# US 5,703,153 A · Multi-temperature glue stick

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- Number: US 5,703,153 A
- Document ID: US5703153A
- Status: Granted
- Kind: A
- Application number: 08/336,256
- Filed: 1994-11-07
- Granted: 1997-12-30
- Earliest claimed: 1993-06-01
- Assignees: Uniplast, Inc.
- Inventors: Elias Shukri Maayeh
- Web page: https://patentgrep.com/patent/US5703153A

## CPC

- C09J 9/005: {Glue sticks}
- C08L 23/08: Copolymers of ethene (C08L23/16 takes precedence)
- C09J 2423/00: Presence of polyolefin
- 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)
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

An adhesive composition is comprised of a mixture of an EVA copolymer and two tackifying resins, a high temperature tackifying resin and a low temperature tackifying resin. The viscosity of the adhesive composition is between 2,000 cps to 80,000 cps over a temperature range of 250.degree. F. to 380.degree. F. The composition comprises 60% by weight of the copolymer, 15% by weight of the low temperature tackifying resin and 25% by weight of the high temperature tackifying resin.

## Claims

### Claim 1

A glue stick adapted for use in a glue gun operating at either about 250.degree. F. or about 380.degree. F. which stick comprises EVA copolymer and tackifier, said stick providing a viscosity of glue between about 5000 cps and about 40,000 cps when applied at temperatures between about 380.degree. F. and about 250.degree. F.

### Claim 2 (depends on 1)

The glue stick of claim 1 comprising:
(a) a major portion of an EVA copolymer having a predetermined softening point;
(b) a low temperature tackifying resin having a softening point about 20.degree. C. above the softening point of said EVA copolymer; and
(c) a high temperature tackifying resin having a softening point about 45.degree. C. above the softening point of said EVA copolymer.

### Claim 3 (depends on 2)

The glue stick of claim 2 wherein said low temperature tackifying resin is present in an amount from 10% to 20%.

### Claim 4 (depends on 2)

The glue stick of claim 2 wherein said high temperature tackifying resin is present in an amount from 20% to 30%.

### Claim 5 (depends on 3)

The glue stick of claim 3 wherein said high temperature tackifying resin is present in amount from 20% to 30%.

### Claim 6 (depends on 2)

The glue stick of claim 2 wherein the softening point of the EVA copolymer is about 85.degree. C.

### Claim 7 (depends on 3)

The glue stick of claim 3 wherein the softening point of the EVA copolymer is about 85.degree. C.

### Claim 8 (depends on 4)

The glue stick of claim 4 wherein the softening point of the EVA copolymer is about 85.degree. C.

### Claim 9 (depends on 5)

The glue stick of claim 5 wherein the softening point of the EVA copolymer is about 85.degree. C.