[특허]Polyester-carbamate polymer and coating compositions thereof

Polyester-carbamate polymer and coating compositions thereof 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C08G-063/91 C08G-018/42 C08G-018/80 C09D-175/06 B65D-025/14 C08L-027/06
출원번호	US-0562259 (2014-12-05)
등록번호	US-9745416 (2017-08-29)
발명자 / 주소	Doreau, Nicolas Prouvost, Benoit Stenson, Paul
출원인 / 주소	Valspar Sourcing, Inc.
인용정보	피인용 횟수 : 0 인용 특허 : 40

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A polyester-carbamate polymer and coating compositions containing the polymer are provided. The polyester-carbamate polymer preferably includes a polyester-carbamate backbone and one or more blocked isocyanate groups. A coating composition is provided that preferably includes the polyester-carbamate

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1. A polyester-carbamate polymer comprising: a backbone that includes a plurality of ester and carbamate linkages, wherein the backbone includes a plurality of polyester oligomer or polymer segments that are attached on at least one end to another portion of the backbone via a carbamate linkage, andone or more pendant deblockable isocyanate groups. 2. The polyester-carbamate polymer of claim 1, wherein the polyester-carbamate polymer includes at least one terminal hydroxyl group and has a number average molecular weight of at least 3,000. 3. The polyester-carbamate polymer of claim 1, wherein the polyester-carbamate polymer has a hydroxyl number of from at least 15 to less than 100. 4. The polyester-carbamate polymer of claim 1, wherein the polyester-carbamate polymer comprises a reaction product of (i) a partially blocked polyisocyanate having on average from 1.5 to 3 free isocyanate groups and (ii) a hydroxyl-terminated polyester oligomer or polymer. 5. The polyester-carbamate polymer of claim 4, wherein the ratio of free isocyanate groups in (i) to terminal hydroxyl groups in (ii) is from 0.25:1 to 0.9:1. 6. The polyester-carbamate polymer of claim 4, wherein the ratio of free isocyanate groups in (i) to terminal hydroxyl groups in (ii) is from 0.5:1 to 0.8:1. 7. The polyester-carbamate polymer of claim 4, wherein the hydroxyl-terminated polyester oligomer or polymer has a hydroxyl number of from 35 to 115 and a number average molecular weight of at least 1,000. 8. The polyester-carbamate polymer of claim 4, wherein the polyester-carbamate polymer includes two terminal hydroxyl group. 9. The polyester-carbamate polymer of claim 4, wherein the partially blocked polyisocyanate has on average from 2 to 2.2 free isocyanate groups. 10. The polyester-carbamate polymer of claim 4, wherein the partially blocked polyisocyanate has on average at least 0.5 deblockable isocyanate groups. 11. The polyester-carbamate polymer of claim 4, wherein the one or more pendant deblockable isocyanate groups comprises a reaction product of an isocyanate group and one or more of ε-caprolactam, methyl ethyl ketoxime (MEKO), diisopropylamine (DIPA), or a mixture thereof. 12. The polyester-carbamate polymer of claim 4, wherein the ratio of free isocyanate groups in (i) to terminal hydroxyl groups in (ii) is less than 1:1. 13. The polyester-carbamate polymer of claim 12, wherein the hydroxyl-terminated polyester oligomer or polymer has a hydroxyl number of from 15 to 200. 14. The polyester-carbamate polymer of claim 12, wherein the partially blocked polyisocyanate comprises an isocyanate trimer. 15. The polyester-carbamate polymer of claim 12, wherein the partially blocked polyisocyanate is a trimerization product prepared from on average three moles of diisocyanate reacted with one mole of another compound. 16. The polyester-carbanate polymer of claim 15, wherein the diisocyanate is an aliphatic diisocyanate. 17. The polyester-carbanate polymer of claim 16, wherein the aliphatic diisocyanate comprises isophorone diisocyanate or hexamethylene diisocyanate. 18. The polyester-carbamate polymer of claim 12, wherein the partially blocked polyisocyanate has on average from 1.8 to 2.5 free isocyanate groups. 19. The polyester-carbamate polymer of claim 12, wherein the partially blocked polyisocyanate has on average at least 0.7 deblockable isocyanate groups. 20. The polyester-carbamate polymer of claim 12, wherein the partially blocked polyisocyanate has on average at least 1 deblockable isocyanate groups. 21. A polyester-carbamate polymer comprising: a backbone that includes both ester and carbamate linkages and includes at least one terminal hydroxyl group, andone or more pendant deblockable isocyanate groups;wherein the polyester-carbamate polymer has a number average molecular weight of at least 3,000 and comprises a reaction product of (i) a partially blocked polyisocyanate having on average: from 1.5 to 3 free isocyanate groups and at least 0.5 deblockable isocyanate groups and (ii) a hydroxyl-terminated polyester oligomer or polymer, and wherein the ratio of free isocyanate groups in (i) to terminal hydroxyl groups in (ii) is less than 1:1.

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