# US 10,308,804 B2 · Unsaturated polyester composition for autobody repair with improved adhesion to metal substrates

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- Number: US 10,308,804 B2
- Document ID: US10308804B2
- Status: Granted
- Kind: B2
- Application number: 15/638,807
- Filed: 2017-06-30
- Published: 2018-01-18
- Granted: 2019-06-04
- Earliest claimed: 2016-07-13
- Assignees: Illinois Tool Works Inc.
- Applicants: Illinois Tool Works Inc.
- Inventors: Robert M. Adams; Helena Twardowska; Michael Schallick
- Web page: https://patentgrep.com/patent/US10308804B2

## CPC

- C08L 67/07: having terminal carbon-to-carbon unsaturated bonds
- C08K 5/0025: {Crosslinking or vulcanising agents; including accelerators}
- C08K 7/22: Expanded, porous or hollow particles
- C08L 67/06: Unsaturated polyesters
- C09D 5/34: Filling pastes (materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12)
- C09D 7/70: {characterised by shape, e.g. fibres, flakes or microspheres}
- C09D 167/06: Unsaturated polyesters having carbon-to-carbon unsaturation
- C09D 167/07: having terminal carbon-to-carbon unsaturated bonds
- C08L 2205/18: Spheres
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)
- C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D)

## Abstract

A vehicle body repair formulation is provided that includes a polyester resin having a degree of unsaturation of between 25 and 100 molecule percent based on total acid and anhydride content. The polyester resin is dissolved or suspended in a monomer reactive diluent. Microspheroids are provided to enhance the sandability of a cured formulation. An initiator package is also provided. The reactive diluent/monomer can be chosen to be non-stryrenic to improve performance properties. A process for repairing a vehicle body is provided using ambient conditions alone or in combination with thermal source to aid in cure after applied to the vehicle body in need of repair.

## Claims

### Claim 1

A vehicle body repair formulation comprising:
a polyester resin having a degree of unsaturation of between 80 and 100 mole percent based on total acid and anhydride monomer content;
a monomer reactive diluent in which said polyester resin is dissolved or suspended;
thermoplastic microspheroids; and
an initiator package.

### Claim 2 (depends on 1)

The formulation of claim 1 wherein the degree of unsaturation is 100 mole percent.

### Claim 3 (depends on 1)

The formulation of claim 1 wherein the total acid and anhydride content is only maleic acid.

### Claim 4 (depends on 1)

The formulation of claim 1 wherein the total acid and anhydride content comprises at least two of nadic esters, nadic acid and phthalic acid.

### Claim 5 (depends on 1)

The formulation of claim 1 wherein said monomer reactive diluent is a non-styrenic aryl monomer with vinyl functionality.

### Claim 6 (depends on 1)

The formulation of claim 1 wherein said monomer reactive diluent comprises vinyl toluene.

### Claim 7 (depends on 1)

The formulation of claim 1 wherein said monomer reactive diluent consists of only vinyl toluene.

### Claim 8 (depends on 1)

The formulation of claim 1 wherein said monomer reactive diluent is one or more of: methyl methacrylate, butyl acrylate, ethyl-hexyl acrylate, hydroxypropyl methacrylate, hydroxyethyl methacrylate, lauryl acrylate, stearyl methacrylate, lauryl methacrylate, butanediol diacrylate, ethyleneglycol dimethacrylate, ethyleneglycol-DCPD methacrylate, ethyl(meth)acrylate, n- and isobutyl(meth)acrylate, cyclohexyl(meth)acrylate, isobornyl(meth)acrylate, benzyl(meth)acrylate, butyleneglycol dimethacrylate, diethyleneglycol dimethacrylate, triethyleneglycol dimethacrylate, propyleneglycol dimethacrylate, dipropyleneglycol dimethacrylate, tripropyleneglycol dimethacrylate and trimethylolpropane triacrylate, DCPD diacrylate, ether monomers of the structure (C1-C6 alkyl)-O—(C2-C6 alkylene), vinyl toluene, allyl substituted benzene, di-vinyl benzene, and di- and trifunctional acrylates.

### Claim 9 (depends on 1)

The formulation of claim 1 wherein said microspheroids are from 20 to 150 microns in a longest linear dimension.

### Claim 10 (depends on 1)

The formulation of claim 1 wherein said microspheroids are hollow.

### Claim 11 (depends on 1)

The formulation of claim 1 wherein said microspheroids are present from 0.50 to 2.0 total weight percent.

### Claim 12

A process for repairing a vehicle body comprising:
mixing a polyester resin formulation part A comprising: a polyester resin having a degree of unsaturation of between 80 to 100 mole percent based on total acid and anhydride monomer content with a part B initiator package, at least one of said part A or said part B containing thermoplastic microspheroids to form a curable mixture;
applying said mixture to a substrate of the vehicle body in need of repair;
exposing said mixture to ambient conditions alone or in combination with a thermal source to promote cure of said mixture; and curing said mixture to form a fill to repair the vehicle body.

### Claim 13 (depends on 12)

The process of claim 12 wherein said curing occurs within 60 minutes of forming said mixture.

### Claim 14 (depends on 12)

The process of claim 12 further comprising sanding said fill.

### Claim 15 (depends on 14)

The process of claim 14 wherein said sanding occurs within 30 minutes of forming said mixture.

### Claim 16 (depends on 12)

The process of claim 12 wherein said thermal source is present and is an infrared lamp.

### Claim 17 (depends on 12)

The process of claim 12 wherein said exposing raises a temperature of the mixture to a temperature of between 37 and 82° C.