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Method for retreading old tyre by using polyurethane elastomer material

A polyurethane elastomer, used tire technology, applied in tires, applications, household appliances, etc., can solve the problems of high cost, complex tire retreading equipment and processes, and achieve long service life, good economic prospects, and low equipment investment. Effect

Inactive Publication Date: 2009-02-11
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its tire retreading equipment and process are more complicated, and the cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1: Retreaded tires directly poured

[0043] Step 1: Inspection and treatment of waste tires

[0044] The used tires in this embodiment should have a good carcass and only about 50% of the tread wear. After a little grinding and maintenance, keep the tread rubber that has not worn out.

[0045] Step 2: Preparation of trichloroisocyanuric acid surface treatment agent

[0046] Weigh 10 parts by weight of trichloroisocyanuric acid, add it into 100 parts by weight of mixed solvent, stir and dissolve, and then prepare the surface treatment agent, which is ready-to-use and used up on the same day. The formula of the mixed solvent is as follows: 60 parts by weight of ethyl acetate, 30 parts by weight of methyl ethyl ketone and 10 parts by weight of xylene, and then fully mixed to obtain the mixed solvent.

[0047] Step 3: Preparation of polyurethane elastomer prepolymer

[0048] Weigh 100 parts by weight of polycaprolactone diol with a molecular weight of 2000, put it ...

Embodiment 2

[0054] Embodiment 2: Retreaded tire with long strip full polyurethane precured tread

[0055] Step 1: Surface treatment of waste tires

[0056] The waste tire tread in this embodiment has basically been worn out, and is ground and repaired according to the routine to the technological condition that the prevulcanized tread can be turned over.

[0057] Step 2: Preparation of surface treatment agent and adhesive

[0058] (1) Preparation of trichloroisocyanuric acid surface treatment agent

[0059] Weigh 8 parts by weight of trichloroisocyanuric acid, add it into 100 parts by weight of the mixed solvent, stir until completely dissolved, and then prepare the surface treatment agent, which needs to be used up within 30 hours. The formula of the above mixed solvent is: 80 parts by weight of ethyl acetate, 10 parts by weight of methyl ethyl ketone, and 10 parts by weight of xylene.

[0060] (2) Preparation of hydroxyl polyurethane adhesive

[0061] Weigh 100 parts by weight of po...

Embodiment 3

[0074] Embodiment 3: Retreaded tire with annular full polyurethane precured tread

[0075] Step 1: Surface treatment of waste tires

[0076] The waste tire tread in this embodiment has basically been worn out, and is ground and repaired according to the routine to the technological condition that the prevulcanized tread can be turned over.

[0077] Step 2: Preparation of surface treatment agent and adhesive

[0078] (1) Preparation of trichloroisocyanuric acid surface treatment agent

[0079] Weigh 5 parts by weight of trichloroisocyanuric acid, add it into 100 parts by weight of the mixed solvent, stir until it is completely dissolved, and then prepare the surface treatment agent. The solvent needs to be prepared immediately and used up within 30 hours. The formula of the above mixed solvent is: 70 parts by weight of ethyl acetate, 10 parts by weight of methyl ethyl ketone, and 20 parts by weight of xylene.

[0080] (2) Preparation of hydroxyl polyurethane adhesive

[008...

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PUM

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Abstract

The old tyre retreating method by using polyurethane elastomer material mainly includes the following steps: (1). preparing symclosene surface treating agent and hydroxypolyurethane adhesive; (2). selecting oligomer polylol and 1,4-phenylene diisocyanate system as polyurethane elastomer performed polymer and selecting low-molecule polylol or diamine as chain extender; and (3). according to the tyre state defining tread pouring mode, including two kinds of directly pouring for renovating tyre and prevulcanized treat pouring.

Description

technical field [0001] The present invention relates to old tire retreading technology, especially a method for retreading old tires with polyurethane elastomer materials, which can be widely applied to old tires made of polyurethane elastomer materials or polyurethane elastomer materials and ordinary rubber tread rubber. refurbished. Background technique [0002] With the increase of social car ownership, the number of scrapped tires is huge every year, which seriously pollutes the environment. But have quite a large part in the scrapped tire just account for about 20% tire tread wear of cost, and account for 70~80% carcass of tire cost basically intact. Retreading tires is to paste new treads on the tires with intact carcass in the waste tires after repairing. This makes the old tires valuable again. At present, due to the relatively backward materials and technology for retreading, not only the quality of retreaded tires is poor, but also the labor productivity and cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29D30/54B29K75/00B29L30/00
Inventor 张海马铁军易玉华
Owner SOUTH CHINA UNIV OF TECH