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Nairit

2-chlorobuta-1,3-diene · also: Duprene, Svitpren, Neoprene, Sovprene, Neobond R, Convulfix

FormulaC4H5Cl
Mol. weight88.534
PubChem CID31369
InChIKeyYACLQRRMGMJLJV-UHFFFAOYSA-N
SMILESC=CC(=C)Cl
53,902Patents
136Research papers
3,007Patents - last 3 years
0Papers - last 3 years

Who owns the IP

The organizations most actively patenting around this compound, ranked by referenced patent volume.

#AssigneePatents
1Denka Co Ltd1,344
2EIDP Inc835
3Bayer AG651
4BASF SE319
5Goodyear Tire and Rubber Co312
6Bridgestone Corp259
7JSR Corp212
83M Innovative Properties Co209
9China Petroleum and Chemical Corp197
10Evonik Operations GmbH197

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This preview shows the leading assignees. Cypris reveals the full ownership landscape - every filing entity, filing trends, and portfolio momentum.

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Where innovation is concentrated

Patent classifications ranked by volume reveal the technical domains with the most active filing.

#CodeAreaPatents
1C08LPolymer compositions (blends)12,640
2C08KPolymer compositions (additives)9,578
3C08FPolymers from C=C unsaturated bonds5,710
4Y10TCross-reference (technical subjects)3,934
5C08JWorking-up of plastics3,327
6C09JAdhesives2,826
7B32BLayered products2,392
8B29CShaping of plastics2,172
9C09DCoatings, paints, varnishes2,123
10Y10SCross-reference (legacy)1,608

AI mapped opportunity space

This preview shows where patent activity concentrates. Cypris maps the full classification landscape to surface technical whitespace and IP headroom.

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Most-cited patents

Patents ranked by forward citations reveal the foundational inventions the field continues to build on.

TitleYearAssigneeCited by
Breathable neoprene substitute2005Resmed Pty Ltd79
Process of vulcanizing neoprene by using certain 2-hydroxyalkyl N,N-dialkyldithiocarbamates as accelerators1975Vanderbilt Chemicals LLC58
Neoprene bottle insulator2003SILBERT CURT EDWARD53
Powder free neoprene surgical gloves2001Allegiance Corp50
FLEXIBLE FIRE RETARDANT POLYISOCYANATE MODIFIED NEOPRENE FOAM1973National Aeronautics and Space Administration NASA42

Where research is gaining momentum

Research themes ranked by publication activity show where scientific interest is accelerating around this compound.

#Research topicPapers
1Air Quality and Health Impacts1
2Cancer-related Molecular Pathways1
3Carcinogens and Genotoxicity Assessment1
4Chemical Analysis and Environmental Impact1
5Human Health and Disease1

Who's driving the science

The most-published authors working with this compound, alongside their primary affiliations.

#AuthorAffiliationPapers
1Matthew W. HimmelsteinDuPont (United States)9
2Gary M. MarshUniversity of Pittsburgh7
3Harvey J. ClewellTriangle6
4Jeanine M. BuchanichUniversity of Pittsburgh6
5Ronald L. MelnickNational Institute of Environmental Health Sciences6
6Ada O. YoukUniversity of Pittsburgh5
7Margaret PhillipsUniversity of Oklahoma Health Sciences Center5
8Nurtan A. EsmenUniversity of Illinois Chicago5
9Robert C. SillsNational Institute of Environmental Health Sciences5
10Bernard T. GoldingNewcastle University4

Research leaders

This preview lists the top authors. Cypris surfaces the full researcher landscape, their affiliations, and how scientific influence is shifting.

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The literature that defines it

The most-cited papers anchoring the scientific record for this compound.

Frequently asked questions

Common questions about this compound's patent and research landscape, answered from the underlying data.

What is the molecular composition of Nairit?

Nairit, also known as 2-chlorobuta-1,3-diene, has the molecular formula C4H5Cl and a molecular weight of 88.534. Its InChI Key is YACLQRRMGMJLJV-UHFFFAOYSA-N.

Which companies hold the most patents related to Nairit?

Denka Co Ltd leads with 1344 patents, followed by EIDP Inc with 835 patents and Bayer AG with 651 patents. Other significant patent holders include BASF SE, Goodyear Tire and Rubber Co, Bridgestone Corp, and JSR Corp.

What are the primary patent classification areas for Nairit?

The dominant patent classifications are C08L (macromolecular compounds) with 12640 patents, C08K (fillers, reinforcing agents) with 9578 patents, and C08F (macromolecular compounds formed by addition polymerization) with 5710 patents. These classifications reflect Nairit's primary use in polymer and elastomer applications.

What health and safety research topics are associated with Nairit?

Research on Nairit focuses on topics including Carcinogens and Genotoxicity Assessment, Toxic Organic Pollutants Impact, DNA Repair Mechanisms, and related chemical evaluation. Notable studies have examined mutagenicity and multiple organ carcinogenicity in animal models exposed to chloroprene.

How has patent activity for Nairit changed in recent years?

Patent activity has remained substantial, with 2720 patents filed in 2020, 2809 in 2021, 2552 in 2023, and 3125 patents filed in the last three years. However, 2024 and 2025 show lower numbers (1527 and 242 respectively), reflecting the incomplete nature of recent year data.

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