Title: Polyester coating composition

Abstract: Coating compositions having a high degree of elasticity, as well as toughness, durability and good metallic pigment pattern control are disclosed. This combination of properties makes the coatings particularly desirable for use on elastomeric substrates such as those associated with automobiles. The coating compositions comprise as a resinous component, an ungelled hydroxyl-containing polyester of high weight average molecular weight. The polyesters can be cured with a curative such as an aminoplast to give coatings having outstanding elastomeric properties and good pigment dispersibility, particularly good metallic pigment pattern control, properties not normally associated with polyesters for use in coating applications.

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Inventors: Piccirilli, Robert M. (Pittsburgh, PA, US)
Chang, Wen-Hsuan (Gibsonia, PA, US)
McKeough, David T. (Gibsonia, PA, US)
Porter, Jr., Samuel (Natrona Heights, PA, US)

Application Number: 897963
Filing Date: 1978-04-19
Publication_date: 1980-05-27
Assignee: PPG Industries, Inc. (Pittsburgh, PA)
Primary Class(es): 428/334 428/423.1, 428/482, 428/483, 428/524, 524/538, 524/539, 524/602, 524/604, 524/605, 528/288, 528/291, 528/304
Other Classes:
US Patent Ref:

2852491	Sep, 1958	Caldwell	528/288.
2925405	Feb, 1960	Laakso et al.	528/288.
2970986	Feb, 1961	Woodward	528/288.
3427267	Feb, 1969	Stieger et al.	260/22.
3691258	Sep, 1972	Riemhofer et al.	260/850.
3893976	Jul, 1975	Modler et al.	528/288.
3959228	May, 1976	Massey	528/288.
3970687	Jul, 1976	Braun	528/288.

Other Refs:
Primary Examiner: Lusignan, Michael R.
Assistant Examiner:
Attorney: Uhl; William J.