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All-water-foaming polyurethane foam as well as preparation method and application thereof
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A polyurethane foam, all-water foaming technology, applied in the field of polymer materials, can solve the problems of decreased tear strength, increased apparent density, affecting the application of polyurethane foam, etc., to improve compressive strength, low apparent density, overcome tear The effect of crack strength reduction
Active Publication Date: 2021-07-27
成都科大博创科技有限公司
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Abstract
Description
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[0004] Although the above method can greatly improve the compressive properties of polyurethane foam, with the increase of compressive strength, there are also problems such as the decrease of tear strength and the increase of apparent density, which affects the application of polyurethane foam
Method used
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Embodiment 1
[0028] Embodiment 1, the preparation of full water foaming polyurethane foam of the present invention
[0032] Weigh each raw material according to the weight in the raw material formula, mix component A, and stir with high-speed machinery, the stirring speed is ≥2000r / min, and the stirring time is 60s; after stirring evenly, quickly pour component B into component A , high-speed mechanical stirring, the stirring speed is ≥2000r / min, and the stirring time is 10-15s; pour the stirred raw materials into the mold with polyethylene film on the inside, free foaming for ≤2min, after the foaming, room temperature curing After 24 hours, a fully water-blown polyurethane foam was obtained, which was named Neat.
Embodiment 2
[0033] Embodiment 2, the preparation of full water foaming polyurethane foam of the present invention
[0038] Weigh each raw material according to the weight in the raw material formula, mix component A, and stir with high-speed machinery, the stirring speed is ≥2000r / min, and the stirring time is 60s; after stirring evenly, quickly pour component B into component A , high-speed mechanical stirring, the stirring speed is ≥2000r / min, and the stirring time is 10-15s; pour the stirred raw materials into the mold with polyethylene film on the inside, free foaming for ≤2min, after the foaming, room temperature curing After 24 hours, a fully water-blown polyurethane foam was obtained, which was named GP-20.
Embodiment 3
[0039] Embodiment 3, the preparation of full water foaming polyurethane foam of the present invention
[0043] Weigh each raw material according to the weight in the raw material formula, mix component A, and stir with high-speed machinery, the stirring speed is ≥2000r / min, and the stirring time is 60s; after stirring evenly, quickly pour component B into component A , high-speed mechanical stirring, the stirring speed is ≥2000r / min, and the stirring time is 10-15s; pour the stirred raw materials into the mold with polyethylene film on the inside, free foaming for ≤2min, after the foaming, room temperature curing After 24 hours, a fully water-blown polyurethane foam was obtained, which was named V-20.
[0044] The beneficial effects of the present invention are illustrated below through test examples.
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Abstract
The invention provides all-water-foaming polyurethane foam as well as a preparation method and application thereof, belonging to the field of high polymer materials. The polyurethane foam is prepared from the following components in parts by weight: 80-120 parts of polyol, 3-10 parts of a chain extender, 1-5 parts of a foaming agent, 1-6 parts of an amine catalyst, 0.1-1.5 parts of a gel catalyst, 2-8 parts of a surfactant, 1-10 parts of a cross-linking agent and 40-150 parts of isocyanate. The polyurethane foam prepared by all-water foaming is green and environment-friendly. Meanwhile, the prepared foam is good in internal foam structure, low in apparent density, small in self weight and good in tear resistance and pressure resistance. According to the polyurethane foam, the compression strength is improved, the problems that tearing strength is reduced and apparent density is increased are solved, meanwhile high compression strength, high tearing strength and low apparent density are achieved, the overall performance of the polyurethane foam is improved, and the polyurethane foam can be used for preparing materials used in automobile interiors, damping and buffering, sound absorption, packaging and the like and has wide application prospects.
Description
technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an all-water foamed polyurethane foam and its preparation method and application. Background technique [0002] Polyurethane foam is a high molecular polymer formed by foaming with isocyanate and polyether as the main raw materials under the action of various additives. Polyurethane foam is composed of alternating soft and hard segments. The hard segment structure gives the foam rigidity; the soft segment structure gives the foam viscoelasticity. Polyurethane foam can be divided into rigid polyurethane foam, semi-rigid polyurethane foam and soft polyurethane foam according to the hardness of the foam. As a porous material, polyurethane foam has excellent sound absorption, sound insulation and damping properties, and is widely used in automotive interior parts, shock-absorbing cushioning materials, packaging materials, and sound-absorbing materials. [0003] The comp...
Claims
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Application Information
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