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A kind of low-density ultraviolet radiation resistant polyurethane sponge and preparation method thereof

A polyurethane sponge and UV-resistant technology, which is applied in the field of polyurethane sponge production, can solve the problems of affecting the output rate of the sponge, the effect is not necessarily obvious, and the foam height is reduced, and achieves good self-release ability, low equipment requirements, and low total cost. Effect

Active Publication Date: 2022-04-22
WANHUA CHEM GRP CO LTD +1
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Problems solved by technology

But in many cases, the increase of the silicone oil content often leads to a decrease in the foam height, which affects the sponge output rate
Low-density sponges generally have mold staining. Even if the mold is treated with a mold release agent in advance, it will not only increase the process and increase the cost, but the effect may not be obvious

Method used

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  • A kind of low-density ultraviolet radiation resistant polyurethane sponge and preparation method thereof

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Embodiment 1-4 and comparative example 1-2

[0035] Anti-ultraviolet radiation type polyurethane sponge, according to parts by weight, its formula is as shown in table 1:

[0036] Table 1 embodiment and comparative example formula are as follows

[0037] Comparative example 1 Comparative example 2 Example 1 Example 2 Example 3 Example 4 Polyether polyol F3156 100 100 100 100 100 100 Tetrabutyl titanate 6 6 10 2.5 14 tributyl citrate 0.5 8 5 1.2 water 5 5 5 8 9 7 Triethylenediamine 0.13 0.1 0.13 0.1 0.05 0.07 stannous octoate 0.1 0.1 0.1 0.4 0.3 0.2 Silicone oil B8123 2 2 2 1.5 2 2.5 Dichloromethane 16 16 16 10 15 9 TDI 52 52 52 60 65 55

[0038] The preparation method of ultraviolet radiation resistant type polyurethane sponge comprises the following steps:

[0039] (1) Premixing: 50 parts of dehydrated polyether polyol F3156 with a water content of 180ppm are premixed with tetrabutyl titanate an...

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Abstract

The invention provides an ultraviolet radiation-resistant polyurethane sponge and a preparation method thereof. The formula includes: 100 parts of polyether polyol, 2 to 15 parts of tetrabutyl titanate, and 0.1 parts of tributyl citrate in parts by weight. ~10 parts, 4~9 parts of water, 0.05~0.2 parts of amine catalyst, 0.1~0.4 part of organotin catalyst, 1.0~3.0 parts of foam stabilizer, 8~20 parts of dichloromethane, 50~65 parts of TDI. The low-density polyurethane sponge prepared by the invention has better pore distribution, and the height of the sponge is not affected; no mold release agent is needed, it can be completely detached from the mold after curing, and it has better ultraviolet resistance and resistance.

Description

technical field [0001] The invention belongs to the technical field of polyurethane sponge production, and relates to a low-density ultraviolet radiation-resistant polyurethane sponge and a preparation method thereof. Background technique [0002] Polyurethane sponge products have gradually become popular in people's lives, including seats, sofas, mattresses and other household items made of sponge. In the polyurethane sponge industry, TDI (toluene diisocyanate) is the main raw material for the production of polyurethane sponge. Since TDI (toluene diisocyanate) itself has a benzene ring, it is extremely prone to free radical transitions and damages under the condition of ultraviolet radiation. The structure itself causes the color to turn yellow, affects the appearance, and even reduces the mechanical properties. [0003] Existing sponges prepared with isocyanate and polyether polyols, the UV-resistant method in the usual sense is generally to add organic stabilizers, such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/76C08G18/48C08G18/08C08J9/14C08L75/08C08L83/04C08K3/22C08K5/11C08G101/00
CPCC08G18/7621C08G18/4837C08G18/08C08J9/145C08J9/0023C08J9/0066C08J9/0095C08G2101/00C08J2375/08C08J2483/04
Inventor 彭华庆金振宇齐旺顺张宏科
Owner WANHUA CHEM GRP CO LTD
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