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Scorch safety improvement filling elastomer butyl rubber

An elastomer, halogenated butyl technology, used in tire tread/tread pattern, tire parts, transportation and packaging, etc.

Inactive Publication Date: 2003-06-04
LANXESS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While this solves the problem of enhancing the interaction between the elastomer and the filler, the composition must be processed carefully to prevent any undesirable scorch of the composition

Method used

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  • Scorch safety improvement filling elastomer butyl rubber
  • Scorch safety improvement filling elastomer butyl rubber
  • Scorch safety improvement filling elastomer butyl rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0045] Test Description

[0046] Wear resistance: DIN 53-516 (No. 60 emery paper)

[0047] Vulcanization rheology: RPA analysis of ASTM D 52-89 MDR2000E rheometer at 1° arc and 1.7Hz; 100°C, frequency 30cpm, strain: 0.5, 1, 2, 5, 10, 20, 50 and 90° .

[0048] Mooney scorch of compound rubber: The measurement is carried out at 135°C with a small rotor. The t03 value obtained with this small rotor is equivalent to the normally given (larger rotor) t05 value.

[0049] Stress-strain: Samples were made by vulcanizing large sheets at 170°C for tc90+5min, followed by coloring of appropriate samples. The test was carried out at 23°C.

[0050] INGREDIENTS AND GENERAL MIXING PROCEDURES DESCRIPTION

[0051] Hi-Sil  233-Silica-PPG Products

[0052] Sunpar  2280 - Paraffin oil produced by Sun Oil

[0053] Maglite  D-MgO, C.P.Hall

[0054] Bromobutyl elastomer, silica, oil, binding compound, and hydrated metal halide were mixed in a 1.57L Benbury internal tangential mixer with...

example 1

[0056] Research FeCl 3 .xH 2 O for bromobutyl rubber, HiSil  233. Maglite  The influence of the degree of reinforcement (expressed as M300 / M100 value), the degree of dispersion of silica, DIN wear resistance and scorch safety of the mixed rubber of D and ethanolamine expressed by to3 value (minutes). Contains only bromobutyl rubber, HiSi1  233 and Maglite  The compound of D was used as the control sample. All of these studied compounds used 0.5 phr sulfur, 1.5 phr zinc oxide and 1.0 phr stearic acid as the curative system.

[0057] The following FeCl 3 .xH 2 O dosage level: (i) 0phr FeCl 3 ·xH 2 O(ii) 2.4phr FeCl 3 ·xH 2 O(iii)4.8phr FeCl 3 ·xH 2 O(iv) 9.7phr FeCl 3 ·xH 2 o

[0058]All these mixes, except the control, used 2.2 phr ethanolamine as organic additive containing at least one amino group and at least one hydroxyl group.

[0059] Brominated Isoprene Isobutylene Rubber (BIIR) with additives - 60 parts per 100 parts rubber (phr) Silica filler (HiSi...

example 2

[0078] NiCl 2 .xH 2 O, CrCl 3 .xH 2 O and CoCl 2 .xH 2 O for bromobutyl rubber, HiSil  233. Maglite  The influence of D and ethanolamine on the degree of reinforcement (expressed in M300 / M100 value), the degree of dispersion of silica, DIN wear resistance and scorch safety (expressed in minutes of t03 time). Contains only bromobutyl rubber, HiSil  233. Maglite  The rubber compound of D and monoethanolamine is used as a control example. All the compounds studied used a mixture of 0.5 phr sulfur, 1.5 phr zinc oxide and 1.0 phr stearic acid as the curative system.

[0079] The following hydrated metal halide levels were investigated: (i) 0 phr (control) (ii) 8.5 phr NiCl 2 ·xH 2 O(iii)9.6phr CrCl 3 ·xH 2 O(iv) 8.6phr CoCl 2 ·xH 2 o

[0080] All of these mixes used 2.2 phr ethanolamine as organic additive containing at least one amino group and at least one hydroxyl group.

[0081] Brominated Isoprene Isobutylene Rubber (BIIR) with additives - 60 parts per 100...

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PUM

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Abstract

The invention provides a process for preparing a filled halobutyl elastome r, which comprises mixing a halobutyl elastomer, particles of filler an additiv e containing both amino and alcohol functional groups, and one or more hydrated metal halogenides and optional curing the filled elastomer with sulfur or other curative systems. Those compositions have improved properties when compared to known carbon black-filled halobutyl elastomeric compositions combined with an enhanced scorch safety. This invention has the advantages of (a) not evolving alcohol either during the manufacture or subsequent use of the article manufactured from the compound, and (b) maintaining good processability of the compound.

Description

technical field [0001] The present invention relates to a halobutyl elastomer having improved scorch safety, in particular a brominated butyl elastomer having improved scorch safety. Background technique [0002] Reinforcing fillers such as carbon black and silica are known to greatly improve the strength and fatigue properties of elastomeric compounds. It is also known that a chemical interaction occurs between the elastomer and the filler. For example, the favorable interaction between carbon black and highly unsaturated elastomers such as polybutadiene (BR) and styrene-butadiene copolymer (SBR) is due to the presence of a large number of carbon-carbon double bonds in such in the copolymer. Butyl elastomers may only have 1 / 10 or less carbon-carbon double bonds as in BR or SBR, so compounds made from butyl elastomers are known to interact weakly with carbon black. For example, preparing a mix by mixing carbon black with a BR-butyl elastomer combination results in BR doma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08F8/20C08K3/16C08K5/16C08K5/17C08L15/02
CPCC08K3/16C08K5/17C08L23/28C08F8/20
Inventor R·雷森德斯W·霍普金斯
Owner LANXESS INC