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High-reverse-shift elastic biomass water-based PU (Polyurethane) resin and formula development technology

A biomass and reaction technology, applied in the field of polymer materials, can solve the problems of poor adhesion of substrates or substrates, limiting the development and application of biomass water-based PU, and difficulty in controlling the molecular weight and quality of synthetic polyester polyols.

Pending Publication Date: 2021-06-18
COATING P MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyols belong to the soft chain segment in the water-based PU structure. Therefore, if the existing biomass-based diols are combined with non-biogenic dicarboxylic acids, it is desired to pass the USDA biomass certification with a biomass content of ≥ 25%. , need to use a high amount of polyols, resulting in the mechanical properties of the final PU being more viscous and fluid, so it cannot meet the high viscoelastic requirements of water-based PU, which greatly limits the development and application of bio-based water-based PU
In addition, although itaconic acid is a biomass-based dicarboxylic acid, if itaconic acid is directly used in the synthesis of polyester polyols, the double bond of unhydrogenated itaconic acid is prone to free radical polymerization at high temperature, so it is difficult to Control the molecular weight and quality of the synthetic polyester polyol, and the double bond is easy to cause the PU material to have problems such as yellowing, cracking, poor film-forming performance, and poor adhesion to the substrate or substrate, which requires further modification or grafting, etc. Complicated synthesis reaction, so it is not suitable for large-scale production

Method used

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  • High-reverse-shift elastic biomass water-based PU (Polyurethane) resin and formula development technology
  • High-reverse-shift elastic biomass water-based PU (Polyurethane) resin and formula development technology
  • High-reverse-shift elastic biomass water-based PU (Polyurethane) resin and formula development technology

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Experimental program
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preparation example Construction

[0036] Preparation method of polyester polyol with high biomass content

[0037] The method for producing the polyester polyol used in the present invention includes reacting 2-methylsuccinic acid with dibasic alcohol and dibasic acid further added as the case may be.

[0038] In a specific example of preparing the polyester polyol used in the present invention, the method for preparing the polyester polyol with high biomass content at least comprises the following steps:

[0039] (1) Add alkyl polyol, alkyl polyacid and antioxidant system to the reactor;

[0040] (2) Carry out the reaction at a temperature not higher than 160°C in a stable gas environment and then increase the reaction temperature to 180-230°C to continue the reaction;

[0041] (3) When the acid value is lower than the first target value, apply a vacuum condition to the reactor and make the reaction continue;

[0042] (4) the reaction is completed when the acid value is lower than the second target value; ...

example

[0081] The present invention is further described in detail through the following examples. It is necessary to point out that the following examples are only used to further illustrate the present invention, and cannot be interpreted as limiting the protection scope of the present invention, and those skilled in the art make some non-essential improvements to the present invention according to the above-mentioned content of the present invention And adjustments still belong to the protection scope of the present invention. Before discussing several non-limiting embodiments of the invention, it is to be understood that the invention is not limited in its application to the details of the particular non-limiting embodiments shown and discussed herein, as the invention is capable of other embodiments. Furthermore, the terminology used herein to discuss the present invention is for the purpose of description and not limitation. Furthermore, the discussion of like numbers below re...

example 1

[0085] Weigh 200g of biomass polyester polyol (molecular weight: 1,000, biomass content 50%) that has been treated by vacuum drying and dehydration, stir evenly and heat to 60°C, and weigh 53.7g of 1,6-hexamethylene diisocyanate (HDI ), add 0.04g of dibutyltin dilaurate catalyst, keep the temperature at 80°C for polymerization reaction, the reaction time is 2 hours, react until the NCO content reaches the theoretical value, and prepare the polyurethane prepolymer; 150g acetone and 50g N,N-dimethylformamide to dilute the prepolymer viscosity (avoid adding a large amount in a short time to avoid agglomeration or glue jam on the tank wall), weigh 18.65g sodium diaminobenzenesulfonate, and stir evenly for 10 minutes Finally, increase the stirring rate, slowly drop 350g water into the polyurethane prepolymer, emulsify for 10 minutes and turn to the water phase, add 1.73g diethylenetriamine and 2.05g ethylenediamine, after confirming that there is no NCO residue, keep warm Distill u...

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Abstract

The invention relates to a high-reverse-shift elastic biomass water-based PU (Polyurethane) resin and formula development technology, in particular to the field of polymer materials, in particular to a water-based biomass polyurethane emulsion, and particularly relates to polyester polyol prepared by taking 2-methylsuccinic acid (2-mSA) as a polymeric monomer as the polymeric monomer. The invention also relates to a preparation method of the water-based biomass polyurethane emulsion.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to an aqueous biogenic polyurethane emulsion, and also relates to a preparation method of an aqueous biogenic polyurethane emulsion. Background technique [0002] In the past, we only paid attention to the performance, properties and cost of materials in terms of materials. With the rise and promotion of global sustainability awareness, industries in various fields have also begun to consider the impact and impact of materials on the environment from the perspective of life cycle. For this reason, brand owners in various fields in the world have plans or are developing the innovation and application of biomass materials. [0003] Itaconic acid among organic acids has been listed by the US Department of Energy as one of the twelve most potential biochemical compounds. In 2015, the annual global demand for itaconic acid was 50,000 tons, and the output value was about NT$4 billion. I...

Claims

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Application Information

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IPC IPC(8): C08G18/10C08G18/12C08G18/66C08G18/42C08G18/34C08G18/48C08G18/32
CPCC08G18/10C08G18/12C08G18/6651C08G18/664C08G18/6655C08G18/6659C08G18/6625C08G18/6618C08G18/6622C08G18/4238C08G18/4269C08G18/4202C08G18/348C08G18/4018C08G18/4825
Inventor 林永泰翁钰鼎陈俊业
Owner COATING P MATERIALS CO LTD
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