CN101092517A

CN101092517A - Rubber protective agent

Info

Publication number: CN101092517A
Application number: CN 200710011742
Authority: CN
Inventors: 金京
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-18
Filing date: 2007-06-18
Publication date: 2007-12-26
Anticipated expiration: 2027-06-18
Also published as: CN100590147C

Abstract

This invention discloses a rubber anti-aging agent, which comprises: low-melting-point paraffin 16-36 wt.%, high-melting-point paraffin 32-44 wt.%, microcrystalline petroleum wax 20-36 wt.%, EVA polymer 0.5-3 wt.%, synthetic polyethylene wax 1-3 wt.%, cationic surfactant 2-5 wt.%, and antioxidant 1-3 wt.%. The rubber anti-aging agent has ideal protection effect and protection life in a wide temperature range. The EVA polymer can control the melt viscosity of the rubber anti-aging agent, and improve its toughness and softness. The antioxidant can retard the oxidation process of the rubber anti-aging agent, improve its anti-ozone ability, and prolong its protection life. The cationic surfactant can make the rubber anti-aging agent have high adhesion and permeation performance, as well as high antistatic performance, and improve the ground friction of rubber tyres.

Description

Rubber protecting agent

Technical field

The present invention relates to chemical technology field, particularly a kind of rubber protecting agent that is used to prevent various rubber item be full of cracks, aged physical.

Background technology

The widespread use of rubber item impels rubber industry to be able to high speed development, in order to prolong the life-span of rubber item, prevent that rubber item is chapped by the comprehensive action of sunlight and all gases factor under the natural weather condition, catabiosis, generally need in rubber item, to add and prevent aged chemistry and physical antioxidant, the physical anti-aging agent is mainly made with the wax based article, wax class anti-aging agent is because its composition, the difference of component, with have different mutual capacitives after the rubber mixing of materials, thereby wax class anti-aging agent there is normal paraffin, the requirement of isoparaffin content and carbon number distribution, Wax is added in the rubber, its content is during greater than the mutual appearance limit under use temperature, the Wax that can not hold mutually will move, be distributed to rubber article, thereby form one deck inertia in rubber article, no crystallization, the toughness film of strong adhesion, this layer film can play the screen rubber product surface, it is not directly contacted with air, reduce or stop to take place chemistry, physical action, this specific character of Wax extensively is used to prevent the rubber article be full of cracks by people, efflorescence, aging, rubber protecting agent is promptly given birth to therefrom.Though Wax has protective effect to rubber, play protective effect with making the rubber protecting agent high quality and high efficiency, its other performance is also had certain requirement: protective agent adds the travelling speed that must have in the rubber in the certain temperature range to; Will form certain thickness protective membrane after moving to rubber surface, this layer protective membrane will have certain sticking power and toughness; This tunic will have certain compactness and density, does not have the slit; This tunic should have static electricity resistance and certain high temperature resistance, in order to make rubber protecting agent have these performances, protective agent will have suitable material component, and in the protective agent just, the content of isoparaffin and carbon number distribution also will suit, normal paraffin and rubbery interpolymer capacitive are good, mutual capacity is big at a certain temperature, owing to be the straight chain shape, unprotected side chain carbochain resistance, therefore its travelling speed is fast, the migration amount is big, and the film of formation is also just thicker, but n-alkane crystallization is bigger, thereby the short texture of the film that forms, compactness and snappiness are poor, and sticking power is also bad, easily comes off at short notice, reduce protection effect, isoparaffin is because the molecular structure collateralization easily forms crisscross tangleweed, and mutual capacitive relative and rubber is low.Its travelling speed is because side chain resistance difference and travelling speed is also slow, different, but the crystallization of isoparaffin is less, the film density that forms, the snappiness of compactness and film is better, protective to rubber article is better, so just by the modulation rubber protecting agent, the content of isomery protective embankment hydrocarbon and the carbon number distribution structure of alkane, add some additives and just can make ideal wax class preventing rubber goods, at present, the various rubber protecting agents that use on the market all have certain protection effect, but generally depositing the incomplete defective of performance, United States Patent (USP) (US4877456 for example, US5296129) a kind of rubber protecting agent is disclosed, because normal paraffin content is more, one or more isoparaffins are too concentrated, and travelling speed is fast, amount is big, manually can not effectively control the migration amount of alkane in the wide temperature range, the protection thickness that forms, film properties is bad, does not have antistatic effect, and these defectives make and require long high-quality rubber item of protection life-span can not reach the ideal effect.

Summary of the invention

The purpose of this invention is to provide a kind of protective film good toughness in rubber surface strong adhesion, formation, the compactness height, the protection life-span is long, has antistatic effect, the physical wax class rubber protecting agent that tire and rubber item use under comparatively high temps.

