Inventor

ZECHER WILFRIED

36 patents

Patents

36 patents

US3939122AFeb 17, 1976

Process for the preparation of compounds which contain hydantoin rings

BAYER AG61 citations95

US4628079ADec 9, 1986

Polyamide imides produced from either lactams or polyamides with isocyanates or anhydrides in which products are precipitated with a non-solvent

BAYER AG32 citations93

US4515974AMay 7, 1985

Process for the preparation of fumaric acid monoesters

BAYER AG45 citations93

US4910045AMar 20, 1990

Process for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfaces

BAYER AG24 citations92

US4096291AJun 20, 1978

Melt coating composition and coating process

BAYER AG27 citations79

US5093457AMar 3, 1992

Production of polyamide imides

BAYER AG9 citations74

US4600729AJul 15, 1986

Process for the preparation of aliphatic-aromatic poly-amide-imides in the absence of phenols

BAYER AG6 citations74

US4549006AOct 22, 1985

Polyamideimides produced from either lactams or polyamides with isocyanates and anhydrides as thermoplasts

BAYER AG13 citations74

US4546162AOct 8, 1985

Polyamidoimides prepared from trimelitic acid anhydride, isocyanates and either lactams or polyamides using a mixture of diisocyanatodiphenylmethane and tolylene diisocyanates

BAYER AG7 citations74

US4517353AMay 14, 1985

Process for preparation of hydantoin esters through a masked polyisocyanate-carbodiimide route

BAYER AG8 citations74

US4908430AMar 13, 1990

Process for the production of polyamideimides from polyisocyanates, polycarboxylic acid anhydrides and lactams or polyamides in which the reaction products are precipitated with a non-solvent

BAYER AG4 citations63

US4548970AOct 22, 1985

Polyamideimides prepared by reacting either lactams or polyamides with polyisocyanates and anhydrides using a lactam as an additive

BAYER AG3 citations63

US4472567ASep 18, 1984

Process for the production of polyamide imides

BAYER AG4 citations63

US4196274AApr 1, 1980

Process for the production of hydantoins and polyhydantoin resins

BAYER AG2 citations63

US4182812AJan 8, 1980

Process for the preparation of hydantoin lacquers

BAYER AG2 citations63

US3979421ASep 7, 1976

Reaction products containing free isocyanato groups

BAYER AG4 citations63

US4298515ANov 3, 1981

Process for the preparation of polymers containing hydantoin groups

BAYER AG2 citations62

US4269750AMay 26, 1981

Process for the preparation of polymers containing hydantoin groups

BAYER AG3 citations62

US4187365AFeb 5, 1980

Process for the production of polycondensate containing cyclic imide groups

BAYER AG2 citations62

US4076694AFeb 28, 1978

Process for the production of polycondensates containing imide groups

BAYER AG4 citations62

US4829140AMay 9, 1989

Polyamidimides having modified end groups

BAYER AG1 citations52

US4546138AOct 8, 1985

Process for the production of polyamide imides by using a phenol in the workup of the material

BAYER AG1 citations52

US4384122AMay 17, 1983

Process for the production of imidazolidine triones

BAYER AG0 citations52

US4281140AJul 28, 1981

Process for the preparation of hydantoins

BAYER AG0 citations52

US4908429AMar 13, 1990

Special polyimides as thermoplasts

BAYER AG0 citations51

US4289868ASep 15, 1981

Polyhydantoins from unsaturated carboxylic acids and polyiso(thio)cyanates

BAYER AG1 citations51

US4212982AJul 15, 1980

Polyisocyanates with at least one hydantoin or thiohydantoin ring substituted by carboxylic acid amide groups

BAYER AG0 citations40

ZECHER WILFRIED

Patents

Process for the preparation of compounds which contain hydantoin rings

Polyamide imides produced from either lactams or polyamides with isocyanates or anhydrides in which products are precipitated with a non-solvent

Process for the preparation of fumaric acid monoesters

Process for improving the adhesive strength of electrolessly deposited metal layers on polyimide surfaces

Melt coating composition and coating process

Production of polyamide imides

Process for the preparation of aliphatic-aromatic poly-amide-imides in the absence of phenols

Polyamideimides produced from either lactams or polyamides with isocyanates and anhydrides as thermoplasts

Polyamidoimides prepared from trimelitic acid anhydride, isocyanates and either lactams or polyamides using a mixture of diisocyanatodiphenylmethane and tolylene diisocyanates

Process for preparation of hydantoin esters through a masked polyisocyanate-carbodiimide route

Use of special polyimides as cast films and coatings

Heat-resistant cross-linked polymers and the use thereof as binders

Process for the preparation of poly(thio)hydantoins

Polycondensates

Process for the production of polycondensates containing imide groups

Process for the preparation of compounds which contain hydantoin groups

Aliphatic-aromatic polyamide-imides

Aliphatic-aromatic polyamidimides containing polyamides

Process for the production of polyamide imides

Process for the production of polyamideimides from polyisocyanates, polycarboxylic acid anhydrides and lactams or polyamides in which the reaction products are precipitated with a non-solvent

Polyamideimides prepared by reacting either lactams or polyamides with polyisocyanates and anhydrides using a lactam as an additive

Process for the production of polyamide imides

Process for the production of hydantoins and polyhydantoin resins

Process for the preparation of hydantoin lacquers

Reaction products containing free isocyanato groups

Process for the preparation of polymers containing hydantoin groups

Process for the preparation of polymers containing hydantoin groups

Process for the production of polycondensate containing cyclic imide groups

Process for the production of polycondensates containing imide groups

Polyamidimides having modified end groups

Process for the production of polyamide imides by using a phenol in the workup of the material

Process for the production of imidazolidine triones

Process for the preparation of hydantoins

Special polyimides as thermoplasts

Polyhydantoins from unsaturated carboxylic acids and polyiso(thio)cyanates

Polyisocyanates with at least one hydantoin or thiohydantoin ring substituted by carboxylic acid amide groups