CN103509206A - Aging-resistant flame-retardant modified calcium carbonate used for auto tyres, and preparation method thereof - Google Patents

Abstract

The invention provides an aging-resistant flame-retardant modified calcium carbonate used for auto tyres. The aging-resistant flame-retardant modified calcium carbonate comprises following raw material ingredients, 98 to 100 portions of heavy calcium carbonate, 1 to 2 portions of triethyl citrate, 0.2 to 0.3 portion of dispersing agent NNO, 0.1 to 0.3 portion of Span-40, 1 to 2 portions of ferrocene, 0.5 to 0.6 portion of barium stearate, 0.1 to 0.2 portion of anti-aging agent RD, 0.2 to 0.3 portion of 2-mercaptobenzimidazole, 0.1 to 0.2 portion of cross-linking agent TAIC, 1 to 2 portions of super abrasion furnace black N110, 2 to 3 portions of Intermediate super abrasion furnace black N220, 0.1 to 0.3 portion of zinc borate, 0.2 to 0.4 portion of magnesium hydroxide and 1 to 2 portions of gama-methacryloxy propyl trimethoxyl silane. The preparation method comprises following steps: calcium carbonate is dried; the rest raw material ingredients are added according to the ratio and a preset sequence; the mixture is mixed fully in a high-speed mixer, and is dried and grinded so as to obtain the modified calcium carbonate. The modified calcium carbonate is high in dispersity, aging resistance and flame resistance, and can be used for auto tyres so as to reduce cost and improve processing properties and aging resistance of tyre rubber.

Description

Modified calcium carbonate and preparation method thereof for a kind of aging-resistant flame-proof doughnut

Technical field

The present invention relates to mineral filler field, be specifically related to modified calcium carbonate and preparation method thereof for a kind of aging-resistant flame-proof doughnut.

Background technology

Water-ground limestone is a kind of conventional mineral filler, and, low price wide because originating etc., are widely used in the fields such as rubber, plastics, coating.But water-ground limestone surface hydrophilic oleophobic, specific surface area are large, surface can be high, very easily reunite between particle, when directly or in a large number filling in organic basis material, not only be difficult to disperse equably, and very weak with the bonding force of matrix, cause some degradation of two-phase interface defect, matrix material.Therefore, in order to widen its Application Areas, must make its surperficial oleophilic drainage to water-ground limestone modifying surface, the consistency of enhancing and organic matrix, improves the dispersiveness in organic matrix, improves the performance of matrix material.

Summary of the invention

The invention provides modified calcium carbonate and preparation method thereof for a kind of aging-resistant flame-proof doughnut.

The technical scheme of employing of the present invention is as follows:

A doughnut modified calcium carbonate, is characterized in that, by the feed composition of following weight part, is prepared from:

Water-ground limestone 98-100, triethyl citrate 1-2, dispersing agent NNO 0.2-0.3, Span-400.1-0.3, ferrocene 1-2, barium stearate 0.5-0.6, anti-aging agent RD 0.1-0.2,2-thiol group benzimidazolyl 0.2-0.3, linking agent TAIC0.1-0.2, super abrasion resistant carbon black N1101-2, in super wear-resisting black N2202-3, zinc borate0.1-0.3, magnesium hydroxide 0.2-0.4, γ-methacryloxypropyl trimethoxy silane 1-2.

The preparation method of modified calcium carbonate for described aging-resistant flame-proof doughnut, is characterized in that: concrete operations are:

First water-ground limestone is dried at 90-100 ℃ to moisture content below 0.5%, then add in high-speed mixer, first add in proportion triethyl citrate, under the speed of 900-1000 rev/min, high-speed stirring 3-5 minute, and then add dispersing agent NNO, Span-20, ferrocene, after high-speed stirring 4-5 minute, add successively again barium stearate, anti-aging agent RD, 2-thiol group benzimidazolyl, linking agent TAIC, after high-speed stirring 4-5 minute, add again excess of imports abrasion resistant carbon black N110, in super wear-resisting black N220, zinc borate, magnesium hydroxide, γ-methacryloxypropyl trimethoxy silane, speed high-speed stirring 15-18 minute with 1100-1200 rev/min, then dry, obtain modified calcium carbonate.

