Thick-film and low-foam one-component polyurethane elastomer and preparation method thereof

A polyurethane elastomer, one-component technology, applied in the field of thick-coated low-foaming one-component polyurethane elastomer and its preparation, can solve problems such as difficult promotion, heavy color, and acceleration

Inactive Publication Date: 2014-01-15
SHANGHAI BOSEAN WORLD NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the latent curing agents are all basic amine compounds, they can initiate the self-polymerization reaction of isocyanate, and they can catalyze and accelerate the reaction of isocyanate, so the latent curing agent greatly reduces the storage stability of one-component polyurethane. The larger the storage stability, the worse
Polyurethane elastomers with latent curing agents are also accompanied by a very strong odor, heavy color, and a certain degree of toxicity themselves, which makes them difficult to promote in industrial applications

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Mix 90 kg of polyether diol, 130 kg of polyether triol, 80 kg of chlorinated paraffin, 300 kg of heavy calcium and 40 kg of xylene in a reaction kettle, add 40 kg of MDI, and stir for 30 minutes Finally, heat up to 90°C for 1.5 hours, add 1.5 kg of stannous octoate, 20 kg of xylene solvent and 1 kg of oily green color paste, continue the reaction for 30 minutes, add 20 kg of xylene solvent and 13 kg of neutral chemical disinfectant after cooling down. Foaming agent, stir evenly and discharge. The product is an opaque green one-component polyurethane elastomer.

example 2

[0033] 122 kilograms of polyether diols (molecular weight 4000) and 107 kilograms of polyether trihydric alcohols (molecular weight 4800) that vacuum-dried in advance, 0.5 kilograms of butanediol, 60 kilograms of plasticizers, 300 kilograms of heavy calcium, 300 kilograms of talcum powder Mix evenly, add 23 kg of TDI and 50 kg of solvent, stir for 30 minutes, heat up to 65°C for 1 hour, add 1.3 kg of dibutyltin dilaurate and 50 kg of solvent for 1 hour, cool down and add 11 kg of neutral chemical Discharge after defoamer. This product is a toughened opaque elastomer, and the 5mm thick coating will not crack when folded in half.

example 3

[0035] Mix 95 kg of polypropylene oxide ether diol (molecular weight 2000) and 129 kg of polypropylene oxide trihydric alcohol (molecular weight 3000) in a reactor, vacuum -0.09MPa, remove water at 110°C for 30 minutes, add TDI36 after cooling Mix 1 kg for 30 minutes and stir evenly, heat up to 80°C and react for 2 hours, add 0.1% dibutyltin dilaurate, react for 30 minutes, cool to below 50°C, add 20 kg of neutral chemical defoamer, stir evenly Discharge. This product is a transparent one-component polyurethane elastomer.

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Abstract

The invention relates to a thick-film and low-foam one-component polyurethane elastomer and a preparation method thereof. The elastomer is prepared from a one-component polyurethane resin, filler, a neutral chemical defoaming agent and other assistants. The preparation method comprises the following steps: firstly mixing the raw materials such as polyether, the filler, a solvent, a plasticizer and the like in a reaction kettle; adding diisocyanate and the solvent to the reaction kettle to evenly mix and stir, and heating to 80-85 DEG C to react for 2 hours; finally adding a catalyst to react for 30 minutes; cooling to 60 DEG C, and adding the neutral chemical defoaming agent; discharging after stirring for 30 minutes. The bubble content of the one-component polyurethane elastomer to which the neutral chemical defoaming agent is added is reduced by 30-80% in comparison with that of the elastomer to which the neutral chemical defoaming agent is not added; the film can be coated 5mm-1cm one time; the storage stability is 3-6 months.

Description

technical field [0001] The invention relates to a preparation method of a one-component polyurethane elastomer added with a neutral chemical defoamer. The elastomer has a one-time thick coating and can reach 5-10mm, and can be applied to polyurethane elastic sports venues, including basketball courts, Tennis courts, badminton courts, plastic runways, and polyurethane elastic sealants, polyurethane elastic caulking agents, polyurethane elastic hot melt adhesives, polyurethane elastic adhesives and coating materials and other fields. Background technique [0002] One-component polyurethane elastomer is an elastomer that is cured by the reaction of isocyanate groups on polyurethane prepolymers with moisture in the environment. Since there is only one packaging component, there is no need for on-site deployment, there is no problem of metering and mixing, and it is easy to use. It is widely used in elastic sports venues, sealants, caulks, hot melt adhesives, elastic coating mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/32C08K13/02C08K5/5415C08K3/26C08K3/34C08K3/04C09D175/08C09J175/08
CPCC08G18/4812C08G18/6674C09D175/08C09J175/08
Inventor 魏燕彦
Owner SHANGHAI BOSEAN WORLD NEW MATERIAL TECH CO LTD
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