Dorothy C Prem from Northfield, OH

Impact Improvement Of High Nitrile Resins
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US Patent:

44502540, May 22, 1984
Filed:

Jun 25, 1982
Appl. No.:

6/392392
Inventors:

Ralph E. Isley - Northfield OH
Dorothy C. Prem - Sagamore Hills OH
June T. Duke - Chagrin Falls OH
Assignee:

Standard Oil Company - Cleveland OH
International Classification:

C08K 509
US Classification:

524399
Abstract:

The impact resistance of high nitrile thermoplastic resins is greatly improved by including metal carboxylate compounds therein. Examples of metal carboxylate compounds useful herein include calcium stearate, calcium pelargonate, calcium laurate, zinc laurate, zinc stearate, aluminum distearate, aluminum laurate and aluminum pelargonate.

Impact-Resistant Olefinic-Nitrile Olefinic-Ester Copolymers Prepared In The Presence Of An Olefinic-Ester Copolymer Elastomer
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US Patent:

41637666, Aug 7, 1979
Filed:

Jun 19, 1978
Appl. No.:

5/916978
Inventors:

June T. Duke - Chagrin Falls OH
Dorothy C. Prem - Warrensville Heights OH
Assignee:

The Standard Oil Company - Cleveland OH
International Classification:

C08L 3300
US Classification:

525230
Abstract:

Impact-resistant polymers having low permeability to gases and vapors and excellent thermal color stability are prepared by polymerizing an olefinic nitrile, such as acrylonitrile, optionally with an olefinic ester, such as methyl acrylate, in an aqueous medium in the presence of an elastomer which is a copolymer of an ester of an olefinically unsaturated monocarboxylic acid, such as ethyl acrylate.

Diolefin Polymerization Process In The Presence Of Seed Polymers
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US Patent:

40791017, Mar 14, 1978
Filed:

Sep 2, 1975
Appl. No.:

5/609372
Inventors:

June T. Duke - Chagrin Falls OH
Dorothy C. Prem - Warrensville Heights OH
Assignee:

The Standard Oil Company - Cleveland OH
International Classification:

C08F13606
C08F13608
C08L 900
US Classification:

260879
Abstract:

A polymerization process is described in which conjugated diolefin polymers are prepared by free-radical polymerization at improved rates by conducting the polymerization in a batch charge of all ingredients in aqueous emulsion in the presence of some preformed seed polymer having small particle size.

Impact-Resistant Olefinic-Nitrile Olefinic-Ester Copolymers Prepared In The Presence Of An Olefinic-Ester Copolymer Elastomer
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US Patent:

41276140, Nov 28, 1978
Filed:

Jul 28, 1976
Appl. No.:

5/709536
Inventors:

June T. Duke - Chagrin Falls OH
Dorothy C. Prem - Warrensville Heights OH
Assignee:

The Standard Oil Company - Cleveland OH
International Classification:

C08L 6300
US Classification:

260836
Abstract:

Impact-resistant polymers having low permeability to gases and vapors and excellent thermal color stability are prepared by polymerizing an olefinic nitrile, such as acrylonitrile, optionally with an olefinic ester, such as methyl acrylate, in an aqueous medium in the presence of an elastomer which is a copolymer of an ester of an olefinically unsaturated monocarboxylic acid, such as ethyl acrylate.

Rubber-Modified High Nitrile Copolymers With Improved Impact Resistance
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US Patent:

42448522, Jan 13, 1981
Filed:

Nov 16, 1978
Appl. No.:

5/968937
Inventors:

Dorothy C. Prem - Sagamore Hills OH
June T. Duke - Chagrin Falls OH
Ralph E. Isley - Northfield OH
Assignee:

The Standard Oil Company - Cleveland OH
International Classification:

C08K 512
US Classification:

260 318AN
Abstract:

The inclusion of a small amount of an ester-type plasticizer in the rubber polymerization recipe in the production of rubber-modified high nitrile copolymer resins produces resins having markedly improved impact resistance at both low and high temperatures.

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Schools:

St. Luke High School Plain WI 1949-1961

Dorothy C Prem