CN102690449B - Modified rubber containing rubber composition for pneumatic tyres - Google Patents

Abstract

The invention relates to the field of rubber techniques, and in particular relates to a modified rubber containing rubber composition for pneumatic tyres. The rubber composition is characterized in that through taking 100 parts by weight of rubber component as reference, the rubber composition also comprises 60 parts by weight of carbon black or silica or a mixture of the two in arbitrary proportion, 0.5-5 parts by weight of zinc oxide, 0.5-5 parts by weight of a stearic acid, 0.5-5 parts by weight of sulfur, 0.5-5 parts by weight of an accelerator, and 5-30 parts by weight of sulfhydryl end-capped siloxane (which can be prepared by reacting halogenated siloxane with hydrosulfides), or 5-30 parts by weight of sulfhydryl end-capped polysiloxane (which can be prepared by reacting halogenated silane end-capped polysiloxane with hydrosulfides) or 5-30 parts by weight of sulfhydryl end-capped polyamide (which can be prepared by reacting halogen atom end-capped polyamide with hydrosulfides), wherein the rubber component is a mixture of one or two or three of natural rubber, butylbenzene rubber and butadiene rubber in arbitrary proportion.

Description

Pneumatic tyre rubber combination containing modified rubber

Technical field

The present invention relates to rubber technology field, specifically a kind of pneumatic tyre rubber combination containing modified rubber.

Background technology

As everyone knows, wear-resisting, anti-slippery and low roll resistance be the large feature of high-performance tire prerequisite three.But due to the structural limitations of material itself, it is very difficult reaching above three kinds of performances on material property simultaneously.Want to solve the problem of " devil's triangle " that tyre industry exists, need to carry out new structure design or chemical modification to current material.The molecular chain modification of rubber has epoxidation modification and halogenation modification etc.These modified-reactions need to carry out with rubber latex in solvent, and prepared modified rubber can be for compounding rubber.In rubber mixing process, the direct method of using functionalization monomer to carry out modification is less.The silicone compounds such as the Si-69 being wherein applied along with the application of white carbon black and Si-75 in mixing process with rubber molecular chain and white carbon black acting in conjunction, belong to the graft modification to rubber molecular chain.Gained cross-linked rubber mechanical property is lower, prepared tire wear, the anti-slippery and low resistance poor-performing that rolls.

Summary of the invention

Object of the present invention is exactly in order to overcome above-mentioned the deficiencies in the prior art, and a kind of pneumatic tyre rubber combination containing modified rubber is provided, and gained cross-linked rubber has higher mechanical property, and prepared tire has higher wear-resisting, anti-slippery and lowly roll resistive energy.

The technical scheme that the present invention solves the problems of the technologies described above employing is: a kind of pneumatic tyre rubber combination containing modified rubber,

The rubber components of 100 weight parts of take is benchmark, also comprises

The carbon black or silicon-dioxide or the arbitrary proportion mixture of the two that also comprise 60 weight parts,

0.5～5 part by weight of zinc oxide,

0.5～5 weight part stearic acid,

0.5～5 weight part sulphur,

0.5～5 weight part promotor,

The siloxanes of 5～30 parts of sulfydryl end-blockings, wherein the silane of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by halo siloxanes; Or the polysiloxane of 5～30 parts of sulfydryl end-blockings, polysiloxane can react preparation with sulphur hydrogen salt by the polysiloxane of halogenated silanes end-blocking; Or the polymeric amide of 5～30 parts of sulfydryl end-blockings, wherein the polymeric amide of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by the polymeric amide of halogen atom end-blocking;

Wherein said rubber components is a kind of in natural rubber, styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber or the arbitrary proportion mixture of two kinds or three kinds wherein.

The invention has the beneficial effects as follows, compound and the polymkeric substance of application sulfydryl end-blocking carry out the modification of mix stage to rubber, modified effect is good, and on the not impact of existing production technique, prepared rubber unvulcanizate has higher wear resisting property, wet-sliding resistant performance and lowly rolls resistive energy.

