Coating composition of an acrylic polymer, polyol and polyisocyanate crosslinking agent
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-075/04
C08F-008/30
출원번호
US-0937281
(1992-08-31)
발명자
/ 주소
Lamb Douglas M. (Lansdale PA) Simms John A. (Wilmington DE)
출원인 / 주소
E. I. Du Pont de Nemours and Company (Wilmington DE 02)
인용정보
피인용 횟수 :
43인용 특허 :
0
초록▼
A coating composition primarily used as a clear coat of a clearcoat/color coat automotive finish; the composition has a film forming binder solids content of about 30-70% by weight contains about (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer of polymerized monomers o
A coating composition primarily used as a clear coat of a clearcoat/color coat automotive finish; the composition has a film forming binder solids content of about 30-70% by weight contains about (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer of polymerized monomers of styrene, and two methacrylate monomers and a hydroxy alkyl methacrylate or acrylate each having 1-4 carbon atoms in the alkyl group and the polymer has a number average molecular weight of about 1,000-12,000 and a calculated Tg of at least 40°C. and (B) 1-20% by weight, based on the weight of the binder, of a polyol component and (C) 10-49% by weight, based on the weight of the binder, of an organic polyisocyanate.
대표청구항▼
A clear coating composition which cures at ambient temperatures having a film forming binder solids content of about 30-70% by weight and an organic liquid carrier, wherein the binder contains about (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially
A clear coating composition which cures at ambient temperatures having a film forming binder solids content of about 30-70% by weight and an organic liquid carrier, wherein the binder contains about (A) 50-80% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of polymerized monomers of styrene, a methacrylate monomer selected from the group consisting of methyl methacrylate, isobornyl methacrylate, cyclohexyl methacrylate or any mixtures thereof, a second methacrylate monomer selected from the group consisting of n-butyl methacrylate, isobutyl methacrylate or ethyl hexyl methacrylate or any mixtures thereof and a hydroxy alkyl methacrylate or hydroxy alkyl acrylate each having 1-4 carbon atoms in the alkyl group; wherein the acrylic polymer has a number average molecular weight of about 1,000-12,000 determined by gel permeation chromatography and a calculated Tg of at least 40°C., (B) 1-20% by weight, based on the weight of the binder, of a polyol component comprising a compound of the formula of [Figure] wherein: R1 is a covalent bond or alkylene containing 1, 2, 3 or 4 carbon atoms; n is about 1 to about 4; m is 2, 3 or 4; and Q is a saturated carbocyclic ring containing 5 or 6 carbon atoms, or S－R2－T wherein S and T are each independently saturated carbocyclic rings containing 5 or 6 carbon atoms, and R2 is a covalent bond or an alkylene group containing 1, 2 or 3 carbon atoms; provided that no more than one R1 is bound to any c carbocyclic carbon atom, and further provided that when Q is S－R2－T, each R1 is bound to a carbon atom of the carbocyclic rings of S and T and (C) 10-49% by weight, based on the weight of the binder, of an organic polyisocyanate.
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