The present invention is achieved in that and it is characterized in that contained composition and weight percent are: low melt point paraffin 16～36%; Inspissated wax 32～44%; Oil Microcrystalline Wax 20～36%; EVA polymkeric substance 0.5～3%; Synthetic polyethylene waxes 1～3%; Cats product 2～5%; Oxidation inhibitor 1～3%.

The present invention contains normal paraffin, and isoparaffin content and alkane carbon number distribution have ideal protection effect and protection life-span in wide temperature range, select for use the EVA polymkeric substance can control the melt viscosity of protective agent, strengthen toughness and flexibility; Use oxidation inhibitor can delay the oxidising process of protective agent, strengthens the anti-ozone ageing usefulness of protective agent, increases the protection life-span of protective agent; Add cats product and can make protective agent that good tack and seepage force are arranged, and make protective film have antistatic property, the earth-catching property when increasing tire running, every index of product of the present invention detects as follows;

Table 1: the physical and chemical index of rubber protecting agent

Sample	100 ℃ of mPa.s of melt viscosity	Melt drop temperature ℃	100 ℃ of refractive indexs
Sample	100 ℃ of mPa.s of melt viscosity	Melt drop temperature ℃	100 ℃ of refractive indexs	Embodiment 1	8.5～9.0	65.5	1.425
Embodiment 2	9.0～9.5	60.0	1.435	Embodiment 1	8.5～9.0	65.5	1.425
Embodiment 2	9.0～9.5	60.0	1.435	Embodiment 3	8.0～8.5	70.0	1.440
Embodiment 4	9.0～9.5	68.0	1.450	Embodiment 3	8.0～8.5	70.0	1.440

The melt viscosity of this invention sample is suitable as can be seen by the data of table 1, and melt drop temperature, refractive index are suitable.

Table 2: the application result of rubber protecting agent

Sample	Pull apart powerful mPa	Tensile yield %	300% stress at definite elongation mPa.s	500% stress at definite elongation mPa.s
Sample	Pull apart powerful mPa	Tensile yield %	300% stress at definite elongation mPa.s	500% stress at definite elongation mPa.s	Blank	26.0	720	14.3	5.8
No. 58 paraffin	24.5	732	13.6	4.8	Blank	26.0	720	14.3	5.8
No. 58 paraffin	24.5	732	13.6	4.8	Germany's 654 waxes	25.0	768	12.9	4.6
Embodiment 1	24.2	771	12.2	4.4	Germany's 654 waxes	25.0	768	12.9	4.6
Embodiment 1	24.2	771	12.2	4.4	Embodiment 2	24.0	760	12.0	4.3
Embodiment 3	23.9	780	11.8	4.5	Embodiment 2	24.0	760	12.0	4.3
Embodiment 3	23.9	780	11.8	4.5	Embodiment 4	24.8	776	12.0	4.2

Show result preferably by table 2 data sample physics and chemistry of the present invention as can be seen test-results.

Table 3: colloid Weather test

Sample	The appearance surface crack time (my god)
Sample	The appearance surface crack time (my god)	Blank	10
No. 58 paraffin	18	Blank	10
No. 58 paraffin	18	Germany's 654 waxes	88
Embodiment 1	98	Germany's 654 waxes	88
Embodiment 1	98	Embodiment 2	99
Embodiment 3	99	Embodiment 2	99
Embodiment 3	99	Embodiment 4	100

Embodiment

Embodiment 1

Take by weighing No. 52 17 kilograms of low melt point paraffins (Fushun oil one factory) according to quantity, No. 66 44 kilograms of inspissated waxs (Dalian Petrochemical Industry Company), No. 80 31 kilograms of oil Microcrystalline Waxes (Jingmen petro-chemical corporation), 3 kilograms of EVA polymkeric substance (Mitsui 220ET), 1 kilogram of synthetic polyethylene waxes (Beijing Organic Chemical Plant), 3 kilograms of cats products (lauryl amine), 1 kilogram (2 in oxidation inhibitor, 6_ tertiary butyl p-cresol), press proportioning earlier with paraffin, Microcrystalline Wax joins in the stainless steel reactor, slowly be heated to 100 ± 5 ℃, after treating whole material fusions, stir and add the EVA polymkeric substance, synthetic polyethylene waxes, cats product and oxidation inhibitor, stirred constant 20 minutes, after filtering shaping is handled, promptly be a kind of rubber protecting agent of the present invention, the low melt point paraffin among the embodiment 1 is meant 50～No. 60 paraffin (oleaginousness is less than 2%), or their mixture; Inspissated wax is meant 62～No. 70 paraffin (oleaginousness is less than 2%), or their mixture; The oil Microcrystalline Wax is meant 75～No. 85 paraffin (oleaginousness is less than 3.5%), or their mixture, the EVA polymkeric substance is meant VA content 18～28%, melting index: 7～530g/10min (190 ℃), synthetic polyethylene waxes is meant molecular weight 5000～15000, homopolymerization type or copoly type gather wax, or their mixture; Oxidation inhibitor is meant 2,6_ tertiary butyl p-cresol; Cats product is meant lauryl amine or octadecylamine, or their mixture.

