# US 4,395,504 A · Adhesive system for particleboard manufacture

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,395,504 A
- Document ID: US4395504A
- Status: Granted
- Kind: A
- Application number: 06/415,143
- Filed: 1982-09-07
- Granted: 1983-07-26
- Earliest claimed: 1982-09-07
- Assignees: Sun Chemical Corporation
- Inventors: Theodore Sulzberg; Chi Ma
- Web page: https://patentgrep.com/patent/US4395504A

## CPC

- C08G 12/26: with heterocyclic compounds
- C09J 161/26: of aldehydes with heterocyclic compounds
- Y10T 428/253: Cellulosic [e.g., wood, paper, cork, rayon, etc.]
- Y10T 428/2998: including synthetic resin or polymer
- Y10T 428/31957: Wood
- Y10T 428/31989: Of wood
- C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A formaldehyde-free adhesive system for the manufacture of particleboard comprises the reaction product of a cyclic urea and glyoxal in an equivalent ratio of about 1.1-1.5:1.

## Claims

### Claim 1

In a particleboard that comprises particles of wood and a formaldehyde-free resin adhesive system, the improvement wherein the resin adhesive system comprises the product of the reaction of a cyclic urea and glyoxal in the equivalent ratio of about 1.1-1.5:1.

### Claim 2

A formaldehye-free resin adhesive system for particleboard which comprises a cyclic urea:glyoxal condensate wherein the equivalent ratio of the cyclic urea:glyoxal is about 1.1-1.5.

### Claim 3 (depends on 2)

The condensate of claim 2 wherein the cyclic urea is ethylene urea.

### Claim 4 (depends on 2)

The condensate of claim 2 wherein the equivalent ratio of cyclic urea:glyoxal is about 1.2-1.4:1.

### Claim 5 (depends on 2)

The condensate of claim 2 wherein the equivalent ratio of cyclic urea:glyoxal is 1.3:1.