Jeffrey E Ford

US Patent:

20060189723, Aug 24, 2006

Filed:

Jul 27, 2004

Appl. No.:

10/565963

Inventors:

Jeffrey Ford - Saint Paul MN, US
Harold Rude - Saint Paul MN, US

International Classification:

B29C 47/00

US Classification:

524013000, 524035000, 528230000

Abstract:

The invention relates to an adhesive composition comprising a formaldehyde-containing aminoplast resin and a catalysing compound, with the catalysing compound being an acid or is able to release an acid with a pKa lower than 4 and with the formaldehyde-containing aminoplast resin having a F/(NH2)2 ratio lower than or equal to 1. The catalysing compound comprises at most 11 wt. % of an ammonium salt. The invention also relates to a process for the preparation of board material using the adhesive composition according to the invention and to the board material thus obtainable.

US Patent:

54862191, Jan 23, 1996

Filed:

Sep 6, 1994

Appl. No.:

8/300854

Inventors:

Jeffrey E. Ford - Woodbury MN
Ellen Y. Chu - Stillwater MN
Harold E. Rude - Roseville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C09K 314

US Classification:

51298

Abstract:

Coatable urea-aldehyde binder precursor compositions including a urea-aldehyde resin and a cocatalyst yield more consistent quality coated abrasives. In addition, the compositions have longer pot life and allow curing at lower temperatures. The urea-aldehyde resins have an aldehyde/urea ratio of at least about 1. 0, more preferably ranging from about 1. 0 to about 2. 0, and a free aldehyde content ranging from about 0. 1 to about 3. 0 weight percent based on weight of total aldehyde. The cocatalyst consists essentially of a Lewis acid and a salt selected from the group consisting of ammonium ion salts and organic amine salts. Methods of making coated and other abrasive articles using the compositions are also described.

US Patent:

56118252, Mar 18, 1997

Filed:

Sep 19, 1994

Appl. No.:

8/308656

Inventors:

Robbyn L. Engen - River Falls WI
Jeffrey E. Ford - Woodbury MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B24D 302

US Classification:

51295

Abstract:

Film-backed and paper-backed coated abrasives and methods of making same are described using coatable urea-aldehyde binder precursor compositions including a urea-aldehyde resin and a cocatalyst, which yield more consistent quality coated abrasives. In addition, the compositions have longer pot life and allow curing at lower temperatures. The urea-aldehyde resins have an aldehyde/urea molar ratio of at least about 1. 0, more preferably ranging from about 1. 0 to about 2. 0, and a free aldehyde content ranging from about 0. 1 to about 3. 0 weight percent based on weight of total aldehyde. The cocatalyst consists essentially of a Lewis acid and a salt selected from the group consisting of ammonium ion salts and organic amine salts. Paper-backed abrasive articles may employ a fabric nonwoven layer between the abrasive coating and the paper layer to reduce abrasive particle shelling.

US Patent:

55519610, Sep 3, 1996

Filed:

Jun 7, 1995

Appl. No.:

8/479318

Inventors:

Robbyn L. Engen - River Falls WI
Douglas S. Spencer - St. Paul MN
Jeffrey E. Ford - Woodbury MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

B24D 302

US Classification:

51298

Abstract:

An abrasive article and methods for making such abrasive articles, including coated and nonwoven abrasive articles, comprising (a) a plurality of abrasive particles and (b) a bond system which adheres the plurality of abrasive particles together, the bond system comprising a binder; the binder being formed from a binder precursor essentially free of organic solvent, the binder precursor comprising a blend of an urea-aldehyde resin and a water dilutable resole phenolic resin, the blend being catalyzed by an acid catalyst system and, in particular, a coated abrasive comprising (a) a backing having a major surface, (b) a plurality of abrasive particles, and (c) a bond system which adheres the plurality of abrasive particles to the major surface of the backing, the bond system comprising a binder; the binder being formed from a binder precursor comprising a blend of an urea-aldehyde resin and a water dilutable resole phenolic resin, the blend being catalyzed by an acid catalyst, wherein the blend comprises from about 5 to about 90 weight percent of the water dilutable resole phenolic resin and from about 95 to about 10 weight percent of the urea-aldehyde resin.