example 12) (two are implementations according to the invention example).
[0131] Table 5 shows two examples (14, 15), one of which is an example according to the invention, compared to a reference standard DBTL / stannous octoate formulation (example 13) and a failure example (example 14).
[0132] In each case, the examples show that stannous ricinoleate can be used instead of DBTL or stannous octoate in the preparation of PIPA polymer-modified polyols, and despite the use of catalysts without metal-carbon bonds, Still H...
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