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Established in 1997 Bonyan Kala Chemie (BKC) is the leading Iranian manufacturer of solvent-based Alkyd and Unsaturated Polyester Resins and paint driers.

As a privately owned, ISO certified organization, BKC is a strong export oriented company with its annual 40 kMT production throughput and sales to domestic and export markets vastly scattered in MENA, CIS and Eastern Europe; for paint, coatings and composite industries. Our wide product portfolio and application range is strongly supported by a firm backbone of highly competent technical team, state of the art expertise and sophisticated QC/R&D laboratories equipped aligned with international standards.

This successful steady presence in the international markets has scored BKC as a distinguished pioneering export manufacturer of its sector.

Besides, through persistent implementation of ISO 9001:2015-the Quality Management System- accredited by international and national inspection and classification entities, we ensure that our premium quality products are satisfactorily supplied to our clients.

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BUP 623 is an un-promoted orthophthalic based unsaturated polyester resin with medium viscosity, limited shrinkage and very good mechanical properties for ambient temperature cure with MEK peroxide.

BUP 623

BUP 615 is an un-promoted orthophthalic based unsaturated polyester resin with low color, medium viscosity and good mechanical properties for ambient temperature cure with MEK peroxide.

BUP 615

BAS 305 X-50 is an air drying short oil alkyd resin based on soybean oil fatty acid which offers very good hardness, gloss and gloss retention and excellent surface and deep drying and pigment wetting and dispersing.

BAS 305 X-50

BAS 312 X-60 is a short oil alkyd resin based on soybean oil fatty acid which offers excellent hardness, adhesion and flexibility and very good surface and deep drying and gloss and gloss retention.

BAS 312 X-60

BAM 208 WSX-55 is a medium oil alkyd resin based on soybean oil fatty acid which offers very good hardness, surface and deep drying and adhesion and excellent gloss and gloss retention.

BAM 208 WSX-55

BUP 620 is an un-promoted orthophthalic based unsaturated polyester resin with low reactivity, medium viscosity, good flexibility and transparency for ambient temperature cure with MEK peroxide.

BUP 620

BUP 625 is an un-promoted orthophthalic based unsaturated polyester resin with medium viscosity, very good flexibility and mechanical properties for ambient temperature cure with MEK peroxide.

BUP 625

BUP 640 is an un-promoted orthophthalic based unsaturated polyester resin with very low color, high solid and viscosity, good flexibility, transparency and mechanical properties for ambient temperature cure with MEK peroxide.

BUP 640

BUP 631 is a pre-promoted and thixotropic orthophthalic based unsaturated polyester resin with medium viscosity, limited water absorption, resistant to hydrolysis and very good mechanical properties for ambient temperature cure with MEK peroxide.

BUP 631

Bonyan Kala Chemie

Established in 1997 Bonyan Kala Chemie (BKC) is the leading Iranian manufacturer of solvent-based Alkyd and Unsaturated Polyester Resins and paint driers.

As a privately owned, ISO certified organiza

Bonyan Kala Chemie - Alkyd Resins - Paint Driers - Knowde

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BUP 620 Technical Data Sheet

BUP 620 Technical Data Sheet - Bonyan Kala Chemie

BUP 620 - Bonyan Kala Chemie - Polyesters - Gelcoat - Glass

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	Value	Units	Test Method / Conditions
Water absorption	Max 0.3	wt%	ISO 62
Acid number	Max 26	mg KOH/g	ASTM D1639
Color	max. 0.5	Gardner	ASTM D1544
Curing time	18-11	min	ASTM D2471
Density (at 23°C)	1.1339	g/cm³	ASTM D1475
Flash point (open cup)	24.5	°C	ASTM D92
Flexural modulus	2577	MPa	ISO 178
Flexural strength	Min 130	MPa	ISO 178
Gel Time	18-12	min	ASTM D2471
Hardness (Barcol)	min. 44	—	ASTM D2583
Heat distortion temperature (HDT)	Min 75	°C	ASTM D648
Linear shrinkage (ΔL/L)	Max 1.3	%	ASTM D2566
Peak exothermic temperature	Max 200	°C	ASTM D2471
Solid content	62±3	wt%	ASTM D1259
Tensile elongation	4.9	%	ISO 527-2
Tensile modulus	1106	MPa	ISO 527-2
Tensile strength	Min 70	MPa	ISO 527-2
Viscosity (at 25°C)	400-650	mPa.s (cP)	ISO 2555

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