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A kind of high pressure-resistant polyurethane composite material for cold storage floor and preparation method thereof
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A polyurethane composite material and floor technology, applied in the field of polyurethane, can solve problems such as the use of cold storage floors far from being achieved, and achieve the effects of good dimensional stability, high foam mechanical strength, and high compressive strength.
Active Publication Date: 2020-01-21
烟台市顺达聚氨酯有限责任公司
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[0003] The existing patent CN104672420 "A high-strength polyurethane rigid foam and its preparation method and application" discloses a technology with a compressive strength of 200KPa, which is far from meeting the requirements for cold storage floors. Currently, rigid polyurethane foam is commonly used in finished products Density (30-50kg / m 3 ) There is no report that the compressive strength reaches ≥350KPa
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Embodiment 1
[0030] A high-pressure-resistant polyurethane composite material for cold storage floors, which is composed of component A and component B mixed in a weight ratio of 1:1;
[0031] Among them, the A component includes: 22kg polyether polyol BH403, 42kg polyesterpolyol PS3152, 1.2kg foam stabilizer L6950, 0.5kg deionized water, 13kg physical foaming agent 141b, 2kg catalytic plus PT303, 1.8 kg catalyst PT304, 1.6kg catalyst K15, 0.9kg catalyst A33 and 15kg flame retardant TCPP;
[0032] The described B component is 100kg polymethylene polyphenyl polyisocyanate.
[0033] The preparation method of the above-mentioned high-pressure-resistant polyurethane composite material for the floor of the cold storage is as follows:
[0034] (1) Add 22kg polyether polyol BH403 and 42kg polyester polyol PS3152 into the reactor, then add 1.2kg foam stabilizer L6950, 0.5kg deionized water, 13kg physical foaming agent 141b, 2kg catalytic plus PT303, 1.8 kg catalyst PT304, 1.6kg catalyst K15, 0....
Embodiment 2
[0039] A high-pressure-resistant polyurethane composite material for cold storage floors, which is composed of component A and component B mixed in a weight ratio of 1:1;
[0040] Among them, the A component includes: 15kg polyether polyol BH403, 35kg polyester polyol PS3152, 1.0kg foam stabilizer L6950, 1.5kg deionized water, 20kg physical foaming agent 141b, 2kg catalytic plus PT303, 2kg Catalyst PT304, 3kg catalyst K15, 0.5kg catalyst A33 and 20kg flame retardant TCPP;
[0041] The described B component is 100kg polymethylene polyphenyl polyisocyanate.
[0042] The preparation method of the above-mentioned high-pressure-resistant polyurethane composite material for the floor of the cold storage is as follows:
[0043] (1) Add 15kg polyether polyol BH403 and 35kg polyester polyol PS3152 into the reactor, then add 1.0kg foam stabilizer L6950, 1.5kg deionized water, 20kg physical foaming agent 141b, 2kg catalytic plus PT303, 2kg Catalyst PT304, 3kg catalyst K15, 0.5kg cataly...
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Abstract
The invention belongs to the technical field of polyurethane and particularly relates to a highly pressure-resistant polyurethanecomposite material for ground of a cold storage and a preparation method thereof. Through effective matching of phthalic anhydridepolyester and amidogenether, the highly pressure-resistant polyurethanecomposite material reacts with polyaryl polymethylene isocyanate, a rigid benzene ring structure and a high symmetric structure are introduced into a molecular chain to achieve high foam mechanical strength. Excessive isocyanato generates a PIR structure through induction of a catalyst, so that good dimensional stability at a low temperature is implemented, and requirements of high compressive strength are met. An ingredient A and an ingredient B are sprayed on the site through a high-pressure spraying device. Compared with when laying of an XPS is adopted, a construction machine is simple, continuous construction is performed, a seamless connection heat insulation system is formed, air gap correction is not needed, foam is stable, the density is uniform, the heat insulation performance is good, and construction time is saved.
Description
technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a high-pressure-resistant polyurethane composite material for cold storage floors and a preparation method thereof. Background technique [0002] With the rapid development of China's economy and the increasing quality of consumer consumption, the average annual growth rate of cold storage will reach more than 30% in the next 10 years, and the construction of cold storage in my country is still in its infancy. In the process of traditional cold storage design and construction, the load-bearing design of the ground generally requires ≥350KPa, and some even reach 500KPa. Due to the low compressive strength of polyurethane foam, in order to meet the load-carrying needs of forklifts and other transport vehicles, both Extruded polystyrene board (XPS) is often used for the layer-by-layer paving construction of the heat-insulating and load-bearing ground. The thermal i...
Claims
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