CN1670065A

CN1670065A - J-TPV, a blend type crosslinked rubber powder thermoplastic elastomer

Info

Publication number: CN1670065A
Application number: CN 200410017072
Authority: CN
Inventors: 贡瑞华
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-03-19
Filing date: 2004-03-19
Publication date: 2005-09-21

Abstract

The invention relates to a blending type thermoplastic elastomer, which is also called blending type thermoplastic rubber (TPV), and especially a blending type vulcanized rubber powder thermoplastic elastomer called J-TPV, which has a good physical-mechanical property, also can be used in many arts such as extrusion, injection, coining and plastic-coated to produce the rubber product. The rubber powder is a netted fragment of polysulfide rubber. There are the unreacted double bonds and active groups produced at fracture on structure, adding compatibilizer and curing agents to react with other components and produce the new crosslinked network, at the same time, the crosslinked network is disintegrated to finer rubber particles by mechanical shearing force and highly disperses in melt resin phase for getting the product.

Description

Commixed type vulcanized rubber powder thermoplastic elastomer: J-TPV

1, the present invention relates to a kind of blending thermoplastic elastomer, claim blending type thermoplastic rubber (international general designation TPV or TPE) again, especially a kind of vulcanized rubber powder of after Mechanical Crushing, obtaining with old tire (hereinafter to be referred as rubber powder) as and with the commixed type vulcanized rubber powder thermoplastic elastomer that raw material is made, be referred to as J-TPV.

At present, the blending thermoplastic elastomer of known all trades mark (to call TPV in the following text) is all made with the blend of rubber and plastics, and is wherein the most representative with the dynamic vulcanized comixture of polypropylene (PP) with terpolymer EP rubber (EPDM).

In the TPV that EPDM/PP makes, the rubber components of dynamic vulcanization is ground into particulate about the about 0.6-2.0 μ of particle diameter m by mechanical shear stress, high dispersing in the fused resin mutually in, make TPV have the dual nature of rubber and plastics concurrently: to show rubber property at normal temperatures, high temperature shows plastic properties down, can with extrude, technology such as injection, mold pressing, plastic-coated removes to produce rubber item, productive rate height, precision height, and do not need traditional rubber-moulding equipment, tailing in the production, defect ware can directly be recycled, and good mechanical and physical performance is arranged, of many uses.From late nineteen seventies after all (MONSANTO) company researches and develops successfully by U.S. Meng Shan in last century, TPV worldwide obtains fast development.

2, the purpose of this invention is to provide a kind of commixed type and with the thermoplastic elastomer of vulcanized rubber powder because rubber powder is cheap, be rubber 1/3rd in addition lower, replace most of virgin rubber with it, cost is reduced greatly, saved resource, alleviated the environmental pollution that waste tire causes.

About 17.5 hundred million of the old tire of changing from car and truck in whole world every year, traditional method of utilizing is to make reclaimed rubber after pulverizing, the desulfurization, or lay runway, athletic ground and modification highway pitch with micelle, rubber powder, the tire renovation of haveing been friends in the past in addition waits some utilizations, but this type of utilizes class not high, added value is also low, also easily causes secondary pollution.Up to now, the annual old tire less than of recycling 20% in the whole world.

3, the present invention is achieved in that rubber powder is the netted fragment of a kind of vulcanized rubber of obtaining by the mechanical disintegration old tire, original cross-linking density is not high, the active group that exists unreacted pair of key and fracture place to produce on the structure, thereby adding expanding material, behind promoting agent and the vulcanizing agent, can be compatible with other blend components, and in the hot environment of twin-screw mixer forcing machine (or Banbury mixer), generate new cross-linked network, be ground into simultaneously the vulcanized rubber particles of more trickle (about 1-5 μ m) again by mechanical force, high dispersing in the fused resin mutually in, forming vulcanized rubber is " island " phase, resin is " sea-island " structure of " sea " phase, thereby makes identical with general T PV phase structure, the J-TPV that performance is similar.

The basic recipe of J-TPV is as follows: the material name weight part

A. rubber powder (160 order) 25-33

B. rubber-like 20-27

C. resene (polyolefins or other) 15-18

D. increase-volume thing 8-12

E. antioxygen, anti-aging agent 0.3-0.5

F. linking agent (vulcanizing agent) 0.3-0.5

G. other 5-9 add up to: 100

In J-TPV made, the blended rubber powder was not the simple physics blending, but the reactively blending of chemistry; The cross-linking system that uses can be sulfur sulfide system, organic peroxide systems or phenolic resin system; The main rubber composition of rubber powder is natural gum, butadiene-styrene rubber and cis-butadiene cement, thereby needs to select resin, rubber and the increase-volume thing compatible with its energy.

Because adopt such scheme, cost reduces greatly, also make old tire that better broader utilization has been arranged.

4, the invention will be further described below in conjunction with drawings and Examples:

Accompanying drawing 1 is a process flow sheet of the present invention, has shown that intactly the present invention is by the technological process of production of raw and auxiliary material to finished product.

Accompanying drawing 2 is microcosmic synoptic diagram of the present invention:

In shown in the accompanying drawing 2, (1) successive resin phase-" sea " phase is given the plastic properties under the J-TPV high temperature;

(2) the sulfide rubber phase of high dispersing-" island " phase is given rubber property under the J-TPV normal temperature.

Claims

1. a blending thermoplastic elastomer of also using vulcanized rubber powder (hereinafter to be referred as rubber powder) is referred to as commixed type vulcanized rubber powder thermoplastics type elastomerics: J-TPV.Make blending thermoplastic elastomer owing to adopt rubber powder to replace part rubber, thereby cost is reduced greatly.

2. claim 1, the basic recipe of claimed J-TPV is characterized in that containing in the blend components rubber powder, and rubber powder is from the old tire or the waste rubber product of Mechanical Crushing.

3. according to claim 1; the manufacturing process of claimed J-TPV; it is characterized in that rubber powder and part component make earlier rubber master batch then by twin screw extruder (or Banbury mixer) again with other component blend; and generate new cross-linked network; cut into trickleer rubber grain through mechanical force again; be scattered in resin mutually in, obtain finished product.