Embodiment 2

Take by weighing No. 54 20 kilograms of low melt point paraffins (Fushun oil one factory) according to quantity, No. 64 38 kilograms of inspissated waxs (Dalian Petrochemical Industry Company), No. 85 36 kilograms of oil Microcrystalline Waxes (Jingmen petro-chemical corporation), 2 kilograms in EVA polymkeric substance (Mitsui 220ET), 1.5 kilograms of synthetic polyethylene waxes (Beijing Organic Chemical Plant 913), 1 kilogram of cats product (octadecylamine), 1.5 kilogram (2 in oxidation inhibitor, 6_ tertiary butyl p-cresol), press proportioning earlier with paraffin, Microcrystalline Wax joins in the stainless steel reactor, slowly be heated to 100 ± 5 ℃, after treating whole material fusions, stir and add the EVA polymkeric substance, synthetic polyethylene waxes, cats product and oxidation inhibitor, stirred constant 20 minutes, filtering shaping promptly is a kind of rubber protecting agent of the present invention after handling.

Embodiment 3

Take by weighing No. 56 26 kilograms of low melt point paraffins (Fushun oil one factory) according to quantity, No. 62 44 kilograms of inspissated waxs (Dalian Petrochemical Industry Company), No. 85 20 kilograms of oil Microcrystalline Waxes (Jingmen petro-chemical corporation), 3 kilograms of EVA polymkeric substance (Mitsui 220ET), 2 kilograms of synthetic polyethylene waxes (Beijing Organic Chemical Plant 913), 4 kilograms of cats products (octadecylamine), 1 kilogram (2 in oxidation inhibitor, 6_ tertiary butyl p-cresol), press proportioning earlier with paraffin, Microcrystalline Wax joins in the stainless steel reactor, slowly be heated to 100 ± 5 ℃, after treating whole material fusions, stir and add the EVA polymkeric substance, synthetic polyethylene waxes, cats product and oxidation inhibitor, stirred constant 20 minutes, filtering shaping promptly is a kind of rubber protecting agent of the present invention after handling.

Embodiment 4

Take by weighing No. 52 36 kilograms of low melt point paraffins (Fushun oil one factory) according to quantity, No. 62 20 kilograms of inspissated waxs (Dalian Petrochemical Industry Company), No. 60 10 kilograms of high-smelting point petroleum waxes (Fushun second branch factory of oil), No. 80 26 kilograms of oil Microcrystalline Waxes (Nanyang petro-chemical corporation), 2 kilograms in EVA polymkeric substance (Mitsui 18150), 3 kilograms of synthetic polyethylene waxes (Beijing Organic Chemical Plant 913), 1 kilogram of cats product (octadecylamine), 2 kilogram (2 in oxidation inhibitor, 6 tertiary butyl p-cresol), press proportioning earlier with paraffin, Microcrystalline Wax joins in the stainless steel reactor, slowly be heated to 100 ± 5 ℃, after treating whole material fusions, stir adding EVA polymkeric substance, synthetic polyethylene waxes, cats product and oxidation inhibitor stirred constant 20 minutes, filtering shaping promptly is a kind of rubber protecting agent of the present invention after handling.

Claims

1, a kind of rubber protecting agent is characterized in that contained composition and weight percent are: low melt point paraffin 16～36%; Inspissated wax 32～44%; Oil Microcrystalline Wax 20～36%; EVA polymkeric substance 0.5～3%; Synthetic polyethylene waxes 1～3%; Cats product 2～5%; Oxidation inhibitor 1～3%.

2, according to claim 1 described rubber protecting agent, feature is that described low melt point paraffin is 50～No. 60 paraffin (oleaginousness is less than 2%), or their mixture.

3, according to claim 1 described rubber protecting agent, feature is that described inspissated wax is 62～No. 70 paraffin (oleaginousness is less than 2%), or their mixture.

4, according to claim 1 described rubber protecting agent, feature is that described oil Microcrystalline Wax is 75～No. 85 paraffin (oleaginousness is less than 3.5%), or their mixture.

5, according to claim 1 described rubber protecting agent, feature is that described EVA polymkeric substance is a VA content 18～28%, and melting index is 7～530g/10min (190 ℃).

6, according to claim 1 described rubber protecting agent, feature is that described synthetic polyethylene waxes is that molecular weight is 5000～15000, and homopolymerization type or copoly type gather wax, or their mixture.

7, according to claim 1 described rubber protecting agent, feature is that described oxidation inhibitor is 2,6 tertiary butyl p-cresol.

8, according to claim 1 described rubber protecting agent, feature is that described cats product is lauryl amine or octadecylamine, or their mixture.