GB1046230A - Improvements relating to abrasives - Google Patents

Improvements relating to abrasives

Info

Publication number
GB1046230A
GB1046230A GB5008163A GB5008163A GB1046230A GB 1046230 A GB1046230 A GB 1046230A GB 5008163 A GB5008163 A GB 5008163A GB 5008163 A GB5008163 A GB 5008163A GB 1046230 A GB1046230 A GB 1046230A
Authority
GB
United Kingdom
Prior art keywords
reactants
aliphatic
aromatic
solvent
formula
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB5008163A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB1046230A publication Critical patent/GB1046230A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
    • C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

A method of making an abrasive article comprises mixing at least one diamine having the formula H2N-R-NH2, where R1 is an aromatic, aliphatic, cycloaliphatic, combination of aromatic and aliphatic, heterocyclic or bridged organic radical where the bridge is oxygen, nitrogen, sulphur, silicon or phosphorus, or a substituted derivative thereof with at least one tetracarboxylic acid dianhydride of the formula <FORM:1046230/C4-C5/1> where R is a tetravalent radical having at least 2 carbon atoms, no more than 2 carbonyl groups of said dianhydride attached to any one carbon atom of said tetravalent radical, in a solvent for at least one of said reactants, the solvent being inert to the reactants under conditions to form a polyamide-acid having an inherent viscosity of at least 0.1, adding at any stage prior to shaping crystalline, abrasive particles of green rouge, silica, alumina, boron carbide, silicon carbide, steel or diamond to form a shapeable polymeric composition having said particles dispersed uniformly therein; shaping said composition into a shaped article and converting the polymer to polyimide. Many conventional reactants and solvents are specified. Examples are given, the exemplified articles being discs and films.ALSO:A method of making an abrasive article comprises mixing at least one diamine having the formula H2N-R1-NH2, where R1 is an aromatic, aliphatic, cycloaliphatic, combination of aromatic and aliphatic, heterocyclic or bridged organic radical where the bridge is oxygen, nitrogen, sulphur, silicon or phosphorus, or a substituted derivative thereof with at least one tetracarboxylic acid dianhydride of the formula <FORM:1046230/C3/1> where R is a tetravalent radical having at least 2 carbon atoms, no more than 2 carbonyl groups of said dianhydride attached to any one carbon atom of said tetravalent radical, in a solvent for at least one of said reactants, the solvent being inert to the reactants under conditions to form a polyamide-acid having an inherent viscosity of at least 0.1; adding at any stage prior to shaping crystalline, abrasive particles of green rouge, silica, alumina, boron carbide, silicon carbide, steel or diamond to form a shapeable polymeric composition having said particles dispersed uniformly therein; shaping said composition into a shaped article and converting the polymer to polyimide. Many conventional reactants and solvents are specified. Examples are given, the exemplified articles being discs and films.
GB5008163A 1962-12-19 1963-12-18 Improvements relating to abrasives Expired GB1046230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US24565262A 1962-12-19 1962-12-19

Publications (1)

Publication Number Publication Date
GB1046230A true GB1046230A (en) 1966-10-19

Family

ID=22927538

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5008163A Expired GB1046230A (en) 1962-12-19 1963-12-18 Improvements relating to abrasives

Country Status (4)

Country Link
BE (1) BE641568A (en)
DE (1) DE1300272B (en)
GB (1) GB1046230A (en)
NL (2) NL141910B (en)

Also Published As

Publication number Publication date
NL302241A (en)
BE641568A (en) 1964-06-19
NL141910B (en) 1974-04-16
DE1300272B (en) 1969-07-31

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