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Cyanoacrylate Adhesive
Woody

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Woody

22. september 2026NO
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Cyanoacrylate Adhesive

Harry Coover first met cyanoacrylates in 1942 while looking for a clear plastic for gun sights, and rejected them because they stuck to everything. In 1951 at Eastman Kodak he and Fred Joyner met them again - and this time saw a glue that set in seconds with no heat or pressure. It was sold from 1958. **US 2,794,788**, "Adhesive compositions containing alkyl esters of cyanoacrylic acid", Coover and Shearer, Eastman Kodak, filed 1. November 1952, granted 4. June 1957, claims the monomeric alkyl α-cyanoacrylate adhesive. **US 2,768,109**, "Alcohol-catalyzed alpha-cyanoacrylate adhesive compositions", Coover, filed 2. June 1954, granted 23. October 1956, claims "strongly bonding wood having an acidic surface character" by first moistening it with an alcohol of 1 to 8 carbon atoms. **You test that second claim on oak**, an acidic wood: dry, wiped with isopropyl alcohol, and misted with water.
Byrjandi
1 hour plus 24 h

Leiðbeiningar

1

Cut the strips

Saw eighteen oak strips 80 x 20 mm, about 5 mm thick. Sand one end face of each with 180 grit and dust off. Pencil-mark three groups: dry, IPA, water.

Efni fyrir þetta skref:

HvíteikarborðHvíteikarborð1 stykki

Nauðsynleg verkfæri:

HandsögHandsög
SandpappírSandpappír
2

Prepare the surfaces

Leave the first group dry. Wipe the ends of the second with isopropyl alcohol on a towel and use them within a minute. Give the third one light mist of water and blot. Note the room humidity.

Nauðsynleg verkfæri:

VatnsúðabrúsiVatnsúðabrúsi
RakamælirRakamælir
EldhúspappírEldhúspappír
Ísóprópanól 99 %Ísóprópanól 99 %
3

Glue and time

Gloves and glasses on. One drop of CA on one end, overlap a partner strip by 20 mm, press 5 seconds and start the stopwatch. Every 10 seconds hang the spring scale from the free strip and pull to 2 N: record when it first holds. Three joints per group.

Nauðsynleg verkfæri:

SkeiðklukkaSkeiðklukka
Kraftmælir (gormvog)Kraftmælir (gormvog)
NítrílhanskarNítrílhanskar
Tær öryggisglerauguTær öryggisgleraugu
Augnabliklím (sýanóakrýlat)Augnabliklím (sýanóakrýlat)
4

Break them tomorrow

After 24 hours clamp one strip of each joint in the vise and tap the free end sideways with the mallet until it breaks. Estimate how much of the bond area is torn wood.

Nauðsynleg verkfæri:

SkrúfstykkiSkrúfstykki
GúmmíhamarGúmmíhamar
Tær öryggisglerauguTær öryggisgleraugu
5

Set times and joints

Hleð Jupyter-vinnubók…
6

History & Context

**What the patents specify:** a monomeric alkyl α-cyanoacrylate adhesive held liquid by an acid inhibitor, and, for acidic surfaces, a prior wipe with a C1–C8 alcohol. **Modern build (derived):** hardware-store CA glue on oak. CA spread from industry to every workshop, and in the Vietnam War medics used a CA spray to seal wounds; purpose-made medical grades followed. Its limits: brittle joints that fail in peel and impact, poor gap filling, and it bonds skin instantly - acetone releases it.
Skref 6 - Image 1

Efni

1

Nauðsynleg verkfæri

13

Tengd Blueprint

Þessi blueprint deila þekkingu — tækni, efni eða meginreglur

Epoxy Resin

Epoxy Resin

eftir WoodyNO

Trésmiði

50
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Cast Acrylic Sheet

Cast Acrylic Sheet

eftir PixelFI

Plastvinnsla

44
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CC0 opinbert ríki

Þessi teikning er gefin út undir CC0. Þér er frjálst að afrita, breyta, dreifa og nota þetta verk í hvaða tilgangi sem er, án þess að biðja um leyfi.

Studdu smiðinn með því að kaupa vörur í gegnum teikningu hans þar sem hann fær þóknun smiða sem seljendur ákvarða, eða búðu til nýja endurskoðun á þessari teikningu og tengdu hana sem tengingu í þinni eigin teikningu til að deila tekjum.

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