Unlock instant, AI-driven research and patent intelligence for your innovation.

Isobutylene based elastomer blends having improved strength, elasticity, and reduced permeability

An isobutylene-based, random copolymer technology, applied in the direction of no separate air cushions, household appliances, other household appliances, etc., can solve the comprehensive supplementary method that does not propose the strength performance of the rubber compound, isobutylene rubber or its blend glue Material strength has not been greatly improved and other issues

Inactive Publication Date: 2003-09-03
EXXON CHEM PAT INC
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the compound strength of isobutylene rubber or its blends has not been greatly improved
[0009] The prior art has not proposed a comprehensive supplementary method for the strength properties of the compound

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A series of mixtures based on either one of four bromobutyl rubbers (#1-4) or two bromobutyl rubbers in combination with existing (#5 ~18) Blends of semi-crystalline polymers, or with non-crystalline polymers (an EPDM rubber, VISTALON 2200®, molecular weight less than or equal to 33, represented by Mooney viscosity ML (1+4) at 125°C. This The test method of Mooney viscosity in the invention refers to ASTM D-1646) (commercially available from Exxon Chemical Company, Baytown, Texas), commonly used inner tube blends, #19~20)), or blends with natural Blend of rubber (#21). SCP was fed at either 15 pounds per hour (phr) or 20 phr, amorphous polymer was added at 20 phr, and NR was introduced at 25 phr, as shown in Table 1. The oil feed rate was 0, 5 or 10 lb / hr and the carbon black feed rate was 60, 70 or 80 lb / hr.

[0053] The vulcanization systems shown in Table 1 were charged to an open mill.

[0054] The compound properties of the compounds without curing system compon...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melting pointaaaaaaaaaa
enthalpy of fusionaaaaaaaaaa
enthalpy of fusionaaaaaaaaaa
Login to View More

Abstract

The improved green strength, green elongation, and green relaxation properties of isobutylene based elastomers at elevated temperatures along with improved aging and barrier properties are achieved by blending semi-compatible, semi-crystalline polymers with the isobutylene elastomers. The improved properties are maintained in subsequent rubber compounds containing said blends and are particularly useful in tire and pharmaceutical container applications.

Description

technical field [0001] This invention relates to isobutylene-based polymers (IBP), particularly halogenated isobutylene-based polymers, and more particularly to bromobutyl rubbers with improved compound strength and improved impermeability and methods for their preparation. Background of the invention [0002] Isobutylene-based polymers have been blended with a large number of compositions such as natural rubber for the purpose of improving various properties such as elasticity, strength, gas impermeability, etc. Natural rubber (NR) is known to crystallize upon elongation and natural rubber is known to have a very high molecular weight fraction, both of which contribute to its compound properties. This property is important in the preparation of rubber articles from unvulcanized rubber, especially composite materials such as tires, but may be important in extruded products such as inner tubes and molded articles such as medical stoppers. Isobutylene based polymers are there...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B60C5/00B29D30/04B60C1/00B60C5/14C08F8/20C08F210/10C08J3/20C08J5/18C08L3/04C08L23/08C08L23/10C08L23/14C08L23/16C08L23/18C08L23/20C08L23/22C08L23/28C08L101/12
CPCC08L23/142C08L23/0815C08L23/14C08L23/16C08L23/283C08F210/10C08L23/18C08F8/20B60C1/0008C08L23/22C08L2314/06C08L2666/04C08F212/00C08F210/06C08J5/18
Inventor H-C·王I·杜德瓦尼S·达塔C·R·钱
Owner EXXON CHEM PAT INC
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com