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

Gels derived from extending grafted centipede polymers and polypropylene

a technology of which is applied in the field of gels derived from centipede polymer and polypropylene, can solve the problems of high interfacial tension, difficult or even impossible in practice to achieve many potential combinations through simple blending, and achieve high damping and soft materials

Inactive Publication Date: 2001-10-25
BRIDGESTONE CORP
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006] Accordingly, it is an object of this invention to provide an oil or low molecular weight component extended grafted "centipede" polymer of a maleated polypropylene and a poly(alkenyl benzene-co-maleimide) that is useful in producing high damping and soft materials.

Problems solved by technology

However, it may be difficult or even impossible in practice to achieve many potential combinations through simple blending because of some inherent and fundamental problem.
Frequently, the two polymers are thermodynamically immiscible, which precludes generating a truly homogeneous product.
However, the situation at the interface between these two phases very often does lead to problems.
The typical case is one of high interfacial tension and poor adhesion between the two phases.
This interfacial tension contributes, along with high viscosities, to the inherent difficulty of imparting the desired degree of dispersion to random mixtures and to their subsequent lack of stability, giving rise to gross separation or stratification during later processing or use.
Poor adhesion leads, in part, to the very weak and brittle mechanical behavior often observed in dispersed blends and may render some highly structured morphologies impossible.

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

example 2

Grafting of the Centipede Polymer and Maleated Polypropylene

[0078] A nitrogen purged Brabender mixer (.about.310 g capacity) equipped with a Banbury blade was initially set to 60 rpm and 195.degree. C. The mixer was then charged with 36.6 g of commercial maleated poypropylene (from the Exxon Chemical Company, trade name Exxelor PO 1015). After 6 minutes, a charge of 145 g of the centipede polymer product of Example 1 was added to the mixer. The polymers were agitated for an additional 10 minutes. A charge of 1.6 g of dodecane diamine (from Aldrich, purity=98%) was then added, and at the same time the agitation speed was readjusted to 120 rpm. After 6 minutes the torque of the mixer increased and the agitation speed was again readjusted to 60 rpm. After an addition mixing at 60 rpm for 8 minutes, the heating element of the mixer was turned off and the agitation speed was again readjusted to 40 rpm. The mixture was permitted to cool to about 160.degree. C. at a rate of .about.4.degree...

example 3

[0079] A charge of 15 g of the grafted polymer product of Example 2 was added to a Brabender mixer (50 g capacity) equipped with a roller blade. The mixer was initially set to 50.degree. C. and 20 rpm. A charge of 17.7 g of di(tridecyl)phthalate (DTDP) oil was slowly added to the contents of the mixer. After 5 minutes, the temperature of the mixer was reset to 160.degree. C. and the agitation speed was reset to 70 rpm. After 105 minutes of continuous mixing, another charge of 17.8 g of DTDP oil was added to the contents of the mixer. The material was then further mixed for 35 minutes at 90 rpm. The agitation was then discontinued and the product was removed from the mixer.

example 4

[0080] A charge of 15 g of the grafted polymer product of Example 2 was added to a Brabender mixer (50 g capacity) equipped with a roller blade. The mixer was initially set to 80.degree. C. and 20 rpm. A charge of 17.7 g of DTDP oil was slowly added to the contents of the mixer. After 8 minutes, the temperature of the mixer was reset to 160.degree. C. amd the agitation speed was reset to 90 rpm. After 12 minutes an additional two grams of the grafted polymer product of Example 2 was added to the contents of the mixer. After 108 minutes of continuous mixing, a charge of 17.8 g of trioctyl phosphate (TOP) oil was added to the contents of the mixer. The material was then further mixed for 195 minutes at 90 rpm. The agitation was then discontinued and the product was removed from the mixer.

[0081] The products were thereafter molded into sheets and cylinder buttons at .about.155.degree. C. Ring samples were cut from these sheet for tensile measurements. The details of their physical prop...

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
wt %aaaaaaaaaa
wt %aaaaaaaaaa
temperatureaaaaaaaaaa
Login to View More

Abstract

The present invention teaches a method for enabling the formation of a high damping, soft polymer gel. The method includes: reacting a poly(alkenyl benzene-co-maleimide) polymer with a maleated polyalkylene and an alkyl diamine under substantially dry conditions sufficient to form a polyalkylene grafted poly(alkenyl benzene-co-maleimide) polymer product; and, dispersing the polyalkylene grafted poly(alkenyl benzene-co-maleimide) polymer product with an extender oil sufficient to form the gel. The present invention also contemplates a polymer gel composition, a polymer composition and an article manufactured from the polymer gel composition.

Description

[0001] This invention relates to the production of polyalkylene grafted poly(alkenyl benzene-co-maleimide) polymers and to the use of such polymers when oil extended in producing high damping, soft materials.[0002] The polymerization of styrene and maleic anhydride by free radical initiation is well known in the prior art. Similarly, poly(styrene-co-maleic anhydride) polymer is well known. Further, imidization between a maleic anhydride and a primary amine group is a commonly known chemical reaction. Patent publications which have recognized these reactions include: German Patent DE 4241538, assigned to Leuna-Werke A.-G; Japanese Patent JP 94248017, assigned to Monsanto Kasel Kk.; and, Italian Patent EP 322905 A2, assigned to Montedipe S.p.A Various other non-patent publications have also recognized these reactions. Included among them are: L. E. Colleman, Jr., J. F. Bork, and H. Donn, Jr., J. Org. Chem., 24, 185(1959); A Matsumoto, Y. Oki, and T. Otsu, Polymer J., 23 (3), 201(1991)...

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 Applications(United States)
IPC IPC(8): C08F8/32C08G73/00C08G81/02C08F257/00
CPCC08F8/32C08G81/021
Inventor WANG, XIAORONGFOLTZ, VICTOR J.MATSUSE, TAKAHIROMASHITA, NARUHIKOTOYOSAWA, SHINICHI
Owner BRIDGESTONE CORP