Beneficial effect of the present invention:

The present invention has added kinds of surface treatment agent and functional agent on the basis of existing water-ground limestone modification, the modified calcium carbonate of gained has particle diameter and is less than 0.1um, size of particles is even, specific surface area is large, application performance be greatly better than the feature of ordinary calcium carbonate, the modified calcium carbonate that obtains in rubber dispersiveness and consistency good, can improve the add-on of filler, reduce material cost; When modification, pass through to add a small amount of protective agent, fire retardant, anti-aging, the flame retardant properties of rubber have greatly been improved, be applied in rubber for tire production, can reduce aging dose, the consumption of fire retardant, further reduce material cost, increase economic efficiency, improved mobility and the processing characteristics of system simultaneously, and give goods good physical and mechanical properties, reach toughened and reinforced effect.

Embodiment

A preparation method for modified calcium carbonate for aging-resistant flame-proof doughnut,

By weight (kg) take water-ground limestone 100, triethyl citrate 2, dispersing agent NNO 0.2, Span-400.1, ferrocene 2, barium stearate 0.6, anti-aging agent RD 0.1,2-thiol group benzimidazolyl 0.3, linking agent TAIC0.1, super abrasion resistant carbon black N1101, in super wear-resisting black N2202, zinc borate0.2, magnesium hydroxide 0.3, γ-methacryloxypropyl trimethoxy silane 2,

First water-ground limestone is dried at 95 ℃ to moisture content below 0.5%, then add in high-speed mixer, first add in proportion triethyl citrate, under the speed of 900-1000 rev/min, high-speed stirring 3-5 minute, and then add dispersing agent NNO, Span-20, ferrocene, after high-speed stirring 4-5 minute, add successively again barium stearate, anti-aging agent RD, 2-thiol group benzimidazolyl, linking agent TAIC, after high-speed stirring 4-5 minute, then add excess of imports abrasion resistant carbon black N110, in super wear-resisting black N220, zinc borate, magnesium hydroxide, γ-methacryloxypropyl trimethoxy silane, with the speed high-speed stirring 15-18 minute of 1100-1200 rev/min, then dry, obtain modified calcium carbonate.

We add common water-ground limestone in cis-1,4-polybutadiene rubber to identical addition respectively with modified heavy calcium carbonate of the present invention, are adding other identical composition, make respectively physicals contrast that rubber vulcanization makes tire sealant as following table 1:

Table 1

Add as can be seen from Table 1 the tire sealant going out with modified calcium carbonate rubber vulcanization of the present invention, comprehensive comparison is good, and wherein heat aging performance improves much than conventional tyre glue, and elasticity obviously increases.

Claims (2)

1. an aging-resistant flame-proof doughnut modified calcium carbonate, is characterized in that, by the feed composition of following weight part, is prepared from:

Water-ground limestone 98-100, triethyl citrate 1-2, dispersing agent NNO 0.2-0.3, Span-40 0.1-0.3, ferrocene 1-2, barium stearate 0.5-0.6, anti-aging agent RD 0.1-0.2,2-thiol group benzimidazolyl 0.2-0.3, linking agent TAIC 0.1-0.2, super abrasion resistant carbon black N110 1-2, in super wear-resisting black N220 2-3, zinc borate 0.1-0.3, magnesium hydroxide 0.2-0.4, γ-methacryloxypropyl trimethoxy silane 1-2.

2. the preparation method of modified calcium carbonate for aging-resistant flame-proof doughnut according to claim 1, is characterized in that: concrete operations are:

First water-ground limestone is dried at 90-100 ℃ to moisture content below 0.5%, then add in high-speed mixer, first add in proportion triethyl citrate, under the speed of 900-1000 rev/min, high-speed stirring 3-5 minute, and then add dispersing agent NNO, Span-20, ferrocene, after high-speed stirring 4-5 minute, add successively again barium stearate, anti-aging agent RD, 2-thiol group benzimidazolyl, linking agent TAIC, after high-speed stirring 4-5 minute, add again excess of imports abrasion resistant carbon black N110, in super wear-resisting black N220, zinc borate, magnesium hydroxide, γ-methacryloxypropyl trimethoxy silane, speed high-speed stirring 15-18 minute with 1100-1200 rev/min, then dry, obtain modified calcium carbonate.