Preparation method of intermediate for polyurethane sponge

A technology for polyurethane sponges and intermediates, which is applied in the field of preparation of intermediates for polyurethane sponges, can solve the problems of unstable product quality, uneven sponge structure, labor and material consumption, etc., and achieves long storage validity period and reduced batch differences. , The effect of reducing production and processing costs

Active Publication Date: 2014-07-16
惠州市新达发实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method needs to stir the raw materials isophorone diisocyanate and polyether polyol according to the proportion to obtain an unstable intermediate, and add water, silicone oil, catalyst, etc. under a certain temperature condition, and pour it into the mold for foaming under high-speed stirring. Curing has the following disadvantages: 1) Manufacturers need to purchase all raw materials and ingredients, and produce according to the ratio, which consumes a lot of manpower and material resources; 2) The structure of the sponge with the same formula is uneven, and the physical properties of different batches will be different. not stable phenomenon

Method used

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  • Preparation method of intermediate for polyurethane sponge
  • Preparation method of intermediate for polyurethane sponge

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1. Add 20 parts by weight of isophorone diisocyanate, 100 parts by weight of polyether polyol and 0.005 part by weight of the catalyst stannous octoate into the reactor and stir evenly. The temperature is 50°C and the reaction time is 10 hours to obtain Intermediate for stable polyurethane foam.

Embodiment 2

[0023] Example 2. Add 30 parts by weight of isophorone diisocyanate, 100 parts by weight of polyether polyol and 0.01 part by weight of organic bismuth catalyst into the reactor and stir evenly. The temperature is 90°C and the reaction time is 6 hours. Intermediate for stable polyurethane foam.

Embodiment 3

[0024] Example 3: Add 40 parts by weight of isophorone diisocyanate, 100 parts by weight of polyether polyol and 0.5 parts by weight of catalyst 1,4-diazabicyclo 2.2.2 octane into the reactor and stir evenly, and the temperature is 35°C, the reaction time is 48 hours, and a stable polyurethane sponge intermediate is prepared.

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Abstract

The invention provides a preparation method of an intermediate for polyurethane sponge. The preparation method comprises the steps of adding 20-80 parts of isophorone diisocyanate, 100 parts of polyether polyol and 0.001-1 part of catalyst in a reaction kettle in parts by weight, uniformly stirring, and reacting for 2-72 hours at the temperature of 10-100 DEG C to prepare a stable intermediate for polyurethane sponge, wherein the catalyst at least comprises one of an organic tin catalyst, an organic bismuth catalyst and an amine catalyst. The polyurethane sponge prepared by adopting the intermediate prepared by adopting the preparation method is uniform in structure, reduced in difference among batches, and large in popularization value during production of the polyurethane sponge.

Description

technical field [0001] The invention belongs to the technical field of sponge preparation, and in particular relates to a preparation method of an intermediate for polyurethane sponge. Background technique [0002] Polyurethane sponge is widely used in various industries, such as textile, automobile, civil aviation and other industries, and the scale is constantly expanding. At present, there are many polyurethane sponge manufacturers in my country, but most of them use toluene diisocyanate (abbreviated in English name: TDI) or diphenylmethane diisocyanate (abbreviated in English name: MDI) as the main raw material, and then polymerized Polyol reacts to produce polyurethane sponge. Because the amine group in the molecular structure of TDI or MDI is connected to the benzene ring, it is easy to produce a conjugation effect under the stimulation of the external environment, so it is easy to age or be oxidized, and has poor light resistance, which is manifested as easy yellowing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/75C08G18/48C08G18/24C08G18/22C08G18/20C08G18/18C08G101/00
CPCC08G18/10C08G18/1808C08G18/2063C08G18/227C08G18/242C08G18/244C08G18/48C08G18/755C08G2101/00C08J9/145C08J2203/142C08J2375/08C08G2110/0083C08G18/6674
Inventor 胡志刚
Owner 惠州市新达发实业有限公司
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