Aqueous dispersion of a polyurethane containing blocked reactive sites
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Apr 8, 2003
Grant Date -
N/A
app pub date -
Aug 28, 2001
filing date -
Oct 15, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to an aqueous dispersion of a crosslinkable polyurethane obtained by chain extension of a polyurethane prepolymer with a compound containing hydrazone functions having general formula (1), wherein Q.sup.1 and Q.sup.2 is a hydrazone functional group of formula (2), H or R.sup.1, R and R.sup.1 in formula (1) is an organic group which has no reactivity towards the hydrazone function, R.sup.2 and R.sup.3 in formula (2) is an organic group which has no reactivity towards the hydrazone function or H, x has a value from 1 to 10, and is preferably from 1 to 4 with the proviso that at least one of the groups Q.sup.1 or Q.sup.2 is of formula (2). The invention relates also to a process for a preparation of an aqueous dispersion of a crosslinkable polyurethane containing hydrazne functions, and to the application of the aqueous dispersion of a crosslinkable polyurethane together with a polyisocyanate, a polyketone--or a polyepoxide--functional material onto a substrate. ##STR1##
First Claim
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- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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STAHL INTERNATIONAL B V | 5145 PE WAALWIJK |
International Classification(s)
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Hesselmans, Laurentius Cornelius Josephus | 's-Hertogenbosch, NL | 4 | 20 |
# of filed Patents : 4 Total Citations : 20 | |||
Van, Den Goorbergh Johanna Antonia Maria | Waalwijk, NL | 1 | 1 |
# of filed Patents : 1 Total Citations : 1 |
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Patent Citation Ranking
- 1 Citation Count
- B05D Class
- 3.72 % this patent is cited more than
- 22 Age
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Sep 30, 2024 | AS | ASSIGNMENT | free format text: NUNC PRO TUNC ASSIGNMENT;ASSIGNOR:SEIKO INSTRUMENTS INC.;REEL/FRAME:069183/0051 Owner name: SEIKO WATCH CORPORATION, JAPAN Effective Date: Sep 30, 2024 |
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May 15, 2018 | I | Issuance | |
Apr 25, 2018 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Feb 23, 2017 | P | Published | |
Aug 16, 2016 | F | Filing | |
Jul 26, 2016 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SAKAI, SATOSHI;MUGISHIMA, KATSUYA;IHASHI, TOMOHIRO;AND OTHERS;REEL/FRAME:039453/0824 Owner name: SEIKO INSTRUMENTS INC., JAPAN Effective Date: Jul 26, 2016 |
Aug 21, 2015 | PD | Priority Date |

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