Embodiment

Below in conjunction with embodiment, the invention will be further described:

The present invention relates to a kind of rubber combination that contains modified rubber: rubber components is a kind of in natural rubber, styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber or the arbitrary proportion mixture of two kinds or three kinds wherein; The rubber components of 100 weight parts of take is benchmark, also comprises carbon black, silicon-dioxide or the arbitrary proportion mixture of the two of 60 weight amount parts; 0.5～5 part by weight of zinc oxide; 0.5～5 weight part stearic acid; 0.5～5 weight part sulphur; 0.5～5 weight part promotor; The 100 parts by weight of rubber components of take are benchmark, the monomer that also comprises graft reaction: the siloxanes of 5～30 weight part sulfydryl end-blockings, wherein the siloxanes of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by halo siloxanes, or the polysiloxane of 5～30 weight part sulfydryl end-blockings, polysiloxane can react preparation with sulphur hydrogen salt by the polysiloxane of halogenated silanes end-blocking, or the polymeric amide of 5～30 weight part sulfydryl end-blockings, wherein the polymeric amide of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by the polymeric amide of halogen atom end-blocking.The monomer of graft reaction can first react with natural rubber, styrene-butadiene rubber(SBR) or cis-1,4-polybutadiene rubber in advance, makes rubber master batch mixing together with auxiliary agent with rubber again, obtains the final pneumatic tyre rubber that contains modified rubber.

Embodiment

Table one: invention formula coordinates table (the content unit of each raw material: weight part)

Formula number	Comparative example	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Embodiment 6	Embodiment 7
									Natural rubber	100	100	?	?	80	40	20	?
Styrene-butadiene rubber(SBR)	?	?	100	?	20	40	?	40
									Cis-1,4-polybutadiene rubber	?	?	?	100	?	20	80	60
Carbon black	60	60	20	?	40	20	40	20
									Silicon-dioxide	?	?	40	60	20	40	20	40
Zinc oxide	3	3	0.5	3	3	4	3	5
									Stearic acid	2	2	0.5	0.5	5	2	2	2
Sulphur	1.5	1.5	1.5	0.5	5	1.5	3.5	1.5
									Promotor	1.5	1.5	0.5	1.5	5	1.5	1.5	1.5
The siloxanes of sulfydryl end-blocking	?	5	10	30	?	?	?	?
									The polysiloxane of sulfydryl end-blocking	?	?	?	?	5	30	?	?
The polymeric amide of sulfydryl end-blocking	?	?	?	?	?	?	5	30

Table two: formula physicals table

Project	Comparative example	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Embodiment 5	Embodiment 6	Embodiment 7
									Tensile strength (MPa)	25	25	14	18	25	22	14	16
Tensile yield (%)	650	600	500	600	600	600	620	600
									Stress at definite elongation (MPa)	12	12	8	7	12	12	8	9
Wear index	140	140	150	150	140	140	150	155
									tanδ(0 oC)	0.45	0.4	0.6	0.5	0.6	0.6	0.6	0.7
tanδ(60 oC)	0.30	0.25	0.15	0.20	0.25	0.30	0.15	0.20

Claims (1)

1. containing a pneumatic tyre rubber combination for modified rubber, it is characterized in that:

The rubber components of 100 weight parts of take is benchmark, also comprises

The carbon black or silicon-dioxide or the arbitrary proportion mixture of the two that also comprise 60 weight parts,

0.5 ~ 5 part by weight of zinc oxide,

0.5 ~ 5 weight part stearic acid,

0.5 ~ 5 weight part sulphur,

0.5 ~ 5 weight part promotor,

The siloxanes of 5 ~ 30 parts of sulfydryl end-blockings, wherein the siloxanes of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by halo siloxanes,

Or the polysiloxane of 5 ~ 30 parts of sulfydryl end-blockings, the polysiloxane of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by the polysiloxane of halogenated silanes end-blocking,

Or the polymeric amide of 5 ~ 30 parts of sulfydryl end-blockings, wherein the polymeric amide of sulfydryl end-blocking can react preparation with sulphur hydrogen salt by the polymeric amide of halogen atom end-blocking;

Wherein said rubber components is a kind of in natural rubber, styrene-butadiene rubber(SBR), cis-1,4-polybutadiene rubber or the arbitrary proportion mixture of two kinds or three kinds wherein.