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Regenerated sponge rubber and preparation method thereof

A technology of sponge glue and polyether polyol, applied in the field of sponge glue, can solve the problems of high tear strength, poor adhesion, large odor, etc., and achieve the effect of high tear strength, good adhesion and high cost performance.

Inactive Publication Date: 2015-01-28
ZIBO DEXIN LIANBANG CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of regenerated sponge glue and its preparation method, solve the shortcomings of traditional recycled sponge glue, such as poor cohesiveness and strong odor, no three wastes are discharged in the production process, good cohesiveness, no benzene substances, and good toughness , high tear strength, high cost performance, and its preparation method is simple and easy to implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Regenerated sponge rubber is made from the following raw materials in parts by weight:

[0023] 79 parts of polyether polyol DMN-1500, 3.5 parts of organic bismuth catalyst, 20 parts of methylene chloride, 15 parts of diphenylmethane diisocyanate; the NCO% of the synthetic product is 7%.

[0024] The preparation method of regenerated sponge rubber is as follows:

[0025] Heat polyether polyol to 110.0°C for 2 hours in vacuum dehydration, cool down to 50°C, add diphenylmethane diisocyanate, heat up to 85°C and react for 2.5 hours, then cool down to 50°C, add dichloromethane and organic bismuth catalyst, stir 20 minutes, that is synthetic products.

Embodiment 2

[0027] Regenerated sponge rubber is made from the following raw materials in parts by weight:

[0028] 45 parts of polyether polyol DDL-1000, 1.5 parts of organic bismuth catalyst, 22 parts of dichloromethane, 12 parts of diphenylmethane diisocyanate; the NCO% of the synthetic product is 6.5%.

[0029] The preparation method of regenerated sponge rubber is as follows:

[0030] Heat polyether polyol at 115°C for 2.5 hours in vacuum dehydration, cool down to 50°C, add diphenylmethane diisocyanate, heat up to 82°C and react for 3 hours, then cool down to 40°C, add dichloromethane and organic bismuth catalyst, stir 25 minutes, that is synthetic products.

Embodiment 3

[0032] Regenerated sponge rubber is made from the following raw materials in parts by weight:

[0033] 85 parts of polyether polyol DMN-1500, 4 parts of organic bismuth catalyst, 25 parts of dichloromethane, 10 parts of diphenylmethane diisocyanate; the NCO% of the synthetic product is 5.0%.

[0034] The preparation method of regenerated sponge rubber is as follows:

[0035] Heat polyether polyol to 112.0°C for 2 hours in vacuum dehydration, cool down to 55°C, add diphenylmethane diisocyanate, heat up to 85°C and react for 2 hours, then cool down to 42°C, add dichloromethane and organic bismuth catalyst, stir 30 minutes, that is synthetic products.

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Abstract

The invention belongs to the chemical field and in particular relates to regenerated sponge rubber and a preparation method thereof. The regenerated sponge rubber is prepared from the following raw materials in parts by weight: 45-85 parts of polyether polyol, 1.5-4.0 parts of a catalyst, 20-25 parts of a diluent and 10-15 parts of polyisocyanate, wherein NCO percent of a synthetic product is 5.0-7.0 percent. The preparation method comprises the following steps: raising temperature of the polyether polyol until 100-110 DEG C, carrying out vacuum dewatering for 2-2.5h, cooling to 50-60 DEG C, adding the polyisocyanate, raising temperature until 80-85 DEG C, reacting for 2-3h, cooling below 50 DEG C, adding the diluent and the catalyst, and stirring for 20-30min to obtain the synthetic product. The regenerated sponge rubber has the advantages of high bonding degree, good toughness, large tear strength, no peculiar smell, environmental protection, no three wastes discharge in production of the product and the like.

Description

technical field [0001] The invention relates to a sponge glue, in particular to a regenerated sponge glue and a preparation method thereof. Background technique [0002] The annual production of sponge, that is, polyurethane products in the world is close to 7 million tons, and a large amount of waste will be generated in the production process and after consumption of such products; after the service life is exceeded, polyurethane products will also decline due to their performance. scrapped. In order to protect the environment, these waste materials must be effectively recycled and reused. Making waste sponges into recycled sponges not only reduces production costs, improves the effective utilization of materials, but also meets the requirements of environmental protection. Therefore, recycled sponges have become a global sponge treatment method. The treatment of regenerated sponges often requires regenerated sponge glue. The traditional recycled sponge glue has poor ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/48C08G18/22C09J175/08
CPCC08G18/4829C08G18/227C09J175/08
Inventor 耿佃勇荆晓东王帅董伟
Owner ZIBO DEXIN LIANBANG CHEM IND
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