EP0345594A2
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Method for improving properties of vulcanized rubber containing inorganic whity filler
Assignee: Sumitomo Chemical Co Ltd
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Filing: 1989-05-29
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Granted: —
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Expires: 2009-05-29
Abstract
Abstract Rubber filled with an inorganic whity filler such as white carbon is improved in its vulcanized rubber properties such as tensile strength, tear strength and heat build-up resistance by incorporating thereto a dinitrodiamine compound represented by the formula of <CHEM> wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R<1> is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R<1> when both X and R<1> are the aliphatic groups, and R<2> and R<3> independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R<2> and R<3> may conjointly form a ring. The dinitrodiamine compound acts as a coupling agent for the rubber and the inorganic whity filler.
Inventors
- 👤 Isao Kurimoto
- 👤 Naoki Inui
- 👤 Tetsuo Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 11:48
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/16; C08K5/32
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
130 words
A method for improving properties of vulcanized rubber containing an inorganic whity filler which comprises blending a natural and/or synthetic rubber with an inorganic whity filler selected from white carbon, talc and clay, and a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring.
Claim 2
Independent Claim
130 words
A method for improving properties of vulcanized rubber containing an inorganic whity filler which comprises blending a natural and/or synthetic rubber with an inorganic whity filler selected from white carbon, talc and clay, and a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring.
Claim 3
Dependent Claim
15 words
The method according to Claim 1, wherein the rubber is further blended with carbon black.
Claim 4
Dependent Claim
14 words
The method according to Claim 1, wherein the inorganic whity filler is white carbon.
Claim 5
Dependent Claim
26 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where X is a divalent aliphatic group of 1 to 18 carbon atoms.
Claim 6
Dependent Claim
19 words
The method according to Claim 4, wherein X is a divalent aliphatic group of 4 to 12 carbon atoms.
Claim 7
Dependent Claim
17 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where X is cyclohexylene,
Claim 8
Dependent Claim
22 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where X is phenylene unsubstituted or substituted, or naphthylene.
Claim 9
Dependent Claim
28 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where R¹ is hydrogen, an alkyl of 1 to 6 carbon atoms, cyclohexyl or phenyl.
Claim 10
Dependent Claim
10 words
The method according to Claim 8, wherein R¹ is hydrogen.
Claim 11
Dependent Claim
25 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where X, R¹ and two nitrogen atoms conjointly form a ring of
Claim 12
Dependent Claim
28 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where one of R¹ and R² is an alkyl of 1 to 12 carbon atoms.
Claim 13
Dependent Claim
13 words
The method according to Claim 11, wherein R² and R³ are both methyl.
Claim 14
Dependent Claim
29 words
The method according to Claim 1, wherein the dinitrodiamine compound is the one where R² and R³ together with a carbon atom bonding thereto conjointly form a six-membered ring.
Claim 15
Dependent Claim
30 words
The method according to Claim 1, wherein the dinitrodiamine compound is used in an amount of 0.1 to 10 parts by weight per 100 parts by weight of the rubber.
Claim 16
Dependent Claim
15 words
The method according to Claim 1, wherein the rubber is further blended with an anti-adsorbent.
Claim 17
Dependent Claim
11 words
The method according to Claim 15, wherein the anti-adsorbent is triethanolamine.
Claim 18
Independent Claim
122 words
A method for coupling a rubber and an inorganic whity filler which comprises blending the rubber and the inorganic whity filler with a coupling agent comprising a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring.
Claim 19
Independent Claim
122 words
A method for coupling a rubber and an inorganic whity filler which comprises blending the rubber and the inorganic whity filler with a coupling agent comprising a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring.
Claim 20
Dependent Claim
29 words
The method according to Claim 17, wherein the rubber is further blended with carbon black, and the coupling agent acts further to couple the rubber and the carbon black.
Claim 21
Dependent Claim
119 words
A rubber composition comprising a natural and/or synthetic rubber, carbon black, an inorganic whity filler selected from white carbon, talc and clay, and a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring.
Claim 22
Dependent Claim
119 words
A rubber composition comprising a natural and/or synthetic rubber, carbon black, an inorganic whity filler selected from white carbon, talc and clay, and a dinitrodiamine compound represented by the formula of wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R¹ is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R¹ when both X and R¹ are the aliphatic groups, and R² and R³ independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R² and R³ may conjointly form a ring.
Claim 23
Dependent Claim
15 words
The rubber composition according to Claim 19, wherein the inorganic whity filler is white carbon.
References Cited (Backward Citations)
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