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Once-formed highly-elastic micro-foaming bouncing ball compound and preparation method thereof

A micro-foaming, elastic ball technology, applied in the field of polyurethane, can solve the problems of complex molding process, increased difficulty in operation process, delamination, etc., and achieves the effects of simple process control conditions, easy mixing and uniform molding process.

Inactive Publication Date: 2012-11-21
SHANDONG INOV POLYURETHANE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the continuous development of polyurethane materials, it is now gradually used in the production of elastic balls, but the molding process is still relatively complicated. Generally, polyurethane materials are prepared into semi-finished products, then polished, and then spherical surface brushing, and finally crusted Molding; so there are many artificial unstable factors, which can easily lead to product foaming, delamination, etc.
[0004] Patent CN100506327C reports a preparation method of an improved polyurethane elastic ball, which is to inject polyurethane material into a spherical hollow latex bag, foam and set the shape, such improvement will greatly increase the cohesive force between the internal polyurethane material and the epidermis, reducing the Bubbles, delamination and other problems appear, but the use of latex bags will make the operation process more difficult, and the requirements for operators are higher

Method used

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  • Once-formed highly-elastic micro-foaming bouncing ball compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of the polyol composition: in parts by weight, weigh 100 parts of polytetrahydrofuran ether polyol (PTMG2000, BASF product) with an average functionality of 2 and a number average molecular weight of 2000, 9 parts of 1,4-butanediene Alcohol, 0.2g of water, 0.8 part of amine catalyst (diethylene glycol solution of commercially available triethylenediamine, solid content 33%), 0.06 part of dibutyltin dilaurate in a mixer, stir evenly, remove in vacuum Bubbles, sealed and stored.

[0023] Preparation of modified isocyanate component: 90 parts of polytetrahydrofuran ether polyol (PTMG2000, BASF product) with average functionality = 2, number average molecular weight = 2000 and 10 parts of polytetrahydrofuran ether polyol with average functionality = 3, number average molecular weight = 6000 Ether polyol (EP-3600, product of Shandong Bluestar Dongda Chemical Co., Ltd.) was dehydrated under vacuum (-0.09MPa) at 110°C for 2 hours to ensure that the moisture content...

Embodiment 2

[0026] Preparation of polyol composition: Weigh 80 parts of PTMG2000, 20 parts of EP-3600, 9 parts of 1,4-butanediol, 0.25 g of water, 0.6 parts of amine catalyst (diethylene diamine of commercially available triethylenediamine Glycol solution, solid content 33%) 0.06 parts of dibutyltin dilaurate in a mixer, stir evenly, remove air bubbles in vacuum, seal and store.

[0027] Preparation of modified isocyanate component: dehydrate 100 parts of PTMG2000 in vacuum (-0.09MPa) at 110°C for 2 hours to ensure that the moisture content is less than 0.05%, then cool down to 40°C, add 93.5 parts of pure MDI, and slowly heat up to 75 Insulate and react at ℃ for 1.5 hours, take a sample and test, the mass content of -NCO is 14.07%, cool down to 50 ℃ and discharge, sealed and stored.

[0028] The preparation method of the highly elastic micro-foaming elastic ball is the same as in Example 1.

Embodiment 3

[0030] Preparation of polyol composition: Weigh 80 parts of PTMG2000, 20 parts of polytetrahydrofuran ether polyol (PTMG3000, BASF product) with average functionality=2 and number average molecular weight=3000, 8.0 parts of 1,4-butanediol, 0.2g of water, 0.6 part of amine catalyst (diethylene glycol solution of commercially available triethylenediamine, solid content 33%), 0.06 part of dibutyltin dilaurate in a mixer, stir well, remove air bubbles in vacuum, Keep airtight.

[0031] The preparation of modified isocyanate component: with embodiment 1

[0032] The preparation method of the highly elastic micro-foaming elastic ball is the same as in Example 1.

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Abstract

The invention belongs to the technical field of polyurethane and particularly relates to a once-formed highly-elastic micro-foaming bouncing ball compound and a preparation method thereof. The compound is composed of polyol mixture components and modified isocyanate components. The compound can be used to prepare the highly-elastic bouncing ball by once forming. The preparation method has the advantages that a semi-prepolymerization method is used to prepare the bouncing ball, viscosity of two groups of components are close, mixing temperature is low, materials can be evenly mixed easily, control conditions of the process is simple, and operation is easy; compact surface and foam core can be once formed during formation by using the compound to prepare the bouncing ball, and forming process is simple; and rebounding rate of the microporous bouncing ball prepared by the compound can reach a range of 80-85%.

Description

technical field [0001] The invention belongs to the technical field of polyurethane, and in particular relates to a high-elastic micro-foaming elastic ball composition that can be molded at one time and a preparation method thereof. Background technique [0002] Bouncy balls have been used as an entertainment toy for decades. The original bouncy ball is made of rubber material. In view of the physical state characteristics of the rubber material, it is generally produced by injection molding. The production of bouncy balls requires secondary injection molding to realize, and requires high-temperature vulcanization in the later stage, requiring a large investment in equipment. , the production process is complex and the production efficiency is low. [0003] Patent CN1323733C reports a molding method of a rubber elastic ball. Firstly, two hollow hemispheres are injection molded, the two hemispheres are bonded and injected with liquid, and then a layer of second sphere is inj...

Claims

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Application Information

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IPC IPC(8): C08G18/78C08G18/66C08G18/48C08G18/32C08J9/12C08J9/14C08L75/08
Inventor 徐军孙兆任马翠翠孙清峰
Owner SHANDONG INOV POLYURETHANE
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