Single Component Room Temperature Vulcanized Sealing Material for Nuclear Radiation Protection

doi:10.19894/j.issn.1000-0518.250247

Chinese Journal of Applied Chemistry ›› 2026, Vol. 43 ›› Issue (1): 116-118.DOI: 10.19894/j.issn.1000-0518.250247

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Single Component Room Temperature Vulcanized Sealing Material for Nuclear Radiation Protection

Chong QIN, Dong-Xue LUAN, Jin-Xiang ZHOU, Zhao-Bin CHEN()

Key Laboratory of High Performance Synthetic Rubber and Its Composites，Changchun Institute of Applied Chemistry，Chinese Academy of Sciences，Changchun 130022，China

Received:2025-06-18 Accepted:2025-10-30 Published:2026-01-01 Online:2026-01-26
Contact: Zhao-Bin CHEN
About author:zhaobinchen@ciac.ac.cn

Abstract

Abstract:

A single component room temperature vulcanized sealing material for nuclear radiation protection was prepared based on silicone rubber. Rubber compound suitable for processing was obtained by screening silicone rubber and reinforcing fillers. The vulcanization rate was regulated by combining titanate chelating agents with various catalytic activities. Coupling agents were used to improve the interfacial bonding between inorganic fillers and organic base. The shielding properties （neutron shielding rate： ≥99.9%， γ-ray attenuation ratio： ≥2.78） were provided by boron carbide and tungsten powers. The sealing material possesses good mechanical properties， excellent shielding functions， and simple operation process.

Key words: Room temperature vulcanization, Silicone rubber, Single-component, Neutron and gamma shielding, Plugging material

CLC Number:

O615.5

Chong QIN, Dong-Xue LUAN, Jin-Xiang ZHOU, Zhao-Bin CHEN. Single Component Room Temperature Vulcanized Sealing Material for Nuclear Radiation Protection[J]. Chinese Journal of Applied Chemistry, 2026, 43(1): 116-118.

Figures/Tables 2

References 7

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Test performance	RT/7 d			70 ℃/10 d
Test performance	TIPT	Cat1	Cat2	TIPT	Cat1	Cat2
Surface drying time/min	5	10	14	Uncured/72 h	21	20
Peel strength/（kN·m^-1）	2.67	2.84	2.96	-	2.61	2.79
Tensile strength/MPa	2.59	2.77	2.83	-	2.52	2.68

Test performance	RT/7 d			70 ℃/10 d
Test performance	TIPT	Cat1	Cat2	TIPT	Cat1	Cat2
Surface drying time/min	5	10	14	Uncured/72 h	21	20
Peel strength/（kN·m^-1）	2.67	2.84	2.96	-	2.61	2.79
Tensile strength/MPa	2.59	2.77	2.83	-	2.52	2.68

Test performance	KH560 quality share
Test performance	0	1.5	3.0	4.5
Peel strength/（kN·m^-1）	1.95	2.67	2.84	2.94
Tensile strength/MPa	2.28	2.49	2.46	2.49
Surface drying time/min	9±1	11±1	13±1	13±1
Curing depth mm/24 h or cure at RT for 24 h/mm	2.4±0.1	1.6±0.1	1.3±0.1	1.1±0.1
Curing depth mm/7 d or cure at RT for 7 d/mm	4±1	4±1	4±1	4±1

Test performance	KH560 quality share
Test performance	0	1.5	3.0	4.5
Peel strength/（kN·m^-1）	1.95	2.67	2.84	2.94
Tensile strength/MPa	2.28	2.49	2.46	2.49
Surface drying time/min	9±1	11±1	13±1	13±1
Curing depth mm/24 h or cure at RT for 24 h/mm	2.4±0.1	1.6±0.1	1.3±0.1	1.1±0.1
Curing depth mm/7 d or cure at RT for 7 d/mm	4±1	4±1	4±1	4±1

Single Component Room Temperature Vulcanized Sealing Material for Nuclear Radiation Protection

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