Slow-recovery foam with low temperature resistance and high density as well as preparation method thereof
A slow-rebound sponge and high-density technology, which is applied in the field of organic polymer synthesis, can solve problems such as poor bearing capacity, particularly large impact on hardness, and low density, and achieve cost-saving and good hole-opening effects
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[0027] Example 1
[0028] (1) Polyether polyol A (hydroxyl value 40, functionality 3, polyoxypropylene oxide triol) 55g, polyether polyol B (hydroxyl value 50, functionality 4, polyoxypropylene triol) 45g, Polyether polyol C (hydroxyl value 360, functionality 3, polyoxypropylene oxide ethylene triol) 15g was added to a 1L beaker, then C-225 0.1g, L-580 3g, A33 0.9g, isooctanoic acid 0.3 g of bismuth and 1 g of deionized water were stirred for 30 seconds.
[0029] (2) Modified black material: Weigh 20g of modified black material.
[0030] (3) Free foaming: pour the weighed modified black material into the combined polyether, then stir for 7 seconds under a mixer with a rotating speed of 4000-4500r / min, and pour the foamed liquid into the mold. Cut after 24 hours. The finished product of high-density slow rebound sponge is obtained.
[0031] Rebound time is about 4 seconds; hardening is not obvious in the temperature range of 0-10℃, and it has low temperature resistance effect; densi...
Example Embodiment
[0032] Example 2
[0033] (1) Polyether polyol A (hydroxyl value 50, functionality 4.5, polyoxypropylene oxide triol) 48g, polyether polyol B (hydroxyl value 65, functionality 4.5, polyoxypropylene triol) 36g , Polyether polyol C (hydroxyl value 400, functionality 3.5, polyoxypropylene oxide ethylene triol) 8g into a 1L beaker, and then add 0.4g C-225, 3.8g L-580, 1.3gA33, iso 0.3 g of bismuth octoate and 1 g of deionized water were stirred for 30 seconds.
[0034] (2) Modified black material: Weigh 40g of modified black material.
[0035] (3) Free foaming: quickly pour the weighed modified black material into the combined polyether, then stir for 7 seconds under a mixer with a rotating speed of 4000-4500r / min, and pour the foamed liquid into the mold , Cut after 24 hours. The finished product of high-density slow rebound sponge is obtained.
[0036] Rebound time is about 4.5 seconds; hardening is not obvious in the temperature range of 0-10℃, with low temperature resistance effect...
Example Embodiment
[0037] Example 3
[0038] (1) Put polyether polyol A polyoxypropylene oxide ethylene triol 55g, DEP-560D 30g, DMN-550 15g into a 1L beaker, then add C-2250.1g, 3gL-580, 0.9g A33, iso 0.3 g of bismuth octoate and 1 g of deionized water were stirred for 30 seconds.
[0039] (2) Modified black material: weigh 60g of modified black material according to the formula.
[0040] (3) Free foaming: quickly pour the weighed modified black material into the combined polyether, then stir for 7 seconds under a mixer with a rotating speed of 4000-4500r / min, and pour the foamed liquid into the mold , Cut after 24 hours. The finished product of high-density slow rebound sponge is obtained.
[0041] Rebound time is about 4 seconds; hardening is not obvious in the temperature range of 0-10℃, with low temperature resistance effect; density is 75g / m 3 , The bearing capacity is twice as high as the slow rebound sponge on the market.
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